2023-03-06 AnonCreds v2.0 Working Group Meeting

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

@Stephen Curran (BC Gov / Cloud Compass Computing Inc.) <swcurran@cloudcompass.ca>

@Steve McCown (Anonyome Labs) <smccown@anonyome.com>

• AnonCreds Specification: https://hyperledger.github.io/anoncreds-spec/

• AnonCreds Methods Registry: https://hyperledger.github.io/anoncreds-methods-registry

• AnonCreds Rust Open Source Code: https://github.com/hyperledger/anoncreds-rs

  • Ledger Agnostic AnonCreds Project Page: https://github.com/orgs/hyperledger/projects/16

• Goals of the Working Group:

  • The goal of AnonCreds v2.0 is to retain and extend the privacy-preserving features of AnonCreds v1.0, while improving capabilities, performance, extensibility, and security

• Welcome and Introductions

• Announcements:

• Updates to the Agenda

• Mike Lodder will lead a discussion on the Data Models he is proposing for AnonCreds v2.0

  • Data Models HackMD document:  https://hackmd.io/ZlsnLoclSveePJOZljgMfA

• Notes from Meeting:

  • Side topic: BARE – another binary data format comparable to CBOR

    • https://datatracker.ietf.org/meeting/114/materials/slides-114-dispatch-binary-application-record-encoding-bare-00

    • https://drewdevault.com/2020/06/21/BARE-message-encoding.html

    • https://datatracker.ietf.org/doc/draft-devault-bare/

  • Data Models introduced:

    • Claim Schema

    • Claim Validators

    • Claim Data

    • Credential Schema

    • Credential Definition

    • Revocation Registry

• Next Week – one of these topics:

  • Collect some examples and continue this discussion:

    • 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?

  • Continue on with Mike's data models to presentation.

• Create a repository for the specification.