openid / openid/OpenID4VP

Presentation of non-mdoc credentials (e.g. sd-jwt vc) offline

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Description

We had a good discussion at IIW #39 about ways to enable offline presentation of non-mdoc credentials.
Options discussed:

  • Extension of ISO 18013-5
  • Pursue OID4VP over BLE
  • Use CTAP/HYBRID as transport for OID4VP requests and responses.
    The consensus in the session was the CTAP/HYBRID seems to be the most attractive approach as it leveraged CTAP/HYBRID (implementations and community and roadmap) and also leverages OID4VP feature for offline (e.g. transaction data).

Note: CTAP/HYBRID sends the data over the internet (via a relay server). Plan is to extend it with BLE and UWB. That would enable real offline presentation.

What we actually need is an appendix in OID4VP describing how CTAP could be used to pass OID4VP requests and receive respective responses. It should then work with all transports (even UWB going forward).

Contributor guide

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

The issue names no repository files or tests; start by reviewing the OID4VP specification and the CTAP/HYBRID, BLE, and UWB approaches listed in the discussion. The requested outcome is an OID4VP appendix defining how CTAP carries requests and responses across the proposed transports.

Written by the indexing model from the issue text.

Assessment

Domain
authentication, networking, security
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
25/100

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