diff --git a/.github/workflows/gofmt.yml b/.github/workflows/gofmt.yml
new file mode 100644
index 00000000..a60ba936
--- /dev/null
+++ b/.github/workflows/gofmt.yml
@@ -0,0 +1,11 @@
+name: Go-fmt
+on: push
+jobs:
+  gofmt:
+    name: Go fmt project
+    runs-on: ubuntu-latest
+    steps:
+      - name: check out
+        uses: actions/checkout@v3
+      - name: go fmt project
+        uses: Jerome1337/gofmt-action@v1.0.4
\ No newline at end of file
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 380e2e85..8732edb7 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -2,11 +2,11 @@ name: Go Test
 on:
   push:
     branches:
-    - master
-    - release/*
+      - master
+      - release/*
   pull_request:
     branches:
-    - master
+      - master
 
 jobs:
   build:
@@ -14,18 +14,20 @@ jobs:
     runs-on: macOS-latest
     steps:
 
-    - name: Set up Go 1.13
-      uses: actions/setup-go@v1
-      with:
-        go-version: 1.13
-      id: go
+      - name: Set up Go 1.20
+        uses: actions/setup-go@v3
+        with:
+          go-version: 1.20.3
+        id: go
 
-    - name: Check out code into the Go module directory
-      uses: actions/checkout@v1
+      - name: Check out code into the Go module directory
+        uses: actions/checkout@v3
 
-    - name: Get dependencies
-      run: go get -v -t -d ./...
+      - name: Clean dependencies
+        run: go clean --modcache
 
-    - name: Run Tests
-      run: make test_unit_race
+      - name: Get dependencies
+        run: go mod tidy
 
+      - name: Run Tests
+        run: make test_unit_race
diff --git a/Makefile b/Makefile
index 92758806..4ffff95f 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
-MODULE = github.com/binance-chain/tss-lib
+MODULE = github.com/bnb-chain/tss-lib/v2
 PACKAGES = $(shell go list ./... | grep -v '/vendor/')
 
 all: protob test
@@ -8,7 +8,7 @@ all: protob test
 
 protob:
 	@echo "--> Building Protocol Buffers"
-	@for protocol in message signature ecdsa-keygen ecdsa-signing ecdsa-resharing; do \
+	@for protocol in message signature ecdsa-keygen ecdsa-signing ecdsa-resharing eddsa-keygen eddsa-signing eddsa-resharing; do \
 		echo "Generating $$protocol.pb.go" ; \
 		protoc --go_out=. ./protob/$$protocol.proto ; \
 	done
@@ -22,12 +22,14 @@ build: protob
 test_unit:
 	@echo "--> Running Unit Tests"
 	@echo "!!! WARNING: This will take a long time :)"
-	go test -timeout 20m $(PACKAGES)
+	go clean -testcache
+	go test -timeout 60m $(PACKAGES)
 
 test_unit_race:
 	@echo "--> Running Unit Tests (with Race Detection)"
 	@echo "!!! WARNING: This will take a long time :)"
-	go test -timeout 30m -race $(PACKAGES)
+	go clean -testcache
+	go test -timeout 60m -race $(PACKAGES)
 
 test:
 	make test_unit
diff --git a/README.md b/README.md
index a3ebf45e..c4411d96 100644
--- a/README.md
+++ b/README.md
@@ -3,10 +3,10 @@
 
 [1]: https://img.shields.io/badge/license-MIT-blue.svg
 [2]: LICENSE
-[3]: https://godoc.org/github.com/binance-chain/tss-lib?status.svg
-[4]: https://godoc.org/github.com/binance-chain/tss-lib
-[5]: https://goreportcard.com/badge/github.com/binance-chain/tss-lib
-[6]: https://goreportcard.com/report/github.com/binance-chain/tss-lib
+[3]: https://godoc.org/github.com/bnb-chain/tss-lib?status.svg
+[4]: https://godoc.org/github.com/bnb-chain/tss-lib
+[5]: https://goreportcard.com/badge/github.com/bnb-chain/tss-lib
+[6]: https://goreportcard.com/report/github.com/bnb-chain/tss-lib
 
 Permissively MIT Licensed.
 
@@ -43,12 +43,6 @@ The `LocalParty` that you use should be from the `keygen`, `signing` or `reshari
 
 ### Setup
 ```go
-// Set up elliptic curve
-// use ECDSA, which is used by default
-tss.SetCurve(s256k1.S256()) 
-// or use EdDSA
-// tss.SetCurve(edwards.Edwards()) 
-
 // When using the keygen party it is recommended that you pre-compute the "safe primes" and Paillier secret beforehand because this can take some time.
 // This code will generate those parameters using a concurrency limit equal to the number of available CPU cores.
 preParams, _ := keygen.GeneratePreParams(1 * time.Minute)
@@ -62,7 +56,14 @@ parties := tss.SortPartyIDs(getParticipantPartyIDs())
 // The `uniqueKey` is a unique identifying key for this peer (such as its p2p public key) as a big.Int.
 thisParty := tss.NewPartyID(id, moniker, uniqueKey)
 ctx := tss.NewPeerContext(parties)
-params := tss.NewParameters(ctx, thisParty, len(parties), threshold)
+
+// Select an elliptic curve
+// use ECDSA
+curve := tss.S256()
+// or use EdDSA
+// curve := tss.Edwards()
+
+params := tss.NewParameters(curve, ctx, thisParty, len(parties), threshold)
 
 // You should keep a local mapping of `id` strings to `*PartyID` instances so that an incoming message can have its origin party's `*PartyID` recovered for passing to `UpdateFromBytes` (see below)
 partyIDMap := make(map[string]*PartyID)
@@ -135,6 +136,10 @@ In a typical use case, it is expected that a transport implementation will consu
 
 This way there is no need to deal with Marshal/Unmarshalling Protocol Buffers to implement a transport.
 
+## Changes of Preparams of ECDSA in v2.0
+
+Two fields PaillierSK.P and PaillierSK.Q is added in version 2.0. They are used to generate Paillier key proofs. Key valuts generated from versions before 2.0 need to regenerate(resharing) the key valuts to update the praparams with the necessary fileds filled.
+
 ## How to use this securely
 
 ⚠️ This section is important. Be sure to read it!
@@ -150,7 +155,7 @@ Additionally, there should be a mechanism in your transport to allow for "reliab
 Timeouts and errors should be handled by your application. The method `WaitingFor` may be called on a `Party` to get the set of other parties that it is still waiting for messages from. You may also get the set of culprit parties that caused an error from a `*tss.Error`.
 
 ## Security Audit
-A full review of this library was carried out by Kudelski Security and their final report was made available in October, 2019. A copy of this report [`audit-binance-tss-lib-final-20191018.pdf`](https://github.com/binance-chain/tss-lib/releases/download/v1.0.0/audit-binance-tss-lib-final-20191018.pdf) may be found in the v1.0.0 release notes of this repository.
+A full review of this library was carried out by Kudelski Security and their final report was made available in October, 2019. A copy of this report [`audit-binance-tss-lib-final-20191018.pdf`](https://github.com/bnb-chain/tss-lib/releases/download/v1.0.0/audit-binance-tss-lib-final-20191018.pdf) may be found in the v1.0.0 release notes of this repository.
 
 ## References
 \[1\] https://eprint.iacr.org/2019/114.pdf
diff --git a/SECURITY.md b/SECURITY.md
new file mode 100644
index 00000000..16a6f256
--- /dev/null
+++ b/SECURITY.md
@@ -0,0 +1,11 @@
+# Security Policy
+
+## Reporting a Bug or Vulnerability
+
+For non-security problems please open an issue in this GitHub repository.
+
+If you find any security issues please send a report confidentially to https://bugcrowd.com/binance.
+
+Please include notes about the impact of the issue and a walkthrough on how it can be exploited.
+
+For severe security issues that completely breach the safety of the scheme or leak the secret shares we would be happy to reward you with a bounty based on the security impact and severity. Please include a link to this notice in your email.
diff --git a/common/hash.go b/common/hash.go
index 5edd33d4..2ffcec1e 100644
--- a/common/hash.go
+++ b/common/hash.go
@@ -35,11 +35,16 @@ func SHA512_256(in ...[]byte) []byte {
 	for _, bz := range in {
 		bzSize += len(bz)
 	}
-	data = make([]byte, 0, len(inLenBz)+bzSize+inLen)
+	dataCap := len(inLenBz) + bzSize + inLen + (inLen * 8)
+	data = make([]byte, 0, dataCap)
 	data = append(data, inLenBz...)
 	for _, bz := range in {
 		data = append(data, bz...)
 		data = append(data, hashInputDelimiter) // safety delimiter
+		dataLen := make([]byte, 8)              // 64-bits
+		binary.LittleEndian.PutUint64(dataLen, uint64(len(bz)))
+		data = append(data, dataLen...) // Security audit: length of each byte buffer should be added after
+		// each security delimiters in order to enforce proper domain separation
 	}
 	// n < len(data) or an error will never happen.
 	// see: https://golang.org/pkg/hash/#Hash and https://github.com/golang/go/wiki/Hashing#the-hashhash-interface
@@ -68,11 +73,16 @@ func SHA512_256i(in ...*big.Int) *big.Int {
 		ptrs[i] = n.Bytes()
 		bzSize += len(ptrs[i])
 	}
-	data = make([]byte, 0, len(inLenBz)+bzSize+inLen)
+	dataCap := len(inLenBz) + bzSize + inLen + (inLen * 8)
+	data = make([]byte, 0, dataCap)
 	data = append(data, inLenBz...)
 	for i := range in {
 		data = append(data, ptrs[i]...)
 		data = append(data, hashInputDelimiter) // safety delimiter
+		dataLen := make([]byte, 8)              // 64-bits
+		binary.LittleEndian.PutUint64(dataLen, uint64(len(ptrs[i])))
+		data = append(data, dataLen...) // Security audit: length of each byte buffer should be added after
+		// each security delimiters in order to enforce proper domain separation
 	}
 	// n < len(data) or an error will never happen.
 	// see: https://golang.org/pkg/hash/#Hash and https://github.com/golang/go/wiki/Hashing#the-hashhash-interface
@@ -83,6 +93,52 @@ func SHA512_256i(in ...*big.Int) *big.Int {
 	return new(big.Int).SetBytes(state.Sum(nil))
 }
 
+// SHA512_256i_TAGGED tagged version of SHA512_256i
+func SHA512_256i_TAGGED(tag []byte, in ...*big.Int) *big.Int {
+	tagBz := SHA512_256(tag)
+	var data []byte
+	state := crypto.SHA512_256.New()
+	state.Write(tagBz)
+	state.Write(tagBz)
+	inLen := len(in)
+	if inLen == 0 {
+		return nil
+	}
+	bzSize := 0
+	// prevent hash collisions with this prefix containing the block count
+	inLenBz := make([]byte, 64/8)
+	// converting between int and uint64 doesn't change the sign bit, but it may be interpreted as a larger value.
+	// this prefix is never read/interpreted, so that doesn't matter.
+	binary.LittleEndian.PutUint64(inLenBz, uint64(inLen))
+	ptrs := make([][]byte, inLen)
+	for i, n := range in {
+		if n == nil {
+			ptrs[i] = zero.Bytes()
+		} else {
+			ptrs[i] = n.Bytes()
+		}
+		bzSize += len(ptrs[i])
+	}
+	dataCap := len(inLenBz) + bzSize + inLen + (inLen * 8)
+	data = make([]byte, 0, dataCap)
+	data = append(data, inLenBz...)
+	for i := range in {
+		data = append(data, ptrs[i]...)
+		data = append(data, hashInputDelimiter) // safety delimiter
+		dataLen := make([]byte, 8)              // 64-bits
+		binary.LittleEndian.PutUint64(dataLen, uint64(len(ptrs[i])))
+		data = append(data, dataLen...) // Security audit: length of each byte buffer should be added after
+		// each security delimiters in order to enforce proper domain separation
+	}
+	// n < len(data) or an error will never happen.
+	// see: https://golang.org/pkg/hash/#Hash and https://github.com/golang/go/wiki/Hashing#the-hashhash-interface
+	if _, err := state.Write(data); err != nil {
+		Logger.Error(err)
+		return nil
+	}
+	return new(big.Int).SetBytes(state.Sum(nil))
+}
+
 func SHA512_256iOne(in *big.Int) *big.Int {
 	var data []byte
 	state := crypto.SHA512_256.New()
diff --git a/common/hash_utils_test.go b/common/hash_utils_test.go
index 1a07f0d7..c0fdce2c 100644
--- a/common/hash_utils_test.go
+++ b/common/hash_utils_test.go
@@ -11,7 +11,7 @@ import (
 	"reflect"
 	"testing"
 
-	"github.com/binance-chain/tss-lib/common"
+	"github.com/bnb-chain/tss-lib/v2/common"
 )
 
 func TestRejectionSample(t *testing.T) {
diff --git a/common/int.go b/common/int.go
index 5a951c09..54c798cd 100644
--- a/common/int.go
+++ b/common/int.go
@@ -58,3 +58,14 @@ func (mi *modInt) ModInverse(g *big.Int) *big.Int {
 func (mi *modInt) i() *big.Int {
 	return (*big.Int)(mi)
 }
+
+func IsInInterval(b *big.Int, bound *big.Int) bool {
+	return b.Cmp(bound) == -1 && b.Cmp(zero) >= 0
+}
+
+func AppendBigIntToBytesSlice(commonBytes []byte, appended *big.Int) []byte {
+	resultBytes := make([]byte, len(commonBytes), len(commonBytes)+len(appended.Bytes()))
+	copy(resultBytes, commonBytes)
+	resultBytes = append(resultBytes, appended.Bytes()...)
+	return resultBytes
+}
diff --git a/common/random.go b/common/random.go
index 24a8d7c7..333cf549 100644
--- a/common/random.go
+++ b/common/random.go
@@ -92,11 +92,38 @@ func IsNumberInMultiplicativeGroup(n, v *big.Int) bool {
 		gcd.GCD(nil, nil, v, n).Cmp(one) == 0
 }
 
-//  Return a random generator of RQn with high probability.
-//  THIS METHOD ONLY WORKS IF N IS THE PRODUCT OF TWO SAFE PRIMES!
+//	Return a random generator of RQn with high probability.
+//	THIS METHOD ONLY WORKS IF N IS THE PRODUCT OF TWO SAFE PRIMES!
+//
 // https://github.com/didiercrunch/paillier/blob/d03e8850a8e4c53d04e8016a2ce8762af3278b71/utils.go#L39
 func GetRandomGeneratorOfTheQuadraticResidue(n *big.Int) *big.Int {
 	f := GetRandomPositiveRelativelyPrimeInt(n)
 	fSq := new(big.Int).Mul(f, f)
 	return fSq.Mod(fSq, n)
 }
+
+// GetRandomQuadraticNonResidue returns a quadratic non residue of odd n.
+func GetRandomQuadraticNonResidue(n *big.Int) *big.Int {
+	for {
+		w := GetRandomPositiveInt(n)
+		if big.Jacobi(w, n) == -1 {
+			return w
+		}
+	}
+}
+
+// GetRandomBytes returns random bytes of length.
+func GetRandomBytes(length int) ([]byte, error) {
+	// Per [BIP32], the seed must be in range [MinSeedBytes, MaxSeedBytes].
+	if length <= 0 {
+		return nil, errors.New("invalid length")
+	}
+
+	buf := make([]byte, length)
+	_, err := rand.Read(buf)
+	if err != nil {
+		return nil, err
+	}
+
+	return buf, nil
+}
diff --git a/common/random_test.go b/common/random_test.go
index 8d7b779b..b7ca5f95 100644
--- a/common/random_test.go
+++ b/common/random_test.go
@@ -12,7 +12,7 @@ import (
 
 	"github.com/stretchr/testify/assert"
 
-	"github.com/binance-chain/tss-lib/common"
+	"github.com/bnb-chain/tss-lib/v2/common"
 )
 
 const (
diff --git a/common/safe_prime.go b/common/safe_prime.go
index 6e94ea68..fad2d1f1 100644
--- a/common/safe_prime.go
+++ b/common/safe_prime.go
@@ -15,7 +15,6 @@ import (
 	"math/big"
 	"sync"
 	"sync/atomic"
-	"time"
 )
 
 const (
@@ -96,10 +95,15 @@ var smallPrimes = []uint8{
 // operations.
 var smallPrimesProduct = new(big.Int).SetUint64(16294579238595022365)
 
+// ErrGeneratorCancelled is an error returned from GetRandomSafePrimesConcurrent
+// when the work of the generator has been cancelled as a result of the context
+// being done (cancellation or timeout).
+var ErrGeneratorCancelled = fmt.Errorf("generator work cancelled")
+
 // GetRandomSafePrimesConcurrent tries to find safe primes concurrently.
 // The returned results are safe primes `p` and prime `q` such that `p=2q+1`.
 // Concurrency level can be controlled with the `concurrencyLevel` parameter.
-// If a safe prime could not be found in the specified `timeout`, the error
+// If a safe prime could not be found before the context is done, the error
 // is returned. Also, if at least one search process failed, error is returned
 // as well.
 //
@@ -121,7 +125,7 @@ var smallPrimesProduct = new(big.Int).SetUint64(16294579238595022365)
 // This function generates safe primes of at least 6 `bitLen`. For every
 // generated safe prime, the two most significant bits are always set to `1`
 // - we don't want the generated number to be too small.
-func GetRandomSafePrimesConcurrent(bitLen, numPrimes int, timeout time.Duration, concurrency int) ([]*GermainSafePrime, error) {
+func GetRandomSafePrimesConcurrent(ctx context.Context, bitLen, numPrimes int, concurrency int) ([]*GermainSafePrime, error) {
 	if bitLen < 6 {
 		return nil, errors.New("safe prime size must be at least 6 bits")
 	}
@@ -139,35 +143,28 @@ func GetRandomSafePrimesConcurrent(bitLen, numPrimes int, timeout time.Duration,
 	defer close(errCh)
 	defer waitGroup.Wait()
 
-	ctx, cancel := context.WithCancel(context.Background())
+	generatorCtx, cancelGeneratorCtx := context.WithCancel(ctx)
+	defer cancelGeneratorCtx()
 
 	for i := 0; i < concurrency; i++ {
 		waitGroup.Add(1)
 		runGenPrimeRoutine(
-			ctx, primeCh, errCh, waitGroup, rand.Reader, bitLen,
+			generatorCtx, primeCh, errCh, waitGroup, rand.Reader, bitLen,
 		)
 	}
 
-	// Cancel after the specified timeout.
-	go func() {
-		time.Sleep(timeout)
-		cancel()
-	}()
-
 	needed := int32(numPrimes)
 	for {
 		select {
 		case result := <-primeCh:
 			primes = append(primes, result)
 			if atomic.AddInt32(&needed, -1) <= 0 {
-				cancel()
 				return primes[:numPrimes], nil
 			}
 		case err := <-errCh:
-			cancel()
 			return nil, err
 		case <-ctx.Done():
-			return nil, fmt.Errorf("generator timed out after %v", timeout)
+			return nil, ErrGeneratorCancelled
 		}
 	}
 }
diff --git a/common/safe_prime_test.go b/common/safe_prime_test.go
index f2042e86..083c736b 100644
--- a/common/safe_prime_test.go
+++ b/common/safe_prime_test.go
@@ -7,6 +7,7 @@
 package common
 
 import (
+	"context"
 	"math/big"
 	"runtime"
 	"testing"
@@ -42,7 +43,9 @@ func Test_Validate_Bad(t *testing.T) {
 }
 
 func TestGetRandomGermainPrimeConcurrent(t *testing.T) {
-	sgps, err := GetRandomSafePrimesConcurrent(1024, 2, 20*time.Minute, runtime.NumCPU())
+	ctx, cancel := context.WithTimeout(context.Background(), 20*time.Minute)
+	defer cancel()
+	sgps, err := GetRandomSafePrimesConcurrent(ctx, 1024, 2, runtime.NumCPU())
 	assert.NoError(t, err)
 	assert.Equal(t, 2, len(sgps))
 	for _, sgp := range sgps {
diff --git a/common/signature.pb.go b/common/signature.pb.go
index 43049d2d..f1e802ac 100644
--- a/common/signature.pb.go
+++ b/common/signature.pb.go
@@ -1,28 +1,38 @@
+// Copyright © 2019 Binance
+//
+// This file is part of Binance. The full Binance copyright notice, including
+// terms governing use, modification, and redistribution, is contained in the
+// file LICENSE at the root of the source code distribution tree.
+
 // Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.27.1
+// 	protoc        v3.14.0
 // source: protob/signature.proto
 
 package common
 
 import (
-	fmt "fmt"
-	proto "github.com/golang/protobuf/proto"
-	math "math"
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
 )
 
-// Reference imports to suppress errors if they are not otherwise used.
-var _ = proto.Marshal
-var _ = fmt.Errorf
-var _ = math.Inf
-
-// This is a compile-time assertion to ensure that this generated file
-// is compatible with the proto package it is being compiled against.
-// A compilation error at this line likely means your copy of the
-// proto package needs to be updated.
-const _ = proto.ProtoPackageIsVersion3 // please upgrade the proto package
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
 
 //
 // Container for output signatures, mostly used for marshalling this data structure to a mobile app
 type SignatureData struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
 	Signature []byte `protobuf:"bytes,1,opt,name=signature,proto3" json:"signature,omitempty"`
 	// Ethereum-style recovery byte; only the first byte is relevant
 	SignatureRecovery []byte `protobuf:"bytes,2,opt,name=signature_recovery,json=signatureRecovery,proto3" json:"signature_recovery,omitempty"`
@@ -30,87 +40,153 @@ type SignatureData struct {
 	R []byte `protobuf:"bytes,3,opt,name=r,proto3" json:"r,omitempty"`
 	S []byte `protobuf:"bytes,4,opt,name=s,proto3" json:"s,omitempty"`
 	// M represents the original message digest that was signed M
-	M                    []byte   `protobuf:"bytes,5,opt,name=m,proto3" json:"m,omitempty"`
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
+	M []byte `protobuf:"bytes,5,opt,name=m,proto3" json:"m,omitempty"`
 }
 
-func (m *SignatureData) Reset()         { *m = SignatureData{} }
-func (m *SignatureData) String() string { return proto.CompactTextString(m) }
-func (*SignatureData) ProtoMessage()    {}
-func (*SignatureData) Descriptor() ([]byte, []int) {
-	return fileDescriptor_a73ad5e44f61b3fb, []int{0}
+func (x *SignatureData) Reset() {
+	*x = SignatureData{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_protob_signature_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
 }
 
-func (m *SignatureData) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_SignatureData.Unmarshal(m, b)
-}
-func (m *SignatureData) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_SignatureData.Marshal(b, m, deterministic)
-}
-func (m *SignatureData) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_SignatureData.Merge(m, src)
+func (x *SignatureData) String() string {
+	return protoimpl.X.MessageStringOf(x)
 }
-func (m *SignatureData) XXX_Size() int {
-	return xxx_messageInfo_SignatureData.Size(m)
-}
-func (m *SignatureData) XXX_DiscardUnknown() {
-	xxx_messageInfo_SignatureData.DiscardUnknown(m)
+
+func (*SignatureData) ProtoMessage() {}
+
+func (x *SignatureData) ProtoReflect() protoreflect.Message {
+	mi := &file_protob_signature_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
 }
 
-var xxx_messageInfo_SignatureData proto.InternalMessageInfo
+// Deprecated: Use SignatureData.ProtoReflect.Descriptor instead.
+func (*SignatureData) Descriptor() ([]byte, []int) {
+	return file_protob_signature_proto_rawDescGZIP(), []int{0}
+}
 
-func (m *SignatureData) GetSignature() []byte {
-	if m != nil {
-		return m.Signature
+func (x *SignatureData) GetSignature() []byte {
+	if x != nil {
+		return x.Signature
 	}
 	return nil
 }
 
-func (m *SignatureData) GetSignatureRecovery() []byte {
-	if m != nil {
-		return m.SignatureRecovery
+func (x *SignatureData) GetSignatureRecovery() []byte {
+	if x != nil {
+		return x.SignatureRecovery
 	}
 	return nil
 }
 
-func (m *SignatureData) GetR() []byte {
-	if m != nil {
-		return m.R
+func (x *SignatureData) GetR() []byte {
+	if x != nil {
+		return x.R
 	}
 	return nil
 }
 
-func (m *SignatureData) GetS() []byte {
-	if m != nil {
-		return m.S
+func (x *SignatureData) GetS() []byte {
+	if x != nil {
+		return x.S
 	}
 	return nil
 }
 
-func (m *SignatureData) GetM() []byte {
-	if m != nil {
-		return m.M
+func (x *SignatureData) GetM() []byte {
+	if x != nil {
+		return x.M
 	}
 	return nil
 }
 
-func init() {
-	proto.RegisterType((*SignatureData)(nil), "SignatureData")
+var File_protob_signature_proto protoreflect.FileDescriptor
+
+var file_protob_signature_proto_rawDesc = []byte{
+	0x0a, 0x16, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x62, 0x2f, 0x73, 0x69, 0x67, 0x6e, 0x61, 0x74, 0x75,
+	0x72, 0x65, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x12, 0x0e, 0x62, 0x69, 0x6e, 0x61, 0x6e, 0x63,
+	0x65, 0x2e, 0x74, 0x73, 0x73, 0x6c, 0x69, 0x62, 0x22, 0x86, 0x01, 0x0a, 0x0d, 0x53, 0x69, 0x67,
+	0x6e, 0x61, 0x74, 0x75, 0x72, 0x65, 0x44, 0x61, 0x74, 0x61, 0x12, 0x1c, 0x0a, 0x09, 0x73, 0x69,
+	0x67, 0x6e, 0x61, 0x74, 0x75, 0x72, 0x65, 0x18, 0x01, 0x20, 0x01, 0x28, 0x0c, 0x52, 0x09, 0x73,
+	0x69, 0x67, 0x6e, 0x61, 0x74, 0x75, 0x72, 0x65, 0x12, 0x2d, 0x0a, 0x12, 0x73, 0x69, 0x67, 0x6e,
+	0x61, 0x74, 0x75, 0x72, 0x65, 0x5f, 0x72, 0x65, 0x63, 0x6f, 0x76, 0x65, 0x72, 0x79, 0x18, 0x02,
+	0x20, 0x01, 0x28, 0x0c, 0x52, 0x11, 0x73, 0x69, 0x67, 0x6e, 0x61, 0x74, 0x75, 0x72, 0x65, 0x52,
+	0x65, 0x63, 0x6f, 0x76, 0x65, 0x72, 0x79, 0x12, 0x0c, 0x0a, 0x01, 0x72, 0x18, 0x03, 0x20, 0x01,
+	0x28, 0x0c, 0x52, 0x01, 0x72, 0x12, 0x0c, 0x0a, 0x01, 0x73, 0x18, 0x04, 0x20, 0x01, 0x28, 0x0c,
+	0x52, 0x01, 0x73, 0x12, 0x0c, 0x0a, 0x01, 0x6d, 0x18, 0x05, 0x20, 0x01, 0x28, 0x0c, 0x52, 0x01,
+	0x6d, 0x42, 0x0a, 0x5a, 0x08, 0x2e, 0x2f, 0x63, 0x6f, 0x6d, 0x6d, 0x6f, 0x6e, 0x62, 0x06, 0x70,
+	0x72, 0x6f, 0x74, 0x6f, 0x33,
+}
+
+var (
+	file_protob_signature_proto_rawDescOnce sync.Once
+	file_protob_signature_proto_rawDescData = file_protob_signature_proto_rawDesc
+)
+
+func file_protob_signature_proto_rawDescGZIP() []byte {
+	file_protob_signature_proto_rawDescOnce.Do(func() {
+		file_protob_signature_proto_rawDescData = protoimpl.X.CompressGZIP(file_protob_signature_proto_rawDescData)
+	})
+	return file_protob_signature_proto_rawDescData
+}
+
+var file_protob_signature_proto_msgTypes = make([]protoimpl.MessageInfo, 1)
+var file_protob_signature_proto_goTypes = []interface{}{
+	(*SignatureData)(nil), // 0: binance.tsslib.SignatureData
+}
+var file_protob_signature_proto_depIdxs = []int32{
+	0, // [0:0] is the sub-list for method output_type
+	0, // [0:0] is the sub-list for method input_type
+	0, // [0:0] is the sub-list for extension type_name
+	0, // [0:0] is the sub-list for extension extendee
+	0, // [0:0] is the sub-list for field type_name
 }
 
-func init() { proto.RegisterFile("protob/signature.proto", fileDescriptor_a73ad5e44f61b3fb) }
-
-var fileDescriptor_a73ad5e44f61b3fb = []byte{
-	// 139 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0x12, 0x2b, 0x28, 0xca, 0x2f,
-	0xc9, 0x4f, 0xd2, 0x2f, 0xce, 0x4c, 0xcf, 0x4b, 0x2c, 0x29, 0x2d, 0x4a, 0xd5, 0x03, 0x0b, 0x28,
-	0xb5, 0x31, 0x72, 0xf1, 0x06, 0xc3, 0xc4, 0x5c, 0x12, 0x4b, 0x12, 0x85, 0x64, 0xb8, 0x38, 0xe1,
-	0x8a, 0x24, 0x18, 0x15, 0x18, 0x35, 0x78, 0x82, 0x10, 0x02, 0x42, 0xba, 0x5c, 0x42, 0x70, 0x4e,
-	0x7c, 0x51, 0x6a, 0x72, 0x7e, 0x59, 0x6a, 0x51, 0xa5, 0x04, 0x13, 0x58, 0x99, 0x20, 0x5c, 0x26,
-	0x08, 0x2a, 0x21, 0xc4, 0xc3, 0xc5, 0x58, 0x24, 0xc1, 0x0c, 0x96, 0x65, 0x2c, 0x02, 0xf1, 0x8a,
-	0x25, 0x58, 0x20, 0xbc, 0x62, 0x10, 0x2f, 0x57, 0x82, 0x15, 0xc2, 0xcb, 0x75, 0xe2, 0x8a, 0xe2,
-	0xd0, 0xd3, 0x4f, 0xce, 0xcf, 0xcd, 0xcd, 0xcf, 0x4b, 0x62, 0x03, 0xbb, 0xcd, 0x18, 0x10, 0x00,
-	0x00, 0xff, 0xff, 0x99, 0x1e, 0xab, 0x5b, 0xb5, 0x00, 0x00, 0x00,
+func init() { file_protob_signature_proto_init() }
+func file_protob_signature_proto_init() {
+	if File_protob_signature_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_protob_signature_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*SignatureData); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_protob_signature_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   1,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_protob_signature_proto_goTypes,
+		DependencyIndexes: file_protob_signature_proto_depIdxs,
+		MessageInfos:      file_protob_signature_proto_msgTypes,
+	}.Build()
+	File_protob_signature_proto = out.File
+	file_protob_signature_proto_rawDesc = nil
+	file_protob_signature_proto_goTypes = nil
+	file_protob_signature_proto_depIdxs = nil
 }
diff --git a/common/slice.go b/common/slice.go
index 28aafd31..d40a9480 100644
--- a/common/slice.go
+++ b/common/slice.go
@@ -50,3 +50,15 @@ func NonEmptyMultiBytes(bzs [][]byte, expectLen ...int) bool {
 	}
 	return true
 }
+
+// PadToLengthBytesInPlace pad {0, ...} to the front of src if len(src) < length
+// output length is equal to the parameter length
+func PadToLengthBytesInPlace(src []byte, length int) []byte {
+	oriLen := len(src)
+	if oriLen < length {
+		for i := 0; i < length-oriLen; i++ {
+			src = append([]byte{0}, src...)
+		}
+	}
+	return src
+}
diff --git a/crypto/ckd/child_key_derivation.go b/crypto/ckd/child_key_derivation.go
new file mode 100644
index 00000000..422cffed
--- /dev/null
+++ b/crypto/ckd/child_key_derivation.go
@@ -0,0 +1,259 @@
+// Copyright © Swingby
+
+package ckd
+
+import (
+	"bytes"
+	"crypto/ecdsa"
+	"crypto/elliptic"
+	"crypto/hmac"
+	"crypto/sha256"
+	"crypto/sha512"
+	"encoding/binary"
+	"errors"
+	"hash"
+	"math/big"
+
+	"github.com/bnb-chain/tss-lib/v2/common"
+	"github.com/bnb-chain/tss-lib/v2/crypto"
+	"github.com/btcsuite/btcd/btcec/v2"
+	"github.com/btcsuite/btcutil/base58"
+	"golang.org/x/crypto/ripemd160"
+)
+
+type ExtendedKey struct {
+	ecdsa.PublicKey
+	Depth      uint8
+	ChildIndex uint32
+	ChainCode  []byte // 32 bytes
+	ParentFP   []byte // parent fingerprint
+	Version    []byte
+}
+
+// For more information about child key derivation see https://github.com/binance-chain/tss-lib/issues/104
+// https://github.com/bitcoin/bips/blob/master/bip-0032.mediawiki .
+// The functions below do not implement the full BIP-32 specification. As mentioned in the Jira ticket above,
+// we only use non-hardened derived keys.
+
+const (
+
+	// HardenedKeyStart hardened key starts.
+	HardenedKeyStart = 0x80000000 // 2^31
+
+	// max Depth
+	maxDepth = 1<<8 - 1
+
+	PubKeyBytesLenCompressed = 33
+
+	pubKeyCompressed byte = 0x2
+
+	serializedKeyLen = 78
+
+	// MinSeedBytes is the minimum number of bytes allowed for a seed to
+	// a master node.
+	MinSeedBytes = 16 // 128 bits
+
+	// MaxSeedBytes is the maximum number of bytes allowed for a seed to
+	// a master node.
+	MaxSeedBytes = 64 // 512 bits
+)
+
+// Extended public key serialization, defined in BIP32
+func (k *ExtendedKey) String() string {
+	// version(4) || depth(1) || parentFP (4) || childinde(4) || chaincode (32) || key(33) || checksum(4)
+	var childNumBytes [4]byte
+	binary.BigEndian.PutUint32(childNumBytes[:], k.ChildIndex)
+
+	serializedBytes := make([]byte, 0, serializedKeyLen+4)
+	serializedBytes = append(serializedBytes, k.Version...)
+	serializedBytes = append(serializedBytes, k.Depth)
+	serializedBytes = append(serializedBytes, k.ParentFP...)
+	serializedBytes = append(serializedBytes, childNumBytes[:]...)
+	serializedBytes = append(serializedBytes, k.ChainCode...)
+	pubKeyBytes := serializeCompressed(k.PublicKey.X, k.PublicKey.Y)
+	serializedBytes = append(serializedBytes, pubKeyBytes...)
+
+	checkSum := doubleHashB(serializedBytes)[:4]
+	serializedBytes = append(serializedBytes, checkSum...)
+	return base58.Encode(serializedBytes)
+}
+
+// NewExtendedKeyFromString returns a new extended key from a base58-encoded extended key
+func NewExtendedKeyFromString(key string, curve elliptic.Curve) (*ExtendedKey, error) {
+	// version(4) || depth(1) || parentFP (4) || childinde(4) || chaincode (32) || key(33) || checksum(4)
+
+	decoded := base58.Decode(key)
+	if len(decoded) != serializedKeyLen+4 {
+		return nil, errors.New("invalid extended key")
+	}
+
+	// Split the payload and checksum up and ensure the checksum matches.
+	payload := decoded[:len(decoded)-4]
+	checkSum := decoded[len(decoded)-4:]
+	expectedCheckSum := doubleHashB(payload)[:4]
+	if !bytes.Equal(checkSum, expectedCheckSum) {
+		return nil, errors.New("invalid extended key")
+	}
+
+	// Deserialize each of the payload fields.
+	version := payload[:4]
+	depth := payload[4:5][0]
+	parentFP := payload[5:9]
+	childNum := binary.BigEndian.Uint32(payload[9:13])
+	chainCode := payload[13:45]
+	keyData := payload[45:78]
+
+	var pubKey ecdsa.PublicKey
+
+	if c, ok := curve.(*btcec.KoblitzCurve); ok {
+		pk, err := btcec.ParsePubKey(keyData)
+		if err != nil {
+			return nil, err
+		}
+		pubKey = ecdsa.PublicKey{
+			Curve: c,
+			X:     pk.X(),
+			Y:     pk.Y(),
+		}
+	} else {
+		px, py := elliptic.Unmarshal(curve, keyData)
+		pubKey = ecdsa.PublicKey{
+			Curve: curve,
+			X:     px,
+			Y:     py,
+		}
+	}
+
+	return &ExtendedKey{
+		PublicKey:  pubKey,
+		Depth:      depth,
+		ChildIndex: childNum,
+		ChainCode:  chainCode,
+		ParentFP:   parentFP,
+		Version:    version,
+	}, nil
+}
+
+func doubleHashB(b []byte) []byte {
+	first := sha256.Sum256(b)
+	second := sha256.Sum256(first[:])
+	return second[:]
+}
+
+func calcHash(buf []byte, hasher hash.Hash) []byte {
+	hasher.Write(buf)
+	return hasher.Sum(nil)
+}
+
+func hash160(buf []byte) []byte {
+	return calcHash(calcHash(buf, sha256.New()), ripemd160.New())
+}
+
+func isOdd(a *big.Int) bool {
+	return a.Bit(0) == 1
+}
+
+// PaddedAppend append src to dst, if less than size padding 0 at start
+func paddedAppend(dst []byte, srcPaddedSize int, src []byte) []byte {
+	return append(dst, paddedBytes(srcPaddedSize, src)...)
+}
+
+// PaddedBytes padding byte array to size length
+func paddedBytes(size int, src []byte) []byte {
+	offset := size - len(src)
+	tmp := src
+	if offset > 0 {
+		tmp = make([]byte, size)
+		copy(tmp[offset:], src)
+	}
+	return tmp
+}
+
+// SerializeCompressed serializes a public key 33-byte compressed format
+func serializeCompressed(publicKeyX *big.Int, publicKeyY *big.Int) []byte {
+	b := make([]byte, 0, PubKeyBytesLenCompressed)
+	format := pubKeyCompressed
+	if isOdd(publicKeyY) {
+		format |= 0x1
+	}
+	b = append(b, format)
+	return paddedAppend(b, 32, publicKeyX.Bytes())
+}
+
+func DeriveChildKeyFromHierarchy(indicesHierarchy []uint32, pk *ExtendedKey, mod *big.Int, curve elliptic.Curve) (*big.Int, *ExtendedKey, error) {
+	var k = pk
+	var err error
+	var childKey *ExtendedKey
+	mod_ := common.ModInt(mod)
+	ilNum := big.NewInt(0)
+	for index := range indicesHierarchy {
+		ilNumOld := ilNum
+		ilNum, childKey, err = DeriveChildKey(indicesHierarchy[index], k, curve)
+		if err != nil {
+			return nil, nil, err
+		}
+		k = childKey
+		ilNum = mod_.Add(ilNum, ilNumOld)
+	}
+	return ilNum, k, nil
+}
+
+// DeriveChildKey Derive a child key from the given parent key. The function returns "IL" ("I left"), per BIP-32 spec. It also
+// returns the derived child key.
+func DeriveChildKey(index uint32, pk *ExtendedKey, curve elliptic.Curve) (*big.Int, *ExtendedKey, error) {
+	if index >= HardenedKeyStart {
+		return nil, nil, errors.New("the index must be non-hardened")
+	}
+	if pk.Depth == maxDepth {
+		return nil, nil, errors.New("cannot derive key beyond max depth")
+	}
+
+	cryptoPk, err := crypto.NewECPoint(curve, pk.X, pk.Y)
+	if err != nil {
+		common.Logger.Error("error getting pubkey from extendedkey")
+		return nil, nil, err
+	}
+
+	pkPublicKeyBytes := serializeCompressed(pk.X, pk.Y)
+
+	data := make([]byte, 37)
+	copy(data, pkPublicKeyBytes)
+	binary.BigEndian.PutUint32(data[33:], index)
+
+	// I = HMAC-SHA512(Key = chainCode, Data=data)
+	hmac512 := hmac.New(sha512.New, pk.ChainCode)
+	hmac512.Write(data)
+	ilr := hmac512.Sum(nil)
+	il := ilr[:32]
+	childChainCode := ilr[32:]
+	ilNum := new(big.Int).SetBytes(il)
+
+	if ilNum.Cmp(curve.Params().N) >= 0 || ilNum.Sign() == 0 {
+		// falling outside of the valid range for curve private keys
+		err = errors.New("invalid derived key")
+		common.Logger.Error("error deriving child key")
+		return nil, nil, err
+	}
+
+	deltaG := crypto.ScalarBaseMult(curve, ilNum)
+	if deltaG.X().Sign() == 0 || deltaG.Y().Sign() == 0 {
+		err = errors.New("invalid child")
+		common.Logger.Error("error invalid child")
+		return nil, nil, err
+	}
+	childCryptoPk, err := cryptoPk.Add(deltaG)
+	if err != nil {
+		common.Logger.Error("error adding delta G to parent key")
+		return nil, nil, err
+	}
+
+	childPk := &ExtendedKey{
+		PublicKey:  *childCryptoPk.ToECDSAPubKey(),
+		Depth:      pk.Depth + 1,
+		ChildIndex: index,
+		ChainCode:  childChainCode,
+		ParentFP:   hash160(pkPublicKeyBytes)[:4],
+		Version:    pk.Version,
+	}
+	return ilNum, childPk, nil
+}
diff --git a/crypto/ckd/child_key_derivation_test.go b/crypto/ckd/child_key_derivation_test.go
new file mode 100644
index 00000000..6511e4ef
--- /dev/null
+++ b/crypto/ckd/child_key_derivation_test.go
@@ -0,0 +1,132 @@
+// Copyright © 2019 Binance
+//
+// This file is part of Binance. The full Binance copyright notice, including
+// terms governing use, modification, and redistribution, is contained in the
+// file LICENSE at the root of the source code distribution tree.
+
+package ckd_test
+
+import (
+	"testing"
+
+	. "github.com/bnb-chain/tss-lib/v2/crypto/ckd"
+	"github.com/btcsuite/btcd/btcec/v2"
+)
+
+func TestPublicDerivation(t *testing.T) {
+	// port from https://github.com/btcsuite/btcutil/blob/master/hdkeychain/extendedkey_test.go
+	// The public extended keys for test vectors in [BIP32].
+	testVec1MasterPubKey := "xpub661MyMwAqRbcFtXgS5sYJABqqG9YLmC4Q1Rdap9gSE8NqtwybGhePY2gZ29ESFjqJoCu1Rupje8YtGqsefD265TMg7usUDFdp6W1EGMcet8"
+	testVec2MasterPubKey := "xpub661MyMwAqRbcFW31YEwpkMuc5THy2PSt5bDMsktWQcFF8syAmRUapSCGu8ED9W6oDMSgv6Zz8idoc4a6mr8BDzTJY47LJhkJ8UB7WEGuduB"
+
+	tests := []struct {
+		name    string
+		master  string
+		path    []uint32
+		wantPub string
+	}{
+		// Test vector 1
+		{
+			name:    "test vector 1 chain m",
+			master:  testVec1MasterPubKey,
+			path:    []uint32{},
+			wantPub: "xpub661MyMwAqRbcFtXgS5sYJABqqG9YLmC4Q1Rdap9gSE8NqtwybGhePY2gZ29ESFjqJoCu1Rupje8YtGqsefD265TMg7usUDFdp6W1EGMcet8",
+		},
+		{
+			name:    "test vector 1 chain m/0",
+			master:  testVec1MasterPubKey,
+			path:    []uint32{0},
+			wantPub: "xpub68Gmy5EVb2BdFbj2LpWrk1M7obNuaPTpT5oh9QCCo5sRfqSHVYWex97WpDZzszdzHzxXDAzPLVSwybe4uPYkSk4G3gnrPqqkV9RyNzAcNJ1",
+		},
+		{
+			name:    "test vector 1 chain m/0/1",
+			master:  testVec1MasterPubKey,
+			path:    []uint32{0, 1},
+			wantPub: "xpub6AvUGrnEpfvJBbfx7sQ89Q8hEMPM65UteqEX4yUbUiES2jHfjexmfJoxCGSwFMZiPBaKQT1RiKWrKfuDV4vpgVs4Xn8PpPTR2i79rwHd4Zr",
+		},
+		{
+			name:    "test vector 1 chain m/0/1/2",
+			master:  testVec1MasterPubKey,
+			path:    []uint32{0, 1, 2},
+			wantPub: "xpub6BqyndF6rhZqmgktFCBcapkwubGxPqoAZtQaYewJHXVKZcLdnqBVC8N6f6FSHWUghjuTLeubWyQWfJdk2G3tGgvgj3qngo4vLTnnSjAZckv",
+		},
+		{
+			name:    "test vector 1 chain m/0/1/2/2",
+			master:  testVec1MasterPubKey,
+			path:    []uint32{0, 1, 2, 2},
+			wantPub: "xpub6FHUhLbYYkgFQiFrDiXRfQFXBB2msCxKTsNyAExi6keFxQ8sHfwpogY3p3s1ePSpUqLNYks5T6a3JqpCGszt4kxbyq7tUoFP5c8KWyiDtPp",
+		},
+		{
+			name:    "test vector 1 chain m/0/1/2/2/1000000000",
+			master:  testVec1MasterPubKey,
+			path:    []uint32{0, 1, 2, 2, 1000000000},
+			wantPub: "xpub6GX3zWVgSgPc5tgjE6ogT9nfwSADD3tdsxpzd7jJoJMqSY12Be6VQEFwDCp6wAQoZsH2iq5nNocHEaVDxBcobPrkZCjYW3QUmoDYzMFBDu9",
+		},
+
+		// Test vector 2
+		{
+			name:    "test vector 2 chain m",
+			master:  testVec2MasterPubKey,
+			path:    []uint32{},
+			wantPub: "xpub661MyMwAqRbcFW31YEwpkMuc5THy2PSt5bDMsktWQcFF8syAmRUapSCGu8ED9W6oDMSgv6Zz8idoc4a6mr8BDzTJY47LJhkJ8UB7WEGuduB",
+		},
+		{
+			name:    "test vector 2 chain m/0",
+			master:  testVec2MasterPubKey,
+			path:    []uint32{0},
+			wantPub: "xpub69H7F5d8KSRgmmdJg2KhpAK8SR3DjMwAdkxj3ZuxV27CprR9LgpeyGmXUbC6wb7ERfvrnKZjXoUmmDznezpbZb7ap6r1D3tgFxHmwMkQTPH",
+		},
+		{
+			name:    "test vector 2 chain m/0/2147483647",
+			master:  testVec2MasterPubKey,
+			path:    []uint32{0, 2147483647},
+			wantPub: "xpub6ASAVgeWMg4pmutghzHG3BohahjwNwPmy2DgM6W9wGegtPrvNgjBwuZRD7hSDFhYfunq8vDgwG4ah1gVzZysgp3UsKz7VNjCnSUJJ5T4fdD",
+		},
+		{
+			name:    "test vector 2 chain m/0/2147483647/1",
+			master:  testVec2MasterPubKey,
+			path:    []uint32{0, 2147483647, 1},
+			wantPub: "xpub6CrnV7NzJy4VdgP5niTpqWJiFXMAca6qBm5Hfsry77SQmN1HGYHnjsZSujoHzdxf7ZNK5UVrmDXFPiEW2ecwHGWMFGUxPC9ARipss9rXd4b",
+		},
+		{
+			name:    "test vector 2 chain m/0/2147483647/1/2147483646",
+			master:  testVec2MasterPubKey,
+			path:    []uint32{0, 2147483647, 1, 2147483646},
+			wantPub: "xpub6FL2423qFaWzHCvBndkN9cbkn5cysiUeFq4eb9t9kE88jcmY63tNuLNRzpHPdAM4dUpLhZ7aUm2cJ5zF7KYonf4jAPfRqTMTRBNkQL3Tfta",
+		},
+		{
+			name:    "test vector 2 chain m/0/2147483647/1/2147483646/2",
+			master:  testVec2MasterPubKey,
+			path:    []uint32{0, 2147483647, 1, 2147483646, 2},
+			wantPub: "xpub6H7WkJf547AiSwAbX6xsm8Bmq9M9P1Gjequ5SipsjipWmtXSyp4C3uwzewedGEgAMsDy4jEvNTWtxLyqqHY9C12gaBmgUdk2CGmwachwnWK",
+		},
+	}
+
+tests:
+	for i, test := range tests {
+		extKey, err := NewExtendedKeyFromString(test.master, btcec.S256())
+		if err != nil {
+			t.Errorf("NewKeyFromString #%d (%s): unexpected error "+
+				"creating extended key: %v", i, test.name,
+				err)
+			continue
+		}
+
+		for _, childNum := range test.path {
+			var err error
+			_, extKey, err = DeriveChildKey(childNum, extKey, btcec.S256())
+			if err != nil {
+				t.Errorf("err: %v", err)
+				continue tests
+			}
+		}
+
+		pubStr := extKey.String()
+		if pubStr != test.wantPub {
+			t.Errorf("Derive #%d (%s): mismatched serialized "+
+				"public extended key -- got: %s, want: %s", i,
+				test.name, pubStr, test.wantPub)
+			continue
+		}
+	}
+}
diff --git a/crypto/commitments/commitment.go b/crypto/commitments/commitment.go
index c5a09487..d273fe74 100644
--- a/crypto/commitments/commitment.go
+++ b/crypto/commitments/commitment.go
@@ -12,7 +12,7 @@ package commitments
 import (
 	"math/big"
 
-	"github.com/binance-chain/tss-lib/common"
+	"github.com/bnb-chain/tss-lib/v2/common"
 )
 
 const (
@@ -58,11 +58,7 @@ func (cmt *HashCommitDecommit) Verify() bool {
 		return false
 	}
 	hash := common.SHA512_256i(D...)
-	if hash.Cmp(C) == 0 {
-		return true
-	} else {
-		return false
-	}
+	return hash.Cmp(C) == 0
 }
 
 func (cmt *HashCommitDecommit) DeCommit() (bool, HashDeCommitment) {
diff --git a/crypto/commitments/commitment_test.go b/crypto/commitments/commitment_test.go
index 20ffedc0..3dedf214 100644
--- a/crypto/commitments/commitment_test.go
+++ b/crypto/commitments/commitment_test.go
@@ -12,7 +12,7 @@ import (
 
 	"github.com/stretchr/testify/assert"
 
-	. "github.com/binance-chain/tss-lib/crypto/commitments"
+	. "github.com/bnb-chain/tss-lib/v2/crypto/commitments"
 )
 
 func TestCreateVerify(t *testing.T) {
diff --git a/crypto/dlnproof/proof.go b/crypto/dlnproof/proof.go
index eefadf64..43dd1556 100644
--- a/crypto/dlnproof/proof.go
+++ b/crypto/dlnproof/proof.go
@@ -15,8 +15,8 @@ import (
 	"fmt"
 	"math/big"
 
-	"github.com/binance-chain/tss-lib/common"
-	cmts "github.com/binance-chain/tss-lib/crypto/commitments"
+	"github.com/bnb-chain/tss-lib/v2/common"
+	cmts "github.com/bnb-chain/tss-lib/v2/crypto/commitments"
 )
 
 const Iterations = 128
@@ -28,6 +28,10 @@ type (
 	}
 )
 
+var (
+	one = big.NewInt(1)
+)
+
 func NewDLNProof(h1, h2, x, p, q, N *big.Int) *Proof {
 	pMulQ := new(big.Int).Mul(p, q)
 	modN, modPQ := common.ModInt(N), common.ModInt(pMulQ)
@@ -53,7 +57,33 @@ func (p *Proof) Verify(h1, h2, N *big.Int) bool {
 	if p == nil {
 		return false
 	}
+	if N.Sign() != 1 {
+		return false
+	}
 	modN := common.ModInt(N)
+	h1_ := new(big.Int).Mod(h1, N)
+	if h1_.Cmp(one) != 1 || h1_.Cmp(N) != -1 {
+		return false
+	}
+	h2_ := new(big.Int).Mod(h2, N)
+	if h2_.Cmp(one) != 1 || h2_.Cmp(N) != -1 {
+		return false
+	}
+	if h1_.Cmp(h2_) == 0 {
+		return false
+	}
+	for i := range p.T {
+		a := new(big.Int).Mod(p.T[i], N)
+		if a.Cmp(one) != 1 || a.Cmp(N) != -1 {
+			return false
+		}
+	}
+	for i := range p.Alpha {
+		a := new(big.Int).Mod(p.Alpha[i], N)
+		if a.Cmp(one) != 1 || a.Cmp(N) != -1 {
+			return false
+		}
+	}
 	msg := append([]*big.Int{h1, h2, N}, p.Alpha[:]...)
 	c := common.SHA512_256i(msg...)
 	cIBI := new(big.Int)
diff --git a/crypto/ecpoint.go b/crypto/ecpoint.go
index 9ea5afe0..d0248398 100644
--- a/crypto/ecpoint.go
+++ b/crypto/ecpoint.go
@@ -8,6 +8,7 @@ package crypto
 
 import (
 	"bytes"
+	"crypto/ecdsa"
 	"crypto/elliptic"
 	"encoding/binary"
 	"encoding/json"
@@ -15,7 +16,9 @@ import (
 	"fmt"
 	"math/big"
 
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/decred/dcrd/dcrec/edwards/v2"
+
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 // ECPoint convenience helper
@@ -24,6 +27,11 @@ type ECPoint struct {
 	coords [2]*big.Int
 }
 
+var (
+	eight    = big.NewInt(8)
+	eightInv = new(big.Int).ModInverse(eight, edwards.Edwards().Params().N)
+)
+
 // Creates a new ECPoint and checks that the given coordinates are on the elliptic curve.
 func NewECPoint(curve elliptic.Curve, X, Y *big.Int) (*ECPoint, error) {
 	if !isOnCurve(curve, X, Y) {
@@ -53,14 +61,29 @@ func (p *ECPoint) Add(p1 *ECPoint) (*ECPoint, error) {
 
 func (p *ECPoint) ScalarMult(k *big.Int) *ECPoint {
 	x, y := p.curve.ScalarMult(p.X(), p.Y(), k.Bytes())
-	newP, _ := NewECPoint(p.curve, x, y) // it must be on the curve, no need to check.
+	newP, err := NewECPoint(p.curve, x, y) // it must be on the curve, no need to check.
+	if err != nil {
+		panic(fmt.Errorf("scalar mult to an ecpoint %s", err.Error()))
+	}
 	return newP
 }
 
+func (p *ECPoint) ToECDSAPubKey() *ecdsa.PublicKey {
+	return &ecdsa.PublicKey{
+		Curve: p.curve,
+		X:     p.X(),
+		Y:     p.Y(),
+	}
+}
+
 func (p *ECPoint) IsOnCurve() bool {
 	return isOnCurve(p.curve, p.coords[0], p.coords[1])
 }
 
+func (p *ECPoint) Curve() elliptic.Curve {
+	return p.curve
+}
+
 func (p *ECPoint) Equals(p2 *ECPoint) bool {
 	if p == nil || p2 == nil {
 		return false
@@ -77,9 +100,16 @@ func (p *ECPoint) ValidateBasic() bool {
 	return p != nil && p.coords[0] != nil && p.coords[1] != nil && p.IsOnCurve()
 }
 
+func (p *ECPoint) EightInvEight() *ECPoint {
+	return p.ScalarMult(eight).ScalarMult(eightInv)
+}
+
 func ScalarBaseMult(curve elliptic.Curve, k *big.Int) *ECPoint {
 	x, y := curve.ScalarBaseMult(k.Bytes())
-	p, _ := NewECPoint(curve, x, y) // it must be on the curve, no need to check.
+	p, err := NewECPoint(curve, x, y) // it must be on the curve, no need to check.
+	if err != nil {
+		panic(fmt.Errorf("scalar mult to an ecpoint %s", err.Error()))
+	}
 	return p
 }
 
@@ -199,24 +229,44 @@ func (p *ECPoint) GobDecode(buf []byte) error {
 
 // crypto.ECPoint is not inherently json marshal-able
 func (p *ECPoint) MarshalJSON() ([]byte, error) {
+	ecName, ok := tss.GetCurveName(p.curve)
+	if !ok {
+		return nil, fmt.Errorf("cannot find %T name in curve registry, please call tss.RegisterCurve(name, curve) to register it first", p.curve)
+	}
+
 	return json.Marshal(&struct {
+		Curve  string
 		Coords [2]*big.Int
 	}{
+		Curve:  string(ecName),
 		Coords: p.coords,
 	})
 }
 
 func (p *ECPoint) UnmarshalJSON(payload []byte) error {
 	aux := &struct {
+		Curve  string
 		Coords [2]*big.Int
 	}{}
 	if err := json.Unmarshal(payload, &aux); err != nil {
 		return err
 	}
-	p.curve = tss.EC()
 	p.coords = [2]*big.Int{aux.Coords[0], aux.Coords[1]}
+
+	if len(aux.Curve) > 0 {
+		ec, ok := tss.GetCurveByName(tss.CurveName(aux.Curve))
+		if !ok {
+			return fmt.Errorf("cannot find curve named with %s in curve registry, please call tss.RegisterCurve(name, curve) to register it first", aux.Curve)
+		}
+		p.curve = ec
+	} else {
+		// forward compatible, use global ec as default value
+		p.curve = tss.EC()
+	}
+
 	if !p.IsOnCurve() {
-		return errors.New("ECPoint.UnmarshalJSON: the point is not on the elliptic curve")
+		return fmt.Errorf("ECPoint.UnmarshalJSON: the point is not on the elliptic curve (%T) ", p.curve)
 	}
+
 	return nil
 }
diff --git a/crypto/ecpoint_test.go b/crypto/ecpoint_test.go
index 6a4962ae..5f745dbc 100644
--- a/crypto/ecpoint_test.go
+++ b/crypto/ecpoint_test.go
@@ -7,12 +7,18 @@
 package crypto_test
 
 import (
+	"encoding/hex"
+	"encoding/json"
 	"math/big"
 	"reflect"
 	"testing"
 
-	. "github.com/binance-chain/tss-lib/crypto"
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/btcsuite/btcd/btcec/v2"
+	"github.com/decred/dcrd/dcrec/edwards/v2"
+	"github.com/stretchr/testify/assert"
+
+	. "github.com/bnb-chain/tss-lib/v2/crypto"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 func TestFlattenECPoints(t *testing.T) {
@@ -113,3 +119,49 @@ func TestUnFlattenECPoints(t *testing.T) {
 		})
 	}
 }
+
+func TestS256EcpointJsonSerialization(t *testing.T) {
+	ec := btcec.S256()
+	tss.RegisterCurve("secp256k1", ec)
+
+	pubKeyBytes, err := hex.DecodeString("03935336acb03b2b801d8f8ac5e92c56c4f6e93319901fdfffba9d340a874e2879")
+	assert.NoError(t, err)
+	pbk, err := btcec.ParsePubKey(pubKeyBytes)
+	assert.NoError(t, err)
+
+	point, err := NewECPoint(ec, pbk.X(), pbk.Y())
+	assert.NoError(t, err)
+	bz, err := json.Marshal(point)
+	assert.NoError(t, err)
+	assert.True(t, len(bz) > 0)
+
+	var umpoint ECPoint
+	err = json.Unmarshal(bz, &umpoint)
+	assert.NoError(t, err)
+
+	assert.True(t, point.Equals(&umpoint))
+	assert.True(t, reflect.TypeOf(point.Curve()) == reflect.TypeOf(umpoint.Curve()))
+}
+
+func TestEdwardsEcpointJsonSerialization(t *testing.T) {
+	ec := edwards.Edwards()
+	tss.RegisterCurve("ed25519", ec)
+
+	pubKeyBytes, err := hex.DecodeString("ae1e5bf5f3d6bf58b5c222088671fcbe78b437e28fae944c793897b26091f249")
+	assert.NoError(t, err)
+	pbk, err := edwards.ParsePubKey(pubKeyBytes)
+	assert.NoError(t, err)
+
+	point, err := NewECPoint(ec, pbk.X, pbk.Y)
+	assert.NoError(t, err)
+	bz, err := json.Marshal(point)
+	assert.NoError(t, err)
+	assert.True(t, len(bz) > 0)
+
+	var umpoint ECPoint
+	err = json.Unmarshal(bz, &umpoint)
+	assert.NoError(t, err)
+
+	assert.True(t, point.Equals(&umpoint))
+	assert.True(t, reflect.TypeOf(point.Curve()) == reflect.TypeOf(umpoint.Curve()))
+}
diff --git a/crypto/facproof/proof.go b/crypto/facproof/proof.go
new file mode 100644
index 00000000..32ac00cf
--- /dev/null
+++ b/crypto/facproof/proof.go
@@ -0,0 +1,214 @@
+// Copyright © 2019 Binance
+//
+// This file is part of Binance. The full Binance copyright notice, including
+// terms governing use, modification, and redistribution, is contained in the
+// file LICENSE at the root of the source code distribution tree.
+
+package facproof
+
+import (
+	"crypto/elliptic"
+	"errors"
+	"fmt"
+	"math/big"
+
+	"github.com/bnb-chain/tss-lib/v2/common"
+)
+
+const (
+	ProofFacBytesParts = 11
+)
+
+type (
+	ProofFac struct {
+		P, Q, A, B, T, Sigma, Z1, Z2, W1, W2, V *big.Int
+	}
+)
+
+var (
+	// rangeParameter l limits the bits of p or q to be in [1024-l, 1024+l]
+	rangeParameter = new(big.Int).Lsh(big.NewInt(1), 15)
+	one            = big.NewInt(1)
+)
+
+// NewProof implements prooffac
+func NewProof(Session []byte, ec elliptic.Curve, N0, NCap, s, t, N0p, N0q *big.Int) (*ProofFac, error) {
+	if ec == nil || N0 == nil || NCap == nil || s == nil || t == nil || N0p == nil || N0q == nil {
+		return nil, errors.New("ProveFac constructor received nil value(s)")
+	}
+
+	q := ec.Params().N
+	q3 := new(big.Int).Mul(q, q)
+	q3 = new(big.Int).Mul(q, q3)
+	qNCap := new(big.Int).Mul(q, NCap)
+	qN0NCap := new(big.Int).Mul(qNCap, N0)
+	q3NCap := new(big.Int).Mul(q3, NCap)
+	q3N0NCap := new(big.Int).Mul(q3NCap, N0)
+	sqrtN0 := new(big.Int).Sqrt(N0)
+	q3SqrtN0 := new(big.Int).Mul(q3, sqrtN0)
+
+	// Fig 28.1 sample
+	alpha := common.GetRandomPositiveInt(q3SqrtN0)
+	beta := common.GetRandomPositiveInt(q3SqrtN0)
+	mu := common.GetRandomPositiveInt(qNCap)
+	nu := common.GetRandomPositiveInt(qNCap)
+	sigma := common.GetRandomPositiveInt(qN0NCap)
+	r := common.GetRandomPositiveRelativelyPrimeInt(q3N0NCap)
+	x := common.GetRandomPositiveInt(q3NCap)
+	y := common.GetRandomPositiveInt(q3NCap)
+
+	// Fig 28.1 compute
+	modNCap := common.ModInt(NCap)
+	P := modNCap.Exp(s, N0p)
+	P = modNCap.Mul(P, modNCap.Exp(t, mu))
+
+	Q := modNCap.Exp(s, N0q)
+	Q = modNCap.Mul(Q, modNCap.Exp(t, nu))
+
+	A := modNCap.Exp(s, alpha)
+	A = modNCap.Mul(A, modNCap.Exp(t, x))
+
+	B := modNCap.Exp(s, beta)
+	B = modNCap.Mul(B, modNCap.Exp(t, y))
+
+	T := modNCap.Exp(Q, alpha)
+	T = modNCap.Mul(T, modNCap.Exp(t, r))
+
+	// Fig 28.2 e
+	var e *big.Int
+	{
+		eHash := common.SHA512_256i_TAGGED(Session, N0, NCap, s, t, P, Q, A, B, T, sigma)
+		e = common.RejectionSample(q, eHash)
+	}
+
+	// Fig 28.3
+	z1 := new(big.Int).Mul(e, N0p)
+	z1 = new(big.Int).Add(z1, alpha)
+
+	z2 := new(big.Int).Mul(e, N0q)
+	z2 = new(big.Int).Add(z2, beta)
+
+	w1 := new(big.Int).Mul(e, mu)
+	w1 = new(big.Int).Add(w1, x)
+
+	w2 := new(big.Int).Mul(e, nu)
+	w2 = new(big.Int).Add(w2, y)
+
+	v := new(big.Int).Mul(nu, N0p)
+	v = new(big.Int).Sub(sigma, v)
+	v = new(big.Int).Mul(e, v)
+	v = new(big.Int).Add(v, r)
+
+	return &ProofFac{P: P, Q: Q, A: A, B: B, T: T, Sigma: sigma, Z1: z1, Z2: z2, W1: w1, W2: w2, V: v}, nil
+}
+
+func NewProofFromBytes(bzs [][]byte) (*ProofFac, error) {
+	if !common.NonEmptyMultiBytes(bzs, ProofFacBytesParts) {
+		return nil, fmt.Errorf("expected %d byte parts to construct ProofFac", ProofFacBytesParts)
+	}
+	return &ProofFac{
+		P:     new(big.Int).SetBytes(bzs[0]),
+		Q:     new(big.Int).SetBytes(bzs[1]),
+		A:     new(big.Int).SetBytes(bzs[2]),
+		B:     new(big.Int).SetBytes(bzs[3]),
+		T:     new(big.Int).SetBytes(bzs[4]),
+		Sigma: new(big.Int).SetBytes(bzs[5]),
+		Z1:    new(big.Int).SetBytes(bzs[6]),
+		Z2:    new(big.Int).SetBytes(bzs[7]),
+		W1:    new(big.Int).SetBytes(bzs[8]),
+		W2:    new(big.Int).SetBytes(bzs[9]),
+		V:     new(big.Int).SetBytes(bzs[10]),
+	}, nil
+}
+
+func (pf *ProofFac) Verify(Session []byte, ec elliptic.Curve, N0, NCap, s, t *big.Int) bool {
+	if pf == nil || !pf.ValidateBasic() || ec == nil || N0 == nil || NCap == nil || s == nil || t == nil {
+		return false
+	}
+	if N0.Sign() != 1 {
+		return false
+	}
+
+	q := ec.Params().N
+	q3 := new(big.Int).Mul(q, q)
+	q3 = new(big.Int).Mul(q, q3)
+	sqrtN0 := new(big.Int).Sqrt(N0)
+	q3SqrtN0 := new(big.Int).Mul(q3, sqrtN0)
+
+	// Fig 28. Range Check
+	if !common.IsInInterval(pf.Z1, q3SqrtN0) {
+		return false
+	}
+
+	if !common.IsInInterval(pf.Z2, q3SqrtN0) {
+		return false
+	}
+
+	var e *big.Int
+	{
+		eHash := common.SHA512_256i_TAGGED(Session, N0, NCap, s, t, pf.P, pf.Q, pf.A, pf.B, pf.T, pf.Sigma)
+		e = common.RejectionSample(q, eHash)
+	}
+
+	// Fig 28. Equality Check
+	modNCap := common.ModInt(NCap)
+	{
+		LHS := modNCap.Mul(modNCap.Exp(s, pf.Z1), modNCap.Exp(t, pf.W1))
+		RHS := modNCap.Mul(pf.A, modNCap.Exp(pf.P, e))
+
+		if LHS.Cmp(RHS) != 0 {
+			return false
+		}
+	}
+
+	{
+		LHS := modNCap.Mul(modNCap.Exp(s, pf.Z2), modNCap.Exp(t, pf.W2))
+		RHS := modNCap.Mul(pf.B, modNCap.Exp(pf.Q, e))
+
+		if LHS.Cmp(RHS) != 0 {
+			return false
+		}
+	}
+
+	{
+		R := modNCap.Mul(modNCap.Exp(s, N0), modNCap.Exp(t, pf.Sigma))
+		LHS := modNCap.Mul(modNCap.Exp(pf.Q, pf.Z1), modNCap.Exp(t, pf.V))
+		RHS := modNCap.Mul(pf.T, modNCap.Exp(R, e))
+
+		if LHS.Cmp(RHS) != 0 {
+			return false
+		}
+	}
+
+	return true
+}
+
+func (pf *ProofFac) ValidateBasic() bool {
+	return pf.P != nil &&
+		pf.Q != nil &&
+		pf.A != nil &&
+		pf.B != nil &&
+		pf.T != nil &&
+		pf.Sigma != nil &&
+		pf.Z1 != nil &&
+		pf.Z2 != nil &&
+		pf.W1 != nil &&
+		pf.W2 != nil &&
+		pf.V != nil
+}
+
+func (pf *ProofFac) Bytes() [ProofFacBytesParts][]byte {
+	return [...][]byte{
+		pf.P.Bytes(),
+		pf.Q.Bytes(),
+		pf.A.Bytes(),
+		pf.B.Bytes(),
+		pf.T.Bytes(),
+		pf.Sigma.Bytes(),
+		pf.Z1.Bytes(),
+		pf.Z2.Bytes(),
+		pf.W1.Bytes(),
+		pf.W2.Bytes(),
+		pf.V.Bytes(),
+	}
+}
diff --git a/crypto/facproof/proof_test.go b/crypto/facproof/proof_test.go
new file mode 100644
index 00000000..7676f19f
--- /dev/null
+++ b/crypto/facproof/proof_test.go
@@ -0,0 +1,55 @@
+// Copyright © 2019 Binance
+//
+// This file is part of Binance. The full Binance copyright notice, including
+// terms governing use, modification, and redistribution, is contained in the
+// file LICENSE at the root of the source code distribution tree.
+
+package facproof_test
+
+import (
+	"math/big"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+
+	"github.com/bnb-chain/tss-lib/v2/common"
+	"github.com/bnb-chain/tss-lib/v2/crypto"
+	. "github.com/bnb-chain/tss-lib/v2/crypto/facproof"
+	"github.com/bnb-chain/tss-lib/v2/tss"
+)
+
+// Using a modulus length of 2048 is recommended in the GG18 spec
+const (
+	testSafePrimeBits = 1024
+)
+
+var (
+	Session = []byte("session")
+)
+
+func TestFac(test *testing.T) {
+	ec := tss.EC()
+
+	N0p := common.GetRandomPrimeInt(testSafePrimeBits)
+	N0q := common.GetRandomPrimeInt(testSafePrimeBits)
+	N0 := new(big.Int).Mul(N0p, N0q)
+
+	primes := [2]*big.Int{common.GetRandomPrimeInt(testSafePrimeBits), common.GetRandomPrimeInt(testSafePrimeBits)}
+	NCap, s, t, err := crypto.GenerateNTildei(primes)
+	assert.NoError(test, err)
+	proof, err := NewProof(Session, ec, N0, NCap, s, t, N0p, N0q)
+	assert.NoError(test, err)
+
+	ok := proof.Verify(Session, ec, N0, NCap, s, t)
+	assert.True(test, ok, "proof must verify")
+
+	N0p = common.GetRandomPrimeInt(1024)
+	N0q = common.GetRandomPrimeInt(1024)
+	N0 = new(big.Int).Mul(N0p, N0q)
+
+	proof, err = NewProof(Session, ec, N0, NCap, s, t, N0p, N0q)
+	assert.NoError(test, err)
+
+	ok = proof.Verify(Session, ec, N0, NCap, s, t)
+	assert.True(test, ok, "proof must verify")
+}
diff --git a/crypto/modproof/proof.go b/crypto/modproof/proof.go
new file mode 100644
index 00000000..3277db12
--- /dev/null
+++ b/crypto/modproof/proof.go
@@ -0,0 +1,243 @@
+// Copyright © 2019-2023 Binance
+//
+// This file is part of Binance. The full Binance copyright notice, including
+// terms governing use, modification, and redistribution, is contained in the
+// file LICENSE at the root of the source code distribution tree.
