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<p class="MsoNormal">SIOP Special Topic Call Notes 6-Apr-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">Andrew Hughes<o:p></o:p></p>
<p class="MsoNormal">Brian Campbell<o:p></o:p></p>
<p class="MsoNormal">David Chadwick<o:p></o:p></p>
<p class="MsoNormal">Kristina Yasuda<o:p></o:p></p>
<p class="MsoNormal">Victor Lu<o:p></o:p></p>
<p class="MsoNormal">Torsten Lodderstedt<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"><o:p> </o:p></p>
<p class="MsoNormal">Introductions<o:p></o:p></p>
<p class="MsoNormal"> Victor Lu introduced himself as an independent participant<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Blocking Custom URI Schemes<o:p></o:p></p>
<p class="MsoNormal"> Andrew made us aware that Google announced that they intend to block some custom URI schemes<o:p></o:p></p>
<p class="MsoNormal"><a href="https://groups.google.com/a/chromium.org/g/blink-dev/c/wcCrcMTELS0/m/BCEpx-JsCAAJ?pli=1">https://groups.google.com/a/chromium.org/g/blink-dev/c/wcCrcMTELS0/m/BCEpx-JsCAAJ?pli=1</a><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"> We published <a href="https://openid.net/specs/openid-4-verifiable-presentations-1_0-17.html">
https://openid.net/specs/openid-4-verifiable-presentations-1_0-17.html</a> on Monday, April 3rd<o:p></o:p></p>
<p class="MsoNormal"> This was announced at <a href="https://openid.net/2023/03/09/public-review-period-for-proposed-second-implementers-draft-of-openid-for-verifiable-presentations-specification/">
https://openid.net/2023/03/09/public-review-period-for-proposed-second-implementers-draft-of-openid-for-verifiable-presentations-specification/</a><o:p></o:p></p>
<p class="MsoNormal"> ID Union folks expect to have review comments<o:p></o:p></p>
<p class="MsoNormal"> ID Union is a government-funded identity project in Germany<o:p></o:p></p>
<p class="MsoNormal"> We could still make strictly editorial changes until Sunday, April 16th, if warranted<o:p></o:p></p>
<p class="MsoNormal"> Mike stated that we should make no changes at all once early voting starts on Monday, April 17th<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/">
https://bitbucket.org/openid/connect/pull-requests/</a><o:p></o:p></p>
<p class="MsoNormal"> David Chadwick asked if we could add two PRs to the VP spec<o:p></o:p></p>
<p class="MsoNormal"> PR #455: OID4VP add train client id scheme<o:p></o:p></p>
<p class="MsoNormal"> PR #485: Add x509 client id scheme value<o:p></o:p></p>
<p class="MsoNormal"> Kristina and Torsten reminded us that the working group previously decided that these will be considered after the Implementer's Draft is published<o:p></o:p></p>
<p class="MsoNormal"> PR #472: Fixes Deferred Credential Endpoint<o:p></o:p></p>
<p class="MsoNormal"> Kristina reviewed this and requested changes<o:p></o:p></p>
<p class="MsoNormal"> Other reviews are requested<o:p></o:p></p>
<p class="MsoNormal"> David Chadwick reminded us that the VCWG is considering a feature with overlapping functionality<o:p></o:p></p>
<p class="MsoNormal"> <a href="https://github.com/w3c/vc-data-model/pull/1035">
https://github.com/w3c/vc-data-model/pull/1035</a><o:p></o:p></p>
<p class="MsoNormal"> We should consider whether to align on syntax<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"> #1882: OpenID4VCI: order in credential formats<o:p></o:p></p>
<p class="MsoNormal"> Kristina will add a comment about the purpose of the display names<o:p></o:p></p>
<p class="MsoNormal"> #1836: iat and/or exp in proof parameter<o:p></o:p></p>
<p class="MsoNormal"> Mike and Brian agreed with the suggestion<o:p></o:p></p>
<p class="MsoNormal"> Brian said that servers can encode their own conception of time in the nonce<o:p></o:p></p>
<p class="MsoNormal"> #1759: No need for credential endpoint when we have the batch credential endpoint<o:p></o:p></p>
<p class="MsoNormal"> Mike agrees that requiring the credential endpoint is appropriate, since it’s the normal simple case,<o:p></o:p></p>
<p class="MsoNormal"> whereas having an optional batch credential endpoint is also appropriate<o:p></o:p></p>
<p class="MsoNormal"> Torsten said that we need more implementation experience and then we should decide based on implementation feedback<o:p></o:p></p>
<p class="MsoNormal"> #1451: [ID-2] Mandatory vs optional credential claims<o:p></o:p></p>
<p class="MsoNormal"> David Chadwick believes this issue is obsolete since the wallet can say what it wants to<o:p></o:p></p>
<p class="MsoNormal"> Kristina resolved the issue on that basis<o:p></o:p></p>
<p class="MsoNormal"> #1639: Enable automatic update of Verifiable Credentials<o:p></o:p></p>
<p class="MsoNormal"> Torsten said that this requests a push model - which is more complicated than what we have<o:p></o:p></p>
<p class="MsoNormal"> We will file a PR giving implementation considerations on how to refresh Verifiable Credentials<o:p></o:p></p>
<p class="MsoNormal"> Torsten said we should a description of sender-constraining access and refresh tokens<o:p></o:p></p>
<p class="MsoNormal"> We should be able to use VCI with DPoP<o:p></o:p></p>
<p class="MsoNormal"> #1808 is about using DPoP<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, April 10th at 4pm Pacific Time<o:p></o:p></p>
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