W3C home > Mailing lists > Public > public-credentials@w3.org > June 2022

Re: Credential Chaining

From: George Lund <george.lund@digital.cabinet-office.gov.uk>
Date: Wed, 29 Jun 2022 18:03:15 +0100
Message-ID: <CAAYH0CXkT_2rnHJJptxtkqFaZ8NgmeTDPPgV89etCD2594UCEQ@mail.gmail.com>
Cc: public-credentials@w3.org
There's also the possibility of using a hashlink to reference another
credential per https://www.w3.org/TR/vc-imp-guide/#hashlinks (I think?)

On Wed, 29 Jun 2022 at 17:46, Manu Sporny <msporny@digitalbazaar.com> wrote:

> On 6/29/22 12:33 PM, Brent Shambaugh wrote:
> > Is there such a thing as credentials that can only be issued if the
> holder
> > already has a particular credential?
>
> Is there such a thing as that concept? Yes.
>
> Has someone implemented this? Depends on how you define "chaining".
>
> If you mean you use one credential to get another credential:
>
> Digital Bazaar has (in a proof of concept capacity) demonstrated the
> consumption of a digital identification credential issued by a government
> to
> receive a TruAge age verification credential.
>
> If you mean, you embed one credential inside another credential:
>
> I believe some of the VC EDU folks are exploring that use case... and yes,
> if
> you use VCs that are protected by Data Integrity (was Linked Data
> Signatures),
> then you can do arbitrary nesting of digitally signed VCs.
>
> -- manu
>
> --
> Manu Sporny - https://www.linkedin.com/in/manusporny/
> Founder/CEO - Digital Bazaar, Inc.
> News: Digital Bazaar Announces New Case Studies (2021)
> https://www.digitalbazaar.com/
>
>
>

-- 
George Lund
Technical Architect
Digital Identity Programme
Government Digital Service
Received on Wednesday, 29 June 2022 17:03:39 UTC

This archive was generated by hypermail 2.4.0 : Wednesday, 29 June 2022 17:03:41 UTC