Privacy-preserving authentication

This lecture covers privacy-preserving authentication schemes, focusing on credential issuance, cryptographic signatures, and revocation mechanisms. It discusses attribute sets determined by users and issuers, PS credentials, key generation, signature verification, and constructing tokens for proving possession of credentials. The instructor explains the importance of proving possession of a credential, revoking/blocking credentials, and different credential schemes like U-Prove and Identity Mixer. Recent developments in anonymous credentials and mitigation mechanisms for revocation are also explored, including n-times anonymous credentials and issuer-driven revocation. The lecture concludes with a summary of various mitigation mechanisms for ensuring privacy in authentication systems.