+
+package modproof
+
+import (
+	"fmt"
+	"math/big"
+
+	"github.com/bnb-chain/tss-lib/v2/common"
+)
+
+const (
+	Iterations         = 80
+	ProofModBytesParts = Iterations*2 + 3
+)
+
+var (
+	one = big.NewInt(1)
+)
+
+type (
+	ProofMod struct {
+		W *big.Int
+		X [Iterations]*big.Int
+		A *big.Int
+		B *big.Int
+		Z [Iterations]*big.Int
+	}
+)
+
+// isQuadraticResidue checks Euler criterion
+func isQuadraticResidue(X, N *big.Int) bool {
+	return big.Jacobi(X, N) == 1
+}
+
+func NewProof(Session []byte, N, P, Q *big.Int) (*ProofMod, error) {
+	Phi := new(big.Int).Mul(new(big.Int).Sub(P, one), new(big.Int).Sub(Q, one))
+	// Fig 16.1
+	W := common.GetRandomQuadraticNonResidue(N)
+
+	// Fig 16.2
+	Y := [Iterations]*big.Int{}
+	for i := range Y {
+		ei := common.SHA512_256i_TAGGED(Session, append([]*big.Int{W, N}, Y[:i]...)...)
+		Y[i] = common.RejectionSample(N, ei)
+	}
+
+	// Fig 16.3
+	modN, modPhi := common.ModInt(N), common.ModInt(Phi)
+	invN := new(big.Int).ModInverse(N, Phi)
+	X := [Iterations]*big.Int{}
+	// Fix bitLen of A and B
+	A := new(big.Int).Lsh(one, Iterations)
+	B := new(big.Int).Lsh(one, Iterations)
+	Z := [Iterations]*big.Int{}
+
+	// for fourth-root
+	expo := new(big.Int).Add(Phi, big.NewInt(4))
+	expo = new(big.Int).Rsh(expo, 3)
+	expo = modPhi.Mul(expo, expo)
+
+	for i := range Y {
+		for j := 0; j < 4; j++ {
+			a, b := j&1, j&2>>1
+			Yi := new(big.Int).SetBytes(Y[i].Bytes())
+			if a > 0 {
+				Yi = modN.Mul(big.NewInt(-1), Yi)
+			}
+			if b > 0 {
+				Yi = modN.Mul(W, Yi)
+			}
+			if isQuadraticResidue(Yi, P) && isQuadraticResidue(Yi, Q) {
+				Xi := modN.Exp(Yi, expo)
+				Zi := modN.Exp(Y[i], invN)
+				X[i], Z[i] = Xi, Zi
+				A.SetBit(A, i, uint(a))
+				B.SetBit(B, i, uint(b))
+				break
+			}
+		}
+	}
+
+	pf := &ProofMod{W: W, X: X, A: A, B: B, Z: Z}
+	return pf, nil
+}
+
+func NewProofFromBytes(bzs [][]byte) (*ProofMod, error) {
+	if !common.NonEmptyMultiBytes(bzs, ProofModBytesParts) {
+		return nil, fmt.Errorf("expected %d byte parts to construct ProofMod", ProofModBytesParts)
+	}
+	bis := make([]*big.Int, len(bzs))
+	for i := range bis {
+		bis[i] = new(big.Int).SetBytes(bzs[i])
+	}
+
+	X := [Iterations]*big.Int{}
+	copy(X[:], bis[1:(Iterations+1)])
+
+	Z := [Iterations]*big.Int{}
+	copy(Z[:], bis[(Iterations+3):])
+
+	return &ProofMod{
+		W: bis[0],
+		X: X,
+		A: bis[Iterations+1],
+		B: bis[Iterations+2],
+		Z: Z,
+	}, nil
+}
+
+func (pf *ProofMod) Verify(Session []byte, N *big.Int) bool {
+	if pf == nil || !pf.ValidateBasic() {
+		return false
+	}
+	// TODO: add basic properties checker
+	if isQuadraticResidue(pf.W, N) {
+		return false
+	}
+	if pf.W.Sign() != 1 || pf.W.Cmp(N) != -1 {
+		return false
+	}
+	for i := range pf.Z {
+		if pf.Z[i].Sign() != 1 || pf.Z[i].Cmp(N) != -1 {
+			return false
+		}
+	}
+	for i := range pf.X {
+		if pf.X[i].Sign() != 1 || pf.X[i].Cmp(N) != -1 {
+			return false
+		}
+	}
+	if pf.A.BitLen() != Iterations+1 {
+		return false
+	}
+	if pf.B.BitLen() != Iterations+1 {
+		return false
+	}
+
+	modN := common.ModInt(N)
+	Y := [Iterations]*big.Int{}
+	for i := range Y {
+		ei := common.SHA512_256i_TAGGED(Session, append([]*big.Int{pf.W, N}, Y[:i]...)...)
+		Y[i] = common.RejectionSample(N, ei)
+	}
+
+	// Fig 16. Verification
+	{
+		if N.Bit(0) == 0 || N.ProbablyPrime(30) {
+			return false
+		}
+	}
+
+	chs := make(chan bool, Iterations*2)
+	for i := 0; i < Iterations; i++ {
+		go func(i int) {
+			left := modN.Exp(pf.Z[i], N)
+			if left.Cmp(Y[i]) != 0 {
+				chs <- false
+				return
+			}
+			chs <- true
+		}(i)
+
+		go func(i int) {
+			a := pf.A.Bit(i)
+			b := pf.B.Bit(i)
+			if a != 0 && a != 1 {
+				chs <- false
+				return
+			}
+			if b != 0 && b != 1 {
+				chs <- false
+				return
+			}
+			left := modN.Exp(pf.X[i], big.NewInt(4))
+			right := Y[i]
+			if a > 0 {
+				right = modN.Mul(big.NewInt(-1), right)
+			}
+			if b > 0 {
+				right = modN.Mul(pf.W, right)
+			}
+			if left.Cmp(right) != 0 {
+				chs <- false
+				return
+			}
+			chs <- true
+		}(i)
+	}
+
+	for i := 0; i < Iterations*2; i++ {
+		if !<-chs {
+			return false
+		}
+	}
+
+	return true
+}
+
+func (pf *ProofMod) ValidateBasic() bool {
+	if pf.W == nil {
+		return false
+	}
+	for i := range pf.X {
+		if pf.X[i] == nil {
+			return false
+		}
+	}
+	if pf.A == nil {
+		return false
+	}
+	if pf.B == nil {
+		return false
+	}
+	for i := range pf.Z {
+		if pf.Z[i] == nil {
+			return false
+		}
+	}
+	return true
+}
+
+func (pf *ProofMod) Bytes() [ProofModBytesParts][]byte {
+	bzs := [ProofModBytesParts][]byte{}
+	bzs[0] = pf.W.Bytes()
+	for i := range pf.X {
+		if pf.X[i] != nil {
+			bzs[1+i] = pf.X[i].Bytes()
+		}
+	}
+	bzs[Iterations+1] = pf.A.Bytes()
+	bzs[Iterations+2] = pf.B.Bytes()
+	for i := range pf.Z {
+		if pf.Z[i] != nil {
+			bzs[Iterations+3+i] = pf.Z[i].Bytes()
+		}
+	}
+	return bzs
+}
diff --git a/crypto/modproof/proof_test.go b/crypto/modproof/proof_test.go
new file mode 100644
index 00000000..5a6dc419
--- /dev/null
+++ b/crypto/modproof/proof_test.go
@@ -0,0 +1,37 @@
+// Copyright © 2019-2023 Binance
+//
+// This file is part of Binance. The full Binance copyright notice, including
+// terms governing use, modification, and redistribution, is contained in the
+// file LICENSE at the root of the source code distribution tree.
+
+package modproof_test
+
+import (
+	"testing"
+	"time"
+
+	. "github.com/bnb-chain/tss-lib/v2/crypto/modproof"
+	"github.com/bnb-chain/tss-lib/v2/ecdsa/keygen"
+	"github.com/stretchr/testify/assert"
+)
+
+var (
+	Session = []byte("session")
+)
+
+func TestMod(test *testing.T) {
+	preParams, err := keygen.GeneratePreParams(time.Minute*10, 8)
+	assert.NoError(test, err)
+
+	P, Q, N := preParams.PaillierSK.P, preParams.PaillierSK.Q, preParams.PaillierSK.N
+
+	proof, err := NewProof(Session, N, P, Q)
+	assert.NoError(test, err)
+
+	proofBzs := proof.Bytes()
+	proof, err = NewProofFromBytes(proofBzs[:])
+	assert.NoError(test, err)
+
+	ok := proof.Verify(Session, N)
+	assert.True(test, ok, "proof must verify")
+}
diff --git a/crypto/mta/proofs.go b/crypto/mta/proofs.go
index e827af16..2bd61174 100644
--- a/crypto/mta/proofs.go
+++ b/crypto/mta/proofs.go
@@ -7,14 +7,15 @@
 package mta
 
 import (
+	"crypto/elliptic"
 	"errors"
 	"fmt"
 	"math/big"
 
-	"github.com/binance-chain/tss-lib/common"
-	"github.com/binance-chain/tss-lib/crypto"
-	"github.com/binance-chain/tss-lib/crypto/paillier"
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/common"
+	"github.com/bnb-chain/tss-lib/v2/crypto"
+	"github.com/bnb-chain/tss-lib/v2/crypto/paillier"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 const (
@@ -35,16 +36,18 @@ type (
 
 // ProveBobWC implements Bob's proof both with or without check "ProveMtawc_Bob" and "ProveMta_Bob" used in the MtA protocol from GG18Spec (9) Figs. 10 & 11.
 // an absent `X` generates the proof without the X consistency check X = g^x
-func ProveBobWC(pk *paillier.PublicKey, NTilde, h1, h2, c1, c2, x, y, r *big.Int, X *crypto.ECPoint) (*ProofBobWC, error) {
+func ProveBobWC(Session []byte, ec elliptic.Curve, pk *paillier.PublicKey, NTilde, h1, h2, c1, c2, x, y, r *big.Int, X *crypto.ECPoint) (*ProofBobWC, error) {
 	if pk == nil || NTilde == nil || h1 == nil || h2 == nil || c1 == nil || c2 == nil || x == nil || y == nil || r == nil {
 		return nil, errors.New("ProveBob() received a nil argument")
 	}
 
 	NSquared := pk.NSquare()
 
-	q := tss.EC().Params().N
+	q := ec.Params().N
 	q3 := new(big.Int).Mul(q, q)
 	q3 = new(big.Int).Mul(q, q3)
+	q7 := new(big.Int).Mul(q3, q3)
+	q7 = new(big.Int).Mul(q7, q)
 	qNTilde := new(big.Int).Mul(q, NTilde)
 	q3NTilde := new(big.Int).Mul(q3, NTilde)
 
@@ -55,19 +58,20 @@ func ProveBobWC(pk *paillier.PublicKey, NTilde, h1, h2, c1, c2, x, y, r *big.Int
 	// 2.
 	rho := common.GetRandomPositiveInt(qNTilde)
 	sigma := common.GetRandomPositiveInt(qNTilde)
-	tau := common.GetRandomPositiveInt(qNTilde)
+	tau := common.GetRandomPositiveInt(q3NTilde)
 
 	// 3.
 	rhoPrm := common.GetRandomPositiveInt(q3NTilde)
 
 	// 4.
 	beta := common.GetRandomPositiveRelativelyPrimeInt(pk.N)
-	gamma := common.GetRandomPositiveRelativelyPrimeInt(pk.N)
+
+	gamma := common.GetRandomPositiveInt(q7)
 
 	// 5.
-	u := crypto.NewECPointNoCurveCheck(tss.EC(), zero, zero) // initialization suppresses an IDE warning
+	u := crypto.NewECPointNoCurveCheck(ec, zero, zero) // initialization suppresses an IDE warning
 	if X != nil {
-		u = crypto.ScalarBaseMult(tss.EC(), alpha)
+		u = crypto.ScalarBaseMult(ec, alpha)
 	}
 
 	// 6.
@@ -99,9 +103,9 @@ func ProveBobWC(pk *paillier.PublicKey, NTilde, h1, h2, c1, c2, x, y, r *big.Int
 		var eHash *big.Int
 		// X is nil if called by ProveBob (Bob's proof "without check")
 		if X == nil {
-			eHash = common.SHA512_256i(append(pk.AsInts(), c1, c2, z, zPrm, t, v, w)...)
+			eHash = common.SHA512_256i_TAGGED(Session, append(pk.AsInts(), c1, c2, z, zPrm, t, v, w)...)
 		} else {
-			eHash = common.SHA512_256i(append(pk.AsInts(), X.X(), X.Y(), c1, c2, u.X(), u.Y(), z, zPrm, t, v, w)...)
+			eHash = common.SHA512_256i_TAGGED(Session, append(pk.AsInts(), X.X(), X.Y(), c1, c2, u.X(), u.Y(), z, zPrm, t, v, w)...)
 		}
 		e = common.RejectionSample(q, eHash)
 	}
@@ -135,22 +139,22 @@ func ProveBobWC(pk *paillier.PublicKey, NTilde, h1, h2, c1, c2, x, y, r *big.Int
 }
 
 // ProveBob implements Bob's proof "ProveMta_Bob" used in the MtA protocol from GG18Spec (9) Fig. 11.
-func ProveBob(pk *paillier.PublicKey, NTilde, h1, h2, c1, c2, x, y, r *big.Int) (*ProofBob, error) {
+func ProveBob(Session []byte, ec elliptic.Curve, pk *paillier.PublicKey, NTilde, h1, h2, c1, c2, x, y, r *big.Int) (*ProofBob, error) {
 	// the Bob proof ("with check") contains the ProofBob "without check"; this method extracts and returns it
 	// X is supplied as nil to exclude it from the proof hash
-	pf, err := ProveBobWC(pk, NTilde, h1, h2, c1, c2, x, y, r, nil)
+	pf, err := ProveBobWC(Session, ec, pk, NTilde, h1, h2, c1, c2, x, y, r, nil)
 	if err != nil {
 		return nil, err
 	}
 	return pf.ProofBob, nil
 }
 
-func ProofBobWCFromBytes(bzs [][]byte) (*ProofBobWC, error) {
+func ProofBobWCFromBytes(ec elliptic.Curve, bzs [][]byte) (*ProofBobWC, error) {
 	proofBob, err := ProofBobFromBytes(bzs)
 	if err != nil {
 		return nil, err
 	}
-	point, err := crypto.NewECPoint(tss.EC(),
+	point, err := crypto.NewECPoint(ec,
 		new(big.Int).SetBytes(bzs[10]),
 		new(big.Int).SetBytes(bzs[11]))
 	if err != nil {
@@ -185,19 +189,84 @@ func ProofBobFromBytes(bzs [][]byte) (*ProofBob, error) {
 
 // ProveBobWC.Verify implements verification of Bob's proof with check "VerifyMtawc_Bob" used in the MtA protocol from GG18Spec (9) Fig. 10.
 // an absent `X` verifies a proof generated without the X consistency check X = g^x
-func (pf *ProofBobWC) Verify(pk *paillier.PublicKey, NTilde, h1, h2, c1, c2 *big.Int, X *crypto.ECPoint) bool {
+func (pf *ProofBobWC) Verify(Session []byte, ec elliptic.Curve, pk *paillier.PublicKey, NTilde, h1, h2, c1, c2 *big.Int, X *crypto.ECPoint) bool {
 	if pk == nil || NTilde == nil || h1 == nil || h2 == nil || c1 == nil || c2 == nil {
 		return false
 	}
 
-	q := tss.EC().Params().N
-	q3 := new(big.Int).Mul(q, q)
-	q3 = new(big.Int).Mul(q, q3)
+	q := ec.Params().N
+	q3 := new(big.Int).Mul(q, q)   // q^2
+	q3 = new(big.Int).Mul(q, q3)   // q^3
+	q7 := new(big.Int).Mul(q3, q3) // q^6
+	q7 = new(big.Int).Mul(q7, q)   // q^7
+
+	if !common.IsInInterval(pf.Z, NTilde) {
+		return false
+	}
+	if !common.IsInInterval(pf.ZPrm, NTilde) {
+		return false
+	}
+	if !common.IsInInterval(pf.T, NTilde) {
+		return false
+	}
+	if !common.IsInInterval(pf.V, pk.NSquare()) {
+		return false
+	}
+	if !common.IsInInterval(pf.W, NTilde) {
+		return false
+	}
+	if !common.IsInInterval(pf.S, pk.N) {
+		return false
+	}
+	if new(big.Int).GCD(nil, nil, pf.Z, NTilde).Cmp(one) != 0 {
+		return false
+	}
+	if new(big.Int).GCD(nil, nil, pf.ZPrm, NTilde).Cmp(one) != 0 {
+		return false
+	}
+	if new(big.Int).GCD(nil, nil, pf.T, NTilde).Cmp(one) != 0 {
+		return false
+	}
+	if new(big.Int).GCD(nil, nil, pf.V, pk.NSquare()).Cmp(one) != 0 {
+		return false
+	}
+	if new(big.Int).GCD(nil, nil, pf.W, NTilde).Cmp(one) != 0 {
+		return false
+	}
+
+	gcd := big.NewInt(0)
+	if pf.S.Cmp(zero) == 0 {
+		return false
+	}
+	if gcd.GCD(nil, nil, pf.S, pk.N).Cmp(one) != 0 {
+		return false
+	}
+	if pf.V.Cmp(zero) == 0 {
+		return false
+	}
+	if gcd.GCD(nil, nil, pf.V, pk.N).Cmp(one) != 0 {
+		return false
+	}
+	if pf.S1.Cmp(q) == -1 {
+		return false
+	}
+	if pf.S2.Cmp(q) == -1 {
+		return false
+	}
+	if pf.T1.Cmp(q) == -1 {
+		return false
+	}
+	if pf.T2.Cmp(q) == -1 {
+		return false
+	}
 
 	// 3.
 	if pf.S1.Cmp(q3) > 0 {
 		return false
 	}
+	if pf.T1.Cmp(q7) > 0 {
+		return false
+	}
 
 	// 1-2. e'
 	var e *big.Int
@@ -205,9 +274,12 @@ func (pf *ProofBobWC) Verify(pk *paillier.PublicKey, NTilde, h1, h2, c1, c2 *big
 		var eHash *big.Int
 		// X is nil if called on a ProveBob (Bob's proof "without check")
 		if X == nil {
-			eHash = common.SHA512_256i(append(pk.AsInts(), c1, c2, pf.Z, pf.ZPrm, pf.T, pf.V, pf.W)...)
+			eHash = common.SHA512_256i_TAGGED(Session, append(pk.AsInts(), c1, c2, pf.Z, pf.ZPrm, pf.T, pf.V, pf.W)...)
 		} else {
-			eHash = common.SHA512_256i(append(pk.AsInts(), X.X(), X.Y(), c1, c2, pf.U.X(), pf.U.Y(), pf.Z, pf.ZPrm, pf.T, pf.V, pf.W)...)
+			if !tss.SameCurve(ec, X.Curve()) {
+				return false
+			}
+			eHash = common.SHA512_256i_TAGGED(Session, append(pk.AsInts(), X.X(), X.Y(), c1, c2, pf.U.X(), pf.U.Y(), pf.Z, pf.ZPrm, pf.T, pf.V, pf.W)...)
 		}
 		e = common.RejectionSample(q, eHash)
 	}
@@ -216,8 +288,8 @@ func (pf *ProofBobWC) Verify(pk *paillier.PublicKey, NTilde, h1, h2, c1, c2 *big
 
 	// 4. runs only in the "with check" mode from Fig. 10
 	if X != nil {
-		s1ModQ := new(big.Int).Mod(pf.S1, tss.EC().Params().N)
-		gS1 := crypto.ScalarBaseMult(tss.EC(), s1ModQ)
+		s1ModQ := new(big.Int).Mod(pf.S1, ec.Params().N)
+		gS1 := crypto.ScalarBaseMult(ec, s1ModQ)
 		xEU, err := X.ScalarMult(e).Add(pf.U)
 		if err != nil || !gS1.Equals(xEU) {
 			return false
@@ -268,12 +340,12 @@ func (pf *ProofBobWC) Verify(pk *paillier.PublicKey, NTilde, h1, h2, c1, c2 *big
 }
 
 // ProveBob.Verify implements verification of Bob's proof without check "VerifyMta_Bob" used in the MtA protocol from GG18Spec (9) Fig. 11.
-func (pf *ProofBob) Verify(pk *paillier.PublicKey, NTilde, h1, h2, c1, c2 *big.Int) bool {
+func (pf *ProofBob) Verify(Session []byte, ec elliptic.Curve, pk *paillier.PublicKey, NTilde, h1, h2, c1, c2 *big.Int) bool {
 	if pf == nil {
 		return false
 	}
 	pfWC := &ProofBobWC{ProofBob: pf, U: nil}
-	return pfWC.Verify(pk, NTilde, h1, h2, c1, c2, nil)
+	return pfWC.Verify(Session, ec, pk, NTilde, h1, h2, c1, c2, nil)
 }
 
 func (pf *ProofBob) ValidateBasic() bool {
diff --git a/crypto/mta/range_proof.go b/crypto/mta/range_proof.go
index 508439a0..11bb999f 100644
--- a/crypto/mta/range_proof.go
+++ b/crypto/mta/range_proof.go
@@ -7,13 +7,13 @@
 package mta
 
 import (
+	"crypto/elliptic"
 	"errors"
 	"fmt"
 	"math/big"
 
-	"github.com/binance-chain/tss-lib/common"
-	"github.com/binance-chain/tss-lib/crypto/paillier"
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/common"
+	"github.com/bnb-chain/tss-lib/v2/crypto/paillier"
 )
 
 const (
@@ -22,6 +22,7 @@ const (
 
 var (
 	zero = big.NewInt(0)
+	one  = big.NewInt(1)
 )
 
 type (
@@ -31,12 +32,12 @@ type (
 )
 
 // ProveRangeAlice implements Alice's range proof used in the MtA and MtAwc protocols from GG18Spec (9) Fig. 9.
-func ProveRangeAlice(pk *paillier.PublicKey, c, NTilde, h1, h2, m, r *big.Int) (*RangeProofAlice, error) {
+func ProveRangeAlice(ec elliptic.Curve, pk *paillier.PublicKey, c, NTilde, h1, h2, m, r *big.Int) (*RangeProofAlice, error) {
 	if pk == nil || NTilde == nil || h1 == nil || h2 == nil || c == nil || m == nil || r == nil {
 		return nil, errors.New("ProveRangeAlice constructor received nil value(s)")
 	}
 
-	q := tss.EC().Params().N
+	q := ec.Params().N
 	q3 := new(big.Int).Mul(q, q)
 	q3 = new(big.Int).Mul(q, q3)
 	qNTilde := new(big.Int).Mul(q, NTilde)
@@ -103,16 +104,43 @@ func RangeProofAliceFromBytes(bzs [][]byte) (*RangeProofAlice, error) {
 	}, nil
 }
 
-func (pf *RangeProofAlice) Verify(pk *paillier.PublicKey, NTilde, h1, h2, c *big.Int) bool {
+func (pf *RangeProofAlice) Verify(ec elliptic.Curve, pk *paillier.PublicKey, NTilde, h1, h2, c *big.Int) bool {
 	if pf == nil || !pf.ValidateBasic() || pk == nil || NTilde == nil || h1 == nil || h2 == nil || c == nil {
 		return false
 	}
 
-	N2 := new(big.Int).Mul(pk.N, pk.N)
-	q := tss.EC().Params().N
+	q := ec.Params().N
 	q3 := new(big.Int).Mul(q, q)
 	q3 = new(big.Int).Mul(q, q3)
 
+	if !common.IsInInterval(pf.Z, NTilde) {
+		return false
+	}
+	if !common.IsInInterval(pf.U, pk.NSquare()) {
+		return false
+	}
+	if !common.IsInInterval(pf.W, NTilde) {
+		return false
+	}
+	if !common.IsInInterval(pf.S, pk.N) {
+		return false
+	}
+	if new(big.Int).GCD(nil, nil, pf.Z, NTilde).Cmp(one) != 0 {
+		return false
+	}
+	if new(big.Int).GCD(nil, nil, pf.U, pk.NSquare()).Cmp(one) != 0 {
+		return false
+	}
+	if new(big.Int).GCD(nil, nil, pf.W, NTilde).Cmp(one) != 0 {
+		return false
+	}
+	if pf.S1.Cmp(q) == -1 {
+		return false
+	}
+	if pf.S2.Cmp(q) == -1 {
+		return false
+	}
+
 	// 3.
 	if pf.S1.Cmp(q3) == 1 {
 		return false
@@ -129,14 +157,14 @@ func (pf *RangeProofAlice) Verify(pk *paillier.PublicKey, NTilde, h1, h2, c *big
 	minusE := new(big.Int).Sub(zero, e)
 
 	{ // 4. gamma^s_1 * s^N * c^-e
-		modN2 := common.ModInt(N2)
+		modNSquared := common.ModInt(pk.NSquare())
 
-		cExpMinusE := modN2.Exp(c, minusE)
-		sExpN := modN2.Exp(pf.S, pk.N)
-		gammaExpS1 := modN2.Exp(pk.Gamma(), pf.S1)
+		cExpMinusE := modNSquared.Exp(c, minusE)
+		sExpN := modNSquared.Exp(pf.S, pk.N)
+		gammaExpS1 := modNSquared.Exp(pk.Gamma(), pf.S1)
 		// u != (4)
-		products = modN2.Mul(gammaExpS1, sExpN)
-		products = modN2.Mul(products, cExpMinusE)
+		products = modNSquared.Mul(gammaExpS1, sExpN)
+		products = modNSquared.Mul(products, cExpMinusE)
 		if pf.U.Cmp(products) != 0 {
 			return false
 		}
diff --git a/crypto/mta/range_proof_test.go b/crypto/mta/range_proof_test.go
index 73a9950a..318335f1 100644
--- a/crypto/mta/range_proof_test.go
+++ b/crypto/mta/range_proof_test.go
@@ -7,16 +7,18 @@
 package mta
 
 import (
+	"context"
+	"fmt"
 	"math/big"
 	"testing"
 	"time"
 
 	"github.com/stretchr/testify/assert"
 
-	"github.com/binance-chain/tss-lib/common"
-	"github.com/binance-chain/tss-lib/crypto"
-	"github.com/binance-chain/tss-lib/crypto/paillier"
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/common"
+	"github.com/bnb-chain/tss-lib/v2/crypto"
+	"github.com/bnb-chain/tss-lib/v2/crypto/paillier"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 // Using a modulus length of 2048 is recommended in the GG18 spec
@@ -27,7 +29,10 @@ const (
 func TestProveRangeAlice(t *testing.T) {
 	q := tss.EC().Params().N
 
-	sk, pk, err := paillier.GenerateKeyPair(testPaillierKeyLength, 10*time.Minute)
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Minute)
+	defer cancel()
+
+	sk, pk, err := paillier.GenerateKeyPair(ctx, testPaillierKeyLength)
 	assert.NoError(t, err)
 
 	m := common.GetRandomPositiveInt(q)
@@ -37,9 +42,82 @@ func TestProveRangeAlice(t *testing.T) {
 	primes := [2]*big.Int{common.GetRandomPrimeInt(testSafePrimeBits), common.GetRandomPrimeInt(testSafePrimeBits)}
 	NTildei, h1i, h2i, err := crypto.GenerateNTildei(primes)
 	assert.NoError(t, err)
-	proof, err := ProveRangeAlice(pk, c, NTildei, h1i, h2i, m, r)
+	proof, err := ProveRangeAlice(tss.EC(), pk, c, NTildei, h1i, h2i, m, r)
 	assert.NoError(t, err)
 
-	ok := proof.Verify(pk, NTildei, h1i, h2i, c)
+	ok := proof.Verify(tss.EC(), pk, NTildei, h1i, h2i, c)
 	assert.True(t, ok, "proof must verify")
 }
+
+func TestProveRangeAliceBypassed(t *testing.T) {
+	q := tss.EC().Params().N
+
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Minute)
+	defer cancel()
+
+	sk0, pk0, err := paillier.GenerateKeyPair(ctx, testPaillierKeyLength)
+	assert.NoError(t, err)
+
+	m0 := common.GetRandomPositiveInt(q)
+	c0, r0, err := sk0.EncryptAndReturnRandomness(m0)
+	assert.NoError(t, err)
+
+	primes0 := [2]*big.Int{common.GetRandomPrimeInt(testSafePrimeBits), common.GetRandomPrimeInt(testSafePrimeBits)}
+	Ntildei0, h1i0, h2i0, err := crypto.GenerateNTildei(primes0)
+	assert.NoError(t, err)
+	proof0, err := ProveRangeAlice(tss.EC(), pk0, c0, Ntildei0, h1i0, h2i0, m0, r0)
+	assert.NoError(t, err)
+
+	ok0 := proof0.Verify(tss.EC(), pk0, Ntildei0, h1i0, h2i0, c0)
+	assert.True(t, ok0, "proof must verify")
+
+	//proof 2
+	sk1, pk1, err := paillier.GenerateKeyPair(ctx, testPaillierKeyLength)
+	assert.NoError(t, err)
+
+	m1 := common.GetRandomPositiveInt(q)
+	c1, r1, err := sk1.EncryptAndReturnRandomness(m1)
+	assert.NoError(t, err)
+
+	primes1 := [2]*big.Int{common.GetRandomPrimeInt(testSafePrimeBits), common.GetRandomPrimeInt(testSafePrimeBits)}
+	Ntildei1, h1i1, h2i1, err := crypto.GenerateNTildei(primes1)
+	assert.NoError(t, err)
+	proof1, err := ProveRangeAlice(tss.EC(), pk1, c1, Ntildei1, h1i1, h2i1, m1, r1)
+	assert.NoError(t, err)
+
+	ok1 := proof1.Verify(tss.EC(), pk1, Ntildei1, h1i1, h2i1, c1)
+	assert.True(t, ok1, "proof must verify")
+
+	cross0 := proof0.Verify(tss.EC(), pk1, Ntildei1, h1i1, h2i1, c1)
+	assert.False(t, cross0, "proof must not verify")
+
+	cross1 := proof1.Verify(tss.EC(), pk0, Ntildei0, h1i0, h2i0, c0)
+	assert.False(t, cross1, "proof must not verify")
+
+	fmt.Println("Did verify proof 0 with data from 0?", ok0)
+	fmt.Println("Did verify proof 1 with data from 1?", ok1)
+
+	fmt.Println("Did verify proof 0 with data from 1?", cross0)
+	fmt.Println("Did verify proof 1 with data from 0?", cross1)
+
+	//new bypass
+	bypassedproofNew := &RangeProofAlice{
+		S:  big.NewInt(1),
+		S1: big.NewInt(0),
+		S2: big.NewInt(0),
+		Z:  big.NewInt(1),
+		U:  big.NewInt(1),
+		W:  big.NewInt(1),
+	}
+
+	cBogus := big.NewInt(1)
+	proofBogus, _ := ProveRangeAlice(tss.EC(), pk1, cBogus, Ntildei1, h1i1, h2i1, m1, r1)
+
+	ok2 := proofBogus.Verify(tss.EC(), pk1, Ntildei1, h1i1, h2i1, cBogus)
+	bypassresult3 := bypassedproofNew.Verify(tss.EC(), pk1, Ntildei1, h1i1, h2i1, cBogus)
+
+	//c = 1 is not valid, even though we can find a range proof for it that passes!
+	//this also means that the homo mul and add needs to be checked with this!
+	fmt.Println("Did verify proof bogus with data from bogus?", ok2)
+	fmt.Println("Did we bypass proof 3?", bypassresult3)
+}
diff --git a/crypto/mta/share_protocol.go b/crypto/mta/share_protocol.go
index faaa9f31..94c1c877 100644
--- a/crypto/mta/share_protocol.go
+++ b/crypto/mta/share_protocol.go
@@ -7,16 +7,17 @@
 package mta
 
 import (
+	"crypto/elliptic"
 	"errors"
 	"math/big"
 
-	"github.com/binance-chain/tss-lib/common"
-	"github.com/binance-chain/tss-lib/crypto"
-	"github.com/binance-chain/tss-lib/crypto/paillier"
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/common"
+	"github.com/bnb-chain/tss-lib/v2/crypto"
+	"github.com/bnb-chain/tss-lib/v2/crypto/paillier"
 )
 
 func AliceInit(
+	ec elliptic.Curve,
 	pkA *paillier.PublicKey,
 	a, NTildeB, h1B, h2B *big.Int,
 ) (cA *big.Int, pf *RangeProofAlice, err error) {
@@ -24,21 +25,26 @@ func AliceInit(
 	if err != nil {
 		return nil, nil, err
 	}
-	pf, err = ProveRangeAlice(pkA, cA, NTildeB, h1B, h2B, a, rA)
+	pf, err = ProveRangeAlice(ec, pkA, cA, NTildeB, h1B, h2B, a, rA)
 	return cA, pf, err
 }
 
 func BobMid(
+	Session []byte,
+	ec elliptic.Curve,
 	pkA *paillier.PublicKey,
 	pf *RangeProofAlice,
 	b, cA, NTildeA, h1A, h2A, NTildeB, h1B, h2B *big.Int,
 ) (beta, cB, betaPrm *big.Int, piB *ProofBob, err error) {
-	if !pf.Verify(pkA, NTildeB, h1B, h2B, cA) {
+	if !pf.Verify(ec, pkA, NTildeB, h1B, h2B, cA) {
 		err = errors.New("RangeProofAlice.Verify() returned false")
 		return
 	}
-	q := tss.EC().Params().N
-	betaPrm = common.GetRandomPositiveInt(pkA.N)
+	q := ec.Params().N
+	q5 := new(big.Int).Mul(q, q)  // q^2
+	q5 = new(big.Int).Mul(q5, q5) // q^4
+	q5 = new(big.Int).Mul(q5, q)  // q^5
+	betaPrm = common.GetRandomPositiveInt(q5)
 	cBetaPrm, cRand, err := pkA.EncryptAndReturnRandomness(betaPrm)
 	if err != nil {
 		return
@@ -52,22 +58,27 @@ func BobMid(
 		return
 	}
 	beta = common.ModInt(q).Sub(zero, betaPrm)
-	piB, err = ProveBob(pkA, NTildeA, h1A, h2A, cA, cB, b, betaPrm, cRand)
+	piB, err = ProveBob(Session, ec, pkA, NTildeA, h1A, h2A, cA, cB, b, betaPrm, cRand)
 	return
 }
 
 func BobMidWC(
+	Session []byte,
+	ec elliptic.Curve,
 	pkA *paillier.PublicKey,
 	pf *RangeProofAlice,
 	b, cA, NTildeA, h1A, h2A, NTildeB, h1B, h2B *big.Int,
 	B *crypto.ECPoint,
 ) (beta, cB, betaPrm *big.Int, piB *ProofBobWC, err error) {
-	if !pf.Verify(pkA, NTildeB, h1B, h2B, cA) {
+	if !pf.Verify(ec, pkA, NTildeB, h1B, h2B, cA) {
 		err = errors.New("RangeProofAlice.Verify() returned false")
 		return
 	}
-	q := tss.EC().Params().N
-	betaPrm = common.GetRandomPositiveInt(pkA.N)
+	q := ec.Params().N
+	q5 := new(big.Int).Mul(q, q)  // q^2
+	q5 = new(big.Int).Mul(q5, q5) // q^4
+	q5 = new(big.Int).Mul(q5, q)  // q^5
+	betaPrm = common.GetRandomPositiveInt(q5)
 	cBetaPrm, cRand, err := pkA.EncryptAndReturnRandomness(betaPrm)
 	if err != nil {
 		return
@@ -81,41 +92,45 @@ func BobMidWC(
 		return
 	}
 	beta = common.ModInt(q).Sub(zero, betaPrm)
-	piB, err = ProveBobWC(pkA, NTildeA, h1A, h2A, cA, cB, b, betaPrm, cRand, B)
+	piB, err = ProveBobWC(Session, ec, pkA, NTildeA, h1A, h2A, cA, cB, b, betaPrm, cRand, B)
 	return
 }
 
 func AliceEnd(
+	Session []byte,
+	ec elliptic.Curve,
 	pkA *paillier.PublicKey,
 	pf *ProofBob,
 	h1A, h2A, cA, cB, NTildeA *big.Int,
 	sk *paillier.PrivateKey,
 ) (*big.Int, error) {
-	if !pf.Verify(pkA, NTildeA, h1A, h2A, cA, cB) {
+	if !pf.Verify(Session, ec, pkA, NTildeA, h1A, h2A, cA, cB) {
 		return nil, errors.New("ProofBob.Verify() returned false")
 	}
 	alphaPrm, err := sk.Decrypt(cB)
 	if err != nil {
 		return nil, err
 	}
-	q := tss.EC().Params().N
+	q := ec.Params().N
 	return new(big.Int).Mod(alphaPrm, q), nil
 }
 
 func AliceEndWC(
+	Session []byte,
+	ec elliptic.Curve,
 	pkA *paillier.PublicKey,
 	pf *ProofBobWC,
 	B *crypto.ECPoint,
 	cA, cB, NTildeA, h1A, h2A *big.Int,
 	sk *paillier.PrivateKey,
 ) (*big.Int, error) {
-	if !pf.Verify(pkA, NTildeA, h1A, h2A, cA, cB, B) {
+	if !pf.Verify(Session, ec, pkA, NTildeA, h1A, h2A, cA, cB, B) {
 		return nil, errors.New("ProofBobWC.Verify() returned false")
 	}
 	alphaPrm, err := sk.Decrypt(cB)
 	if err != nil {
 		return nil, err
 	}
-	q := tss.EC().Params().N
+	q := ec.Params().N
 	return new(big.Int).Mod(alphaPrm, q), nil
 }
diff --git a/crypto/mta/share_protocol_test.go b/crypto/mta/share_protocol_test.go
index 0e9e2864..aed84f39 100644
--- a/crypto/mta/share_protocol_test.go
+++ b/crypto/mta/share_protocol_test.go
@@ -7,17 +7,18 @@
 package mta
 
 import (
+	"context"
 	"math/big"
 	"testing"
 	"time"
 
 	"github.com/stretchr/testify/assert"
 
-	"github.com/binance-chain/tss-lib/common"
-	"github.com/binance-chain/tss-lib/crypto"
-	"github.com/binance-chain/tss-lib/crypto/paillier"
-	"github.com/binance-chain/tss-lib/ecdsa/keygen"
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/common"
+	"github.com/bnb-chain/tss-lib/v2/crypto"
+	"github.com/bnb-chain/tss-lib/v2/crypto/paillier"
+	"github.com/bnb-chain/tss-lib/v2/ecdsa/keygen"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 // Using a modulus length of 2048 is recommended in the GG18 spec
@@ -25,10 +26,17 @@ const (
 	testPaillierKeyLength = 2048
 )
 
+var (
+	Session = []byte("session")
+)
+
 func TestShareProtocol(t *testing.T) {
 	q := tss.EC().Params().N
 
-	sk, pk, err := paillier.GenerateKeyPair(testPaillierKeyLength, 10*time.Minute)
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Minute)
+	defer cancel()
+
+	sk, pk, err := paillier.GenerateKeyPair(ctx, testPaillierKeyLength)
 	assert.NoError(t, err)
 
 	a := common.GetRandomPositiveInt(q)
@@ -39,13 +47,13 @@ func TestShareProtocol(t *testing.T) {
 	NTildej, h1j, h2j, err := keygen.LoadNTildeH1H2FromTestFixture(1)
 	assert.NoError(t, err)
 
-	cA, pf, err := AliceInit(pk, a, NTildej, h1j, h2j)
+	cA, pf, err := AliceInit(tss.EC(), pk, a, NTildej, h1j, h2j)
 	assert.NoError(t, err)
 
-	_, cB, betaPrm, pfB, err := BobMid(pk, pf, b, cA, NTildei, h1i, h2i, NTildej, h1j, h2j)
+	_, cB, betaPrm, pfB, err := BobMid(Session, tss.EC(), pk, pf, b, cA, NTildei, h1i, h2i, NTildej, h1j, h2j)
 	assert.NoError(t, err)
 
-	alpha, err := AliceEnd(pk, pfB, h1i, h2i, cA, cB, NTildei, sk)
+	alpha, err := AliceEnd(Session, tss.EC(), pk, pfB, h1i, h2i, cA, cB, NTildei, sk)
 	assert.NoError(t, err)
 
 	// expect: alpha = ab + betaPrm
@@ -58,7 +66,10 @@ func TestShareProtocol(t *testing.T) {
 func TestShareProtocolWC(t *testing.T) {
 	q := tss.EC().Params().N
 
-	sk, pk, err := paillier.GenerateKeyPair(testPaillierKeyLength, 10*time.Minute)
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Minute)
+	defer cancel()
+
+	sk, pk, err := paillier.GenerateKeyPair(ctx, testPaillierKeyLength)
 	assert.NoError(t, err)
 
 	a := common.GetRandomPositiveInt(q)
@@ -70,15 +81,15 @@ func TestShareProtocolWC(t *testing.T) {
 	NTildej, h1j, h2j, err := keygen.LoadNTildeH1H2FromTestFixture(1)
 	assert.NoError(t, err)
 
-	cA, pf, err := AliceInit(pk, a, NTildej, h1j, h2j)
+	cA, pf, err := AliceInit(tss.EC(), pk, a, NTildej, h1j, h2j)
 	assert.NoError(t, err)
 
 	gBPoint, err := crypto.NewECPoint(tss.EC(), gBX, gBY)
 	assert.NoError(t, err)
-	_, cB, betaPrm, pfB, err := BobMidWC(pk, pf, b, cA, NTildei, h1i, h2i, NTildej, h1j, h2j, gBPoint)
+	_, cB, betaPrm, pfB, err := BobMidWC(Session, tss.EC(), pk, pf, b, cA, NTildei, h1i, h2i, NTildej, h1j, h2j, gBPoint)
 	assert.NoError(t, err)
 
-	alpha, err := AliceEndWC(pk, pfB, gBPoint, cA, cB, NTildei, h1i, h2i, sk)
+	alpha, err := AliceEndWC(Session, tss.EC(), pk, pfB, gBPoint, cA, cB, NTildei, h1i, h2i, sk)
 	assert.NoError(t, err)
 
 	// expect: alpha = ab + betaPrm
diff --git a/crypto/paillier/paillier.go b/crypto/paillier/paillier.go
index e2461c19..1b249b12 100644
--- a/crypto/paillier/paillier.go
+++ b/crypto/paillier/paillier.go
@@ -16,18 +16,18 @@
 package paillier
 
 import (
+	"context"
 	"errors"
 	"fmt"
 	gmath "math"
 	"math/big"
 	"runtime"
 	"strconv"
-	"time"
 
 	"github.com/otiai10/primes"
 
-	"github.com/binance-chain/tss-lib/common"
-	crypto2 "github.com/binance-chain/tss-lib/crypto"
+	"github.com/bnb-chain/tss-lib/v2/common"
+	crypto2 "github.com/bnb-chain/tss-lib/v2/crypto"
 )
 
 const (
@@ -45,6 +45,7 @@ type (
 		PublicKey
 		LambdaN, // lcm(p-1, q-1)
 		PhiN *big.Int // (p-1) * (q-1)
+		P, Q *big.Int
 	}
 
 	// Proof uses the new GenerateXs method in GG18Spec (6)
@@ -52,7 +53,8 @@ type (
 )
 
 var (
-	ErrMessageTooLong = fmt.Errorf("the message is too large or < 0")
+	ErrMessageTooLong   = fmt.Errorf("the message is too large or < 0")
+	ErrMessageMalFormed = fmt.Errorf("the message is mal-formed")
 
 	zero = big.NewInt(0)
 	one  = big.NewInt(1)
@@ -64,7 +66,7 @@ func init() {
 }
 
 // len is the length of the modulus (each prime = len / 2)
-func GenerateKeyPair(modulusBitLen int, timeout time.Duration, optionalConcurrency ...int) (privateKey *PrivateKey, publicKey *PublicKey, err error) {
+func GenerateKeyPair(ctx context.Context, modulusBitLen int, optionalConcurrency ...int) (privateKey *PrivateKey, publicKey *PublicKey, err error) {
 	var concurrency int
 	if 0 < len(optionalConcurrency) {
 		if 1 < len(optionalConcurrency) {
@@ -80,7 +82,7 @@ func GenerateKeyPair(modulusBitLen int, timeout time.Duration, optionalConcurren
 	{
 		tmp := new(big.Int)
 		for {
-			sgps, err := common.GetRandomSafePrimesConcurrent(modulusBitLen/2, 2, timeout, concurrency)
+			sgps, err := common.GetRandomSafePrimesConcurrent(ctx, modulusBitLen/2, 2, concurrency)
 			if err != nil {
 				return nil, nil, err
 			}
@@ -102,7 +104,7 @@ func GenerateKeyPair(modulusBitLen int, timeout time.Duration, optionalConcurren
 	lambdaN := new(big.Int).Div(phiN, gcd)
 
 	publicKey = &PublicKey{N: N}
-	privateKey = &PrivateKey{PublicKey: *publicKey, LambdaN: lambdaN, PhiN: phiN}
+	privateKey = &PrivateKey{PublicKey: *publicKey, LambdaN: lambdaN, PhiN: phiN, P: P, Q: Q}
 	return
 }
 
@@ -173,6 +175,10 @@ func (privateKey *PrivateKey) Decrypt(c *big.Int) (m *big.Int, err error) {
 	if c.Cmp(zero) == -1 || c.Cmp(N2) != -1 { // c < 0 || c >= N2 ?
 		return nil, ErrMessageTooLong
 	}
+	cg := new(big.Int).GCD(nil, nil, c, N2)
+	if cg.Cmp(one) == 1 {
+		return nil, ErrMessageMalFormed
+	}
 	// 1. L(u) = (c^LambdaN-1 mod N2) / N
 	Lc := L(new(big.Int).Exp(c, privateKey.LambdaN, N2), privateKey.N)
 	// 2. L(u) = (Gamma^LambdaN-1 mod N2) / N
diff --git a/crypto/paillier/paillier_test.go b/crypto/paillier/paillier_test.go
index 053966ca..a9ebff73 100644
--- a/crypto/paillier/paillier_test.go
+++ b/crypto/paillier/paillier_test.go
@@ -7,16 +7,17 @@
 package paillier_test
 
 import (
+	"context"
 	"math/big"
 	"testing"
 	"time"
 
 	"github.com/stretchr/testify/assert"
 
-	"github.com/binance-chain/tss-lib/common"
-	"github.com/binance-chain/tss-lib/crypto"
-	. "github.com/binance-chain/tss-lib/crypto/paillier"
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/common"
+	"github.com/bnb-chain/tss-lib/v2/crypto"
+	. "github.com/bnb-chain/tss-lib/v2/crypto/paillier"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 // Using a modulus length of 2048 is recommended in the GG18 spec
@@ -33,8 +34,12 @@ func setUp(t *testing.T) {
 	if privateKey != nil && publicKey != nil {
 		return
 	}
+
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Minute)
+	defer cancel()
+
 	var err error
-	privateKey, publicKey, err = GenerateKeyPair(testPaillierKeyLength, 10*time.Minute)
+	privateKey, publicKey, err = GenerateKeyPair(ctx, testPaillierKeyLength)
 	assert.NoError(t, err)
 }
 
@@ -64,6 +69,10 @@ func TestEncryptDecrypt(t *testing.T) {
 	assert.NoError(t, err)
 	assert.Equal(t, 0, exp.Cmp(ret),
 		"wrong decryption ", ret, " is not ", exp)
+
+	cypher = new(big.Int).Set(privateKey.N)
+	_, err = privateKey.Decrypt(cypher)
+	assert.Error(t, err)
 }
 
 func TestHomoMul(t *testing.T) {
diff --git a/crypto/schnorr/schnorr_proof.go b/crypto/schnorr/schnorr_proof.go
index 129509ab..3a4b6aa8 100644
--- a/crypto/schnorr/schnorr_proof.go
+++ b/crypto/schnorr/schnorr_proof.go
@@ -10,9 +10,8 @@ import (
 	"errors"
 	"math/big"
 
-	"github.com/binance-chain/tss-lib/common"
-	"github.com/binance-chain/tss-lib/crypto"
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/common"
+	"github.com/bnb-chain/tss-lib/v2/crypto"
 )
 
 type (
@@ -28,20 +27,21 @@ type (
 )
 
 // NewZKProof constructs a new Schnorr ZK proof of knowledge of the discrete logarithm (GG18Spec Fig. 16)
-func NewZKProof(x *big.Int, X *crypto.ECPoint) (*ZKProof, error) {
+func NewZKProof(Session []byte, x *big.Int, X *crypto.ECPoint) (*ZKProof, error) {
 	if x == nil || X == nil || !X.ValidateBasic() {
 		return nil, errors.New("ZKProof constructor received nil or invalid value(s)")
 	}
-	ecParams := tss.EC().Params()
+	ec := X.Curve()
+	ecParams := ec.Params()
 	q := ecParams.N
-	g := crypto.NewECPointNoCurveCheck(tss.EC(), ecParams.Gx, ecParams.Gy) // already on the curve.
+	g := crypto.NewECPointNoCurveCheck(ec, ecParams.Gx, ecParams.Gy) // already on the curve.
 
 	a := common.GetRandomPositiveInt(q)
-	alpha := crypto.ScalarBaseMult(tss.EC(), a)
+	alpha := crypto.ScalarBaseMult(ec, a)
 
 	var c *big.Int
 	{
-		cHash := common.SHA512_256i(X.X(), X.Y(), g.X(), g.Y(), alpha.X(), alpha.Y())
+		cHash := common.SHA512_256i_TAGGED(Session, X.X(), X.Y(), g.X(), g.Y(), alpha.X(), alpha.Y())
 		c = common.RejectionSample(q, cHash)
 	}
 	t := new(big.Int).Mul(c, x)
@@ -51,29 +51,27 @@ func NewZKProof(x *big.Int, X *crypto.ECPoint) (*ZKProof, error) {
 }
 
 // NewZKProof verifies a new Schnorr ZK proof of knowledge of the discrete logarithm (GG18Spec Fig. 16)
-func (pf *ZKProof) Verify(X *crypto.ECPoint) bool {
+func (pf *ZKProof) Verify(Session []byte, X *crypto.ECPoint) bool {
 	if pf == nil || !pf.ValidateBasic() {
 		return false
 	}
-	ecParams := tss.EC().Params()
+	ec := X.Curve()
+	ecParams := ec.Params()
 	q := ecParams.N
-	g := crypto.NewECPointNoCurveCheck(tss.EC(), ecParams.Gx, ecParams.Gy)
+	g := crypto.NewECPointNoCurveCheck(ec, ecParams.Gx, ecParams.Gy)
 
 	var c *big.Int
 	{
-		cHash := common.SHA512_256i(X.X(), X.Y(), g.X(), g.Y(), pf.Alpha.X(), pf.Alpha.Y())
+		cHash := common.SHA512_256i_TAGGED(Session, X.X(), X.Y(), g.X(), g.Y(), pf.Alpha.X(), pf.Alpha.Y())
 		c = common.RejectionSample(q, cHash)
 	}
-	tG := crypto.ScalarBaseMult(tss.EC(), pf.T)
+	tG := crypto.ScalarBaseMult(ec, pf.T)
 	Xc := X.ScalarMult(c)
 	aXc, err := pf.Alpha.Add(Xc)
 	if err != nil {
 		return false
 	}
-	if aXc.X().Cmp(tG.X()) != 0 || aXc.Y().Cmp(tG.Y()) != 0 {
-		return false
-	}
-	return true
+	return aXc.X().Cmp(tG.X()) == 0 && aXc.Y().Cmp(tG.Y()) == 0
 }
 
 func (pf *ZKProof) ValidateBasic() bool {
@@ -81,22 +79,23 @@ func (pf *ZKProof) ValidateBasic() bool {
 }
 
 // NewZKProof constructs a new Schnorr ZK proof of knowledge s_i, l_i such that V_i = R^s_i, g^l_i (GG18Spec Fig. 17)
-func NewZKVProof(V, R *crypto.ECPoint, s, l *big.Int) (*ZKVProof, error) {
+func NewZKVProof(Session []byte, V, R *crypto.ECPoint, s, l *big.Int) (*ZKVProof, error) {
 	if V == nil || R == nil || s == nil || l == nil || !V.ValidateBasic() || !R.ValidateBasic() {
 		return nil, errors.New("ZKVProof constructor received nil value(s)")
 	}
-	ecParams := tss.EC().Params()
+	ec := V.Curve()
+	ecParams := ec.Params()
 	q := ecParams.N
-	g := crypto.NewECPointNoCurveCheck(tss.EC(), ecParams.Gx, ecParams.Gy)
+	g := crypto.NewECPointNoCurveCheck(ec, ecParams.Gx, ecParams.Gy)
 
 	a, b := common.GetRandomPositiveInt(q), common.GetRandomPositiveInt(q)
 	aR := R.ScalarMult(a)
-	bG := crypto.ScalarBaseMult(tss.EC(), b)
+	bG := crypto.ScalarBaseMult(ec, b)
 	alpha, _ := aR.Add(bG) // already on the curve.
 
 	var c *big.Int
 	{
-		cHash := common.SHA512_256i(V.X(), V.Y(), R.X(), R.Y(), g.X(), g.Y(), alpha.X(), alpha.Y())
+		cHash := common.SHA512_256i_TAGGED(Session, V.X(), V.Y(), R.X(), R.Y(), g.X(), g.Y(), alpha.X(), alpha.Y())
 		c = common.RejectionSample(q, cHash)
 	}
 	modQ := common.ModInt(q)
@@ -106,21 +105,22 @@ func NewZKVProof(V, R *crypto.ECPoint, s, l *big.Int) (*ZKVProof, error) {
 	return &ZKVProof{Alpha: alpha, T: t, U: u}, nil
 }
 
-func (pf *ZKVProof) Verify(V, R *crypto.ECPoint) bool {
+func (pf *ZKVProof) Verify(Session []byte, V, R *crypto.ECPoint) bool {
 	if pf == nil || !pf.ValidateBasic() {
 		return false
 	}
-	ecParams := tss.EC().Params()
+	ec := V.Curve()
+	ecParams := ec.Params()
 	q := ecParams.N
-	g := crypto.NewECPointNoCurveCheck(tss.EC(), ecParams.Gx, ecParams.Gy)
+	g := crypto.NewECPointNoCurveCheck(ec, ecParams.Gx, ecParams.Gy)
 
 	var c *big.Int
 	{
-		cHash := common.SHA512_256i(V.X(), V.Y(), R.X(), R.Y(), g.X(), g.Y(), pf.Alpha.X(), pf.Alpha.Y())
+		cHash := common.SHA512_256i_TAGGED(Session, V.X(), V.Y(), R.X(), R.Y(), g.X(), g.Y(), pf.Alpha.X(), pf.Alpha.Y())
 		c = common.RejectionSample(q, cHash)
 	}
 	tR := R.ScalarMult(pf.T)
-	uG := crypto.ScalarBaseMult(tss.EC(), pf.U)
+	uG := crypto.ScalarBaseMult(ec, pf.U)
 	tRuG, _ := tR.Add(uG) // already on the curve.
 
 	Vc := V.ScalarMult(c)
@@ -128,10 +128,7 @@ func (pf *ZKVProof) Verify(V, R *crypto.ECPoint) bool {
 	if err != nil {
 		return false
 	}
-	if tRuG.X().Cmp(aVc.X()) != 0 || tRuG.Y().Cmp(aVc.Y()) != 0 {
-		return false
-	}
-	return true
+	return tRuG.X().Cmp(aVc.X()) == 0 && tRuG.Y().Cmp(aVc.Y()) == 0
 }
 
 func (pf *ZKVProof) ValidateBasic() bool {
diff --git a/crypto/schnorr/schnorr_proof_test.go b/crypto/schnorr/schnorr_proof_test.go
index b097f93a..fbf633ea 100644
--- a/crypto/schnorr/schnorr_proof_test.go
+++ b/crypto/schnorr/schnorr_proof_test.go
@@ -11,17 +11,21 @@ import (
 
 	"github.com/stretchr/testify/assert"
 
-	"github.com/binance-chain/tss-lib/common"
-	"github.com/binance-chain/tss-lib/crypto"
-	. "github.com/binance-chain/tss-lib/crypto/schnorr"
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/common"
+	"github.com/bnb-chain/tss-lib/v2/crypto"
+	. "github.com/bnb-chain/tss-lib/v2/crypto/schnorr"
+	"github.com/bnb-chain/tss-lib/v2/tss"
+)
+
+var (
+	Session = []byte("session")
 )
 
 func TestSchnorrProof(t *testing.T) {
 	q := tss.EC().Params().N
 	u := common.GetRandomPositiveInt(q)
 	uG := crypto.ScalarBaseMult(tss.EC(), u)
-	proof, _ := NewZKProof(u, uG)
+	proof, _ := NewZKProof(Session, u, uG)
 
 	assert.True(t, proof.Alpha.IsOnCurve())
 	assert.NotZero(t, proof.Alpha.X())
@@ -34,8 +38,8 @@ func TestSchnorrProofVerify(t *testing.T) {
 	u := common.GetRandomPositiveInt(q)
 	X := crypto.ScalarBaseMult(tss.EC(), u)
 
-	proof, _ := NewZKProof(u, X)
-	res := proof.Verify(X)
+	proof, _ := NewZKProof(Session, u, X)
+	res := proof.Verify(Session, X)
 
 	assert.True(t, res, "verify result must be true")
 }
@@ -47,8 +51,8 @@ func TestSchnorrProofVerifyBadX(t *testing.T) {
 	X := crypto.ScalarBaseMult(tss.EC(), u)
 	X2 := crypto.ScalarBaseMult(tss.EC(), u2)
 
-	proof, _ := NewZKProof(u2, X2)
-	res := proof.Verify(X)
+	proof, _ := NewZKProof(Session, u2, X2)
+	res := proof.Verify(Session, X)
 
 	assert.False(t, res, "verify result must be false")
 }
@@ -63,8 +67,8 @@ func TestSchnorrVProofVerify(t *testing.T) {
 	lG := crypto.ScalarBaseMult(tss.EC(), l)
 	V, _ := Rs.Add(lG)
 
-	proof, _ := NewZKVProof(V, R, s, l)
-	res := proof.Verify(V, R)
+	proof, _ := NewZKVProof(Session, V, R, s, l)
+	res := proof.Verify(Session, V, R)
 
 	assert.True(t, res, "verify result must be true")
 }
@@ -78,10 +82,10 @@ func TestSchnorrVProofVerifyBadPartialV(t *testing.T) {
 	Rs := R.ScalarMult(s)
 	V := Rs
 
-	proof, _ := NewZKVProof(V, R, s, l)
-	res := proof.Verify(V, R)
+	proof, _ := NewZKVProof(Session, V, R, s, l)
+	res := proof.Verify(Session, V, R)
 
-	assert.False(t, res, "verify result must be true")
+	assert.False(t, res, "verify result must be false")
 }
 
 func TestSchnorrVProofVerifyBadS(t *testing.T) {
@@ -95,8 +99,8 @@ func TestSchnorrVProofVerifyBadS(t *testing.T) {
 	lG := crypto.ScalarBaseMult(tss.EC(), l)
 	V, _ := Rs.Add(lG)
 
-	proof, _ := NewZKVProof(V, R, s2, l)
-	res := proof.Verify(V, R)
+	proof, _ := NewZKVProof(Session, V, R, s2, l)
+	res := proof.Verify(Session, V, R)
 
-	assert.False(t, res, "verify result must be true")
+	assert.False(t, res, "verify result must be false")
 }
diff --git a/crypto/utils.go b/crypto/utils.go
index 71ee5190..5448113a 100644
--- a/crypto/utils.go
+++ b/crypto/utils.go
@@ -10,7 +10,7 @@ import (
 	"fmt"
 	"math/big"
 
-	"github.com/binance-chain/tss-lib/common"
+	"github.com/bnb-chain/tss-lib/v2/common"
 )
 
 func GenerateNTildei(safePrimes [2]*big.Int) (NTildei, h1i, h2i *big.Int, err error) {
diff --git a/crypto/vss/feldman_vss.go b/crypto/vss/feldman_vss.go
index 1262fd1b..21c49714 100644
--- a/crypto/vss/feldman_vss.go
+++ b/crypto/vss/feldman_vss.go
@@ -11,13 +11,13 @@
 package vss
 
 import (
+	"crypto/elliptic"
 	"errors"
 	"fmt"
 	"math/big"
 
-	"github.com/binance-chain/tss-lib/common"
-	"github.com/binance-chain/tss-lib/crypto"
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/common"
+	"github.com/bnb-chain/tss-lib/v2/crypto"
 )
 
 type (
@@ -39,65 +39,84 @@ var (
 	one  = big.NewInt(1)
 )
 
+// Check share ids of Shamir's Secret Sharing, return error if duplicate or 0 value found
+func CheckIndexes(ec elliptic.Curve, indexes []*big.Int) ([]*big.Int, error) {
+	visited := make(map[string]struct{})
+	for _, v := range indexes {
+		vMod := new(big.Int).Mod(v, ec.Params().N)
+		if vMod.Cmp(zero) == 0 {
+			return nil, errors.New("party index should not be 0")
+		}
+		vModStr := vMod.String()
+		if _, ok := visited[vModStr]; ok {
+			return nil, fmt.Errorf("duplicate indexes %s", vModStr)
+		}
+		visited[vModStr] = struct{}{}
+	}
+	return indexes, nil
+}
+
 // Returns a new array of secret shares created by Shamir's Secret Sharing Algorithm,
 // requiring a minimum number of shares to recreate, of length shares, from the input secret
-//
-func Create(threshold int, secret *big.Int, indexes []*big.Int) (Vs, Shares, error) {
+func Create(ec elliptic.Curve, threshold int, secret *big.Int, indexes []*big.Int) (Vs, Shares, error) {
 	if secret == nil || indexes == nil {
 		return nil, nil, fmt.Errorf("vss secret or indexes == nil: %v %v", secret, indexes)
 	}
 	if threshold < 1 {
 		return nil, nil, errors.New("vss threshold < 1")
 	}
+
+	ids, err := CheckIndexes(ec, indexes)
+	if err != nil {
+		return nil, nil, err
+	}
+
 	num := len(indexes)
 	if num < threshold {
 		return nil, nil, ErrNumSharesBelowThreshold
 	}
 
-	poly := samplePolynomial(threshold, secret)
+	poly := samplePolynomial(ec, threshold, secret)
 	poly[0] = secret // becomes sigma*G in v
 	v := make(Vs, len(poly))
 	for i, ai := range poly {
-		v[i] = crypto.ScalarBaseMult(tss.EC(), ai)
+		v[i] = crypto.ScalarBaseMult(ec, ai)
 	}
 
 	shares := make(Shares, num)
 	for i := 0; i < num; i++ {
-		if indexes[i].Cmp(big.NewInt(0)) == 0 {
-			return nil, nil, fmt.Errorf("party index should not be 0")
-		}
-		share := evaluatePolynomial(threshold, poly, indexes[i])
-		shares[i] = &Share{Threshold: threshold, ID: indexes[i], Share: share}
+		share := evaluatePolynomial(ec, threshold, poly, ids[i])
+		shares[i] = &Share{Threshold: threshold, ID: ids[i], Share: share}
 	}
 	return v, shares, nil
 }
 
-func (share *Share) Verify(threshold int, vs Vs) bool {
+func (share *Share) Verify(ec elliptic.Curve, threshold int, vs Vs) bool {
 	if share.Threshold != threshold || vs == nil {
 		return false
 	}
 	var err error
-	modQ := common.ModInt(tss.EC().Params().N)
+	modQ := common.ModInt(ec.Params().N)
 	v, t := vs[0], one // YRO : we need to have our accumulator outside of the loop
 	for j := 1; j <= threshold; j++ {
 		// t = k_i^j
 		t = modQ.Mul(t, share.ID)
 		// v = v * v_j^t
-		vjt := vs[j].SetCurve(tss.EC()).ScalarMult(t)
-		v, err = v.SetCurve(tss.EC()).Add(vjt)
+		vjt := vs[j].SetCurve(ec).ScalarMult(t)
+		v, err = v.SetCurve(ec).Add(vjt)
 		if err != nil {
 			return false
 		}
 	}
-	sigmaGi := crypto.ScalarBaseMult(tss.EC(), share.Share)
+	sigmaGi := crypto.ScalarBaseMult(ec, share.Share)
 	return sigmaGi.Equals(v)
 }
 
-func (shares Shares) ReConstruct() (secret *big.Int, err error) {
+func (shares Shares) ReConstruct(ec elliptic.Curve) (secret *big.Int, err error) {
 	if shares != nil && shares[0].Threshold > len(shares) {
 		return nil, ErrNumSharesBelowThreshold
 	}
-	modN := common.ModInt(tss.EC().Params().N)
+	modN := common.ModInt(ec.Params().N)
 
 	// x coords
 	xs := make([]*big.Int, 0)
@@ -125,8 +144,8 @@ func (shares Shares) ReConstruct() (secret *big.Int, err error) {
 	return secret, nil
 }
 
-func samplePolynomial(threshold int, secret *big.Int) []*big.Int {
-	q := tss.EC().Params().N
+func samplePolynomial(ec elliptic.Curve, threshold int, secret *big.Int) []*big.Int {
+	q := ec.Params().N
 	v := make([]*big.Int, threshold+1)
 	v[0] = secret
 	for i := 1; i <= threshold; i++ {
@@ -138,10 +157,10 @@ func samplePolynomial(threshold int, secret *big.Int) []*big.Int {
 
 // Evauluates a polynomial with coefficients such that:
 // evaluatePolynomial([a, b, c, d], x):
-// 		returns a + bx + cx^2 + dx^3
 //
-func evaluatePolynomial(threshold int, v []*big.Int, id *big.Int) (result *big.Int) {
-	q := tss.EC().Params().N
+//	returns a + bx + cx^2 + dx^3
+func evaluatePolynomial(ec elliptic.Curve, threshold int, v []*big.Int, id *big.Int) (result *big.Int) {
+	q := ec.Params().N
 	modQ := common.ModInt(q)
 	result = new(big.Int).Set(v[0])
 	X := big.NewInt(int64(1))
diff --git a/crypto/vss/feldman_vss_test.go b/crypto/vss/feldman_vss_test.go
index ac5e736b..ef55f685 100644
--- a/crypto/vss/feldman_vss_test.go
+++ b/crypto/vss/feldman_vss_test.go
@@ -12,11 +12,37 @@ import (
 
 	"github.com/stretchr/testify/assert"
 
-	"github.com/binance-chain/tss-lib/common"
-	. "github.com/binance-chain/tss-lib/crypto/vss"
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/common"
+	. "github.com/bnb-chain/tss-lib/v2/crypto/vss"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
+func TestCheckIndexesDup(t *testing.T) {
+	indexes := make([]*big.Int, 0)
+	for i := 0; i < 1000; i++ {
+		indexes = append(indexes, common.GetRandomPositiveInt(tss.EC().Params().N))
+	}
+	_, e := CheckIndexes(tss.EC(), indexes)
+	assert.NoError(t, e)
+
+	indexes = append(indexes, indexes[99])
+	_, e = CheckIndexes(tss.EC(), indexes)
+	assert.Error(t, e)
+}
+
+func TestCheckIndexesZero(t *testing.T) {
+	indexes := make([]*big.Int, 0)
+	for i := 0; i < 1000; i++ {
+		indexes = append(indexes, common.GetRandomPositiveInt(tss.EC().Params().N))
+	}
+	_, e := CheckIndexes(tss.EC(), indexes)
+	assert.NoError(t, e)
+
+	indexes = append(indexes, tss.EC().Params().N)
+	_, e = CheckIndexes(tss.EC(), indexes)
+	assert.Error(t, e)
+}
+
 func TestCreate(t *testing.T) {
 	num, threshold := 5, 3
 
@@ -27,7 +53,7 @@ func TestCreate(t *testing.T) {
 		ids = append(ids, common.GetRandomPositiveInt(tss.EC().Params().N))
 	}
 
-	vs, _, err := Create(threshold, secret, ids)
+	vs, _, err := Create(tss.EC(), threshold, secret, ids)
 	assert.Nil(t, err)
 
 	assert.Equal(t, threshold+1, len(vs))
@@ -55,11 +81,11 @@ func TestVerify(t *testing.T) {
 		ids = append(ids, common.GetRandomPositiveInt(tss.EC().Params().N))
 	}
 
-	vs, shares, err := Create(threshold, secret, ids)
+	vs, shares, err := Create(tss.EC(), threshold, secret, ids)
 	assert.NoError(t, err)
 
 	for i := 0; i < num; i++ {
-		assert.True(t, shares[i].Verify(threshold, vs))
+		assert.True(t, shares[i].Verify(tss.EC(), threshold, vs))
 	}
 }
 
@@ -73,18 +99,18 @@ func TestReconstruct(t *testing.T) {
 		ids = append(ids, common.GetRandomPositiveInt(tss.EC().Params().N))
 	}
 
-	_, shares, err := Create(threshold, secret, ids)
+	_, shares, err := Create(tss.EC(), threshold, secret, ids)
 	assert.NoError(t, err)
 
-	secret2, err2 := shares[:threshold-1].ReConstruct()
+	secret2, err2 := shares[:threshold-1].ReConstruct(tss.EC())
 	assert.Error(t, err2) // not enough shares to satisfy the threshold
 	assert.Nil(t, secret2)
 
-	secret3, err3 := shares[:threshold].ReConstruct()
+	secret3, err3 := shares[:threshold].ReConstruct(tss.EC())
 	assert.NoError(t, err3)
 	assert.NotZero(t, secret3)
 
-	secret4, err4 := shares[:num].ReConstruct()
+	secret4, err4 := shares[:num].ReConstruct(tss.EC())
 	assert.NoError(t, err4)
 	assert.NotZero(t, secret4)
 }
diff --git a/ecdsa/keygen/dln_verifier.go b/ecdsa/keygen/dln_verifier.go
new file mode 100644
index 00000000..c6ec68d7
--- /dev/null
+++ b/ecdsa/keygen/dln_verifier.go
@@ -0,0 +1,73 @@
+// Copyright © 2019 Binance
+//
+// This file is part of Binance. The full Binance copyright notice, including
+// terms governing use, modification, and redistribution, is contained in the
+// file LICENSE at the root of the source code distribution tree.
