[Openid-specs-ab] DCP/SIOP Call Notes 28-Sep-23

[Michael Jones]

DCP/SIOP Call Notes 28-Sep-23

Kristina Yasuda
Mike Jones
Brian Campbell
Pedro Felix
Yaron Zehavi
Paul Templeman
Giuseppe De Marco
Sven Stucki
David Chadwick
Jacob Ideskog
Mark Dobrinic
Judith Kahrer
Dimitri Tsiflitzis
David Waite (DW)
Andres Uribe
Bjorn Hjelm
Vikas Singla
Idakto StéphaneCauchie

Introductions
              Dimitri Tsiflitzis - In Thessaloniki, Greece
              Sven Stucki - In Switzerland
              Paul Templeman - in Australia
              Yaron Zehavi - In Vienna

We talked about the DCP meeting to occur the Monday morning before IIW
              https://www.eventbrite.com/e/oidf-digital-credentials-protocol-working-group-meeting-at-cisco-tickets-708486982637?aff=oddtdtcreator
              Register by Monday, October 2
              There's an Open Wallet Foundation (OWF) meeting at the same time
              We are exploring having a joint session

There's a new library supporting OpenID4VP
              https://github.com/TalaoDAO/AltMe

The VP over BLE spec is now in GitHub
              https://github.com/openid/openid4vp_ble

Pull Requests
           https://github.com/openid/OpenID4VCI/pull/65 - add identifiers for issuing credential of the same type, different content
                           People are asking for identifiers to be described better
                           Judith asked for a separate issue to be opened
                           Pedro supported using identifiers
                           Kristina asked how wallets would receive the identifiers
                                         We are trying to avoid breaking changes
                           Kristina asked about adding an option to pass an identifier in the credential offer
                                         Pedro talked about complexities that this would introduce
                                         Jacob said that including an identifier would make it instance specific
                                         Jacob said that identifiers are a solution to a different problem
                                         It is a subtyping problem
                           Earlier we'd considered the DIF Credential Manifest spec but it was more complicated than our current solution
                           Pedro said that if there's an entry in the metadata, it needs to be in a standard place
                           Kristina said that the credential offer is untrusted
           https://github.com/openid/OpenID4VCI/pull/64 - clarify credential error response can be authorization or credential request error
                           Kristina asked for additional reviewers
                           Pedro volunteered
           https://github.com/openid/OpenID4VCI/pull/66 - add data integrity verifiable presentation as proof of possession
                           Additional reviews needed
           https://github.com/openid/OpenID4VCI/pull/70 - Wallet notifying the Issuer of acceptance/rejection of issued credential
                           Kristina asked about how to identify the desired credential
                                         We could use identifiers
                                         We could use a state parameter
                           Brian said that it's a weird mismatch to only be able to communicate state of a group of credentials
                                         He questions whether this functionality is actually needed
                           Brian suggested just sending the credential rather than an identifier
                           Kristina said that if we add identifiers, we may want to make them mandatory

Next Call
              The next DCP/SIOP call will be Thursday, October 5 at 8am Pacific Time

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