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Sorry but I think wrt c_nonce, the following summary might be more accurate (as found here
<a href="https://github.com/openid/OpenID4VCI/issues/331#issuecomment-2161515537" id="LPlnk">
https://github.com/openid/OpenID4VCI/issues/331#issuecomment-2161515537</a>):</div>
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<a target="_blank" id="LPUrlAnchor258655" href="https://github.com/openid/OpenID4VCI/issues/331#issuecomment-2161515537" style="text-decoration: none; color: var(--themePrimary);">Is c_nonce required in proof or not? · Issue #331 · openid/OpenID4VCI</a></div>
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Nonces in proof types are OPTIONAL but the following sentence confused me: The proof element MUST incorporate the Credential Issuer Identifier (audience), and a c_nonce value generated by the Autho...</div>
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github.com</div>
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<span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">no c_nonce from the token endpoint.</span></li><li style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0); margin-top: 0.25em; margin-left: 0px;">
<span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">c_nonce from the credential endpoint is optional. returned in the credential error response if needed.</span></li><li style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0); margin-top: 0.25em; margin-left: 0px;">
<span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">is attack in
</span><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0); font-weight: var(--base-text-weight-semibold, 600);"><u><a href="https://github.com/openid/OpenID4VCI/issues/19" id="OWA01fa3a88-868f-8557-8373-ae17a4275858" class="issue-link js-issue-link OWAAutoLink" data-error-text="Failed to load title" data-id="1877183628" data-permission-text="Title is private" data-url="https://github.com/openid/OpenID4VCI/issues/19" data-hovercard-type="issue" data-hovercard-url="/openid/OpenID4VCI/issues/19/hovercard" style="color: rgb(0, 0, 0);">VC
Issuance is vulnerable to Unknown Key Share attacks</a></u></span><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0); font-weight: var(--base-text-weight-normal, 400);"><u><a href="https://github.com/openid/OpenID4VCI/issues/19" id="OWA01fa3a88-868f-8557-8373-ae17a4275858" class="issue-link js-issue-link OWAAutoLink" data-error-text="Failed to load title" data-id="1877183628" data-permission-text="Title is private" data-url="https://github.com/openid/OpenID4VCI/issues/19" data-hovercard-type="issue" data-hovercard-url="/openid/OpenID4VCI/issues/19/hovercard" style="color: rgb(0, 0, 0);"> #19</a></u></span><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"> worth
protecting against? if yes, </span><span style="font-family: var(--fontStack-monospace, ui-monospace, SFMono-Regular, SF Mono, Menlo, Consolas, Liberation Mono, monospace); font-size: 12pt; color: rgb(0, 0, 0);"><code style="font-family: var(--fontStack-monospace, ui-monospace, SFMono-Regular, SF Mono, Menlo, Consolas, Liberation Mono, monospace);">ath</code></span><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"> probably
makes sense. if not no need. -> direction seems to be making ath mandatory.</span></li></ol>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Openid-specs-digital-credentials-protocols <openid-specs-digital-credentials-protocols-bounces@lists.openid.net> on behalf of Lukasz Jaromin
via Openid-specs-digital-credentials-protocols <openid-specs-digital-credentials-protocols@lists.openid.net><br>
<b>Sent:</b> Tuesday, June 11, 2024 10:05 PM<br>
<b>To:</b> openid-specs-digital-credentials-protocols@lists.openid.net <openid-specs-digital-credentials-protocols@lists.openid.net><br>
<b>Cc:</b> Lukasz Jaromin <lukasz.jaromin@raidiam.com><br>
<b>Subject:</b> [Openid-specs-digital-credentials-protocols] Notes DCP WG + SIOP meeting minutes: Jun 11, 2024</font>
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Hi All,</p>
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Please find the meeting notes below.</p>
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Attendees: <span class="x_Apple-tab-span" style="white-space:pre"> </span></p>
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<span class="x_Apple-tab-span" style="white-space:pre"></span>- Kristina Yasuda</p>
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<span class="x_Apple-tab-span" style="white-space:pre"></span>- Jan Vereecken</p>
<p style="margin:0px; font-style:normal; font-variant-caps:normal; font-stretch:normal; font-size:13px; line-height:normal; font-family:"Helvetica Neue"; font-size-adjust:none; font-kerning:auto; font-variant-alternates:normal; font-variant-ligatures:normal; font-variant-numeric:normal; font-variant-east-asian:normal; font-feature-settings:normal">
<span class="x_Apple-tab-span" style="white-space:pre"></span>- Oliver Terbu</p>
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<span class="x_Apple-tab-span" style="white-space:pre"></span>- Elizabeth Garber</p>