+
+package keygen
+
+import (
+	"errors"
+	"math/big"
+
+	"github.com/bnb-chain/tss-lib/v2/crypto/dlnproof"
+)
+
+type DlnProofVerifier struct {
+	semaphore chan interface{}
+}
+
+type message interface {
+	UnmarshalDLNProof1() (*dlnproof.Proof, error)
+	UnmarshalDLNProof2() (*dlnproof.Proof, error)
+}
+
+func NewDlnProofVerifier(concurrency int) *DlnProofVerifier {
+	if concurrency == 0 {
+		panic(errors.New("NewDlnProofverifier: concurrency level must not be zero"))
+	}
+
+	semaphore := make(chan interface{}, concurrency)
+
+	return &DlnProofVerifier{
+		semaphore: semaphore,
+	}
+}
+
+func (dpv *DlnProofVerifier) VerifyDLNProof1(
+	m message,
+	h1, h2, n *big.Int,
+	onDone func(bool),
+) {
+	dpv.semaphore <- struct{}{}
+	go func() {
+		defer func() { <-dpv.semaphore }()
+
+		dlnProof, err := m.UnmarshalDLNProof1()
+		if err != nil {
+			onDone(false)
+			return
+		}
+
+		onDone(dlnProof.Verify(h1, h2, n))
+	}()
+}
+
+func (dpv *DlnProofVerifier) VerifyDLNProof2(
+	m message,
+	h1, h2, n *big.Int,
+	onDone func(bool),
+) {
+	dpv.semaphore <- struct{}{}
+	go func() {
+		defer func() { <-dpv.semaphore }()
+
+		dlnProof, err := m.UnmarshalDLNProof2()
+		if err != nil {
+			onDone(false)
+			return
+		}
+
+		onDone(dlnProof.Verify(h1, h2, n))
+	}()
+}
diff --git a/ecdsa/keygen/dln_verifier_test.go b/ecdsa/keygen/dln_verifier_test.go
new file mode 100644
index 00000000..89d76bba
--- /dev/null
+++ b/ecdsa/keygen/dln_verifier_test.go
@@ -0,0 +1,241 @@
+// Copyright © 2019 Binance
+//
+// This file is part of Binance. The full Binance copyright notice, including
+// terms governing use, modification, and redistribution, is contained in the
+// file LICENSE at the root of the source code distribution tree.
+
+package keygen
+
+import (
+	"math/big"
+	"runtime"
+	"testing"
+
+	"github.com/bnb-chain/tss-lib/v2/crypto/dlnproof"
+)
+
+func BenchmarkDlnProof_Verify(b *testing.B) {
+	localPartySaveData, _, err := LoadKeygenTestFixtures(1)
+	if err != nil {
+		b.Fatal(err)
+	}
+
+	params := localPartySaveData[0].LocalPreParams
+
+	proof := dlnproof.NewDLNProof(
+		params.H1i,
+		params.H2i,
+		params.Alpha,
+		params.P,
+		params.Q,
+		params.NTildei,
+	)
+
+	b.ResetTimer()
+	for n := 0; n < b.N; n++ {
+		proof.Verify(params.H1i, params.H2i, params.NTildei)
+	}
+}
+
+func BenchmarkDlnVerifier_VerifyProof1(b *testing.B) {
+	preParams, proof := prepareProofB(b)
+	message := &KGRound1Message{
+		Dlnproof_1: proof,
+	}
+
+	verifier := NewDlnProofVerifier(runtime.GOMAXPROCS(0))
+
+	b.ResetTimer()
+	for n := 0; n < b.N; n++ {
+		resultChan := make(chan bool)
+		verifier.VerifyDLNProof1(message, preParams.H1i, preParams.H2i, preParams.NTildei, func(result bool) {
+			resultChan <- result
+		})
+		<-resultChan
+	}
+}
+
+func BenchmarkDlnVerifier_VerifyProof2(b *testing.B) {
+	preParams, proof := prepareProofB(b)
+	message := &KGRound1Message{
+		Dlnproof_2: proof,
+	}
+
+	verifier := NewDlnProofVerifier(runtime.GOMAXPROCS(0))
+
+	b.ResetTimer()
+	for n := 0; n < b.N; n++ {
+		resultChan := make(chan bool)
+		verifier.VerifyDLNProof2(message, preParams.H1i, preParams.H2i, preParams.NTildei, func(result bool) {
+			resultChan <- result
+		})
+		<-resultChan
+	}
+}
+
+func TestVerifyDLNProof1_Success(t *testing.T) {
+	preParams, proof := prepareProofT(t)
+	message := &KGRound1Message{
+		Dlnproof_1: proof,
+	}
+
+	verifier := NewDlnProofVerifier(runtime.GOMAXPROCS(0))
+
+	resultChan := make(chan bool)
+
+	verifier.VerifyDLNProof1(message, preParams.H1i, preParams.H2i, preParams.NTildei, func(result bool) {
+		resultChan <- result
+	})
+
+	success := <-resultChan
+	if !success {
+		t.Fatal("expected positive verification")
+	}
+}
+
+func TestVerifyDLNProof1_MalformedMessage(t *testing.T) {
+	preParams, proof := prepareProofT(t)
+	message := &KGRound1Message{
+		Dlnproof_1: proof[:len(proof)-1], // truncate
+	}
+
+	verifier := NewDlnProofVerifier(runtime.GOMAXPROCS(0))
+
+	resultChan := make(chan bool)
+
+	verifier.VerifyDLNProof1(message, preParams.H1i, preParams.H2i, preParams.NTildei, func(result bool) {
+		resultChan <- result
+	})
+
+	success := <-resultChan
+	if success {
+		t.Fatal("expected negative verification")
+	}
+}
+
+func TestVerifyDLNProof1_IncorrectProof(t *testing.T) {
+	preParams, proof := prepareProofT(t)
+	message := &KGRound1Message{
+		Dlnproof_1: proof,
+	}
+
+	verifier := NewDlnProofVerifier(runtime.GOMAXPROCS(0))
+
+	resultChan := make(chan bool)
+
+	wrongH1i := preParams.H1i.Sub(preParams.H1i, big.NewInt(1))
+	verifier.VerifyDLNProof1(message, wrongH1i, preParams.H2i, preParams.NTildei, func(result bool) {
+		resultChan <- result
+	})
+
+	success := <-resultChan
+	if success {
+		t.Fatal("expected negative verification")
+	}
+}
+
+func TestVerifyDLNProof2_Success(t *testing.T) {
+	preParams, proof := prepareProofT(t)
+	message := &KGRound1Message{
+		Dlnproof_2: proof,
+	}
+
+	verifier := NewDlnProofVerifier(runtime.GOMAXPROCS(0))
+
+	resultChan := make(chan bool)
+
+	verifier.VerifyDLNProof2(message, preParams.H1i, preParams.H2i, preParams.NTildei, func(result bool) {
+		resultChan <- result
+	})
+
+	success := <-resultChan
+	if !success {
+		t.Fatal("expected positive verification")
+	}
+}
+
+func TestVerifyDLNProof2_MalformedMessage(t *testing.T) {
+	preParams, proof := prepareProofT(t)
+	message := &KGRound1Message{
+		Dlnproof_2: proof[:len(proof)-1], // truncate
+	}
+
+	verifier := NewDlnProofVerifier(runtime.GOMAXPROCS(0))
+
+	resultChan := make(chan bool)
+
+	verifier.VerifyDLNProof2(message, preParams.H1i, preParams.H2i, preParams.NTildei, func(result bool) {
+		resultChan <- result
+	})
+
+	success := <-resultChan
+	if success {
+		t.Fatal("expected negative verification")
+	}
+}
+
+func TestVerifyDLNProof2_IncorrectProof(t *testing.T) {
+	preParams, proof := prepareProofT(t)
+	message := &KGRound1Message{
+		Dlnproof_2: proof,
+	}
+
+	verifier := NewDlnProofVerifier(runtime.GOMAXPROCS(0))
+
+	resultChan := make(chan bool)
+
+	wrongH2i := preParams.H2i.Add(preParams.H2i, big.NewInt(1))
+	verifier.VerifyDLNProof2(message, preParams.H1i, wrongH2i, preParams.NTildei, func(result bool) {
+		resultChan <- result
+	})
+
+	success := <-resultChan
+	if success {
+		t.Fatal("expected negative verification")
+	}
+}
+
+func prepareProofT(t *testing.T) (*LocalPreParams, [][]byte) {
+	preParams, serialized, err := prepareProof()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	return preParams, serialized
+}
+
+func prepareProofB(b *testing.B) (*LocalPreParams, [][]byte) {
+	preParams, serialized, err := prepareProof()
+	if err != nil {
+		b.Fatal(err)
+	}
+
+	return preParams, serialized
+}
+
+func prepareProof() (*LocalPreParams, [][]byte, error) {
+	localPartySaveData, _, err := LoadKeygenTestFixtures(1)
+	if err != nil {
+		return nil, [][]byte{}, err
+	}
+
+	preParams := localPartySaveData[0].LocalPreParams
+
+	proof := dlnproof.NewDLNProof(
+		preParams.H1i,
+		preParams.H2i,
+		preParams.Alpha,
+		preParams.P,
+		preParams.Q,
+		preParams.NTildei,
+	)
+
+	serialized, err := proof.Serialize()
+	if err != nil {
+		if err != nil {
+			return nil, [][]byte{}, err
+		}
+	}
+
+	return &preParams, serialized, nil
+}
diff --git a/ecdsa/keygen/ecdsa-keygen.pb.go b/ecdsa/keygen/ecdsa-keygen.pb.go
index e65faeae..5029072e 100644
--- a/ecdsa/keygen/ecdsa-keygen.pb.go
+++ b/ecdsa/keygen/ecdsa-keygen.pb.go
@@ -1,263 +1,421 @@
+// Copyright © 2019 Binance
+//
+// This file is part of Binance. The full Binance copyright notice, including
+// terms governing use, modification, and redistribution, is contained in the
+// file LICENSE at the root of the source code distribution tree.
+
 // Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.31.0
+// 	protoc        v3.20.3
 // source: protob/ecdsa-keygen.proto
 
 package keygen
 
 import (
-	fmt "fmt"
-	proto "github.com/golang/protobuf/proto"
-	math "math"
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
 )
 
-// Reference imports to suppress errors if they are not otherwise used.
-var _ = proto.Marshal
-var _ = fmt.Errorf
-var _ = math.Inf
-
-// This is a compile-time assertion to ensure that this generated file
-// is compatible with the proto package it is being compiled against.
-// A compilation error at this line likely means your copy of the
-// proto package needs to be updated.
-const _ = proto.ProtoPackageIsVersion3 // please upgrade the proto package
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
 
-//
 // Represents a BROADCAST message sent during Round 1 of the ECDSA TSS keygen protocol.
 type KGRound1Message struct {
-	Commitment           []byte   `protobuf:"bytes,1,opt,name=commitment,proto3" json:"commitment,omitempty"`
-	PaillierN            []byte   `protobuf:"bytes,2,opt,name=paillier_n,json=paillierN,proto3" json:"paillier_n,omitempty"`
-	NTilde               []byte   `protobuf:"bytes,3,opt,name=n_tilde,json=nTilde,proto3" json:"n_tilde,omitempty"`
-	H1                   []byte   `protobuf:"bytes,4,opt,name=h1,proto3" json:"h1,omitempty"`
-	H2                   []byte   `protobuf:"bytes,5,opt,name=h2,proto3" json:"h2,omitempty"`
-	Dlnproof_1           [][]byte `protobuf:"bytes,6,rep,name=dlnproof_1,json=dlnproof1,proto3" json:"dlnproof_1,omitempty"`
-	Dlnproof_2           [][]byte `protobuf:"bytes,7,rep,name=dlnproof_2,json=dlnproof2,proto3" json:"dlnproof_2,omitempty"`
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
-}
-
-func (m *KGRound1Message) Reset()         { *m = KGRound1Message{} }
-func (m *KGRound1Message) String() string { return proto.CompactTextString(m) }
-func (*KGRound1Message) ProtoMessage()    {}
-func (*KGRound1Message) Descriptor() ([]byte, []int) {
-	return fileDescriptor_1a2e19e981cdbb01, []int{0}
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Commitment []byte   `protobuf:"bytes,1,opt,name=commitment,proto3" json:"commitment,omitempty"`
+	PaillierN  []byte   `protobuf:"bytes,2,opt,name=paillier_n,json=paillierN,proto3" json:"paillier_n,omitempty"`
+	NTilde     []byte   `protobuf:"bytes,3,opt,name=n_tilde,json=nTilde,proto3" json:"n_tilde,omitempty"`
+	H1         []byte   `protobuf:"bytes,4,opt,name=h1,proto3" json:"h1,omitempty"`
+	H2         []byte   `protobuf:"bytes,5,opt,name=h2,proto3" json:"h2,omitempty"`
+	Dlnproof_1 [][]byte `protobuf:"bytes,6,rep,name=dlnproof_1,json=dlnproof1,proto3" json:"dlnproof_1,omitempty"`
+	Dlnproof_2 [][]byte `protobuf:"bytes,7,rep,name=dlnproof_2,json=dlnproof2,proto3" json:"dlnproof_2,omitempty"`
+}
+
+func (x *KGRound1Message) Reset() {
+	*x = KGRound1Message{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_protob_ecdsa_keygen_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
 }
 
-func (m *KGRound1Message) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_KGRound1Message.Unmarshal(m, b)
-}
-func (m *KGRound1Message) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_KGRound1Message.Marshal(b, m, deterministic)
+func (x *KGRound1Message) String() string {
+	return protoimpl.X.MessageStringOf(x)
 }
-func (m *KGRound1Message) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_KGRound1Message.Merge(m, src)
-}
-func (m *KGRound1Message) XXX_Size() int {
-	return xxx_messageInfo_KGRound1Message.Size(m)
-}
-func (m *KGRound1Message) XXX_DiscardUnknown() {
-	xxx_messageInfo_KGRound1Message.DiscardUnknown(m)
+
+func (*KGRound1Message) ProtoMessage() {}
+
+func (x *KGRound1Message) ProtoReflect() protoreflect.Message {
+	mi := &file_protob_ecdsa_keygen_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
 }
 
-var xxx_messageInfo_KGRound1Message proto.InternalMessageInfo
+// Deprecated: Use KGRound1Message.ProtoReflect.Descriptor instead.
+func (*KGRound1Message) Descriptor() ([]byte, []int) {
+	return file_protob_ecdsa_keygen_proto_rawDescGZIP(), []int{0}
+}
 
-func (m *KGRound1Message) GetCommitment() []byte {
-	if m != nil {
-		return m.Commitment
+func (x *KGRound1Message) GetCommitment() []byte {
+	if x != nil {
+		return x.Commitment
 	}
 	return nil
 }
 
-func (m *KGRound1Message) GetPaillierN() []byte {
-	if m != nil {
-		return m.PaillierN
+func (x *KGRound1Message) GetPaillierN() []byte {
+	if x != nil {
+		return x.PaillierN
 	}
 	return nil
 }
 
-func (m *KGRound1Message) GetNTilde() []byte {
-	if m != nil {
-		return m.NTilde
+func (x *KGRound1Message) GetNTilde() []byte {
+	if x != nil {
+		return x.NTilde
 	}
 	return nil
 }
 
-func (m *KGRound1Message) GetH1() []byte {
-	if m != nil {
-		return m.H1
+func (x *KGRound1Message) GetH1() []byte {
+	if x != nil {
+		return x.H1
 	}
 	return nil
 }
 
-func (m *KGRound1Message) GetH2() []byte {
-	if m != nil {
-		return m.H2
+func (x *KGRound1Message) GetH2() []byte {
+	if x != nil {
+		return x.H2
 	}
 	return nil
 }
 
-func (m *KGRound1Message) GetDlnproof_1() [][]byte {
-	if m != nil {
-		return m.Dlnproof_1
+func (x *KGRound1Message) GetDlnproof_1() [][]byte {
+	if x != nil {
+		return x.Dlnproof_1
 	}
 	return nil
 }
 
-func (m *KGRound1Message) GetDlnproof_2() [][]byte {
-	if m != nil {
-		return m.Dlnproof_2
+func (x *KGRound1Message) GetDlnproof_2() [][]byte {
+	if x != nil {
+		return x.Dlnproof_2
 	}
 	return nil
 }
 
-//
 // Represents a P2P message sent to each party during Round 2 of the ECDSA TSS keygen protocol.
 type KGRound2Message1 struct {
-	Share                []byte   `protobuf:"bytes,1,opt,name=share,proto3" json:"share,omitempty"`
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
-}
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
 
-func (m *KGRound2Message1) Reset()         { *m = KGRound2Message1{} }
-func (m *KGRound2Message1) String() string { return proto.CompactTextString(m) }
-func (*KGRound2Message1) ProtoMessage()    {}
-func (*KGRound2Message1) Descriptor() ([]byte, []int) {
-	return fileDescriptor_1a2e19e981cdbb01, []int{1}
+	Share    []byte   `protobuf:"bytes,1,opt,name=share,proto3" json:"share,omitempty"`
+	FacProof [][]byte `protobuf:"bytes,2,rep,name=facProof,proto3" json:"facProof,omitempty"`
 }
 
-func (m *KGRound2Message1) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_KGRound2Message1.Unmarshal(m, b)
-}
-func (m *KGRound2Message1) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_KGRound2Message1.Marshal(b, m, deterministic)
+func (x *KGRound2Message1) Reset() {
+	*x = KGRound2Message1{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_protob_ecdsa_keygen_proto_msgTypes[1]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
 }
-func (m *KGRound2Message1) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_KGRound2Message1.Merge(m, src)
+
+func (x *KGRound2Message1) String() string {
+	return protoimpl.X.MessageStringOf(x)
 }
-func (m *KGRound2Message1) XXX_Size() int {
-	return xxx_messageInfo_KGRound2Message1.Size(m)
+
+func (*KGRound2Message1) ProtoMessage() {}
+
+func (x *KGRound2Message1) ProtoReflect() protoreflect.Message {
+	mi := &file_protob_ecdsa_keygen_proto_msgTypes[1]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
 }
-func (m *KGRound2Message1) XXX_DiscardUnknown() {
-	xxx_messageInfo_KGRound2Message1.DiscardUnknown(m)
+
+// Deprecated: Use KGRound2Message1.ProtoReflect.Descriptor instead.
+func (*KGRound2Message1) Descriptor() ([]byte, []int) {
+	return file_protob_ecdsa_keygen_proto_rawDescGZIP(), []int{1}
 }
 
-var xxx_messageInfo_KGRound2Message1 proto.InternalMessageInfo
+func (x *KGRound2Message1) GetShare() []byte {
+	if x != nil {
+		return x.Share
+	}
+	return nil
+}
 
-func (m *KGRound2Message1) GetShare() []byte {
-	if m != nil {
-		return m.Share
+func (x *KGRound2Message1) GetFacProof() [][]byte {
+	if x != nil {
+		return x.FacProof
 	}
 	return nil
 }
 
-//
 // Represents a BROADCAST message sent to each party during Round 2 of the ECDSA TSS keygen protocol.
 type KGRound2Message2 struct {
-	DeCommitment         [][]byte `protobuf:"bytes,1,rep,name=de_commitment,json=deCommitment,proto3" json:"de_commitment,omitempty"`
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
-}
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
 
-func (m *KGRound2Message2) Reset()         { *m = KGRound2Message2{} }
-func (m *KGRound2Message2) String() string { return proto.CompactTextString(m) }
-func (*KGRound2Message2) ProtoMessage()    {}
-func (*KGRound2Message2) Descriptor() ([]byte, []int) {
-	return fileDescriptor_1a2e19e981cdbb01, []int{2}
+	DeCommitment [][]byte `protobuf:"bytes,1,rep,name=de_commitment,json=deCommitment,proto3" json:"de_commitment,omitempty"`
+	ModProof     [][]byte `protobuf:"bytes,2,rep,name=modProof,proto3" json:"modProof,omitempty"`
 }
 
-func (m *KGRound2Message2) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_KGRound2Message2.Unmarshal(m, b)
-}
-func (m *KGRound2Message2) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_KGRound2Message2.Marshal(b, m, deterministic)
+func (x *KGRound2Message2) Reset() {
+	*x = KGRound2Message2{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_protob_ecdsa_keygen_proto_msgTypes[2]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
 }
-func (m *KGRound2Message2) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_KGRound2Message2.Merge(m, src)
+
+func (x *KGRound2Message2) String() string {
+	return protoimpl.X.MessageStringOf(x)
 }
-func (m *KGRound2Message2) XXX_Size() int {
-	return xxx_messageInfo_KGRound2Message2.Size(m)
+
+func (*KGRound2Message2) ProtoMessage() {}
+
+func (x *KGRound2Message2) ProtoReflect() protoreflect.Message {
+	mi := &file_protob_ecdsa_keygen_proto_msgTypes[2]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
 }
-func (m *KGRound2Message2) XXX_DiscardUnknown() {
-	xxx_messageInfo_KGRound2Message2.DiscardUnknown(m)
+
+// Deprecated: Use KGRound2Message2.ProtoReflect.Descriptor instead.
+func (*KGRound2Message2) Descriptor() ([]byte, []int) {
+	return file_protob_ecdsa_keygen_proto_rawDescGZIP(), []int{2}
 }
 
-var xxx_messageInfo_KGRound2Message2 proto.InternalMessageInfo
+func (x *KGRound2Message2) GetDeCommitment() [][]byte {
+	if x != nil {
+		return x.DeCommitment
+	}
+	return nil
+}
 
-func (m *KGRound2Message2) GetDeCommitment() [][]byte {
-	if m != nil {
-		return m.DeCommitment
+func (x *KGRound2Message2) GetModProof() [][]byte {
+	if x != nil {
+		return x.ModProof
 	}
 	return nil
 }
 
-//
 // Represents a BROADCAST message sent to each party during Round 3 of the ECDSA TSS keygen protocol.
 type KGRound3Message struct {
-	PaillierProof        [][]byte `protobuf:"bytes,1,rep,name=paillier_proof,json=paillierProof,proto3" json:"paillier_proof,omitempty"`
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
-}
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
 
-func (m *KGRound3Message) Reset()         { *m = KGRound3Message{} }
-func (m *KGRound3Message) String() string { return proto.CompactTextString(m) }
-func (*KGRound3Message) ProtoMessage()    {}
-func (*KGRound3Message) Descriptor() ([]byte, []int) {
-	return fileDescriptor_1a2e19e981cdbb01, []int{3}
+	PaillierProof [][]byte `protobuf:"bytes,1,rep,name=paillier_proof,json=paillierProof,proto3" json:"paillier_proof,omitempty"`
 }
 
-func (m *KGRound3Message) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_KGRound3Message.Unmarshal(m, b)
-}
-func (m *KGRound3Message) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_KGRound3Message.Marshal(b, m, deterministic)
-}
-func (m *KGRound3Message) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_KGRound3Message.Merge(m, src)
+func (x *KGRound3Message) Reset() {
+	*x = KGRound3Message{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_protob_ecdsa_keygen_proto_msgTypes[3]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
 }
-func (m *KGRound3Message) XXX_Size() int {
-	return xxx_messageInfo_KGRound3Message.Size(m)
+
+func (x *KGRound3Message) String() string {
+	return protoimpl.X.MessageStringOf(x)
 }
-func (m *KGRound3Message) XXX_DiscardUnknown() {
-	xxx_messageInfo_KGRound3Message.DiscardUnknown(m)
+
+func (*KGRound3Message) ProtoMessage() {}
+
+func (x *KGRound3Message) ProtoReflect() protoreflect.Message {
+	mi := &file_protob_ecdsa_keygen_proto_msgTypes[3]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
 }
 
-var xxx_messageInfo_KGRound3Message proto.InternalMessageInfo
+// Deprecated: Use KGRound3Message.ProtoReflect.Descriptor instead.
+func (*KGRound3Message) Descriptor() ([]byte, []int) {
+	return file_protob_ecdsa_keygen_proto_rawDescGZIP(), []int{3}
+}
 
-func (m *KGRound3Message) GetPaillierProof() [][]byte {
-	if m != nil {
-		return m.PaillierProof
+func (x *KGRound3Message) GetPaillierProof() [][]byte {
+	if x != nil {
+		return x.PaillierProof
 	}
 	return nil
 }
 
-func init() {
-	proto.RegisterType((*KGRound1Message)(nil), "KGRound1Message")
-	proto.RegisterType((*KGRound2Message1)(nil), "KGRound2Message1")
-	proto.RegisterType((*KGRound2Message2)(nil), "KGRound2Message2")
-	proto.RegisterType((*KGRound3Message)(nil), "KGRound3Message")
-}
-
-func init() { proto.RegisterFile("protob/ecdsa-keygen.proto", fileDescriptor_1a2e19e981cdbb01) }
-
-var fileDescriptor_1a2e19e981cdbb01 = []byte{
-	// 263 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x64, 0x90, 0x41, 0x4b, 0xc3, 0x40,
-	0x10, 0x85, 0x49, 0x6a, 0x53, 0x1c, 0xd2, 0x28, 0x8b, 0xe0, 0x7a, 0x50, 0x4a, 0x44, 0xe8, 0x45,
-	0xcb, 0x6e, 0x0f, 0x7a, 0xd6, 0x83, 0x07, 0x51, 0xa4, 0x78, 0xf2, 0x12, 0xd2, 0xee, 0xd8, 0x04,
-	0x93, 0xdd, 0x90, 0xc4, 0x83, 0xbf, 0xd0, 0xbf, 0x25, 0x3b, 0xd9, 0x04, 0x83, 0xc7, 0xf7, 0xbd,
-	0x64, 0xd8, 0xf7, 0xc1, 0x59, 0x55, 0x9b, 0xd6, 0x6c, 0x57, 0xb8, 0x53, 0x4d, 0x7a, 0xfd, 0x89,
-	0xdf, 0x7b, 0xd4, 0x37, 0xc4, 0xe2, 0x1f, 0x0f, 0x8e, 0x9e, 0x1e, 0x37, 0xe6, 0x4b, 0x2b, 0xf1,
-	0x8c, 0x4d, 0x93, 0xee, 0x91, 0x5d, 0x00, 0xec, 0x4c, 0x59, 0xe6, 0x6d, 0x89, 0xba, 0xe5, 0xde,
-	0xc2, 0x5b, 0x86, 0x9b, 0x3f, 0x84, 0x9d, 0x03, 0x54, 0x69, 0x5e, 0x14, 0x39, 0xd6, 0x89, 0xe6,
-	0x3e, 0xf5, 0x87, 0x3d, 0x79, 0x61, 0xa7, 0x30, 0xd3, 0x49, 0x9b, 0x17, 0x0a, 0xf9, 0x84, 0xba,
-	0x40, 0xbf, 0xd9, 0xc4, 0x22, 0xf0, 0x33, 0xc1, 0x0f, 0x88, 0xf9, 0x99, 0xa0, 0x2c, 0xf9, 0xd4,
-	0x65, 0x69, 0xef, 0xaa, 0x42, 0x57, 0xb5, 0x31, 0x1f, 0x89, 0xe0, 0xc1, 0x62, 0x62, 0xef, 0xf6,
-	0x44, 0x8c, 0x6a, 0xc9, 0x67, 0xe3, 0x5a, 0xc6, 0x4b, 0x38, 0x76, 0x43, 0xa4, 0x1b, 0x22, 0xd8,
-	0x09, 0x4c, 0x9b, 0x2c, 0xad, 0xd1, 0x8d, 0xe8, 0x42, 0x7c, 0xfb, 0xef, 0x4b, 0xc9, 0x2e, 0x61,
-	0xae, 0x30, 0x19, 0xcd, 0xb6, 0xf7, 0x43, 0x85, 0x0f, 0x03, 0x8b, 0xef, 0x06, 0x57, 0xeb, 0xde,
-	0xd5, 0x15, 0x44, 0x83, 0x0b, 0x7a, 0x88, 0xfb, 0x71, 0xde, 0xd3, 0x57, 0x0b, 0xef, 0xa3, 0xf7,
-	0x90, 0xe4, 0xaf, 0x3a, 0xf9, 0xdb, 0x80, 0xec, 0xaf, 0x7f, 0x03, 0x00, 0x00, 0xff, 0xff, 0xe9,
-	0x13, 0x63, 0x79, 0x9a, 0x01, 0x00, 0x00,
+var File_protob_ecdsa_keygen_proto protoreflect.FileDescriptor
+
+var file_protob_ecdsa_keygen_proto_rawDesc = []byte{
+	0x0a, 0x19, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x62, 0x2f, 0x65, 0x63, 0x64, 0x73, 0x61, 0x2d, 0x6b,
+	0x65, 0x79, 0x67, 0x65, 0x6e, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x12, 0x1b, 0x62, 0x69, 0x6e,
+	0x61, 0x6e, 0x63, 0x65, 0x2e, 0x74, 0x73, 0x73, 0x6c, 0x69, 0x62, 0x2e, 0x65, 0x63, 0x64, 0x73,
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+	0x52, 0x0a, 0x63, 0x6f, 0x6d, 0x6d, 0x69, 0x74, 0x6d, 0x65, 0x6e, 0x74, 0x12, 0x1d, 0x0a, 0x0a,
+	0x70, 0x61, 0x69, 0x6c, 0x6c, 0x69, 0x65, 0x72, 0x5f, 0x6e, 0x18, 0x02, 0x20, 0x01, 0x28, 0x0c,
+	0x52, 0x09, 0x70, 0x61, 0x69, 0x6c, 0x6c, 0x69, 0x65, 0x72, 0x4e, 0x12, 0x17, 0x0a, 0x07, 0x6e,
+	0x5f, 0x74, 0x69, 0x6c, 0x64, 0x65, 0x18, 0x03, 0x20, 0x01, 0x28, 0x0c, 0x52, 0x06, 0x6e, 0x54,
+	0x69, 0x6c, 0x64, 0x65, 0x12, 0x0e, 0x0a, 0x02, 0x68, 0x31, 0x18, 0x04, 0x20, 0x01, 0x28, 0x0c,
+	0x52, 0x02, 0x68, 0x31, 0x12, 0x0e, 0x0a, 0x02, 0x68, 0x32, 0x18, 0x05, 0x20, 0x01, 0x28, 0x0c,
+	0x52, 0x02, 0x68, 0x32, 0x12, 0x1d, 0x0a, 0x0a, 0x64, 0x6c, 0x6e, 0x70, 0x72, 0x6f, 0x6f, 0x66,
+	0x5f, 0x31, 0x18, 0x06, 0x20, 0x03, 0x28, 0x0c, 0x52, 0x09, 0x64, 0x6c, 0x6e, 0x70, 0x72, 0x6f,
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+	0x32, 0x18, 0x07, 0x20, 0x03, 0x28, 0x0c, 0x52, 0x09, 0x64, 0x6c, 0x6e, 0x70, 0x72, 0x6f, 0x6f,
+	0x66, 0x32, 0x22, 0x44, 0x0a, 0x10, 0x4b, 0x47, 0x52, 0x6f, 0x75, 0x6e, 0x64, 0x32, 0x4d, 0x65,
+	0x73, 0x73, 0x61, 0x67, 0x65, 0x31, 0x12, 0x14, 0x0a, 0x05, 0x73, 0x68, 0x61, 0x72, 0x65, 0x18,
+	0x01, 0x20, 0x01, 0x28, 0x0c, 0x52, 0x05, 0x73, 0x68, 0x61, 0x72, 0x65, 0x12, 0x1a, 0x0a, 0x08,
+	0x66, 0x61, 0x63, 0x50, 0x72, 0x6f, 0x6f, 0x66, 0x18, 0x02, 0x20, 0x03, 0x28, 0x0c, 0x52, 0x08,
+	0x66, 0x61, 0x63, 0x50, 0x72, 0x6f, 0x6f, 0x66, 0x22, 0x53, 0x0a, 0x10, 0x4b, 0x47, 0x52, 0x6f,
+	0x75, 0x6e, 0x64, 0x32, 0x4d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x32, 0x12, 0x23, 0x0a, 0x0d,
+	0x64, 0x65, 0x5f, 0x63, 0x6f, 0x6d, 0x6d, 0x69, 0x74, 0x6d, 0x65, 0x6e, 0x74, 0x18, 0x01, 0x20,
+	0x03, 0x28, 0x0c, 0x52, 0x0c, 0x64, 0x65, 0x43, 0x6f, 0x6d, 0x6d, 0x69, 0x74, 0x6d, 0x65, 0x6e,
+	0x74, 0x12, 0x1a, 0x0a, 0x08, 0x6d, 0x6f, 0x64, 0x50, 0x72, 0x6f, 0x6f, 0x66, 0x18, 0x02, 0x20,
+	0x03, 0x28, 0x0c, 0x52, 0x08, 0x6d, 0x6f, 0x64, 0x50, 0x72, 0x6f, 0x6f, 0x66, 0x22, 0x38, 0x0a,
+	0x0f, 0x4b, 0x47, 0x52, 0x6f, 0x75, 0x6e, 0x64, 0x33, 0x4d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65,
+	0x12, 0x25, 0x0a, 0x0e, 0x70, 0x61, 0x69, 0x6c, 0x6c, 0x69, 0x65, 0x72, 0x5f, 0x70, 0x72, 0x6f,
+	0x6f, 0x66, 0x18, 0x01, 0x20, 0x03, 0x28, 0x0c, 0x52, 0x0d, 0x70, 0x61, 0x69, 0x6c, 0x6c, 0x69,
+	0x65, 0x72, 0x50, 0x72, 0x6f, 0x6f, 0x66, 0x42, 0x0e, 0x5a, 0x0c, 0x65, 0x63, 0x64, 0x73, 0x61,
+	0x2f, 0x6b, 0x65, 0x79, 0x67, 0x65, 0x6e, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+}
+
+var (
+	file_protob_ecdsa_keygen_proto_rawDescOnce sync.Once
+	file_protob_ecdsa_keygen_proto_rawDescData = file_protob_ecdsa_keygen_proto_rawDesc
+)
+
+func file_protob_ecdsa_keygen_proto_rawDescGZIP() []byte {
+	file_protob_ecdsa_keygen_proto_rawDescOnce.Do(func() {
+		file_protob_ecdsa_keygen_proto_rawDescData = protoimpl.X.CompressGZIP(file_protob_ecdsa_keygen_proto_rawDescData)
+	})
+	return file_protob_ecdsa_keygen_proto_rawDescData
+}
+
+var file_protob_ecdsa_keygen_proto_msgTypes = make([]protoimpl.MessageInfo, 4)
+var file_protob_ecdsa_keygen_proto_goTypes = []interface{}{
+	(*KGRound1Message)(nil),  // 0: binance.tsslib.ecdsa.keygen.KGRound1Message
+	(*KGRound2Message1)(nil), // 1: binance.tsslib.ecdsa.keygen.KGRound2Message1
+	(*KGRound2Message2)(nil), // 2: binance.tsslib.ecdsa.keygen.KGRound2Message2
+	(*KGRound3Message)(nil),  // 3: binance.tsslib.ecdsa.keygen.KGRound3Message
+}
+var file_protob_ecdsa_keygen_proto_depIdxs = []int32{
+	0, // [0:0] is the sub-list for method output_type
+	0, // [0:0] is the sub-list for method input_type
+	0, // [0:0] is the sub-list for extension type_name
+	0, // [0:0] is the sub-list for extension extendee
+	0, // [0:0] is the sub-list for field type_name
+}
+
+func init() { file_protob_ecdsa_keygen_proto_init() }
+func file_protob_ecdsa_keygen_proto_init() {
+	if File_protob_ecdsa_keygen_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_protob_ecdsa_keygen_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*KGRound1Message); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_protob_ecdsa_keygen_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*KGRound2Message1); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_protob_ecdsa_keygen_proto_msgTypes[2].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*KGRound2Message2); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_protob_ecdsa_keygen_proto_msgTypes[3].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*KGRound3Message); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_protob_ecdsa_keygen_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   4,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_protob_ecdsa_keygen_proto_goTypes,
+		DependencyIndexes: file_protob_ecdsa_keygen_proto_depIdxs,
+		MessageInfos:      file_protob_ecdsa_keygen_proto_msgTypes,
+	}.Build()
+	File_protob_ecdsa_keygen_proto = out.File
+	file_protob_ecdsa_keygen_proto_rawDesc = nil
+	file_protob_ecdsa_keygen_proto_goTypes = nil
+	file_protob_ecdsa_keygen_proto_depIdxs = nil
 }
diff --git a/ecdsa/keygen/local_party.go b/ecdsa/keygen/local_party.go
index 0e1ab190..68e2b772 100644
--- a/ecdsa/keygen/local_party.go
+++ b/ecdsa/keygen/local_party.go
@@ -11,10 +11,10 @@ import (
 	"fmt"
 	"math/big"
 
-	"github.com/binance-chain/tss-lib/common"
-	cmt "github.com/binance-chain/tss-lib/crypto/commitments"
-	"github.com/binance-chain/tss-lib/crypto/vss"
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/common"
+	cmt "github.com/bnb-chain/tss-lib/v2/crypto/commitments"
+	"github.com/bnb-chain/tss-lib/v2/crypto/vss"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 // Implements Party
@@ -32,7 +32,7 @@ type (
 
 		// outbound messaging
 		out chan<- tss.Message
-		end chan<- LocalPartySaveData
+		end chan<- *LocalPartySaveData
 	}
 
 	localMessageStore struct {
@@ -49,6 +49,8 @@ type (
 		ui            *big.Int // used for tests
 		KGCs          []cmt.HashCommitment
 		vs            vss.Vs
+		ssid          []byte
+		ssidNonce     *big.Int
 		shares        vss.Shares
 		deCommitPolyG cmt.HashDeCommitment
 	}
@@ -58,7 +60,7 @@ type (
 func NewLocalParty(
 	params *tss.Parameters,
 	out chan<- tss.Message,
-	end chan<- LocalPartySaveData,
+	end chan<- *LocalPartySaveData,
 	optionalPreParams ...LocalPreParams,
 ) tss.Party {
 	partyCount := params.PartyCount()
diff --git a/ecdsa/keygen/local_party_test.go b/ecdsa/keygen/local_party_test.go
index 517ae451..ac9d4e2a 100644
--- a/ecdsa/keygen/local_party_test.go
+++ b/ecdsa/keygen/local_party_test.go
@@ -20,13 +20,13 @@ import (
 	"github.com/ipfs/go-log"
 	"github.com/stretchr/testify/assert"
 
-	"github.com/binance-chain/tss-lib/common"
-	"github.com/binance-chain/tss-lib/crypto"
-	"github.com/binance-chain/tss-lib/crypto/dlnproof"
-	"github.com/binance-chain/tss-lib/crypto/paillier"
-	"github.com/binance-chain/tss-lib/crypto/vss"
-	"github.com/binance-chain/tss-lib/test"
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/common"
+	"github.com/bnb-chain/tss-lib/v2/crypto"
+	"github.com/bnb-chain/tss-lib/v2/crypto/dlnproof"
+	"github.com/bnb-chain/tss-lib/v2/crypto/paillier"
+	"github.com/bnb-chain/tss-lib/v2/crypto/vss"
+	"github.com/bnb-chain/tss-lib/v2/test"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 const (
@@ -46,7 +46,7 @@ func TestStartRound1Paillier(t *testing.T) {
 	pIDs := tss.GenerateTestPartyIDs(1)
 	p2pCtx := tss.NewPeerContext(pIDs)
 	threshold := 1
-	params := tss.NewParameters(p2pCtx, pIDs[0], len(pIDs), threshold)
+	params := tss.NewParameters(tss.EC(), p2pCtx, pIDs[0], len(pIDs), threshold)
 
 	fixtures, pIDs, err := LoadKeygenTestFixtures(testParticipants)
 	if err != nil {
@@ -86,7 +86,7 @@ func TestFinishAndSaveH1H2(t *testing.T) {
 	pIDs := tss.GenerateTestPartyIDs(1)
 	p2pCtx := tss.NewPeerContext(pIDs)
 	threshold := 1
-	params := tss.NewParameters(p2pCtx, pIDs[0], len(pIDs), threshold)
+	params := tss.NewParameters(tss.EC(), p2pCtx, pIDs[0], len(pIDs), threshold)
 
 	fixtures, pIDs, err := LoadKeygenTestFixtures(testParticipants)
 	if err != nil {
@@ -133,7 +133,7 @@ func TestBadMessageCulprits(t *testing.T) {
 
 	pIDs := tss.GenerateTestPartyIDs(2)
 	p2pCtx := tss.NewPeerContext(pIDs)
-	params := tss.NewParameters(p2pCtx, pIDs[0], len(pIDs), 1)
+	params := tss.NewParameters(tss.S256(), p2pCtx, pIDs[0], len(pIDs), 1)
 
 	fixtures, pIDs, err := LoadKeygenTestFixtures(testParticipants)
 	if err != nil {
@@ -162,7 +162,7 @@ func TestBadMessageCulprits(t *testing.T) {
 	assert.Equal(t, 1, len(err2.Culprits()))
 	assert.Equal(t, pIDs[1], err2.Culprits()[0])
 	assert.Equal(t,
-		"task ecdsa-keygen, party {0,P[1]}, round 1, culprits [{1,2}]: message failed ValidateBasic: Type: binance.tss-lib.ecdsa.keygen.KGRound1Message, From: {1,2}, To: all",
+		"task ecdsa-keygen, party {0,P[1]}, round 1, culprits [{1,2}]: message failed ValidateBasic: Type: binance.tsslib.ecdsa.keygen.KGRound1Message, From: {1,2}, To: all",
 		err2.Error())
 }
 
@@ -183,7 +183,7 @@ func TestE2EConcurrentAndSaveFixtures(t *testing.T) {
 
 	errCh := make(chan *tss.Error, len(pIDs))
 	outCh := make(chan tss.Message, len(pIDs))
-	endCh := make(chan LocalPartySaveData, len(pIDs))
+	endCh := make(chan *LocalPartySaveData, len(pIDs))
 
 	updater := test.SharedPartyUpdater
 
@@ -192,7 +192,11 @@ func TestE2EConcurrentAndSaveFixtures(t *testing.T) {
 	// init the parties
 	for i := 0; i < len(pIDs); i++ {
 		var P *LocalParty
-		params := tss.NewParameters(p2pCtx, pIDs[i], len(pIDs), threshold)
+		params := tss.NewParameters(tss.S256(), p2pCtx, pIDs[i], len(pIDs), threshold)
+		// do not use in untrusted setting
+		params.SetNoProofMod()
+		// do not use in untrusted setting
+		params.SetNoProofFac()
 		if i < len(fixtures) {
 			P = NewLocalParty(params, outCh, endCh, fixtures[i].LocalPreParams).(*LocalParty)
 		} else {
@@ -239,7 +243,7 @@ keygen:
 			// .. here comes a workaround to recover this party's index (it was removed from save data)
 			index, err := save.OriginalIndex()
 			assert.NoErrorf(t, err, "should not be an error getting a party's index from save data")
-			tryWriteTestFixtureFile(t, index, save)
+			tryWriteTestFixtureFile(t, index, *save)
 
 			atomic.AddInt32(&ended, 1)
 			if atomic.LoadInt32(&ended) == int32(len(pIDs)) {
@@ -249,10 +253,7 @@ keygen:
 				u := new(big.Int)
 				for j, Pj := range parties {
 					pShares := make(vss.Shares, 0)
-					for j2, P := range parties {
-						if j2 == j {
-							continue
-						}
+					for _, P := range parties {
 						vssMsgs := P.temp.kgRound2Message1s
 						share := vssMsgs[j].Content().(*KGRound2Message1).Share
 						shareStruct := &vss.Share{
@@ -262,7 +263,7 @@ keygen:
 						}
 						pShares = append(pShares, shareStruct)
 					}
-					uj, err := pShares[:threshold+1].ReConstruct()
+					uj, err := pShares[:threshold+1].ReConstruct(tss.S256())
 					assert.NoError(t, err, "vss.ReConstruct should not throw error")
 
 					// uG test: u*G[j] == V[0]
@@ -280,7 +281,7 @@ keygen:
 					{
 						badShares := pShares[:threshold]
 						badShares[len(badShares)-1].Share.Set(big.NewInt(0))
-						uj, err := pShares[:threshold].ReConstruct()
+						uj, err := pShares[:threshold].ReConstruct(tss.S256())
 						assert.NoError(t, err)
 						assert.NotEqual(t, parties[j].temp.ui, uj)
 						BigXjX, BigXjY := tss.EC().ScalarBaseMult(uj.Bytes())
diff --git a/ecdsa/keygen/messages.go b/ecdsa/keygen/messages.go
index 17296ca1..b4d6062c 100644
--- a/ecdsa/keygen/messages.go
+++ b/ecdsa/keygen/messages.go
@@ -7,16 +7,16 @@
 package keygen
 
 import (
+	"github.com/bnb-chain/tss-lib/v2/crypto/facproof"
+	"github.com/bnb-chain/tss-lib/v2/crypto/modproof"
 	"math/big"
 
-	"github.com/golang/protobuf/proto"
-
-	"github.com/binance-chain/tss-lib/common"
-	cmt "github.com/binance-chain/tss-lib/crypto/commitments"
-	"github.com/binance-chain/tss-lib/crypto/dlnproof"
-	"github.com/binance-chain/tss-lib/crypto/paillier"
-	"github.com/binance-chain/tss-lib/crypto/vss"
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/common"
+	cmt "github.com/bnb-chain/tss-lib/v2/crypto/commitments"
+	"github.com/bnb-chain/tss-lib/v2/crypto/dlnproof"
+	"github.com/bnb-chain/tss-lib/v2/crypto/paillier"
+	"github.com/bnb-chain/tss-lib/v2/crypto/vss"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 // These messages were generated from Protocol Buffers definitions into ecdsa-keygen.pb.go
@@ -32,13 +32,6 @@ var (
 	}
 )
 
-func init() {
-	proto.RegisterType((*KGRound1Message)(nil), tss.ECDSAProtoNamePrefix+"keygen.KGRound1Message")
-	proto.RegisterType((*KGRound2Message1)(nil), tss.ECDSAProtoNamePrefix+"keygen.KGRound2Message1")
-	proto.RegisterType((*KGRound2Message2)(nil), tss.ECDSAProtoNamePrefix+"keygen.KGRound2Message2")
-	proto.RegisterType((*KGRound3Message)(nil), tss.ECDSAProtoNamePrefix+"keygen.KGRound3Message")
-}
-
 // ----- //
 
 func NewKGRound1Message(
@@ -118,14 +111,17 @@ func (m *KGRound1Message) UnmarshalDLNProof2() (*dlnproof.Proof, error) {
 func NewKGRound2Message1(
 	to, from *tss.PartyID,
 	share *vss.Share,
+	proof *facproof.ProofFac,
 ) tss.ParsedMessage {
 	meta := tss.MessageRouting{
 		From:        from,
 		To:          []*tss.PartyID{to},
 		IsBroadcast: false,
 	}
+	proofBzs := proof.Bytes()
 	content := &KGRound2Message1{
-		Share: share.Share.Bytes(),
+		Share:    share.Share.Bytes(),
+		FacProof: proofBzs[:],
 	}
 	msg := tss.NewMessageWrapper(meta, content)
 	return tss.NewMessage(meta, content, msg)
@@ -134,25 +130,34 @@ func NewKGRound2Message1(
 func (m *KGRound2Message1) ValidateBasic() bool {
 	return m != nil &&
 		common.NonEmptyBytes(m.GetShare())
+	// This is commented for backward compatibility, which msg has no proof
+	// && common.NonEmptyMultiBytes(m.GetFacProof(), facproof.ProofFacBytesParts)
 }
 
 func (m *KGRound2Message1) UnmarshalShare() *big.Int {
 	return new(big.Int).SetBytes(m.Share)
 }
 
+func (m *KGRound2Message1) UnmarshalFacProof() (*facproof.ProofFac, error) {
+	return facproof.NewProofFromBytes(m.GetFacProof())
+}
+
 // ----- //
 
 func NewKGRound2Message2(
 	from *tss.PartyID,
 	deCommitment cmt.HashDeCommitment,
+	proof *modproof.ProofMod,
 ) tss.ParsedMessage {
 	meta := tss.MessageRouting{
 		From:        from,
 		IsBroadcast: true,
 	}
 	dcBzs := common.BigIntsToBytes(deCommitment)
+	proofBzs := proof.Bytes()
 	content := &KGRound2Message2{
 		DeCommitment: dcBzs,
+		ModProof:     proofBzs[:],
 	}
 	msg := tss.NewMessageWrapper(meta, content)
 	return tss.NewMessage(meta, content, msg)
@@ -161,6 +166,8 @@ func NewKGRound2Message2(
 func (m *KGRound2Message2) ValidateBasic() bool {
 	return m != nil &&
 		common.NonEmptyMultiBytes(m.GetDeCommitment())
+	// This is commented for backward compatibility, which msg has no proof
+	// && common.NonEmptyMultiBytes(m.GetModProof(), modproof.ProofModBytesParts)
 }
 
 func (m *KGRound2Message2) UnmarshalDeCommitment() []*big.Int {
@@ -168,6 +175,10 @@ func (m *KGRound2Message2) UnmarshalDeCommitment() []*big.Int {
 	return cmt.NewHashDeCommitmentFromBytes(deComBzs)
 }
 
+func (m *KGRound2Message2) UnmarshalModProof() (*modproof.ProofMod, error) {
+	return modproof.NewProofFromBytes(m.GetModProof())
+}
+
 // ----- //
 
 func NewKGRound3Message(
diff --git a/ecdsa/keygen/prepare.go b/ecdsa/keygen/prepare.go
index 8b162d7b..cfbc127f 100644
--- a/ecdsa/keygen/prepare.go
+++ b/ecdsa/keygen/prepare.go
@@ -7,13 +7,14 @@
 package keygen
 
 import (
+	"context"
 	"errors"
 	"math/big"
 	"runtime"
 	"time"
 
-	"github.com/binance-chain/tss-lib/common"
-	"github.com/binance-chain/tss-lib/crypto/paillier"
+	"github.com/bnb-chain/tss-lib/v2/common"
+	"github.com/bnb-chain/tss-lib/v2/crypto/paillier"
 )
 
 const (
@@ -23,12 +24,25 @@ const (
 	safePrimeBitLen = 1024
 	// Ticker for printing log statements while generating primes/modulus
 	logProgressTickInterval = 8 * time.Second
+	// Safe big len using random for ssid
+	SafeBitLen = 1024
 )
 
 // GeneratePreParams finds two safe primes and computes the Paillier secret required for the protocol.
 // This can be a time consuming process so it is recommended to do it out-of-band.
 // If not specified, a concurrency value equal to the number of available CPU cores will be used.
+// If pre-parameters could not be generated before the timeout, an error is returned.
 func GeneratePreParams(timeout time.Duration, optionalConcurrency ...int) (*LocalPreParams, error) {
+	ctx, cancel := context.WithTimeout(context.Background(), timeout)
+	defer cancel()
+	return GeneratePreParamsWithContext(ctx, optionalConcurrency...)
+}
+
+// GeneratePreParams finds two safe primes and computes the Paillier secret required for the protocol.
+// This can be a time consuming process so it is recommended to do it out-of-band.
+// If not specified, a concurrency value equal to the number of available CPU cores will be used.
+// If pre-parameters could not be generated before the context is done, an error is returned.
+func GeneratePreParamsWithContext(ctx context.Context, optionalConcurrency ...int) (*LocalPreParams, error) {
 	var concurrency int
 	if 0 < len(optionalConcurrency) {
 		if 1 < len(optionalConcurrency) {
@@ -51,7 +65,7 @@ func GeneratePreParams(timeout time.Duration, optionalConcurrency ...int) (*Loca
 		common.Logger.Info("generating the Paillier modulus, please wait...")
 		start := time.Now()
 		// more concurrency weight is assigned here because the paillier primes have a requirement of having "large" P-Q
-		PiPaillierSk, _, err := paillier.GenerateKeyPair(paillierModulusLen, timeout, concurrency*2)
+		PiPaillierSk, _, err := paillier.GenerateKeyPair(ctx, paillierModulusLen, concurrency*2)
 		if err != nil {
 			ch <- nil
 			return
@@ -65,7 +79,7 @@ func GeneratePreParams(timeout time.Duration, optionalConcurrency ...int) (*Loca
 		var err error
 		common.Logger.Info("generating the safe primes for the signing proofs, please wait...")
 		start := time.Now()
-		sgps, err := common.GetRandomSafePrimesConcurrent(safePrimeBitLen, 2, timeout, concurrency)
+		sgps, err := common.GetRandomSafePrimesConcurrent(ctx, safePrimeBitLen, 2, concurrency)
 		if err != nil {
 			ch <- nil
 			return
diff --git a/ecdsa/keygen/prepare_test.go b/ecdsa/keygen/prepare_test.go
new file mode 100644
index 00000000..f00e8e85
--- /dev/null
+++ b/ecdsa/keygen/prepare_test.go
@@ -0,0 +1,53 @@
+// Copyright © 2019 Binance
+//
+// This file is part of Binance. The full Binance copyright notice, including
+// terms governing use, modification, and redistribution, is contained in the
+// file LICENSE at the root of the source code distribution tree.
+
+package keygen
+
+import (
+	"context"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestGeneratePreParamsTimeout(t *testing.T) {
+	start := time.Now()
+	preParams, err := GeneratePreParams(5*time.Millisecond, 1)
+
+	assert.Nil(t, preParams)
+	assert.NotNil(t, err)
+	assert.WithinDuration(t, start, time.Now(), 1*time.Second)
+}
+
+func TestGeneratePreParamsWithContextTimeout(t *testing.T) {
+	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Millisecond)
+	defer cancel()
+
+	start := time.Now()
+	preParams, err := GeneratePreParamsWithContext(ctx, 1)
+
+	assert.Nil(t, preParams)
+	assert.NotNil(t, err)
+	assert.WithinDuration(t, start, time.Now(), 1*time.Second)
+}
+
+func TestGenerateWithContext(t *testing.T) {
+	ctx, cancel := context.WithTimeout(context.Background(), 20*time.Minute)
+	defer cancel()
+
+	preParams, err := GeneratePreParamsWithContext(ctx, 1)
+	assert.NotNil(t, preParams)
+	assert.Nil(t, err)
+	assert.NotNil(t, preParams.PaillierSK)
+	assert.NotNil(t, preParams.NTildei)
+	assert.NotNil(t, preParams.H1i)
+	assert.NotNil(t, preParams.H2i)
+	assert.NotNil(t, preParams.Alpha)
+	assert.NotNil(t, preParams.Beta)
+	assert.NotNil(t, preParams.P)
+	assert.NotNil(t, preParams.Q)
+}
diff --git a/ecdsa/keygen/round_1.go b/ecdsa/keygen/round_1.go
index 16d596f1..5e66f681 100644
--- a/ecdsa/keygen/round_1.go
+++ b/ecdsa/keygen/round_1.go
@@ -10,12 +10,12 @@ import (
 	"errors"
 	"math/big"
 
-	"github.com/binance-chain/tss-lib/common"
-	"github.com/binance-chain/tss-lib/crypto"
-	cmts "github.com/binance-chain/tss-lib/crypto/commitments"
-	"github.com/binance-chain/tss-lib/crypto/dlnproof"
-	"github.com/binance-chain/tss-lib/crypto/vss"
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/common"
+	"github.com/bnb-chain/tss-lib/v2/crypto"
+	cmts "github.com/bnb-chain/tss-lib/v2/crypto/commitments"
+	"github.com/bnb-chain/tss-lib/v2/crypto/dlnproof"
+	"github.com/bnb-chain/tss-lib/v2/crypto/vss"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 var (
@@ -23,7 +23,7 @@ var (
 )
 
 // round 1 represents round 1 of the keygen part of the GG18 ECDSA TSS spec (Gennaro, Goldfeder; 2018)
-func newRound1(params *tss.Parameters, save *LocalPartySaveData, temp *localTempData, out chan<- tss.Message, end chan<- LocalPartySaveData) tss.Round {
+func newRound1(params *tss.Parameters, save *LocalPartySaveData, temp *localTempData, out chan<- tss.Message, end chan<- *LocalPartySaveData) tss.Round {
 	return &round1{
 		&base{params, save, temp, out, end, make([]bool, len(params.Parties().IDs())), false, 1}}
 }
@@ -40,13 +40,13 @@ func (round *round1) Start() *tss.Error {
 	i := Pi.Index
 
 	// 1. calculate "partial" key share ui
-	ui := common.GetRandomPositiveInt(tss.EC().Params().N)
+	ui := common.GetRandomPositiveInt(round.Params().EC().Params().N)
 
 	round.temp.ui = ui
 
 	// 2. compute the vss shares
 	ids := round.Parties().IDs().Keys()
-	vs, shares, err := vss.Create(round.Threshold(), ui, ids)
+	vs, shares, err := vss.Create(round.Params().EC(), round.Threshold(), ui, ids)
 	if err != nil {
 		return round.WrapError(err, Pi)
 	}
@@ -74,7 +74,7 @@ func (round *round1) Start() *tss.Error {
 	} else if round.save.LocalPreParams.ValidateWithProof() {
 		preParams = &round.save.LocalPreParams
 	} else {
-		preParams, err = GeneratePreParams(round.SafePrimeGenTimeout(), 3)
+		preParams, err = GeneratePreParams(round.SafePrimeGenTimeout(), round.Concurrency())
 		if err != nil {
 			return round.WrapError(errors.New("pre-params generation failed"), Pi)
 		}
@@ -100,8 +100,14 @@ func (round *round1) Start() *tss.Error {
 	// and keep in temporary storage:
 	// - VSS Vs
 	// - our set of Shamir shares
+	round.temp.ssidNonce = new(big.Int).SetUint64(0)
 	round.save.ShareID = ids[i]
 	round.temp.vs = vs
+	ssid, err := round.getSSID()
+	if err != nil {
+		return round.WrapError(errors.New("failed to generate ssid"))
+	}
+	round.temp.ssid = ssid
 	round.temp.shares = shares
 
 	// for this P: SAVE de-commitments, paillier keys for round 2
@@ -130,17 +136,19 @@ func (round *round1) CanAccept(msg tss.ParsedMessage) bool {
 }
 
 func (round *round1) Update() (bool, *tss.Error) {
+	ret := true
 	for j, msg := range round.temp.kgRound1Messages {
 		if round.ok[j] {
 			continue
 		}
 		if msg == nil || !round.CanAccept(msg) {
-			return false, nil
+			ret = false
+			continue
 		}
 		// vss check is in round 2
 		round.ok[j] = true
 	}
-	return true, nil
+	return ret, nil
 }
 
 func (round *round1) NextRound() tss.Round {
diff --git a/ecdsa/keygen/round_2.go b/ecdsa/keygen/round_2.go
index 7346b648..52e6d4eb 100644
--- a/ecdsa/keygen/round_2.go
+++ b/ecdsa/keygen/round_2.go
@@ -12,7 +12,15 @@ import (
 	"math/big"
 	"sync"
 
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/crypto/facproof"
+	"github.com/bnb-chain/tss-lib/v2/crypto/modproof"
+
+	"github.com/bnb-chain/tss-lib/v2/common"
+	"github.com/bnb-chain/tss-lib/v2/tss"
+)
+
+const (
+	paillierBitsLen = 2048
 )
 
 func (round *round2) Start() *tss.Error {
@@ -23,6 +31,13 @@ func (round *round2) Start() *tss.Error {
 	round.started = true
 	round.resetOK()
 
+	common.Logger.Debugf(
+		"%s Setting up DLN verification with concurrency level of %d",
+		round.PartyID(),
+		round.Concurrency(),
+	)
+	dlnVerifier := NewDlnProofVerifier(round.Concurrency())
+
 	i := round.PartyID().Index
 
 	// 6. verify dln proofs, store r1 message pieces, ensure uniqueness of h1j, h2j
@@ -32,13 +47,20 @@ func (round *round2) Start() *tss.Error {
 	wg := new(sync.WaitGroup)
 	for j, msg := range round.temp.kgRound1Messages {
 		r1msg := msg.Content().(*KGRound1Message)
-		H1j, H2j, NTildej :=
+		H1j, H2j, NTildej, paillierPKj :=
 			r1msg.UnmarshalH1(),
 			r1msg.UnmarshalH2(),
-			r1msg.UnmarshalNTilde()
+			r1msg.UnmarshalNTilde(),
+			r1msg.UnmarshalPaillierPK()
+		if paillierPKj.N.BitLen() != paillierBitsLen {
+			return round.WrapError(errors.New("got paillier modulus with insufficient bits for this party"), msg.GetFrom())
+		}
 		if H1j.Cmp(H2j) == 0 {
 			return round.WrapError(errors.New("h1j and h2j were equal for this party"), msg.GetFrom())
 		}
+		if NTildej.BitLen() != paillierBitsLen {
+			return round.WrapError(errors.New("got NTildej with insufficient bits for this party"), msg.GetFrom())
+		}
 		h1JHex, h2JHex := hex.EncodeToString(H1j.Bytes()), hex.EncodeToString(H2j.Bytes())
 		if _, found := h1H2Map[h1JHex]; found {
 			return round.WrapError(errors.New("this h1j was already used by another party"), msg.GetFrom())
@@ -47,19 +69,23 @@ func (round *round2) Start() *tss.Error {
 			return round.WrapError(errors.New("this h2j was already used by another party"), msg.GetFrom())
 		}
 		h1H2Map[h1JHex], h1H2Map[h2JHex] = struct{}{}, struct{}{}
+
 		wg.Add(2)
-		go func(j int, msg tss.ParsedMessage, r1msg *KGRound1Message, H1j, H2j, NTildej *big.Int) {
-			if dlnProof1, err := r1msg.UnmarshalDLNProof1(); err != nil || !dlnProof1.Verify(H1j, H2j, NTildej) {
-				dlnProof1FailCulprits[j] = msg.GetFrom()
+		_j := j
+		_msg := msg
+
+		dlnVerifier.VerifyDLNProof1(r1msg, H1j, H2j, NTildej, func(isValid bool) {
+			if !isValid {
+				dlnProof1FailCulprits[_j] = _msg.GetFrom()
 			}
 			wg.Done()
-		}(j, msg, r1msg, H1j, H2j, NTildej)
-		go func(j int, msg tss.ParsedMessage, r1msg *KGRound1Message, H1j, H2j, NTildej *big.Int) {
-			if dlnProof2, err := r1msg.UnmarshalDLNProof2(); err != nil || !dlnProof2.Verify(H2j, H1j, NTildej) {
-				dlnProof2FailCulprits[j] = msg.GetFrom()
+		})
+		dlnVerifier.VerifyDLNProof2(r1msg, H2j, H1j, NTildej, func(isValid bool) {
+			if !isValid {
+				dlnProof2FailCulprits[_j] = _msg.GetFrom()
 			}
 			wg.Done()
-		}(j, msg, r1msg, H1j, H2j, NTildej)
+		})
 	}
 	wg.Wait()
 	for _, culprit := range append(dlnProof1FailCulprits, dlnProof2FailCulprits...) {
@@ -87,19 +113,40 @@ func (round *round2) Start() *tss.Error {
 
 	// 5. p2p send share ij to Pj
 	shares := round.temp.shares
+	ContextI := append(round.temp.ssid, big.NewInt(int64(i)).Bytes()...)
 	for j, Pj := range round.Parties().IDs() {
-		r2msg1 := NewKGRound2Message1(Pj, round.PartyID(), shares[j])
+
+		facProof := &facproof.ProofFac{P: zero, Q: zero, A: zero, B: zero, T: zero, Sigma: zero,
+			Z1: zero, Z2: zero, W1: zero, W2: zero, V: zero}
+		if !round.Params().NoProofFac() {
+			var err error
+			facProof, err = facproof.NewProof(ContextI, round.EC(), round.save.PaillierSK.N, round.save.NTildej[j],
+				round.save.H1j[j], round.save.H2j[j], round.save.PaillierSK.P, round.save.PaillierSK.Q)
+			if err != nil {
+				return round.WrapError(err, round.PartyID())
+			}
+
+		}
+		r2msg1 := NewKGRound2Message1(Pj, round.PartyID(), shares[j], facProof)
 		// do not send to this Pj, but store for round 3
 		if j == i {
 			round.temp.kgRound2Message1s[j] = r2msg1
 			continue
 		}
-		round.temp.kgRound2Message1s[i] = r2msg1
 		round.out <- r2msg1
 	}
 
 	// 7. BROADCAST de-commitments of Shamir poly*G
-	r2msg2 := NewKGRound2Message2(round.PartyID(), round.temp.deCommitPolyG)
+	modProof := &modproof.ProofMod{W: zero, X: *new([80]*big.Int), A: zero, B: zero, Z: *new([80]*big.Int)}
+	if !round.Parameters.NoProofMod() {
+		var err error
+		modProof, err = modproof.NewProof(ContextI, round.save.PaillierSK.N,
+			round.save.PaillierSK.P, round.save.PaillierSK.Q)
+		if err != nil {
+			return round.WrapError(err, round.PartyID())
+		}
+	}
+	r2msg2 := NewKGRound2Message2(round.PartyID(), round.temp.deCommitPolyG, modProof)
 	round.temp.kgRound2Message2s[i] = r2msg2
 	round.out <- r2msg2
 
@@ -118,20 +165,23 @@ func (round *round2) CanAccept(msg tss.ParsedMessage) bool {
 
 func (round *round2) Update() (bool, *tss.Error) {
 	// guard - VERIFY de-commit for all Pj
+	ret := true
 	for j, msg := range round.temp.kgRound2Message1s {
 		if round.ok[j] {
 			continue
 		}
 		if msg == nil || !round.CanAccept(msg) {
-			return false, nil
+			ret = false
+			continue
 		}
 		msg2 := round.temp.kgRound2Message2s[j]
 		if msg2 == nil || !round.CanAccept(msg2) {
-			return false, nil
+			ret = false
+			continue
 		}
 		round.ok[j] = true
 	}
-	return true, nil
+	return ret, nil
 }
 
 func (round *round2) NextRound() tss.Round {
diff --git a/ecdsa/keygen/round_3.go b/ecdsa/keygen/round_3.go
index c7b89ac7..f6b14155 100644
--- a/ecdsa/keygen/round_3.go
+++ b/ecdsa/keygen/round_3.go
@@ -13,11 +13,11 @@ import (
 	"github.com/hashicorp/go-multierror"
 	errors2 "github.com/pkg/errors"
 
-	"github.com/binance-chain/tss-lib/common"
-	"github.com/binance-chain/tss-lib/crypto"
-	"github.com/binance-chain/tss-lib/crypto/commitments"
-	"github.com/binance-chain/tss-lib/crypto/vss"
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/common"
+	"github.com/bnb-chain/tss-lib/v2/crypto"
+	"github.com/bnb-chain/tss-lib/v2/crypto/commitments"
+	"github.com/bnb-chain/tss-lib/v2/crypto/vss"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 func (round *round3) Start() *tss.Error {
@@ -41,7 +41,7 @@ func (round *round3) Start() *tss.Error {
 		share := r2msg1.UnmarshalShare()
 		xi = new(big.Int).Add(xi, share)
 	}
-	round.save.Xi = new(big.Int).Mod(xi, tss.EC().Params().N)
+	round.save.Xi = new(big.Int).Mod(xi, round.Params().EC().Params().N)
 
 	// 2-3.
 	Vc := make(vss.Vs, round.Threshold()+1)
@@ -65,6 +65,7 @@ func (round *round3) Start() *tss.Error {
 		if j == PIdx {
 			continue
 		}
+		ContextJ := common.AppendBigIntToBytesSlice(round.temp.ssid, big.NewInt(int64(j)))
 		// 6-8.
 		go func(j int, ch chan<- vssOut) {
 			// 4-9.
@@ -77,21 +78,53 @@ func (round *round3) Start() *tss.Error {
 				ch <- vssOut{errors.New("de-commitment verify failed"), nil}
 				return
 			}
-			PjVs, err := crypto.UnFlattenECPoints(tss.EC(), flatPolyGs)
+			PjVs, err := crypto.UnFlattenECPoints(round.Params().EC(), flatPolyGs)
 			if err != nil {
 				ch <- vssOut{err, nil}
 				return
 			}
+			modProof, err := r2msg2.UnmarshalModProof()
+			if err != nil && round.Parameters.NoProofMod() {
+				// For old parties, the modProof could be not exist
+				// Not return error for compatibility reason
+				common.Logger.Warningf("modProof not exist:%s", Ps[j])
+			} else {
+				if err != nil {
+					ch <- vssOut{errors.New("modProof verify failed"), nil}
+					return
+				}
+				if ok = modProof.Verify(ContextJ, round.save.PaillierPKs[j].N); !ok {
+					ch <- vssOut{errors.New("modProof verify failed"), nil}
+					return
+				}
+			}
 			r2msg1 := round.temp.kgRound2Message1s[j].Content().(*KGRound2Message1)
 			PjShare := vss.Share{
 				Threshold: round.Threshold(),
 				ID:        round.PartyID().KeyInt(),
 				Share:     r2msg1.UnmarshalShare(),
 			}
-			if ok = PjShare.Verify(round.Threshold(), PjVs); !ok {
+			if ok = PjShare.Verify(round.Params().EC(), round.Threshold(), PjVs); !ok {
 				ch <- vssOut{errors.New("vss verify failed"), nil}
 				return
 			}
+			facProof, err := r2msg1.UnmarshalFacProof()
+			if err != nil && round.NoProofFac() {
+				// For old parties, the facProof could be not exist
+				// Not return error for compatibility reason
+				common.Logger.Warningf("facProof not exist:%s", Ps[j])
+			} else {
+				if err != nil {
+					ch <- vssOut{errors.New("facProof verify failed"), nil}
+					return
+				}
+				if ok = facProof.Verify(ContextJ, round.EC(), round.save.PaillierPKs[j].N, round.save.NTildei,
+					round.save.H1i, round.save.H2i); !ok {
+					ch <- vssOut{errors.New("facProof verify failed"), nil}
+					return
+				}
+			}
+
 			// (9) handled above
 			ch <- vssOut{nil, PjVs}
 		}(j, chs[j])
@@ -114,10 +147,9 @@ func (round *round3) Start() *tss.Error {
 		var multiErr error
 		if len(culprits) > 0 {
 			for _, vssResult := range vssResults {
-				if vssResult.unWrappedErr == nil {
-					continue
+				if vssResult.unWrappedErr != nil {
+					multiErr = multierror.Append(multiErr, vssResult.unWrappedErr)
 				}
-				multiErr = multierror.Append(multiErr, vssResult.unWrappedErr)
 			}
 			return round.WrapError(multiErr, culprits...)
