diff --git a/circuits/circuits/dsc/dsc_rsa_65537_sha1.circom b/circuits/circuits/dsc/dsc_rsa_65537_sha1.circom
index c164f1c5..7d67e3cd 100644
--- a/circuits/circuits/dsc/dsc_rsa_65537_sha1.circom
+++ b/circuits/circuits/dsc/dsc_rsa_65537_sha1.circom
@@ -9,7 +9,7 @@ include "../utils/Sha1Bytes.circom";
 include "../utils/leafHasherLight.circom";
 include "../utils/rsaPkcs1.circom";
 
-template DSC_RSA_65537_SHA1(max_cert_bytes, n_dsc, k_dsc, n_csca, k_csca, dsc_mod_len, nLevels ) {
+template DSC_RSA_65537_SHA1(max_cert_bytes, n_dsc, k_dsc, n_csca, k_csca, dsc_mod_len, nLevels, signatureAlgorithm) {
     signal input raw_dsc_cert[max_cert_bytes]; 
     signal input raw_dsc_cert_padded_bytes;
     signal input csca_modulus[k_csca];
@@ -25,9 +25,10 @@ template DSC_RSA_65537_SHA1(max_cert_bytes, n_dsc, k_dsc, n_csca, k_csca, dsc_mo
     signal output blinded_dsc_commitment;
 
     //verify the leaf
-    component leafHasherLight = LeafHasherLight(k_csca);
-    leafHasherLight.in <== csca_modulus;
-    signal leaf <== leafHasherLight.out;
+    component leafHasher = LeafHasherLightWithSigAlg(k_csca);
+    leafHasher.sigAlg <== signatureAlgorithm;
+    leafHasher.in <== csca_modulus;
+    signal leaf <== leafHasher.out;
 
 
     signal computed_merkle_root <== BinaryMerkleRoot(nLevels)(leaf, nLevels, path, siblings);
diff --git a/circuits/circuits/dsc/dsc_rsa_65537_sha256.circom b/circuits/circuits/dsc/dsc_rsa_65537_sha256.circom
index ba51e0dd..9a3184f8 100644
--- a/circuits/circuits/dsc/dsc_rsa_65537_sha256.circom
+++ b/circuits/circuits/dsc/dsc_rsa_65537_sha256.circom
@@ -10,7 +10,7 @@ include "../utils/splitBytesToWords.circom";
 include "../utils/splitSignalsToWords.circom";
 include "../utils/leafHasherLight.circom";
 
-template DSC_RSA_65537_SHA256(max_cert_bytes, n_dsc, k_dsc, n_csca, k_csca, dsc_mod_len, nLevels ) {
+template DSC_RSA_65537_SHA256(max_cert_bytes, n_dsc, k_dsc, n_csca, k_csca, dsc_mod_len, nLevels, signatureAlgorithm) {
     signal input raw_dsc_cert[max_cert_bytes]; 
     signal input raw_dsc_cert_padded_bytes;
     signal input csca_modulus[k_csca];
@@ -25,9 +25,11 @@ template DSC_RSA_65537_SHA256(max_cert_bytes, n_dsc, k_dsc, n_csca, k_csca, dsc_
 
     signal output blinded_dsc_commitment;
 
-    component leafHasherLight = LeafHasherLight(k_csca);
-    leafHasherLight.in <== csca_modulus;
-    signal leaf <== leafHasherLight.out;
+    //verify the leaf
+    component leafHasher = LeafHasherLightWithSigAlg(k_csca);
+    leafHasher.sigAlg <== signatureAlgorithm;
+    leafHasher.in <== csca_modulus;
+    signal leaf <== leafHasher.out;
 
 
     signal computed_merkle_root <== BinaryMerkleRoot(nLevels)(leaf, nLevels, path, siblings);
diff --git a/circuits/circuits/dsc/dsc_rsapss_65537_sha256.circom b/circuits/circuits/dsc/dsc_rsapss_65537_sha256.circom
index 79b2c81f..e44cf62d 100644
--- a/circuits/circuits/dsc/dsc_rsapss_65537_sha256.circom
+++ b/circuits/circuits/dsc/dsc_rsapss_65537_sha256.circom
@@ -10,7 +10,7 @@ include "../utils/splitSignalsToWords.circom";
 include "../utils/leafHasherLight.circom";
 include "../utils/rsapss/rsapss.circom";
 