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<span class="x_Apple-tab-span" style="white-space:pre"></span>- Paul Bastian</p>
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<span class="x_Apple-tab-span" style="white-space:pre"></span>- Sudesha Shetty</p>
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<span class="x_Apple-tab-span" style="white-space:pre"></span>- Lukasz Jaromin</p>
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<span class="x_Apple-tab-span" style="white-space:pre"></span>- Victor Lu</p>
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<span class="x_Apple-tab-span" style="white-space:pre"></span>- Daniel Fett</p>
<p style="margin:0px; font-style:normal; font-variant-caps:normal; font-stretch:normal; font-size:13px; line-height:normal; font-family:"Helvetica Neue"; font-size-adjust:none; font-kerning:auto; font-variant-alternates:normal; font-variant-ligatures:normal; font-variant-numeric:normal; font-variant-east-asian:normal; font-feature-settings:normal">
<span class="x_Apple-tab-span" style="white-space:pre"></span>- Michael Jones</p>
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<span class="x_Apple-tab-span" style="white-space:pre"></span>- Brian Campbell</p>
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<span class="x_Apple-tab-span" style="white-space:pre"></span>- Christian Bormann</p>
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<span class="x_Apple-tab-span" style="white-space:pre"></span>- Tobias Looker</p>
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<span class="x_Apple-tab-span" style="white-space:pre"></span>- John Bradley</p>
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<span class="x_Apple-tab-span" style="white-space:pre"></span>- Tom Jones</p>
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<span class="x_Apple-tab-span" style="white-space:pre"></span>- Sebastien Bahloul</p>
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Agenda:</p>
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Announcement to help with PRs. The number of issues is growing. </li><li style="margin:0px; font-style:normal; font-variant-caps:normal; font-stretch:normal; font-size:13px; line-height:normal; font-family:"Helvetica Neue"; font-size-adjust:none; font-kerning:auto; font-variant-alternates:normal; font-variant-ligatures:normal; font-variant-numeric:normal; font-variant-east-asian:normal; font-feature-settings:normal">
PRs and Issues. Call for specific PRs and/or issues that we should discuss? </li><ol>
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Batch credentials</li><li style="margin:0px; font-style:normal; font-variant-caps:normal; font-stretch:normal; font-size:13px; line-height:normal; font-family:"Helvetica Neue"; font-size-adjust:none; font-kerning:auto; font-variant-alternates:normal; font-variant-ligatures:normal; font-variant-numeric:normal; font-variant-east-asian:normal; font-feature-settings:normal">
c_nonce issue</li></ol>
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Issues</p>
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<li style="margin:0px; font-style:normal; font-variant-caps:normal; font-stretch:normal; font-size:13px; line-height:normal; font-family:"Helvetica Neue"; font-size-adjust:none; font-kerning:auto; font-variant-alternates:normal; font-variant-ligatures:normal; font-variant-numeric:normal; font-variant-east-asian:normal; font-feature-settings:normal">
<span style="font-style:normal; font-variant-caps:normal; font-stretch:normal; font-size:12px; line-height:normal; font-size-adjust:none; font-kerning:auto; font-variant-alternates:normal; font-variant-ligatures:normal; font-variant-numeric:normal; font-variant-east-asian:normal; font-feature-settings:normal"></span>VCI
#286 Encrypted responses in Batch and Deferred Endpoint <a href="https://github.com/openid/OpenID4VCI/issues/286">
<span style="color:#dca10d">https://github.com/openid/OpenID4VCI/issues/286</span></a> discussion on whether we do encryption</li><li style="margin:0px; font-style:normal; font-variant-caps:normal; font-stretch:normal; font-size:13px; line-height:normal; font-family:"Helvetica Neue"; font-size-adjust:none; font-kerning:auto; font-variant-alternates:normal; font-variant-ligatures:normal; font-variant-numeric:normal; font-variant-east-asian:normal; font-feature-settings:normal">
<span style="font-style:normal; font-variant-caps:normal; font-stretch:normal; font-size:12px; line-height:normal; font-size-adjust:none; font-kerning:auto; font-variant-alternates:normal; font-variant-ligatures:normal; font-variant-numeric:normal; font-variant-east-asian:normal; font-feature-settings:normal"></span>VCI
#189 Move Use Cases Appendix before Acknowledgements and Notices <a href="https://github.com/openid/OpenID4VCI/issues/189">
<span style="color:#dca10d">https://github.com/openid/OpenID4VCI/issues/189</span></a> Q: Any objection to do that? Yes</li><li style="margin:0px; font-style:normal; font-variant-caps:normal; font-stretch:normal; font-size:13px; line-height:normal; font-family:"Helvetica Neue"; font-size-adjust:none; font-kerning:auto; font-variant-alternates:normal; font-variant-ligatures:normal; font-variant-numeric:normal; font-variant-east-asian:normal; font-feature-settings:normal">
