Time: 7:00 Pacific / 16:00 Central Europe
Call Link:



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


Hyperledger is committed to creating a safe and welcoming

community for all. For more information

please visit the Hyperledger Code of Conduct.

Meeting Attendees

  • Stephen Curran (BC Gov / Cloud Compass Computing Inc.) <>

Related Specifications and Repositories:

Meeting Preliminaries:


  • Specification for Privacy Preserving, Scalable Revocation – – Mike Lodder
    • How is binding done to between the credential and the revocation?
    • How are keys managed when there are multiple revocation managers (multi-party computation configuration)?
  • VC-DI-BBS Specification and AnonCreds V2 – getting to collaboration?
    • BBS Signatures specification is moving through IETF –
      • Incubation happening at DIF
    • DHS has announced support for using BBS Signatures for selective disclosure and unlinkability
      • Intended approach is to use Parallel Signatures, and to sign VCs with a NIST approved signature and BBS Signatures
    • W3C Working Group has a release candidate spec – vc-di-bbs
      • Selective disclosure, unlinkability, holder binding, pseudonyms (issuer and holder defined) (directed identifiers)
      • Left off – revocation (!!), blinded secret, claim equality, set membership, range proof, signed integer
      • RDF Canonicalization is used – JSON-LD-based, and same as other VC-DI cryprosuites
  • Getting BBS Support into AnonCreds v2
  • Reminder of new meeting times
    • Second Monday of each month – 7:00 Pacific / 16:00 Central Europe
    • Fourth Monday of each month – 15:00 Pacific / 16:00 Mountain / Super Late Central Europe (Midnight...) / 10:00 Auckland
  • Open Discussion
    • Using an accumulator as a space-efficient way to enable set membership of hashes? For example:
      • Up to a million high-entropy hashes
      • Only needed query: "is hash XYZ in the set (Y/N)?" – e.g., given hash XYZ and the accumulator, can I answer that question?

To Dos:

Action items