-template DSC_RSAPSS_65537_SHA256(max_cert_bytes, n_dsc, k_dsc, n_csca, k_csca, modulus_bits_size, dsc_mod_len, nLevels ) {
+template DSC_RSAPSS_65537_SHA256(max_cert_bytes, n_dsc, k_dsc, n_csca, k_csca, modulus_bits_size, dsc_mod_len, nLevels, signatureAlgorithm) {
     signal input raw_dsc_cert[max_cert_bytes]; 
     signal input raw_dsc_cert_padded_bytes;
     signal input csca_modulus[k_csca];
@@ -25,10 +25,11 @@ template DSC_RSAPSS_65537_SHA256(max_cert_bytes, n_dsc, k_dsc, n_csca, k_csca, m
 
     signal output blinded_dsc_commitment;
 
-    // verify the leaf
-    component leafHasherLight = LeafHasherLight(k_csca);
-    leafHasherLight.in <== csca_modulus;
-    signal leaf <== leafHasherLight.out;
+    //verify the leaf
+    component leafHasher = LeafHasherLightWithSigAlg(k_csca);
+    leafHasher.sigAlg <== signatureAlgorithm;
+    leafHasher.in <== csca_modulus;
+    signal leaf <== leafHasher.out;
 
     signal computed_merkle_root <== BinaryMerkleRoot(nLevels)(leaf, nLevels, path, siblings);
     merkle_root === computed_merkle_root;
diff --git a/circuits/circuits/tests/dsc/dsc_sha1_rsa_2048.circom b/circuits/circuits/tests/dsc/dsc_sha1_rsa_2048.circom
index 6b11e35c..c588f208 100644
--- a/circuits/circuits/tests/dsc/dsc_sha1_rsa_2048.circom
+++ b/circuits/circuits/tests/dsc/dsc_sha1_rsa_2048.circom
@@ -2,4 +2,4 @@ pragma circom  2.1.6;
 
 include "../../dsc/dsc_rsa_65537_sha1.circom";
 
-component main { public [ merkle_root ] } = DSC_RSA_65537_SHA1(960, 64, 32, 64, 32, 256, 12);
\ No newline at end of file
+component main { public [ merkle_root ] } = DSC_RSA_65537_SHA1(960, 64, 32, 64, 32, 256, 12, 3);
\ No newline at end of file
diff --git a/circuits/circuits/tests/dsc/dsc_sha256_rsa_2048.circom b/circuits/circuits/tests/dsc/dsc_sha256_rsa_2048.circom
index 3150cecf..b914e90b 100644
--- a/circuits/circuits/tests/dsc/dsc_sha256_rsa_2048.circom
+++ b/circuits/circuits/tests/dsc/dsc_sha256_rsa_2048.circom
@@ -2,4 +2,4 @@ pragma circom  2.1.6;
 
 include "../../dsc/dsc_rsa_65537_sha256.circom";
 
-component main { public [ merkle_root ] } = DSC_RSA_65537_SHA256(960, 64, 32, 64, 32, 256, 12);
\ No newline at end of file
+component main { public [ merkle_root ] } = DSC_RSA_65537_SHA256(960, 64, 32, 64, 32, 256, 12,1);
\ No newline at end of file
diff --git a/circuits/circuits/tests/dsc/dsc_sha256_rsapss_2048.circom b/circuits/circuits/tests/dsc/dsc_sha256_rsapss_2048.circom
index c7ecb2d3..e7b85cad 100644
--- a/circuits/circuits/tests/dsc/dsc_sha256_rsapss_2048.circom
+++ b/circuits/circuits/tests/dsc/dsc_sha256_rsapss_2048.circom
@@ -2,4 +2,4 @@ pragma circom  2.1.6;
 
 include "../../dsc/dsc_rsapss_65537_sha256.circom";
 