 		}
@@ -146,7 +178,7 @@ func (round *round3) Start() *tss.Error {
 	// 12-16. compute Xj for each Pj
 	{
 		var err error
-		modQ := common.ModInt(tss.EC().Params().N)
+		modQ := common.ModInt(round.Params().EC().Params().N)
 		culprits := make([]*tss.PartyID, 0, len(Ps)) // who caused the error(s)
 		bigXj := round.save.BigXj
 		for j := 0; j < round.PartyCount(); j++ {
@@ -170,7 +202,7 @@ func (round *round3) Start() *tss.Error {
 	}
 
 	// 17. compute and SAVE the ECDSA public key `y`
-	ecdsaPubKey, err := crypto.NewECPoint(tss.EC(), Vc[0].X(), Vc[0].Y())
+	ecdsaPubKey, err := crypto.NewECPoint(round.Params().EC(), Vc[0].X(), Vc[0].Y())
 	if err != nil {
 		return round.WrapError(errors2.Wrapf(err, "public key is not on the curve"))
 	}
@@ -196,17 +228,19 @@ func (round *round3) CanAccept(msg tss.ParsedMessage) bool {
 }
 
 func (round *round3) Update() (bool, *tss.Error) {
+	ret := true
 	for j, msg := range round.temp.kgRound3Messages {
 		if round.ok[j] {
 			continue
 		}
 		if msg == nil || !round.CanAccept(msg) {
-			return false, nil
+			ret = false
+			continue
 		}
 		// proof check is in round 4
 		round.ok[j] = true
 	}
-	return true, nil
+	return ret, nil
 }
 
 func (round *round3) NextRound() tss.Round {
diff --git a/ecdsa/keygen/round_4.go b/ecdsa/keygen/round_4.go
index 2a544836..17bfd949 100644
--- a/ecdsa/keygen/round_4.go
+++ b/ecdsa/keygen/round_4.go
@@ -9,9 +9,9 @@ package keygen
 import (
 	"errors"
 
-	"github.com/binance-chain/tss-lib/common"
-	"github.com/binance-chain/tss-lib/crypto/paillier"
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/common"
+	"github.com/bnb-chain/tss-lib/v2/crypto/paillier"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 func (round *round4) Start() *tss.Error {
@@ -73,7 +73,7 @@ func (round *round4) Start() *tss.Error {
 		return round.WrapError(errors.New("paillier verify failed"), culprits...)
 	}
 
-	round.end <- *round.save
+	round.end <- round.save
 
 	return nil
 }
diff --git a/ecdsa/keygen/rounds.go b/ecdsa/keygen/rounds.go
index bd06a936..2d3e76fc 100644
--- a/ecdsa/keygen/rounds.go
+++ b/ecdsa/keygen/rounds.go
@@ -7,7 +7,10 @@
 package keygen
 
 import (
-	"github.com/binance-chain/tss-lib/tss"
+	"math/big"
+
+	"github.com/bnb-chain/tss-lib/v2/common"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 const (
@@ -20,7 +23,7 @@ type (
 		save    *LocalPartySaveData
 		temp    *localTempData
 		out     chan<- tss.Message
-		end     chan<- LocalPartySaveData
+		end     chan<- *LocalPartySaveData
 		ok      []bool // `ok` tracks parties which have been verified by Update()
 		started bool
 		number  int
@@ -94,3 +97,14 @@ func (round *base) resetOK() {
 		round.ok[j] = false
 	}
 }
+
+// get ssid from local params
+func (round *base) getSSID() ([]byte, error) {
+	ssidList := []*big.Int{round.EC().Params().P, round.EC().Params().N, round.EC().Params().Gx, round.EC().Params().Gy} // ec curve
+	ssidList = append(ssidList, round.Parties().IDs().Keys()...)
+	ssidList = append(ssidList, big.NewInt(int64(round.number))) // round number
+	ssidList = append(ssidList, round.temp.ssidNonce)
+	ssid := common.SHA512_256i(ssidList...).Bytes()
+
+	return ssid, nil
+}
diff --git a/ecdsa/keygen/save_data.go b/ecdsa/keygen/save_data.go
index dff764a7..ec43d436 100644
--- a/ecdsa/keygen/save_data.go
+++ b/ecdsa/keygen/save_data.go
@@ -8,12 +8,12 @@ package keygen
 
 import (
 	"encoding/hex"
+	"errors"
 	"math/big"
 
-	"github.com/binance-chain/tss-lib/common"
-	"github.com/binance-chain/tss-lib/crypto"
-	"github.com/binance-chain/tss-lib/crypto/paillier"
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/crypto"
+	"github.com/bnb-chain/tss-lib/v2/crypto/paillier"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 type (
@@ -68,6 +68,8 @@ func (preParams LocalPreParams) Validate() bool {
 
 func (preParams LocalPreParams) ValidateWithProof() bool {
 	return preParams.Validate() &&
+		preParams.PaillierSK.P != nil &&
+		preParams.PaillierSK.Q != nil &&
 		preParams.Alpha != nil &&
 		preParams.Beta != nil &&
 		preParams.P != nil &&
@@ -87,7 +89,7 @@ func BuildLocalSaveDataSubset(sourceData LocalPartySaveData, sortedIDs tss.Sorte
 	for j, id := range sortedIDs {
 		savedIdx, ok := keysToIndices[hex.EncodeToString(id.Key)]
 		if !ok {
-			common.Logger.Warning("BuildLocalSaveDataSubset: unable to find a signer party in the local save data", id)
+			panic(errors.New("BuildLocalSaveDataSubset: unable to find a signer party in the local save data"))
 		}
 		newData.Ks[j] = sourceData.Ks[savedIdx]
 		newData.NTildej[j] = sourceData.NTildej[savedIdx]
diff --git a/ecdsa/keygen/test_utils.go b/ecdsa/keygen/test_utils.go
index c90b4472..0169865e 100644
--- a/ecdsa/keygen/test_utils.go
+++ b/ecdsa/keygen/test_utils.go
@@ -18,8 +18,8 @@ import (
 
 	"github.com/pkg/errors"
 
-	"github.com/binance-chain/tss-lib/test"
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/test"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 const (
@@ -53,6 +53,10 @@ func LoadKeygenTestFixtures(qty int, optionalStart ...int) ([]LocalPartySaveData
 				"could not unmarshal fixture data for party %d located at: %s",
 				i, fixtureFilePath)
 		}
+		for _, kbxj := range key.BigXj {
+			kbxj.SetCurve(tss.S256())
+		}
+		key.ECDSAPub.SetCurve(tss.S256())
 		keys = append(keys, key)
 	}
 	partyIDs := make(tss.UnSortedPartyIDs, len(keys))
@@ -87,6 +91,10 @@ func LoadKeygenTestFixturesRandomSet(qty, fixtureCount int) ([]LocalPartySaveDat
 				"could not unmarshal fixture data for party %d located at: %s",
 				i, fixtureFilePath)
 		}
+		for _, kbxj := range key.BigXj {
+			kbxj.SetCurve(tss.S256())
+		}
+		key.ECDSAPub.SetCurve(tss.S256())
 		keys = append(keys, key)
 	}
 	partyIDs := make(tss.UnSortedPartyIDs, len(keys))
diff --git a/ecdsa/resharing/ecdsa-resharing.pb.go b/ecdsa/resharing/ecdsa-resharing.pb.go
index 30b49d35..e418b08c 100644
--- a/ecdsa/resharing/ecdsa-resharing.pb.go
+++ b/ecdsa/resharing/ecdsa-resharing.pb.go
@@ -1,78 +1,100 @@
+// Copyright © 2019 Binance
+//
+// This file is part of Binance. The full Binance copyright notice, including
+// terms governing use, modification, and redistribution, is contained in the
+// file LICENSE at the root of the source code distribution tree.
+
 // Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.28.0
+// 	protoc        v3.19.4
 // source: protob/ecdsa-resharing.proto
 
 package resharing
 
 import (
-	fmt "fmt"
-	proto "github.com/golang/protobuf/proto"
-	math "math"
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
 )
 
-// Reference imports to suppress errors if they are not otherwise used.
-var _ = proto.Marshal
-var _ = fmt.Errorf
-var _ = math.Inf
-
-// This is a compile-time assertion to ensure that this generated file
-// is compatible with the proto package it is being compiled against.
-// A compilation error at this line likely means your copy of the
-// proto package needs to be updated.
-const _ = proto.ProtoPackageIsVersion3 // please upgrade the proto package
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
 
 //
 // The Round 1 data is broadcast to peers of the New Committee in this message.
 type DGRound1Message struct {
-	EcdsaPubX            []byte   `protobuf:"bytes,1,opt,name=ecdsa_pub_x,json=ecdsaPubX,proto3" json:"ecdsa_pub_x,omitempty"`
-	EcdsaPubY            []byte   `protobuf:"bytes,2,opt,name=ecdsa_pub_y,json=ecdsaPubY,proto3" json:"ecdsa_pub_y,omitempty"`
-	VCommitment          []byte   `protobuf:"bytes,3,opt,name=v_commitment,json=vCommitment,proto3" json:"v_commitment,omitempty"`
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	EcdsaPubX   []byte `protobuf:"bytes,1,opt,name=ecdsa_pub_x,json=ecdsaPubX,proto3" json:"ecdsa_pub_x,omitempty"`
+	EcdsaPubY   []byte `protobuf:"bytes,2,opt,name=ecdsa_pub_y,json=ecdsaPubY,proto3" json:"ecdsa_pub_y,omitempty"`
+	VCommitment []byte `protobuf:"bytes,3,opt,name=v_commitment,json=vCommitment,proto3" json:"v_commitment,omitempty"`
+	Ssid        []byte `protobuf:"bytes,4,opt,name=ssid,proto3" json:"ssid,omitempty"`
+}
+
+func (x *DGRound1Message) Reset() {
+	*x = DGRound1Message{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_protob_ecdsa_resharing_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
 }
 
-func (m *DGRound1Message) Reset()         { *m = DGRound1Message{} }
-func (m *DGRound1Message) String() string { return proto.CompactTextString(m) }
-func (*DGRound1Message) ProtoMessage()    {}
-func (*DGRound1Message) Descriptor() ([]byte, []int) {
-	return fileDescriptor_f7d3ae1dc68dc295, []int{0}
+func (x *DGRound1Message) String() string {
+	return protoimpl.X.MessageStringOf(x)
 }
 
-func (m *DGRound1Message) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_DGRound1Message.Unmarshal(m, b)
-}
-func (m *DGRound1Message) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_DGRound1Message.Marshal(b, m, deterministic)
-}
-func (m *DGRound1Message) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_DGRound1Message.Merge(m, src)
-}
-func (m *DGRound1Message) XXX_Size() int {
-	return xxx_messageInfo_DGRound1Message.Size(m)
+func (*DGRound1Message) ProtoMessage() {}
+
+func (x *DGRound1Message) ProtoReflect() protoreflect.Message {
+	mi := &file_protob_ecdsa_resharing_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
 }
-func (m *DGRound1Message) XXX_DiscardUnknown() {
-	xxx_messageInfo_DGRound1Message.DiscardUnknown(m)
+
+// Deprecated: Use DGRound1Message.ProtoReflect.Descriptor instead.
+func (*DGRound1Message) Descriptor() ([]byte, []int) {
+	return file_protob_ecdsa_resharing_proto_rawDescGZIP(), []int{0}
 }
 
-var xxx_messageInfo_DGRound1Message proto.InternalMessageInfo
+func (x *DGRound1Message) GetEcdsaPubX() []byte {
+	if x != nil {
+		return x.EcdsaPubX
+	}
+	return nil
+}
 
-func (m *DGRound1Message) GetEcdsaPubX() []byte {
-	if m != nil {
-		return m.EcdsaPubX
+func (x *DGRound1Message) GetEcdsaPubY() []byte {
+	if x != nil {
+		return x.EcdsaPubY
 	}
 	return nil
 }
 
-func (m *DGRound1Message) GetEcdsaPubY() []byte {
-	if m != nil {
-		return m.EcdsaPubY
+func (x *DGRound1Message) GetVCommitment() []byte {
+	if x != nil {
+		return x.VCommitment
 	}
 	return nil
 }
 
-func (m *DGRound1Message) GetVCommitment() []byte {
-	if m != nil {
-		return m.VCommitment
+func (x *DGRound1Message) GetSsid() []byte {
+	if x != nil {
+		return x.Ssid
 	}
 	return nil
 }
@@ -80,88 +102,96 @@ func (m *DGRound1Message) GetVCommitment() []byte {
 //
 // The Round 2 data is broadcast to other peers of the New Committee in this message.
 type DGRound2Message1 struct {
-	PaillierN            []byte   `protobuf:"bytes,1,opt,name=paillier_n,json=paillierN,proto3" json:"paillier_n,omitempty"`
-	PaillierProof        [][]byte `protobuf:"bytes,2,rep,name=paillier_proof,json=paillierProof,proto3" json:"paillier_proof,omitempty"`
-	NTilde               []byte   `protobuf:"bytes,3,opt,name=n_tilde,json=nTilde,proto3" json:"n_tilde,omitempty"`
-	H1                   []byte   `protobuf:"bytes,4,opt,name=h1,proto3" json:"h1,omitempty"`
-	H2                   []byte   `protobuf:"bytes,5,opt,name=h2,proto3" json:"h2,omitempty"`
-	Dlnproof_1           [][]byte `protobuf:"bytes,6,rep,name=dlnproof_1,json=dlnproof1,proto3" json:"dlnproof_1,omitempty"`
-	Dlnproof_2           [][]byte `protobuf:"bytes,7,rep,name=dlnproof_2,json=dlnproof2,proto3" json:"dlnproof_2,omitempty"`
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
-}
-
-func (m *DGRound2Message1) Reset()         { *m = DGRound2Message1{} }
-func (m *DGRound2Message1) String() string { return proto.CompactTextString(m) }
-func (*DGRound2Message1) ProtoMessage()    {}
-func (*DGRound2Message1) Descriptor() ([]byte, []int) {
-	return fileDescriptor_f7d3ae1dc68dc295, []int{1}
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	PaillierN  []byte   `protobuf:"bytes,1,opt,name=paillier_n,json=paillierN,proto3" json:"paillier_n,omitempty"`
+	ModProof   [][]byte `protobuf:"bytes,2,rep,name=modProof,proto3" json:"modProof,omitempty"`
+	NTilde     []byte   `protobuf:"bytes,3,opt,name=n_tilde,json=nTilde,proto3" json:"n_tilde,omitempty"`
+	H1         []byte   `protobuf:"bytes,4,opt,name=h1,proto3" json:"h1,omitempty"`
+	H2         []byte   `protobuf:"bytes,5,opt,name=h2,proto3" json:"h2,omitempty"`
+	Dlnproof_1 [][]byte `protobuf:"bytes,6,rep,name=dlnproof_1,json=dlnproof1,proto3" json:"dlnproof_1,omitempty"`
+	Dlnproof_2 [][]byte `protobuf:"bytes,7,rep,name=dlnproof_2,json=dlnproof2,proto3" json:"dlnproof_2,omitempty"`
+}
+
+func (x *DGRound2Message1) Reset() {
+	*x = DGRound2Message1{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_protob_ecdsa_resharing_proto_msgTypes[1]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
 }
 
-func (m *DGRound2Message1) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_DGRound2Message1.Unmarshal(m, b)
-}
-func (m *DGRound2Message1) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_DGRound2Message1.Marshal(b, m, deterministic)
-}
-func (m *DGRound2Message1) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_DGRound2Message1.Merge(m, src)
+func (x *DGRound2Message1) String() string {
+	return protoimpl.X.MessageStringOf(x)
 }
-func (m *DGRound2Message1) XXX_Size() int {
-	return xxx_messageInfo_DGRound2Message1.Size(m)
-}
-func (m *DGRound2Message1) XXX_DiscardUnknown() {
-	xxx_messageInfo_DGRound2Message1.DiscardUnknown(m)
+
+func (*DGRound2Message1) ProtoMessage() {}
+
+func (x *DGRound2Message1) ProtoReflect() protoreflect.Message {
+	mi := &file_protob_ecdsa_resharing_proto_msgTypes[1]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
 }
 
-var xxx_messageInfo_DGRound2Message1 proto.InternalMessageInfo
+// Deprecated: Use DGRound2Message1.ProtoReflect.Descriptor instead.
+func (*DGRound2Message1) Descriptor() ([]byte, []int) {
+	return file_protob_ecdsa_resharing_proto_rawDescGZIP(), []int{1}
+}
 
-func (m *DGRound2Message1) GetPaillierN() []byte {
-	if m != nil {
-		return m.PaillierN
+func (x *DGRound2Message1) GetPaillierN() []byte {
+	if x != nil {
+		return x.PaillierN
 	}
 	return nil
 }
 
-func (m *DGRound2Message1) GetPaillierProof() [][]byte {
-	if m != nil {
-		return m.PaillierProof
+func (x *DGRound2Message1) GetModProof() [][]byte {
+	if x != nil {
+		return x.ModProof
 	}
 	return nil
 }
 
-func (m *DGRound2Message1) GetNTilde() []byte {
-	if m != nil {
-		return m.NTilde
+func (x *DGRound2Message1) GetNTilde() []byte {
+	if x != nil {
+		return x.NTilde
 	}
 	return nil
 }
 
-func (m *DGRound2Message1) GetH1() []byte {
-	if m != nil {
-		return m.H1
+func (x *DGRound2Message1) GetH1() []byte {
+	if x != nil {
+		return x.H1
 	}
 	return nil
 }
 
-func (m *DGRound2Message1) GetH2() []byte {
-	if m != nil {
-		return m.H2
+func (x *DGRound2Message1) GetH2() []byte {
+	if x != nil {
+		return x.H2
 	}
 	return nil
 }
 
-func (m *DGRound2Message1) GetDlnproof_1() [][]byte {
-	if m != nil {
-		return m.Dlnproof_1
+func (x *DGRound2Message1) GetDlnproof_1() [][]byte {
+	if x != nil {
+		return x.Dlnproof_1
 	}
 	return nil
 }
 
-func (m *DGRound2Message1) GetDlnproof_2() [][]byte {
-	if m != nil {
-		return m.Dlnproof_2
+func (x *DGRound2Message1) GetDlnproof_2() [][]byte {
+	if x != nil {
+		return x.Dlnproof_2
 	}
 	return nil
 }
@@ -169,181 +199,411 @@ func (m *DGRound2Message1) GetDlnproof_2() [][]byte {
 //
 // The Round 2 "ACK" is broadcast to peers of the Old Committee in this message.
 type DGRound2Message2 struct {
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
 }
 
-func (m *DGRound2Message2) Reset()         { *m = DGRound2Message2{} }
-func (m *DGRound2Message2) String() string { return proto.CompactTextString(m) }
-func (*DGRound2Message2) ProtoMessage()    {}
-func (*DGRound2Message2) Descriptor() ([]byte, []int) {
-	return fileDescriptor_f7d3ae1dc68dc295, []int{2}
+func (x *DGRound2Message2) Reset() {
+	*x = DGRound2Message2{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_protob_ecdsa_resharing_proto_msgTypes[2]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
 }
 
-func (m *DGRound2Message2) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_DGRound2Message2.Unmarshal(m, b)
+func (x *DGRound2Message2) String() string {
+	return protoimpl.X.MessageStringOf(x)
 }
-func (m *DGRound2Message2) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_DGRound2Message2.Marshal(b, m, deterministic)
-}
-func (m *DGRound2Message2) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_DGRound2Message2.Merge(m, src)
-}
-func (m *DGRound2Message2) XXX_Size() int {
-	return xxx_messageInfo_DGRound2Message2.Size(m)
-}
-func (m *DGRound2Message2) XXX_DiscardUnknown() {
-	xxx_messageInfo_DGRound2Message2.DiscardUnknown(m)
+
+func (*DGRound2Message2) ProtoMessage() {}
+
+func (x *DGRound2Message2) ProtoReflect() protoreflect.Message {
+	mi := &file_protob_ecdsa_resharing_proto_msgTypes[2]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
 }
 
-var xxx_messageInfo_DGRound2Message2 proto.InternalMessageInfo
+// Deprecated: Use DGRound2Message2.ProtoReflect.Descriptor instead.
+func (*DGRound2Message2) Descriptor() ([]byte, []int) {
+	return file_protob_ecdsa_resharing_proto_rawDescGZIP(), []int{2}
+}
 
 //
 // The Round 3 data is sent to peers of the New Committee in this message.
 type DGRound3Message1 struct {
-	Share                []byte   `protobuf:"bytes,1,opt,name=share,proto3" json:"share,omitempty"`
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Share []byte `protobuf:"bytes,1,opt,name=share,proto3" json:"share,omitempty"`
+}
+
+func (x *DGRound3Message1) Reset() {
+	*x = DGRound3Message1{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_protob_ecdsa_resharing_proto_msgTypes[3]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *DGRound3Message1) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*DGRound3Message1) ProtoMessage() {}
+
+func (x *DGRound3Message1) ProtoReflect() protoreflect.Message {
+	mi := &file_protob_ecdsa_resharing_proto_msgTypes[3]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
 }
 
-func (m *DGRound3Message1) Reset()         { *m = DGRound3Message1{} }
-func (m *DGRound3Message1) String() string { return proto.CompactTextString(m) }
-func (*DGRound3Message1) ProtoMessage()    {}
+// Deprecated: Use DGRound3Message1.ProtoReflect.Descriptor instead.
 func (*DGRound3Message1) Descriptor() ([]byte, []int) {
-	return fileDescriptor_f7d3ae1dc68dc295, []int{3}
+	return file_protob_ecdsa_resharing_proto_rawDescGZIP(), []int{3}
 }
 
-func (m *DGRound3Message1) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_DGRound3Message1.Unmarshal(m, b)
+func (x *DGRound3Message1) GetShare() []byte {
+	if x != nil {
+		return x.Share
+	}
+	return nil
 }
-func (m *DGRound3Message1) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_DGRound3Message1.Marshal(b, m, deterministic)
+
+//
+// The Round 3 data is broadcast to peers of the New Committee in this message.
+type DGRound3Message2 struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	VDecommitment [][]byte `protobuf:"bytes,1,rep,name=v_decommitment,json=vDecommitment,proto3" json:"v_decommitment,omitempty"`
 }
-func (m *DGRound3Message1) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_DGRound3Message1.Merge(m, src)
+
+func (x *DGRound3Message2) Reset() {
+	*x = DGRound3Message2{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_protob_ecdsa_resharing_proto_msgTypes[4]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
 }
-func (m *DGRound3Message1) XXX_Size() int {
-	return xxx_messageInfo_DGRound3Message1.Size(m)
+
+func (x *DGRound3Message2) String() string {
+	return protoimpl.X.MessageStringOf(x)
 }
-func (m *DGRound3Message1) XXX_DiscardUnknown() {
-	xxx_messageInfo_DGRound3Message1.DiscardUnknown(m)
+
+func (*DGRound3Message2) ProtoMessage() {}
+
+func (x *DGRound3Message2) ProtoReflect() protoreflect.Message {
+	mi := &file_protob_ecdsa_resharing_proto_msgTypes[4]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
 }
 
-var xxx_messageInfo_DGRound3Message1 proto.InternalMessageInfo
+// Deprecated: Use DGRound3Message2.ProtoReflect.Descriptor instead.
+func (*DGRound3Message2) Descriptor() ([]byte, []int) {
+	return file_protob_ecdsa_resharing_proto_rawDescGZIP(), []int{4}
+}
 
-func (m *DGRound3Message1) GetShare() []byte {
-	if m != nil {
-		return m.Share
+func (x *DGRound3Message2) GetVDecommitment() [][]byte {
+	if x != nil {
+		return x.VDecommitment
 	}
 	return nil
 }
 
 //
-// The Round 3 data is broadcast to peers of the New Committee in this message.
-type DGRound3Message2 struct {
-	VDecommitment        [][]byte `protobuf:"bytes,1,rep,name=v_decommitment,json=vDecommitment,proto3" json:"v_decommitment,omitempty"`
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
+// The Round 4 "ACK" is broadcast to peers of the Old and New Committees from the New Committee in this message.
+type DGRound4Message2 struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+}
+
+func (x *DGRound4Message2) Reset() {
+	*x = DGRound4Message2{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_protob_ecdsa_resharing_proto_msgTypes[5]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
 }
 
-func (m *DGRound3Message2) Reset()         { *m = DGRound3Message2{} }
-func (m *DGRound3Message2) String() string { return proto.CompactTextString(m) }
-func (*DGRound3Message2) ProtoMessage()    {}
-func (*DGRound3Message2) Descriptor() ([]byte, []int) {
-	return fileDescriptor_f7d3ae1dc68dc295, []int{4}
+func (x *DGRound4Message2) String() string {
+	return protoimpl.X.MessageStringOf(x)
 }
 
-func (m *DGRound3Message2) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_DGRound3Message2.Unmarshal(m, b)
+func (*DGRound4Message2) ProtoMessage() {}
+
+func (x *DGRound4Message2) ProtoReflect() protoreflect.Message {
+	mi := &file_protob_ecdsa_resharing_proto_msgTypes[5]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
 }
-func (m *DGRound3Message2) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_DGRound3Message2.Marshal(b, m, deterministic)
+
+// Deprecated: Use DGRound4Message2.ProtoReflect.Descriptor instead.
+func (*DGRound4Message2) Descriptor() ([]byte, []int) {
+	return file_protob_ecdsa_resharing_proto_rawDescGZIP(), []int{5}
 }
-func (m *DGRound3Message2) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_DGRound3Message2.Merge(m, src)
+
+//
+// The Round 4 message to peers of New Committees from the New Committee in this message.
+type DGRound4Message1 struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	FacProof [][]byte `protobuf:"bytes,1,rep,name=facProof,proto3" json:"facProof,omitempty"`
 }
-func (m *DGRound3Message2) XXX_Size() int {
-	return xxx_messageInfo_DGRound3Message2.Size(m)
+
+func (x *DGRound4Message1) Reset() {
+	*x = DGRound4Message1{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_protob_ecdsa_resharing_proto_msgTypes[6]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
 }
-func (m *DGRound3Message2) XXX_DiscardUnknown() {
-	xxx_messageInfo_DGRound3Message2.DiscardUnknown(m)
+
+func (x *DGRound4Message1) String() string {
+	return protoimpl.X.MessageStringOf(x)
 }
 
-var xxx_messageInfo_DGRound3Message2 proto.InternalMessageInfo
+func (*DGRound4Message1) ProtoMessage() {}
 
-func (m *DGRound3Message2) GetVDecommitment() [][]byte {
-	if m != nil {
-		return m.VDecommitment
+func (x *DGRound4Message1) ProtoReflect() protoreflect.Message {
+	mi := &file_protob_ecdsa_resharing_proto_msgTypes[6]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use DGRound4Message1.ProtoReflect.Descriptor instead.
+func (*DGRound4Message1) Descriptor() ([]byte, []int) {
+	return file_protob_ecdsa_resharing_proto_rawDescGZIP(), []int{6}
+}
+
+func (x *DGRound4Message1) GetFacProof() [][]byte {
+	if x != nil {
+		return x.FacProof
 	}
 	return nil
 }
 
-//
-// The Round 4 "ACK" is broadcast to peers of the Old and New Committees from the New Committee in this message.
-type DGRound4Message struct {
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
-}
-
-func (m *DGRound4Message) Reset()         { *m = DGRound4Message{} }
-func (m *DGRound4Message) String() string { return proto.CompactTextString(m) }
-func (*DGRound4Message) ProtoMessage()    {}
-func (*DGRound4Message) Descriptor() ([]byte, []int) {
-	return fileDescriptor_f7d3ae1dc68dc295, []int{5}
-}
-
-func (m *DGRound4Message) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_DGRound4Message.Unmarshal(m, b)
-}
-func (m *DGRound4Message) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_DGRound4Message.Marshal(b, m, deterministic)
-}
-func (m *DGRound4Message) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_DGRound4Message.Merge(m, src)
-}
-func (m *DGRound4Message) XXX_Size() int {
-	return xxx_messageInfo_DGRound4Message.Size(m)
-}
-func (m *DGRound4Message) XXX_DiscardUnknown() {
-	xxx_messageInfo_DGRound4Message.DiscardUnknown(m)
-}
-
-var xxx_messageInfo_DGRound4Message proto.InternalMessageInfo
-
-func init() {
-	proto.RegisterType((*DGRound1Message)(nil), "DGRound1Message")
-	proto.RegisterType((*DGRound2Message1)(nil), "DGRound2Message1")
-	proto.RegisterType((*DGRound2Message2)(nil), "DGRound2Message2")
-	proto.RegisterType((*DGRound3Message1)(nil), "DGRound3Message1")
-	proto.RegisterType((*DGRound3Message2)(nil), "DGRound3Message2")
-	proto.RegisterType((*DGRound4Message)(nil), "DGRound4Message")
-}
-
-func init() { proto.RegisterFile("protob/ecdsa-resharing.proto", fileDescriptor_f7d3ae1dc68dc295) }
-
-var fileDescriptor_f7d3ae1dc68dc295 = []byte{
-	// 303 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x64, 0x91, 0xcf, 0x4b, 0xc3, 0x30,
-	0x1c, 0xc5, 0x69, 0xe7, 0x3a, 0x96, 0xd5, 0xcd, 0x05, 0xc1, 0x1c, 0x54, 0x66, 0x40, 0xe8, 0x45,
-	0x47, 0x32, 0x2f, 0x5e, 0x75, 0xe0, 0x49, 0x19, 0xc5, 0x83, 0x7a, 0x09, 0xed, 0x1a, 0xd7, 0x42,
-	0x9b, 0x94, 0xfe, 0x42, 0xff, 0x4a, 0xff, 0x25, 0x69, 0x96, 0x86, 0x95, 0x1d, 0xdf, 0xe7, 0x7d,
-	0x9b, 0xc7, 0xeb, 0x03, 0x97, 0x79, 0x21, 0x2b, 0x19, 0x2e, 0xf9, 0x36, 0x2a, 0x83, 0xbb, 0x82,
-	0x97, 0x71, 0x50, 0x24, 0x62, 0x77, 0xaf, 0x30, 0xae, 0xc0, 0x6c, 0xfd, 0xe2, 0xcb, 0x5a, 0x44,
-	0xe4, 0x95, 0x97, 0x65, 0xb0, 0xe3, 0xf0, 0x1a, 0x4c, 0xd4, 0x2d, 0xcb, 0xeb, 0x90, 0xfd, 0x20,
-	0x6b, 0x61, 0x79, 0xae, 0x3f, 0x56, 0x68, 0x53, 0x87, 0x1f, 0x7d, 0xff, 0x17, 0xd9, 0x7d, 0xff,
-	0x13, 0xde, 0x00, 0xb7, 0x61, 0x5b, 0x99, 0x65, 0x49, 0x95, 0x71, 0x51, 0xa1, 0x81, 0x3a, 0x98,
-	0x34, 0xcf, 0x06, 0xe1, 0x3f, 0x0b, 0x9c, 0xe9, 0x58, 0xaa, 0x63, 0x09, 0xbc, 0x02, 0x20, 0x0f,
-	0x92, 0x34, 0x4d, 0x78, 0xc1, 0x44, 0x17, 0xdb, 0x91, 0x37, 0x78, 0x0b, 0xa6, 0xc6, 0xce, 0x0b,
-	0x29, 0xbf, 0x91, 0xbd, 0x18, 0x78, 0xae, 0x7f, 0xda, 0xd1, 0x4d, 0x0b, 0xe1, 0x05, 0x18, 0x09,
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+var File_protob_ecdsa_resharing_proto protoreflect.FileDescriptor
+
+var file_protob_ecdsa_resharing_proto_rawDesc = []byte{
+	0x0a, 0x1c, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x62, 0x2f, 0x65, 0x63, 0x64, 0x73, 0x61, 0x2d, 0x72,
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+	0x6e, 0x74, 0x18, 0x03, 0x20, 0x01, 0x28, 0x0c, 0x52, 0x0b, 0x76, 0x43, 0x6f, 0x6d, 0x6d, 0x69,
+	0x74, 0x6d, 0x65, 0x6e, 0x74, 0x12, 0x12, 0x0a, 0x04, 0x73, 0x73, 0x69, 0x64, 0x18, 0x04, 0x20,
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+	0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+}
+
+var (
+	file_protob_ecdsa_resharing_proto_rawDescOnce sync.Once
+	file_protob_ecdsa_resharing_proto_rawDescData = file_protob_ecdsa_resharing_proto_rawDesc
+)
+
+func file_protob_ecdsa_resharing_proto_rawDescGZIP() []byte {
+	file_protob_ecdsa_resharing_proto_rawDescOnce.Do(func() {
+		file_protob_ecdsa_resharing_proto_rawDescData = protoimpl.X.CompressGZIP(file_protob_ecdsa_resharing_proto_rawDescData)
+	})
+	return file_protob_ecdsa_resharing_proto_rawDescData
+}
+
+var file_protob_ecdsa_resharing_proto_msgTypes = make([]protoimpl.MessageInfo, 7)
+var file_protob_ecdsa_resharing_proto_goTypes = []interface{}{
+	(*DGRound1Message)(nil),  // 0: binance.tsslib.ecdsa.resharing.DGRound1Message
+	(*DGRound2Message1)(nil), // 1: binance.tsslib.ecdsa.resharing.DGRound2Message1
+	(*DGRound2Message2)(nil), // 2: binance.tsslib.ecdsa.resharing.DGRound2Message2
+	(*DGRound3Message1)(nil), // 3: binance.tsslib.ecdsa.resharing.DGRound3Message1
+	(*DGRound3Message2)(nil), // 4: binance.tsslib.ecdsa.resharing.DGRound3Message2
+	(*DGRound4Message2)(nil), // 5: binance.tsslib.ecdsa.resharing.DGRound4Message2
+	(*DGRound4Message1)(nil), // 6: binance.tsslib.ecdsa.resharing.DGRound4Message1
+}
+var file_protob_ecdsa_resharing_proto_depIdxs = []int32{
+	0, // [0:0] is the sub-list for method output_type
+	0, // [0:0] is the sub-list for method input_type
+	0, // [0:0] is the sub-list for extension type_name
+	0, // [0:0] is the sub-list for extension extendee
+	0, // [0:0] is the sub-list for field type_name
+}
+
+func init() { file_protob_ecdsa_resharing_proto_init() }
+func file_protob_ecdsa_resharing_proto_init() {
+	if File_protob_ecdsa_resharing_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_protob_ecdsa_resharing_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*DGRound1Message); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_protob_ecdsa_resharing_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*DGRound2Message1); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_protob_ecdsa_resharing_proto_msgTypes[2].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*DGRound2Message2); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_protob_ecdsa_resharing_proto_msgTypes[3].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*DGRound3Message1); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_protob_ecdsa_resharing_proto_msgTypes[4].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*DGRound3Message2); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_protob_ecdsa_resharing_proto_msgTypes[5].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*DGRound4Message2); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_protob_ecdsa_resharing_proto_msgTypes[6].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*DGRound4Message1); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_protob_ecdsa_resharing_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   7,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_protob_ecdsa_resharing_proto_goTypes,
+		DependencyIndexes: file_protob_ecdsa_resharing_proto_depIdxs,
+		MessageInfos:      file_protob_ecdsa_resharing_proto_msgTypes,
+	}.Build()
+	File_protob_ecdsa_resharing_proto = out.File
+	file_protob_ecdsa_resharing_proto_rawDesc = nil
+	file_protob_ecdsa_resharing_proto_goTypes = nil
+	file_protob_ecdsa_resharing_proto_depIdxs = nil
 }
diff --git a/ecdsa/resharing/local_party.go b/ecdsa/resharing/local_party.go
index 3b6ddaf0..85faf4c5 100644
--- a/ecdsa/resharing/local_party.go
+++ b/ecdsa/resharing/local_party.go
@@ -10,12 +10,12 @@ import (
 	"fmt"
 	"math/big"
 
-	"github.com/binance-chain/tss-lib/common"
-	"github.com/binance-chain/tss-lib/crypto"
-	cmt "github.com/binance-chain/tss-lib/crypto/commitments"
-	"github.com/binance-chain/tss-lib/crypto/vss"
-	"github.com/binance-chain/tss-lib/ecdsa/keygen"
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/common"
+	"github.com/bnb-chain/tss-lib/v2/crypto"
+	cmt "github.com/bnb-chain/tss-lib/v2/crypto/commitments"
+	"github.com/bnb-chain/tss-lib/v2/crypto/vss"
+	"github.com/bnb-chain/tss-lib/v2/ecdsa/keygen"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 // Implements Party
@@ -33,7 +33,7 @@ type (
 
 		// outbound messaging
 		out chan<- tss.Message
-		end chan<- keygen.LocalPartySaveData
+		end chan<- *keygen.LocalPartySaveData
 	}
 
 	localMessageStore struct {
@@ -42,7 +42,8 @@ type (
 		dgRound2Message2s,
 		dgRound3Message1s,
 		dgRound3Message2s,
-		dgRound4Messages []tss.ParsedMessage
+		dgRound4Message1s,
+		dgRound4Message2s []tss.ParsedMessage
 	}
 
 	localTempData struct {
@@ -57,6 +58,9 @@ type (
 		newXi     *big.Int
 		newKs     []*big.Int
 		newBigXjs []*crypto.ECPoint // Xj to save in round 5
+
+		ssid      []byte
+		ssidNonce *big.Int
 	}
 )
 
@@ -68,7 +72,7 @@ func NewLocalParty(
 	params *tss.ReSharingParameters,
 	key keygen.LocalPartySaveData,
 	out chan<- tss.Message,
-	end chan<- keygen.LocalPartySaveData,
+	end chan<- *keygen.LocalPartySaveData,
 ) tss.Party {
 	oldPartyCount := len(params.OldParties().IDs())
 	subset := key
@@ -90,7 +94,8 @@ func NewLocalParty(
 	p.temp.dgRound2Message2s = make([]tss.ParsedMessage, params.NewPartyCount()) // "
 	p.temp.dgRound3Message1s = make([]tss.ParsedMessage, oldPartyCount)          // from t+1 of Old Committee
 	p.temp.dgRound3Message2s = make([]tss.ParsedMessage, oldPartyCount)          // "
-	p.temp.dgRound4Messages = make([]tss.ParsedMessage, params.NewPartyCount())  // from n of New Committee
+	p.temp.dgRound4Message1s = make([]tss.ParsedMessage, params.NewPartyCount()) // from n of New Committee
+	p.temp.dgRound4Message2s = make([]tss.ParsedMessage, params.NewPartyCount()) // from n of New Committee
 	// save data init
 	if key.LocalPreParams.ValidateWithProof() {
 		p.save.LocalPreParams = key.LocalPreParams
@@ -125,7 +130,7 @@ func (p *LocalParty) ValidateMessage(msg tss.ParsedMessage) (bool, *tss.Error) {
 	// check that the message's "from index" will fit into the array
 	var maxFromIdx int
 	switch msg.Content().(type) {
-	case *DGRound2Message1, *DGRound2Message2, *DGRound4Message:
+	case *DGRound2Message1, *DGRound2Message2, *DGRound4Message1, *DGRound4Message2:
 		maxFromIdx = len(p.params.NewParties().IDs()) - 1
 	default:
 		maxFromIdx = len(p.params.OldParties().IDs()) - 1
@@ -157,8 +162,10 @@ func (p *LocalParty) StoreMessage(msg tss.ParsedMessage) (bool, *tss.Error) {
 		p.temp.dgRound3Message1s[fromPIdx] = msg
 	case *DGRound3Message2:
 		p.temp.dgRound3Message2s[fromPIdx] = msg
-	case *DGRound4Message:
-		p.temp.dgRound4Messages[fromPIdx] = msg
+	case *DGRound4Message1:
+		p.temp.dgRound4Message1s[fromPIdx] = msg
+	case *DGRound4Message2:
+		p.temp.dgRound4Message2s[fromPIdx] = msg
 	default: // unrecognised message, just ignore!
 		common.Logger.Warningf("unrecognised message ignored: %v", msg)
 		return false, nil
diff --git a/ecdsa/resharing/local_party_test.go b/ecdsa/resharing/local_party_test.go
index 35395b41..e205c5e1 100644
--- a/ecdsa/resharing/local_party_test.go
+++ b/ecdsa/resharing/local_party_test.go
@@ -17,13 +17,13 @@ import (
 	"github.com/ipfs/go-log"
 	"github.com/stretchr/testify/assert"
 
-	"github.com/binance-chain/tss-lib/common"
-	"github.com/binance-chain/tss-lib/crypto"
-	"github.com/binance-chain/tss-lib/ecdsa/keygen"
-	. "github.com/binance-chain/tss-lib/ecdsa/resharing"
-	"github.com/binance-chain/tss-lib/ecdsa/signing"
-	"github.com/binance-chain/tss-lib/test"
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/common"
+	"github.com/bnb-chain/tss-lib/v2/crypto"
+	"github.com/bnb-chain/tss-lib/v2/ecdsa/keygen"
+	. "github.com/bnb-chain/tss-lib/v2/ecdsa/resharing"
+	"github.com/bnb-chain/tss-lib/v2/ecdsa/signing"
+	"github.com/bnb-chain/tss-lib/v2/test"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 const (
@@ -45,7 +45,7 @@ func TestE2EConcurrent(t *testing.T) {
 	threshold, newThreshold := testThreshold, testThreshold
 
 	// PHASE: load keygen fixtures
-	firstPartyIdx, extraParties := 5, 1 // extra can be 0 to N-first
+	firstPartyIdx, extraParties := 1, 1 // extra can be 0 to N-first
 	oldKeys, oldPIDs, err := keygen.LoadKeygenTestFixtures(testThreshold+1+extraParties+firstPartyIdx, firstPartyIdx)
 	assert.NoError(t, err, "should load keygen fixtures")
 
@@ -66,19 +66,23 @@ func TestE2EConcurrent(t *testing.T) {
 
 	errCh := make(chan *tss.Error, bothCommitteesPax)
 	outCh := make(chan tss.Message, bothCommitteesPax)
-	endCh := make(chan keygen.LocalPartySaveData, bothCommitteesPax)
+	endCh := make(chan *keygen.LocalPartySaveData, bothCommitteesPax)
 
 	updater := test.SharedPartyUpdater
 
 	// init the old parties first
 	for j, pID := range oldPIDs {
-		params := tss.NewReSharingParameters(oldP2PCtx, newP2PCtx, pID, testParticipants, threshold, newPCount, newThreshold)
+		params := tss.NewReSharingParameters(tss.S256(), oldP2PCtx, newP2PCtx, pID, testParticipants, threshold, newPCount, newThreshold)
 		P := NewLocalParty(params, oldKeys[j], outCh, endCh).(*LocalParty) // discard old key data
 		oldCommittee = append(oldCommittee, P)
 	}
 	// init the new parties
 	for j, pID := range newPIDs {
-		params := tss.NewReSharingParameters(oldP2PCtx, newP2PCtx, pID, testParticipants, threshold, newPCount, newThreshold)
+		params := tss.NewReSharingParameters(tss.S256(), oldP2PCtx, newP2PCtx, pID, testParticipants, threshold, newPCount, newThreshold)
+		// do not use in untrusted setting
+		params.SetNoProofMod()
+		// do not use in untrusted setting
+		params.SetNoProofFac()
 		save := keygen.NewLocalPartySaveData(newPCount)
 		if j < len(fixtures) && len(newPIDs) <= len(fixtures) {
 			save.LocalPreParams = fixtures[j].LocalPreParams
@@ -136,11 +140,12 @@ func TestE2EConcurrent(t *testing.T) {
 			if save.Xi != nil {
 				index, err := save.OriginalIndex()
 				assert.NoErrorf(t, err, "should not be an error getting a party's index from save data")
-				newKeys[index] = save
+				newKeys[index] = *save
 			} else {
 				endedOldCommittee++
 			}
 			atomic.AddInt32(&reSharingEnded, 1)
+			fmt.Println("TODO old:", len(oldCommittee), "new:", len(newCommittee), "finished:", reSharingEnded)
 			if atomic.LoadInt32(&reSharingEnded) == int32(len(oldCommittee)+len(newCommittee)) {
 				assert.Equal(t, len(oldCommittee), endedOldCommittee)
 				t.Logf("Resharing done. Reshared %d participants", reSharingEnded)
@@ -149,7 +154,7 @@ func TestE2EConcurrent(t *testing.T) {
 				for j, key := range newKeys {
 					// xj test: BigXj == xj*G
 					xj := key.Xi
-					gXj := crypto.ScalarBaseMult(tss.EC(), xj)
+					gXj := crypto.ScalarBaseMult(tss.S256(), xj)
 					BigXj := key.BigXj[j]
 					assert.True(t, BigXj.Equals(gXj), "ensure BigX_j == g^x_j")
 				}
@@ -168,10 +173,10 @@ signing:
 
 	signErrCh := make(chan *tss.Error, len(signPIDs))
 	signOutCh := make(chan tss.Message, len(signPIDs))
-	signEndCh := make(chan common.SignatureData, len(signPIDs))
+	signEndCh := make(chan *common.SignatureData, len(signPIDs))
 
 	for j, signPID := range signPIDs {
-		params := tss.NewParameters(signP2pCtx, signPID, len(signPIDs), newThreshold)
+		params := tss.NewParameters(tss.S256(), signP2pCtx, signPID, len(signPIDs), newThreshold)
 		P := signing.NewLocalParty(big.NewInt(42), params, signKeys[j], signOutCh, signEndCh).(*signing.LocalParty)
 		signParties = append(signParties, P)
 		go func(P *signing.LocalParty) {
@@ -214,7 +219,7 @@ signing:
 				// BEGIN ECDSA verify
 				pkX, pkY := signKeys[0].ECDSAPub.X(), signKeys[0].ECDSAPub.Y()
 				pk := ecdsa.PublicKey{
-					Curve: tss.EC(),
+					Curve: tss.S256(),
 					X:     pkX,
 					Y:     pkY,
 				}
diff --git a/ecdsa/resharing/messages.go b/ecdsa/resharing/messages.go
index a04ca154..e9f3b3cb 100644
--- a/ecdsa/resharing/messages.go
+++ b/ecdsa/resharing/messages.go
@@ -7,17 +7,18 @@
 package resharing
 
 import (
+	"crypto/elliptic"
 	"math/big"
 
-	"github.com/golang/protobuf/proto"
-
-	"github.com/binance-chain/tss-lib/common"
-	"github.com/binance-chain/tss-lib/crypto"
-	cmt "github.com/binance-chain/tss-lib/crypto/commitments"
-	"github.com/binance-chain/tss-lib/crypto/dlnproof"
-	"github.com/binance-chain/tss-lib/crypto/paillier"
-	"github.com/binance-chain/tss-lib/crypto/vss"
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/common"
+	"github.com/bnb-chain/tss-lib/v2/crypto"
+	cmt "github.com/bnb-chain/tss-lib/v2/crypto/commitments"
+	"github.com/bnb-chain/tss-lib/v2/crypto/dlnproof"
+	"github.com/bnb-chain/tss-lib/v2/crypto/facproof"
+	"github.com/bnb-chain/tss-lib/v2/crypto/modproof"
+	"github.com/bnb-chain/tss-lib/v2/crypto/paillier"
+	"github.com/bnb-chain/tss-lib/v2/crypto/vss"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 // These messages were generated from Protocol Buffers definitions into ecdsa-resharing.pb.go
@@ -30,17 +31,11 @@ var (
 		(*DGRound2Message2)(nil),
 		(*DGRound3Message1)(nil),
 		(*DGRound3Message2)(nil),
+		(*DGRound4Message1)(nil),
+		(*DGRound4Message2)(nil),
 	}
 )
 
-func init() {
-	proto.RegisterType((*DGRound1Message)(nil), tss.ECDSAProtoNamePrefix+"resharing.DGRound1Message")
-	proto.RegisterType((*DGRound2Message1)(nil), tss.ECDSAProtoNamePrefix+"resharing.DGRound2Message1")
-	proto.RegisterType((*DGRound2Message2)(nil), tss.ECDSAProtoNamePrefix+"resharing.DGRound2Message2")
-	proto.RegisterType((*DGRound3Message1)(nil), tss.ECDSAProtoNamePrefix+"resharing.DGRound3Message1")
-	proto.RegisterType((*DGRound3Message2)(nil), tss.ECDSAProtoNamePrefix+"resharing.DGRound3Message2")
-}
-
 // ----- //
 
 func NewDGRound1Message(
@@ -48,6 +43,7 @@ func NewDGRound1Message(
 	from *tss.PartyID,
 	ecdsaPub *crypto.ECPoint,
 	vct cmt.HashCommitment,
+	ssid []byte,
 ) tss.ParsedMessage {
 	meta := tss.MessageRouting{
 		From:             from,
@@ -59,6 +55,7 @@ func NewDGRound1Message(
 		EcdsaPubX:   ecdsaPub.X().Bytes(),
 		EcdsaPubY:   ecdsaPub.Y().Bytes(),
 		VCommitment: vct.Bytes(),
+		Ssid:        ssid,
 	}
 	msg := tss.NewMessageWrapper(meta, content)
 	return tss.NewMessage(meta, content, msg)
@@ -71,9 +68,9 @@ func (m *DGRound1Message) ValidateBasic() bool {
 		common.NonEmptyBytes(m.VCommitment)
 }
 
-func (m *DGRound1Message) UnmarshalECDSAPub() (*crypto.ECPoint, error) {
+func (m *DGRound1Message) UnmarshalECDSAPub(ec elliptic.Curve) (*crypto.ECPoint, error) {
 	return crypto.NewECPoint(
-		tss.EC(),
+		ec,
 		new(big.Int).SetBytes(m.EcdsaPubX),
 		new(big.Int).SetBytes(m.EcdsaPubY))
 }
@@ -82,13 +79,17 @@ func (m *DGRound1Message) UnmarshalVCommitment() *big.Int {
 	return new(big.Int).SetBytes(m.GetVCommitment())
 }
 
+func (m *DGRound1Message) UnmarshalSSID() []byte {
+	return m.GetSsid()
+}
+
 // ----- //
 
 func NewDGRound2Message1(
 	to []*tss.PartyID,
 	from *tss.PartyID,
 	paillierPK *paillier.PublicKey,
-	paillierPf paillier.Proof,
+	modProof *modproof.ProofMod,
 	NTildei, H1i, H2i *big.Int,
 	dlnProof1, dlnProof2 *dlnproof.Proof,
 ) (tss.ParsedMessage, error) {
@@ -98,7 +99,7 @@ func NewDGRound2Message1(
 		IsBroadcast:      true,
 		IsToOldCommittee: false,
 	}
-	paiPfBzs := common.BigIntsToBytes(paillierPf[:])
+	modPfBzs := modProof.Bytes()
 	dlnProof1Bz, err := dlnProof1.Serialize()
 	if err != nil {
 		return nil, err
@@ -108,13 +109,13 @@ func NewDGRound2Message1(
 		return nil, err
 	}
 	content := &DGRound2Message1{
-		PaillierN:     paillierPK.N.Bytes(),
-		PaillierProof: paiPfBzs,
-		NTilde:        NTildei.Bytes(),
-		H1:            H1i.Bytes(),
-		H2:            H2i.Bytes(),
-		Dlnproof_1:    dlnProof1Bz,
-		Dlnproof_2:    dlnProof2Bz,
+		PaillierN:  paillierPK.N.Bytes(),
+		ModProof:   modPfBzs[:],
+		NTilde:     NTildei.Bytes(),
+		H1:         H1i.Bytes(),
+		H2:         H2i.Bytes(),
+		Dlnproof_1: dlnProof1Bz,
+		Dlnproof_2: dlnProof2Bz,
 	}
 	msg := tss.NewMessageWrapper(meta, content)
 	return tss.NewMessage(meta, content, msg), nil
@@ -122,7 +123,8 @@ func NewDGRound2Message1(
 
 func (m *DGRound2Message1) ValidateBasic() bool {
 	return m != nil &&
-		common.NonEmptyMultiBytes(m.PaillierProof) &&
+		// use with NoProofFac()
+		// common.NonEmptyMultiBytes(m.ModProof, modproof.ProofModBytesParts) &&
 		common.NonEmptyBytes(m.PaillierN) &&
 		common.NonEmptyBytes(m.NTilde) &&
 		common.NonEmptyBytes(m.H1) &&
@@ -150,11 +152,8 @@ func (m *DGRound2Message1) UnmarshalH2() *big.Int {
 	return new(big.Int).SetBytes(m.GetH2())
 }
 
-func (m *DGRound2Message1) UnmarshalPaillierProof() paillier.Proof {
-	var pf paillier.Proof
-	ints := common.MultiBytesToBigInts(m.PaillierProof)
-	copy(pf[:], ints[:paillier.ProofIters])
-	return pf
+func (m *DGRound2Message1) UnmarshalModProof() (*modproof.ProofMod, error) {
+	return modproof.NewProofFromBytes(m.GetModProof())
 }
 
 func (m *DGRound2Message1) UnmarshalDLNProof1() (*dlnproof.Proof, error) {
@@ -244,7 +243,7 @@ func (m *DGRound3Message2) UnmarshalVDeCommitment() cmt.HashDeCommitment {
 
 // ----- //
 
-func NewDGRound4Message(
+func NewDGRound4Message2(
 	to []*tss.PartyID,
 	from *tss.PartyID,
 ) tss.ParsedMessage {
@@ -254,11 +253,40 @@ func NewDGRound4Message(
 		IsBroadcast:             true,
 		IsToOldAndNewCommittees: true,
 	}
-	content := &DGRound4Message{}
+	content := &DGRound4Message2{}
 	msg := tss.NewMessageWrapper(meta, content)
 	return tss.NewMessage(meta, content, msg)
 }
 
-func (m *DGRound4Message) ValidateBasic() bool {
+func (m *DGRound4Message2) ValidateBasic() bool {
 	return true
 }
+
+func NewDGRound4Message1(
+	to *tss.PartyID,
+	from *tss.PartyID,
+	proof *facproof.ProofFac,
+) tss.ParsedMessage {
+	meta := tss.MessageRouting{
+		From:             from,
+		To:               []*tss.PartyID{to},
+		IsBroadcast:      false,
+		IsToOldCommittee: false,
+	}
+	pfBzs := proof.Bytes()
+	content := &DGRound4Message1{
+		FacProof: pfBzs[:],
+	}
+	msg := tss.NewMessageWrapper(meta, content)
+	return tss.NewMessage(meta, content, msg)
+}
+
+func (m *DGRound4Message1) ValidateBasic() bool {
+	return m != nil
+	// use with NoProofFac()
+	// && common.NonEmptyMultiBytes(m.GetFacProof(), facproof.ProofFacBytesParts)
+}
+
+func (m *DGRound4Message1) UnmarshalFacProof() (*facproof.ProofFac, error) {
+	return facproof.NewProofFromBytes(m.GetFacProof())
+}
diff --git a/ecdsa/resharing/round_1_old_step_1.go b/ecdsa/resharing/round_1_old_step_1.go
index 868c21ff..c178b7ba 100644
--- a/ecdsa/resharing/round_1_old_step_1.go
+++ b/ecdsa/resharing/round_1_old_step_1.go
@@ -9,17 +9,18 @@ package resharing
 import (
 	"errors"
 	"fmt"
-
-	"github.com/binance-chain/tss-lib/crypto"
-	"github.com/binance-chain/tss-lib/crypto/commitments"
-	"github.com/binance-chain/tss-lib/crypto/vss"
-	"github.com/binance-chain/tss-lib/ecdsa/keygen"
-	"github.com/binance-chain/tss-lib/ecdsa/signing"
-	"github.com/binance-chain/tss-lib/tss"
+	"math/big"
+
+	"github.com/bnb-chain/tss-lib/v2/crypto"
+	"github.com/bnb-chain/tss-lib/v2/crypto/commitments"
+	"github.com/bnb-chain/tss-lib/v2/crypto/vss"
+	"github.com/bnb-chain/tss-lib/v2/ecdsa/keygen"
+	"github.com/bnb-chain/tss-lib/v2/ecdsa/signing"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 // round 1 represents round 1 of the keygen part of the GG18 ECDSA TSS spec (Gennaro, Goldfeder; 2018)
-func newRound1(params *tss.ReSharingParameters, input, save *keygen.LocalPartySaveData, temp *localTempData, out chan<- tss.Message, end chan<- keygen.LocalPartySaveData) tss.Round {
+func newRound1(params *tss.ReSharingParameters, input, save *keygen.LocalPartySaveData, temp *localTempData, out chan<- tss.Message, end chan<- *keygen.LocalPartySaveData) tss.Round {
 	return &round1{
 		&base{params, temp, input, save, out, end, make([]bool, len(params.OldParties().IDs())), make([]bool, len(params.NewParties().IDs())), false, 1}}
 }
@@ -38,6 +39,12 @@ func (round *round1) Start() *tss.Error {
 	}
 	round.allOldOK()
 
+	round.temp.ssidNonce = new(big.Int).SetUint64(uint64(0))
+	ssid, err := round.getSSID()
+	if err != nil {
+		return round.WrapError(err)
+	}
+	round.temp.ssid = ssid
 	Pi := round.PartyID()
 	i := Pi.Index
 
@@ -47,10 +54,10 @@ func (round *round1) Start() *tss.Error {
 		return round.WrapError(fmt.Errorf("t+1=%d is not satisfied by the key count of %d", round.Threshold()+1, len(ks)), round.PartyID())
 	}
 	newKs := round.NewParties().IDs().Keys()
-	wi, _ := signing.PrepareForSigning(i, len(round.OldParties().IDs()), xi, ks, bigXj)
+	wi, _ := signing.PrepareForSigning(round.Params().EC(), i, len(round.OldParties().IDs()), xi, ks, bigXj)
 
 	// 2.
-	vi, shares, err := vss.Create(round.NewThreshold(), wi, newKs)
+	vi, shares, err := vss.Create(round.Params().EC(), round.NewThreshold(), wi, newKs)
 	if err != nil {
 		return round.WrapError(err, round.PartyID())
 	}
@@ -69,7 +76,7 @@ func (round *round1) Start() *tss.Error {
 	// 5. "broadcast" C_i to members of the NEW committee
 	r1msg := NewDGRound1Message(
 		round.NewParties().IDs().Exclude(round.PartyID()), round.PartyID(),
-		round.input.ECDSAPub, vCmt.C)
+		round.input.ECDSAPub, vCmt.C, ssid)
 	round.temp.dgRound1Messages[i] = r1msg
 	round.out <- r1msg
 
@@ -90,18 +97,24 @@ func (round *round1) Update() (bool, *tss.Error) {
 		return true, nil
 	}
 	// accept messages from old -> new committee
+	ret := true
 	for j, msg := range round.temp.dgRound1Messages {
 		if round.oldOK[j] {
 			continue
 		}
 		if msg == nil || !round.CanAccept(msg) {
-			return false, nil
+			ret = false
+			continue
 		}
 		round.oldOK[j] = true
 
 		// save the ecdsa pub received from the old committee
+		if round.temp.dgRound1Messages[0] == nil {
+			ret = false
+			continue
+		}
 		r1msg := round.temp.dgRound1Messages[0].Content().(*DGRound1Message)
-		candidate, err := r1msg.UnmarshalECDSAPub()
+		candidate, err := r1msg.UnmarshalECDSAPub(round.Params().EC())
 		if err != nil {
 			return false, round.WrapError(errors.New("unable to unmarshal the ecdsa pub key"), msg.GetFrom())
 		}
@@ -112,7 +125,7 @@ func (round *round1) Update() (bool, *tss.Error) {
 		}
 		round.save.ECDSAPub = candidate
 	}
-	return true, nil
+	return ret, nil
 }
 
 func (round *round1) NextRound() tss.Round {
diff --git a/ecdsa/resharing/round_2_new_step_1.go b/ecdsa/resharing/round_2_new_step_1.go
index 3f1337be..3543e047 100644
--- a/ecdsa/resharing/round_2_new_step_1.go
+++ b/ecdsa/resharing/round_2_new_step_1.go
@@ -7,11 +7,19 @@
 package resharing
 
 import (
+	"bytes"
 	"errors"
+	"math/big"
 
-	"github.com/binance-chain/tss-lib/crypto/dlnproof"
-	"github.com/binance-chain/tss-lib/ecdsa/keygen"
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/crypto/modproof"
+
+	"github.com/bnb-chain/tss-lib/v2/crypto/dlnproof"
+	"github.com/bnb-chain/tss-lib/v2/ecdsa/keygen"
+	"github.com/bnb-chain/tss-lib/v2/tss"
+)
+
+var (
+	zero = big.NewInt(0)
 )
 
 func (round *round2) Start() *tss.Error {
@@ -30,6 +38,21 @@ func (round *round2) Start() *tss.Error {
 	Pi := round.PartyID()
 	i := Pi.Index
 
+	// check consistency of SSID
+	r1msg := round.temp.dgRound1Messages[0].Content().(*DGRound1Message)
+	SSID := r1msg.UnmarshalSSID()
+	for j, Pj := range round.OldParties().IDs() {
+		if j == 0 || j == i {
+			continue
+		}
+		r1msg := round.temp.dgRound1Messages[j].Content().(*DGRound1Message)
+		SSIDj := r1msg.UnmarshalSSID()
+		if !bytes.Equal(SSID, SSIDj) {
+			return round.WrapError(errors.New("ssid mismatch"), Pj)
+		}
+	}
+	round.temp.ssid = SSID
+
 	// 2. "broadcast" "ACK" members of the OLD committee
 	r2msg1 := NewDGRound2Message2(
 		round.OldParties().IDs().Exclude(round.PartyID()), round.PartyID())
@@ -49,7 +72,7 @@ func (round *round2) Start() *tss.Error {
 		preParams = &round.save.LocalPreParams
 	} else {
 		var err error
-		preParams, err = keygen.GeneratePreParams(round.SafePrimeGenTimeout())
+		preParams, err = keygen.GeneratePreParams(round.SafePrimeGenTimeout(), round.Concurrency())
 		if err != nil {
 			return round.WrapError(errors.New("pre-params generation failed"), Pi)
 		}
@@ -70,10 +93,18 @@ func (round *round2) Start() *tss.Error {
 	dlnProof1 := dlnproof.NewDLNProof(h1i, h2i, alpha, p, q, NTildei)
 	dlnProof2 := dlnproof.NewDLNProof(h2i, h1i, beta, p, q, NTildei)
 
-	paillierPf := preParams.PaillierSK.Proof(Pi.KeyInt(), round.save.ECDSAPub)
+	modProof := &modproof.ProofMod{W: zero, X: *new([80]*big.Int), A: zero, B: zero, Z: *new([80]*big.Int)}
+	ContextI := append(round.temp.ssid, big.NewInt(int64(i)).Bytes()...)
+	if !round.Parameters.NoProofMod() {
+		var err error
+		modProof, err = modproof.NewProof(ContextI, preParams.PaillierSK.N, preParams.PaillierSK.P, preParams.PaillierSK.Q)
+		if err != nil {
+			return round.WrapError(err, Pi)
+		}
+	}
 	r2msg2, err := NewDGRound2Message1(
 		round.NewParties().IDs().Exclude(round.PartyID()), round.PartyID(),
-		&preParams.PaillierSK.PublicKey, paillierPf, preParams.NTildei, preParams.H1i, preParams.H2i, dlnProof1, dlnProof2)
+		&preParams.PaillierSK.PublicKey, modProof, preParams.NTildei, preParams.H1i, preParams.H2i, dlnProof1, dlnProof2)
 	if err != nil {
 		return round.WrapError(err, Pi)
 	}
@@ -104,6 +135,7 @@ func (round *round2) CanAccept(msg tss.ParsedMessage) bool {
 }
 
 func (round *round2) Update() (bool, *tss.Error) {
+	ret := true
 	if round.ReSharingParams().IsOldCommittee() && round.ReSharingParameters.IsNewCommittee() {
 		// accept messages from new -> old committee
 		for j, msg1 := range round.temp.dgRound2Message2s {
@@ -111,12 +143,14 @@ func (round *round2) Update() (bool, *tss.Error) {
 				continue
 			}
 			if msg1 == nil || !round.CanAccept(msg1) {
-				return false, nil
+				ret = false
+				continue
 			}
 			// accept message from new -> committee
 			msg2 := round.temp.dgRound2Message1s[j]
 			if msg2 == nil || !round.CanAccept(msg2) {
-				return false, nil
+				ret = false
+				continue
 			}
 			round.newOK[j] = true
 		}
@@ -127,7 +161,8 @@ func (round *round2) Update() (bool, *tss.Error) {
 				continue
 			}
 			if msg == nil || !round.CanAccept(msg) {
-				return false, nil
+				ret = false
+				continue
 			}
 			round.newOK[j] = true
 		}
@@ -138,14 +173,15 @@ func (round *round2) Update() (bool, *tss.Error) {
 				continue
 			}
 			if msg == nil || !round.CanAccept(msg) {
-				return false, nil
+				ret = false
+				continue
 			}
 			round.newOK[j] = true
 		}
 	} else {
 		return false, round.WrapError(errors.New("this party is not in the old or the new committee"), round.PartyID())
 	}
-	return true, nil
+	return ret, nil
 }
 
 func (round *round2) NextRound() tss.Round {
diff --git a/ecdsa/resharing/round_3_old_step_2.go b/ecdsa/resharing/round_3_old_step_2.go
index 10c379d1..f222290e 100644
--- a/ecdsa/resharing/round_3_old_step_2.go
+++ b/ecdsa/resharing/round_3_old_step_2.go
@@ -9,7 +9,7 @@ package resharing
 import (
 	"errors"
 
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 func (round *round3) Start() *tss.Error {
diff --git a/ecdsa/resharing/round_4_new_step_2.go b/ecdsa/resharing/round_4_new_step_2.go
index f8247260..f3115c59 100644
--- a/ecdsa/resharing/round_4_new_step_2.go
+++ b/ecdsa/resharing/round_4_new_step_2.go
@@ -12,13 +12,16 @@ import (
 	"math/big"
 	"sync"
 
+	"github.com/bnb-chain/tss-lib/v2/crypto/facproof"
+
 	errors2 "github.com/pkg/errors"
 
-	"github.com/binance-chain/tss-lib/common"
-	"github.com/binance-chain/tss-lib/crypto"
-	"github.com/binance-chain/tss-lib/crypto/commitments"
-	"github.com/binance-chain/tss-lib/crypto/vss"
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/common"
+	"github.com/bnb-chain/tss-lib/v2/crypto"
+	"github.com/bnb-chain/tss-lib/v2/crypto/commitments"
+	"github.com/bnb-chain/tss-lib/v2/crypto/vss"
+	"github.com/bnb-chain/tss-lib/v2/ecdsa/keygen"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 func (round *round4) Start() *tss.Error {
@@ -36,8 +39,16 @@ func (round *round4) Start() *tss.Error {
 		return nil
 	}
 
+	common.Logger.Debugf(
+		"%s Setting up DLN verification with concurrency level of %d",
+		round.PartyID(),
+		round.Concurrency(),
+	)
+	dlnVerifier := keygen.NewDlnProofVerifier(round.Concurrency())
+
 	Pi := round.PartyID()
 	i := Pi.Index
+	round.newOK[i] = true
 
 	// 1-3. verify paillier & dln proofs, store message pieces, ensure uniqueness of h1j, h2j
 	h1H2Map := make(map[string]struct{}, len(round.temp.dgRound2Message1s)*2)
@@ -65,26 +76,37 @@ func (round *round4) Start() *tss.Error {
 		h1H2Map[h1JHex], h1H2Map[h2JHex] = struct{}{}, struct{}{}
 		wg.Add(3)
 		go func(j int, msg tss.ParsedMessage, r2msg1 *DGRound2Message1) {
-			if ok, err := r2msg1.UnmarshalPaillierProof().Verify(paiPK.N, msg.GetFrom().KeyInt(), round.save.ECDSAPub); err != nil || !ok {
+			defer wg.Done()
+			modProof, err := r2msg1.UnmarshalModProof()
+			if err != nil {
+				if !round.Parameters.NoProofMod() {
+					paiProofCulprits[j] = msg.GetFrom()
+				}
+				common.Logger.Warningf("modProof verify failed for party %s", msg.GetFrom(), err)
+				return
+			}
+			ContextJ := common.AppendBigIntToBytesSlice(round.temp.ssid, big.NewInt(int64(j)))
+			if ok := modProof.Verify(ContextJ, paiPK.N); !ok {
 				paiProofCulprits[j] = msg.GetFrom()
-				common.Logger.Warningf("paillier verify failed for party %s", msg.GetFrom(), err)
+				common.Logger.Warningf("modProof verify failed for party %s", msg.GetFrom(), err)
 			}
-			wg.Done()
 		}(j, msg, r2msg1)
-		go func(j int, msg tss.ParsedMessage, r2msg1 *DGRound2Message1, H1j, H2j, NTildej *big.Int) {
-			if dlnProof1, err := r2msg1.UnmarshalDLNProof1(); err != nil || !dlnProof1.Verify(H1j, H2j, NTildej) {
-				dlnProof1FailCulprits[j] = msg.GetFrom()
-				common.Logger.Warningf("dln proof 1 verify failed for party %s", msg.GetFrom(), err)
+		_j := j
+		_msg := msg
+		dlnVerifier.VerifyDLNProof1(r2msg1, H1j, H2j, NTildej, func(isValid bool) {
+			if !isValid {
+				dlnProof1FailCulprits[_j] = _msg.GetFrom()
+				common.Logger.Warningf("dln proof 1 verify failed for party %s", _msg.GetFrom())
 			}
 			wg.Done()
-		}(j, msg, r2msg1, H1j, H2j, NTildej)
-		go func(j int, msg tss.ParsedMessage, r2msg1 *DGRound2Message1, H1j, H2j, NTildej *big.Int) {
-			if dlnProof2, err := r2msg1.UnmarshalDLNProof2(); err != nil || !dlnProof2.Verify(H2j, H1j, NTildej) {
-				dlnProof2FailCulprits[j] = msg.GetFrom()
-				common.Logger.Warningf("dln proof 2 verify failed for party %s", msg.GetFrom(), err)
+		})
+		dlnVerifier.VerifyDLNProof2(r2msg1, H2j, H1j, NTildej, func(isValid bool) {
+			if !isValid {
+				dlnProof2FailCulprits[_j] = _msg.GetFrom()
+				common.Logger.Warningf("dln proof 2 verify failed for party %s", _msg.GetFrom())
 			}
 			wg.Done()
-		}(j, msg, r2msg1, H1j, H2j, NTildej)
+		})
 	}
 	wg.Wait()
 	for _, culprit := range append(append(paiProofCulprits, dlnProof1FailCulprits...), dlnProof2FailCulprits...) {
@@ -107,7 +129,7 @@ func (round *round4) Start() *tss.Error {
 	newXi := big.NewInt(0)
 
 	// 5-9.
