[Openid-dcp] DCP WG EU call agenda

[Jan Vereecken]

Hello,

Please find below the meeting minutes.

## Attendees

Joseph Heenan
Andreea Prian
Andy Lim
Bjorn Hjelm
Hicham Lozi
Lenah Chacha
Martijn
Michael Jones
Patrick Amrein
Tim Cappalli
Jan Vereecken

## IIW

Hybrid meeting taking place, registration is mandatory

One of the topics is: Server to server OpenID4VCI
Current spec is designed for wallets to communicate directly to issuers
People have said there are good reasons to have a wallet backend more involved in the issuance.
Gareth apparently has a document already. Nobody in the meeting had the link.


## OpenID4VCI

https://github.com/openid/OpenID4VCI/pulls

Smaller editorial changes. Reviews appreciated, but planning to merge the following next week regardless (if nobody objects)

Move Encrypted Messages to the top level
https://github.com/openid/OpenID4VCI/pull/642

add implementation considerations for the batch issuance of the credentials
https://github.com/openid/OpenID4VCI/pull/643

Clarification on x5c header in jwt proof type
https://github.com/openid/OpenID4VCI/pull/646

Clarification on x5c header in jwt proof type
https://github.com/openid/OpenID4VCI/pull/648

## HAIP

https://github.com/openid/OpenID4VC-HAIP/pulls

Request to review any of the following PRs 253, 252, 229

https://github.com/openid/OpenID4VC-HAIP/issues

Discussion on couple of issues related to custom URL schemes
https://github.com/openid/OpenID4VC-HAIP/issues/248
https://github.com/openid/OpenID4VC-HAIP/issues/240

The problem currently is that the requirement for mandating haip:// can not always be satisfied.

On iOS it is not possible for multiple apps to register the same customer url scheme (haip://)

DC API for issuance is a potential way forward, but in vanilla OpenID4VP, this would not be possible

Discussion on relaxing the language so that this requirement should be satisfied if the application can respond to it.

Ready for PR

mandate time related requirements?
https://github.com/openid/OpenID4VC-HAIP/issues/242

Usage of dpop_jkt
https://github.com/openid/OpenID4VC-HAIP/issues/104

Added an extra element of session binding when PAR is used.
It is not clear what attack this prevents

FAPI has been through formal analysis and `dpok_jkt` was not raised as being necessary.
Consensus in WG to stay silent about it.

Best regards,
Jan

________________________________
From: Openid-specs-digital-credentials-protocols <openid-specs-digital-credentials-protocols-bounces at lists.openid.net> on behalf of Joseph Heenan via Openid-specs-digital-credentials-protocols <openid-specs-digital-credentials-protocols at lists.openid.net>
Sent: Thursday, 4 September 2025 16:37
To: Digital Credentials Protocols List <openid-specs-digital-credentials-protocols at lists.openid.net>
Cc: Joseph Heenan <joseph at authlete.com>
Subject: [Openid-dcp] DCP WG EU call agenda

Hi all

Proposed agenda for the EU friendly call in ~20 minutes on the usual zoom, https://zoom.us/j/94085567252?pwd=cHNFMExFalhlM2MrOFhoN3J6eDRuZz09


  1.  Code of conduct / Antitrust policy / IPR policy: https://openid.net/wp-content/uploads/2025/06/OIDF_Groups-Activities-Events-Note-Well_Final_2025-06-12.pdf
  2.  Note-taking
  3.  Introductions
  4.  Agenda bashing
  5.  Events
     *   IIW - expect DCP WG hybrid meetings on mornings of Mon 20th & Fri 24th Sept, locations TBC but within usual area.
  6.  General updates
     *   VCI - formal vote on putting draft 17<https://openid.net/specs/openid-4-verifiable-credential-issuance-1_0-17.html> into foundation wide voting process passed on Tuesday; voting is now open until 15th September, please vote: https://openid.net/foundation/members/polls/376
     *   Extended Thursday EU call on 11th Sep to 2 hours to give extra time on HAIP
  7.  OID4VCI 1.0,:
     *   Review open PRs: https://github.com/openid/OpenID4VCI/pulls?q=is%3Aopen+is%3Apr+milestone%3A%22Final+1.0%22
  8.  HAIP PRs
     *   https://github.com/openid/OpenID4VC-HAIP/pulls
  9.  HAIP open issues for 1.0:
     *   https://github.com/openid/OpenID4VC-HAIP/issues?q=is%3Aissue%20state%3Aopen%20-label%3Aafter-wglc%20-label%3Ahas-PR%20-label%3Aready-for-PR%20milestone%3A%221.0%20Final%22


If anyone has any specific topics they’d like to cover please reply to this email or ask at the start of the call.

Thanks

Joseph

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