Verifiable credential (VC)

Cryptographically sealed credentials are provided to a holder.

• The holder is someone that will be able to make use of it.

• A verifier can check the identity of its issuer.

It may contain identity attributes of more than one entity.

• e.g., marriage agreement

It may contain only attributes of another entity.

• e.g., a dog’s vaccination record.

Issuers can revoke it at any time.

• Some public, shared repository would be required (blockchain).

Verifiable presentation of VCs

Trustworthy validation of a set of provided VCs.

• Authenticity

  • Valid issuer signature, trust in issuer

• Validity

  • In the validity period, not revoked

Selective or ZKP presentation of credentials’ information.

• Show only part of the identity attributes

• Prove the possession of an attribute without disclosing the related identity claim

ZKP: Zero Knowledge Proofs

Method enabling an entity A, to prove and identity of entity B.

• Without disclosing further information regarding Entity B.

That is:

• Entity A will prove that Entity B knows something.

• Without entity B disclosing anything about that knowledge, except its result.

• Also, the world will not gain further information regarding Entity B.