<span style="font-style:normal; font-variant-caps:normal; font-stretch:normal; font-size:12px; line-height:normal; font-size-adjust:none; font-kerning:auto; font-variant-alternates:normal; font-variant-ligatures:normal; font-variant-numeric:normal; font-variant-east-asian:normal; font-feature-settings:normal"></span>VCI
#233 Examples of signed JWTs do not always have valid signatures <a href="https://github.com/openid/OpenID4VCI/issues/233">
<span style="color:#dca10d">https://github.com/openid/OpenID4VCI/issues/233</span></a> We move on with it and have a volenteer wants to do it.</li><li style="margin:0px; font-style:normal; font-variant-caps:normal; font-stretch:normal; font-size:13px; line-height:normal; font-family:"Helvetica Neue"; font-size-adjust:none; font-kerning:auto; font-variant-alternates:normal; font-variant-ligatures:normal; font-variant-numeric:normal; font-variant-east-asian:normal; font-feature-settings:normal">
<span style="font-style:normal; font-variant-caps:normal; font-stretch:normal; font-size:12px; line-height:normal; font-size-adjust:none; font-kerning:auto; font-variant-alternates:normal; font-variant-ligatures:normal; font-variant-numeric:normal; font-variant-east-asian:normal; font-feature-settings:normal"></span>VCI
Pull #293 rework credential and batch credential endpoint <a href="https://github.com/openid/OpenID4VCI/pull/293">
<span style="color:#dca10d">https://github.com/openid/OpenID4VCI/pull/293</span></a> Please review it. It will be merged if there are two more approvals. Additional comments: PR is going to be merged, however this happens conditionally provided that we will
discuss VCI Issue #18. Tobias will create the issue to addresses the problem of an array with a single proof.</li><li style="margin:0px; font-style:normal; font-variant-caps:normal; font-stretch:normal; font-size:13px; line-height:normal; font-family:"Helvetica Neue"; font-size-adjust:none; font-kerning:auto; font-variant-alternates:normal; font-variant-ligatures:normal; font-variant-numeric:normal; font-variant-east-asian:normal; font-feature-settings:normal">
<span style="font-style:normal; font-variant-caps:normal; font-stretch:normal; font-size:12px; line-height:normal; font-size-adjust:none; font-kerning:auto; font-variant-alternates:normal; font-variant-ligatures:normal; font-variant-numeric:normal; font-variant-east-asian:normal; font-feature-settings:normal"></span>VCI
pull #336 add randomness to the credential_offer_uri <a href="https://github.com/openid/OpenID4VCI/pull/336">
<span style="color:#dca10d">https://github.com/openid/OpenID4VCI/pull/336</span></a> is ready to be merged</li><li style="margin:0px; font-style:normal; font-variant-caps:normal; font-stretch:normal; font-size:13px; line-height:normal; font-family:"Helvetica Neue"; font-size-adjust:none; font-kerning:auto; font-variant-alternates:normal; font-variant-ligatures:normal; font-variant-numeric:normal; font-variant-east-asian:normal; font-feature-settings:normal; color:rgb(220,161,13)">
<span style="font-style:normal; font-variant-caps:normal; font-stretch:normal; font-size:12px; line-height:normal; font-size-adjust:none; font-kerning:auto; font-variant-alternates:normal; font-variant-ligatures:normal; font-variant-numeric:normal; font-variant-east-asian:normal; font-feature-settings:normal; color:rgb(0,0,0)"></span><span style="color:#000000">VCI
Issue <a href="https://github.com/openid/OpenID4VCI/issues/301">https://github.com/openid/OpenID4VCI/issues/301</a> We will add clarification on it.</span></li><li style="margin:0px; font-style:normal; font-variant-caps:normal; font-stretch:normal; font-size:13px; line-height:normal; font-family:"Helvetica Neue"; font-size-adjust:none; font-kerning:auto; font-variant-alternates:normal; font-variant-ligatures:normal; font-variant-numeric:normal; font-variant-east-asian:normal; font-feature-settings:normal">
<span style="font-style:normal; font-variant-caps:normal; font-stretch:normal; font-size:12px; line-height:normal; font-size-adjust:none; font-kerning:auto; font-variant-alternates:normal; font-variant-ligatures:normal; font-variant-numeric:normal; font-variant-east-asian:normal; font-feature-settings:normal"></span>Olivier
explains c_nonce related issue <a href="https://github.com/openid/OpenID4VCI/issues/331">
<span style="color:#dca10d">https://github.com/openid/OpenID4VCI/issues/331</span></a> Discussion whether we need c_nonce or not. We looked at
<a href="https://github.com/openid/OpenID4VCI/issues/19"><span style="color:#dca10d">https://github.com/openid/OpenID4VCI/issues/19</span></a> while talking about it. The group is leaning towards keeping the c_nonce as required.</li></ul>
<div><font face="Helvetica Neue" size="2">Regards</font></div>
<div><font face="Helvetica Neue" size="2">LJ</font></div>
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