2024-08-12 AnonCreds Working Group Meeting
Summary
Further Update: Proposed scheme for unlinkability with ZKPs using hardware based holder key
Project status updates – Revocation Manager for ALLOSAUR, BBS, auditing
AnonCreds Project Charter
Merging BBS Efforts
Open Discussion
Time: 7:00 Pacific / 16:00 Central Europe
Call Link: https://zoom.us/j/97954159540?pwd=WWk3WmQ3MVh1SXBYZGVreGl0QllGdz09
Recording:
Notices:
This specification creating group operates under the Linux Foundation Community Specification License v1.0.
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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
Proposal from Dfinity / Google / Jan Camenisch for using ZKPs with Hardware Keys
Follows:
Feedback from Cryptographers on the European ARF
ECDSA proposal – early days. Start of an academic paper. – . The work is based on Ligaro (Ames, Ishai, Hazay, Venkitasubramaniam).
Must go through all the rigour, and then through standardization.
Digital Bazaar objects because it lacks a pseudonymous identifier for the credential – same complaint it had about AnonCreds back in the day.
Push for BBS to be reviewed by Cryptographers.
Status updates from current work:
Revocation Manager for ALLOSAUR Project – Hyperledger Mentorship project being executed by @VictorH2208Project plan
BBS Signatures
Audit Updates from Mike Lodder:
blsful - audit complete and published in Agora
Audit complete: Genaro to be contributed
Audit Complete: verifiable-secret-sharing – some changes, and some ripple affects, such as to Genaro.
AnonCreds Project Charter:
Stems from the recent "intent to form" announcement from the Linux Foundation and Hyperledger Foundation about LF Decentralized Trust.
Proposed Charter: https://docs.google.com/document/d/1UiUv2H_xOHxV_rXfTSlsPu2TdQjgxNlVhU67RtqbMlM/edit?usp=sharing
Plan:
Create an "anoncreds" repo, similar to this Aries repo.
Put into it a "TSC.md" file that lists the TSC members and processes – same as this TSC.md in Aries.
Put into it a "MAINTAINERS.md" that points to the Hyperledger "access-control.yaml" file and processes of Maintainers – same as this MAINTAINERS.md in Aries.
Put a "MAINTAINERS.md" (like this one) file in all repos that points to the "access-control.yaml" file and to the AnonCreds repo MAINTAINERS.md ^^^^^^
Update the charter to match roughly what is in the Aries Charter
PQ Efforts for Revocation
PQ equivalent to ALLOSAUR – fast, scalable, unlimited.
Research – very fast set membership for both lattice and elliptic curves (need not be pairing friendly).
Tweak to bullet proofs.
As high as: 2^38 memberships – pre-allocated – but can be a smaller set.
Less than 1 sec. to make proof, less than 1 sec. to verify.
Open Discussion
To Dos:
Action items