-	modQ := common.ModInt(tss.EC().Params().N)
+	modQ := common.ModInt(round.Params().EC().Params().N)
 	vjc := make([][]*crypto.ECPoint, len(round.OldParties().IDs()))
 	for j := 0; j <= len(vjc)-1; j++ { // P1..P_t+1. Ps are indexed from 0 here
 		// 6-7.
@@ -123,7 +145,7 @@ func (round *round4) Start() *tss.Error {
 			// TODO collect culprits and return a list of them as per convention
 			return round.WrapError(errors.New("de-commitment of v_j0..v_jt failed"), round.Parties().IDs()[j])
 		}
-		vj, err := crypto.UnFlattenECPoints(tss.EC(), flatVs)
+		vj, err := crypto.UnFlattenECPoints(round.Params().EC(), flatVs)
 		if err != nil {
 			return round.WrapError(err, round.Parties().IDs()[j])
 		}
@@ -136,7 +158,7 @@ func (round *round4) Start() *tss.Error {
 			ID:        round.PartyID().KeyInt(),
 			Share:     new(big.Int).SetBytes(r3msg1.Share),
 		}
-		if ok := sharej.Verify(round.NewThreshold(), vj); !ok {
+		if ok := sharej.Verify(round.Params().EC(), round.NewThreshold(), vj); !ok {
 			// TODO collect culprits and return a list of them as per convention
 			return round.WrapError(errors.New("share from old committee did not pass Verify()"), round.Parties().IDs()[j])
 		}
@@ -190,16 +212,38 @@ func (round *round4) Start() *tss.Error {
 	round.temp.newKs = newKs
 	round.temp.newBigXjs = newBigXjs
 
+	// Send facProof to new parties
+	for j, Pj := range round.NewParties().IDs() {
+		if j == i {
+			continue
+		}
+		ContextJ := common.AppendBigIntToBytesSlice(round.temp.ssid, big.NewInt(int64(j)))
+		facProof := &facproof.ProofFac{P: zero, Q: zero, A: zero, B: zero, T: zero, Sigma: zero,
+			Z1: zero, Z2: zero, W1: zero, W2: zero, V: zero}
+		if !round.Parameters.NoProofFac() {
+			facProof, err = facproof.NewProof(ContextJ, round.EC(), round.save.PaillierSK.N, round.save.NTildej[j],
+				round.save.H1j[j], round.save.H2j[j], round.save.PaillierSK.P, round.save.PaillierSK.Q)
+			if err != nil {
+				return round.WrapError(err, Pi)
+			}
+		}
+		r4msg1 := NewDGRound4Message1(Pj, Pi, facProof)
+		round.out <- r4msg1
+	}
+
 	// Send an "ACK" message to both committees to signal that we're ready to save our data
-	r4msg := NewDGRound4Message(round.OldAndNewParties(), Pi)
-	round.temp.dgRound4Messages[i] = r4msg
-	round.out <- r4msg
+	r4msg2 := NewDGRound4Message2(round.OldAndNewParties(), Pi)
+	round.temp.dgRound4Message2s[i] = r4msg2
+	round.out <- r4msg2
 
 	return nil
 }
 
 func (round *round4) CanAccept(msg tss.ParsedMessage) bool {
-	if _, ok := msg.Content().(*DGRound4Message); ok {
+	if _, ok := msg.Content().(*DGRound4Message1); ok {
+		return !msg.IsBroadcast()
+	}
+	if _, ok := msg.Content().(*DGRound4Message2); ok {
 		return msg.IsBroadcast()
 	}
 	return false
@@ -207,13 +251,19 @@ func (round *round4) CanAccept(msg tss.ParsedMessage) bool {
 
 func (round *round4) Update() (bool, *tss.Error) {
 	// accept messages from new -> old&new committees
-	for j, msg := range round.temp.dgRound4Messages {
+	for j, msg2 := range round.temp.dgRound4Message2s {
 		if round.newOK[j] {
 			continue
 		}
-		if msg == nil || !round.CanAccept(msg) {
+		if msg2 == nil || !round.CanAccept(msg2) {
 			return false, nil
 		}
+		if round.ReSharingParams().IsNewCommittee() {
+			msg1 := round.temp.dgRound4Message1s[j]
+			if msg1 == nil || !round.CanAccept(msg1) {
+				return false, nil
+			}
+		}
 		round.newOK[j] = true
 	}
 	return true, nil
diff --git a/ecdsa/resharing/round_5_new_step_3.go b/ecdsa/resharing/round_5_new_step_3.go
index ffe9e5d2..9f46ed20 100644
--- a/ecdsa/resharing/round_5_new_step_3.go
+++ b/ecdsa/resharing/round_5_new_step_3.go
@@ -8,8 +8,10 @@ package resharing
 
 import (
 	"errors"
+	"math/big"
 
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/common"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 func (round *round5) Start() *tss.Error {
@@ -28,6 +30,7 @@ func (round *round5) Start() *tss.Error {
 	if round.IsNewCommittee() {
 		// 21.
 		// for this P: SAVE data
+		ContextI := append(round.temp.ssid, big.NewInt(int64(i)).Bytes()...)
 		round.save.BigXj = round.temp.newBigXjs
 		round.save.ShareID = round.PartyID().KeyInt()
 		round.save.Xi = round.temp.newXi
@@ -41,11 +44,32 @@ func (round *round5) Start() *tss.Error {
 			r2msg1 := msg.Content().(*DGRound2Message1)
 			round.save.PaillierPKs[j] = r2msg1.UnmarshalPaillierPK()
 		}
+		for j, msg := range round.temp.dgRound4Message1s {
+			if j == i {
+				continue
+			}
+			r4msg1 := msg.Content().(*DGRound4Message1)
+			proof, err := r4msg1.UnmarshalFacProof()
+			if err != nil && round.Parameters.NoProofFac() {
+				common.Logger.Warningf("facProof verify failed for party %s", msg.GetFrom(), err)
+			} else {
+				if err != nil {
+					common.Logger.Warningf("facProof verify failed for party %s", msg.GetFrom(), err)
+					return round.WrapError(err, round.NewParties().IDs()[j])
+				}
+				if ok := proof.Verify(ContextI, round.EC(), round.save.PaillierPKs[j].N, round.save.NTildei,
+					round.save.H1i, round.save.H2i); !ok {
+					common.Logger.Warningf("facProof verify failed for party %s", msg.GetFrom(), err)
+					return round.WrapError(err, round.NewParties().IDs()[j])
+				}
+			}
+
+		}
 	} else if round.IsOldCommittee() {
 		round.input.Xi.SetInt64(0)
 	}
 
-	round.end <- *round.save
+	round.end <- round.save
 	return nil
 }
 
diff --git a/ecdsa/resharing/rounds.go b/ecdsa/resharing/rounds.go
index d23b50bd..a76b1998 100644
--- a/ecdsa/resharing/rounds.go
+++ b/ecdsa/resharing/rounds.go
@@ -7,8 +7,13 @@
 package resharing
 
 import (
-	"github.com/binance-chain/tss-lib/ecdsa/keygen"
-	"github.com/binance-chain/tss-lib/tss"
+	"errors"
+	"math/big"
+
+	"github.com/bnb-chain/tss-lib/v2/common"
+	"github.com/bnb-chain/tss-lib/v2/crypto"
+	"github.com/bnb-chain/tss-lib/v2/ecdsa/keygen"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 const (
@@ -21,7 +26,7 @@ type (
 		temp        *localTempData
 		input, save *keygen.LocalPartySaveData
 		out         chan<- tss.Message
-		end         chan<- keygen.LocalPartySaveData
+		end         chan<- *keygen.LocalPartySaveData
 		oldOK,      // old committee "ok" tracker
 		newOK []bool // `ok` tracks parties which have been verified by Update(); this one is for the new committee
 		started bool
@@ -133,3 +138,22 @@ func (round *base) allNewOK() {
 		round.newOK[j] = true
 	}
 }
+
+// get ssid from local params
+func (round *base) getSSID() ([]byte, error) {
+	ssidList := []*big.Int{round.EC().Params().P, round.EC().Params().N, round.EC().Params().B, round.EC().Params().Gx, round.EC().Params().Gy} // ec curve
+	ssidList = append(ssidList, round.Parties().IDs().Keys()...)                                                                                // parties
+	BigXjList, err := crypto.FlattenECPoints(round.input.BigXj)
+	if err != nil {
+		return nil, round.WrapError(errors.New("read BigXj failed"), round.PartyID())
+	}
+	ssidList = append(ssidList, BigXjList...)                    // BigXj
+	ssidList = append(ssidList, round.input.NTildej...)          // NTilde
+	ssidList = append(ssidList, round.input.H1j...)              // h1
+	ssidList = append(ssidList, round.input.H2j...)              // h2
+	ssidList = append(ssidList, big.NewInt(int64(round.number))) // round number
+	ssidList = append(ssidList, round.temp.ssidNonce)
+	ssid := common.SHA512_256i(ssidList...).Bytes()
+
+	return ssid, nil
+}
diff --git a/ecdsa/signing/ecdsa-signing.pb.go b/ecdsa/signing/ecdsa-signing.pb.go
index 54eb0c78..4b8a55d2 100644
--- a/ecdsa/signing/ecdsa-signing.pb.go
+++ b/ecdsa/signing/ecdsa-signing.pb.go
@@ -1,70 +1,84 @@
+// Copyright © 2019 Binance
+//
+// This file is part of Binance. The full Binance copyright notice, including
+// terms governing use, modification, and redistribution, is contained in the
+// file LICENSE at the root of the source code distribution tree.
+
 // Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.27.1
+// 	protoc        v3.14.0
 // source: protob/ecdsa-signing.proto
 
 package signing
 
 import (
-	fmt "fmt"
-	proto "github.com/golang/protobuf/proto"
-	math "math"
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
 )
 
-// Reference imports to suppress errors if they are not otherwise used.
-var _ = proto.Marshal
-var _ = fmt.Errorf
-var _ = math.Inf
-
-// This is a compile-time assertion to ensure that this generated file
-// is compatible with the proto package it is being compiled against.
-// A compilation error at this line likely means your copy of the
-// proto package needs to be updated.
-const _ = proto.ProtoPackageIsVersion3 // please upgrade the proto package
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
 
 //
 // Represents a P2P message sent to each party during Round 1 of the ECDSA TSS signing protocol.
 type SignRound1Message1 struct {
-	C                    []byte   `protobuf:"bytes,1,opt,name=c,proto3" json:"c,omitempty"`
-	RangeProofAlice      [][]byte `protobuf:"bytes,2,rep,name=range_proof_alice,json=rangeProofAlice,proto3" json:"range_proof_alice,omitempty"`
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
-}
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
 
-func (m *SignRound1Message1) Reset()         { *m = SignRound1Message1{} }
-func (m *SignRound1Message1) String() string { return proto.CompactTextString(m) }
-func (*SignRound1Message1) ProtoMessage()    {}
-func (*SignRound1Message1) Descriptor() ([]byte, []int) {
-	return fileDescriptor_5f861bfc687bec19, []int{0}
+	C               []byte   `protobuf:"bytes,1,opt,name=c,proto3" json:"c,omitempty"`
+	RangeProofAlice [][]byte `protobuf:"bytes,2,rep,name=range_proof_alice,json=rangeProofAlice,proto3" json:"range_proof_alice,omitempty"`
 }
 
-func (m *SignRound1Message1) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_SignRound1Message1.Unmarshal(m, b)
-}
-func (m *SignRound1Message1) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_SignRound1Message1.Marshal(b, m, deterministic)
-}
-func (m *SignRound1Message1) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_SignRound1Message1.Merge(m, src)
+func (x *SignRound1Message1) Reset() {
+	*x = SignRound1Message1{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_protob_ecdsa_signing_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
 }
-func (m *SignRound1Message1) XXX_Size() int {
-	return xxx_messageInfo_SignRound1Message1.Size(m)
+
+func (x *SignRound1Message1) String() string {
+	return protoimpl.X.MessageStringOf(x)
 }
-func (m *SignRound1Message1) XXX_DiscardUnknown() {
-	xxx_messageInfo_SignRound1Message1.DiscardUnknown(m)
+
+func (*SignRound1Message1) ProtoMessage() {}
+
+func (x *SignRound1Message1) ProtoReflect() protoreflect.Message {
+	mi := &file_protob_ecdsa_signing_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
 }
 
-var xxx_messageInfo_SignRound1Message1 proto.InternalMessageInfo
+// Deprecated: Use SignRound1Message1.ProtoReflect.Descriptor instead.
+func (*SignRound1Message1) Descriptor() ([]byte, []int) {
+	return file_protob_ecdsa_signing_proto_rawDescGZIP(), []int{0}
+}
 
-func (m *SignRound1Message1) GetC() []byte {
-	if m != nil {
-		return m.C
+func (x *SignRound1Message1) GetC() []byte {
+	if x != nil {
+		return x.C
 	}
 	return nil
 }
 
-func (m *SignRound1Message1) GetRangeProofAlice() [][]byte {
-	if m != nil {
-		return m.RangeProofAlice
+func (x *SignRound1Message1) GetRangeProofAlice() [][]byte {
+	if x != nil {
+		return x.RangeProofAlice
 	}
 	return nil
 }
@@ -72,40 +86,48 @@ func (m *SignRound1Message1) GetRangeProofAlice() [][]byte {
 //
 // Represents a BROADCAST message sent to all parties during Round 1 of the ECDSA TSS signing protocol.
 type SignRound1Message2 struct {
-	Commitment           []byte   `protobuf:"bytes,1,opt,name=commitment,proto3" json:"commitment,omitempty"`
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
-}
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
 
-func (m *SignRound1Message2) Reset()         { *m = SignRound1Message2{} }
-func (m *SignRound1Message2) String() string { return proto.CompactTextString(m) }
-func (*SignRound1Message2) ProtoMessage()    {}
-func (*SignRound1Message2) Descriptor() ([]byte, []int) {
-	return fileDescriptor_5f861bfc687bec19, []int{1}
+	Commitment []byte `protobuf:"bytes,1,opt,name=commitment,proto3" json:"commitment,omitempty"`
 }
 
-func (m *SignRound1Message2) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_SignRound1Message2.Unmarshal(m, b)
-}
-func (m *SignRound1Message2) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_SignRound1Message2.Marshal(b, m, deterministic)
-}
-func (m *SignRound1Message2) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_SignRound1Message2.Merge(m, src)
+func (x *SignRound1Message2) Reset() {
+	*x = SignRound1Message2{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_protob_ecdsa_signing_proto_msgTypes[1]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
 }
-func (m *SignRound1Message2) XXX_Size() int {
-	return xxx_messageInfo_SignRound1Message2.Size(m)
+
+func (x *SignRound1Message2) String() string {
+	return protoimpl.X.MessageStringOf(x)
 }
-func (m *SignRound1Message2) XXX_DiscardUnknown() {
-	xxx_messageInfo_SignRound1Message2.DiscardUnknown(m)
+
+func (*SignRound1Message2) ProtoMessage() {}
+
+func (x *SignRound1Message2) ProtoReflect() protoreflect.Message {
+	mi := &file_protob_ecdsa_signing_proto_msgTypes[1]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
 }
 
-var xxx_messageInfo_SignRound1Message2 proto.InternalMessageInfo
+// Deprecated: Use SignRound1Message2.ProtoReflect.Descriptor instead.
+func (*SignRound1Message2) Descriptor() ([]byte, []int) {
+	return file_protob_ecdsa_signing_proto_rawDescGZIP(), []int{1}
+}
 
-func (m *SignRound1Message2) GetCommitment() []byte {
-	if m != nil {
-		return m.Commitment
+func (x *SignRound1Message2) GetCommitment() []byte {
+	if x != nil {
+		return x.Commitment
 	}
 	return nil
 }
@@ -113,64 +135,72 @@ func (m *SignRound1Message2) GetCommitment() []byte {
 //
 // Represents a P2P message sent to each party during Round 2 of the ECDSA TSS signing protocol.
 type SignRound2Message struct {
-	C1                   []byte   `protobuf:"bytes,1,opt,name=c1,proto3" json:"c1,omitempty"`
-	C2                   []byte   `protobuf:"bytes,2,opt,name=c2,proto3" json:"c2,omitempty"`
-	ProofBob             [][]byte `protobuf:"bytes,3,rep,name=proof_bob,json=proofBob,proto3" json:"proof_bob,omitempty"`
-	ProofBobWc           [][]byte `protobuf:"bytes,4,rep,name=proof_bob_wc,json=proofBobWc,proto3" json:"proof_bob_wc,omitempty"`
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
-}
-
-func (m *SignRound2Message) Reset()         { *m = SignRound2Message{} }
-func (m *SignRound2Message) String() string { return proto.CompactTextString(m) }
-func (*SignRound2Message) ProtoMessage()    {}
-func (*SignRound2Message) Descriptor() ([]byte, []int) {
-	return fileDescriptor_5f861bfc687bec19, []int{2}
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	C1         []byte   `protobuf:"bytes,1,opt,name=c1,proto3" json:"c1,omitempty"`
+	C2         []byte   `protobuf:"bytes,2,opt,name=c2,proto3" json:"c2,omitempty"`
+	ProofBob   [][]byte `protobuf:"bytes,3,rep,name=proof_bob,json=proofBob,proto3" json:"proof_bob,omitempty"`
+	ProofBobWc [][]byte `protobuf:"bytes,4,rep,name=proof_bob_wc,json=proofBobWc,proto3" json:"proof_bob_wc,omitempty"`
+}
+
+func (x *SignRound2Message) Reset() {
+	*x = SignRound2Message{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_protob_ecdsa_signing_proto_msgTypes[2]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
 }
 
-func (m *SignRound2Message) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_SignRound2Message.Unmarshal(m, b)
-}
-func (m *SignRound2Message) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_SignRound2Message.Marshal(b, m, deterministic)
+func (x *SignRound2Message) String() string {
+	return protoimpl.X.MessageStringOf(x)
 }
-func (m *SignRound2Message) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_SignRound2Message.Merge(m, src)
-}
-func (m *SignRound2Message) XXX_Size() int {
-	return xxx_messageInfo_SignRound2Message.Size(m)
-}
-func (m *SignRound2Message) XXX_DiscardUnknown() {
-	xxx_messageInfo_SignRound2Message.DiscardUnknown(m)
+
+func (*SignRound2Message) ProtoMessage() {}
+
+func (x *SignRound2Message) ProtoReflect() protoreflect.Message {
+	mi := &file_protob_ecdsa_signing_proto_msgTypes[2]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
 }
 
-var xxx_messageInfo_SignRound2Message proto.InternalMessageInfo
+// Deprecated: Use SignRound2Message.ProtoReflect.Descriptor instead.
+func (*SignRound2Message) Descriptor() ([]byte, []int) {
+	return file_protob_ecdsa_signing_proto_rawDescGZIP(), []int{2}
+}
 
-func (m *SignRound2Message) GetC1() []byte {
-	if m != nil {
-		return m.C1
+func (x *SignRound2Message) GetC1() []byte {
+	if x != nil {
+		return x.C1
 	}
 	return nil
 }
 
-func (m *SignRound2Message) GetC2() []byte {
-	if m != nil {
-		return m.C2
+func (x *SignRound2Message) GetC2() []byte {
+	if x != nil {
+		return x.C2
 	}
 	return nil
 }
 
-func (m *SignRound2Message) GetProofBob() [][]byte {
-	if m != nil {
-		return m.ProofBob
+func (x *SignRound2Message) GetProofBob() [][]byte {
+	if x != nil {
+		return x.ProofBob
 	}
 	return nil
 }
 
-func (m *SignRound2Message) GetProofBobWc() [][]byte {
-	if m != nil {
-		return m.ProofBobWc
+func (x *SignRound2Message) GetProofBobWc() [][]byte {
+	if x != nil {
+		return x.ProofBobWc
 	}
 	return nil
 }
@@ -178,40 +208,48 @@ func (m *SignRound2Message) GetProofBobWc() [][]byte {
 //
 // Represents a BROADCAST message sent to all parties during Round 3 of the ECDSA TSS signing protocol.
 type SignRound3Message struct {
-	Theta                []byte   `protobuf:"bytes,1,opt,name=theta,proto3" json:"theta,omitempty"`
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
-}
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
 
-func (m *SignRound3Message) Reset()         { *m = SignRound3Message{} }
-func (m *SignRound3Message) String() string { return proto.CompactTextString(m) }
-func (*SignRound3Message) ProtoMessage()    {}
-func (*SignRound3Message) Descriptor() ([]byte, []int) {
-	return fileDescriptor_5f861bfc687bec19, []int{3}
+	Theta []byte `protobuf:"bytes,1,opt,name=theta,proto3" json:"theta,omitempty"`
 }
 
-func (m *SignRound3Message) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_SignRound3Message.Unmarshal(m, b)
-}
-func (m *SignRound3Message) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_SignRound3Message.Marshal(b, m, deterministic)
-}
-func (m *SignRound3Message) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_SignRound3Message.Merge(m, src)
+func (x *SignRound3Message) Reset() {
+	*x = SignRound3Message{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_protob_ecdsa_signing_proto_msgTypes[3]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
 }
-func (m *SignRound3Message) XXX_Size() int {
-	return xxx_messageInfo_SignRound3Message.Size(m)
+
+func (x *SignRound3Message) String() string {
+	return protoimpl.X.MessageStringOf(x)
 }
-func (m *SignRound3Message) XXX_DiscardUnknown() {
-	xxx_messageInfo_SignRound3Message.DiscardUnknown(m)
+
+func (*SignRound3Message) ProtoMessage() {}
+
+func (x *SignRound3Message) ProtoReflect() protoreflect.Message {
+	mi := &file_protob_ecdsa_signing_proto_msgTypes[3]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
 }
 
-var xxx_messageInfo_SignRound3Message proto.InternalMessageInfo
+// Deprecated: Use SignRound3Message.ProtoReflect.Descriptor instead.
+func (*SignRound3Message) Descriptor() ([]byte, []int) {
+	return file_protob_ecdsa_signing_proto_rawDescGZIP(), []int{3}
+}
 
-func (m *SignRound3Message) GetTheta() []byte {
-	if m != nil {
-		return m.Theta
+func (x *SignRound3Message) GetTheta() []byte {
+	if x != nil {
+		return x.Theta
 	}
 	return nil
 }
@@ -219,64 +257,72 @@ func (m *SignRound3Message) GetTheta() []byte {
 //
 // Represents a BROADCAST message sent to all parties during Round 4 of the ECDSA TSS signing protocol.
 type SignRound4Message struct {
-	DeCommitment         [][]byte `protobuf:"bytes,1,rep,name=de_commitment,json=deCommitment,proto3" json:"de_commitment,omitempty"`
-	ProofAlphaX          []byte   `protobuf:"bytes,2,opt,name=proof_alpha_x,json=proofAlphaX,proto3" json:"proof_alpha_x,omitempty"`
-	ProofAlphaY          []byte   `protobuf:"bytes,3,opt,name=proof_alpha_y,json=proofAlphaY,proto3" json:"proof_alpha_y,omitempty"`
-	ProofT               []byte   `protobuf:"bytes,4,opt,name=proof_t,json=proofT,proto3" json:"proof_t,omitempty"`
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
-}
-
-func (m *SignRound4Message) Reset()         { *m = SignRound4Message{} }
-func (m *SignRound4Message) String() string { return proto.CompactTextString(m) }
-func (*SignRound4Message) ProtoMessage()    {}
-func (*SignRound4Message) Descriptor() ([]byte, []int) {
-	return fileDescriptor_5f861bfc687bec19, []int{4}
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	DeCommitment [][]byte `protobuf:"bytes,1,rep,name=de_commitment,json=deCommitment,proto3" json:"de_commitment,omitempty"`
+	ProofAlphaX  []byte   `protobuf:"bytes,2,opt,name=proof_alpha_x,json=proofAlphaX,proto3" json:"proof_alpha_x,omitempty"`
+	ProofAlphaY  []byte   `protobuf:"bytes,3,opt,name=proof_alpha_y,json=proofAlphaY,proto3" json:"proof_alpha_y,omitempty"`
+	ProofT       []byte   `protobuf:"bytes,4,opt,name=proof_t,json=proofT,proto3" json:"proof_t,omitempty"`
+}
+
+func (x *SignRound4Message) Reset() {
+	*x = SignRound4Message{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_protob_ecdsa_signing_proto_msgTypes[4]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
 }
 
-func (m *SignRound4Message) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_SignRound4Message.Unmarshal(m, b)
-}
-func (m *SignRound4Message) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_SignRound4Message.Marshal(b, m, deterministic)
-}
-func (m *SignRound4Message) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_SignRound4Message.Merge(m, src)
+func (x *SignRound4Message) String() string {
+	return protoimpl.X.MessageStringOf(x)
 }
-func (m *SignRound4Message) XXX_Size() int {
-	return xxx_messageInfo_SignRound4Message.Size(m)
-}
-func (m *SignRound4Message) XXX_DiscardUnknown() {
-	xxx_messageInfo_SignRound4Message.DiscardUnknown(m)
+
+func (*SignRound4Message) ProtoMessage() {}
+
+func (x *SignRound4Message) ProtoReflect() protoreflect.Message {
+	mi := &file_protob_ecdsa_signing_proto_msgTypes[4]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
 }
 
-var xxx_messageInfo_SignRound4Message proto.InternalMessageInfo
+// Deprecated: Use SignRound4Message.ProtoReflect.Descriptor instead.
+func (*SignRound4Message) Descriptor() ([]byte, []int) {
+	return file_protob_ecdsa_signing_proto_rawDescGZIP(), []int{4}
+}
 
-func (m *SignRound4Message) GetDeCommitment() [][]byte {
-	if m != nil {
-		return m.DeCommitment
+func (x *SignRound4Message) GetDeCommitment() [][]byte {
+	if x != nil {
+		return x.DeCommitment
 	}
 	return nil
 }
 
-func (m *SignRound4Message) GetProofAlphaX() []byte {
-	if m != nil {
-		return m.ProofAlphaX
+func (x *SignRound4Message) GetProofAlphaX() []byte {
+	if x != nil {
+		return x.ProofAlphaX
 	}
 	return nil
 }
 
-func (m *SignRound4Message) GetProofAlphaY() []byte {
-	if m != nil {
-		return m.ProofAlphaY
+func (x *SignRound4Message) GetProofAlphaY() []byte {
+	if x != nil {
+		return x.ProofAlphaY
 	}
 	return nil
 }
 
-func (m *SignRound4Message) GetProofT() []byte {
-	if m != nil {
-		return m.ProofT
+func (x *SignRound4Message) GetProofT() []byte {
+	if x != nil {
+		return x.ProofT
 	}
 	return nil
 }
@@ -284,40 +330,48 @@ func (m *SignRound4Message) GetProofT() []byte {
 //
 // Represents a BROADCAST message sent to all parties during Round 5 of the ECDSA TSS signing protocol.
 type SignRound5Message struct {
-	Commitment           []byte   `protobuf:"bytes,1,opt,name=commitment,proto3" json:"commitment,omitempty"`
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
-}
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
 
-func (m *SignRound5Message) Reset()         { *m = SignRound5Message{} }
-func (m *SignRound5Message) String() string { return proto.CompactTextString(m) }
-func (*SignRound5Message) ProtoMessage()    {}
-func (*SignRound5Message) Descriptor() ([]byte, []int) {
-	return fileDescriptor_5f861bfc687bec19, []int{5}
+	Commitment []byte `protobuf:"bytes,1,opt,name=commitment,proto3" json:"commitment,omitempty"`
 }
 
-func (m *SignRound5Message) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_SignRound5Message.Unmarshal(m, b)
-}
-func (m *SignRound5Message) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_SignRound5Message.Marshal(b, m, deterministic)
-}
-func (m *SignRound5Message) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_SignRound5Message.Merge(m, src)
+func (x *SignRound5Message) Reset() {
+	*x = SignRound5Message{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_protob_ecdsa_signing_proto_msgTypes[5]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
 }
-func (m *SignRound5Message) XXX_Size() int {
-	return xxx_messageInfo_SignRound5Message.Size(m)
+
+func (x *SignRound5Message) String() string {
+	return protoimpl.X.MessageStringOf(x)
 }
-func (m *SignRound5Message) XXX_DiscardUnknown() {
-	xxx_messageInfo_SignRound5Message.DiscardUnknown(m)
+
+func (*SignRound5Message) ProtoMessage() {}
+
+func (x *SignRound5Message) ProtoReflect() protoreflect.Message {
+	mi := &file_protob_ecdsa_signing_proto_msgTypes[5]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
 }
 
-var xxx_messageInfo_SignRound5Message proto.InternalMessageInfo
+// Deprecated: Use SignRound5Message.ProtoReflect.Descriptor instead.
+func (*SignRound5Message) Descriptor() ([]byte, []int) {
+	return file_protob_ecdsa_signing_proto_rawDescGZIP(), []int{5}
+}
 
-func (m *SignRound5Message) GetCommitment() []byte {
-	if m != nil {
-		return m.Commitment
+func (x *SignRound5Message) GetCommitment() []byte {
+	if x != nil {
+		return x.Commitment
 	}
 	return nil
 }
@@ -325,96 +379,104 @@ func (m *SignRound5Message) GetCommitment() []byte {
 //
 // Represents a BROADCAST message sent to all parties during Round 6 of the ECDSA TSS signing protocol.
 type SignRound6Message struct {
-	DeCommitment         [][]byte `protobuf:"bytes,1,rep,name=de_commitment,json=deCommitment,proto3" json:"de_commitment,omitempty"`
-	ProofAlphaX          []byte   `protobuf:"bytes,2,opt,name=proof_alpha_x,json=proofAlphaX,proto3" json:"proof_alpha_x,omitempty"`
-	ProofAlphaY          []byte   `protobuf:"bytes,3,opt,name=proof_alpha_y,json=proofAlphaY,proto3" json:"proof_alpha_y,omitempty"`
-	ProofT               []byte   `protobuf:"bytes,4,opt,name=proof_t,json=proofT,proto3" json:"proof_t,omitempty"`
-	VProofAlphaX         []byte   `protobuf:"bytes,5,opt,name=v_proof_alpha_x,json=vProofAlphaX,proto3" json:"v_proof_alpha_x,omitempty"`
-	VProofAlphaY         []byte   `protobuf:"bytes,6,opt,name=v_proof_alpha_y,json=vProofAlphaY,proto3" json:"v_proof_alpha_y,omitempty"`
-	VProofT              []byte   `protobuf:"bytes,7,opt,name=v_proof_t,json=vProofT,proto3" json:"v_proof_t,omitempty"`
-	VProofU              []byte   `protobuf:"bytes,8,opt,name=v_proof_u,json=vProofU,proto3" json:"v_proof_u,omitempty"`
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
-}
-
-func (m *SignRound6Message) Reset()         { *m = SignRound6Message{} }
-func (m *SignRound6Message) String() string { return proto.CompactTextString(m) }
-func (*SignRound6Message) ProtoMessage()    {}
-func (*SignRound6Message) Descriptor() ([]byte, []int) {
-	return fileDescriptor_5f861bfc687bec19, []int{6}
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	DeCommitment [][]byte `protobuf:"bytes,1,rep,name=de_commitment,json=deCommitment,proto3" json:"de_commitment,omitempty"`
+	ProofAlphaX  []byte   `protobuf:"bytes,2,opt,name=proof_alpha_x,json=proofAlphaX,proto3" json:"proof_alpha_x,omitempty"`
+	ProofAlphaY  []byte   `protobuf:"bytes,3,opt,name=proof_alpha_y,json=proofAlphaY,proto3" json:"proof_alpha_y,omitempty"`
+	ProofT       []byte   `protobuf:"bytes,4,opt,name=proof_t,json=proofT,proto3" json:"proof_t,omitempty"`
+	VProofAlphaX []byte   `protobuf:"bytes,5,opt,name=v_proof_alpha_x,json=vProofAlphaX,proto3" json:"v_proof_alpha_x,omitempty"`
+	VProofAlphaY []byte   `protobuf:"bytes,6,opt,name=v_proof_alpha_y,json=vProofAlphaY,proto3" json:"v_proof_alpha_y,omitempty"`
+	VProofT      []byte   `protobuf:"bytes,7,opt,name=v_proof_t,json=vProofT,proto3" json:"v_proof_t,omitempty"`
+	VProofU      []byte   `protobuf:"bytes,8,opt,name=v_proof_u,json=vProofU,proto3" json:"v_proof_u,omitempty"`
+}
+
+func (x *SignRound6Message) Reset() {
+	*x = SignRound6Message{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_protob_ecdsa_signing_proto_msgTypes[6]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
 }
 
-func (m *SignRound6Message) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_SignRound6Message.Unmarshal(m, b)
-}
-func (m *SignRound6Message) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_SignRound6Message.Marshal(b, m, deterministic)
-}
-func (m *SignRound6Message) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_SignRound6Message.Merge(m, src)
-}
-func (m *SignRound6Message) XXX_Size() int {
-	return xxx_messageInfo_SignRound6Message.Size(m)
+func (x *SignRound6Message) String() string {
+	return protoimpl.X.MessageStringOf(x)
 }
-func (m *SignRound6Message) XXX_DiscardUnknown() {
-	xxx_messageInfo_SignRound6Message.DiscardUnknown(m)
+
+func (*SignRound6Message) ProtoMessage() {}
+
+func (x *SignRound6Message) ProtoReflect() protoreflect.Message {
+	mi := &file_protob_ecdsa_signing_proto_msgTypes[6]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
 }
 
-var xxx_messageInfo_SignRound6Message proto.InternalMessageInfo
+// Deprecated: Use SignRound6Message.ProtoReflect.Descriptor instead.
+func (*SignRound6Message) Descriptor() ([]byte, []int) {
+	return file_protob_ecdsa_signing_proto_rawDescGZIP(), []int{6}
+}
 
-func (m *SignRound6Message) GetDeCommitment() [][]byte {
-	if m != nil {
-		return m.DeCommitment
+func (x *SignRound6Message) GetDeCommitment() [][]byte {
+	if x != nil {
+		return x.DeCommitment
 	}
 	return nil
 }
 
-func (m *SignRound6Message) GetProofAlphaX() []byte {
-	if m != nil {
-		return m.ProofAlphaX
+func (x *SignRound6Message) GetProofAlphaX() []byte {
+	if x != nil {
+		return x.ProofAlphaX
 	}
 	return nil
 }
 
-func (m *SignRound6Message) GetProofAlphaY() []byte {
-	if m != nil {
-		return m.ProofAlphaY
+func (x *SignRound6Message) GetProofAlphaY() []byte {
+	if x != nil {
+		return x.ProofAlphaY
 	}
 	return nil
 }
 
-func (m *SignRound6Message) GetProofT() []byte {
-	if m != nil {
-		return m.ProofT
+func (x *SignRound6Message) GetProofT() []byte {
+	if x != nil {
+		return x.ProofT
 	}
 	return nil
 }
 
-func (m *SignRound6Message) GetVProofAlphaX() []byte {
-	if m != nil {
-		return m.VProofAlphaX
+func (x *SignRound6Message) GetVProofAlphaX() []byte {
+	if x != nil {
+		return x.VProofAlphaX
 	}
 	return nil
 }
 
-func (m *SignRound6Message) GetVProofAlphaY() []byte {
-	if m != nil {
-		return m.VProofAlphaY
+func (x *SignRound6Message) GetVProofAlphaY() []byte {
+	if x != nil {
+		return x.VProofAlphaY
 	}
 	return nil
 }
 
-func (m *SignRound6Message) GetVProofT() []byte {
-	if m != nil {
-		return m.VProofT
+func (x *SignRound6Message) GetVProofT() []byte {
+	if x != nil {
+		return x.VProofT
 	}
 	return nil
 }
 
-func (m *SignRound6Message) GetVProofU() []byte {
-	if m != nil {
-		return m.VProofU
+func (x *SignRound6Message) GetVProofU() []byte {
+	if x != nil {
+		return x.VProofU
 	}
 	return nil
 }
@@ -422,40 +484,48 @@ func (m *SignRound6Message) GetVProofU() []byte {
 //
 // Represents a BROADCAST message sent to all parties during Round 7 of the ECDSA TSS signing protocol.
 type SignRound7Message struct {
-	Commitment           []byte   `protobuf:"bytes,1,opt,name=commitment,proto3" json:"commitment,omitempty"`
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
-}
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
 
-func (m *SignRound7Message) Reset()         { *m = SignRound7Message{} }
-func (m *SignRound7Message) String() string { return proto.CompactTextString(m) }
-func (*SignRound7Message) ProtoMessage()    {}
-func (*SignRound7Message) Descriptor() ([]byte, []int) {
-	return fileDescriptor_5f861bfc687bec19, []int{7}
+	Commitment []byte `protobuf:"bytes,1,opt,name=commitment,proto3" json:"commitment,omitempty"`
 }
 
-func (m *SignRound7Message) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_SignRound7Message.Unmarshal(m, b)
-}
-func (m *SignRound7Message) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_SignRound7Message.Marshal(b, m, deterministic)
-}
-func (m *SignRound7Message) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_SignRound7Message.Merge(m, src)
+func (x *SignRound7Message) Reset() {
+	*x = SignRound7Message{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_protob_ecdsa_signing_proto_msgTypes[7]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
 }
-func (m *SignRound7Message) XXX_Size() int {
-	return xxx_messageInfo_SignRound7Message.Size(m)
+
+func (x *SignRound7Message) String() string {
+	return protoimpl.X.MessageStringOf(x)
 }
-func (m *SignRound7Message) XXX_DiscardUnknown() {
-	xxx_messageInfo_SignRound7Message.DiscardUnknown(m)
+
+func (*SignRound7Message) ProtoMessage() {}
+
+func (x *SignRound7Message) ProtoReflect() protoreflect.Message {
+	mi := &file_protob_ecdsa_signing_proto_msgTypes[7]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
 }
 
-var xxx_messageInfo_SignRound7Message proto.InternalMessageInfo
+// Deprecated: Use SignRound7Message.ProtoReflect.Descriptor instead.
+func (*SignRound7Message) Descriptor() ([]byte, []int) {
+	return file_protob_ecdsa_signing_proto_rawDescGZIP(), []int{7}
+}
 
-func (m *SignRound7Message) GetCommitment() []byte {
-	if m != nil {
-		return m.Commitment
+func (x *SignRound7Message) GetCommitment() []byte {
+	if x != nil {
+		return x.Commitment
 	}
 	return nil
 }
@@ -463,40 +533,48 @@ func (m *SignRound7Message) GetCommitment() []byte {
 //
 // Represents a BROADCAST message sent to all parties during Round 8 of the ECDSA TSS signing protocol.
 type SignRound8Message struct {
-	DeCommitment         [][]byte `protobuf:"bytes,1,rep,name=de_commitment,json=deCommitment,proto3" json:"de_commitment,omitempty"`
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
-}
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
 
-func (m *SignRound8Message) Reset()         { *m = SignRound8Message{} }
-func (m *SignRound8Message) String() string { return proto.CompactTextString(m) }
-func (*SignRound8Message) ProtoMessage()    {}
-func (*SignRound8Message) Descriptor() ([]byte, []int) {
-	return fileDescriptor_5f861bfc687bec19, []int{8}
+	DeCommitment [][]byte `protobuf:"bytes,1,rep,name=de_commitment,json=deCommitment,proto3" json:"de_commitment,omitempty"`
 }
 
-func (m *SignRound8Message) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_SignRound8Message.Unmarshal(m, b)
-}
-func (m *SignRound8Message) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_SignRound8Message.Marshal(b, m, deterministic)
-}
-func (m *SignRound8Message) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_SignRound8Message.Merge(m, src)
+func (x *SignRound8Message) Reset() {
+	*x = SignRound8Message{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_protob_ecdsa_signing_proto_msgTypes[8]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
 }
-func (m *SignRound8Message) XXX_Size() int {
-	return xxx_messageInfo_SignRound8Message.Size(m)
+
+func (x *SignRound8Message) String() string {
+	return protoimpl.X.MessageStringOf(x)
 }
-func (m *SignRound8Message) XXX_DiscardUnknown() {
-	xxx_messageInfo_SignRound8Message.DiscardUnknown(m)
+
+func (*SignRound8Message) ProtoMessage() {}
+
+func (x *SignRound8Message) ProtoReflect() protoreflect.Message {
+	mi := &file_protob_ecdsa_signing_proto_msgTypes[8]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
 }
 
-var xxx_messageInfo_SignRound8Message proto.InternalMessageInfo
+// Deprecated: Use SignRound8Message.ProtoReflect.Descriptor instead.
+func (*SignRound8Message) Descriptor() ([]byte, []int) {
+	return file_protob_ecdsa_signing_proto_rawDescGZIP(), []int{8}
+}
 
-func (m *SignRound8Message) GetDeCommitment() [][]byte {
-	if m != nil {
-		return m.DeCommitment
+func (x *SignRound8Message) GetDeCommitment() [][]byte {
+	if x != nil {
+		return x.DeCommitment
 	}
 	return nil
 }
@@ -504,84 +582,297 @@ func (m *SignRound8Message) GetDeCommitment() [][]byte {
 //
 // Represents a BROADCAST message sent to all parties during Round 9 of the ECDSA TSS signing protocol.
 type SignRound9Message struct {
-	S                    []byte   `protobuf:"bytes,1,opt,name=s,proto3" json:"s,omitempty"`
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
-}
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
 
-func (m *SignRound9Message) Reset()         { *m = SignRound9Message{} }
-func (m *SignRound9Message) String() string { return proto.CompactTextString(m) }
-func (*SignRound9Message) ProtoMessage()    {}
-func (*SignRound9Message) Descriptor() ([]byte, []int) {
-	return fileDescriptor_5f861bfc687bec19, []int{9}
+	S []byte `protobuf:"bytes,1,opt,name=s,proto3" json:"s,omitempty"`
 }
 
-func (m *SignRound9Message) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_SignRound9Message.Unmarshal(m, b)
-}
-func (m *SignRound9Message) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_SignRound9Message.Marshal(b, m, deterministic)
-}
-func (m *SignRound9Message) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_SignRound9Message.Merge(m, src)
+func (x *SignRound9Message) Reset() {
+	*x = SignRound9Message{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_protob_ecdsa_signing_proto_msgTypes[9]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
 }
-func (m *SignRound9Message) XXX_Size() int {
-	return xxx_messageInfo_SignRound9Message.Size(m)
+
+func (x *SignRound9Message) String() string {
+	return protoimpl.X.MessageStringOf(x)
 }
-func (m *SignRound9Message) XXX_DiscardUnknown() {
-	xxx_messageInfo_SignRound9Message.DiscardUnknown(m)
+
+func (*SignRound9Message) ProtoMessage() {}
+
+func (x *SignRound9Message) ProtoReflect() protoreflect.Message {
+	mi := &file_protob_ecdsa_signing_proto_msgTypes[9]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
 }
 
-var xxx_messageInfo_SignRound9Message proto.InternalMessageInfo
+// Deprecated: Use SignRound9Message.ProtoReflect.Descriptor instead.
+func (*SignRound9Message) Descriptor() ([]byte, []int) {
+	return file_protob_ecdsa_signing_proto_rawDescGZIP(), []int{9}
+}
 
-func (m *SignRound9Message) GetS() []byte {
-	if m != nil {
-		return m.S
+func (x *SignRound9Message) GetS() []byte {
+	if x != nil {
+		return x.S
 	}
 	return nil
 }
 
-func init() {
-	proto.RegisterType((*SignRound1Message1)(nil), "SignRound1Message1")
-	proto.RegisterType((*SignRound1Message2)(nil), "SignRound1Message2")
-	proto.RegisterType((*SignRound2Message)(nil), "SignRound2Message")
-	proto.RegisterType((*SignRound3Message)(nil), "SignRound3Message")
-	proto.RegisterType((*SignRound4Message)(nil), "SignRound4Message")
-	proto.RegisterType((*SignRound5Message)(nil), "SignRound5Message")
-	proto.RegisterType((*SignRound6Message)(nil), "SignRound6Message")
-	proto.RegisterType((*SignRound7Message)(nil), "SignRound7Message")
-	proto.RegisterType((*SignRound8Message)(nil), "SignRound8Message")
-	proto.RegisterType((*SignRound9Message)(nil), "SignRound9Message")
-}
-
-func init() { proto.RegisterFile("protob/ecdsa-signing.proto", fileDescriptor_5f861bfc687bec19) }
-
-var fileDescriptor_5f861bfc687bec19 = []byte{
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+var File_protob_ecdsa_signing_proto protoreflect.FileDescriptor
+
+var file_protob_ecdsa_signing_proto_rawDesc = []byte{
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+	0x66, 0x55, 0x22, 0x33, 0x0a, 0x11, 0x53, 0x69, 0x67, 0x6e, 0x52, 0x6f, 0x75, 0x6e, 0x64, 0x37,
+	0x4d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x12, 0x1e, 0x0a, 0x0a, 0x63, 0x6f, 0x6d, 0x6d, 0x69,
+	0x74, 0x6d, 0x65, 0x6e, 0x74, 0x18, 0x01, 0x20, 0x01, 0x28, 0x0c, 0x52, 0x0a, 0x63, 0x6f, 0x6d,
+	0x6d, 0x69, 0x74, 0x6d, 0x65, 0x6e, 0x74, 0x22, 0x38, 0x0a, 0x11, 0x53, 0x69, 0x67, 0x6e, 0x52,
+	0x6f, 0x75, 0x6e, 0x64, 0x38, 0x4d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x12, 0x23, 0x0a, 0x0d,
+	0x64, 0x65, 0x5f, 0x63, 0x6f, 0x6d, 0x6d, 0x69, 0x74, 0x6d, 0x65, 0x6e, 0x74, 0x18, 0x01, 0x20,
+	0x03, 0x28, 0x0c, 0x52, 0x0c, 0x64, 0x65, 0x43, 0x6f, 0x6d, 0x6d, 0x69, 0x74, 0x6d, 0x65, 0x6e,
+	0x74, 0x22, 0x21, 0x0a, 0x11, 0x53, 0x69, 0x67, 0x6e, 0x52, 0x6f, 0x75, 0x6e, 0x64, 0x39, 0x4d,
+	0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x12, 0x0c, 0x0a, 0x01, 0x73, 0x18, 0x01, 0x20, 0x01, 0x28,
+	0x0c, 0x52, 0x01, 0x73, 0x42, 0x0f, 0x5a, 0x0d, 0x65, 0x63, 0x64, 0x73, 0x61, 0x2f, 0x73, 0x69,
+	0x67, 0x6e, 0x69, 0x6e, 0x67, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+}
+
+var (
+	file_protob_ecdsa_signing_proto_rawDescOnce sync.Once
+	file_protob_ecdsa_signing_proto_rawDescData = file_protob_ecdsa_signing_proto_rawDesc
+)
+
+func file_protob_ecdsa_signing_proto_rawDescGZIP() []byte {
+	file_protob_ecdsa_signing_proto_rawDescOnce.Do(func() {
+		file_protob_ecdsa_signing_proto_rawDescData = protoimpl.X.CompressGZIP(file_protob_ecdsa_signing_proto_rawDescData)
+	})
+	return file_protob_ecdsa_signing_proto_rawDescData
+}
+
+var file_protob_ecdsa_signing_proto_msgTypes = make([]protoimpl.MessageInfo, 10)
+var file_protob_ecdsa_signing_proto_goTypes = []interface{}{
+	(*SignRound1Message1)(nil), // 0: binance.tsslib.ecdsa.signing.SignRound1Message1
+	(*SignRound1Message2)(nil), // 1: binance.tsslib.ecdsa.signing.SignRound1Message2
+	(*SignRound2Message)(nil),  // 2: binance.tsslib.ecdsa.signing.SignRound2Message
+	(*SignRound3Message)(nil),  // 3: binance.tsslib.ecdsa.signing.SignRound3Message
+	(*SignRound4Message)(nil),  // 4: binance.tsslib.ecdsa.signing.SignRound4Message
+	(*SignRound5Message)(nil),  // 5: binance.tsslib.ecdsa.signing.SignRound5Message
+	(*SignRound6Message)(nil),  // 6: binance.tsslib.ecdsa.signing.SignRound6Message
+	(*SignRound7Message)(nil),  // 7: binance.tsslib.ecdsa.signing.SignRound7Message
+	(*SignRound8Message)(nil),  // 8: binance.tsslib.ecdsa.signing.SignRound8Message
+	(*SignRound9Message)(nil),  // 9: binance.tsslib.ecdsa.signing.SignRound9Message
+}
+var file_protob_ecdsa_signing_proto_depIdxs = []int32{
+	0, // [0:0] is the sub-list for method output_type
+	0, // [0:0] is the sub-list for method input_type
+	0, // [0:0] is the sub-list for extension type_name
+	0, // [0:0] is the sub-list for extension extendee
+	0, // [0:0] is the sub-list for field type_name
+}
+
+func init() { file_protob_ecdsa_signing_proto_init() }
+func file_protob_ecdsa_signing_proto_init() {
+	if File_protob_ecdsa_signing_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_protob_ecdsa_signing_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*SignRound1Message1); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_protob_ecdsa_signing_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*SignRound1Message2); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_protob_ecdsa_signing_proto_msgTypes[2].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*SignRound2Message); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_protob_ecdsa_signing_proto_msgTypes[3].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*SignRound3Message); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_protob_ecdsa_signing_proto_msgTypes[4].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*SignRound4Message); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_protob_ecdsa_signing_proto_msgTypes[5].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*SignRound5Message); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_protob_ecdsa_signing_proto_msgTypes[6].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*SignRound6Message); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_protob_ecdsa_signing_proto_msgTypes[7].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*SignRound7Message); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_protob_ecdsa_signing_proto_msgTypes[8].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*SignRound8Message); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_protob_ecdsa_signing_proto_msgTypes[9].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*SignRound9Message); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_protob_ecdsa_signing_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   10,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_protob_ecdsa_signing_proto_goTypes,
+		DependencyIndexes: file_protob_ecdsa_signing_proto_depIdxs,
+		MessageInfos:      file_protob_ecdsa_signing_proto_msgTypes,
+	}.Build()
+	File_protob_ecdsa_signing_proto = out.File
+	file_protob_ecdsa_signing_proto_rawDesc = nil
+	file_protob_ecdsa_signing_proto_goTypes = nil
+	file_protob_ecdsa_signing_proto_depIdxs = nil
 }
diff --git a/ecdsa/signing/finalize.go b/ecdsa/signing/finalize.go
index ae0ca8ac..995702fe 100644
--- a/ecdsa/signing/finalize.go
+++ b/ecdsa/signing/finalize.go
@@ -12,8 +12,8 @@ import (
 	"fmt"
 	"math/big"
 
-	"github.com/binance-chain/tss-lib/common"
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/common"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 func (round *finalization) Start() *tss.Error {
@@ -25,7 +25,7 @@ func (round *finalization) Start() *tss.Error {
 	round.resetOK()
 
 	sumS := round.temp.si
-	modN := common.ModInt(tss.EC().Params().N)
+	modN := common.ModInt(round.Params().EC().Params().N)
 
 	for j := range round.Parties().IDs() {
 		round.ok[j] = true
@@ -38,7 +38,7 @@ func (round *finalization) Start() *tss.Error {
 
 	recid := 0
 	// byte v = if(R.X > curve.N) then 2 else 0) | (if R.Y.IsEven then 0 else 1);
-	if round.temp.rx.Cmp(tss.EC().Params().N) > 0 {
+	if round.temp.rx.Cmp(round.Params().EC().Params().N) > 0 {
 		recid = 2
 	}
 	if round.temp.ry.Bit(0) != 0 {
@@ -49,21 +49,22 @@ func (round *finalization) Start() *tss.Error {
 	// https://github.com/btcsuite/btcd/blob/c26ffa870fd817666a857af1bf6498fabba1ffe3/btcec/signature.go#L442-L444
 	// This is needed because of tendermint checks here:
 	// https://github.com/tendermint/tendermint/blob/d9481e3648450cb99e15c6a070c1fb69aa0c255b/crypto/secp256k1/secp256k1_nocgo.go#L43-L47
-	secp256k1halfN := new(big.Int).Rsh(tss.EC().Params().N, 1)
+	secp256k1halfN := new(big.Int).Rsh(round.Params().EC().Params().N, 1)
 	if sumS.Cmp(secp256k1halfN) > 0 {
-		sumS.Sub(tss.EC().Params().N, sumS)
+		sumS.Sub(round.Params().EC().Params().N, sumS)
 		recid ^= 1
 	}
 
 	// save the signature for final output
-	round.data.Signature = append(round.temp.rx.Bytes(), sumS.Bytes()...)
+	bitSizeInBytes := round.Params().EC().Params().BitSize / 8
+	round.data.R = padToLengthBytesInPlace(round.temp.rx.Bytes(), bitSizeInBytes)
+	round.data.S = padToLengthBytesInPlace(sumS.Bytes(), bitSizeInBytes)
+	round.data.Signature = append(round.data.R, round.data.S...)
 	round.data.SignatureRecovery = []byte{byte(recid)}
-	round.data.R = round.temp.rx.Bytes()
-	round.data.S = sumS.Bytes()
 	round.data.M = round.temp.m.Bytes()
 
 	pk := ecdsa.PublicKey{
-		Curve: tss.EC(),
+		Curve: round.Params().EC(),
 		X:     round.key.ECDSAPub.X(),
 		Y:     round.key.ECDSAPub.Y(),
 	}
@@ -72,7 +73,7 @@ func (round *finalization) Start() *tss.Error {
 		return round.WrapError(fmt.Errorf("signature verification failed"))
 	}
 
-	round.end <- *round.data
+	round.end <- round.data
 
 	return nil
 }
@@ -90,3 +91,13 @@ func (round *finalization) Update() (bool, *tss.Error) {
 func (round *finalization) NextRound() tss.Round {
 	return nil // finished!
 }
+
+func padToLengthBytesInPlace(src []byte, length int) []byte {
+	oriLen := len(src)
+	if oriLen < length {
+		for i := 0; i < length-oriLen; i++ {
+			src = append([]byte{0}, src...)
+		}
+	}
+	return src
+}
diff --git a/ecdsa/signing/key_derivation_util.go b/ecdsa/signing/key_derivation_util.go
new file mode 100644
index 00000000..668d9d4f
--- /dev/null
+++ b/ecdsa/signing/key_derivation_util.go
@@ -0,0 +1,59 @@
+// Copyright © 2021 Swingby
+
+package signing
+
+import (
+	"crypto/ecdsa"
+	"crypto/elliptic"
+	"math/big"
+
+	"github.com/bnb-chain/tss-lib/v2/common"
+	"github.com/bnb-chain/tss-lib/v2/crypto"
+	"github.com/bnb-chain/tss-lib/v2/crypto/ckd"
+	"github.com/bnb-chain/tss-lib/v2/ecdsa/keygen"
+
+	"github.com/btcsuite/btcd/chaincfg"
+)
+
+func UpdatePublicKeyAndAdjustBigXj(keyDerivationDelta *big.Int, keys []keygen.LocalPartySaveData, extendedChildPk *ecdsa.PublicKey, ec elliptic.Curve) error {
+	var err error
+	gDelta := crypto.ScalarBaseMult(ec, keyDerivationDelta)
+	for k := range keys {
+		keys[k].ECDSAPub, err = crypto.NewECPoint(ec, extendedChildPk.X, extendedChildPk.Y)
+		if err != nil {
+			common.Logger.Errorf("error creating new extended child public key")
+			return err
+		}
+		// Suppose X_j has shamir shares X_j0,     X_j1,     ..., X_jn
+		// So X_j + D has shamir shares  X_j0 + D, X_j1 + D, ..., X_jn + D
+		for j := range keys[k].BigXj {
+			keys[k].BigXj[j], err = keys[k].BigXj[j].Add(gDelta)
+			if err != nil {
+				common.Logger.Errorf("error in delta operation")
+				return err
+			}
+		}
+	}
+	return nil
+}
+
+func derivingPubkeyFromPath(masterPub *crypto.ECPoint, chainCode []byte, path []uint32, ec elliptic.Curve) (*big.Int, *ckd.ExtendedKey, error) {
+	// build ecdsa key pair
+	pk := ecdsa.PublicKey{
+		Curve: ec,
+		X:     masterPub.X(),
+		Y:     masterPub.Y(),
+	}
+
+	net := &chaincfg.MainNetParams
+	extendedParentPk := &ckd.ExtendedKey{
+		PublicKey:  pk,
+		Depth:      0,
+		ChildIndex: 0,
+		ChainCode:  chainCode[:],
+		ParentFP:   []byte{0x00, 0x00, 0x00, 0x00},
+		Version:    net.HDPrivateKeyID[:],
+	}
+
+	return ckd.DeriveChildKeyFromHierarchy(path, extendedParentPk, ec.Params().N, ec)
+}
diff --git a/ecdsa/signing/local_party.go b/ecdsa/signing/local_party.go
index cde5c271..ae34ad00 100644
--- a/ecdsa/signing/local_party.go
+++ b/ecdsa/signing/local_party.go
@@ -11,12 +11,12 @@ import (
 	"fmt"
 	"math/big"
 
-	"github.com/binance-chain/tss-lib/common"
-	"github.com/binance-chain/tss-lib/crypto"
-	cmt "github.com/binance-chain/tss-lib/crypto/commitments"
-	"github.com/binance-chain/tss-lib/crypto/mta"
-	"github.com/binance-chain/tss-lib/ecdsa/keygen"
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/common"
+	"github.com/bnb-chain/tss-lib/v2/crypto"
+	cmt "github.com/bnb-chain/tss-lib/v2/crypto/commitments"
+	"github.com/bnb-chain/tss-lib/v2/crypto/mta"
+	"github.com/bnb-chain/tss-lib/v2/ecdsa/keygen"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 // Implements Party
@@ -31,11 +31,11 @@ type (
 
 		keys keygen.LocalPartySaveData
 		temp localTempData
-		data common.SignatureData
+		data *common.SignatureData
 
 		// outbound messaging
 		out chan<- tss.Message
-		end chan<- common.SignatureData
+		end chan<- *common.SignatureData
 	}
 
 	localMessageStore struct {
@@ -61,6 +61,7 @@ type (
 		theta,
 		thetaInverse,
 		sigma,
+		keyDerivationDelta,
 		gamma *big.Int
 		cis        []*big.Int
 		bigWs      []*crypto.ECPoint
@@ -90,6 +91,9 @@ type (
 		Ui,
 		Ti *crypto.ECPoint
 		DTelda cmt.HashDeCommitment
+
+		ssidNonce *big.Int
+		ssid      []byte
 	}
 )
 
@@ -98,7 +102,18 @@ func NewLocalParty(
 	params *tss.Parameters,
 	key keygen.LocalPartySaveData,
 	out chan<- tss.Message,
-	end chan<- common.SignatureData,
+	end chan<- *common.SignatureData) tss.Party {
+	return NewLocalPartyWithKDD(msg, params, key, nil, out, end)
+}
+
+// NewLocalPartyWithKDD returns a party with key derivation delta for HD support
+func NewLocalPartyWithKDD(
+	msg *big.Int,
+	params *tss.Parameters,
+	key keygen.LocalPartySaveData,
+	keyDerivationDelta *big.Int,
+	out chan<- tss.Message,
+	end chan<- *common.SignatureData,
 ) tss.Party {
 	partyCount := len(params.Parties().IDs())
 	p := &LocalParty{
@@ -106,7 +121,7 @@ func NewLocalParty(
 		params:    params,
 		keys:      keygen.BuildLocalSaveDataSubset(key, params.Parties().IDs()),
 		temp:      localTempData{},
-		data:      common.SignatureData{},
+		data:      &common.SignatureData{},
 		out:       out,
 		end:       end,
 	}
@@ -122,6 +137,7 @@ func NewLocalParty(
 	p.temp.signRound8Messages = make([]tss.ParsedMessage, partyCount)
 	p.temp.signRound9Messages = make([]tss.ParsedMessage, partyCount)
 	// temp data init
+	p.temp.keyDerivationDelta = keyDerivationDelta
 	p.temp.m = msg
 	p.temp.cis = make([]*big.Int, partyCount)
 	p.temp.bigWs = make([]*crypto.ECPoint, partyCount)
@@ -135,7 +151,7 @@ func NewLocalParty(
 }
 
 func (p *LocalParty) FirstRound() tss.Round {
-	return newRound1(p.params, &p.keys, &p.data, &p.temp, p.out, p.end)
+	return newRound1(p.params, &p.keys, p.data, &p.temp, p.out, p.end)
 }
 
 func (p *LocalParty) Start() *tss.Error {
diff --git a/ecdsa/signing/local_party_test.go b/ecdsa/signing/local_party_test.go
index 574644db..a1680b5f 100644
--- a/ecdsa/signing/local_party_test.go
+++ b/ecdsa/signing/local_party_test.go
@@ -14,13 +14,14 @@ import (
 	"sync/atomic"
 	"testing"
 
+	"github.com/btcsuite/btcd/btcec/v2"
 	"github.com/ipfs/go-log"
 	"github.com/stretchr/testify/assert"
 
-	"github.com/binance-chain/tss-lib/common"
-	"github.com/binance-chain/tss-lib/ecdsa/keygen"
-	"github.com/binance-chain/tss-lib/test"
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/common"
+	"github.com/bnb-chain/tss-lib/v2/ecdsa/keygen"
+	"github.com/bnb-chain/tss-lib/v2/test"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 const (
@@ -51,13 +52,13 @@ func TestE2EConcurrent(t *testing.T) {
 
 	errCh := make(chan *tss.Error, len(signPIDs))
 	outCh := make(chan tss.Message, len(signPIDs))
-	endCh := make(chan common.SignatureData, len(signPIDs))
+	endCh := make(chan *common.SignatureData, len(signPIDs))
 
 	updater := test.SharedPartyUpdater
 
 	// init the parties
 	for i := 0; i < len(signPIDs); i++ {
-		params := tss.NewParameters(p2pCtx, signPIDs[i], len(signPIDs), threshold)
+		params := tss.NewParameters(tss.S256(), p2pCtx, signPIDs[i], len(signPIDs), threshold)
 
 		P := NewLocalParty(big.NewInt(42), params, keys[i], outCh, endCh).(*LocalParty)
 		parties = append(parties, P)
@@ -102,7 +103,7 @@ signing:
 				r := parties[0].temp.rx
 				fmt.Printf("sign result: R(%s, %s), r=%s\n", R.X().String(), R.Y().String(), r.String())
 
-				modN := common.ModInt(tss.EC().Params().N)
+				modN := common.ModInt(tss.S256().Params().N)
 
 				// BEGIN check s correctness
 				sumS := big.NewInt(0)
@@ -129,3 +130,135 @@ signing:
 		}
 	}
 }
+
+func TestE2EWithHDKeyDerivation(t *testing.T) {
+	setUp("info")
+	threshold := testThreshold
+
+	// PHASE: load keygen fixtures
+	keys, signPIDs, err := keygen.LoadKeygenTestFixturesRandomSet(testThreshold+1, testParticipants)
+	assert.NoError(t, err, "should load keygen fixtures")
+	assert.Equal(t, testThreshold+1, len(keys))
+	assert.Equal(t, testThreshold+1, len(signPIDs))
+
+	chainCode := make([]byte, 32)
+	max32b := new(big.Int).Lsh(new(big.Int).SetUint64(1), 256)
+	max32b = new(big.Int).Sub(max32b, new(big.Int).SetUint64(1))
+	fillBytes(common.GetRandomPositiveInt(max32b), chainCode)
+
+	il, extendedChildPk, errorDerivation := derivingPubkeyFromPath(keys[0].ECDSAPub, chainCode, []uint32{12, 209, 3}, btcec.S256())
+	assert.NoErrorf(t, errorDerivation, "there should not be an error deriving the child public key")
+
+	keyDerivationDelta := il
+
+	err = UpdatePublicKeyAndAdjustBigXj(keyDerivationDelta, keys, &extendedChildPk.PublicKey, btcec.S256())
+	assert.NoErrorf(t, err, "there should not be an error setting the derived keys")
+
+	// PHASE: signing
+	// use a shuffled selection of the list of parties for this test
+	p2pCtx := tss.NewPeerContext(signPIDs)
+	parties := make([]*LocalParty, 0, len(signPIDs))
+
+	errCh := make(chan *tss.Error, len(signPIDs))
+	outCh := make(chan tss.Message, len(signPIDs))
+	endCh := make(chan *common.SignatureData, len(signPIDs))
+
+	updater := test.SharedPartyUpdater
+
+	// init the parties
+	for i := 0; i < len(signPIDs); i++ {
+		params := tss.NewParameters(tss.S256(), p2pCtx, signPIDs[i], len(signPIDs), threshold)
+
+		P := NewLocalPartyWithKDD(big.NewInt(42), params, keys[i], keyDerivationDelta, outCh, endCh).(*LocalParty)
+		parties = append(parties, P)
+		go func(P *LocalParty) {
+			if err := P.Start(); err != nil {
+				errCh <- err
+			}
+		}(P)
+	}
+
+	var ended int32
+signing:
+	for {
+		select {
+		case err := <-errCh:
+			common.Logger.Errorf("Error: %s", err)
+			assert.FailNow(t, err.Error())
+			break signing
+
+		case msg := <-outCh:
+			dest := msg.GetTo()
+			if dest == nil {
+				for _, P := range parties {
+					if P.PartyID().Index == msg.GetFrom().Index {
+						continue
+					}
+					go updater(P, msg, errCh)
+				}
+			} else {
+				if dest[0].Index == msg.GetFrom().Index {
+					t.Fatalf("party %d tried to send a message to itself (%d)", dest[0].Index, msg.GetFrom().Index)
+				}
+				go updater(parties[dest[0].Index], msg, errCh)
+			}
+
+		case <-endCh:
+			atomic.AddInt32(&ended, 1)
+			if atomic.LoadInt32(&ended) == int32(len(signPIDs)) {
+				t.Logf("Done. Received signature data from %d participants", ended)
+				R := parties[0].temp.bigR
+				r := parties[0].temp.rx
+				fmt.Printf("sign result: R(%s, %s), r=%s\n", R.X().String(), R.Y().String(), r.String())
+
+				modN := common.ModInt(tss.S256().Params().N)
+
+				// BEGIN check s correctness
+				sumS := big.NewInt(0)
+				for _, p := range parties {
+					sumS = modN.Add(sumS, p.temp.si)
+				}
+				fmt.Printf("S: %s\n", sumS.String())
+				// END check s correctness
+
+				// BEGIN ECDSA verify
+				pkX, pkY := keys[0].ECDSAPub.X(), keys[0].ECDSAPub.Y()
+				pk := ecdsa.PublicKey{
+					Curve: tss.EC(),
+					X:     pkX,
+					Y:     pkY,
+				}
+				ok := ecdsa.Verify(&pk, big.NewInt(42).Bytes(), R.X(), sumS)
+				assert.True(t, ok, "ecdsa verify must pass")
+				t.Log("ECDSA signing test done.")
