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<p class="MsoNormal">SIOP Special Topic Call Notes 9-Mar-23<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Mike Jones<o:p></o:p></p>
<p class="MsoNormal">David Chadwick<o:p></o:p></p>
<p class="MsoNormal">Takahiko Kawasaki<o:p></o:p></p>
<p class="MsoNormal">Joseph Heenan<o:p></o:p></p>
<p class="MsoNormal">Bjorn Hjelm<o:p></o:p></p>
<p class="MsoNormal">Giuseppe De Marco<o:p></o:p></p>
<p class="MsoNormal">Judith Kahrer<o:p></o:p></p>
<p class="MsoNormal">Kristina Yasuda<o:p></o:p></p>
<p class="MsoNormal">Torsten Lodderstedt<o:p></o:p></p>
<p class="MsoNormal">Elizabeth Garber<o:p></o:p></p>
<p class="MsoNormal">David Waite<o:p></o:p></p>
<p class="MsoNormal">Oliver Terbu<o:p></o:p></p>
<p class="MsoNormal">Christian Frees<o:p></o:p></p>
<p class="MsoNormal">Sebastian Schmittner<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Introductions<o:p></o:p></p>
<p class="MsoNormal"> Christian Frees and Sebastian Schmittner from the European EPC Competence Center GmbH (EECC) introduced themselves<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Hackathon<o:p></o:p></p>
<p class="MsoNormal"> Torsten reported that ~20 developers participated in a hackathon last week implementing OpenID4VC<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">OpenID4VP<o:p></o:p></p>
<p class="MsoNormal"> Kristina recapped ISO's desire to ballot their Mobile Driver's license spec<o:p></o:p></p>
<p class="MsoNormal"> It must point to a stable spec<o:p></o:p></p>
<p class="MsoNormal"> Therefore, we need a second Implementer's Draft<o:p></o:p></p>
<p class="MsoNormal"> During the Connect call prior, we merged PR #427 OID4VP: client id format<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Pull Requests<o:p></o:p></p>
<p class="MsoNormal"> <a href="https://bitbucket.org/openid/connect/pull-requests/478">
https://bitbucket.org/openid/connect/pull-requests/478</a> Fixed JARM JWE only encryption language<o:p></o:p></p>
<p class="MsoNormal"> Oliver updated a syntax error in the PR<o:p></o:p></p>
<p class="MsoNormal"> Merged<o:p></o:p></p>
<p class="MsoNormal"> <a href="https://bitbucket.org/openid/connect/pull-requests/474">
https://bitbucket.org/openid/connect/pull-requests/474</a> Extended direct_post to support redirect back to the verifier<o:p></o:p></p>
<p class="MsoNormal"> Torsten talked about the possibility of overflowing URL size restrictions<o:p></o:p></p>
<p class="MsoNormal"> Joseph was concerned about whether this would work on iOS<o:p></o:p></p>
<p class="MsoNormal"> Torsen showed us a flow diagram that the PR adds<o:p></o:p></p>
<p class="MsoNormal"> David Chadwick and Torsten discussed a possible security consideration that could be described<o:p></o:p></p>
<p class="MsoNormal"> Merged<o:p></o:p></p>
<p class="MsoNormal"> Some editorial improvements may still be needed<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Issues<o:p></o:p></p>
<p class="MsoNormal"> <a href="https://bitbucket.org/openid/connect/issues?status=new&status=open&component=SIOP&component=Verifiable%20Presentation&component=Credential%20Issuance">
https://bitbucket.org/openid/connect/issues?status=new&status=open&component=SIOP&component=Verifiable%20Presentation&component=Credential%20Issuance</a><o:p></o:p></p>
<p class="MsoNormal"> <a href="https://bitbucket.org/openid/connect/issues/1551">
https://bitbucket.org/openid/connect/issues/1551</a> Administrative Trust in the RP<o:p></o:p></p>
<p class="MsoNormal"> David Chadwick requested to keep this open<o:p></o:p></p>
<p class="MsoNormal"> <a href="https://bitbucket.org/openid/connect/issues/1768">
https://bitbucket.org/openid/connect/issues/1768</a> simplify VP Token encoding when only one VP is returned?<o:p></o:p></p>
<p class="MsoNormal"> Torsten noted that we want more feedback from implementers before doing this<o:p></o:p></p>
<p class="MsoNormal"> Joseph dislikes polymorphic parameters because they can cause testing issues<o:p></o:p></p>
<p class="MsoNormal"> Kristina suggested adding text saying that single values must not be returned as an array<o:p></o:p></p>
<p class="MsoNormal"> Torsten thinks returning multiple VPs may be an infrequent corner case<o:p></o:p></p>
<p class="MsoNormal"> We agreed for Kristina to create a PR to add this clarification and then merge it after editors' review<o:p></o:p></p>
<p class="MsoNormal"> <a href="https://bitbucket.org/openid/connect/issues/1537">
https://bitbucket.org/openid/connect/issues/1537</a> Presenting VC without a VP using OpenID4VP<o:p></o:p></p>
<p class="MsoNormal"> Torsten will add a comment about security considerations<o:p></o:p></p>
<p class="MsoNormal"> <a href="https://bitbucket.org/openid/connect/issues/1863">
https://bitbucket.org/openid/connect/issues/1863</a> JARM JWE-only language is not consistent with JARM<o:p></o:p></p>
<p class="MsoNormal"> This is addressed by PR #478<o:p></o:p></p>
<p class="MsoNormal"> Oliver is closing<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">New Implementer's Drafts for OpenID4VCI and SIOPv2<o:p></o:p></p>
<p class="MsoNormal"> Mike asked when we want to create Implementer's Drafts for the other OpenID4VC specs<o:p></o:p></p>
<p class="MsoNormal"> Kristina said as soon as we merge the major PRs<o:p></o:p></p>
<p class="MsoNormal"> We discussed adding client_id_scheme to the other specs<o:p></o:p></p>
<p class="MsoNormal"> We agreed to do so by reference to OpenID4VP for now<o:p></o:p></p>
<p class="MsoNormal"> We might eventually break this out into its own spec<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"> <a href="https://bitbucket.org/openid/connect/pull-requests/384">
https://bitbucket.org/openid/connect/pull-requests/384</a> Add a cwt proof type<o:p></o:p></p>
<p class="MsoNormal"> Oliver asked for clarifications on how to represent COSE_Key values<o:p></o:p></p>
<p class="MsoNormal"> We discussed changing "Claim Key" to "Label"<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Next Call<o:p></o:p></p>
<p class="MsoNormal"> The next call will be Monday, March 13th at 3pm Pacific Time<o:p></o:p></p>
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