[Openid-specs-digital-credentials-protocols] WGLC for OpenID for Verifiable Presentations Final

Wed Apr 23 09:45:01 UTC 2025

Dear all,

as briefly discussed with Mirko: The following approach defined in Slid 12
fpr the document
https://docs.google.com/presentation/d/1s-MM27j4ZxACf0ecuVBGbuj8o4C5kr9g62jXeby0wso/edit?pli=1#slide=id.g3105e024338_0_7
is IMHO legally wrong acc. to the Implementing Act. The IA defines: no
policy, allow list or root of trust not an Attribute based access control.

With the background that embedded policies well-known (see signature
validation policy), any RP must be listed and identified by Registrar
anyway. Means the Registrar already has the identity and the property
"bank", "doctor", "Municipality Buxtehude". If this property is written in
the Access Certificate it can be proven by the wallet when RP requests
PID/EAA data. If the correct property e.g. "Bank" given that request is
proven correctly. The Root of Trust would be (QTSP--> QEAA) --> Access
Certificate --> Registrar. As those lists already exist e.g.banking
supervision authority, Medical Association etc. it seems not comprehensible
to create new complexitites especially as the access certificate is already
x509.
This is already possible with existing x509 and reusing the standards like
ETSI EN 319 411 family,.

And before the discussions comes: The issue here is not similar to W3CVCDM
that there might be no standard for authorization of RP - we already have
them.

Long Story short: I support Tom and also oppose to move OID4VP to public
review.

Best
Steffen

On Wed, Apr 23, 2025 at 10:26 AM steffen schwalm <
schwalm.steffen at googlemail.com> wrote:

> Joseph:
>
> As OIDF according to its own statements aims to define specifications in
> support of EUDI Wallet your statement "  given many things are out of
> scope for OID4VP and defined by local ecosystem requirements/laws" is
> highly dangerous. If OID4VP aims for EUDI any risk of legal breach as Tom
> assumes shall be avoided.
>
> means: if you believe that "OID4VP can also be used in a way that is
> compliant with such laws" --> exactly this way shall be defined as the only
> possible one to be in compliance with GDPR, eIDAS etc. Would be typical
> approach we know from ETSI, CEN, ISO.
>
> Currently looking at the mails I support Tom in his doubts.
>
> Beside this I oppose against to bring OID4VP in current version in next
> step: DCQL only requires to write query per credential format which is
> weird - in comparison to presentation exchange. Recommend to open the door
> for presentation exchange as optional possibility.
>
> Best
> Steffen
>
>
> On Wed, Apr 23, 2025 at 12:39 AM Joseph Heenan via
> Openid-specs-digital-credentials-protocols <
> openid-specs-digital-credentials-protocols at lists.openid.net> wrote:
>
>> Hi Tom
>>
>> To repeat what I added to on the issue a few days ago,
>> https://github.com/openid/OpenID4VP/issues/333#issuecomment-2816774542 :
>>
>> I've read back through this issue. There seem to be a number of questions
>> I've asked Tom that I've not obviously got answers to, such as "To try and
>> clarify: you agree that user consent is happening, your doubt is to whether
>> the consent is sufficiently informed?". Being unable to narrow down exactly
>> what Tom believes the problem is or isn't is significantly hampering
>> figuring out if there's a problem that needs to be solve in the
>> specification or not.
>>
>>
>> I think we've replied to every point Tom has raised, with the possible
>> exception of not fully replying to this one:
>>
>>
>> Digital identity wallets must ascertain the identity of Verifiers and
>> determine whether these Verifiers possess the necessary authorisation or
>> obligation to request Verifiable Credentials (VCs) or claims.
>>
>> I don't see how OID4VP provides that - all i see is a URL that the user
>> must decide whether to trust.
>>
>>
>> I already explained that OID4VP provides for this via
>> https://openid.github.io/OpenID4VP/openid-4-verifiable-presentations-wg-draft.html#name-client-identifier-prefix-an (for
>> example, x509_san_dns defined there does not require the user to declare
>> whether they trust a URL or not, it can be PKI certs that assert a trusted
>> name for the verifier etc) but it's perhaps also worth sharing that the
>> "possess the necessary authorisation or obligation to request Verifiable
>> Credentials (VCs) or claims." part is being solved in an EU specific way,
>> there was a presentation about this at the recent IIW:
>>
>>
>> https://docs.google.com/presentation/d/1s-MM27j4ZxACf0ecuVBGbuj8o4C5kr9g62jXeby0wso/edit#slide=id.g34994030800_0_349
>>
>>
>> My understanding of the current situation:
>>
>>
>>
>>    1. Tom believes that OID4VP can be used in ways that are not
>>    compliant with laws such as EU GDPR / EUDI wallet regulations (a point that
>>    I believe there is agreement on, given many things are out of scope for
>>    OID4VP and defined by local ecosystem requirements/laws)
>>    2. Tom doesn't like the way verifier authentication was done at the
>>    California hackathon.
>>    3. Everyone (except for Tom?) seems to believes OID4VP can also be
>>    used in a way that is compliant with such laws
>>
>>
>> Is this a correct summary?
>>
>> (Mirko also added a comment with more detail on how this would work in
>>
>> Thanks
>>
>> Joseph
>>
>>
>> On 18 Apr 2025, at 11:35, Tom Jones <thomasclinganjones at gmail.com> wrote:
>>
>> i do not believe the spec is ready.
>> see https://github.com/openid/OpenID4VP/issues/333
>>
>> Peace ..tom jones
>>
>>
>> On Sat, Apr 12, 2025 at 2:12 PM Joseph Heenan via
>> Openid-specs-digital-credentials-protocols <
>> openid-specs-digital-credentials-protocols at lists.openid.net> wrote:
>>
>>> Dear DCP Working Group Members,
>>>
>>> As discussed on the Friday working group call we would like to get WG
>>> consensus that the OpenID4VP draft is ready to start the final
>>> specification approval process.
>>>
>>> Please respond to this email within the next 7 days, by end of Sunday
>>> 20th April, whether you believe the draft should proceed to the public
>>> review or not.
>>>
>>> The OpenID4VP document to be reviewed can be found here:
>>> https://openid.net/specs/openid-4-verifiable-presentations-1_0-26.html
>>>
>>> There are a couple of normative changes that we discussed during the
>>> working group meeting on Friday to work on during working group last call:
>>>
>>> 1. revamp vp formats: https://github.com/openid/OpenID4VP/pull/500
>>>
>>> 2. Specifies value matching for mdocs via a reference to cbor-to-json:
>>> https://github.com/openid/OpenID4VP/pull/538
>>>
>>> 3. Remove references to ISO 18013-7 to avoid confusion due to it using
>>> OID4VP ID2:  https://github.com/openid/OpenID4VP/issues/519
>>>
>>> 4. Remove anoncreds for now (hoping to add it back in 1.1) due to lack
>>> of implementation experience with DCQL etc:
>>> https://github.com/openid/OpenID4VP/pull/539
>>>
>>> We’d also expect some editorial/non-normative changes during WGLC.
>>>
>>> We also discussed scheduling a meeting to talk about the sd-jwt vcld pr:
>>> https://github.com/openid/OpenID4VP/pull/459 (a separate email about
>>> this will follow shortly.)
>>>
>>> If there are other topics working group members think need to be handled
>>> before the specification moves to final please reply to this email with
>>> details.
>>>
>>> This is very much just a step on the journey, and it is likely that
>>> comments will arrive during the 60 day review period that the working group
>>> chooses to fix before the voting period starts.
>>>
>>> The details of the specification approval process can be found here:
>>> https://openid.net/wg/resources/approving-specifications/.
>>>
>>> This email is about the first bullet point on this list "Obtain working
>>> group consensus to propose foundation-wide approval of the draft
>>> specification", which is often called Working Group Last Call (WGLC).
>>> The following steps are to start a 60-day Foundation-wide review,
>>> followed by the 7 day voting period (the poll itself will open 7 days
>>> before the end of the Foundation-wide review ends).
>>>
>>> Kindest Regards,
>>> Editors & Chairs
>>>
>>> --
>>> Openid-specs-digital-credentials-protocols mailing list
>>> Openid-specs-digital-credentials-protocols at lists.openid.net
>>>
>>> https://lists.openid.net/mailman/listinfo/openid-specs-digital-credentials-protocols
>>>
>>
>> --
>> Openid-specs-digital-credentials-protocols mailing list
>> Openid-specs-digital-credentials-protocols at lists.openid.net
>>
>> https://lists.openid.net/mailman/listinfo/openid-specs-digital-credentials-protocols
>>
>
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