+				// END ECDSA verify
+
+				break signing
+			}
+		}
+	}
+}
+
+func TestFillTo32BytesInPlace(t *testing.T) {
+	s := big.NewInt(123456789)
+	normalizedS := padToLengthBytesInPlace(s.Bytes(), 32)
+	assert.True(t, big.NewInt(0).SetBytes(normalizedS).Cmp(s) == 0)
+	assert.Equal(t, 32, len(normalizedS))
+	assert.NotEqual(t, 32, len(s.Bytes()))
+}
+
+func fillBytes(x *big.Int, buf []byte) []byte {
+	b := x.Bytes()
+	if len(b) > len(buf) {
+		panic("buffer too small")
+	}
+	offset := len(buf) - len(b)
+	for i := range buf {
+		if i < offset {
+			buf[i] = 0
+		} else {
+			buf[i] = b[i-offset]
+		}
+	}
+	return buf
+}
diff --git a/ecdsa/signing/messages.go b/ecdsa/signing/messages.go
index 3cbfa39d..8d3d853a 100644
--- a/ecdsa/signing/messages.go
+++ b/ecdsa/signing/messages.go
@@ -7,16 +7,15 @@
 package signing
 
 import (
+	"crypto/elliptic"
 	"math/big"
 
-	"github.com/golang/protobuf/proto"
-
-	"github.com/binance-chain/tss-lib/common"
-	"github.com/binance-chain/tss-lib/crypto"
-	cmt "github.com/binance-chain/tss-lib/crypto/commitments"
-	"github.com/binance-chain/tss-lib/crypto/mta"
-	"github.com/binance-chain/tss-lib/crypto/schnorr"
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/common"
+	"github.com/bnb-chain/tss-lib/v2/crypto"
+	cmt "github.com/bnb-chain/tss-lib/v2/crypto/commitments"
+	"github.com/bnb-chain/tss-lib/v2/crypto/mta"
+	"github.com/bnb-chain/tss-lib/v2/crypto/schnorr"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 // These messages were generated from Protocol Buffers definitions into ecdsa-signing.pb.go
@@ -38,19 +37,6 @@ var (
 	}
 )
 
-func init() {
-	proto.RegisterType((*SignRound1Message1)(nil), tss.ECDSAProtoNamePrefix+"signing.SignRound1Message1")
-	proto.RegisterType((*SignRound1Message2)(nil), tss.ECDSAProtoNamePrefix+"signing.SignRound1Message2")
-	proto.RegisterType((*SignRound2Message)(nil), tss.ECDSAProtoNamePrefix+"signing.SignRound2Message")
-	proto.RegisterType((*SignRound3Message)(nil), tss.ECDSAProtoNamePrefix+"signing.SignRound3Message")
-	proto.RegisterType((*SignRound4Message)(nil), tss.ECDSAProtoNamePrefix+"signing.SignRound4Message")
-	proto.RegisterType((*SignRound5Message)(nil), tss.ECDSAProtoNamePrefix+"signing.SignRound5Message")
-	proto.RegisterType((*SignRound6Message)(nil), tss.ECDSAProtoNamePrefix+"signing.SignRound6Message")
-	proto.RegisterType((*SignRound7Message)(nil), tss.ECDSAProtoNamePrefix+"signing.SignRound7Message")
-	proto.RegisterType((*SignRound8Message)(nil), tss.ECDSAProtoNamePrefix+"signing.SignRound8Message")
-	proto.RegisterType((*SignRound9Message)(nil), tss.ECDSAProtoNamePrefix+"signing.SignRound9Message")
-}
-
 // ----- //
 
 func NewSignRound1Message1(
@@ -150,8 +136,8 @@ func (m *SignRound2Message) UnmarshalProofBob() (*mta.ProofBob, error) {
 	return mta.ProofBobFromBytes(m.ProofBob)
 }
 
-func (m *SignRound2Message) UnmarshalProofBobWC() (*mta.ProofBobWC, error) {
-	return mta.ProofBobWCFromBytes(m.ProofBobWc)
+func (m *SignRound2Message) UnmarshalProofBobWC(ec elliptic.Curve) (*mta.ProofBobWC, error) {
+	return mta.ProofBobWCFromBytes(ec, m.ProofBobWc)
 }
 
 // ----- //
@@ -211,9 +197,9 @@ func (m *SignRound4Message) UnmarshalDeCommitment() []*big.Int {
 	return cmt.NewHashDeCommitmentFromBytes(deComBzs)
 }
 
-func (m *SignRound4Message) UnmarshalZKProof() (*schnorr.ZKProof, error) {
+func (m *SignRound4Message) UnmarshalZKProof(ec elliptic.Curve) (*schnorr.ZKProof, error) {
 	point, err := crypto.NewECPoint(
-		tss.EC(),
+		ec,
 		new(big.Int).SetBytes(m.GetProofAlphaX()),
 		new(big.Int).SetBytes(m.GetProofAlphaY()))
 	if err != nil {
@@ -295,9 +281,9 @@ func (m *SignRound6Message) UnmarshalDeCommitment() []*big.Int {
 	return cmt.NewHashDeCommitmentFromBytes(deComBzs)
 }
 
-func (m *SignRound6Message) UnmarshalZKProof() (*schnorr.ZKProof, error) {
+func (m *SignRound6Message) UnmarshalZKProof(ec elliptic.Curve) (*schnorr.ZKProof, error) {
 	point, err := crypto.NewECPoint(
-		tss.EC(),
+		ec,
 		new(big.Int).SetBytes(m.GetProofAlphaX()),
 		new(big.Int).SetBytes(m.GetProofAlphaY()))
 	if err != nil {
@@ -309,9 +295,9 @@ func (m *SignRound6Message) UnmarshalZKProof() (*schnorr.ZKProof, error) {
 	}, nil
 }
 
-func (m *SignRound6Message) UnmarshalZKVProof() (*schnorr.ZKVProof, error) {
+func (m *SignRound6Message) UnmarshalZKVProof(ec elliptic.Curve) (*schnorr.ZKVProof, error) {
 	point, err := crypto.NewECPoint(
-		tss.EC(),
+		ec,
 		new(big.Int).SetBytes(m.GetVProofAlphaX()),
 		new(big.Int).SetBytes(m.GetVProofAlphaY()))
 	if err != nil {
diff --git a/ecdsa/signing/prepare.go b/ecdsa/signing/prepare.go
index 149fa331..ae6d186c 100644
--- a/ecdsa/signing/prepare.go
+++ b/ecdsa/signing/prepare.go
@@ -7,17 +7,17 @@
 package signing
 
 import (
+	"crypto/elliptic"
 	"fmt"
 	"math/big"
 
-	"github.com/binance-chain/tss-lib/common"
-	"github.com/binance-chain/tss-lib/crypto"
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/common"
+	"github.com/bnb-chain/tss-lib/v2/crypto"
 )
 
 // PrepareForSigning(), GG18Spec (11) Fig. 14
-func PrepareForSigning(i, pax int, xi *big.Int, ks []*big.Int, bigXs []*crypto.ECPoint) (wi *big.Int, bigWs []*crypto.ECPoint) {
-	modQ := common.ModInt(tss.EC().Params().N)
+func PrepareForSigning(ec elliptic.Curve, i, pax int, xi *big.Int, ks []*big.Int, bigXs []*crypto.ECPoint) (wi *big.Int, bigWs []*crypto.ECPoint) {
+	modQ := common.ModInt(ec.Params().N)
 	if len(ks) != len(bigXs) {
 		panic(fmt.Errorf("PrepareForSigning: len(ks) != len(bigXs) (%d != %d)", len(ks), len(bigXs)))
 	}
@@ -34,8 +34,13 @@ func PrepareForSigning(i, pax int, xi *big.Int, ks []*big.Int, bigXs []*crypto.E
 		if j == i {
 			continue
 		}
+		ksj := ks[j]
+		ksi := ks[i]
+		if ksj.Cmp(ksi) == 0 {
+			panic(fmt.Errorf("index of two parties are equal"))
+		}
 		// big.Int Div is calculated as: a/b = a * modInv(b,q)
-		coef := modQ.Mul(ks[j], modQ.ModInverse(new(big.Int).Sub(ks[j], ks[i])))
+		coef := modQ.Mul(ks[j], modQ.ModInverse(new(big.Int).Sub(ksj, ksi)))
 		wi = modQ.Mul(wi, coef)
 	}
 
diff --git a/ecdsa/signing/round_1.go b/ecdsa/signing/round_1.go
index 99a3f06b..924b080f 100644
--- a/ecdsa/signing/round_1.go
+++ b/ecdsa/signing/round_1.go
@@ -11,12 +11,12 @@ import (
 	"fmt"
 	"math/big"
 
-	"github.com/binance-chain/tss-lib/common"
-	"github.com/binance-chain/tss-lib/crypto"
-	"github.com/binance-chain/tss-lib/crypto/commitments"
-	"github.com/binance-chain/tss-lib/crypto/mta"
-	"github.com/binance-chain/tss-lib/ecdsa/keygen"
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/common"
+	"github.com/bnb-chain/tss-lib/v2/crypto"
+	"github.com/bnb-chain/tss-lib/v2/crypto/commitments"
+	"github.com/bnb-chain/tss-lib/v2/crypto/mta"
+	"github.com/bnb-chain/tss-lib/v2/ecdsa/keygen"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 var (
@@ -24,7 +24,7 @@ var (
 )
 
 // round 1 represents round 1 of the signing part of the GG18 ECDSA TSS spec (Gennaro, Goldfeder; 2018)
-func newRound1(params *tss.Parameters, key *keygen.LocalPartySaveData, data *common.SignatureData, temp *localTempData, out chan<- tss.Message, end chan<- common.SignatureData) tss.Round {
+func newRound1(params *tss.Parameters, key *keygen.LocalPartySaveData, data *common.SignatureData, temp *localTempData, out chan<- tss.Message, end chan<- *common.SignatureData) tss.Round {
 	return &round1{
 		&base{params, key, data, temp, out, end, make([]bool, len(params.Parties().IDs())), false, 1}}
 }
@@ -38,18 +38,24 @@ func (round *round1) Start() *tss.Error {
 	// but considered different blockchain use different hash function we accept the converted big.Int
 	// if this big.Int is not belongs to Zq, the client might not comply with common rule (for ECDSA):
 	// https://github.com/btcsuite/btcd/blob/c26ffa870fd817666a857af1bf6498fabba1ffe3/btcec/signature.go#L263
-	if round.temp.m.Cmp(tss.EC().Params().N) >= 0 {
+	if round.temp.m.Cmp(round.Params().EC().Params().N) >= 0 {
 		return round.WrapError(errors.New("hashed message is not valid"))
 	}
 
 	round.number = 1
 	round.started = true
 	round.resetOK()
+	round.temp.ssidNonce = new(big.Int).SetUint64(0)
+	ssid, err := round.getSSID()
+	if err != nil {
+		return round.WrapError(err)
+	}
+	round.temp.ssid = ssid
 
-	k := common.GetRandomPositiveInt(tss.EC().Params().N)
-	gamma := common.GetRandomPositiveInt(tss.EC().Params().N)
+	k := common.GetRandomPositiveInt(round.Params().EC().Params().N)
+	gamma := common.GetRandomPositiveInt(round.Params().EC().Params().N)
 
-	pointGamma := crypto.ScalarBaseMult(tss.EC(), gamma)
+	pointGamma := crypto.ScalarBaseMult(round.Params().EC(), gamma)
 	cmt := commitments.NewHashCommitment(pointGamma.X(), pointGamma.Y())
 	round.temp.k = k
 	round.temp.gamma = gamma
@@ -63,7 +69,7 @@ func (round *round1) Start() *tss.Error {
 		if j == i {
 			continue
 		}
-		cA, pi, err := mta.AliceInit(round.key.PaillierPKs[i], k, round.key.NTildej[j], round.key.H1j[j], round.key.H2j[j])
+		cA, pi, err := mta.AliceInit(round.Params().EC(), round.key.PaillierPKs[i], k, round.key.NTildej[j], round.key.H1j[j], round.key.H2j[j])
 		if err != nil {
 			return round.WrapError(fmt.Errorf("failed to init mta: %v", err))
 		}
@@ -121,10 +127,19 @@ func (round *round1) prepare() error {
 	ks := round.key.Ks
 	bigXs := round.key.BigXj
 
+	if round.temp.keyDerivationDelta != nil {
+		// adding the key derivation delta to the xi's
+		// Suppose x has shamir shares x_0,     x_1,     ..., x_n
+		// So x + D has shamir shares  x_0 + D, x_1 + D, ..., x_n + D
+		mod := common.ModInt(round.Params().EC().Params().N)
+		xi = mod.Add(round.temp.keyDerivationDelta, xi)
+		round.key.Xi = xi
+	}
+
 	if round.Threshold()+1 > len(ks) {
 		return fmt.Errorf("t+1=%d is not satisfied by the key count of %d", round.Threshold()+1, len(ks))
 	}
-	wi, bigWs := PrepareForSigning(i, len(ks), xi, ks, bigXs)
+	wi, bigWs := PrepareForSigning(round.Params().EC(), i, len(ks), xi, ks, bigXs)
 
 	round.temp.w = wi
 	round.temp.bigWs = bigWs
diff --git a/ecdsa/signing/round_2.go b/ecdsa/signing/round_2.go
index 37e8e0cf..9a23bf1e 100644
--- a/ecdsa/signing/round_2.go
+++ b/ecdsa/signing/round_2.go
@@ -8,12 +8,13 @@ package signing
 
 import (
 	"errors"
+	"math/big"
 	"sync"
 
 	errorspkg "github.com/pkg/errors"
 
-	"github.com/binance-chain/tss-lib/crypto/mta"
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/crypto/mta"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 func (round *round2) Start() *tss.Error {
@@ -30,6 +31,7 @@ func (round *round2) Start() *tss.Error {
 	errChs := make(chan *tss.Error, (len(round.Parties().IDs())-1)*2)
 	wg := sync.WaitGroup{}
 	wg.Add((len(round.Parties().IDs()) - 1) * 2)
+	ContextI := append(round.temp.ssid, new(big.Int).SetUint64(uint64(i)).Bytes()...)
 	for j, Pj := range round.Parties().IDs() {
 		if j == i {
 			continue
@@ -44,6 +46,8 @@ func (round *round2) Start() *tss.Error {
 				return
 			}
 			beta, c1ji, _, pi1ji, err := mta.BobMid(
+				ContextI,
+				round.Parameters.EC(),
 				round.key.PaillierPKs[j],
 				rangeProofAliceJ,
 				round.temp.gamma,
@@ -72,6 +76,8 @@ func (round *round2) Start() *tss.Error {
 				return
 			}
 			v, c2ji, _, pi2ji, err := mta.BobMidWC(
+				ContextI,
+				round.Parameters.EC(),
 				round.key.PaillierPKs[j],
 				rangeProofAliceJ,
 				round.temp.w,
@@ -114,16 +120,18 @@ func (round *round2) Start() *tss.Error {
 }
 
 func (round *round2) Update() (bool, *tss.Error) {
+	ret := true
 	for j, msg := range round.temp.signRound2Messages {
 		if round.ok[j] {
 			continue
 		}
 		if msg == nil || !round.CanAccept(msg) {
-			return false, nil
+			ret = false
+			continue
 		}
 		round.ok[j] = true
 	}
-	return true, nil
+	return ret, nil
 }
 
 func (round *round2) CanAccept(msg tss.ParsedMessage) bool {
diff --git a/ecdsa/signing/round_3.go b/ecdsa/signing/round_3.go
index 709f7aaf..918648ef 100644
--- a/ecdsa/signing/round_3.go
+++ b/ecdsa/signing/round_3.go
@@ -13,9 +13,9 @@ import (
 
 	errorspkg "github.com/pkg/errors"
 
-	"github.com/binance-chain/tss-lib/common"
-	"github.com/binance-chain/tss-lib/crypto/mta"
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/common"
+	"github.com/bnb-chain/tss-lib/v2/crypto/mta"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 func (round *round3) Start() *tss.Error {
@@ -38,6 +38,7 @@ func (round *round3) Start() *tss.Error {
 		if j == i {
 			continue
 		}
+		ContextJ := append(round.temp.ssid, new(big.Int).SetUint64(uint64(j)).Bytes()...)
 		// Alice_end
 		go func(j int, Pj *tss.PartyID) {
 			defer wg.Done()
@@ -48,6 +49,8 @@ func (round *round3) Start() *tss.Error {
 				return
 			}
 			alphaIj, err := mta.AliceEnd(
+				ContextJ,
+				round.Params().EC(),
 				round.key.PaillierPKs[i],
 				proofBob,
 				round.key.H1j[i],
@@ -65,12 +68,14 @@ func (round *round3) Start() *tss.Error {
 		go func(j int, Pj *tss.PartyID) {
 			defer wg.Done()
 			r2msg := round.temp.signRound2Messages[j].Content().(*SignRound2Message)
-			proofBobWC, err := r2msg.UnmarshalProofBobWC()
+			proofBobWC, err := r2msg.UnmarshalProofBobWC(round.Parameters.EC())
 			if err != nil {
 				errChs <- round.WrapError(errorspkg.Wrapf(err, "UnmarshalProofBobWC failed"), Pj)
 				return
 			}
 			uIj, err := mta.AliceEndWC(
+				ContextJ,
+				round.Params().EC(),
 				round.key.PaillierPKs[i],
 				proofBobWC,
 				round.temp.bigWs[j],
@@ -98,7 +103,7 @@ func (round *round3) Start() *tss.Error {
 		return round.WrapError(errors.New("failed to calculate Alice_end or Alice_end_wc"), culprits...)
 	}
 
-	modN := common.ModInt(tss.EC().Params().N)
+	modN := common.ModInt(round.Params().EC().Params().N)
 	thelta := modN.Mul(round.temp.k, round.temp.gamma)
 	sigma := modN.Mul(round.temp.k, round.temp.w)
 
@@ -120,16 +125,18 @@ func (round *round3) Start() *tss.Error {
 }
 
 func (round *round3) Update() (bool, *tss.Error) {
+	ret := true
 	for j, msg := range round.temp.signRound3Messages {
 		if round.ok[j] {
 			continue
 		}
 		if msg == nil || !round.CanAccept(msg) {
-			return false, nil
+			ret = false
+			continue
 		}
 		round.ok[j] = true
 	}
-	return true, nil
+	return ret, nil
 }
 
 func (round *round3) CanAccept(msg tss.ParsedMessage) bool {
diff --git a/ecdsa/signing/round_4.go b/ecdsa/signing/round_4.go
index dbf33e5f..7fc78993 100644
--- a/ecdsa/signing/round_4.go
+++ b/ecdsa/signing/round_4.go
@@ -12,9 +12,9 @@ import (
 
 	errors2 "github.com/pkg/errors"
 
-	"github.com/binance-chain/tss-lib/common"
-	"github.com/binance-chain/tss-lib/crypto/schnorr"
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/common"
+	"github.com/bnb-chain/tss-lib/v2/crypto/schnorr"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 func (round *round4) Start() *tss.Error {
@@ -28,7 +28,7 @@ func (round *round4) Start() *tss.Error {
 	theta := *round.temp.theta
 	thetaInverse := &theta
 
-	modN := common.ModInt(tss.EC().Params().N)
+	modN := common.ModInt(round.Params().EC().Params().N)
 
 	for j := range round.Parties().IDs() {
 		if j == round.PartyID().Index {
@@ -41,7 +41,9 @@ func (round *round4) Start() *tss.Error {
 
 	// compute the multiplicative inverse thelta mod q
 	thetaInverse = modN.ModInverse(thetaInverse)
-	piGamma, err := schnorr.NewZKProof(round.temp.gamma, round.temp.pointGamma)
+	i := round.PartyID().Index
+	ContextI := append(round.temp.ssid, new(big.Int).SetUint64(uint64(i)).Bytes()...)
+	piGamma, err := schnorr.NewZKProof(ContextI, round.temp.gamma, round.temp.pointGamma)
 	if err != nil {
 		return round.WrapError(errors2.Wrapf(err, "NewZKProof(gamma, bigGamma)"))
 	}
@@ -54,16 +56,18 @@ func (round *round4) Start() *tss.Error {
 }
 
 func (round *round4) Update() (bool, *tss.Error) {
+	ret := true
 	for j, msg := range round.temp.signRound4Messages {
 		if round.ok[j] {
 			continue
 		}
 		if msg == nil || !round.CanAccept(msg) {
-			return false, nil
+			ret = false
+			continue
 		}
 		round.ok[j] = true
 	}
-	return true, nil
+	return ret, nil
 }
 
 func (round *round4) CanAccept(msg tss.ParsedMessage) bool {
diff --git a/ecdsa/signing/round_5.go b/ecdsa/signing/round_5.go
index 23e28d5f..f6ecf308 100644
--- a/ecdsa/signing/round_5.go
+++ b/ecdsa/signing/round_5.go
@@ -8,13 +8,14 @@ package signing
 
 import (
 	"errors"
+	"math/big"
 
 	errors2 "github.com/pkg/errors"
 
-	"github.com/binance-chain/tss-lib/common"
-	"github.com/binance-chain/tss-lib/crypto"
-	"github.com/binance-chain/tss-lib/crypto/commitments"
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/common"
+	"github.com/bnb-chain/tss-lib/v2/crypto"
+	"github.com/bnb-chain/tss-lib/v2/crypto/commitments"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 func (round *round5) Start() *tss.Error {
@@ -30,6 +31,7 @@ func (round *round5) Start() *tss.Error {
 		if j == round.PartyID().Index {
 			continue
 		}
+		ContextJ := common.AppendBigIntToBytesSlice(round.temp.ssid, big.NewInt(int64(j)))
 		r1msg2 := round.temp.signRound1Message2s[j].Content().(*SignRound1Message2)
 		r4msg := round.temp.signRound4Messages[j].Content().(*SignRound4Message)
 		SCj, SDj := r1msg2.UnmarshalCommitment(), r4msg.UnmarshalDeCommitment()
@@ -38,15 +40,15 @@ func (round *round5) Start() *tss.Error {
 		if !ok || len(bigGammaJ) != 2 {
 			return round.WrapError(errors.New("commitment verify failed"), Pj)
 		}
-		bigGammaJPoint, err := crypto.NewECPoint(tss.EC(), bigGammaJ[0], bigGammaJ[1])
+		bigGammaJPoint, err := crypto.NewECPoint(round.Params().EC(), bigGammaJ[0], bigGammaJ[1])
 		if err != nil {
 			return round.WrapError(errors2.Wrapf(err, "NewECPoint(bigGammaJ)"), Pj)
 		}
-		proof, err := r4msg.UnmarshalZKProof()
+		proof, err := r4msg.UnmarshalZKProof(round.Params().EC())
 		if err != nil {
 			return round.WrapError(errors.New("failed to unmarshal bigGamma proof"), Pj)
 		}
-		ok = proof.Verify(bigGammaJPoint)
+		ok = proof.Verify(ContextJ, bigGammaJPoint)
 		if !ok {
 			return round.WrapError(errors.New("failed to prove bigGamma"), Pj)
 		}
@@ -57,7 +59,7 @@ func (round *round5) Start() *tss.Error {
 	}
 
 	R = R.ScalarMult(round.temp.thetaInverse)
-	N := tss.EC().Params().N
+	N := round.Params().EC().Params().N
 	modN := common.ModInt(N)
 	rx := R.X()
 	ry := R.Y()
@@ -70,8 +72,8 @@ func (round *round5) Start() *tss.Error {
 	li := common.GetRandomPositiveInt(N)  // li
 	roI := common.GetRandomPositiveInt(N) // pi
 	rToSi := R.ScalarMult(si)
-	liPoint := crypto.ScalarBaseMult(tss.EC(), li)
-	bigAi := crypto.ScalarBaseMult(tss.EC(), roI)
+	liPoint := crypto.ScalarBaseMult(round.Params().EC(), li)
+	bigAi := crypto.ScalarBaseMult(round.Params().EC(), roI)
 	bigVi, err := rToSi.Add(liPoint)
 	if err != nil {
 		return round.WrapError(errors2.Wrapf(err, "rToSi.Add(li)"))
@@ -96,16 +98,18 @@ func (round *round5) Start() *tss.Error {
 }
 
 func (round *round5) Update() (bool, *tss.Error) {
+	ret := true
 	for j, msg := range round.temp.signRound5Messages {
 		if round.ok[j] {
 			continue
 		}
 		if msg == nil || !round.CanAccept(msg) {
-			return false, nil
+			ret = false
+			continue
 		}
 		round.ok[j] = true
 	}
-	return true, nil
+	return ret, nil
 }
 
 func (round *round5) CanAccept(msg tss.ParsedMessage) bool {
diff --git a/ecdsa/signing/round_6.go b/ecdsa/signing/round_6.go
index 536ca66e..0f8cdd03 100644
--- a/ecdsa/signing/round_6.go
+++ b/ecdsa/signing/round_6.go
@@ -8,11 +8,12 @@ package signing
 
 import (
 	"errors"
+	"math/big"
 
 	errors2 "github.com/pkg/errors"
 
-	"github.com/binance-chain/tss-lib/crypto/schnorr"
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/crypto/schnorr"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 func (round *round6) Start() *tss.Error {
@@ -23,11 +24,13 @@ func (round *round6) Start() *tss.Error {
 	round.started = true
 	round.resetOK()
 
-	piAi, err := schnorr.NewZKProof(round.temp.roi, round.temp.bigAi)
+	i := round.PartyID().Index
+	ContextI := append(round.temp.ssid, new(big.Int).SetUint64(uint64(i)).Bytes()...)
+	piAi, err := schnorr.NewZKProof(ContextI, round.temp.roi, round.temp.bigAi)
 	if err != nil {
 		return round.WrapError(errors2.Wrapf(err, "NewZKProof(roi, bigAi)"))
 	}
-	piV, err := schnorr.NewZKVProof(round.temp.bigVi, round.temp.bigR, round.temp.si, round.temp.li)
+	piV, err := schnorr.NewZKVProof(ContextI, round.temp.bigVi, round.temp.bigR, round.temp.si, round.temp.li)
 	if err != nil {
 		return round.WrapError(errors2.Wrapf(err, "NewZKVProof(bigVi, bigR, si, li)"))
 	}
@@ -39,16 +42,18 @@ func (round *round6) Start() *tss.Error {
 }
 
 func (round *round6) Update() (bool, *tss.Error) {
+	ret := true
 	for j, msg := range round.temp.signRound6Messages {
 		if round.ok[j] {
 			continue
 		}
 		if msg == nil || !round.CanAccept(msg) {
-			return false, nil
+			ret = false
+			continue
 		}
 		round.ok[j] = true
 	}
-	return true, nil
+	return ret, nil
 }
 
 func (round *round6) CanAccept(msg tss.ParsedMessage) bool {
diff --git a/ecdsa/signing/round_7.go b/ecdsa/signing/round_7.go
index a8f0cb19..e89e0fcd 100644
--- a/ecdsa/signing/round_7.go
+++ b/ecdsa/signing/round_7.go
@@ -12,10 +12,10 @@ import (
 
 	errors2 "github.com/pkg/errors"
 
-	"github.com/binance-chain/tss-lib/common"
-	"github.com/binance-chain/tss-lib/crypto"
-	"github.com/binance-chain/tss-lib/crypto/commitments"
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/common"
+	"github.com/bnb-chain/tss-lib/v2/crypto"
+	"github.com/bnb-chain/tss-lib/v2/crypto/commitments"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 func (round *round7) Start() *tss.Error {
@@ -32,6 +32,7 @@ func (round *round7) Start() *tss.Error {
 		if j == round.PartyID().Index {
 			continue
 		}
+		ContextJ := common.AppendBigIntToBytesSlice(round.temp.ssid, big.NewInt(int64(j)))
 		r5msg := round.temp.signRound5Messages[j].Content().(*SignRound5Message)
 		r6msg := round.temp.signRound6Messages[j].Content().(*SignRound6Message)
 		cj, dj := r5msg.UnmarshalCommitment(), r6msg.UnmarshalDeCommitment()
@@ -41,47 +42,47 @@ func (round *round7) Start() *tss.Error {
 			return round.WrapError(errors.New("de-commitment for bigVj and bigAj failed"), Pj)
 		}
 		bigVjX, bigVjY, bigAjX, bigAjY := values[0], values[1], values[2], values[3]
-		bigVj, err := crypto.NewECPoint(tss.EC(), bigVjX, bigVjY)
+		bigVj, err := crypto.NewECPoint(round.Params().EC(), bigVjX, bigVjY)
 		if err != nil {
 			return round.WrapError(errors2.Wrapf(err, "NewECPoint(bigVj)"), Pj)
 		}
 		bigVjs[j] = bigVj
-		bigAj, err := crypto.NewECPoint(tss.EC(), bigAjX, bigAjY)
+		bigAj, err := crypto.NewECPoint(round.Params().EC(), bigAjX, bigAjY)
 		if err != nil {
 			return round.WrapError(errors2.Wrapf(err, "NewECPoint(bigAj)"), Pj)
 		}
 		bigAjs[j] = bigAj
-		pijA, err := r6msg.UnmarshalZKProof()
-		if err != nil || !pijA.Verify(bigAj) {
+		pijA, err := r6msg.UnmarshalZKProof(round.Params().EC())
+		if err != nil || !pijA.Verify(ContextJ, bigAj) {
 			return round.WrapError(errors.New("schnorr verify for Aj failed"), Pj)
 		}
-		pijV, err := r6msg.UnmarshalZKVProof()
-		if err != nil || !pijV.Verify(bigVj, round.temp.bigR) {
+		pijV, err := r6msg.UnmarshalZKVProof(round.Params().EC())
+		if err != nil || !pijV.Verify(ContextJ, bigVj, round.temp.bigR) {
 			return round.WrapError(errors.New("vverify for Vj failed"), Pj)
 		}
 	}
 
-	modN := common.ModInt(tss.EC().Params().N)
+	modN := common.ModInt(round.Params().EC().Params().N)
 	AX, AY := round.temp.bigAi.X(), round.temp.bigAi.Y()
 	minusM := modN.Sub(big.NewInt(0), round.temp.m)
-	gToMInvX, gToMInvY := tss.EC().ScalarBaseMult(minusM.Bytes())
+	gToMInvX, gToMInvY := round.Params().EC().ScalarBaseMult(minusM.Bytes())
 	minusR := modN.Sub(big.NewInt(0), round.temp.rx)
-	yToRInvX, yToRInvY := tss.EC().ScalarMult(round.key.ECDSAPub.X(), round.key.ECDSAPub.Y(), minusR.Bytes())
-	VX, VY := tss.EC().Add(gToMInvX, gToMInvY, yToRInvX, yToRInvY)
-	VX, VY = tss.EC().Add(VX, VY, round.temp.bigVi.X(), round.temp.bigVi.Y())
+	yToRInvX, yToRInvY := round.Params().EC().ScalarMult(round.key.ECDSAPub.X(), round.key.ECDSAPub.Y(), minusR.Bytes())
+	VX, VY := round.Params().EC().Add(gToMInvX, gToMInvY, yToRInvX, yToRInvY)
+	VX, VY = round.Params().EC().Add(VX, VY, round.temp.bigVi.X(), round.temp.bigVi.Y())
 
 	for j := range round.Parties().IDs() {
 		if j == round.PartyID().Index {
 			continue
 		}
-		VX, VY = tss.EC().Add(VX, VY, bigVjs[j].X(), bigVjs[j].Y())
-		AX, AY = tss.EC().Add(AX, AY, bigAjs[j].X(), bigAjs[j].Y())
+		VX, VY = round.Params().EC().Add(VX, VY, bigVjs[j].X(), bigVjs[j].Y())
+		AX, AY = round.Params().EC().Add(AX, AY, bigAjs[j].X(), bigAjs[j].Y())
 	}
 
-	UiX, UiY := tss.EC().ScalarMult(VX, VY, round.temp.roi.Bytes())
-	TiX, TiY := tss.EC().ScalarMult(AX, AY, round.temp.li.Bytes())
-	round.temp.Ui = crypto.NewECPointNoCurveCheck(tss.EC(), UiX, UiY)
-	round.temp.Ti = crypto.NewECPointNoCurveCheck(tss.EC(), TiX, TiY)
+	UiX, UiY := round.Params().EC().ScalarMult(VX, VY, round.temp.roi.Bytes())
+	TiX, TiY := round.Params().EC().ScalarMult(AX, AY, round.temp.li.Bytes())
+	round.temp.Ui = crypto.NewECPointNoCurveCheck(round.Params().EC(), UiX, UiY)
+	round.temp.Ti = crypto.NewECPointNoCurveCheck(round.Params().EC(), TiX, TiY)
 	cmt := commitments.NewHashCommitment(UiX, UiY, TiX, TiY)
 	r7msg := NewSignRound7Message(round.PartyID(), cmt.C)
 	round.temp.signRound7Messages[round.PartyID().Index] = r7msg
@@ -92,16 +93,18 @@ func (round *round7) Start() *tss.Error {
 }
 
 func (round *round7) Update() (bool, *tss.Error) {
+	ret := true
 	for j, msg := range round.temp.signRound7Messages {
 		if round.ok[j] {
 			continue
 		}
 		if msg == nil || !round.CanAccept(msg) {
-			return false, nil
+			ret = false
+			continue
 		}
 		round.ok[j] = true
 	}
-	return true, nil
+	return ret, nil
 }
 
 func (round *round7) CanAccept(msg tss.ParsedMessage) bool {
diff --git a/ecdsa/signing/round_8.go b/ecdsa/signing/round_8.go
index 45379e52..4e3f29cb 100644
--- a/ecdsa/signing/round_8.go
+++ b/ecdsa/signing/round_8.go
@@ -9,7 +9,7 @@ package signing
 import (
 	"errors"
 
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 func (round *round8) Start() *tss.Error {
@@ -28,16 +28,18 @@ func (round *round8) Start() *tss.Error {
 }
 
 func (round *round8) Update() (bool, *tss.Error) {
+	ret := true
 	for j, msg := range round.temp.signRound8Messages {
 		if round.ok[j] {
 			continue
 		}
 		if msg == nil || !round.CanAccept(msg) {
-			return false, nil
+			ret = false
+			continue
 		}
 		round.ok[j] = true
 	}
-	return true, nil
+	return ret, nil
 }
 
 func (round *round8) CanAccept(msg tss.ParsedMessage) bool {
diff --git a/ecdsa/signing/round_9.go b/ecdsa/signing/round_9.go
index 0787f38b..a1c85d7f 100644
--- a/ecdsa/signing/round_9.go
+++ b/ecdsa/signing/round_9.go
@@ -9,8 +9,8 @@ package signing
 import (
 	"errors"
 
-	"github.com/binance-chain/tss-lib/crypto/commitments"
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/crypto/commitments"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 func (round *round9) Start() *tss.Error {
@@ -37,8 +37,8 @@ func (round *round9) Start() *tss.Error {
 			return round.WrapError(errors.New("de-commitment for bigVj and bigAj failed"), Pj)
 		}
 		UjX, UjY, TjX, TjY := values[0], values[1], values[2], values[3]
-		UX, UY = tss.EC().Add(UX, UY, UjX, UjY)
-		TX, TY = tss.EC().Add(TX, TY, TjX, TjY)
+		UX, UY = round.Params().EC().Add(UX, UY, UjX, UjY)
+		TX, TY = round.Params().EC().Add(TX, TY, TjX, TjY)
 	}
 	if UX.Cmp(TX) != 0 || UY.Cmp(TY) != 0 {
 		return round.WrapError(errors.New("U doesn't equal T"), round.PartyID())
@@ -51,16 +51,18 @@ func (round *round9) Start() *tss.Error {
 }
 
 func (round *round9) Update() (bool, *tss.Error) {
+	ret := true
 	for j, msg := range round.temp.signRound9Messages {
 		if round.ok[j] {
 			continue
 		}
 		if msg == nil || !round.CanAccept(msg) {
-			return false, nil
+			ret = false
+			continue
 		}
 		round.ok[j] = true
 	}
-	return true, nil
+	return ret, nil
 }
 
 func (round *round9) CanAccept(msg tss.ParsedMessage) bool {
diff --git a/ecdsa/signing/rounds.go b/ecdsa/signing/rounds.go
index c3ced0d3..86d01407 100644
--- a/ecdsa/signing/rounds.go
+++ b/ecdsa/signing/rounds.go
@@ -7,9 +7,13 @@
 package signing
 
 import (
-	"github.com/binance-chain/tss-lib/common"
-	"github.com/binance-chain/tss-lib/ecdsa/keygen"
-	"github.com/binance-chain/tss-lib/tss"
+	"errors"
+	"math/big"
+
+	"github.com/bnb-chain/tss-lib/v2/common"
+	"github.com/bnb-chain/tss-lib/v2/crypto"
+	"github.com/bnb-chain/tss-lib/v2/ecdsa/keygen"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 const (
@@ -23,7 +27,7 @@ type (
 		data    *common.SignatureData
 		temp    *localTempData
 		out     chan<- tss.Message
-		end     chan<- common.SignatureData
+		end     chan<- *common.SignatureData
 		ok      []bool // `ok` tracks parties which have been verified by Update()
 		started bool
 		number  int
@@ -121,3 +125,22 @@ func (round *base) resetOK() {
 		round.ok[j] = false
 	}
 }
+
+// get ssid from local params
+func (round *base) getSSID() ([]byte, error) {
+	ssidList := []*big.Int{round.EC().Params().P, round.EC().Params().N, round.EC().Params().B, round.EC().Params().Gx, round.EC().Params().Gy} // ec curve
+	ssidList = append(ssidList, round.Parties().IDs().Keys()...)                                                                                // parties
+	BigXjList, err := crypto.FlattenECPoints(round.key.BigXj)
+	if err != nil {
+		return nil, round.WrapError(errors.New("read BigXj failed"), round.PartyID())
+	}
+	ssidList = append(ssidList, BigXjList...)                    // BigXj
+	ssidList = append(ssidList, round.key.NTildej...)            // NTilde
+	ssidList = append(ssidList, round.key.H1j...)                // h1
+	ssidList = append(ssidList, round.key.H2j...)                // h2
+	ssidList = append(ssidList, big.NewInt(int64(round.number))) // round number
+	ssidList = append(ssidList, round.temp.ssidNonce)
+	ssid := common.SHA512_256i(ssidList...).Bytes()
+
+	return ssid, nil
+}
diff --git a/eddsa/keygen/eddsa-keygen.pb.go b/eddsa/keygen/eddsa-keygen.pb.go
index 7fd26e62..84327b87 100644
--- a/eddsa/keygen/eddsa-keygen.pb.go
+++ b/eddsa/keygen/eddsa-keygen.pb.go
@@ -1,62 +1,76 @@
+// Copyright © 2019 Binance
+//
+// This file is part of Binance. The full Binance copyright notice, including
+// terms governing use, modification, and redistribution, is contained in the
+// file LICENSE at the root of the source code distribution tree.
+
 // Code generated by protoc-gen-go. DO NOT EDIT.
-// source: eddsa-keygen.proto
+// versions:
+// 	protoc-gen-go v1.27.1
+// 	protoc        v3.14.0
+// source: protob/eddsa-keygen.proto
 
 package keygen
 
 import (
-	fmt "fmt"
-	proto "github.com/golang/protobuf/proto"
-	math "math"
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
 )
 
-// Reference imports to suppress errors if they are not otherwise used.
-var _ = proto.Marshal
-var _ = fmt.Errorf
-var _ = math.Inf
-
-// This is a compile-time assertion to ensure that this generated file
-// is compatible with the proto package it is being compiled against.
-// A compilation error at this line likely means your copy of the
-// proto package needs to be updated.
-const _ = proto.ProtoPackageIsVersion3 // please upgrade the proto package
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
 
 //
 // Represents a BROADCAST message sent during Round 1 of the EDDSA TSS keygen protocol.
 type KGRound1Message struct {
-	Commitment           []byte   `protobuf:"bytes,1,opt,name=commitment,proto3" json:"commitment,omitempty"`
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
-}
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
 
-func (m *KGRound1Message) Reset()         { *m = KGRound1Message{} }
-func (m *KGRound1Message) String() string { return proto.CompactTextString(m) }
-func (*KGRound1Message) ProtoMessage()    {}
-func (*KGRound1Message) Descriptor() ([]byte, []int) {
-	return fileDescriptor_87f3b4615ca57212, []int{0}
+	Commitment []byte `protobuf:"bytes,1,opt,name=commitment,proto3" json:"commitment,omitempty"`
 }
 
-func (m *KGRound1Message) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_KGRound1Message.Unmarshal(m, b)
-}
-func (m *KGRound1Message) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_KGRound1Message.Marshal(b, m, deterministic)
-}
-func (m *KGRound1Message) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_KGRound1Message.Merge(m, src)
+func (x *KGRound1Message) Reset() {
+	*x = KGRound1Message{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_protob_eddsa_keygen_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
 }
-func (m *KGRound1Message) XXX_Size() int {
-	return xxx_messageInfo_KGRound1Message.Size(m)
+
+func (x *KGRound1Message) String() string {
+	return protoimpl.X.MessageStringOf(x)
 }
-func (m *KGRound1Message) XXX_DiscardUnknown() {
-	xxx_messageInfo_KGRound1Message.DiscardUnknown(m)
+
+func (*KGRound1Message) ProtoMessage() {}
+
+func (x *KGRound1Message) ProtoReflect() protoreflect.Message {
+	mi := &file_protob_eddsa_keygen_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
 }
 
-var xxx_messageInfo_KGRound1Message proto.InternalMessageInfo
+// Deprecated: Use KGRound1Message.ProtoReflect.Descriptor instead.
+func (*KGRound1Message) Descriptor() ([]byte, []int) {
+	return file_protob_eddsa_keygen_proto_rawDescGZIP(), []int{0}
+}
 
-func (m *KGRound1Message) GetCommitment() []byte {
-	if m != nil {
-		return m.Commitment
+func (x *KGRound1Message) GetCommitment() []byte {
+	if x != nil {
+		return x.Commitment
 	}
 	return nil
 }
@@ -64,40 +78,48 @@ func (m *KGRound1Message) GetCommitment() []byte {
 //
 // Represents a P2P message sent to each party during Round 2 of the EDDSA TSS keygen protocol.
 type KGRound2Message1 struct {
-	Share                []byte   `protobuf:"bytes,1,opt,name=share,proto3" json:"share,omitempty"`
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
-}
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
 
-func (m *KGRound2Message1) Reset()         { *m = KGRound2Message1{} }
-func (m *KGRound2Message1) String() string { return proto.CompactTextString(m) }
-func (*KGRound2Message1) ProtoMessage()    {}
-func (*KGRound2Message1) Descriptor() ([]byte, []int) {
-	return fileDescriptor_87f3b4615ca57212, []int{1}
+	Share []byte `protobuf:"bytes,1,opt,name=share,proto3" json:"share,omitempty"`
 }
 
-func (m *KGRound2Message1) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_KGRound2Message1.Unmarshal(m, b)
-}
-func (m *KGRound2Message1) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_KGRound2Message1.Marshal(b, m, deterministic)
-}
-func (m *KGRound2Message1) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_KGRound2Message1.Merge(m, src)
+func (x *KGRound2Message1) Reset() {
+	*x = KGRound2Message1{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_protob_eddsa_keygen_proto_msgTypes[1]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
 }
-func (m *KGRound2Message1) XXX_Size() int {
-	return xxx_messageInfo_KGRound2Message1.Size(m)
+
+func (x *KGRound2Message1) String() string {
+	return protoimpl.X.MessageStringOf(x)
 }
-func (m *KGRound2Message1) XXX_DiscardUnknown() {
-	xxx_messageInfo_KGRound2Message1.DiscardUnknown(m)
+
+func (*KGRound2Message1) ProtoMessage() {}
+
+func (x *KGRound2Message1) ProtoReflect() protoreflect.Message {
+	mi := &file_protob_eddsa_keygen_proto_msgTypes[1]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
 }
 
-var xxx_messageInfo_KGRound2Message1 proto.InternalMessageInfo
+// Deprecated: Use KGRound2Message1.ProtoReflect.Descriptor instead.
+func (*KGRound2Message1) Descriptor() ([]byte, []int) {
+	return file_protob_eddsa_keygen_proto_rawDescGZIP(), []int{1}
+}
 
-func (m *KGRound2Message1) GetShare() []byte {
-	if m != nil {
-		return m.Share
+func (x *KGRound2Message1) GetShare() []byte {
+	if x != nil {
+		return x.Share
 	}
 	return nil
 }
@@ -105,89 +127,187 @@ func (m *KGRound2Message1) GetShare() []byte {
 //
 // Represents a BROADCAST message sent to each party during Round 2 of the EDDSA TSS keygen protocol.
 type KGRound2Message2 struct {
-	DeCommitment         [][]byte `protobuf:"bytes,1,rep,name=de_commitment,json=deCommitment,proto3" json:"de_commitment,omitempty"`
-	ProofAlphaX          []byte   `protobuf:"bytes,2,opt,name=proof_alpha_x,json=proofAlphaX,proto3" json:"proof_alpha_x,omitempty"`
-	ProofAlphaY          []byte   `protobuf:"bytes,3,opt,name=proof_alpha_y,json=proofAlphaY,proto3" json:"proof_alpha_y,omitempty"`
-	ProofT               []byte   `protobuf:"bytes,4,opt,name=proof_t,json=proofT,proto3" json:"proof_t,omitempty"`
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
-}
-
-func (m *KGRound2Message2) Reset()         { *m = KGRound2Message2{} }
-func (m *KGRound2Message2) String() string { return proto.CompactTextString(m) }
-func (*KGRound2Message2) ProtoMessage()    {}
-func (*KGRound2Message2) Descriptor() ([]byte, []int) {
-	return fileDescriptor_87f3b4615ca57212, []int{2}
-}
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
 
-func (m *KGRound2Message2) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_KGRound2Message2.Unmarshal(m, b)
+	DeCommitment [][]byte `protobuf:"bytes,1,rep,name=de_commitment,json=deCommitment,proto3" json:"de_commitment,omitempty"`
+	ProofAlphaX  []byte   `protobuf:"bytes,2,opt,name=proof_alpha_x,json=proofAlphaX,proto3" json:"proof_alpha_x,omitempty"`
+	ProofAlphaY  []byte   `protobuf:"bytes,3,opt,name=proof_alpha_y,json=proofAlphaY,proto3" json:"proof_alpha_y,omitempty"`
+	ProofT       []byte   `protobuf:"bytes,4,opt,name=proof_t,json=proofT,proto3" json:"proof_t,omitempty"`
 }
-func (m *KGRound2Message2) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_KGRound2Message2.Marshal(b, m, deterministic)
-}
-func (m *KGRound2Message2) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_KGRound2Message2.Merge(m, src)
+
+func (x *KGRound2Message2) Reset() {
+	*x = KGRound2Message2{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_protob_eddsa_keygen_proto_msgTypes[2]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
 }
-func (m *KGRound2Message2) XXX_Size() int {
-	return xxx_messageInfo_KGRound2Message2.Size(m)
+
+func (x *KGRound2Message2) String() string {
+	return protoimpl.X.MessageStringOf(x)
 }
-func (m *KGRound2Message2) XXX_DiscardUnknown() {
-	xxx_messageInfo_KGRound2Message2.DiscardUnknown(m)
+
+func (*KGRound2Message2) ProtoMessage() {}
+
+func (x *KGRound2Message2) ProtoReflect() protoreflect.Message {
+	mi := &file_protob_eddsa_keygen_proto_msgTypes[2]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
 }
 
-var xxx_messageInfo_KGRound2Message2 proto.InternalMessageInfo
+// Deprecated: Use KGRound2Message2.ProtoReflect.Descriptor instead.
+func (*KGRound2Message2) Descriptor() ([]byte, []int) {
+	return file_protob_eddsa_keygen_proto_rawDescGZIP(), []int{2}
+}
 
-func (m *KGRound2Message2) GetDeCommitment() [][]byte {
-	if m != nil {
-		return m.DeCommitment
+func (x *KGRound2Message2) GetDeCommitment() [][]byte {
+	if x != nil {
+		return x.DeCommitment
 	}
 	return nil
 }
 
-func (m *KGRound2Message2) GetProofAlphaX() []byte {
-	if m != nil {
-		return m.ProofAlphaX
+func (x *KGRound2Message2) GetProofAlphaX() []byte {
+	if x != nil {
+		return x.ProofAlphaX
 	}
 	return nil
 }
 
-func (m *KGRound2Message2) GetProofAlphaY() []byte {
-	if m != nil {
-		return m.ProofAlphaY
+func (x *KGRound2Message2) GetProofAlphaY() []byte {
+	if x != nil {
+		return x.ProofAlphaY
 	}
 	return nil
 }
 
-func (m *KGRound2Message2) GetProofT() []byte {
-	if m != nil {
-		return m.ProofT
+func (x *KGRound2Message2) GetProofT() []byte {
+	if x != nil {
+		return x.ProofT
 	}
 	return nil
 }
 
-func init() {
-	proto.RegisterType((*KGRound1Message)(nil), "KGRound1Message")
-	proto.RegisterType((*KGRound2Message1)(nil), "KGRound2Message1")
-	proto.RegisterType((*KGRound2Message2)(nil), "KGRound2Message2")
-}
-
-func init() { proto.RegisterFile("eddsa-keygen.proto", fileDescriptor_87f3b4615ca57212) }
-
-var fileDescriptor_87f3b4615ca57212 = []byte{
-	// 200 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0x12, 0x4a, 0x4d, 0x49, 0x29,
-	0x4e, 0xd4, 0xcd, 0x4e, 0xad, 0x4c, 0x4f, 0xcd, 0xd3, 0x2b, 0x28, 0xca, 0x2f, 0xc9, 0x57, 0x32,
-	0xe4, 0xe2, 0xf7, 0x76, 0x0f, 0xca, 0x2f, 0xcd, 0x4b, 0x31, 0xf4, 0x4d, 0x2d, 0x2e, 0x4e, 0x4c,
-	0x4f, 0x15, 0x92, 0xe3, 0xe2, 0x4a, 0xce, 0xcf, 0xcd, 0xcd, 0x2c, 0xc9, 0x4d, 0xcd, 0x2b, 0x91,
-	0x60, 0x54, 0x60, 0xd4, 0xe0, 0x09, 0x42, 0x12, 0x51, 0xd2, 0xe0, 0x12, 0x80, 0x6a, 0x31, 0x82,
-	0x6a, 0x31, 0x14, 0x12, 0xe1, 0x62, 0x2d, 0xce, 0x48, 0x2c, 0x4a, 0x85, 0x2a, 0x87, 0x70, 0x94,
-	0x66, 0x30, 0x62, 0x28, 0x35, 0x12, 0x52, 0xe6, 0xe2, 0x4d, 0x49, 0x8d, 0x47, 0xb1, 0x81, 0x59,
-	0x83, 0x27, 0x88, 0x27, 0x25, 0xd5, 0x19, 0x2e, 0x26, 0xa4, 0xc4, 0xc5, 0x5b, 0x50, 0x94, 0x9f,
-	0x9f, 0x16, 0x9f, 0x98, 0x53, 0x90, 0x91, 0x18, 0x5f, 0x21, 0xc1, 0x04, 0x36, 0x97, 0x1b, 0x2c,
-	0xe8, 0x08, 0x12, 0x8b, 0x40, 0x57, 0x53, 0x29, 0xc1, 0x8c, 0xae, 0x26, 0x52, 0x48, 0x9c, 0x8b,
-	0x1d, 0xa2, 0xa6, 0x44, 0x82, 0x05, 0x2c, 0xcb, 0x06, 0xe6, 0x86, 0x38, 0xf1, 0x45, 0xf1, 0x80,
-	0x43, 0x43, 0x1f, 0x12, 0x1a, 0x49, 0x6c, 0xe0, 0xe0, 0x30, 0x06, 0x04, 0x00, 0x00, 0xff, 0xff,
-	0x61, 0x46, 0xe6, 0x18, 0x24, 0x01, 0x00, 0x00,
+var File_protob_eddsa_keygen_proto protoreflect.FileDescriptor
+
+var file_protob_eddsa_keygen_proto_rawDesc = []byte{
+	0x0a, 0x19, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x62, 0x2f, 0x65, 0x64, 0x64, 0x73, 0x61, 0x2d, 0x6b,
+	0x65, 0x79, 0x67, 0x65, 0x6e, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x12, 0x1b, 0x62, 0x69, 0x6e,
+	0x61, 0x6e, 0x63, 0x65, 0x2e, 0x74, 0x73, 0x73, 0x6c, 0x69, 0x62, 0x2e, 0x65, 0x64, 0x64, 0x73,
+	0x61, 0x2e, 0x6b, 0x65, 0x79, 0x67, 0x65, 0x6e, 0x22, 0x31, 0x0a, 0x0f, 0x4b, 0x47, 0x52, 0x6f,
+	0x75, 0x6e, 0x64, 0x31, 0x4d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x12, 0x1e, 0x0a, 0x0a, 0x63,
+	0x6f, 0x6d, 0x6d, 0x69, 0x74, 0x6d, 0x65, 0x6e, 0x74, 0x18, 0x01, 0x20, 0x01, 0x28, 0x0c, 0x52,
+	0x0a, 0x63, 0x6f, 0x6d, 0x6d, 0x69, 0x74, 0x6d, 0x65, 0x6e, 0x74, 0x22, 0x28, 0x0a, 0x10, 0x4b,
+	0x47, 0x52, 0x6f, 0x75, 0x6e, 0x64, 0x32, 0x4d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x31, 0x12,
+	0x14, 0x0a, 0x05, 0x73, 0x68, 0x61, 0x72, 0x65, 0x18, 0x01, 0x20, 0x01, 0x28, 0x0c, 0x52, 0x05,
+	0x73, 0x68, 0x61, 0x72, 0x65, 0x22, 0x98, 0x01, 0x0a, 0x10, 0x4b, 0x47, 0x52, 0x6f, 0x75, 0x6e,
+	0x64, 0x32, 0x4d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x32, 0x12, 0x23, 0x0a, 0x0d, 0x64, 0x65,
+	0x5f, 0x63, 0x6f, 0x6d, 0x6d, 0x69, 0x74, 0x6d, 0x65, 0x6e, 0x74, 0x18, 0x01, 0x20, 0x03, 0x28,
+	0x0c, 0x52, 0x0c, 0x64, 0x65, 0x43, 0x6f, 0x6d, 0x6d, 0x69, 0x74, 0x6d, 0x65, 0x6e, 0x74, 0x12,
+	0x22, 0x0a, 0x0d, 0x70, 0x72, 0x6f, 0x6f, 0x66, 0x5f, 0x61, 0x6c, 0x70, 0x68, 0x61, 0x5f, 0x78,
+	0x18, 0x02, 0x20, 0x01, 0x28, 0x0c, 0x52, 0x0b, 0x70, 0x72, 0x6f, 0x6f, 0x66, 0x41, 0x6c, 0x70,
+	0x68, 0x61, 0x58, 0x12, 0x22, 0x0a, 0x0d, 0x70, 0x72, 0x6f, 0x6f, 0x66, 0x5f, 0x61, 0x6c, 0x70,
+	0x68, 0x61, 0x5f, 0x79, 0x18, 0x03, 0x20, 0x01, 0x28, 0x0c, 0x52, 0x0b, 0x70, 0x72, 0x6f, 0x6f,
+	0x66, 0x41, 0x6c, 0x70, 0x68, 0x61, 0x59, 0x12, 0x17, 0x0a, 0x07, 0x70, 0x72, 0x6f, 0x6f, 0x66,
+	0x5f, 0x74, 0x18, 0x04, 0x20, 0x01, 0x28, 0x0c, 0x52, 0x06, 0x70, 0x72, 0x6f, 0x6f, 0x66, 0x54,
+	0x42, 0x0e, 0x5a, 0x0c, 0x65, 0x64, 0x64, 0x73, 0x61, 0x2f, 0x6b, 0x65, 0x79, 0x67, 0x65, 0x6e,
+	0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+}
+
+var (
+	file_protob_eddsa_keygen_proto_rawDescOnce sync.Once
+	file_protob_eddsa_keygen_proto_rawDescData = file_protob_eddsa_keygen_proto_rawDesc
+)
+
+func file_protob_eddsa_keygen_proto_rawDescGZIP() []byte {
+	file_protob_eddsa_keygen_proto_rawDescOnce.Do(func() {
+		file_protob_eddsa_keygen_proto_rawDescData = protoimpl.X.CompressGZIP(file_protob_eddsa_keygen_proto_rawDescData)
+	})
+	return file_protob_eddsa_keygen_proto_rawDescData
+}
+
+var file_protob_eddsa_keygen_proto_msgTypes = make([]protoimpl.MessageInfo, 3)
+var file_protob_eddsa_keygen_proto_goTypes = []interface{}{
+	(*KGRound1Message)(nil),  // 0: binance.tsslib.eddsa.keygen.KGRound1Message
+	(*KGRound2Message1)(nil), // 1: binance.tsslib.eddsa.keygen.KGRound2Message1
+	(*KGRound2Message2)(nil), // 2: binance.tsslib.eddsa.keygen.KGRound2Message2
+}
+var file_protob_eddsa_keygen_proto_depIdxs = []int32{
+	0, // [0:0] is the sub-list for method output_type
+	0, // [0:0] is the sub-list for method input_type
+	0, // [0:0] is the sub-list for extension type_name
+	0, // [0:0] is the sub-list for extension extendee
+	0, // [0:0] is the sub-list for field type_name
+}
+
+func init() { file_protob_eddsa_keygen_proto_init() }
+func file_protob_eddsa_keygen_proto_init() {
+	if File_protob_eddsa_keygen_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_protob_eddsa_keygen_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*KGRound1Message); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_protob_eddsa_keygen_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*KGRound2Message1); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_protob_eddsa_keygen_proto_msgTypes[2].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*KGRound2Message2); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_protob_eddsa_keygen_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   3,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_protob_eddsa_keygen_proto_goTypes,
+		DependencyIndexes: file_protob_eddsa_keygen_proto_depIdxs,
+		MessageInfos:      file_protob_eddsa_keygen_proto_msgTypes,
+	}.Build()
+	File_protob_eddsa_keygen_proto = out.File
+	file_protob_eddsa_keygen_proto_rawDesc = nil
+	file_protob_eddsa_keygen_proto_goTypes = nil
+	file_protob_eddsa_keygen_proto_depIdxs = nil
 }
diff --git a/eddsa/keygen/local_party.go b/eddsa/keygen/local_party.go
index ccc2474a..11601e0b 100644
--- a/eddsa/keygen/local_party.go
+++ b/eddsa/keygen/local_party.go
@@ -11,10 +11,10 @@ import (
 	"fmt"
 	"math/big"
 
-	"github.com/binance-chain/tss-lib/common"
-	cmt "github.com/binance-chain/tss-lib/crypto/commitments"
-	"github.com/binance-chain/tss-lib/crypto/vss"
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/common"
+	cmt "github.com/bnb-chain/tss-lib/v2/crypto/commitments"
+	"github.com/bnb-chain/tss-lib/v2/crypto/vss"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 // Implements Party
@@ -32,7 +32,7 @@ type (
 
 		// outbound messaging
 		out chan<- tss.Message
-		end chan<- LocalPartySaveData
+		end chan<- *LocalPartySaveData
 	}
 
 	localMessageStore struct {
@@ -51,6 +51,9 @@ type (
 		vs            vss.Vs
 		shares        vss.Shares
 		deCommitPolyG cmt.HashDeCommitment
+
+		ssid      []byte
+		ssidNonce *big.Int
 	}
 )
 
@@ -58,7 +61,7 @@ type (
 func NewLocalParty(
 	params *tss.Parameters,
 	out chan<- tss.Message,
-	end chan<- LocalPartySaveData,
+	end chan<- *LocalPartySaveData,
 ) tss.Party {
 	partyCount := params.PartyCount()
 	data := NewLocalPartySaveData(partyCount)
diff --git a/eddsa/keygen/local_party_test.go b/eddsa/keygen/local_party_test.go
index bc90e85a..119371f6 100644
--- a/eddsa/keygen/local_party_test.go
+++ b/eddsa/keygen/local_party_test.go
@@ -19,11 +19,11 @@ import (
 	"github.com/ipfs/go-log"
 	"github.com/stretchr/testify/assert"
 
-	"github.com/binance-chain/tss-lib/common"
-	"github.com/binance-chain/tss-lib/crypto"
-	"github.com/binance-chain/tss-lib/crypto/vss"
-	"github.com/binance-chain/tss-lib/test"
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/common"
+	"github.com/bnb-chain/tss-lib/v2/crypto"
+	"github.com/bnb-chain/tss-lib/v2/crypto/vss"
+	"github.com/bnb-chain/tss-lib/v2/test"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 const (
@@ -40,8 +40,6 @@ func setUp(level string) {
 func TestE2EConcurrentAndSaveFixtures(t *testing.T) {
 	setUp("info")
 
-	tss.SetCurve(edwards.Edwards())
-
 	threshold := testThreshold
 	fixtures, pIDs, err := LoadKeygenTestFixtures(testParticipants)
 	if err != nil {
@@ -54,7 +52,7 @@ func TestE2EConcurrentAndSaveFixtures(t *testing.T) {
 
 	errCh := make(chan *tss.Error, len(pIDs))
 	outCh := make(chan tss.Message, len(pIDs))
-	endCh := make(chan LocalPartySaveData, len(pIDs))
+	endCh := make(chan *LocalPartySaveData, len(pIDs))
 
 	updater := test.SharedPartyUpdater
 
@@ -63,7 +61,7 @@ func TestE2EConcurrentAndSaveFixtures(t *testing.T) {
 	// init the parties
 	for i := 0; i < len(pIDs); i++ {
 		var P *LocalParty
-		params := tss.NewParameters(p2pCtx, pIDs[i], len(pIDs), threshold)
+		params := tss.NewParameters(tss.Edwards(), p2pCtx, pIDs[i], len(pIDs), threshold)
 		if i < len(fixtures) {
 			P = NewLocalParty(params, outCh, endCh).(*LocalParty)
 		} else {
@@ -110,7 +108,7 @@ keygen:
 			// .. here comes a workaround to recover this party's index (it was removed from save data)
 			index, err := save.OriginalIndex()
 			assert.NoErrorf(t, err, "should not be an error getting a party's index from save data")
-			tryWriteTestFixtureFile(t, index, save)
+			tryWriteTestFixtureFile(t, index, *save)
 
 			atomic.AddInt32(&ended, 1)
 			if atomic.LoadInt32(&ended) == int32(len(pIDs)) {
@@ -133,17 +131,17 @@ keygen:
 						}
 						pShares = append(pShares, shareStruct)
 					}
-					uj, err := pShares[:threshold+1].ReConstruct()
+					uj, err := pShares[:threshold+1].ReConstruct(tss.Edwards())
 					assert.NoError(t, err, "vss.ReConstruct should not throw error")
 
 					// uG test: u*G[j] == V[0]
 					assert.Equal(t, uj, Pj.temp.ui)
-					uG := crypto.ScalarBaseMult(tss.EC(), uj)
+					uG := crypto.ScalarBaseMult(tss.Edwards(), uj)
 					assert.True(t, uG.Equals(Pj.temp.vs[0]), "ensure u*G[j] == V_0")
 
 					// xj tests: BigXj == xj*G
 					xj := Pj.data.Xi
-					gXj := crypto.ScalarBaseMult(tss.EC(), xj)
+					gXj := crypto.ScalarBaseMult(tss.Edwards(), xj)
 					BigXj := Pj.data.BigXj[j]
 					assert.True(t, BigXj.Equals(gXj), "ensure BigX_j == g^x_j")
 
@@ -151,28 +149,28 @@ keygen:
 					{
 						badShares := pShares[:threshold]
 						badShares[len(badShares)-1].Share.Set(big.NewInt(0))
-						uj, err := pShares[:threshold].ReConstruct()
+						uj, err := pShares[:threshold].ReConstruct(tss.Edwards())
 						assert.NoError(t, err)
 						assert.NotEqual(t, parties[j].temp.ui, uj)
-						BigXjX, BigXjY := tss.EC().ScalarBaseMult(uj.Bytes())
+						BigXjX, BigXjY := tss.Edwards().ScalarBaseMult(uj.Bytes())
 						assert.NotEqual(t, BigXjX, Pj.temp.vs[0].X())
 						assert.NotEqual(t, BigXjY, Pj.temp.vs[0].Y())
 					}
 					u = new(big.Int).Add(u, uj)
 				}
-				u = new(big.Int).Mod(u, tss.EC().Params().N)
+				u = new(big.Int).Mod(u, tss.Edwards().Params().N)
 				scalar := make([]byte, 0, 32)
 				copy(scalar, u.Bytes())
 
 				// build eddsa key pair
 				pkX, pkY := save.EDDSAPub.X(), save.EDDSAPub.Y()
 				pk := edwards.PublicKey{
-					Curve: tss.EC(),
+					Curve: tss.Edwards(),
 					X:     pkX,
 					Y:     pkY,
 				}
 				println("u len: ", len(u.Bytes()))
-				sk, _, err := edwards.PrivKeyFromScalar(u.Bytes())
+				sk, _, err := edwards.PrivKeyFromScalar(common.PadToLengthBytesInPlace(u.Bytes(), 32))
 				if !assert.NoError(t, err) {
 					return
 				}
@@ -182,7 +180,7 @@ keygen:
 
 				// public key tests
 				assert.NotZero(t, u, "u should not be zero")
-				ourPkX, ourPkY := tss.EC().ScalarBaseMult(u.Bytes())
+				ourPkX, ourPkY := tss.Edwards().ScalarBaseMult(u.Bytes())
 				assert.Equal(t, pkX, ourPkX, "pkX should match expected pk derived from u")
 				assert.Equal(t, pkY, ourPkY, "pkY should match expected pk derived from u")
 				t.Log("Public key tests done.")
diff --git a/eddsa/keygen/messages.go b/eddsa/keygen/messages.go
index 8bcfd650..d6667073 100644
--- a/eddsa/keygen/messages.go
+++ b/eddsa/keygen/messages.go
@@ -7,16 +7,15 @@
 package keygen
 
 import (
+	"crypto/elliptic"
 	"math/big"
 
-	"github.com/golang/protobuf/proto"
-
-	"github.com/binance-chain/tss-lib/common"
-	"github.com/binance-chain/tss-lib/crypto"
-	cmt "github.com/binance-chain/tss-lib/crypto/commitments"
-	"github.com/binance-chain/tss-lib/crypto/schnorr"
-	"github.com/binance-chain/tss-lib/crypto/vss"
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/common"
+	"github.com/bnb-chain/tss-lib/v2/crypto"
+	cmt "github.com/bnb-chain/tss-lib/v2/crypto/commitments"
+	"github.com/bnb-chain/tss-lib/v2/crypto/schnorr"
+	"github.com/bnb-chain/tss-lib/v2/crypto/vss"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 // These messages were generated from Protocol Buffers definitions into eddsa-keygen.pb.go
@@ -31,12 +30,6 @@ var (
 	}
 )
 
-func init() {
-	proto.RegisterType((*KGRound1Message)(nil), tss.EDDSAProtoNamePrefix+"keygen.KGRound1Message")
-	proto.RegisterType((*KGRound2Message1)(nil), tss.EDDSAProtoNamePrefix+"keygen.KGRound2Message1")
-	proto.RegisterType((*KGRound2Message2)(nil), tss.EDDSAProtoNamePrefix+"keygen.KGRound2Message2")
-}
-
 // ----- //
 
 func NewKGRound1Message(from *tss.PartyID, ct cmt.HashCommitment) tss.ParsedMessage {
@@ -118,9 +111,9 @@ func (m *KGRound2Message2) UnmarshalDeCommitment() []*big.Int {
 	return cmt.NewHashDeCommitmentFromBytes(deComBzs)
 }
 
-func (m *KGRound2Message2) UnmarshalZKProof() (*schnorr.ZKProof, error) {
+func (m *KGRound2Message2) UnmarshalZKProof(ec elliptic.Curve) (*schnorr.ZKProof, error) {
 	point, err := crypto.NewECPoint(
-		tss.EC(),
+		ec,
 		new(big.Int).SetBytes(m.GetProofAlphaX()),
 		new(big.Int).SetBytes(m.GetProofAlphaY()))
 	if err != nil {
diff --git a/eddsa/keygen/round_1.go b/eddsa/keygen/round_1.go
index 049e6f6e..18ac2c58 100644
--- a/eddsa/keygen/round_1.go
+++ b/eddsa/keygen/round_1.go
@@ -10,11 +10,11 @@ import (
 	"errors"
 	"math/big"
 
-	"github.com/binance-chain/tss-lib/common"
-	"github.com/binance-chain/tss-lib/crypto"
-	cmts "github.com/binance-chain/tss-lib/crypto/commitments"
-	"github.com/binance-chain/tss-lib/crypto/vss"
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/common"
+	"github.com/bnb-chain/tss-lib/v2/crypto"
+	cmts "github.com/bnb-chain/tss-lib/v2/crypto/commitments"
+	"github.com/bnb-chain/tss-lib/v2/crypto/vss"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 var (
@@ -22,7 +22,7 @@ var (
 )
 
 // round 1 represents round 1 of the keygen part of the EDDSA TSS spec
-func newRound1(params *tss.Parameters, save *LocalPartySaveData, temp *localTempData, out chan<- tss.Message, end chan<- LocalPartySaveData) tss.Round {
+func newRound1(params *tss.Parameters, save *LocalPartySaveData, temp *localTempData, out chan<- tss.Message, end chan<- *LocalPartySaveData) tss.Round {
 	return &round1{
 		&base{params, save, temp, out, end, make([]bool, len(params.Parties().IDs())), false, 1}}
 }
@@ -38,13 +38,20 @@ func (round *round1) Start() *tss.Error {
 	Pi := round.PartyID()
 	i := Pi.Index
 
+	round.temp.ssidNonce = new(big.Int).SetUint64(0)
+	ssid, err := round.getSSID()
+	if err != nil {
+		return round.WrapError(err)
+	}
+	round.temp.ssid = ssid
+
 	// 1. calculate "partial" key share ui
-	ui := common.GetRandomPositiveInt(tss.EC().Params().N)
+	ui := common.GetRandomPositiveInt(round.Params().EC().Params().N)
 	round.temp.ui = ui
 
 	// 2. compute the vss shares
 	ids := round.Parties().IDs().Keys()
-	vs, shares, err := vss.Create(round.Threshold(), ui, ids)
+	vs, shares, err := vss.Create(round.Params().EC(), round.Threshold(), ui, ids)
 	if err != nil {
 		return round.WrapError(err, Pi)
 	}
@@ -89,17 +96,19 @@ func (round *round1) CanAccept(msg tss.ParsedMessage) bool {
 }
 
 func (round *round1) Update() (bool, *tss.Error) {
+	ret := true
 	for j, msg := range round.temp.kgRound1Messages {
 		if round.ok[j] {
 			continue
 		}
 		if msg == nil || !round.CanAccept(msg) {
-			return false, nil
+			ret = false
+			continue
 		}
 		// vss check is in round 2
 		round.ok[j] = true
 	}
-	return true, nil
+	return ret, nil
 }
 
 func (round *round1) NextRound() tss.Round {
diff --git a/eddsa/keygen/round_2.go b/eddsa/keygen/round_2.go
index f911a8f1..1e0a4474 100644
--- a/eddsa/keygen/round_2.go
+++ b/eddsa/keygen/round_2.go
@@ -8,11 +8,12 @@ package keygen
 
 import (
 	"errors"
+	"math/big"
 
 	errors2 "github.com/pkg/errors"
 
-	"github.com/binance-chain/tss-lib/crypto/schnorr"
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/crypto/schnorr"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 func (round *round2) Start() *tss.Error {
@@ -45,7 +46,8 @@ func (round *round2) Start() *tss.Error {
 	}
 
 	// 5. compute Schnorr prove
-	pii, err := schnorr.NewZKProof(round.temp.ui, round.temp.vs[0])
+	ContextI := append(round.temp.ssid, new(big.Int).SetUint64(uint64(i)).Bytes()...)
+	pii, err := schnorr.NewZKProof(ContextI, round.temp.ui, round.temp.vs[0])
 	if err != nil {
 		return round.WrapError(errors2.Wrapf(err, "NewZKProof(ui, vi0)"))
 	}
@@ -70,20 +72,23 @@ func (round *round2) CanAccept(msg tss.ParsedMessage) bool {
 
 func (round *round2) Update() (bool, *tss.Error) {
 	// guard - VERIFY de-commit for all Pj
+	ret := true
 	for j, msg := range round.temp.kgRound2Message1s {
 		if round.ok[j] {
 			continue
 		}
 		if msg == nil || !round.CanAccept(msg) {
-			return false, nil
+			ret = false
+			continue
 		}
 		msg2 := round.temp.kgRound2Message2s[j]
 		if msg2 == nil || !round.CanAccept(msg2) {
-			return false, nil
+			ret = false
+			continue
 		}
 		round.ok[j] = true
 	}
-	return true, nil
+	return ret, nil
 }
 
 func (round *round2) NextRound() tss.Round {
diff --git a/eddsa/keygen/round_3.go b/eddsa/keygen/round_3.go
index 2b219a99..476ab3d3 100644
--- a/eddsa/keygen/round_3.go
+++ b/eddsa/keygen/round_3.go
@@ -13,11 +13,11 @@ import (
 	"github.com/hashicorp/go-multierror"
 	errors2 "github.com/pkg/errors"
 
-	"github.com/binance-chain/tss-lib/common"
-	"github.com/binance-chain/tss-lib/crypto"
-	"github.com/binance-chain/tss-lib/crypto/commitments"
-	"github.com/binance-chain/tss-lib/crypto/vss"
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/common"
+	"github.com/bnb-chain/tss-lib/v2/crypto"
+	"github.com/bnb-chain/tss-lib/v2/crypto/commitments"
+	"github.com/bnb-chain/tss-lib/v2/crypto/vss"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 func (round *round3) Start() *tss.Error {
@@ -41,7 +41,7 @@ func (round *round3) Start() *tss.Error {
 		share := r2msg1.UnmarshalShare()
 		xi = new(big.Int).Add(xi, share)
 	}
-	round.save.Xi = new(big.Int).Mod(xi, tss.EC().Params().N)
+	round.save.Xi = new(big.Int).Mod(xi, round.Params().EC().Params().N)
 
 	// 2-3.
 	Vc := make(vss.Vs, round.Threshold()+1)
@@ -65,6 +65,8 @@ func (round *round3) Start() *tss.Error {
 		if j == PIdx {
 			continue
 		}
+		ContextJ := common.AppendBigIntToBytesSlice(round.temp.ssid, big.NewInt(int64(j)))
+
 		// 6-9.
 		go func(j int, ch chan<- vssOut) {
 			// 4-10.
