Hyperledger AnonCreds Archives – Hyperledger Foundation

Apr 11

Why Hyperledger Foundation Sponsors, Attends and Works at Internet Identity Workshop

By Sean Bohan, Community Architect Blog, Hyperledger AnonCreds, Hyperledger Aries, Hyperledger Indy, Hyperledger Ursa, Identity

Since the launch of Hyperledger Indy, a DLT purpose-built for decentralized identity, in 2017, Hyperledger Foundation has been a proud sponsor, attendee and contributor to the Internet Identity Workshop (IIW) community. We continue that commitment in 2023 and welcome new and existing Hyperledger community members to join us at IIW. Not only is it a good event with great people, but it is an event/space/community where the work is getting done.

“IIW is not the place where CEOs gather to spread their feathers and show off. That’s one reason it’s the most leveraged conference in the world. Actual work happens at IIW, and all of that work is toward starting and moving projects forward. It’s where fully constructive people and organizations such as Hyperledger Foundation come to roll up sleeves and get together with participants old and new, to make new connections and leave knowing more, doing more and working faster on stuff that matters.” — Kaliya Hamlin, Doc Searls and Phil Windley, IIW Organizers

Identity, privacy, anonymity and agency have been intrinsic concepts for the blockchain and decentralized technology ecosystem since the beginning. Even before Satoshi’s whitepaper was released, the Internet Identity Workshop (IIW) was a twice-yearly “gathering of the clans” for the identity space. It has a long tradition of being where connections are made, projects are presented, code is shared, (vigorous) debate occurs, and people of varied and diverse skill sets who are passionate about these topics work to bring these solutions to life.

“Hyperledger Foundation’s presence at IIW means that the projects that we believe are central to advancing decentralized identity — Hyperledger AnonCreds, Hyperledger Aries, and Hyperledger Indy — have the presence they need to receive the attention they deserve from the community. As Indicio relies on these Hyperledger projects we, as a longstanding attendee of IIW, are grateful for Hyperledger’s presence and support.” — Sam Curren, Senior Architect and Deputy CTO, Indicio

Hyperledger Foundation is a sponsor of IIW because it is a rallying point for the decentralized identity community, including those contributing to Hyperledger and other LF Identity projects as well as standards and technologies such as W3C Verifiable Credentials and DIF. We look forward to attending for a number of reasons, including:

Potential users of and prospective contributors to Hyperledger projects are at IIW, and we want to meet them.
Stephen Curran and Timo Glastra, new members of the Hyperledger Technical Oversight Committee, will be there talking about Hyperledger technologies and community.
Contributors and maintainers working on Hyperledger identity projects like Hyperledger Indy, Aries, Ursa and now Anoncreds are there to gather, share, hear feedback and work. This list includes Char Howland, Sam Curren, Berend Sliedrecht, and many others.
For the Linux Foundation, IIW is an open forum where other LF Digital Trust initiatives like Open Wallet Foundation, Decentralized Identity Foundation and Trust Over IP can cross-pollinate ideas, get direct feedback from the community, find consensus on direction and build relationships.
IIW is where members of the ecosystem gets to roll up their sleeves. One great example of this is the DIDComm Connect-a-thon.
The most engaged and vocal thinkers and doers in the identity space are at IIW, and it is a critical opportunity for the team to collaborate with them in person, gather their insights and work that feedback back into our community.

Hyperledger Foundation’s sponsorship of IIW takes different forms for every event, but we as a team feel supporting this community is critical to the identity ecosystem in general and Hyperledger identity projects. We are thrilled to fund the incredible work that goes into putting on each IIW, the community that emerges and the work that results.

Please join us April 18, 19 and 20 for IIW #36. Hyperledger community members save 20% using this link.

If you want to find out more about Hyperledger identity initiatives, please check out

Nov 15

Love0

Announcing Hyperledger AnonCreds: Open Source, Open Specification Privacy Preserving Verifiable Credentials

By Stephen Curran, Maintainer, Hyperledger AnonCreds Blog, Hyperledger AnonCreds, Identity

AnonCreds, the most commonly used Verifiable Credential (VC) format in the world*, is now a Hyperledger project. Ledger agnostic and with a formal open specification, AnonCreds continues to evolve as a mature verifiable credential format with unique privacy-protecting capabilities. As a Hyperledger project, AnonCreds will have support to grow its code base and community on a global level with technical governance that fosters best open development and security practices.

As the Internet transitions to allowing people, organizations, and things to have greater control over the sharing of their credentials, protecting privacy is of paramount concern.

Hyperledger AnonCreds—short for “Anonymous Credentials”—is a type of VC that adds important privacy-protecting ZKP (zero-knowledge proof) capabilities to the core VC assurances. A core element of the Hyperledger Indy project for more than five years, AnonCreds is a mature, complete model and interactions set, with extensive support across Hyperledger Aries frameworks.

The creation of this project signifies the continued healthy evolution of an open source software project that was once monolithic and is now a set of well-defined independent components.

Hyperledger AnonCreds is ledger-agnostic and client-agnostic. It is not tied to Hyperledger Indy or Aries. This makes it usable with other verifiable data registries/ledgers and verifiable credential client stacks. As a result, important privacy-protecting capabilities become available to a much broader audience, and the underlying cryptography can evolve without affecting the features above it.

Additional benefits of using Hyperledger AnonCreds include:

Avoidance of identifiers: No correlatable identifiers are required in presenting data to a verifier. Correlatable identifiers may be applied in a use case specific manner.
Verifier assurances: Credentials are bound to the holder, so verifiers know that credentials presented together were all issued to the holder providing the presentation.
Minimal data sharing: Data to be shared by a holder to a verifier is minimized through the use of selective disclosure and ZKP predicates

Flexible formatting: Credentials and presentations can be formatted in the W3C VC Data Model standard format.

AnonCreds has joined the Hyperledger ecosystem with over 25 sponsors. The project consists of:

The AnonCreds Specification, managed by the Hyperledger AnonCreds Specification Working Group and with the potential of being submitted to an appropriate Standards organization
Ledger/Verifiable Data Registry-agnostic, open source code implementations of the AnonCreds specification, suitable for use with Hyperledger Aries and non-Aries agents
Guidance for creating ledger-specific AnonCreds Methods to write and resolve AnonCreds objects for specific ledgers
Documentation on AnonCreds suitable for all audiences, from business audiences to cryptographers
A test suite to verify adherence to the AnonCreds specification and the interoperability of AnonCreds implementations.

Next steps include evolving the existing AnonCreds Rust implementation to be friendlier to VDRs/ledgers other than Indy, wrapping up the v1.0 specification, and gaining compliance with the W3C Verifiable Credentials Data Model Standard.

If you’re interested in learning more about AnonCreds start with the Hyperledger AnonCreds project page. From there you can find how to join project discussions on Discord, add yourself to the project mailing list, find the AnonCreds repositories on GitHub, and join the AnonCreds Working Groups.

We welcome interest from all groups and organizations, including enterprises and standards organizations. We look forward to hearing from you!

*Source: godiddy.com combined “sov” (Indy) network volume