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2025 Q2 Hyperledger AnonCreds

Created by Stephen Curran with input from the Hyperledger AnonCreds Maintainers.

Implementation Repositories

Specifications

Web and Wiki Pages

Project Health

This quarter saw several excellent LFDT Webinars and a Case Study highlighting deployments of the AnonCreds project by large enterprise organizations, including Oracle Labs, DSR/Hedera and InfoSys. These webinars are part of the LFDT and the broader AnonCreds community to raise awareness of the ease of deployment, privacy and power of AnonCreds-based digital trust services. The resources included:

On the technical front, work has begun on greatly expanding the size of the AnonCreds v1 Revocation Registry size from around 3k entries per registry to 500k or more entries per registry. The change does not impact the cryptography of the approach, but rather changes how the revocation data is managed, furthering the change from publishing credential revocation statuses as deltas (lists of identifiers for revoked credentials) to publishing the entire state of the registry as a bit array. This work is still in the planning/technical spike phase, so is not reflected in the Activity Dashboard below.

The AnonCreds Quarterly Activity Dashboard has been updated to include the existing repos as well as the new hyperledger-anoncreds organization. The dashboard shows the activity in the past quarter, which is lower than previous quarters, but still healthy.

Questions/Issues for the TAC

None.

Releases

Overall Activity in the Past Quarter

Since the last Quarterly Report, the key efforts are hightlighted in the Project Health section above. The AnonCreds project has been stable, with no new releases in the past quarter, and no major issues or changes to the codebase. The focus has been on community engagement and experimenting with large revocation registries for AnonCreds v1.

Current Plans

Contributing to the conversation happening in the broader community about new ways to use ZKPs for achieving unlinkable VCs, and determining how to leverage that work into expanding efforts on AnonCreds, or using the resources of AnonCreds together with those efforts. The new longfellow-zk project and BBS Signatures are the key projects on the horizon.

Moving ahead with the work on the AnonCreds v1 Revocation Registry size expansion, with a focus on the data management, performance and ease of deployment aspects of the change.

Update the GitHub organization from "hyperledger" to "hyperledger-anoncreds". Evaluation is needed to determine the CI/CD impacts of that change.

Maintainer Diversity

After the recent cleanup of inactive Hyperledger Maintainers, the AnonCreds project now has nine maintainers from seven different organizations.

Contributor Diversity

There were few contributions in the past quarter because of the stability of the codebase. Conversations amongst the usual contributors continues.

Additional Information