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<div class="moz-cite-prefix">On 02/12/2022 13:48, Torsten
Lodderstedt wrote:<br>
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<div class="">Am 02.12.2022 um 12:46 schrieb David Chadwick
<<a href="mailto:d.w.chadwick@verifiablecredentials.info"
class="moz-txt-link-freetext" moz-do-not-send="true">d.w.chadwick@verifiablecredentials.info</a>>:</div>
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<div class="moz-cite-prefix">On 02/12/2022 11:24, Torsten
Lodderstedt wrote:<br class="">
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cite="mid:5C35187F-2B74-46C6-8AB4-928400230F88@lodderstedt.net"
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Hi David,
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<div class="">Am 23.11.2022 um 19:14 schrieb David
Chadwick via Openid-specs-ab <<a
href="mailto:openid-specs-ab@lists.openid.net"
class="moz-txt-link-freetext"
moz-do-not-send="true">openid-specs-ab@lists.openid.net</a>>:</div>
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<p class="">Hi Torsten</p>
<p class="">excellent work. I fully support
its adoption by the WG</p>
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Thanks.<br class="">
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<p class="">I note however that if the
Verifier uses a QR code to kick off the
transaction, then the wallet could equally
well display a QR code containing the
vp_token (assuming the VC is small enough)
in which case BLE will not be needed. This
flow should be supported.</p>
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<div class="">Do you mean the wallet would show a QR
code in response to the request encoded in the
verifier’s QR code?</div>
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<p class="">Yes, the wallet can display a QR code in
answer to the verifier's request (in a QRcode). This
only works for small VP/VC due to the size restrictions
of QR codes, </p>
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<div>The QR code only contains a small amount of data sufficient
to establish a secure connection. The presentation request
itself is sent over BLE. Putting the whole request in the QR
Code would result in a much bigger QR Code. <br>
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<p>So you are using the ISO mDL model where the initial message only
kicks off the BLE, then the request and response are sent via BLE.
I misunderstood. I thought the request was in the QRcode (as per
the cross device flow) and would have an additional parameter such
as UseBLE=True; - a bit like we do with Post=True for the
response)</p>
<p>If you use this model then you dont need a special message to
kick off the BLE do you?<br>
</p>
<blockquote type="cite"
cite="mid:E5E4913C-2F58-4D54-ACCA-1D16198989E2@lodderstedt.net">
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<div>I would suggest to treat this is a another protocol besides
BLE. <br>
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<p>Surely it would be better if the RP could display one QRcode with
it containing the choices that the wallet can take, instead of
multiple QR codes each for a different mode of interaction?</p>
<p>Kind regards</p>
<p>David<br>
</p>
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cite="mid:E5E4913C-2F58-4D54-ACCA-1D16198989E2@lodderstedt.net">
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<p class="">but it will be a lot simpler than setting up a
BLE session (which I always find is tedious to do - e.g.
between my car and mobile phone).</p>
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You don’t need to setup a BLE session yourself with the QR Code
approach. That will happen automatically. UX is key! </div>
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<p class="">Kind regards</p>
<p class="">David<br class="">
</p>
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cite="mid:5C35187F-2B74-46C6-8AB4-928400230F88@lodderstedt.net"
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<div class="">best regards.</div>
<div class="">Torsten. </div>
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<p class="">Kind regards</p>
<p class="">David<br class="">
</p>
<div class="moz-cite-prefix">On 23/11/2022
17:52, Torsten Lodderstedt via
Openid-specs-ab wrote:<br class="">
</div>
<blockquote type="cite"
cite="mid:025D3FE0-0599-48BA-8E02-A2B1259E09D4@lodderstedt.net"
class="">
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Hi all,
<div class=""><br class="">
</div>
<div class="">Kristina, Kenichi, Sasi,
Ramesh, and myself have been working for a
couple of month on a specification to
enable VC presentation over BLE. </div>
<div class=""><br class="">
</div>
<div class="">Here is the link the
individual draft: <a
href="https://tlodderstedt.github.io/openid-for-verifiable-presentations-offline-1_0-00.html"
class="moz-txt-link-freetext"
moz-do-not-send="true">https://tlodderstedt.github.io/openid-for-verifiable-presentations-offline-1_0-00.html</a></div>
<div class=""><br class="">
</div>
<div class="">We think this would be a
valuable extension to the OpenID 4 VCs
protocol family as it would allow offline
presentation (e.g. at the entrance of a
conference or a restaurant) using the
mechanisms we already have in OpenID4VPs.</div>
<div class=""><br class="">
</div>
<div class="">An implementation of the spec
is under way at MOSIP. </div>
<div class=""><br class="">
</div>
<div class="">We ask the WG to consider this
draft for adoption as WG document. </div>
<div class=""><br class="">
</div>
<div class="">best regards,</div>
<div class="">Torsten </div>
<br class="">
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