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Recording of Call:   20230320 AnonCreds V2.0 Working Group Community Meeting.mp4

Segment – Awesome Presentation by Mike Lodder: 20230320 AnonCreds V2.0 Working Group Community Meeting - Presentation Data Models.mp4

Notices: 

This specification creating group operates under the Linux Foundation Community Specification License v1.0.

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• Mike Lodder will continue a discussion of the Data Models he is proposing for AnonCreds v2.0, this time talking about Presentations
  • Data Models HackMD document:  https://hackmd.io/ZlsnLoclSveePJOZljgMfA
  • Notes from Meeting:
    • Contents of the Issued Credential – easily mapped into other formats, such as the W3C VC Data Model.
      • Open question on where encoding occurs – within AnonCreds (better interoperability, less data to store, more computation) or by the Issuer.
    • PresentationSchema
      • A possibly published data structure used by the Verifier to ask for data from the Holder.
      • Atomic – when requested, a Proof based on a PresentationSchema is either proven or not.
      • Can use something like DIF Presentation exchange to AND/OR a set of PresentationSchemas in to a Presentation Request – plus adding an ID and a nonce.
      • Different types of proofs were covered – from plain signatures to range-proofs.
      • Different crypto can be used.
    • From Chat:
      • Is bulletproof more efficient than schnorr proofs?
        • Different purposes – Schnorr: Prove you know the hidden value, Bullet: Proof hidden value is in range.
      • Discussion of revocation scalability – details to be covered in a future meeting.
• Plans for IIW?
• Next Meeting (two weeks):
  • Suspension vs./as well as revocation?
  • Collect some use case specific examples and continue the discussions:
    • Applying the data structures to a real use case or two
      • Take an existing AnonCreds Schema (maybe this) and Credential Definition (maybe this) and define what it would be using Mike's proposed data models.
        • Where would the data models exist, such as on ledger, in the AnonCreds specification?
    • What concrete uses other than link-secret is there for blinded data in a credential?
  • ALLOSAUR Revocation

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