2025-06-23 AnonCreds Working Group Meeting

Summary

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

Call Link: https://zoom.us/j/94264308304?pwd=uhn8kba2MiIizcVijwfs0K8UoEibqb.1

Recording: https://zoom.us/rec/share/c0YCe80zR0wGmCAtATVNFEgwKIf3UKq2hRvRwH1k0Zs18QDvAQxN7wH5m4FuSTEZ.IOQWeqRjNCl5Y9Au

Notices: 

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

Meeting Attendees

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

Related Specifications and Repositories:

• AnonCreds v1.0:

  • The v1.0 specification is published here: https://hyperledger.github.io/anoncreds-spec/

  • The Working Group uses this GitHub repository to manage the specification: https://github.com/hyperledger/anoncreds-spec

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

  • The v1.0 implementation in Rust is here: https://github.com/hyperledger/anoncreds-rs

  • The v1.0 implementation is dependent on this Rust CL Signatures implementation: https://github.com/hyperledger/anoncreds-clsignatures-rs

• AnonCreds v2.0

  • The initial framework for the v2.0 specification repository is here: https://github.com/hyperledger/anoncreds-spec-v2

  • The v2.0 implementation in Rust is here: https://github.com/hyperledger/anoncreds-v2-rs

  • Underlying AnonCreds v2.0 are cryptographic libraries in Hyperledger Labs Agora

Meeting Preliminaries:

• Welcome and Introductions

• Announcements:

• Any updates to the Agenda?

Agenda

• Update from the work going on at Oracle Labs – abstraction layer for privacy and accountability across ZKP implementations

  • Designing the layer, implementing it across two libraries – Dock Networks and AnonCreds v2.

  • Presented at IIW – slides available

  • New work – implementing AnonCreds v1 under the abstraction layer

  • Can now go through the process – without revocation.

  • Nearing a PR to the anoncreds-rs library (AnonCreds v1), but enables the same interface as used with the other implementations.

    • Once enabled, an agent using the abstraction could switch to other libraries.

  • Oracle Labs met with Mike Lodder in Utah. As well, met with Richard Esplin (Dock Networks) and Brent Zundel.

• AnonCreds v1 Revocation “Phone Home” Issue and How to Fix It

  • Earlier presentation – AnonCreds v1 Revocation Improvements – Dealing with the “Phone Home” problem and more

    • Combining revocation state data from many RevRegs into a single file.

    • Using compressed G2 points double the capacity of the same-sized tails file

    • Using the same tails file for all RevRegs associated with a Cred Def.

  • Reducing AnonCreds Metadata Document about the progress made.

  • Presentation about the progress

  • Discussion

• Changing the AnonCreds github organization

• Open Discussion

To Dos:

Action items