openid / openid/OpenID4VC-HAIP

cert team query: Use of jwk/kid/x5c in jwt proof type

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Description

As far as I can see, https://openid.github.io/OpenID4VCI/openid-4-verifiable-credential-issuance-1_1-wg-draft.html#appendix-F.1 says that kid, jwk or x5c may be used to pass the key in a jwt proof (though an attestation must be included as well.

HAIP ( https://openid.github.io/OpenID4VC-HAIP/openid4vc-high-assurance-interoperability-profile-wg-draft.html#section-4.5.1 ) doesn't appear to narrow that any further.

Is the correct interpretation that issuers need to accept whichever of kid/jwk/x5c the wallet uses?

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Research direction

Read OpenID4VCI Appendix F.1 and HAIP section 4.5.1, focusing on the allowed jwt proof key forms and the attestation requirement. Compare the two specifications and document or confirm whether issuers must accept kid, jwk, and x5c, including any stated constraints.

Written by the indexing model from the issue text.

Assessment

Domain
authentication, security
Issue type
Documentation
Difficulty
4/5
Estimated time
3-5 days
Activity status
Quiet
Clarity
Mostly clear
Newbie friendliness
45/100

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