Building on DIDs: Presentation Exchange v1.0 Call for Review

Hello W3C DID WG community,

DIDs are the backbone of the decentralized identity ecosystem, and I am so grateful to the DID WG for laying the foundation of DIDs we all build on. With regard to community contributions, the DIF Claims and Credentials Working Group is excited to announce that the Presentation Exchange v1.0<https://identity.foundation/presentation-exchange/spec/v1.0.0/> specification is now a Working Group Draft. We invite you to review the specification in advance of its transition to Working Group Approved status. After this period of review, we will call for implementations as we progress toward a v1.0 Ratification candidate.

Abstract

A common activity between peers in identity systems that feature the ability to generate self-asserted and third-party issued claims is the demand and submission of proofs from a Holder to a Verifier. This flow implicitly requires the Holder and Verifier have a known mechanism to facilitate the two primary steps in a proving exchange: the way Verifiers define the proof requirements, and how Holders must encode submissions of proof to align with those requirements.

To address these needs, the Presentation Exchange specification codifies the Presentation Definition data format Verifiers can use to articulate proof requirements, as well as the Presentation Submission data format Holders can use to submit proofs in accordance with them. The specification is designed to be both claim format and transport envelope agnostic, meaning an implementer can use JSON Web Tokens (JWTs), Verifiable Credentials (VCs), JWT-VCs, or any other claim format, and convey them via Open ID Connect, DIDComm, Credential Handler API, or any other transport envelope.

Comments on the Draft are welcome through 03:59 UTC/GMT on 2021-01-22 (23:59 Boston time on 2021-01-22) and should be provided as issues raised on the specification's GitHub repository<https://github.com/decentralized-identity/presentation-exchange/issues>.

Thank you for every call, event, contribution, and passionate debate that went into every effort around DIDs - only together will we succeed in bringing decentralized identity to the world.

- Daniel