-component main { public [ merkle_root ] } = DSC_RSAPSS_65537_SHA256(960, 64, 32, 64, 32, 2048, 256, 12);
\ No newline at end of file
+component main { public [ merkle_root ] } = DSC_RSAPSS_65537_SHA256(960, 64, 32, 64, 32, 2048, 256, 12,4);
\ No newline at end of file
diff --git a/circuits/tests/dsc/dsc_sha1_rsa_2048.test.ts b/circuits/tests/dsc/dsc_sha1_rsa_2048.test.ts
index ada9dded..f4111057 100644
--- a/circuits/tests/dsc/dsc_sha1_rsa_2048.test.ts
+++ b/circuits/tests/dsc/dsc_sha1_rsa_2048.test.ts
@@ -8,7 +8,7 @@ import {
   mock_dsc_sha1_rsa_2048,
   mock_csca_sha1_rsa_2048,
 } from '../../../common/src/constants/mockCertificates';
-import { k_csca, k_dsc, n_csca, n_dsc } from '../../../common/src/constants/constants';
+import { k_dsc, n_dsc } from '../../../common/src/constants/constants';
 
 describe('DSC chain certificate - SHA1 RSA', function () {
   this.timeout(0); // Disable timeout
@@ -23,8 +23,8 @@ describe('DSC chain certificate - SHA1 RSA', function () {
     cscaCert,
     n_dsc,
     k_dsc,
-    n_csca,
-    k_csca,
+    n_dsc,
+    k_dsc,
     max_cert_bytes,
     true
   );
diff --git a/circuits/tests/dsc/dsc_sha256_rsa_2048.test.ts b/circuits/tests/dsc/dsc_sha256_rsa_2048.test.ts
index cc85ff61..b411a88d 100644
--- a/circuits/tests/dsc/dsc_sha256_rsa_2048.test.ts
+++ b/circuits/tests/dsc/dsc_sha256_rsa_2048.test.ts
@@ -8,7 +8,7 @@ import {
   mock_dsc_sha256_rsa_2048,
   mock_csca_sha256_rsa_2048,
 } from '../../../common/src/constants/mockCertificates';
-import { k_csca, k_dsc, n_csca, n_dsc } from '../../../common/src/constants/constants';
+import { k_dsc, n_dsc } from '../../../common/src/constants/constants';
 
 describe('DSC chain certificate - SHA256 RSA', function () {
   this.timeout(0); // Disable timeout
@@ -23,8 +23,8 @@ describe('DSC chain certificate - SHA256 RSA', function () {
     cscaCert,
     n_dsc,
     k_dsc,
-    n_csca,
-    k_csca,
+    n_dsc,
+    k_dsc,
     max_cert_bytes,
     true
   );
diff --git a/common/src/utils/csca.ts b/common/src/utils/csca.ts
index b9c95604..598a12fd 100644
--- a/common/src/utils/csca.ts
+++ b/common/src/utils/csca.ts
@@ -126,7 +126,9 @@ export function getCSCAInputs(dscSecret: string, dscCertificate: any, cscaCertif
     // console.log('dsc_messagePaddedLen_formatted', dsc_messagePaddedLen_formatted);
 
     // merkle tree saga
-    const leaf = getLeaf(cscaCertificate, n_csca, k_csca);
+    const pemContent = forge.pki.certificateToPem(cscaCertificate);
+    const leaf = getLeaf(pemContent, n_csca, k_csca);
+    console.log('leaf', leaf);
     const [root, proof] = getCSCAModulusProof(leaf, n_csca, k_csca);
     const { signatureAlgorithm: signatureAlgorithmName, hashFunction } = getSignatureAlgorithmDetails(signatureAlgorithm);