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

Re: Request for Presenters: In-Person Presentation of Credentials

From: Shawn Butterfield <sbutterfield@salesforce.com>
Date: Thu, 31 Mar 2022 08:00:17 -0700
Message-ID: <CADtMrnAyWxjVqDhx8mNi_f-2_5JavDW3xwrQbo5RYjq8QZ0dGQ@mail.gmail.com>
To: Manu Sporny <msporny@digitalbazaar.com>
Cc: public-credentials@w3.org
Thanks for the extra information, James. I'm very excited about your use
case and I'd love to see it demonstrated live sometime!
Also, thanks to DigitalBazaar for the great libraries, I agree they are
extraordinarily valuable for bootstrapping VC work.

Butters @ Salesforce | Software Architect


On Thu, Mar 31, 2022 at 7:56 AM Manu Sporny <msporny@digitalbazaar.com>
wrote:

> On 3/30/22 7:59 PM, James Chartrand wrote:
> > The letters, which are PDFs, include a QR that encodes (via CBOR-LD) a
> > complete Verifiable Credential (all using the wonderful libraries from
> > Digital Bazaar - thank you!)  Again the QR is NOT a link to a VC, but
> > rather contains the entire VC.  The VC confirms the information that
> > appears as text in the PDF.
>
> James, this is amazing; we had no idea! We're glad that you found Digital
> Bazaar's open source libraries useful! Please let us know if you hit any
> snags
> so we can improve any rough edges you experienced.
>
> I'm particularly interested in the specific VC you encoded and how well it
> did/didn't compress; happy to provide some insight if that would be useful.
>
> > Yes, absolutely right - it is a Verifiable Presentation.  We’re using
> the
> > Digital Bazaar vpqr library:
>
> Neat! You're definitely using the library for its intended purpose. Some
> inside baseball:
>
> We have committed to CBOR-LD and the use of the VPQR "VP1-*" output format
> for
> production. We've also committed to the Ed25519Signature2020 suite for
> production, though we do expect it's successor "eddsa-2022" (exact same
> signature format, but different `type` and `cryptosuite` value) to also
> become
> ratified in the VC2WG.
>
> We are also exploring a "VPR1-*" format for purely local, purely optical
> (QR
> Code) VC exchange, AND for bootstrapping from an optical carrier (QR Code)
> into a wireless protocol (NFC, Bluetooth, WiFi, LTE, etc.).
>
> There are some design decisions that we had to make there that are not
> widely
> known, like avoiding protocol schemes and App Links in QRCodes (for the
> same
> reasons they're problematic when used in mobile). I expect the recent CHAPI
> conversation to uncover more of those design decisions.
>
> In any case, really neat work, James -- you made my day! :)
>
> -- manu
>
> --
> Manu Sporny -
> https://urldefense.com/v3/__https://www.linkedin.com/in/manusporny/__;!!DCbAVzZNrAf4!SCtyUWNfb__fIJkg6NQsjHJLuQZgCCfDejy0XsjLM3wWlVLeq33YNc_4We4harXOZyjhtQ$
> Founder/CEO - Digital Bazaar, Inc.
> News: Digital Bazaar Announces New Case Studies (2021)
>
> https://urldefense.com/v3/__https://www.digitalbazaar.com/__;!!DCbAVzZNrAf4!SCtyUWNfb__fIJkg6NQsjHJLuQZgCCfDejy0XsjLM3wWlVLeq33YNc_4We4harXdo8CBJA$
>
>
>
Received on Thursday, 31 March 2022 15:02:30 UTC

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