- DID and VC: Untangling Decentralized Identifiers and Verifiable Credentials for the Web of Trust
- DID Specification Registries
- The did:key Method v0.7
- https://www.w3.org/TR/vc-imp-guide/#zero-knowledge-proofs
- ZK proofs allow selective disclosure or full disclosure
- Full disclosure
- Standard VC presentation also reveals the signature
- So a verifier has complete copy of the credential.
- Signature becomes an identifier
- ZK allows full disclosure without revealing reusable elements as identifiers.
- Selective disclosure
- Zero-knowledge methods allow a holder to choose which attributes to reveal and which attributes to withhold on a case-by-case basis without involving the issuer. The credential issuer only needs to provide a single verifiable credential that contains all of the attributes.
- Full disclosure
- Predicate Proofs
- Answer a true-false question.
- Non-ZK would require issuer to issue a custom credential
- ZK allows the holder to generate
- ZK proofs allow selective disclosure or full disclosure
- Classes of proof types: https://w3c-ccg.github.io/security-vocab/#classes