@@ -77,17 +79,22 @@ func (round *round3) Start() *tss.Error {
 				ch <- vssOut{errors.New("de-commitment verify failed"), nil}
 				return
 			}
-			PjVs, err := crypto.UnFlattenECPoints(tss.EC(), flatPolyGs)
+
+			PjVs, err := crypto.UnFlattenECPoints(round.Params().EC(), flatPolyGs)
+			for i, PjV := range PjVs {
+				PjVs[i] = PjV.EightInvEight()
+			}
+
 			if err != nil {
 				ch <- vssOut{err, nil}
 				return
 			}
-			proof, err := r2msg2.UnmarshalZKProof()
+			proof, err := r2msg2.UnmarshalZKProof(round.Params().EC())
 			if err != nil {
 				ch <- vssOut{errors.New("failed to unmarshal schnorr proof"), nil}
 				return
 			}
-			ok = proof.Verify(PjVs[0])
+			ok = proof.Verify(ContextJ, PjVs[0])
 			if !ok {
 				ch <- vssOut{errors.New("failed to prove schnorr proof"), nil}
 				return
@@ -98,7 +105,7 @@ func (round *round3) Start() *tss.Error {
 				ID:        round.PartyID().KeyInt(),
 				Share:     r2msg1.UnmarshalShare(),
 			}
-			if ok = PjShare.Verify(round.Threshold(), PjVs); !ok {
+			if ok = PjShare.Verify(round.Params().EC(), round.Threshold(), PjVs); !ok {
 				ch <- vssOut{errors.New("vss verify failed"), nil}
 				return
 			}
@@ -124,10 +131,9 @@ func (round *round3) Start() *tss.Error {
 		var multiErr error
 		if len(culprits) > 0 {
 			for _, vssResult := range vssResults {
-				if vssResult.unWrappedErr == nil {
-					continue
+				if vssResult.unWrappedErr != nil {
+					multiErr = multierror.Append(multiErr, vssResult.unWrappedErr)
 				}
-				multiErr = multierror.Append(multiErr, vssResult.unWrappedErr)
 			}
 			return round.WrapError(multiErr, culprits...)
 		}
@@ -156,7 +162,7 @@ func (round *round3) Start() *tss.Error {
 	// 13-17. compute Xj for each Pj
 	{
 		var err error
-		modQ := common.ModInt(tss.EC().Params().N)
+		modQ := common.ModInt(round.Params().EC().Params().N)
 		culprits := make([]*tss.PartyID, 0, len(Ps)) // who caused the error(s)
 		bigXj := round.save.BigXj
 		for j := 0; j < round.PartyCount(); j++ {
@@ -180,7 +186,7 @@ func (round *round3) Start() *tss.Error {
 	}
 
 	// 18. compute and SAVE the EDDSA public key `y`
-	eddsaPubKey, err := crypto.NewECPoint(tss.EC(), Vc[0].X(), Vc[0].Y())
+	eddsaPubKey, err := crypto.NewECPoint(round.Params().EC(), Vc[0].X(), Vc[0].Y())
 	if err != nil {
 		return round.WrapError(errors2.Wrapf(err, "public key is not on the curve"))
 	}
@@ -189,7 +195,7 @@ func (round *round3) Start() *tss.Error {
 	// PRINT public key & private share
 	common.Logger.Debugf("%s public key: %x", round.PartyID(), eddsaPubKey)
 
-	round.end <- *round.save
+	round.end <- round.save
 	return nil
 }
 
diff --git a/eddsa/keygen/rounds.go b/eddsa/keygen/rounds.go
index 3cb52f3f..cc880508 100644
--- a/eddsa/keygen/rounds.go
+++ b/eddsa/keygen/rounds.go
@@ -7,7 +7,10 @@
 package keygen
 
 import (
-	"github.com/binance-chain/tss-lib/tss"
+	"math/big"
+
+	"github.com/bnb-chain/tss-lib/v2/common"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 const (
@@ -20,7 +23,7 @@ type (
 		save    *LocalPartySaveData
 		temp    *localTempData
 		out     chan<- tss.Message
-		end     chan<- LocalPartySaveData
+		end     chan<- *LocalPartySaveData
 		ok      []bool // `ok` tracks parties which have been verified by Update()
 		started bool
 		number  int
@@ -82,3 +85,14 @@ func (round *base) resetOK() {
 		round.ok[j] = false
 	}
 }
+
+// get ssid from local params
+func (round *base) getSSID() ([]byte, error) {
+	ssidList := []*big.Int{round.EC().Params().P, round.EC().Params().N, round.EC().Params().Gx, round.EC().Params().Gy} // ec curve
+	ssidList = append(ssidList, round.Parties().IDs().Keys()...)
+	ssidList = append(ssidList, big.NewInt(int64(round.number))) // round number
+	ssidList = append(ssidList, round.temp.ssidNonce)
+	ssid := common.SHA512_256i(ssidList...).Bytes()
+
+	return ssid, nil
+}
diff --git a/eddsa/keygen/save_data.go b/eddsa/keygen/save_data.go
index df131caf..a7be639f 100644
--- a/eddsa/keygen/save_data.go
+++ b/eddsa/keygen/save_data.go
@@ -10,9 +10,8 @@ import (
 	"encoding/hex"
 	"math/big"
 
-	"github.com/binance-chain/tss-lib/common"
-	"github.com/binance-chain/tss-lib/crypto"
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/crypto"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 type (
@@ -54,7 +53,7 @@ func BuildLocalSaveDataSubset(sourceData LocalPartySaveData, sortedIDs tss.Sorte
 	for j, id := range sortedIDs {
 		savedIdx, ok := keysToIndices[hex.EncodeToString(id.Key)]
 		if !ok {
-			common.Logger.Warning("BuildLocalSaveDataSubset: unable to find a signer party in the local save data", id)
+			panic("BuildLocalSaveDataSubset: unable to find a signer party in the local save data")
 		}
 		newData.Ks[j] = sourceData.Ks[savedIdx]
 		newData.BigXj[j] = sourceData.BigXj[savedIdx]
diff --git a/eddsa/keygen/test_utils.go b/eddsa/keygen/test_utils.go
index 5cd70d33..c6d8e985 100644
--- a/eddsa/keygen/test_utils.go
+++ b/eddsa/keygen/test_utils.go
@@ -17,8 +17,8 @@ import (
 
 	"github.com/pkg/errors"
 
-	"github.com/binance-chain/tss-lib/test"
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/test"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 const (
@@ -52,6 +52,10 @@ func LoadKeygenTestFixtures(qty int, optionalStart ...int) ([]LocalPartySaveData
 				"could not unmarshal fixture data for party %d located at: %s",
 				i, fixtureFilePath)
 		}
+		for _, kbxj := range key.BigXj {
+			kbxj.SetCurve(tss.Edwards())
+		}
+		key.EDDSAPub.SetCurve(tss.Edwards())
 		keys = append(keys, key)
 	}
 	partyIDs := make(tss.UnSortedPartyIDs, len(keys))
@@ -86,6 +90,10 @@ func LoadKeygenTestFixturesRandomSet(qty, fixtureCount int) ([]LocalPartySaveDat
 				"could not unmarshal fixture data for party %d located at: %s",
 				i, fixtureFilePath)
 		}
+		for _, kbxj := range key.BigXj {
+			kbxj.SetCurve(tss.Edwards())
+		}
+		key.EDDSAPub.SetCurve(tss.Edwards())
 		keys = append(keys, key)
 	}
 	partyIDs := make(tss.UnSortedPartyIDs, len(keys))
diff --git a/eddsa/resharing/eddsa-resharing.pb.go b/eddsa/resharing/eddsa-resharing.pb.go
index b581313a..25c33ed4 100644
--- a/eddsa/resharing/eddsa-resharing.pb.go
+++ b/eddsa/resharing/eddsa-resharing.pb.go
@@ -1,79 +1,92 @@
+// Copyright © 2019 Binance
+//
+// This file is part of Binance. The full Binance copyright notice, including
+// terms governing use, modification, and redistribution, is contained in the
+// file LICENSE at the root of the source code distribution tree.
+
 // Code generated by protoc-gen-go. DO NOT EDIT.
-// source: eddsa-resharing.proto
+// versions:
+// 	protoc-gen-go v1.27.1
+// 	protoc        v3.14.0
+// source: protob/eddsa-resharing.proto
 
 package resharing
 
 import (
-	fmt "fmt"
-	math "math"
-
-	proto "github.com/golang/protobuf/proto"
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
 )
 
-// Reference imports to suppress errors if they are not otherwise used.
-var _ = proto.Marshal
-var _ = fmt.Errorf
-var _ = math.Inf
-
-// This is a compile-time assertion to ensure that this generated file
-// is compatible with the proto package it is being compiled against.
-// A compilation error at this line likely means your copy of the
-// proto package needs to be updated.
-const _ = proto.ProtoPackageIsVersion3 // please upgrade the proto package
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
 
 //
 // The Round 1 data is broadcast to peers of the New Committee in this message.
 type DGRound1Message struct {
-	EddsaPubX            []byte   `protobuf:"bytes,1,opt,name=eddsa_pub_x,json=eddsaPubX,proto3" json:"eddsa_pub_x,omitempty"`
-	EddsaPubY            []byte   `protobuf:"bytes,2,opt,name=eddsa_pub_y,json=eddsaPubY,proto3" json:"eddsa_pub_y,omitempty"`
-	VCommitment          []byte   `protobuf:"bytes,3,opt,name=v_commitment,json=vCommitment,proto3" json:"v_commitment,omitempty"`
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
-}
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
 
-func (m *DGRound1Message) Reset()         { *m = DGRound1Message{} }
-func (m *DGRound1Message) String() string { return proto.CompactTextString(m) }
-func (*DGRound1Message) ProtoMessage()    {}
-func (*DGRound1Message) Descriptor() ([]byte, []int) {
-	return fileDescriptor_d6ac4d7ec55a8fe1, []int{0}
+	EddsaPubX   []byte `protobuf:"bytes,1,opt,name=eddsa_pub_x,json=eddsaPubX,proto3" json:"eddsa_pub_x,omitempty"`
+	EddsaPubY   []byte `protobuf:"bytes,2,opt,name=eddsa_pub_y,json=eddsaPubY,proto3" json:"eddsa_pub_y,omitempty"`
+	VCommitment []byte `protobuf:"bytes,3,opt,name=v_commitment,json=vCommitment,proto3" json:"v_commitment,omitempty"`
 }
 
-func (m *DGRound1Message) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_DGRound1Message.Unmarshal(m, b)
-}
-func (m *DGRound1Message) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_DGRound1Message.Marshal(b, m, deterministic)
-}
-func (m *DGRound1Message) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_DGRound1Message.Merge(m, src)
+func (x *DGRound1Message) Reset() {
+	*x = DGRound1Message{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_protob_eddsa_resharing_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
 }
-func (m *DGRound1Message) XXX_Size() int {
-	return xxx_messageInfo_DGRound1Message.Size(m)
+
+func (x *DGRound1Message) String() string {
+	return protoimpl.X.MessageStringOf(x)
 }
-func (m *DGRound1Message) XXX_DiscardUnknown() {
-	xxx_messageInfo_DGRound1Message.DiscardUnknown(m)
+
+func (*DGRound1Message) ProtoMessage() {}
+
+func (x *DGRound1Message) ProtoReflect() protoreflect.Message {
+	mi := &file_protob_eddsa_resharing_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
 }
 
-var xxx_messageInfo_DGRound1Message proto.InternalMessageInfo
+// Deprecated: Use DGRound1Message.ProtoReflect.Descriptor instead.
+func (*DGRound1Message) Descriptor() ([]byte, []int) {
+	return file_protob_eddsa_resharing_proto_rawDescGZIP(), []int{0}
+}
 
-func (m *DGRound1Message) GetEddsaPubX() []byte {
-	if m != nil {
-		return m.EddsaPubX
+func (x *DGRound1Message) GetEddsaPubX() []byte {
+	if x != nil {
+		return x.EddsaPubX
 	}
 	return nil
 }
 
-func (m *DGRound1Message) GetEddsaPubY() []byte {
-	if m != nil {
-		return m.EddsaPubY
+func (x *DGRound1Message) GetEddsaPubY() []byte {
+	if x != nil {
+		return x.EddsaPubY
 	}
 	return nil
 }
 
-func (m *DGRound1Message) GetVCommitment() []byte {
-	if m != nil {
-		return m.VCommitment
+func (x *DGRound1Message) GetVCommitment() []byte {
+	if x != nil {
+		return x.VCommitment
 	}
 	return nil
 }
@@ -81,73 +94,88 @@ func (m *DGRound1Message) GetVCommitment() []byte {
 //
 // The Round 2 "ACK" is broadcast to peers of the Old Committee in this message.
 type DGRound2Message struct {
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
 }
 
-func (m *DGRound2Message) Reset()         { *m = DGRound2Message{} }
-func (m *DGRound2Message) String() string { return proto.CompactTextString(m) }
-func (*DGRound2Message) ProtoMessage()    {}
-func (*DGRound2Message) Descriptor() ([]byte, []int) {
-	return fileDescriptor_d6ac4d7ec55a8fe1, []int{1}
+func (x *DGRound2Message) Reset() {
+	*x = DGRound2Message{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_protob_eddsa_resharing_proto_msgTypes[1]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
 }
 
-func (m *DGRound2Message) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_DGRound2Message2.Unmarshal(m, b)
-}
-func (m *DGRound2Message) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_DGRound2Message2.Marshal(b, m, deterministic)
+func (x *DGRound2Message) String() string {
+	return protoimpl.X.MessageStringOf(x)
 }
-func (m *DGRound2Message) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_DGRound2Message2.Merge(m, src)
-}
-func (m *DGRound2Message) XXX_Size() int {
-	return xxx_messageInfo_DGRound2Message2.Size(m)
-}
-func (m *DGRound2Message) XXX_DiscardUnknown() {
-	xxx_messageInfo_DGRound2Message2.DiscardUnknown(m)
+
+func (*DGRound2Message) ProtoMessage() {}
+
+func (x *DGRound2Message) ProtoReflect() protoreflect.Message {
+	mi := &file_protob_eddsa_resharing_proto_msgTypes[1]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
 }
 
-var xxx_messageInfo_DGRound2Message2 proto.InternalMessageInfo
+// Deprecated: Use DGRound2Message.ProtoReflect.Descriptor instead.
+func (*DGRound2Message) Descriptor() ([]byte, []int) {
+	return file_protob_eddsa_resharing_proto_rawDescGZIP(), []int{1}
+}
 
 //
 // The Round 3 data is sent to peers of the New Committee in this message.
 type DGRound3Message1 struct {
-	Share                []byte   `protobuf:"bytes,1,opt,name=share,proto3" json:"share,omitempty"`
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
-}
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
 
-func (m *DGRound3Message1) Reset()         { *m = DGRound3Message1{} }
-func (m *DGRound3Message1) String() string { return proto.CompactTextString(m) }
-func (*DGRound3Message1) ProtoMessage()    {}
-func (*DGRound3Message1) Descriptor() ([]byte, []int) {
-	return fileDescriptor_d6ac4d7ec55a8fe1, []int{2}
+	Share []byte `protobuf:"bytes,1,opt,name=share,proto3" json:"share,omitempty"`
 }
 
-func (m *DGRound3Message1) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_DGRound3Message1.Unmarshal(m, b)
-}
-func (m *DGRound3Message1) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_DGRound3Message1.Marshal(b, m, deterministic)
-}
-func (m *DGRound3Message1) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_DGRound3Message1.Merge(m, src)
+func (x *DGRound3Message1) Reset() {
+	*x = DGRound3Message1{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_protob_eddsa_resharing_proto_msgTypes[2]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
 }
-func (m *DGRound3Message1) XXX_Size() int {
-	return xxx_messageInfo_DGRound3Message1.Size(m)
+
+func (x *DGRound3Message1) String() string {
+	return protoimpl.X.MessageStringOf(x)
 }
-func (m *DGRound3Message1) XXX_DiscardUnknown() {
-	xxx_messageInfo_DGRound3Message1.DiscardUnknown(m)
+
+func (*DGRound3Message1) ProtoMessage() {}
+
+func (x *DGRound3Message1) ProtoReflect() protoreflect.Message {
+	mi := &file_protob_eddsa_resharing_proto_msgTypes[2]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
 }
 
-var xxx_messageInfo_DGRound3Message1 proto.InternalMessageInfo
+// Deprecated: Use DGRound3Message1.ProtoReflect.Descriptor instead.
+func (*DGRound3Message1) Descriptor() ([]byte, []int) {
+	return file_protob_eddsa_resharing_proto_rawDescGZIP(), []int{2}
+}
 
-func (m *DGRound3Message1) GetShare() []byte {
-	if m != nil {
-		return m.Share
+func (x *DGRound3Message1) GetShare() []byte {
+	if x != nil {
+		return x.Share
 	}
 	return nil
 }
@@ -155,40 +183,48 @@ func (m *DGRound3Message1) GetShare() []byte {
 //
 // The Round 3 data is broadcast to peers of the New Committee in this message.
 type DGRound3Message2 struct {
-	VDecommitment        [][]byte `protobuf:"bytes,1,rep,name=v_decommitment,json=vDecommitment,proto3" json:"v_decommitment,omitempty"`
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
-}
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
 
-func (m *DGRound3Message2) Reset()         { *m = DGRound3Message2{} }
-func (m *DGRound3Message2) String() string { return proto.CompactTextString(m) }
-func (*DGRound3Message2) ProtoMessage()    {}
-func (*DGRound3Message2) Descriptor() ([]byte, []int) {
-	return fileDescriptor_d6ac4d7ec55a8fe1, []int{3}
+	VDecommitment [][]byte `protobuf:"bytes,1,rep,name=v_decommitment,json=vDecommitment,proto3" json:"v_decommitment,omitempty"`
 }
 
-func (m *DGRound3Message2) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_DGRound3Message2.Unmarshal(m, b)
-}
-func (m *DGRound3Message2) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_DGRound3Message2.Marshal(b, m, deterministic)
-}
-func (m *DGRound3Message2) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_DGRound3Message2.Merge(m, src)
+func (x *DGRound3Message2) Reset() {
+	*x = DGRound3Message2{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_protob_eddsa_resharing_proto_msgTypes[3]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
 }
-func (m *DGRound3Message2) XXX_Size() int {
-	return xxx_messageInfo_DGRound3Message2.Size(m)
+
+func (x *DGRound3Message2) String() string {
+	return protoimpl.X.MessageStringOf(x)
 }
-func (m *DGRound3Message2) XXX_DiscardUnknown() {
-	xxx_messageInfo_DGRound3Message2.DiscardUnknown(m)
+
+func (*DGRound3Message2) ProtoMessage() {}
+
+func (x *DGRound3Message2) ProtoReflect() protoreflect.Message {
+	mi := &file_protob_eddsa_resharing_proto_msgTypes[3]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
 }
 
-var xxx_messageInfo_DGRound3Message2 proto.InternalMessageInfo
+// Deprecated: Use DGRound3Message2.ProtoReflect.Descriptor instead.
+func (*DGRound3Message2) Descriptor() ([]byte, []int) {
+	return file_protob_eddsa_resharing_proto_rawDescGZIP(), []int{3}
+}
 
-func (m *DGRound3Message2) GetVDecommitment() [][]byte {
-	if m != nil {
-		return m.VDecommitment
+func (x *DGRound3Message2) GetVDecommitment() [][]byte {
+	if x != nil {
+		return x.VDecommitment
 	}
 	return nil
 }
@@ -196,59 +232,181 @@ func (m *DGRound3Message2) GetVDecommitment() [][]byte {
 //
 // The Round 4 "ACK" is broadcast to peers of the Old and New Committees from the New Committee in this message.
 type DGRound4Message struct {
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
 }
 
-func (m *DGRound4Message) Reset()         { *m = DGRound4Message{} }
-func (m *DGRound4Message) String() string { return proto.CompactTextString(m) }
-func (*DGRound4Message) ProtoMessage()    {}
-func (*DGRound4Message) Descriptor() ([]byte, []int) {
-	return fileDescriptor_d6ac4d7ec55a8fe1, []int{4}
+func (x *DGRound4Message) Reset() {
+	*x = DGRound4Message{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_protob_eddsa_resharing_proto_msgTypes[4]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
 }
 
-func (m *DGRound4Message) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_DGRound4Message.Unmarshal(m, b)
-}
-func (m *DGRound4Message) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_DGRound4Message.Marshal(b, m, deterministic)
-}
-func (m *DGRound4Message) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_DGRound4Message.Merge(m, src)
-}
-func (m *DGRound4Message) XXX_Size() int {
-	return xxx_messageInfo_DGRound4Message.Size(m)
-}
-func (m *DGRound4Message) XXX_DiscardUnknown() {
-	xxx_messageInfo_DGRound4Message.DiscardUnknown(m)
+func (x *DGRound4Message) String() string {
+	return protoimpl.X.MessageStringOf(x)
 }
 
-var xxx_messageInfo_DGRound4Message proto.InternalMessageInfo
+func (*DGRound4Message) ProtoMessage() {}
 
-func init() {
-	proto.RegisterType((*DGRound1Message)(nil), "DGRound1Message")
-	proto.RegisterType((*DGRound2Message)(nil), "DGRound2Message")
-	proto.RegisterType((*DGRound3Message1)(nil), "DGRound3Message1")
-	proto.RegisterType((*DGRound3Message2)(nil), "DGRound3Message2")
-	proto.RegisterType((*DGRound4Message)(nil), "DGRound4Message")
+func (x *DGRound4Message) ProtoReflect() protoreflect.Message {
+	mi := &file_protob_eddsa_resharing_proto_msgTypes[4]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
 }
 
-func init() { proto.RegisterFile("eddsa-resharing.proto", fileDescriptor_d6ac4d7ec55a8fe1) }
+// Deprecated: Use DGRound4Message.ProtoReflect.Descriptor instead.
+func (*DGRound4Message) Descriptor() ([]byte, []int) {
+	return file_protob_eddsa_resharing_proto_rawDescGZIP(), []int{4}
+}
+
+var File_protob_eddsa_resharing_proto protoreflect.FileDescriptor
+
+var file_protob_eddsa_resharing_proto_rawDesc = []byte{
+	0x0a, 0x1c, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x62, 0x2f, 0x65, 0x64, 0x64, 0x73, 0x61, 0x2d, 0x72,
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+	0x6e, 0x67, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+}
+
+var (
+	file_protob_eddsa_resharing_proto_rawDescOnce sync.Once
+	file_protob_eddsa_resharing_proto_rawDescData = file_protob_eddsa_resharing_proto_rawDesc
+)
 
-var fileDescriptor_d6ac4d7ec55a8fe1 = []byte{
-	// 203 bytes of a gzipped FileDescriptorProto
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-	0x66, 0x96, 0xe4, 0xa6, 0xe6, 0x95, 0x48, 0x30, 0x83, 0x15, 0x70, 0x97, 0x39, 0xc3, 0x85, 0x94,
-	0x84, 0xb8, 0x04, 0xa0, 0xb6, 0x1a, 0x41, 0x6d, 0x35, 0x52, 0xd2, 0x80, 0x8b, 0x19, 0x43, 0xc5,
-	0x0c, 0x85, 0x44, 0xb8, 0x58, 0x41, 0xce, 0x4d, 0x85, 0x3a, 0x02, 0xc2, 0x51, 0xb2, 0xc4, 0x50,
-	0x69, 0x24, 0xa4, 0xca, 0xc5, 0x57, 0x16, 0x9f, 0x92, 0x8a, 0x64, 0x2d, 0xa3, 0x02, 0xb3, 0x06,
-	0x4f, 0x10, 0x6f, 0x99, 0x0b, 0x92, 0xa0, 0x92, 0x20, 0xdc, 0xbb, 0x26, 0x50, 0xad, 0x4e, 0x82,
-	0x51, 0xfc, 0x60, 0xb7, 0xeb, 0xc3, 0x83, 0x26, 0x89, 0x0d, 0x1c, 0x36, 0xc6, 0x80, 0x00, 0x00,
-	0x00, 0xff, 0xff, 0x76, 0xdf, 0xde, 0x85, 0x34, 0x01, 0x00, 0x00,
+func file_protob_eddsa_resharing_proto_rawDescGZIP() []byte {
+	file_protob_eddsa_resharing_proto_rawDescOnce.Do(func() {
+		file_protob_eddsa_resharing_proto_rawDescData = protoimpl.X.CompressGZIP(file_protob_eddsa_resharing_proto_rawDescData)
+	})
+	return file_protob_eddsa_resharing_proto_rawDescData
+}
+
+var file_protob_eddsa_resharing_proto_msgTypes = make([]protoimpl.MessageInfo, 5)
+var file_protob_eddsa_resharing_proto_goTypes = []interface{}{
+	(*DGRound1Message)(nil),  // 0: binance.tsslib.eddsa.resharing.DGRound1Message
+	(*DGRound2Message)(nil),  // 1: binance.tsslib.eddsa.resharing.DGRound2Message
+	(*DGRound3Message1)(nil), // 2: binance.tsslib.eddsa.resharing.DGRound3Message1
+	(*DGRound3Message2)(nil), // 3: binance.tsslib.eddsa.resharing.DGRound3Message2
+	(*DGRound4Message)(nil),  // 4: binance.tsslib.eddsa.resharing.DGRound4Message
+}
+var file_protob_eddsa_resharing_proto_depIdxs = []int32{
+	0, // [0:0] is the sub-list for method output_type
+	0, // [0:0] is the sub-list for method input_type
+	0, // [0:0] is the sub-list for extension type_name
+	0, // [0:0] is the sub-list for extension extendee
+	0, // [0:0] is the sub-list for field type_name
+}
+
+func init() { file_protob_eddsa_resharing_proto_init() }
+func file_protob_eddsa_resharing_proto_init() {
+	if File_protob_eddsa_resharing_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_protob_eddsa_resharing_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*DGRound1Message); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_protob_eddsa_resharing_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*DGRound2Message); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_protob_eddsa_resharing_proto_msgTypes[2].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*DGRound3Message1); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_protob_eddsa_resharing_proto_msgTypes[3].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*DGRound3Message2); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_protob_eddsa_resharing_proto_msgTypes[4].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*DGRound4Message); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_protob_eddsa_resharing_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   5,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_protob_eddsa_resharing_proto_goTypes,
+		DependencyIndexes: file_protob_eddsa_resharing_proto_depIdxs,
+		MessageInfos:      file_protob_eddsa_resharing_proto_msgTypes,
+	}.Build()
+	File_protob_eddsa_resharing_proto = out.File
+	file_protob_eddsa_resharing_proto_rawDesc = nil
+	file_protob_eddsa_resharing_proto_goTypes = nil
+	file_protob_eddsa_resharing_proto_depIdxs = nil
 }
diff --git a/eddsa/resharing/local_party.go b/eddsa/resharing/local_party.go
index 2b7b7469..5e7aebf9 100644
--- a/eddsa/resharing/local_party.go
+++ b/eddsa/resharing/local_party.go
@@ -10,12 +10,12 @@ import (
 	"fmt"
 	"math/big"
 
-	"github.com/binance-chain/tss-lib/common"
-	"github.com/binance-chain/tss-lib/crypto"
-	cmt "github.com/binance-chain/tss-lib/crypto/commitments"
-	"github.com/binance-chain/tss-lib/crypto/vss"
-	"github.com/binance-chain/tss-lib/eddsa/keygen"
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/common"
+	"github.com/bnb-chain/tss-lib/v2/crypto"
+	cmt "github.com/bnb-chain/tss-lib/v2/crypto/commitments"
+	"github.com/bnb-chain/tss-lib/v2/crypto/vss"
+	"github.com/bnb-chain/tss-lib/v2/eddsa/keygen"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 // Implements Party
@@ -33,7 +33,7 @@ type (
 
 		// outbound messaging
 		out chan<- tss.Message
-		end chan<- keygen.LocalPartySaveData
+		end chan<- *keygen.LocalPartySaveData
 	}
 
 	localMessageStore struct {
@@ -67,7 +67,7 @@ func NewLocalParty(
 	params *tss.ReSharingParameters,
 	key keygen.LocalPartySaveData,
 	out chan<- tss.Message,
-	end chan<- keygen.LocalPartySaveData,
+	end chan<- *keygen.LocalPartySaveData,
 ) tss.Party {
 	oldPartyCount := len(params.OldParties().IDs())
 	subset := key
diff --git a/eddsa/resharing/local_party_test.go b/eddsa/resharing/local_party_test.go
index 3a33db37..72411c0c 100644
--- a/eddsa/resharing/local_party_test.go
+++ b/eddsa/resharing/local_party_test.go
@@ -15,13 +15,13 @@ import (
 	"github.com/ipfs/go-log"
 	"github.com/stretchr/testify/assert"
 
-	"github.com/binance-chain/tss-lib/common"
-	"github.com/binance-chain/tss-lib/crypto"
-	"github.com/binance-chain/tss-lib/eddsa/keygen"
-	. "github.com/binance-chain/tss-lib/eddsa/resharing"
-	"github.com/binance-chain/tss-lib/eddsa/signing"
-	"github.com/binance-chain/tss-lib/test"
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/common"
+	"github.com/bnb-chain/tss-lib/v2/crypto"
+	"github.com/bnb-chain/tss-lib/v2/eddsa/keygen"
+	. "github.com/bnb-chain/tss-lib/v2/eddsa/resharing"
+	"github.com/bnb-chain/tss-lib/v2/eddsa/signing"
+	"github.com/bnb-chain/tss-lib/v2/test"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 const (
@@ -33,17 +33,18 @@ func setUp(level string) {
 	if err := log.SetLogLevel("tss-lib", level); err != nil {
 		panic(err)
 	}
+
+	// only for test
+	tss.SetCurve(tss.Edwards())
 }
 
 func TestE2EConcurrent(t *testing.T) {
 	setUp("info")
 
-	tss.SetCurve(edwards.Edwards())
-
 	threshold, newThreshold := testThreshold, testThreshold
 
 	// PHASE: load keygen fixtures
-	firstPartyIdx, extraParties := 5, 1 // // extra can be 0 to N-first
+	firstPartyIdx, extraParties := 1, 1 // // extra can be 0 to N-first
 	oldKeys, oldPIDs, err := keygen.LoadKeygenTestFixtures(testThreshold+1+extraParties+firstPartyIdx, firstPartyIdx)
 	assert.NoError(t, err, "should load keygen fixtures")
 
@@ -61,20 +62,20 @@ func TestE2EConcurrent(t *testing.T) {
 
 	errCh := make(chan *tss.Error, bothCommitteesPax)
 	outCh := make(chan tss.Message, bothCommitteesPax)
-	endCh := make(chan keygen.LocalPartySaveData, bothCommitteesPax)
+	endCh := make(chan *keygen.LocalPartySaveData, bothCommitteesPax)
 
 	updater := test.SharedPartyUpdater
 
 	// init the old parties first
 	for j, pID := range oldPIDs {
-		params := tss.NewReSharingParameters(oldP2PCtx, newP2PCtx, pID, testParticipants, threshold, newPCount, newThreshold)
+		params := tss.NewReSharingParameters(tss.Edwards(), oldP2PCtx, newP2PCtx, pID, testParticipants, threshold, newPCount, newThreshold)
 		P := NewLocalParty(params, oldKeys[j], outCh, endCh).(*LocalParty) // discard old key data
 		oldCommittee = append(oldCommittee, P)
 	}
 
 	// init the new parties
 	for _, pID := range newPIDs {
-		params := tss.NewReSharingParameters(oldP2PCtx, newP2PCtx, pID, testParticipants, threshold, newPCount, newThreshold)
+		params := tss.NewReSharingParameters(tss.Edwards(), oldP2PCtx, newP2PCtx, pID, testParticipants, threshold, newPCount, newThreshold)
 		save := keygen.NewLocalPartySaveData(newPCount)
 		P := NewLocalParty(params, save, outCh, endCh).(*LocalParty)
 		newCommittee = append(newCommittee, P)
@@ -128,7 +129,7 @@ func TestE2EConcurrent(t *testing.T) {
 			if save.Xi != nil {
 				index, err := save.OriginalIndex()
 				assert.NoErrorf(t, err, "should not be an error getting a party's index from save data")
-				newKeys[index] = save
+				newKeys[index] = *save
 			} else {
 				endedOldCommittee++
 			}
@@ -141,7 +142,7 @@ func TestE2EConcurrent(t *testing.T) {
 				for j, key := range newKeys {
 					// xj test: BigXj == xj*G
 					xj := key.Xi
-					gXj := crypto.ScalarBaseMult(tss.EC(), xj)
+					gXj := crypto.ScalarBaseMult(tss.Edwards(), xj)
 					BigXj := key.BigXj[j]
 					assert.True(t, BigXj.Equals(gXj), "ensure BigX_j == g^x_j")
 				}
@@ -160,10 +161,10 @@ signing:
 
 	signErrCh := make(chan *tss.Error, len(signPIDs))
 	signOutCh := make(chan tss.Message, len(signPIDs))
-	signEndCh := make(chan common.SignatureData, len(signPIDs))
+	signEndCh := make(chan *common.SignatureData, len(signPIDs))
 
 	for j, signPID := range signPIDs {
-		params := tss.NewParameters(signP2pCtx, signPID, len(signPIDs), newThreshold)
+		params := tss.NewParameters(tss.Edwards(), signP2pCtx, signPID, len(signPIDs), newThreshold)
 		P := signing.NewLocalParty(big.NewInt(42), params, signKeys[j], signOutCh, signEndCh).(*signing.LocalParty)
 		signParties = append(signParties, P)
 		go func(P *signing.LocalParty) {
@@ -205,7 +206,7 @@ signing:
 				// BEGIN EDDSA verify
 				pkX, pkY := signKeys[0].EDDSAPub.X(), signKeys[0].EDDSAPub.Y()
 				pk := edwards.PublicKey{
-					Curve: tss.EC(),
+					Curve: tss.Edwards(),
 					X:     pkX,
 					Y:     pkY,
 				}
diff --git a/eddsa/resharing/messages.go b/eddsa/resharing/messages.go
index ccc7733c..abf45bb4 100644
--- a/eddsa/resharing/messages.go
+++ b/eddsa/resharing/messages.go
@@ -7,15 +7,14 @@
 package resharing
 
 import (
+	"crypto/elliptic"
 	"math/big"
 
-	"github.com/golang/protobuf/proto"
-
-	"github.com/binance-chain/tss-lib/common"
-	"github.com/binance-chain/tss-lib/crypto"
-	cmt "github.com/binance-chain/tss-lib/crypto/commitments"
-	"github.com/binance-chain/tss-lib/crypto/vss"
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/common"
+	"github.com/bnb-chain/tss-lib/v2/crypto"
+	cmt "github.com/bnb-chain/tss-lib/v2/crypto/commitments"
+	"github.com/bnb-chain/tss-lib/v2/crypto/vss"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 // These messages were generated from Protocol Buffers definitions into eddsa-resharing.pb.go
@@ -27,17 +26,10 @@ var (
 		(*DGRound2Message)(nil),
 		(*DGRound3Message1)(nil),
 		(*DGRound3Message2)(nil),
+		(*DGRound4Message)(nil),
 	}
 )
 
-func init() {
-	proto.RegisterType((*DGRound1Message)(nil), tss.EDDSAProtoNamePrefix+"resharing.DGRound1Message")
-	proto.RegisterType((*DGRound2Message)(nil), tss.EDDSAProtoNamePrefix+"resharing.DGRound2Message")
-	proto.RegisterType((*DGRound3Message1)(nil), tss.EDDSAProtoNamePrefix+"resharing.DGRound3Message1")
-	proto.RegisterType((*DGRound3Message2)(nil), tss.EDDSAProtoNamePrefix+"resharing.DGRound3Message2")
-	proto.RegisterType((*DGRound4Message)(nil), tss.EDDSAProtoNamePrefix+"resharing.DGRound4Message")
-}
-
 // ----- //
 
 func NewDGRound1Message(
@@ -68,9 +60,9 @@ func (m *DGRound1Message) ValidateBasic() bool {
 		common.NonEmptyBytes(m.VCommitment)
 }
 
-func (m *DGRound1Message) UnmarshalEDDSAPub() (*crypto.ECPoint, error) {
+func (m *DGRound1Message) UnmarshalEDDSAPub(ec elliptic.Curve) (*crypto.ECPoint, error) {
 	return crypto.NewECPoint(
-		tss.EC(),
+		ec,
 		new(big.Int).SetBytes(m.EddsaPubX),
 		new(big.Int).SetBytes(m.EddsaPubY))
 }
diff --git a/eddsa/resharing/round_1_old_step_1.go b/eddsa/resharing/round_1_old_step_1.go
index 56fb4351..61bac309 100644
--- a/eddsa/resharing/round_1_old_step_1.go
+++ b/eddsa/resharing/round_1_old_step_1.go
@@ -10,16 +10,16 @@ import (
 	"errors"
 	"fmt"
 
-	"github.com/binance-chain/tss-lib/crypto"
-	"github.com/binance-chain/tss-lib/crypto/commitments"
-	"github.com/binance-chain/tss-lib/crypto/vss"
-	"github.com/binance-chain/tss-lib/eddsa/keygen"
-	"github.com/binance-chain/tss-lib/eddsa/signing"
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/crypto"
+	"github.com/bnb-chain/tss-lib/v2/crypto/commitments"
+	"github.com/bnb-chain/tss-lib/v2/crypto/vss"
+	"github.com/bnb-chain/tss-lib/v2/eddsa/keygen"
+	"github.com/bnb-chain/tss-lib/v2/eddsa/signing"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 // round 1 represents round 1 of the keygen part of the EDDSA TSS spec
-func newRound1(params *tss.ReSharingParameters, input, save *keygen.LocalPartySaveData, temp *localTempData, out chan<- tss.Message, end chan<- keygen.LocalPartySaveData) tss.Round {
+func newRound1(params *tss.ReSharingParameters, input, save *keygen.LocalPartySaveData, temp *localTempData, out chan<- tss.Message, end chan<- *keygen.LocalPartySaveData) tss.Round {
 	return &round1{
 		&base{params, temp, input, save, out, end, make([]bool, len(params.OldParties().IDs())), make([]bool, len(params.NewParties().IDs())), false, 1}}
 }
@@ -47,10 +47,10 @@ func (round *round1) Start() *tss.Error {
 		return round.WrapError(fmt.Errorf("t+1=%d is not satisfied by the key count of %d", round.Threshold()+1, len(ks)), round.PartyID())
 	}
 	newKs := round.NewParties().IDs().Keys()
-	wi := signing.PrepareForSigning(i, len(round.OldParties().IDs()), xi, ks)
+	wi := signing.PrepareForSigning(round.Params().EC(), i, len(round.OldParties().IDs()), xi, ks)
 
 	// 2.
-	vi, shares, err := vss.Create(round.NewThreshold(), wi, newKs)
+	vi, shares, err := vss.Create(round.Params().EC(), round.NewThreshold(), wi, newKs)
 	if err != nil {
 		return round.WrapError(err, round.PartyID())
 	}
@@ -90,18 +90,24 @@ func (round *round1) Update() (bool, *tss.Error) {
 		return true, nil
 	}
 	// accept messages from old -> new committee
+	ret := true
 	for j, msg := range round.temp.dgRound1Messages {
 		if round.oldOK[j] {
 			continue
 		}
 		if msg == nil || !round.CanAccept(msg) {
-			return false, nil
+			ret = false
+			continue
 		}
 		round.oldOK[j] = true
 
+		if round.temp.dgRound1Messages[0] == nil {
+			ret = false
+			continue
+		}
 		// save the eddsa pub received from the old committee
 		r1msg := round.temp.dgRound1Messages[0].Content().(*DGRound1Message)
-		candidate, err := r1msg.UnmarshalEDDSAPub()
+		candidate, err := r1msg.UnmarshalEDDSAPub(round.Params().EC())
 		if err != nil {
 			return false, round.WrapError(errors.New("unable to unmarshal the eddsa pub key"), msg.GetFrom())
 		}
@@ -112,7 +118,7 @@ func (round *round1) Update() (bool, *tss.Error) {
 		}
 		round.save.EDDSAPub = candidate
 	}
-	return true, nil
+	return ret, nil
 }
 
 func (round *round1) NextRound() tss.Round {
diff --git a/eddsa/resharing/round_2_new_step_1.go b/eddsa/resharing/round_2_new_step_1.go
index c323bfb0..703d154a 100644
--- a/eddsa/resharing/round_2_new_step_1.go
+++ b/eddsa/resharing/round_2_new_step_1.go
@@ -9,7 +9,7 @@ package resharing
 import (
 	"errors"
 
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 func (round *round2) Start() *tss.Error {
@@ -50,18 +50,20 @@ func (round *round2) Update() (bool, *tss.Error) {
 		return true, nil
 	}
 
+	ret := true
 	// accept messages from new -> old committee
 	for j, msg := range round.temp.dgRound2Messages {
 		if round.newOK[j] {
 			continue
 		}
 		if msg == nil || !round.CanAccept(msg) {
-			return false, nil
+			ret = false
+			continue
 		}
 		round.newOK[j] = true
 	}
 
-	return true, nil
+	return ret, nil
 }
 
 func (round *round2) NextRound() tss.Round {
diff --git a/eddsa/resharing/round_3_old_step_2.go b/eddsa/resharing/round_3_old_step_2.go
index f80fe466..db2e1112 100644
--- a/eddsa/resharing/round_3_old_step_2.go
+++ b/eddsa/resharing/round_3_old_step_2.go
@@ -9,7 +9,7 @@ package resharing
 import (
 	"errors"
 
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 func (round *round3) Start() *tss.Error {
diff --git a/eddsa/resharing/round_4_new_step_2.go b/eddsa/resharing/round_4_new_step_2.go
index fccbaf51..9911142f 100644
--- a/eddsa/resharing/round_4_new_step_2.go
+++ b/eddsa/resharing/round_4_new_step_2.go
@@ -11,11 +11,11 @@ import (
 
 	"github.com/pkg/errors"
 
-	"github.com/binance-chain/tss-lib/common"
-	"github.com/binance-chain/tss-lib/crypto"
-	"github.com/binance-chain/tss-lib/crypto/commitments"
-	"github.com/binance-chain/tss-lib/crypto/vss"
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/common"
+	"github.com/bnb-chain/tss-lib/v2/crypto"
+	"github.com/bnb-chain/tss-lib/v2/crypto/commitments"
+	"github.com/bnb-chain/tss-lib/v2/crypto/vss"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 func (round *round4) Start() *tss.Error {
@@ -40,7 +40,7 @@ func (round *round4) Start() *tss.Error {
 	newXi := big.NewInt(0)
 
 	// 2-8.
-	modQ := common.ModInt(tss.EC().Params().N)
+	modQ := common.ModInt(round.Params().EC().Params().N)
 	vjc := make([][]*crypto.ECPoint, len(round.OldParties().IDs()))
 	for j := 0; j <= len(vjc)-1; j++ { // P1..P_t+1. Ps are indexed from 0 here
 		r1msg := round.temp.dgRound1Messages[j].Content().(*DGRound1Message)
@@ -55,10 +55,15 @@ func (round *round4) Start() *tss.Error {
 			// TODO collect culprits and return a list of them as per convention
 			return round.WrapError(errors.New("de-commitment of v_j0..v_jt failed"), round.Parties().IDs()[j])
 		}
-		vj, err := crypto.UnFlattenECPoints(tss.EC(), flatVs)
+		vj, err := crypto.UnFlattenECPoints(round.Params().EC(), flatVs)
 		if err != nil {
 			return round.WrapError(err, round.Parties().IDs()[j])
 		}
+
+		for i, v := range vj {
+			vj[i] = v.EightInvEight()
+		}
+
 		vjc[j] = vj
 
 		r3msg1 := round.temp.dgRound3Message1s[j].Content().(*DGRound3Message1)
@@ -67,7 +72,7 @@ func (round *round4) Start() *tss.Error {
 			ID:        round.PartyID().KeyInt(),
 			Share:     new(big.Int).SetBytes(r3msg1.Share),
 		}
-		if ok := sharej.Verify(round.NewThreshold(), vj); !ok {
+		if ok := sharej.Verify(round.Params().EC(), round.NewThreshold(), vj); !ok {
 			return round.WrapError(errors.New("share from old committee did not pass Verify()"), round.Parties().IDs()[j])
 		}
 
@@ -136,16 +141,18 @@ func (round *round4) CanAccept(msg tss.ParsedMessage) bool {
 
 func (round *round4) Update() (bool, *tss.Error) {
 	// accept messages from new -> old&new committees
+	ret := true
 	for j, msg := range round.temp.dgRound4Messages {
 		if round.newOK[j] {
 			continue
 		}
 		if msg == nil || !round.CanAccept(msg) {
-			return false, nil
+			ret = false
+			continue
 		}
 		round.newOK[j] = true
 	}
-	return true, nil
+	return ret, nil
 }
 
 func (round *round4) NextRound() tss.Round {
diff --git a/eddsa/resharing/round_5_new_step_3.go b/eddsa/resharing/round_5_new_step_3.go
index 44b335c7..3abc2f28 100644
--- a/eddsa/resharing/round_5_new_step_3.go
+++ b/eddsa/resharing/round_5_new_step_3.go
@@ -9,7 +9,7 @@ package resharing
 import (
 	"errors"
 
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 func (round *round5) Start() *tss.Error {
@@ -33,7 +33,7 @@ func (round *round5) Start() *tss.Error {
 		round.input.Xi.SetInt64(0)
 	}
 
-	round.end <- *round.save
+	round.end <- round.save
 	return nil
 }
 
diff --git a/eddsa/resharing/rounds.go b/eddsa/resharing/rounds.go
index 67a1a3f2..07d1f90e 100644
--- a/eddsa/resharing/rounds.go
+++ b/eddsa/resharing/rounds.go
@@ -7,8 +7,8 @@
 package resharing
 
 import (
-	"github.com/binance-chain/tss-lib/eddsa/keygen"
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/eddsa/keygen"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 const (
@@ -21,7 +21,7 @@ type (
 		temp        *localTempData
 		input, save *keygen.LocalPartySaveData
 		out         chan<- tss.Message
-		end         chan<- keygen.LocalPartySaveData
+		end         chan<- *keygen.LocalPartySaveData
 		oldOK,      // old committee "ok" tracker
 		newOK []bool // `ok` tracks parties which have been verified by Update(); this one is for the new committee
 		started bool
diff --git a/eddsa/signing/eddsa-signing.pb.go b/eddsa/signing/eddsa-signing.pb.go
index 62a772a8..1f130e09 100644
--- a/eddsa/signing/eddsa-signing.pb.go
+++ b/eddsa/signing/eddsa-signing.pb.go
@@ -1,62 +1,76 @@
+// Copyright © 2019 Binance
+//
+// This file is part of Binance. The full Binance copyright notice, including
+// terms governing use, modification, and redistribution, is contained in the
+// file LICENSE at the root of the source code distribution tree.
+
 // Code generated by protoc-gen-go. DO NOT EDIT.
-// source: eddsa-signing.proto
+// versions:
+// 	protoc-gen-go v1.27.1
+// 	protoc        v3.14.0
+// source: protob/eddsa-signing.proto
 
 package signing
 
 import (
-	fmt "fmt"
-	proto "github.com/golang/protobuf/proto"
-	math "math"
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
 )
 
-// Reference imports to suppress errors if they are not otherwise used.
-var _ = proto.Marshal
-var _ = fmt.Errorf
-var _ = math.Inf
-
-// This is a compile-time assertion to ensure that this generated file
-// is compatible with the proto package it is being compiled against.
-// A compilation error at this line likely means your copy of the
-// proto package needs to be updated.
-const _ = proto.ProtoPackageIsVersion3 // please upgrade the proto package
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
 
 //
 // Represents a BROADCAST message sent to all parties during Round 1 of the EDDSA TSS signing protocol.
 type SignRound1Message struct {
-	Commitment           []byte   `protobuf:"bytes,1,opt,name=commitment,proto3" json:"commitment,omitempty"`
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
-}
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
 
-func (m *SignRound1Message) Reset()         { *m = SignRound1Message{} }
-func (m *SignRound1Message) String() string { return proto.CompactTextString(m) }
-func (*SignRound1Message) ProtoMessage()    {}
-func (*SignRound1Message) Descriptor() ([]byte, []int) {
-	return fileDescriptor_cf83f80fc7454980, []int{0}
+	Commitment []byte `protobuf:"bytes,1,opt,name=commitment,proto3" json:"commitment,omitempty"`
 }
 
-func (m *SignRound1Message) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_SignRound1Message.Unmarshal(m, b)
-}
-func (m *SignRound1Message) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_SignRound1Message.Marshal(b, m, deterministic)
-}
-func (m *SignRound1Message) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_SignRound1Message.Merge(m, src)
+func (x *SignRound1Message) Reset() {
+	*x = SignRound1Message{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_protob_eddsa_signing_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
 }
-func (m *SignRound1Message) XXX_Size() int {
-	return xxx_messageInfo_SignRound1Message.Size(m)
+
+func (x *SignRound1Message) String() string {
+	return protoimpl.X.MessageStringOf(x)
 }
-func (m *SignRound1Message) XXX_DiscardUnknown() {
-	xxx_messageInfo_SignRound1Message.DiscardUnknown(m)
+
+func (*SignRound1Message) ProtoMessage() {}
+
+func (x *SignRound1Message) ProtoReflect() protoreflect.Message {
+	mi := &file_protob_eddsa_signing_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
 }
 
-var xxx_messageInfo_SignRound1Message proto.InternalMessageInfo
+// Deprecated: Use SignRound1Message.ProtoReflect.Descriptor instead.
+func (*SignRound1Message) Descriptor() ([]byte, []int) {
+	return file_protob_eddsa_signing_proto_rawDescGZIP(), []int{0}
+}
 
-func (m *SignRound1Message) GetCommitment() []byte {
-	if m != nil {
-		return m.Commitment
+func (x *SignRound1Message) GetCommitment() []byte {
+	if x != nil {
+		return x.Commitment
 	}
 	return nil
 }
@@ -64,64 +78,72 @@ func (m *SignRound1Message) GetCommitment() []byte {
 //
 // Represents a BROADCAST message sent to all parties during Round 2 of the EDDSA TSS signing protocol.
 type SignRound2Message struct {
-	DeCommitment         [][]byte `protobuf:"bytes,1,rep,name=de_commitment,json=deCommitment,proto3" json:"de_commitment,omitempty"`
-	ProofAlphaX          []byte   `protobuf:"bytes,2,opt,name=proof_alpha_x,json=proofAlphaX,proto3" json:"proof_alpha_x,omitempty"`
-	ProofAlphaY          []byte   `protobuf:"bytes,3,opt,name=proof_alpha_y,json=proofAlphaY,proto3" json:"proof_alpha_y,omitempty"`
-	ProofT               []byte   `protobuf:"bytes,4,opt,name=proof_t,json=proofT,proto3" json:"proof_t,omitempty"`
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
-}
-
-func (m *SignRound2Message) Reset()         { *m = SignRound2Message{} }
-func (m *SignRound2Message) String() string { return proto.CompactTextString(m) }
-func (*SignRound2Message) ProtoMessage()    {}
-func (*SignRound2Message) Descriptor() ([]byte, []int) {
-	return fileDescriptor_cf83f80fc7454980, []int{1}
-}
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
 
-func (m *SignRound2Message) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_SignRound2Message.Unmarshal(m, b)
-}
-func (m *SignRound2Message) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_SignRound2Message.Marshal(b, m, deterministic)
+	DeCommitment [][]byte `protobuf:"bytes,1,rep,name=de_commitment,json=deCommitment,proto3" json:"de_commitment,omitempty"`
+	ProofAlphaX  []byte   `protobuf:"bytes,2,opt,name=proof_alpha_x,json=proofAlphaX,proto3" json:"proof_alpha_x,omitempty"`
+	ProofAlphaY  []byte   `protobuf:"bytes,3,opt,name=proof_alpha_y,json=proofAlphaY,proto3" json:"proof_alpha_y,omitempty"`
+	ProofT       []byte   `protobuf:"bytes,4,opt,name=proof_t,json=proofT,proto3" json:"proof_t,omitempty"`
 }
-func (m *SignRound2Message) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_SignRound2Message.Merge(m, src)
+
+func (x *SignRound2Message) Reset() {
+	*x = SignRound2Message{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_protob_eddsa_signing_proto_msgTypes[1]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
 }
-func (m *SignRound2Message) XXX_Size() int {
-	return xxx_messageInfo_SignRound2Message.Size(m)
+
+func (x *SignRound2Message) String() string {
+	return protoimpl.X.MessageStringOf(x)
 }
-func (m *SignRound2Message) XXX_DiscardUnknown() {
-	xxx_messageInfo_SignRound2Message.DiscardUnknown(m)
+
+func (*SignRound2Message) ProtoMessage() {}
+
+func (x *SignRound2Message) ProtoReflect() protoreflect.Message {
+	mi := &file_protob_eddsa_signing_proto_msgTypes[1]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
 }
 
-var xxx_messageInfo_SignRound2Message proto.InternalMessageInfo
+// Deprecated: Use SignRound2Message.ProtoReflect.Descriptor instead.
+func (*SignRound2Message) Descriptor() ([]byte, []int) {
+	return file_protob_eddsa_signing_proto_rawDescGZIP(), []int{1}
+}
 
-func (m *SignRound2Message) GetDeCommitment() [][]byte {
-	if m != nil {
-		return m.DeCommitment
+func (x *SignRound2Message) GetDeCommitment() [][]byte {
+	if x != nil {
+		return x.DeCommitment
 	}
 	return nil
 }
 
-func (m *SignRound2Message) GetProofAlphaX() []byte {
-	if m != nil {
-		return m.ProofAlphaX
+func (x *SignRound2Message) GetProofAlphaX() []byte {
+	if x != nil {
+		return x.ProofAlphaX
 	}
 	return nil
 }
 
-func (m *SignRound2Message) GetProofAlphaY() []byte {
-	if m != nil {
-		return m.ProofAlphaY
+func (x *SignRound2Message) GetProofAlphaY() []byte {
+	if x != nil {
+		return x.ProofAlphaY
 	}
 	return nil
 }
 
-func (m *SignRound2Message) GetProofT() []byte {
-	if m != nil {
-		return m.ProofT
+func (x *SignRound2Message) GetProofT() []byte {
+	if x != nil {
+		return x.ProofT
 	}
 	return nil
 }
@@ -129,65 +151,163 @@ func (m *SignRound2Message) GetProofT() []byte {
 //
 // Represents a BROADCAST message sent to all parties during Round 3 of the EDDSA TSS signing protocol.
 type SignRound3Message struct {
-	S                    []byte   `protobuf:"bytes,1,opt,name=s,proto3" json:"s,omitempty"`
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	S []byte `protobuf:"bytes,1,opt,name=s,proto3" json:"s,omitempty"`
 }
 
-func (m *SignRound3Message) Reset()         { *m = SignRound3Message{} }
-func (m *SignRound3Message) String() string { return proto.CompactTextString(m) }
-func (*SignRound3Message) ProtoMessage()    {}
-func (*SignRound3Message) Descriptor() ([]byte, []int) {
-	return fileDescriptor_cf83f80fc7454980, []int{2}
+func (x *SignRound3Message) Reset() {
+	*x = SignRound3Message{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_protob_eddsa_signing_proto_msgTypes[2]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
 }
 
-func (m *SignRound3Message) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_SignRound3Message.Unmarshal(m, b)
+func (x *SignRound3Message) String() string {
+	return protoimpl.X.MessageStringOf(x)
 }
-func (m *SignRound3Message) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_SignRound3Message.Marshal(b, m, deterministic)
+
+func (*SignRound3Message) ProtoMessage() {}
+
+func (x *SignRound3Message) ProtoReflect() protoreflect.Message {
+	mi := &file_protob_eddsa_signing_proto_msgTypes[2]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
 }
-func (m *SignRound3Message) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_SignRound3Message.Merge(m, src)
+
+// Deprecated: Use SignRound3Message.ProtoReflect.Descriptor instead.
+func (*SignRound3Message) Descriptor() ([]byte, []int) {
+	return file_protob_eddsa_signing_proto_rawDescGZIP(), []int{2}
 }
-func (m *SignRound3Message) XXX_Size() int {
-	return xxx_messageInfo_SignRound3Message.Size(m)
+
+func (x *SignRound3Message) GetS() []byte {
+	if x != nil {
+		return x.S
+	}
+	return nil
 }
-func (m *SignRound3Message) XXX_DiscardUnknown() {
-	xxx_messageInfo_SignRound3Message.DiscardUnknown(m)
+
+var File_protob_eddsa_signing_proto protoreflect.FileDescriptor
+
+var file_protob_eddsa_signing_proto_rawDesc = []byte{
+	0x0a, 0x1a, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x62, 0x2f, 0x65, 0x64, 0x64, 0x73, 0x61, 0x2d, 0x73,
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+	0x01, 0x28, 0x0c, 0x52, 0x06, 0x70, 0x72, 0x6f, 0x6f, 0x66, 0x54, 0x22, 0x21, 0x0a, 0x11, 0x53,
+	0x69, 0x67, 0x6e, 0x52, 0x6f, 0x75, 0x6e, 0x64, 0x33, 0x4d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65,
+	0x12, 0x0c, 0x0a, 0x01, 0x73, 0x18, 0x01, 0x20, 0x01, 0x28, 0x0c, 0x52, 0x01, 0x73, 0x42, 0x0f,
+	0x5a, 0x0d, 0x65, 0x64, 0x64, 0x73, 0x61, 0x2f, 0x73, 0x69, 0x67, 0x6e, 0x69, 0x6e, 0x67, 0x62,
+	0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
-var xxx_messageInfo_SignRound3Message proto.InternalMessageInfo
+var (
+	file_protob_eddsa_signing_proto_rawDescOnce sync.Once
+	file_protob_eddsa_signing_proto_rawDescData = file_protob_eddsa_signing_proto_rawDesc
+)
 
-func (m *SignRound3Message) GetS() []byte {
-	if m != nil {
-		return m.S
-	}
-	return nil
+func file_protob_eddsa_signing_proto_rawDescGZIP() []byte {
+	file_protob_eddsa_signing_proto_rawDescOnce.Do(func() {
+		file_protob_eddsa_signing_proto_rawDescData = protoimpl.X.CompressGZIP(file_protob_eddsa_signing_proto_rawDescData)
+	})
+	return file_protob_eddsa_signing_proto_rawDescData
 }
 
-func init() {
-	proto.RegisterType((*SignRound1Message)(nil), "SignRound1Message")
-	proto.RegisterType((*SignRound2Message)(nil), "SignRound2Message")
-	proto.RegisterType((*SignRound3Message)(nil), "SignRound3Message")
-}
-
-func init() { proto.RegisterFile("eddsa-signing.proto", fileDescriptor_cf83f80fc7454980) }
-
-var fileDescriptor_cf83f80fc7454980 = []byte{
-	// 197 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0x12, 0x4e, 0x4d, 0x49, 0x29,
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-	0x4f, 0x4a, 0xaa, 0x33, 0x5c, 0x4c, 0x48, 0x89, 0x8b, 0xb7, 0xa0, 0x28, 0x3f, 0x3f, 0x2d, 0x3e,
-	0x31, 0xa7, 0x20, 0x23, 0x31, 0xbe, 0x42, 0x82, 0x09, 0x6c, 0x3a, 0x37, 0x58, 0xd0, 0x11, 0x24,
-	0x16, 0x81, 0xae, 0xa6, 0x52, 0x82, 0x19, 0x5d, 0x4d, 0xa4, 0x90, 0x38, 0x17, 0x3b, 0x44, 0x4d,
-	0x89, 0x04, 0x0b, 0x58, 0x96, 0x0d, 0xcc, 0x0d, 0x51, 0x52, 0x44, 0x72, 0x9a, 0x31, 0xcc, 0x69,
-	0x3c, 0x5c, 0x8c, 0xc5, 0x50, 0x7f, 0x30, 0x16, 0x3b, 0xf1, 0x47, 0xf1, 0x82, 0x83, 0x42, 0x1f,
-	0x1a, 0x14, 0x49, 0x6c, 0xe0, 0xb0, 0x30, 0x06, 0x04, 0x00, 0x00, 0xff, 0xff, 0x0a, 0x36, 0x85,
-	0xc1, 0x22, 0x01, 0x00, 0x00,
+var file_protob_eddsa_signing_proto_msgTypes = make([]protoimpl.MessageInfo, 3)
+var file_protob_eddsa_signing_proto_goTypes = []interface{}{
+	(*SignRound1Message)(nil), // 0: binance.tsslib.eddsa.signing.SignRound1Message
+	(*SignRound2Message)(nil), // 1: binance.tsslib.eddsa.signing.SignRound2Message
+	(*SignRound3Message)(nil), // 2: binance.tsslib.eddsa.signing.SignRound3Message
+}
+var file_protob_eddsa_signing_proto_depIdxs = []int32{
+	0, // [0:0] is the sub-list for method output_type
+	0, // [0:0] is the sub-list for method input_type
+	0, // [0:0] is the sub-list for extension type_name
+	0, // [0:0] is the sub-list for extension extendee
+	0, // [0:0] is the sub-list for field type_name
+}
+
+func init() { file_protob_eddsa_signing_proto_init() }
+func file_protob_eddsa_signing_proto_init() {
+	if File_protob_eddsa_signing_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_protob_eddsa_signing_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*SignRound1Message); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_protob_eddsa_signing_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*SignRound2Message); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_protob_eddsa_signing_proto_msgTypes[2].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*SignRound3Message); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_protob_eddsa_signing_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   3,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_protob_eddsa_signing_proto_goTypes,
+		DependencyIndexes: file_protob_eddsa_signing_proto_depIdxs,
+		MessageInfos:      file_protob_eddsa_signing_proto_msgTypes,
+	}.Build()
+	File_protob_eddsa_signing_proto = out.File
+	file_protob_eddsa_signing_proto_rawDesc = nil
+	file_protob_eddsa_signing_proto_goTypes = nil
+	file_protob_eddsa_signing_proto_depIdxs = nil
 }
diff --git a/eddsa/signing/finalize.go b/eddsa/signing/finalize.go
index 7313580a..aaafd255 100644
--- a/eddsa/signing/finalize.go
+++ b/eddsa/signing/finalize.go
@@ -14,7 +14,7 @@ import (
 	"github.com/agl/ed25519/edwards25519"
 	"github.com/decred/dcrd/dcrec/edwards/v2"
 
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 func (round *finalization) Start() *tss.Error {
@@ -37,25 +37,25 @@ func (round *finalization) Start() *tss.Error {
 		edwards25519.ScMulAdd(&tmpSumS, sumS, bigIntToEncodedBytes(big.NewInt(1)), sjBytes)
 		sumS = &tmpSumS
 	}
+	s := encodedBytesToBigInt(sumS)
 
 	// save the signature for final output
 	round.data.Signature = append(bigIntToEncodedBytes(round.temp.r)[:], sumS[:]...)
 	round.data.R = round.temp.r.Bytes()
-	round.data.S = sumS[:]
+	round.data.S = s.Bytes()
 	round.data.M = round.temp.m.Bytes()
 
 	pk := edwards.PublicKey{
-		Curve: tss.EC(),
+		Curve: round.Params().EC(),
 		X:     round.key.EDDSAPub.X(),
 		Y:     round.key.EDDSAPub.Y(),
 	}
-	s := encodedBytesToBigInt(sumS)
 
 	ok := edwards.Verify(&pk, round.temp.m.Bytes(), round.temp.r, s)
 	if !ok {
 		return round.WrapError(fmt.Errorf("signature verification failed"))
 	}
-	round.end <- *round.data
+	round.end <- round.data
 
 	return nil
 }
diff --git a/eddsa/signing/local_party.go b/eddsa/signing/local_party.go
index bb001e0f..d11a29c4 100644
--- a/eddsa/signing/local_party.go
+++ b/eddsa/signing/local_party.go
@@ -11,11 +11,11 @@ import (
 	"fmt"
 	"math/big"
 
-	"github.com/binance-chain/tss-lib/common"
-	"github.com/binance-chain/tss-lib/crypto"
-	cmt "github.com/binance-chain/tss-lib/crypto/commitments"
-	"github.com/binance-chain/tss-lib/eddsa/keygen"
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/common"
+	"github.com/bnb-chain/tss-lib/v2/crypto"
+	cmt "github.com/bnb-chain/tss-lib/v2/crypto/commitments"
+	"github.com/bnb-chain/tss-lib/v2/eddsa/keygen"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 // Implements Party
@@ -30,11 +30,11 @@ type (
 
 		keys keygen.LocalPartySaveData
 		temp localTempData
-		data common.SignatureData
+		data *common.SignatureData
 
 		// outbound messaging
 		out chan<- tss.Message
-		end chan<- common.SignatureData
+		end chan<- *common.SignatureData
 	}
 
 	localMessageStore struct {
@@ -59,6 +59,9 @@ type (
 
 		// round 3
 		r *big.Int
+
+		ssid      []byte
+		ssidNonce *big.Int
 	}
 )
 
@@ -67,7 +70,7 @@ func NewLocalParty(
 	params *tss.Parameters,
 	key keygen.LocalPartySaveData,
 	out chan<- tss.Message,
-	end chan<- common.SignatureData,
+	end chan<- *common.SignatureData,
 ) tss.Party {
 	partyCount := len(params.Parties().IDs())
 	p := &LocalParty{
@@ -75,7 +78,7 @@ func NewLocalParty(
 		params:    params,
 		keys:      keygen.BuildLocalSaveDataSubset(key, params.Parties().IDs()),
 		temp:      localTempData{},
-		data:      common.SignatureData{},
+		data:      &common.SignatureData{},
 		out:       out,
 		end:       end,
 	}
@@ -91,7 +94,7 @@ func NewLocalParty(
 }
 
 func (p *LocalParty) FirstRound() tss.Round {
-	return newRound1(p.params, &p.keys, &p.data, &p.temp, p.out, p.end)
+	return newRound1(p.params, &p.keys, p.data, &p.temp, p.out, p.end)
 }
 
 func (p *LocalParty) Start() *tss.Error {
diff --git a/eddsa/signing/local_party_test.go b/eddsa/signing/local_party_test.go
index 36303470..33f6fa4e 100644
--- a/eddsa/signing/local_party_test.go
+++ b/eddsa/signing/local_party_test.go
@@ -17,10 +17,10 @@ import (
 	"github.com/ipfs/go-log"
 	"github.com/stretchr/testify/assert"
 
-	"github.com/binance-chain/tss-lib/common"
-	"github.com/binance-chain/tss-lib/eddsa/keygen"
-	"github.com/binance-chain/tss-lib/test"
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/common"
+	"github.com/bnb-chain/tss-lib/v2/eddsa/keygen"
+	"github.com/bnb-chain/tss-lib/v2/test"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 const (
@@ -32,13 +32,14 @@ func setUp(level string) {
 	if err := log.SetLogLevel("tss-lib", level); err != nil {
 		panic(err)
 	}
+
+	// only for test
+	tss.SetCurve(tss.Edwards())
 }
 
 func TestE2EConcurrent(t *testing.T) {
 	setUp("info")
 
-	tss.SetCurve(edwards.Edwards())
-
 	threshold := testThreshold
 
 	// PHASE: load keygen fixtures
@@ -54,14 +55,14 @@ func TestE2EConcurrent(t *testing.T) {
 
 	errCh := make(chan *tss.Error, len(signPIDs))
 	outCh := make(chan tss.Message, len(signPIDs))
-	endCh := make(chan common.SignatureData, len(signPIDs))
+	endCh := make(chan *common.SignatureData, len(signPIDs))
 
 	updater := test.SharedPartyUpdater
 
 	msg := big.NewInt(200)
 	// init the parties
 	for i := 0; i < len(signPIDs); i++ {
-		params := tss.NewParameters(p2pCtx, signPIDs[i], len(signPIDs), threshold)
+		params := tss.NewParameters(tss.Edwards(), p2pCtx, signPIDs[i], len(signPIDs), threshold)
 
 		P := NewLocalParty(msg, params, keys[i], outCh, endCh).(*LocalParty)
 		parties = append(parties, P)
@@ -121,7 +122,7 @@ signing:
 				// BEGIN EDDSA verify
 				pkX, pkY := keys[0].EDDSAPub.X(), keys[0].EDDSAPub.Y()
 				pk := edwards.PublicKey{
-					Curve: tss.EC(),
+					Curve: tss.Edwards(),
 					X:     pkX,
 					Y:     pkY,
 				}
diff --git a/eddsa/signing/messages.go b/eddsa/signing/messages.go
index 4cf6070b..c60e1880 100644
--- a/eddsa/signing/messages.go
+++ b/eddsa/signing/messages.go
@@ -7,15 +7,14 @@
 package signing
 
 import (
+	"crypto/elliptic"
 	"math/big"
 
-	"github.com/golang/protobuf/proto"
-
-	"github.com/binance-chain/tss-lib/common"
-	"github.com/binance-chain/tss-lib/crypto"
-	cmt "github.com/binance-chain/tss-lib/crypto/commitments"
-	"github.com/binance-chain/tss-lib/crypto/schnorr"
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/common"
+	"github.com/bnb-chain/tss-lib/v2/crypto"
+	cmt "github.com/bnb-chain/tss-lib/v2/crypto/commitments"
+	"github.com/bnb-chain/tss-lib/v2/crypto/schnorr"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 // These messages were generated from Protocol Buffers definitions into eddsa-signing.pb.go
@@ -30,12 +29,6 @@ var (
 	}
 )
 
-func init() {
-	proto.RegisterType((*SignRound1Message)(nil), tss.EDDSAProtoNamePrefix+"signing.SignRound1Message")
-	proto.RegisterType((*SignRound2Message)(nil), tss.EDDSAProtoNamePrefix+"signing.SignRound2Message")
-	proto.RegisterType((*SignRound3Message)(nil), tss.EDDSAProtoNamePrefix+"signing.SignRound3Message")
-}
-
 // ----- //
 
 func NewSignRound1Message(
@@ -97,9 +90,9 @@ func (m *SignRound2Message) UnmarshalDeCommitment() []*big.Int {
 	return cmt.NewHashDeCommitmentFromBytes(deComBzs)
 }
 
-func (m *SignRound2Message) UnmarshalZKProof() (*schnorr.ZKProof, error) {
+func (m *SignRound2Message) UnmarshalZKProof(ec elliptic.Curve) (*schnorr.ZKProof, error) {
 	point, err := crypto.NewECPoint(
-		tss.EC(),
+		ec,
 		new(big.Int).SetBytes(m.GetProofAlphaX()),
 		new(big.Int).SetBytes(m.GetProofAlphaY()))
 	if err != nil {
diff --git a/eddsa/signing/prepare.go b/eddsa/signing/prepare.go
index 59981779..1e86b437 100644
--- a/eddsa/signing/prepare.go
+++ b/eddsa/signing/prepare.go
@@ -7,16 +7,16 @@
 package signing
 
 import (
+	"crypto/elliptic"
 	"fmt"
 	"math/big"
 
-	"github.com/binance-chain/tss-lib/common"
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/common"
 )
 
 // PrepareForSigning(), Fig. 7
-func PrepareForSigning(i, pax int, xi *big.Int, ks []*big.Int) (wi *big.Int) {
-	modQ := common.ModInt(tss.EC().Params().N)
+func PrepareForSigning(ec elliptic.Curve, i, pax int, xi *big.Int, ks []*big.Int) (wi *big.Int) {
+	modQ := common.ModInt(ec.Params().N)
 	if len(ks) != pax {
 		panic(fmt.Errorf("PrepareForSigning: len(ks) != pax (%d != %d)", len(ks), pax))
 	}
@@ -30,8 +30,13 @@ func PrepareForSigning(i, pax int, xi *big.Int, ks []*big.Int) (wi *big.Int) {
 		if j == i {
 			continue
 		}
+		ksj := ks[j]
+		ksi := ks[i]
+		if ksj.Cmp(ksi) == 0 {
+			panic(fmt.Errorf("index of two parties are equal"))
+		}
 		// big.Int Div is calculated as: a/b = a * modInv(b,q)
-		coef := modQ.Mul(ks[j], modQ.ModInverse(new(big.Int).Sub(ks[j], ks[i])))
+		coef := modQ.Mul(ks[j], modQ.ModInverse(new(big.Int).Sub(ksj, ksi)))
 		wi = modQ.Mul(wi, coef)
 	}
 
diff --git a/eddsa/signing/round_1.go b/eddsa/signing/round_1.go
index ada10ddf..21f6fa38 100644
--- a/eddsa/signing/round_1.go
+++ b/eddsa/signing/round_1.go
@@ -9,16 +9,17 @@ package signing
 import (
 	"errors"
 	"fmt"
+	"math/big"
 
-	"github.com/binance-chain/tss-lib/common"
-	"github.com/binance-chain/tss-lib/crypto"
-	"github.com/binance-chain/tss-lib/crypto/commitments"
-	"github.com/binance-chain/tss-lib/eddsa/keygen"
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/common"
+	"github.com/bnb-chain/tss-lib/v2/crypto"
+	"github.com/bnb-chain/tss-lib/v2/crypto/commitments"
+	"github.com/bnb-chain/tss-lib/v2/eddsa/keygen"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 // round 1 represents round 1 of the signing part of the EDDSA TSS spec
-func newRound1(params *tss.Parameters, key *keygen.LocalPartySaveData, data *common.SignatureData, temp *localTempData, out chan<- tss.Message, end chan<- common.SignatureData) tss.Round {
+func newRound1(params *tss.Parameters, key *keygen.LocalPartySaveData, data *common.SignatureData, temp *localTempData, out chan<- tss.Message, end chan<- *common.SignatureData) tss.Round {
 	return &round1{
 		&base{params, key, data, temp, out, end, make([]bool, len(params.Parties().IDs())), false, 1}}
 }
@@ -32,11 +33,17 @@ func (round *round1) Start() *tss.Error {
 	round.started = true
 	round.resetOK()
 
+	round.temp.ssidNonce = new(big.Int).SetUint64(0)
+	var err error
+	round.temp.ssid, err = round.getSSID()
+	if err != nil {
+		return round.WrapError(err)
+	}
 	// 1. select ri
-	ri := common.GetRandomPositiveInt(tss.EC().Params().N)
+	ri := common.GetRandomPositiveInt(round.Params().EC().Params().N)
 
 	// 2. make commitment
-	pointRi := crypto.ScalarBaseMult(tss.EC(), ri)
+	pointRi := crypto.ScalarBaseMult(round.Params().EC(), ri)
 	cmt := commitments.NewHashCommitment(pointRi.X(), pointRi.Y())
 
 	// 3. store r1 message pieces
@@ -56,16 +63,18 @@ func (round *round1) Start() *tss.Error {
 }
 
 func (round *round1) Update() (bool, *tss.Error) {
+	ret := true
 	for j, msg := range round.temp.signRound1Messages {
 		if round.ok[j] {
 			continue
 		}
 		if msg == nil || !round.CanAccept(msg) {
-			return false, nil
+			ret = false
+			continue
 		}
 		round.ok[j] = true
 	}
-	return true, nil
+	return ret, nil
 }
 
 func (round *round1) CanAccept(msg tss.ParsedMessage) bool {
@@ -92,7 +101,7 @@ func (round *round1) prepare() error {
 	if round.Threshold()+1 > len(ks) {
 		return fmt.Errorf("t+1=%d is not satisfied by the key count of %d", round.Threshold()+1, len(ks))
 	}
-	wi := PrepareForSigning(i, len(ks), xi, ks)
+	wi := PrepareForSigning(round.Params().EC(), i, len(ks), xi, ks)
 
 	round.temp.wi = wi
 	return nil
diff --git a/eddsa/signing/round_2.go b/eddsa/signing/round_2.go
index 6e2bf3c6..1348a39a 100644
--- a/eddsa/signing/round_2.go
+++ b/eddsa/signing/round_2.go
@@ -8,11 +8,12 @@ package signing
 
 import (
 	"errors"
+	"math/big"
 
 	errors2 "github.com/pkg/errors"
 
-	"github.com/binance-chain/tss-lib/crypto/schnorr"
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/crypto/schnorr"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 func (round *round2) Start() *tss.Error {
@@ -32,7 +33,8 @@ func (round *round2) Start() *tss.Error {
 	}
 
 	// 2. compute Schnorr prove
-	pir, err := schnorr.NewZKProof(round.temp.ri, round.temp.pointRi)
+	ContextI := append(round.temp.ssid, new(big.Int).SetUint64(uint64(i)).Bytes()...)
