Re: FW: Selective Disclosure for W3C Data Integrity

On Mon, Jun 19, 2023 at 1:41 AM Luca Boldrin <luca.boldrin@infocert.it> wrote:
> Thank you Manu for your very analytic response! Indeed it helps a lot.

Good, glad it helped. :)

> On “credential schema” you are right, I was imprecise. In fact I had in mind something like EBSI’s  “trusted schema registry”, i.e. the association between issuers and the types of credentials they can issue

Ah, yes, we were talking about different things.

> On “revocation registry”, well, I expect every credential (including atomic ones) to be revokable. Hence I expect the revocation process to be more complex if the verifier needs to check 10 atomic credentials instead of 1 composite credential. Isn’t it?

If you take the atomic credentials approach, then yes, it's more
complicated because you have to check 10 atomic credentials for
revocation.

HOWEVER, if you use something like ecdsa-sd, then there is only one
revocation list (which you have to mandatorily disclose), but you can
still selectively disclose other statements in the VC. So, it's no
more complex (from a revocation standpoint) than a single VC.

> On the intricacies of selective disclosure, I do agree, I also believe it will take time for a full understanding. But I also have the feeling that most concrete use cases can be managed with simple atomic credentials (at least, from my limited perspective based on EU identity wallet use cases...).

Yes, possibly. Personally, I think it's too early to tell, and the
fact that we have selective disclosure technologies now that can be
deployed in parallel to get market feedback is a good thing. There are
very few examples of a single technology or a single approach being
the way that something is done globally.

Selective disclosure is no different and so we'll need to find ways to
ensure that multiple approaches can be taken (without increasing
technical complexity to the point where only large tech companies can
compete -- case in point -- web browsers, operating systems, cloud
services, etc.)

-- manu

-- 
Manu Sporny - https://www.linkedin.com/in/manusporny/
Founder/CEO - Digital Bazaar, Inc.
https://www.digitalbazaar.com/

Received on Monday, 19 June 2023 17:08:58 UTC