[Openid-specs-ab] OpenID for Verifiable Presentations over BLE (Request for WG Adoption)

[Torsten Lodderstedt]

> Am 02.12.2022 um 12:46 schrieb David Chadwick <d.w.chadwick at verifiablecredentials.info>:
> 
> 
> 
> On 02/12/2022 11:24, Torsten Lodderstedt wrote:
>> Hi David,
>> 
>>> Am 23.11.2022 um 19:14 schrieb David Chadwick via Openid-specs-ab <openid-specs-ab at lists.openid.net <mailto:openid-specs-ab at lists.openid.net>>:
>>> 
>>> Hi Torsten
>>> 
>>> excellent work. I fully support its adoption by the WG
>>> 
>>> 
>> 
>> Thanks.
>>> 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.
>>> 
>> Do you mean the wallet would show a QR code in response to the request encoded in the verifier’s QR code?
> 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,
> 
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. 

I would suggest to treat this is a another protocol besides BLE. 
> 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).
> 
> 

You don’t need to setup a BLE session yourself with the QR Code approach. That will happen automatically. UX is key! 
> Kind regards
> 
> David
> 
>> 
>> best regards.
>> Torsten. 
>>> 
>>> Kind regards
>>> 
>>> David
>>> 
>>> On 23/11/2022 17:52, Torsten Lodderstedt via Openid-specs-ab wrote:
>>>> Hi all,
>>>> 
>>>> Kristina, Kenichi, Sasi, Ramesh, and myself have been working for a couple of month on a specification to enable VC presentation over BLE. 
>>>> 
>>>> Here is the link the individual draft: https://tlodderstedt.github.io/openid-for-verifiable-presentations-offline-1_0-00.html <https://tlodderstedt.github.io/openid-for-verifiable-presentations-offline-1_0-00.html>
>>>> 
>>>> 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.
>>>> 
>>>> An implementation of the spec is under way at MOSIP. 
>>>> 
>>>> We ask the WG to consider this draft for adoption as WG document. 
>>>> 
>>>> best regards,
>>>> Torsten 
>>>> 
>>>> 
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