+	pir, err := schnorr.NewZKProof(ContextI, round.temp.ri, round.temp.pointRi)
 	if err != nil {
 		return round.WrapError(errors2.Wrapf(err, "NewZKProof(ri, pointRi)"))
 	}
@@ -53,16 +55,18 @@ func (round *round2) CanAccept(msg tss.ParsedMessage) bool {
 }
 
 func (round *round2) Update() (bool, *tss.Error) {
+	ret := true
 	for j, msg := range round.temp.signRound2Messages {
 		if round.ok[j] {
 			continue
 		}
 		if msg == nil || !round.CanAccept(msg) {
-			return false, nil
+			ret = false
+			continue
 		}
 		round.ok[j] = true
 	}
-	return true, nil
+	return ret, nil
 }
 
 func (round *round2) NextRound() tss.Round {
diff --git a/eddsa/signing/round_3.go b/eddsa/signing/round_3.go
index 2fd822a4..b2567f54 100644
--- a/eddsa/signing/round_3.go
+++ b/eddsa/signing/round_3.go
@@ -8,13 +8,15 @@ package signing
 
 import (
 	"crypto/sha512"
+	"math/big"
 
 	"github.com/agl/ed25519/edwards25519"
+	"github.com/bnb-chain/tss-lib/v2/common"
 	"github.com/pkg/errors"
 
-	"github.com/binance-chain/tss-lib/crypto"
-	"github.com/binance-chain/tss-lib/crypto/commitments"
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/crypto"
+	"github.com/bnb-chain/tss-lib/v2/crypto/commitments"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 func (round *round3) Start() *tss.Error {
@@ -38,6 +40,7 @@ func (round *round3) Start() *tss.Error {
 			continue
 		}
 
+		ContextJ := common.AppendBigIntToBytesSlice(round.temp.ssid, big.NewInt(int64(j)))
 		msg := round.temp.signRound2Messages[j]
 		r2msg := msg.Content().(*SignRound2Message)
 		cmtDeCmt := commitments.HashCommitDecommit{C: round.temp.cjs[j], D: r2msg.UnmarshalDeCommitment()}
@@ -49,20 +52,21 @@ func (round *round3) Start() *tss.Error {
 			return round.WrapError(errors.New("length of de-commitment should be 2"))
 		}
 
-		Rj, err := crypto.NewECPoint(tss.EC(), coordinates[0], coordinates[1])
+		Rj, err := crypto.NewECPoint(round.Params().EC(), coordinates[0], coordinates[1])
+		Rj = Rj.EightInvEight()
 		if err != nil {
 			return round.WrapError(errors.Wrapf(err, "NewECPoint(Rj)"), Pj)
 		}
-		proof, err := r2msg.UnmarshalZKProof()
+		proof, err := r2msg.UnmarshalZKProof(round.Params().EC())
 		if err != nil {
 			return round.WrapError(errors.New("failed to unmarshal Rj proof"), Pj)
 		}
-		ok = proof.Verify(Rj)
+		ok = proof.Verify(ContextJ, Rj)
 		if !ok {
 			return round.WrapError(errors.New("failed to prove Rj"), Pj)
 		}
 
-		extendedRj := ecPointToExtendedElement(Rj.X(), Rj.Y())
+		extendedRj := ecPointToExtendedElement(round.Params().EC(), Rj.X(), Rj.Y())
 		R = addExtendedElements(R, extendedRj)
 	}
 
@@ -100,16 +104,18 @@ func (round *round3) Start() *tss.Error {
 }
 
 func (round *round3) Update() (bool, *tss.Error) {
+	ret := true
 	for j, msg := range round.temp.signRound3Messages {
 		if round.ok[j] {
 			continue
 		}
 		if msg == nil || !round.CanAccept(msg) {
-			return false, nil
+			ret = false
+			continue
 		}
 		round.ok[j] = true
 	}
-	return true, nil
+	return ret, nil
 }
 
 func (round *round3) CanAccept(msg tss.ParsedMessage) bool {
diff --git a/eddsa/signing/rounds.go b/eddsa/signing/rounds.go
index 4cb7c91b..81723c0d 100644
--- a/eddsa/signing/rounds.go
+++ b/eddsa/signing/rounds.go
@@ -7,9 +7,13 @@
 package signing
 
 import (
-	"github.com/binance-chain/tss-lib/common"
-	"github.com/binance-chain/tss-lib/eddsa/keygen"
-	"github.com/binance-chain/tss-lib/tss"
+	"errors"
+	"math/big"
+
+	"github.com/bnb-chain/tss-lib/v2/common"
+	"github.com/bnb-chain/tss-lib/v2/crypto"
+	"github.com/bnb-chain/tss-lib/v2/eddsa/keygen"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 const (
@@ -23,7 +27,7 @@ type (
 		data    *common.SignatureData
 		temp    *localTempData
 		out     chan<- tss.Message
-		end     chan<- common.SignatureData
+		end     chan<- *common.SignatureData
 		ok      []bool // `ok` tracks parties which have been verified by Update()
 		started bool
 		number  int
@@ -97,3 +101,19 @@ func (round *base) resetOK() {
 		round.ok[j] = false
 	}
 }
+
+// get ssid from local params
+func (round *base) getSSID() ([]byte, error) {
+	ssidList := []*big.Int{round.EC().Params().P, round.EC().Params().N, round.EC().Params().Gx, round.EC().Params().Gy} // ec curve
+	ssidList = append(ssidList, round.Parties().IDs().Keys()...)                                                         // parties
+	BigXjList, err := crypto.FlattenECPoints(round.key.BigXj)
+	if err != nil {
+		return nil, round.WrapError(errors.New("read BigXj failed"), round.PartyID())
+	}
+	ssidList = append(ssidList, BigXjList...)                    // BigXj
+	ssidList = append(ssidList, big.NewInt(int64(round.number))) // round number
+	ssidList = append(ssidList, round.temp.ssidNonce)
+	ssid := common.SHA512_256i(ssidList...).Bytes()
+
+	return ssid, nil
+}
diff --git a/eddsa/signing/utils.go b/eddsa/signing/utils.go
index 8dd58a28..d3b41f8f 100644
--- a/eddsa/signing/utils.go
+++ b/eddsa/signing/utils.go
@@ -7,12 +7,12 @@
 package signing
 
 import (
+	"crypto/elliptic"
 	"math/big"
 
 	"github.com/agl/ed25519/edwards25519"
 
-	"github.com/binance-chain/tss-lib/common"
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/common"
 )
 
 func encodedBytesToBigInt(s *[32]byte) *big.Int {
@@ -100,11 +100,11 @@ func addExtendedElements(p, q edwards25519.ExtendedGroupElement) edwards25519.Ex
 	return result
 }
 
-func ecPointToExtendedElement(x *big.Int, y *big.Int) edwards25519.ExtendedGroupElement {
+func ecPointToExtendedElement(ec elliptic.Curve, x *big.Int, y *big.Int) edwards25519.ExtendedGroupElement {
 	encodedXBytes := bigIntToEncodedBytes(x)
 	encodedYBytes := bigIntToEncodedBytes(y)
 
-	z := common.GetRandomPositiveInt(tss.EC().Params().N)
+	z := common.GetRandomPositiveInt(ec.Params().N)
 	encodedZBytes := bigIntToEncodedBytes(z)
 
 	var fx, fy, fxy edwards25519.FieldElement
diff --git a/go.mod b/go.mod
index b38587a1..499f9466 100644
--- a/go.mod
+++ b/go.mod
@@ -1,22 +1,20 @@
-module github.com/binance-chain/tss-lib
+module github.com/bnb-chain/tss-lib/v2
 
-go 1.12
+go 1.16
 
 require (
-	github.com/agl/ed25519 v0.0.0-20170116200512-5312a6153412
-	github.com/btcsuite/btcd v0.0.0-20190629003639-c26ffa870fd8
-	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/decred/dcrd/dcrec/edwards/v2 v2.0.0
-	github.com/golang/protobuf v1.3.2
-	github.com/hashicorp/go-multierror v1.0.0
-	github.com/ipfs/go-log v0.0.1
-	github.com/mattn/go-colorable v0.1.2 // indirect
-	github.com/opentracing/opentracing-go v1.1.0 // indirect
-	github.com/otiai10/mint v1.2.4 // indirect
-	github.com/otiai10/primes v0.0.0-20180210170552-f6d2a1ba97c4
-	github.com/pkg/errors v0.8.1
-	github.com/stretchr/testify v1.3.0
-	golang.org/x/sys v0.0.0-20190712062909-fae7ac547cb7 // indirect
+	github.com/agl/ed25519 v0.0.0-20200225211852-fd4d107ace12
+	github.com/btcsuite/btcd v0.23.4
+	github.com/btcsuite/btcd/btcec/v2 v2.3.2
+	github.com/btcsuite/btcutil v1.0.2
+	github.com/decred/dcrd/dcrec/edwards/v2 v2.0.3
+	github.com/hashicorp/go-multierror v1.1.1
+	github.com/ipfs/go-log v1.0.5
+	github.com/otiai10/primes v0.0.0-20210501021515-f1b2be525a11
+	github.com/pkg/errors v0.9.1
+	github.com/stretchr/testify v1.8.4
+	golang.org/x/crypto v0.13.0
+	google.golang.org/protobuf v1.31.0
 )
 
 replace github.com/agl/ed25519 => github.com/binance-chain/edwards25519 v0.0.0-20200305024217-f36fc4b53d43
diff --git a/go.sum b/go.sum
index c7cbf922..1c7500cd 100644
--- a/go.sum
+++ b/go.sum
@@ -1,79 +1,237 @@
-bou.ke/monkey v1.0.1 h1:zEMLInw9xvNakzUUPjfS4Ds6jYPqCFx3m7bRmG5NH2U=
-bou.ke/monkey v1.0.1/go.mod h1:FgHuK96Rv2Nlf+0u1OOVDpCMdsWyOFmeeketDHE7LIg=
+github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
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 github.com/aead/siphash v1.0.1/go.mod h1:Nywa3cDsYNNK3gaciGTWPwHt0wlpNV15vwmswBAUSII=
 github.com/binance-chain/edwards25519 v0.0.0-20200305024217-f36fc4b53d43 h1:Vkf7rtHx8uHx8gDfkQaCdVfc+gfrF9v6sR6xJy7RXNg=
 github.com/binance-chain/edwards25519 v0.0.0-20200305024217-f36fc4b53d43/go.mod h1:TnVqVdGEK8b6erOMkcyYGWzCQMw7HEMCOw3BgFYCFWs=
-github.com/btcsuite/btcd v0.0.0-20190629003639-c26ffa870fd8 h1:mOg8/RgDSHTQ1R0IR+LMDuW4TDShPv+JzYHuR4GLoNA=
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diff --git a/protob/ecdsa-keygen.proto b/protob/ecdsa-keygen.proto
index c00f2ef6..249da904 100644
--- a/protob/ecdsa-keygen.proto
+++ b/protob/ecdsa-keygen.proto
@@ -5,7 +5,7 @@
 // file LICENSE at the root of the source code distribution tree.
 
 syntax = "proto3";
-
+package binance.tsslib.ecdsa.keygen;
 option go_package = "ecdsa/keygen";
 
 /*
@@ -26,6 +26,7 @@ message KGRound1Message {
  */
 message KGRound2Message1 {
     bytes share = 1;
+    repeated bytes facProof = 2;
 }
 
 /*
@@ -33,6 +34,7 @@ message KGRound2Message1 {
  */
 message KGRound2Message2 {
     repeated bytes de_commitment = 1;
+    repeated bytes modProof = 2;
 }
 
 /*
diff --git a/protob/ecdsa-resharing.proto b/protob/ecdsa-resharing.proto
index 51e3bff3..d19b7fc7 100644
--- a/protob/ecdsa-resharing.proto
+++ b/protob/ecdsa-resharing.proto
@@ -5,7 +5,7 @@
 // file LICENSE at the root of the source code distribution tree.
 
 syntax = "proto3";
-
+package binance.tsslib.ecdsa.resharing;
 option go_package = "ecdsa/resharing";
 
 /*
@@ -15,6 +15,7 @@ message DGRound1Message {
     bytes ecdsa_pub_x = 1;
     bytes ecdsa_pub_y = 2;
     bytes v_commitment = 3;
+    bytes ssid = 4;
 }
 
 /*
@@ -22,7 +23,7 @@ message DGRound1Message {
  */
 message DGRound2Message1 {
     bytes paillier_n = 1;
-    repeated bytes paillier_proof = 2;
+    repeated bytes modProof = 2;
     bytes n_tilde = 3;
     bytes h1 = 4;
     bytes h2 = 5;
@@ -53,5 +54,12 @@ message DGRound3Message2 {
 /*
  * The Round 4 "ACK" is broadcast to peers of the Old and New Committees from the New Committee in this message.
  */
-message DGRound4Message {
+message DGRound4Message2 {
 }
+
+/*
+ * The Round 4 message to peers of New Committees from the New Committee in this message.
+ */
+message DGRound4Message1 {
+    repeated bytes facProof = 1;
+}
\ No newline at end of file
diff --git a/protob/ecdsa-signing.proto b/protob/ecdsa-signing.proto
index ef23f170..08591c03 100644
--- a/protob/ecdsa-signing.proto
+++ b/protob/ecdsa-signing.proto
@@ -5,7 +5,7 @@
 // file LICENSE at the root of the source code distribution tree.
 
 syntax = "proto3";
-
+package binance.tsslib.ecdsa.signing;
 option go_package = "ecdsa/signing";
 
 /*
diff --git a/protob/eddsa-keygen.proto b/protob/eddsa-keygen.proto
index 52d9f530..199d0502 100644
--- a/protob/eddsa-keygen.proto
+++ b/protob/eddsa-keygen.proto
@@ -5,7 +5,7 @@
 // file LICENSE at the root of the source code distribution tree.
 
 syntax = "proto3";
-
+package binance.tsslib.eddsa.keygen;
 option go_package = "eddsa/keygen";
 
 /*
diff --git a/protob/eddsa-resharing.proto b/protob/eddsa-resharing.proto
index 0ad299f5..3b646cba 100644
--- a/protob/eddsa-resharing.proto
+++ b/protob/eddsa-resharing.proto
@@ -5,7 +5,7 @@
 // file LICENSE at the root of the source code distribution tree.
 
 syntax = "proto3";
-
+package binance.tsslib.eddsa.resharing;
 option go_package = "eddsa/resharing";
 
 /*
@@ -20,7 +20,7 @@ message DGRound1Message {
 /*
  * The Round 2 "ACK" is broadcast to peers of the Old Committee in this message.
  */
-message DGRound2Message2 {
+message DGRound2Message {
 }
 
 /*
diff --git a/protob/eddsa-signing.proto b/protob/eddsa-signing.proto
index eb795891..b018279e 100644
--- a/protob/eddsa-signing.proto
+++ b/protob/eddsa-signing.proto
@@ -5,7 +5,7 @@
 // file LICENSE at the root of the source code distribution tree.
 
 syntax = "proto3";
-
+package binance.tsslib.eddsa.signing;
 option go_package = "eddsa/signing";
 
 /*
diff --git a/protob/message.proto b/protob/message.proto
index b1f3ce71..707bf039 100644
--- a/protob/message.proto
+++ b/protob/message.proto
@@ -5,7 +5,7 @@
 // file LICENSE at the root of the source code distribution tree.
 
 syntax = "proto3";
-
+package binance.tsslib;
 option go_package = "./tss";
 
 import "google/protobuf/any.proto";
diff --git a/protob/signature.proto b/protob/signature.proto
index 8b58b42a..a7aeeaa9 100644
--- a/protob/signature.proto
+++ b/protob/signature.proto
@@ -6,6 +6,7 @@
 
 syntax = "proto3";
 
+package binance.tsslib;
 option go_package = "./common";
 
 /*
diff --git a/test/_ecdsa_fixtures/keygen_data_0.json b/test/_ecdsa_fixtures/keygen_data_0.json
index 68193732..42e7d0b8 100644
--- a/test/_ecdsa_fixtures/keygen_data_0.json
+++ b/test/_ecdsa_fixtures/keygen_data_0.json
@@ -1 +1,107 @@
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+}
\ No newline at end of file
diff --git a/test/_ecdsa_fixtures/keygen_data_1.json b/test/_ecdsa_fixtures/keygen_data_1.json
index 03911657..3e12a3bf 100644
--- a/test/_ecdsa_fixtures/keygen_data_1.json
+++ b/test/_ecdsa_fixtures/keygen_data_1.json
@@ -1 +1,107 @@
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\ No newline at end of file
diff --git a/test/_ecdsa_fixtures/keygen_data_10.json b/test/_ecdsa_fixtures/keygen_data_10.json
deleted file mode 100644
index 8802b4d8..00000000
--- a/test/_ecdsa_fixtures/keygen_data_10.json
+++ /dev/null
@@ -1 +0,0 @@
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\ No newline at end of file
diff --git a/test/_ecdsa_fixtures/keygen_data_11.json b/test/_ecdsa_fixtures/keygen_data_11.json
deleted file mode 100644
index be6fe093..00000000
--- a/test/_ecdsa_fixtures/keygen_data_11.json
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\ No newline at end of file
diff --git a/test/_ecdsa_fixtures/keygen_data_12.json b/test/_ecdsa_fixtures/keygen_data_12.json
deleted file mode 100644
index 00cee022..00000000
--- a/test/_ecdsa_fixtures/keygen_data_12.json
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\ No newline at end of file
diff --git a/test/_ecdsa_fixtures/keygen_data_13.json b/test/_ecdsa_fixtures/keygen_data_13.json
deleted file mode 100644
index aacc18a2..00000000
--- a/test/_ecdsa_fixtures/keygen_data_13.json
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\ No newline at end of file
diff --git a/test/_ecdsa_fixtures/keygen_data_14.json b/test/_ecdsa_fixtures/keygen_data_14.json
deleted file mode 100644
index 20527681..00000000
--- a/test/_ecdsa_fixtures/keygen_data_14.json
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\ No newline at end of file
diff --git a/test/_ecdsa_fixtures/keygen_data_15.json b/test/_ecdsa_fixtures/keygen_data_15.json
deleted file mode 100644
index ba70a16e..00000000
--- a/test/_ecdsa_fixtures/keygen_data_15.json
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\ No newline at end of file
diff --git a/test/_ecdsa_fixtures/keygen_data_16.json b/test/_ecdsa_fixtures/keygen_data_16.json
deleted file mode 100644
index 0c03a687..00000000
--- a/test/_ecdsa_fixtures/keygen_data_16.json
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\ No newline at end of file
diff --git a/test/_ecdsa_fixtures/keygen_data_17.json b/test/_ecdsa_fixtures/keygen_data_17.json
deleted file mode 100644
index ba5d1c33..00000000
--- a/test/_ecdsa_fixtures/keygen_data_17.json
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\ No newline at end of file
diff --git a/test/_ecdsa_fixtures/keygen_data_18.json b/test/_ecdsa_fixtures/keygen_data_18.json
deleted file mode 100644
index b32dcd5c..00000000
--- a/test/_ecdsa_fixtures/keygen_data_18.json
+++ /dev/null
@@ -1 +0,0 @@
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\ No newline at end of file
diff --git a/test/_ecdsa_fixtures/keygen_data_19.json b/test/_ecdsa_fixtures/keygen_data_19.json
deleted file mode 100644
index 9b88b542..00000000
--- a/test/_ecdsa_fixtures/keygen_data_19.json
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@@ -1 +0,0 @@
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\ No newline at end of file
diff --git a/test/_ecdsa_fixtures/keygen_data_2.json b/test/_ecdsa_fixtures/keygen_data_2.json
index 55cb6e90..6f204be5 100644
--- a/test/_ecdsa_fixtures/keygen_data_2.json
+++ b/test/_ecdsa_fixtures/keygen_data_2.json
@@ -1 +1,107 @@
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+}
\ No newline at end of file
diff --git a/test/_ecdsa_fixtures/keygen_data_3.json b/test/_ecdsa_fixtures/keygen_data_3.json
index cd8fe554..377f5f7a 100644
--- a/test/_ecdsa_fixtures/keygen_data_3.json
+++ b/test/_ecdsa_fixtures/keygen_data_3.json
@@ -1 +1,107 @@
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+}
\ No newline at end of file
diff --git a/test/_ecdsa_fixtures/keygen_data_4.json b/test/_ecdsa_fixtures/keygen_data_4.json
index 7623f2d7..aad49b67 100644
--- a/test/_ecdsa_fixtures/keygen_data_4.json
+++ b/test/_ecdsa_fixtures/keygen_data_4.json
@@ -1 +1,107 @@
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\ No newline at end of file
diff --git a/test/_ecdsa_fixtures/keygen_data_5.json b/test/_ecdsa_fixtures/keygen_data_5.json
deleted file mode 100644
index f3ecdc4f..00000000
--- a/test/_ecdsa_fixtures/keygen_data_5.json
+++ /dev/null
@@ -1 +0,0 @@
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\ No newline at end of file
diff --git a/test/_ecdsa_fixtures/keygen_data_6.json b/test/_ecdsa_fixtures/keygen_data_6.json
deleted file mode 100644
index a86d668c..00000000
--- a/test/_ecdsa_fixtures/keygen_data_6.json
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\ No newline at end of file
diff --git a/test/_ecdsa_fixtures/keygen_data_7.json b/test/_ecdsa_fixtures/keygen_data_7.json
deleted file mode 100644
index d958f9c8..00000000
--- a/test/_ecdsa_fixtures/keygen_data_7.json
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\ No newline at end of file
diff --git a/test/_ecdsa_fixtures/keygen_data_8.json b/test/_ecdsa_fixtures/keygen_data_8.json
deleted file mode 100644
index 7a0ae4f1..00000000
--- a/test/_ecdsa_fixtures/keygen_data_8.json
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\ No newline at end of file
diff --git a/test/_ecdsa_fixtures/keygen_data_9.json b/test/_ecdsa_fixtures/keygen_data_9.json
deleted file mode 100644
index a8de286f..00000000
--- a/test/_ecdsa_fixtures/keygen_data_9.json
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\ No newline at end of file
diff --git a/test/_eddsa_fixtures/keygen_data_0.json b/test/_eddsa_fixtures/keygen_data_0.json
index feeec143..703f8e28 100644
--- a/test/_eddsa_fixtures/keygen_data_0.json
+++ b/test/_eddsa_fixtures/keygen_data_0.json
@@ -1 +1,55 @@
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diff --git a/test/_eddsa_fixtures/keygen_data_1.json b/test/_eddsa_fixtures/keygen_data_1.json
index 4460233d..15970453 100644
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diff --git a/test/_eddsa_fixtures/keygen_data_10.json b/test/_eddsa_fixtures/keygen_data_10.json
deleted file mode 100644
index 637f110a..00000000
--- a/test/_eddsa_fixtures/keygen_data_10.json
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diff --git a/test/_eddsa_fixtures/keygen_data_11.json b/test/_eddsa_fixtures/keygen_data_11.json
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index cfd154ae..00000000
--- a/test/_eddsa_fixtures/keygen_data_11.json
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diff --git a/test/_eddsa_fixtures/keygen_data_12.json b/test/_eddsa_fixtures/keygen_data_12.json
deleted file mode 100644
index 5c0b4d6f..00000000
--- a/test/_eddsa_fixtures/keygen_data_12.json
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diff --git a/test/_eddsa_fixtures/keygen_data_13.json b/test/_eddsa_fixtures/keygen_data_13.json
deleted file mode 100644
index bdc867a3..00000000
--- a/test/_eddsa_fixtures/keygen_data_13.json
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diff --git a/test/_eddsa_fixtures/keygen_data_14.json b/test/_eddsa_fixtures/keygen_data_14.json
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index 27d1d8f4..00000000
--- a/test/_eddsa_fixtures/keygen_data_14.json
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diff --git a/test/_eddsa_fixtures/keygen_data_15.json b/test/_eddsa_fixtures/keygen_data_15.json
deleted file mode 100644
index aa6b2347..00000000
--- a/test/_eddsa_fixtures/keygen_data_15.json
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diff --git a/test/_eddsa_fixtures/keygen_data_16.json b/test/_eddsa_fixtures/keygen_data_16.json
deleted file mode 100644
index e30f5e14..00000000
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diff --git a/test/_eddsa_fixtures/keygen_data_17.json b/test/_eddsa_fixtures/keygen_data_17.json
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index 5c87a0c9..00000000
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diff --git a/test/_eddsa_fixtures/keygen_data_18.json b/test/_eddsa_fixtures/keygen_data_18.json
deleted file mode 100644
index 13647fd9..00000000
--- a/test/_eddsa_fixtures/keygen_data_18.json
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diff --git a/test/_eddsa_fixtures/keygen_data_19.json b/test/_eddsa_fixtures/keygen_data_19.json
deleted file mode 100644
index 76e90ec4..00000000
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diff --git a/test/_eddsa_fixtures/keygen_data_2.json b/test/_eddsa_fixtures/keygen_data_2.json
index be22505a..bace4ce5 100644
--- a/test/_eddsa_fixtures/keygen_data_2.json
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diff --git a/test/_eddsa_fixtures/keygen_data_3.json b/test/_eddsa_fixtures/keygen_data_3.json
index e1e8037d..bd629255 100644
--- a/test/_eddsa_fixtures/keygen_data_3.json
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diff --git a/test/_eddsa_fixtures/keygen_data_4.json b/test/_eddsa_fixtures/keygen_data_4.json
index e57fb5c2..e8d10589 100644
--- a/test/_eddsa_fixtures/keygen_data_4.json
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diff --git a/test/_eddsa_fixtures/keygen_data_5.json b/test/_eddsa_fixtures/keygen_data_5.json
deleted file mode 100644
index 8f7b32a4..00000000
--- a/test/_eddsa_fixtures/keygen_data_5.json
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diff --git a/test/_eddsa_fixtures/keygen_data_6.json b/test/_eddsa_fixtures/keygen_data_6.json
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index 5f4efa22..00000000
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diff --git a/test/_eddsa_fixtures/keygen_data_7.json b/test/_eddsa_fixtures/keygen_data_7.json
deleted file mode 100644
index ed10ea51..00000000
--- a/test/_eddsa_fixtures/keygen_data_7.json
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diff --git a/test/_eddsa_fixtures/keygen_data_8.json b/test/_eddsa_fixtures/keygen_data_8.json
deleted file mode 100644
index ced47850..00000000
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+++ /dev/null
@@ -1 +0,0 @@
-{"Xi":4424331354155150752871085145208343995276421178095495124698480820719825522042,"ShareID":40734138852254171962093726793026483849163144962128892259315105148313993825458,"Ks":[40734138852254171962093726793026483849163144962128892259315105148313993825450,40734138852254171962093726793026483849163144962128892259315105148313993825451,40734138852254171962093726793026483849163144962128892259315105148313993825452,40734138852254171962093726793026483849163144962128892259315105148313993825453,40734138852254171962093726793026483849163144962128892259315105148313993825454,40734138852254171962093726793026483849163144962128892259315105148313993825455,40734138852254171962093726793026483849163144962128892259315105148313993825456,40734138852254171962093726793026483849163144962128892259315105148313993825457,40734138852254171962093726793026483849163144962128892259315105148313993825458,40734138852254171962093726793026483849163144962128892259315105148313993825459,40734138852254171962093726793026483849163144962128892259315105148313993825460,40734138852254171962093726793026483849163144962128892259315105148313993825461,40734138852254171962093726793026483849163144962128892259315105148313993825462,40734138852254171962093726793026483849163144962128892259315105148313993825463,40734138852254171962093726793026483849163144962128892259315105148313993825464,40734138852254171962093726793026483849163144962128892259315105148313993825465,40734138852254171962093726793026483849163144962128892259315105148313993825466,40734138852254171962093726793026483849163144962128892259315105148313993825467,40734138852254171962093726793026483849163144962128892259315105148313993825468,40734138852254171962093726793026483849163144962128892259315105148313993825469],"BigXj":[{"Coords":[29957866551444288658476350454857942692734557351100032691360819157091897571232,36516084228669802171659768461438209556386151343623994887856397017072741988372]},{"Coords":[47405980669639002124687519219913707250293554115260022083522701215817403509702,6956633993610953877720305833332948578423467581354172946924040631226828086263]},{"Coords":[18448325566171282313365171084287037248684936691904749885126674379501353453346,57542808379242682171071366265254456185195752776998290707742666662032232473622]},{"Coords":[798119792817890022465650864894266739550633881670097146590803382931084199002,18741616705198182206589511729301188460657955392768622916582367701785923387424]},{"Coords":[14524065198933915096660983495571495008260235612202009841821241149956652340934,162069773027357354579088193613939754572344398048294401250160042815055523396]},{"Coords":[2391511861628100895088988814765656118369224176176415534794931546222531191393,54978250562078788732535891657909173161508352364458206272900734945726006923944]},{"Coords":[33367545684625665916290843623923194353275614015826572202674111417892161420321,34552418317790324990966929588824151029743376389391432746282019503564426200611]},{"Coords":[453004606432256381667684448461219576328123204931667780295629476469381320335,24202636244659007772676161416986810172809713458728117448473736554568193288470]},{"Coords":[44318728173104604826550003017879014210227013712735183198372207299653903594205,55087473080850843015060234253261358005815826246456261778853783389363296224499]},{"Coords":[5097897464978708021234982103799161978473496892186061915228937112062938960292,39812599820868772665849683762267559082841521300551301780306710760212842213142]},{"Coords":[55801688604275193229895471092959853307614973751632662500004587523688279428992,17908790269314533447122947617750819476463804243432605334549377565373680755876]},{"Coords":[32196451128233400126962687457853805171503763230195900653815988022301169917854,10273285854850198960907924097749326069343899412006196915507281805160302832102]},{"Coords":[26398652979910650230881886450362073218710043900599396151821471419532983149715,3032814692424797993000494058354620844984917462544480255564224802193495430820]},{"Coords":[27236617586105103118624761259021831737235970883376501177552152583376986719238,2786011207236436994120124945804028682728444491790282961909091865945687955840]},{"Coords":[6500269738457737805717018971821598944446826873819309240030153246330846600187,54308477058519174622786176570543012641112928166620722474067812858680268430854]},{"Coords":[4652059627434138465834466819430362335203531466567637962754703362561726860984,18006877504897652595228402160133201981096960017662552547657957601542173068568]},{"Coords":[42705465432401668547671480078970955931365681662524360494488948437573630670729,37242984276081434326327463579899341679142344806501877280538421137197674554811]},{"Coords":[18501735463211215871442136946404860176100300228118646447712783974401612692211,55831398139586339034188706414537302757232734304622486782051369794171579576311]},{"Coords":[7385530367911231668221642462698546652820692326793989938132531831625569287435,12085977429229034609485085920553594147602092630530547749432190844231493145848]},{"Coords":[49366217028906791915740719671679644479230737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\ No newline at end of file
diff --git a/test/_eddsa_fixtures/keygen_data_9.json b/test/_eddsa_fixtures/keygen_data_9.json
deleted file mode 100644
index a7386de2..00000000
--- a/test/_eddsa_fixtures/keygen_data_9.json
+++ /dev/null
@@ -1 +0,0 @@
-{"Xi":4107694223360230897865014039477631043773881150017797542034694187907332099878,"ShareID":40734138852254171962093726793026483849163144962128892259315105148313993825459,"Ks":[40734138852254171962093726793026483849163144962128892259315105148313993825450,40734138852254171962093726793026483849163144962128892259315105148313993825451,40734138852254171962093726793026483849163144962128892259315105148313993825452,40734138852254171962093726793026483849163144962128892259315105148313993825453,40734138852254171962093726793026483849163144962128892259315105148313993825454,40734138852254171962093726793026483849163144962128892259315105148313993825455,40734138852254171962093726793026483849163144962128892259315105148313993825456,40734138852254171962093726793026483849163144962128892259315105148313993825457,40734138852254171962093726793026483849163144962128892259315105148313993825458,40734138852254171962093726793026483849163144962128892259315105148313993825459,40734138852254171962093726793026483849163144962128892259315105148313993825460,40734138852254171962093726793026483849163144962128892259315105148313993825461,40734138852254171962093726793026483849163144962128892259315105148313993825462,40734138852254171962093726793026483849163144962128892259315105148313993825463,40734138852254171962093726793026483849163144962128892259315105148313993825464,40734138852254171962093726793026483849163144962128892259315105148313993825465,40734138852254171962093726793026483849163144962128892259315105148313993825466,40734138852254171962093726793026483849163144962128892259315105148313993825467,40734138852254171962093726793026483849163144962128892259315105148313993825468,40734138852254171962093726793026483849163144962128892259315105148313993825469],"BigXj":[{"Coords":[29957866551444288658476350454857942692734557351100032691360819157091897571232,36516084228669802171659768461438209556386151343623994887856397017072741988372]},{"Coords":[47405980669639002124687519219913707250293554115260022083522701215817403509702,6956633993610953877720305833332948578423467581354172946924040631226828086263]},{"Coords":[18448325566171282313365171084287037248684936691904749885126674379501353453346,57542808379242682171071366265254456185195752776998290707742666662032232473622]},{"Coords":[798119792817890022465650864894266739550633881670097146590803382931084199002,18741616705198182206589511729301188460657955392768622916582367701785923387424]},{"Coords":[14524065198933915096660983495571495008260235612202009841821241149956652340934,162069773027357354579088193613939754572344398048294401250160042815055523396]},{"Coords":[2391511861628100895088988814765656118369224176176415534794931546222531191393,54978250562078788732535891657909173161508352364458206272900734945726006923944]},{"Coords":[33367545684625665916290843623923194353275614015826572202674111417892161420321,34552418317790324990966929588824151029743376389391432746282019503564426200611]},{"Coords":[453004606432256381667684448461219576328123204931667780295629476469381320335,24202636244659007772676161416986810172809713458728117448473736554568193288470]},{"Coords":[44318728173104604826550003017879014210227013712735183198372207299653903594205,55087473080850843015060234253261358005815826246456261778853783389363296224499]},{"Coords":[5097897464978708021234982103799161978473496892186061915228937112062938960292,39812599820868772665849683762267559082841521300551301780306710760212842213142]},{"Coords":[55801688604275193229895471092959853307614973751632662500004587523688279428992,17908790269314533447122947617750819476463804243432605334549377565373680755876]},{"Coords":[32196451128233400126962687457853805171503763230195900653815988022301169917854,10273285854850198960907924097749326069343899412006196915507281805160302832102]},{"Coords":[26398652979910650230881886450362073218710043900599396151821471419532983149715,3032814692424797993000494058354620844984917462544480255564224802193495430820]},{"Coords":[27236617586105103118624761259021831737235970883376501177552152583376986719238,2786011207236436994120124945804028682728444491790282961909091865945687955840]},{"Coords":[6500269738457737805717018971821598944446826873819309240030153246330846600187,54308477058519174622786176570543012641112928166620722474067812858680268430854]},{"Coords":[4652059627434138465834466819430362335203531466567637962754703362561726860984,18006877504897652595228402160133201981096960017662552547657957601542173068568]},{"Coords":[42705465432401668547671480078970955931365681662524360494488948437573630670729,37242984276081434326327463579899341679142344806501877280538421137197674554811]},{"Coords":[18501735463211215871442136946404860176100300228118646447712783974401612692211,55831398139586339034188706414537302757232734304622486782051369794171579576311]},{"Coords":[7385530367911231668221642462698546652820692326793989938132531831625569287435,12085977429229034609485085920553594147602092630530547749432190844231493145848]},{"Coords":[49366217028906791915740719671679644479230737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\ No newline at end of file
diff --git a/test/config.go b/test/config.go
index 4f055032..20e50a21 100644
--- a/test/config.go
+++ b/test/config.go
@@ -9,6 +9,6 @@ package test
 const (
 	// To change these parameters, you must first delete the text fixture files in test/_fixtures/ and then run the keygen test alone.
 	// Then the signing and resharing tests will work with the new n, t configuration using the newly written fixture files.
-	TestParticipants = 20
+	TestParticipants = 5
 	TestThreshold    = TestParticipants / 2
 )
diff --git a/test/utils.go b/test/utils.go
index d47b719b..633d34ec 100644
--- a/test/utils.go
+++ b/test/utils.go
@@ -7,7 +7,7 @@
 package test
 
 import (
-	"github.com/binance-chain/tss-lib/tss"
+	"github.com/bnb-chain/tss-lib/v2/tss"
 )
 
 func SharedPartyUpdater(party tss.Party, msg tss.Message, errCh chan<- *tss.Error) {
diff --git a/tss/curve.go b/tss/curve.go
index 1aded0d2..983a9361 100644
--- a/tss/curve.go
+++ b/tss/curve.go
@@ -9,17 +9,66 @@ package tss
 import (
 	"crypto/elliptic"
 	"errors"
+	"reflect"
 
-	s256k1 "github.com/btcsuite/btcd/btcec"
+	s256k1 "github.com/btcsuite/btcd/btcec/v2"
+	"github.com/decred/dcrd/dcrec/edwards/v2"
+)
+
+type CurveName string
+
+const (
+	Secp256k1 CurveName = "secp256k1"
+	Ed25519   CurveName = "ed25519"
 )
 
 var (
-	ec elliptic.Curve
+	ec       elliptic.Curve
+	registry map[CurveName]elliptic.Curve
 )
 
 // Init default curve (secp256k1)
 func init() {
 	ec = s256k1.S256()
+
+	registry = make(map[CurveName]elliptic.Curve)
+	registry[Secp256k1] = s256k1.S256()
+	registry[Ed25519] = edwards.Edwards()
+}
+
+func RegisterCurve(name CurveName, curve elliptic.Curve) {
+	registry[name] = curve
+}
+
+// return curve, exist(bool)
+func GetCurveByName(name CurveName) (elliptic.Curve, bool) {
+	if val, exist := registry[name]; exist {
+		return val, true
+	}
+
+	return nil, false
+}
+
+// return name, exist(bool)
+func GetCurveName(curve elliptic.Curve) (CurveName, bool) {
+	for name, e := range registry {
+		if reflect.TypeOf(curve) == reflect.TypeOf(e) {
+			return name, true
+		}
+	}
+
+	return "", false
+}
+
+// SameCurve returns true if both lhs and rhs are the same known curve
+func SameCurve(lhs, rhs elliptic.Curve) bool {
+	lName, lOk := GetCurveName(lhs)
+	rName, rOk := GetCurveName(rhs)
+	if lOk && rOk {
+		return lName == rName
+	}
+	// if lhs/rhs not exist, return false
+	return false
 }
 
 // EC returns the current elliptic curve in use. The default is secp256k1
@@ -28,9 +77,19 @@ func EC() elliptic.Curve {
 }
 
 // SetCurve sets the curve used by TSS. Must be called before Start. The default is secp256k1
+// Deprecated
 func SetCurve(curve elliptic.Curve) {
 	if curve == nil {
 		panic(errors.New("SetCurve received a nil curve"))
 	}
 	ec = curve
 }
+
+// secp256k1
+func S256() elliptic.Curve {
+	return s256k1.S256()
+}
+
+func Edwards() elliptic.Curve {
+	return edwards.Edwards()
+}
diff --git a/tss/message.go b/tss/message.go
index 222e6ad3..acb4a6ec 100644
--- a/tss/message.go
+++ b/tss/message.go
@@ -9,8 +9,8 @@ package tss
 import (
 	"fmt"
 
-	"github.com/golang/protobuf/proto"
-	"github.com/golang/protobuf/ptypes"
+	"google.golang.org/protobuf/proto"
+	"google.golang.org/protobuf/types/known/anypb"
 )
 
 type (
@@ -81,7 +81,7 @@ var (
 // NewMessageWrapper constructs a MessageWrapper from routing metadata and content
 func NewMessageWrapper(routing MessageRouting, content MessageContent) *MessageWrapper {
 	// marshal the content to the ProtoBuf Any type
-	any, _ := ptypes.MarshalAny(content)
+	any, _ := anypb.New(content)
 	// convert given PartyIDs to the wire format
 	var to []*MessageWrapper_PartyID
 	if routing.To != nil {
@@ -111,7 +111,7 @@ func NewMessage(meta MessageRouting, content MessageContent, wire *MessageWrappe
 }
 
 func (mm *MessageImpl) Type() string {
-	return proto.MessageName(mm.content)
+	return string(proto.MessageName(mm.content))
 }
 
 func (mm *MessageImpl) GetTo() []*PartyID {
diff --git a/tss/message.pb.go b/tss/message.pb.go
index 8bc51645..df58ef38 100644
--- a/tss/message.pb.go
+++ b/tss/message.pb.go
@@ -1,35 +1,45 @@
+// Copyright © 2019 Binance
+//
+// This file is part of Binance. The full Binance copyright notice, including
+// terms governing use, modification, and redistribution, is contained in the
+// file LICENSE at the root of the source code distribution tree.
+
 // Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.27.1
+// 	protoc        v3.14.0
 // source: protob/message.proto
 
 package tss
 
 import (
-	fmt "fmt"
-	proto "github.com/golang/protobuf/proto"
-	any "github.com/golang/protobuf/ptypes/any"
-	math "math"
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	anypb "google.golang.org/protobuf/types/known/anypb"
+	reflect "reflect"
+	sync "sync"
 )
 
-// Reference imports to suppress errors if they are not otherwise used.
-var _ = proto.Marshal
-var _ = fmt.Errorf
-var _ = math.Inf
-
-// This is a compile-time assertion to ensure that this generated file
-// is compatible with the proto package it is being compiled against.
-// A compilation error at this line likely means your copy of the
-// proto package needs to be updated.
-const _ = proto.ProtoPackageIsVersion3 // please upgrade the proto package
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
 
 //
 // Wrapper for TSS messages, often read by the transport layer and not itself sent over the wire
 type MessageWrapper struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
 	// Metadata optionally un-marshalled and used by the transport to route this message.
 	IsBroadcast bool `protobuf:"varint,1,opt,name=is_broadcast,json=isBroadcast,proto3" json:"is_broadcast,omitempty"`
 	// Metadata optionally un-marshalled and used by the transport to route this message.
-	IsToOldCommittee bool `protobuf:"varint,2,opt,name=is_to_old_committee,json=isToOldCommittee,proto3" json:"is_to_old_committee,omitempty"`
+	IsToOldCommittee bool `protobuf:"varint,2,opt,name=is_to_old_committee,json=isToOldCommittee,proto3" json:"is_to_old_committee,omitempty"` // used only in certain resharing messages
 	// Metadata optionally un-marshalled and used by the transport to route this message.
-	IsToOldAndNewCommittees bool `protobuf:"varint,5,opt,name=is_to_old_and_new_committees,json=isToOldAndNewCommittees,proto3" json:"is_to_old_and_new_committees,omitempty"`
+	IsToOldAndNewCommittees bool `protobuf:"varint,5,opt,name=is_to_old_and_new_committees,json=isToOldAndNewCommittees,proto3" json:"is_to_old_and_new_committees,omitempty"` // used only in certain resharing messages
 	// Metadata optionally un-marshalled and used by the transport to route this message.
 	From *MessageWrapper_PartyID `protobuf:"bytes,3,opt,name=from,proto3" json:"from,omitempty"`
 	// Metadata optionally un-marshalled and used by the transport to route this message.
@@ -37,75 +47,79 @@ type MessageWrapper struct {
 	// This field is actually what is sent through the wire and consumed on the other end by UpdateFromBytes.
 	// An Any contains an arbitrary serialized message as bytes, along with a URL that
 	// acts as a globally unique identifier for and resolves to that message's type.
-	Message              *any.Any `protobuf:"bytes,10,opt,name=message,proto3" json:"message,omitempty"`
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
+	Message *anypb.Any `protobuf:"bytes,10,opt,name=message,proto3" json:"message,omitempty"`
 }
 
-func (m *MessageWrapper) Reset()         { *m = MessageWrapper{} }
-func (m *MessageWrapper) String() string { return proto.CompactTextString(m) }
-func (*MessageWrapper) ProtoMessage()    {}
-func (*MessageWrapper) Descriptor() ([]byte, []int) {
-	return fileDescriptor_5be430ad0e7f3d12, []int{0}
+func (x *MessageWrapper) Reset() {
+	*x = MessageWrapper{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_protob_message_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
 }
 
-func (m *MessageWrapper) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_MessageWrapper.Unmarshal(m, b)
-}
-func (m *MessageWrapper) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_MessageWrapper.Marshal(b, m, deterministic)
-}
-func (m *MessageWrapper) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_MessageWrapper.Merge(m, src)
-}
-func (m *MessageWrapper) XXX_Size() int {
-	return xxx_messageInfo_MessageWrapper.Size(m)
+func (x *MessageWrapper) String() string {
+	return protoimpl.X.MessageStringOf(x)
 }
-func (m *MessageWrapper) XXX_DiscardUnknown() {
-	xxx_messageInfo_MessageWrapper.DiscardUnknown(m)
+
+func (*MessageWrapper) ProtoMessage() {}
+
+func (x *MessageWrapper) ProtoReflect() protoreflect.Message {
+	mi := &file_protob_message_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
 }
 
-var xxx_messageInfo_MessageWrapper proto.InternalMessageInfo
+// Deprecated: Use MessageWrapper.ProtoReflect.Descriptor instead.
+func (*MessageWrapper) Descriptor() ([]byte, []int) {
+	return file_protob_message_proto_rawDescGZIP(), []int{0}
+}
 
-func (m *MessageWrapper) GetIsBroadcast() bool {
-	if m != nil {
-		return m.IsBroadcast
+func (x *MessageWrapper) GetIsBroadcast() bool {
+	if x != nil {
+		return x.IsBroadcast
 	}
 	return false
 }
 
-func (m *MessageWrapper) GetIsToOldCommittee() bool {
-	if m != nil {
-		return m.IsToOldCommittee
+func (x *MessageWrapper) GetIsToOldCommittee() bool {
+	if x != nil {
+		return x.IsToOldCommittee
 	}
 	return false
 }
 
-func (m *MessageWrapper) GetIsToOldAndNewCommittees() bool {
-	if m != nil {
-		return m.IsToOldAndNewCommittees
+func (x *MessageWrapper) GetIsToOldAndNewCommittees() bool {
+	if x != nil {
+		return x.IsToOldAndNewCommittees
 	}
 	return false
 }
 
-func (m *MessageWrapper) GetFrom() *MessageWrapper_PartyID {
-	if m != nil {
-		return m.From
+func (x *MessageWrapper) GetFrom() *MessageWrapper_PartyID {
+	if x != nil {
+		return x.From
 	}
 	return nil
 }
 
-func (m *MessageWrapper) GetTo() []*MessageWrapper_PartyID {
-	if m != nil {
-		return m.To
+func (x *MessageWrapper) GetTo() []*MessageWrapper_PartyID {
+	if x != nil {
+		return x.To
 	}
 	return nil
 }
 
-func (m *MessageWrapper) GetMessage() *any.Any {
-	if m != nil {
-		return m.Message
+func (x *MessageWrapper) GetMessage() *anypb.Any {
+	if x != nil {
+		return x.Message
 	}
 	return nil
 }
@@ -114,86 +128,180 @@ func (m *MessageWrapper) GetMessage() *any.Any {
 // Note: The `id` and `moniker` are provided for convenience to allow you to track participants easier.
 // The `id` is intended to be a unique string representation of `key` and `moniker` can be anything (even left blank).
 type MessageWrapper_PartyID struct {
-	Id                   string   `protobuf:"bytes,1,opt,name=id,proto3" json:"id,omitempty"`
-	Moniker              string   `protobuf:"bytes,2,opt,name=moniker,proto3" json:"moniker,omitempty"`
-	Key                  []byte   `protobuf:"bytes,3,opt,name=key,proto3" json:"key,omitempty"`
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
-}
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
 
-func (m *MessageWrapper_PartyID) Reset()         { *m = MessageWrapper_PartyID{} }
-func (m *MessageWrapper_PartyID) String() string { return proto.CompactTextString(m) }
-func (*MessageWrapper_PartyID) ProtoMessage()    {}
-func (*MessageWrapper_PartyID) Descriptor() ([]byte, []int) {
-	return fileDescriptor_5be430ad0e7f3d12, []int{0, 0}
+	Id      string `protobuf:"bytes,1,opt,name=id,proto3" json:"id,omitempty"`
+	Moniker string `protobuf:"bytes,2,opt,name=moniker,proto3" json:"moniker,omitempty"`
+	Key     []byte `protobuf:"bytes,3,opt,name=key,proto3" json:"key,omitempty"`
 }
 
-func (m *MessageWrapper_PartyID) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_MessageWrapper_PartyID.Unmarshal(m, b)
-}
-func (m *MessageWrapper_PartyID) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_MessageWrapper_PartyID.Marshal(b, m, deterministic)
-}
-func (m *MessageWrapper_PartyID) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_MessageWrapper_PartyID.Merge(m, src)
+func (x *MessageWrapper_PartyID) Reset() {
+	*x = MessageWrapper_PartyID{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_protob_message_proto_msgTypes[1]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
 }
-func (m *MessageWrapper_PartyID) XXX_Size() int {
-	return xxx_messageInfo_MessageWrapper_PartyID.Size(m)
+
+func (x *MessageWrapper_PartyID) String() string {
+	return protoimpl.X.MessageStringOf(x)
 }
-func (m *MessageWrapper_PartyID) XXX_DiscardUnknown() {
-	xxx_messageInfo_MessageWrapper_PartyID.DiscardUnknown(m)
+
+func (*MessageWrapper_PartyID) ProtoMessage() {}
+
+func (x *MessageWrapper_PartyID) ProtoReflect() protoreflect.Message {
+	mi := &file_protob_message_proto_msgTypes[1]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
 }
 
-var xxx_messageInfo_MessageWrapper_PartyID proto.InternalMessageInfo
+// Deprecated: Use MessageWrapper_PartyID.ProtoReflect.Descriptor instead.
+func (*MessageWrapper_PartyID) Descriptor() ([]byte, []int) {
+	return file_protob_message_proto_rawDescGZIP(), []int{0, 0}
+}
 
-func (m *MessageWrapper_PartyID) GetId() string {
-	if m != nil {
-		return m.Id
+func (x *MessageWrapper_PartyID) GetId() string {
+	if x != nil {
+		return x.Id
 	}
 	return ""
 }
 
-func (m *MessageWrapper_PartyID) GetMoniker() string {
-	if m != nil {
-		return m.Moniker
+func (x *MessageWrapper_PartyID) GetMoniker() string {
+	if x != nil {
+		return x.Moniker
 	}
 	return ""
 }
 
-func (m *MessageWrapper_PartyID) GetKey() []byte {
-	if m != nil {
-		return m.Key
+func (x *MessageWrapper_PartyID) GetKey() []byte {
+	if x != nil {
+		return x.Key
 	}
 	return nil
 }
 
-func init() {
-	proto.RegisterType((*MessageWrapper)(nil), "MessageWrapper")
-	proto.RegisterType((*MessageWrapper_PartyID)(nil), "MessageWrapper.PartyID")
-}
-
-func init() { proto.RegisterFile("protob/message.proto", fileDescriptor_5be430ad0e7f3d12) }
-
-var fileDescriptor_5be430ad0e7f3d12 = []byte{
-	// 297 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x7c, 0x90, 0x4f, 0x4b, 0x33, 0x31,
-	0x10, 0x87, 0x69, 0xda, 0xbe, 0xfb, 0x76, 0x5a, 0x4a, 0x89, 0x85, 0xc6, 0xe2, 0xa1, 0x7a, 0xb1,
-	0x20, 0x66, 0x41, 0xcf, 0x1e, 0x5a, 0xf5, 0xe0, 0xc1, 0x3f, 0x04, 0x41, 0xf0, 0xb2, 0xa4, 0x4d,
-	0x5a, 0x42, 0xbb, 0x99, 0x92, 0x44, 0xca, 0x7e, 0x69, 0x3f, 0x83, 0x98, 0xdd, 0xb5, 0x78, 0xf1,
-	0x96, 0x99, 0x79, 0x7e, 0x99, 0xe1, 0x81, 0xe1, 0xce, 0x61, 0xc0, 0x45, 0x9a, 0x6b, 0xef, 0xe5,
-	0x5a, 0xf3, 0x58, 0x8e, 0x8f, 0xd7, 0x88, 0xeb, 0xad, 0x4e, 0xcb, 0xe1, 0xc7, 0x2a, 0x95, 0xb6,
-	0x28, 0x47, 0x67, 0x9f, 0x04, 0xfa, 0x8f, 0x25, 0xfc, 0xe6, 0xe4, 0x6e, 0xa7, 0x1d, 0x3d, 0x85,
-	0x9e, 0xf1, 0xd9, 0xc2, 0xa1, 0x54, 0x4b, 0xe9, 0x03, 0x6b, 0x4c, 0x1a, 0xd3, 0xff, 0xa2, 0x6b,
-	0xfc, 0xbc, 0x6e, 0xd1, 0x4b, 0x38, 0x32, 0x3e, 0x0b, 0x98, 0xe1, 0x56, 0x65, 0x4b, 0xcc, 0x73,
-	0x13, 0x82, 0xd6, 0x8c, 0x44, 0x72, 0x60, 0xfc, 0x2b, 0x3e, 0x6f, 0xd5, 0x6d, 0xdd, 0xa7, 0x37,
-	0x70, 0x72, 0xc0, 0xa5, 0x55, 0x99, 0xd5, 0xfb, 0x43, 0xcc, 0xb3, 0x76, 0xcc, 0x8d, 0xaa, 0xdc,
-	0xcc, 0xaa, 0x27, 0xbd, 0xff, 0x49, 0x7b, 0x7a, 0x01, 0xad, 0x95, 0xc3, 0x9c, 0x35, 0x27, 0x8d,
-	0x69, 0xf7, 0x6a, 0xc4, 0x7f, 0xdf, 0xcb, 0x5f, 0xa4, 0x0b, 0xc5, 0xc3, 0x9d, 0x88, 0x10, 0x3d,
-	0x07, 0x12, 0x90, 0xb5, 0x26, 0xcd, 0xbf, 0x50, 0x12, 0x90, 0x72, 0x48, 0x2a, 0x4b, 0x0c, 0xe2,
-	0xc7, 0x43, 0x5e, 0x6a, 0xe2, 0xb5, 0x26, 0x3e, 0xb3, 0x85, 0xa8, 0xa1, 0xf1, 0x3d, 0x24, 0x55,
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-	0xff, 0xac, 0xdd, 0x4e, 0x90, 0xb3, 0x01, 0x00, 0x00,
+var File_protob_message_proto protoreflect.FileDescriptor
+
+var file_protob_message_proto_rawDesc = []byte{
+	0x0a, 0x14, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x62, 0x2f, 0x6d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65,
+	0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x12, 0x0e, 0x62, 0x69, 0x6e, 0x61, 0x6e, 0x63, 0x65, 0x2e,
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+	0x73, 0x61, 0x67, 0x65, 0x18, 0x0a, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x14, 0x2e, 0x67, 0x6f, 0x6f,
+	0x67, 0x6c, 0x65, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x62, 0x75, 0x66, 0x2e, 0x41, 0x6e, 0x79,
+	0x52, 0x07, 0x6d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x1a, 0x45, 0x0a, 0x07, 0x50, 0x61, 0x72,
+	0x74, 0x79, 0x49, 0x44, 0x12, 0x0e, 0x0a, 0x02, 0x69, 0x64, 0x18, 0x01, 0x20, 0x01, 0x28, 0x09,
+	0x52, 0x02, 0x69, 0x64, 0x12, 0x18, 0x0a, 0x07, 0x6d, 0x6f, 0x6e, 0x69, 0x6b, 0x65, 0x72, 0x18,
+	0x02, 0x20, 0x01, 0x28, 0x09, 0x52, 0x07, 0x6d, 0x6f, 0x6e, 0x69, 0x6b, 0x65, 0x72, 0x12, 0x10,
+	0x0a, 0x03, 0x6b, 0x65, 0x79, 0x18, 0x03, 0x20, 0x01, 0x28, 0x0c, 0x52, 0x03, 0x6b, 0x65, 0x79,
+	0x42, 0x07, 0x5a, 0x05, 0x2e, 0x2f, 0x74, 0x73, 0x73, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f,
+	0x33,
+}
+
+var (
+	file_protob_message_proto_rawDescOnce sync.Once
+	file_protob_message_proto_rawDescData = file_protob_message_proto_rawDesc
+)
+
+func file_protob_message_proto_rawDescGZIP() []byte {
+	file_protob_message_proto_rawDescOnce.Do(func() {
+		file_protob_message_proto_rawDescData = protoimpl.X.CompressGZIP(file_protob_message_proto_rawDescData)
+	})
+	return file_protob_message_proto_rawDescData
+}
+
+var file_protob_message_proto_msgTypes = make([]protoimpl.MessageInfo, 2)
+var file_protob_message_proto_goTypes = []interface{}{
+	(*MessageWrapper)(nil),         // 0: binance.tsslib.MessageWrapper
+	(*MessageWrapper_PartyID)(nil), // 1: binance.tsslib.MessageWrapper.PartyID
+	(*anypb.Any)(nil),              // 2: google.protobuf.Any
+}
+var file_protob_message_proto_depIdxs = []int32{
+	1, // 0: binance.tsslib.MessageWrapper.from:type_name -> binance.tsslib.MessageWrapper.PartyID
+	1, // 1: binance.tsslib.MessageWrapper.to:type_name -> binance.tsslib.MessageWrapper.PartyID
+	2, // 2: binance.tsslib.MessageWrapper.message:type_name -> google.protobuf.Any
+	3, // [3:3] is the sub-list for method output_type
+	3, // [3:3] is the sub-list for method input_type
+	3, // [3:3] is the sub-list for extension type_name
+	3, // [3:3] is the sub-list for extension extendee
+	0, // [0:3] is the sub-list for field type_name
+}
+
+func init() { file_protob_message_proto_init() }
+func file_protob_message_proto_init() {
+	if File_protob_message_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_protob_message_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*MessageWrapper); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_protob_message_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*MessageWrapper_PartyID); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_protob_message_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   2,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_protob_message_proto_goTypes,
+		DependencyIndexes: file_protob_message_proto_depIdxs,
+		MessageInfos:      file_protob_message_proto_msgTypes,
+	}.Build()
+	File_protob_message_proto = out.File
+	file_protob_message_proto_rawDesc = nil
+	file_protob_message_proto_goTypes = nil
+	file_protob_message_proto_depIdxs = nil
 }
diff --git a/tss/params.go b/tss/params.go
index 2289f687..114f4848 100644
--- a/tss/params.go
+++ b/tss/params.go
@@ -7,17 +7,25 @@
 package tss
 
 import (
-	"errors"
+	"crypto/elliptic"
+	"runtime"
 	"time"
 )
 
 type (
 	Parameters struct {
+		ec                  elliptic.Curve
 		partyID             *PartyID
 		parties             *PeerContext
 		partyCount          int
 		threshold           int
+		concurrency         int
 		safePrimeGenTimeout time.Duration
+		// proof session info
+		nonce int
+		// for keygen
+		noProofMod bool
+		noProofFac bool
 	}
 
 	ReSharingParameters struct {
@@ -33,25 +41,22 @@ const (
 )
 
 // Exported, used in `tss` client
-func NewParameters(ctx *PeerContext, partyID *PartyID, partyCount, threshold int, optionalSafePrimeGenTimeout ...time.Duration) *Parameters {
-	var safePrimeGenTimeout time.Duration
-	if 0 < len(optionalSafePrimeGenTimeout) {
-		if 1 < len(optionalSafePrimeGenTimeout) {
-			panic(errors.New("GeneratePreParams: expected 0 or 1 item in `optionalSafePrimeGenTimeout`"))
-		}
-		safePrimeGenTimeout = optionalSafePrimeGenTimeout[0]
-	} else {
-		safePrimeGenTimeout = defaultSafePrimeGenTimeout
-	}
+func NewParameters(ec elliptic.Curve, ctx *PeerContext, partyID *PartyID, partyCount, threshold int) *Parameters {
 	return &Parameters{
+		ec:                  ec,
 		parties:             ctx,
 		partyID:             partyID,
 		partyCount:          partyCount,
 		threshold:           threshold,
-		safePrimeGenTimeout: safePrimeGenTimeout,
+		concurrency:         runtime.GOMAXPROCS(0),
+		safePrimeGenTimeout: defaultSafePrimeGenTimeout,
 	}
 }
 
+func (params *Parameters) EC() elliptic.Curve {
+	return params.ec
+}
+
 func (params *Parameters) Parties() *PeerContext {
 	return params.parties
 }
@@ -68,15 +73,44 @@ func (params *Parameters) Threshold() int {
 	return params.threshold
 }
 
+func (params *Parameters) Concurrency() int {
+	return params.concurrency
+}
+
 func (params *Parameters) SafePrimeGenTimeout() time.Duration {
 	return params.safePrimeGenTimeout
 }
 
+// The concurrency level must be >= 1.
+func (params *Parameters) SetConcurrency(concurrency int) {
+	params.concurrency = concurrency
+}
+
+func (params *Parameters) SetSafePrimeGenTimeout(timeout time.Duration) {
+	params.safePrimeGenTimeout = timeout
+}
+
+func (params *Parameters) NoProofMod() bool {
+	return params.noProofMod
+}
+
+func (params *Parameters) NoProofFac() bool {
+	return params.noProofFac
+}
+
+func (params *Parameters) SetNoProofMod() {
+	params.noProofMod = true
+}
+
+func (params *Parameters) SetNoProofFac() {
+	params.noProofFac = true
+}
+
 // ----- //
 
 // Exported, used in `tss` client
-func NewReSharingParameters(ctx, newCtx *PeerContext, partyID *PartyID, partyCount, threshold, newPartyCount, newThreshold int) *ReSharingParameters {
-	params := NewParameters(ctx, partyID, partyCount, threshold)
+func NewReSharingParameters(ec elliptic.Curve, ctx, newCtx *PeerContext, partyID *PartyID, partyCount, threshold, newPartyCount, newThreshold int) *ReSharingParameters {
+	params := NewParameters(ec, ctx, partyID, partyCount, threshold)
 	return &ReSharingParameters{
 		Parameters:    params,
 		newParties:    newCtx,
diff --git a/tss/party.go b/tss/party.go
index 5580dbe0..210405b3 100644
--- a/tss/party.go
+++ b/tss/party.go
@@ -11,7 +11,7 @@ import (
 	"fmt"
 	"sync"
 
-	"github.com/binance-chain/tss-lib/common"
+	"github.com/bnb-chain/tss-lib/v2/common"
 )
 
 type Party interface {
@@ -79,7 +79,11 @@ func (p *BaseParty) ValidateMessage(msg ParsedMessage) (bool, *Error) {
 }
 
 func (p *BaseParty) String() string {
-	return fmt.Sprintf("round: %d", p.round().RoundNumber())
+	if rnd :=  p.round(); rnd != nil {
+		return fmt.Sprintf("round: %d",rnd.RoundNumber())
+	}
+
+	return "No more rounds"
 }
 
 // -----
diff --git a/tss/party_id.go b/tss/party_id.go
index 49357d0d..e21c9310 100644
--- a/tss/party_id.go
+++ b/tss/party_id.go
@@ -11,7 +11,7 @@ import (
 	"math/big"
 	"sort"
 
-	"github.com/binance-chain/tss-lib/common"
+	"github.com/bnb-chain/tss-lib/v2/common"
 )
 
 type (
diff --git a/tss/wire.go b/tss/wire.go
index bb9234ba..bc24df50 100644
--- a/tss/wire.go
+++ b/tss/wire.go
@@ -8,21 +8,14 @@ package tss
 
 import (
 	"errors"
-
-	"github.com/golang/protobuf/proto"
-	"github.com/golang/protobuf/ptypes"
-	"github.com/golang/protobuf/ptypes/any"
-)
-
-const (
-	ECDSAProtoNamePrefix = "binance.tss-lib.ecdsa."
-	EDDSAProtoNamePrefix = "binance.tss-lib.eddsa."
+	"google.golang.org/protobuf/proto"
+	"google.golang.org/protobuf/types/known/anypb"
 )
 
 // Used externally to update a LocalParty with a valid ParsedMessage
 func ParseWireMessage(wireBytes []byte, from *PartyID, isBroadcast bool) (ParsedMessage, error) {
 	wire := new(MessageWrapper)
-	wire.Message = new(any.Any)
+	wire.Message = new(anypb.Any)
 	wire.From = from.MessageWrapper_PartyID
 	wire.IsBroadcast = isBroadcast
 	if err := proto.Unmarshal(wireBytes, wire.Message); err != nil {
@@ -32,15 +25,15 @@ func ParseWireMessage(wireBytes []byte, from *PartyID, isBroadcast bool) (Parsed
 }
 
 func parseWrappedMessage(wire *MessageWrapper, from *PartyID) (ParsedMessage, error) {
-	var any ptypes.DynamicAny
+	m, err := wire.Message.UnmarshalNew()
+	if err != nil {
+		return nil, err
+	}
 	meta := MessageRouting{
 		From:        from,
 		IsBroadcast: wire.IsBroadcast,
 	}
-	if err := ptypes.UnmarshalAny(wire.Message, &any); err != nil {
-		return nil, err
-	}
-	if content, ok := any.Message.(MessageContent); ok {
+	if content, ok := m.(MessageContent); ok {
 		return NewMessage(meta, content, wire), nil
 	}
 	return nil, errors.New("ParseWireMessage: the message contained unknown content")