Re: FW: Selective Disclosure for W3C Data Integrity

Thanks for the pointers and reference Daniel! Nice that ACDC 
(Authenticated Chained Data Containers and not the band) uses 
JSON-Schema’s boolean operators. When teaching “web programming” classes 
would always teach my students a bit of JSON-Schema and have them use 
the super popular AJV <https://www.npmjs.com/package/ajv> library in 
implementations. Do the Trust Over IP folks have any more requirements 
specified in this area?

Cheers

Greg B.

On 6/16/2023 1:43 AM, Daniel Hardman wrote:

> >What Luca and I have been discussing is ways to control the 
> “atomicity” or “bundling” of attributes, i.e., things that must be 
> revealed together or not at all.
>
> The graduated disclosure scheme in ACDCs 
> (https://trustoverip.github.io/tswg-acdc-specification/draft-ssmith-acdc.html#name-graduated-disclosure-and-co) 
> allows an issuer to identify things that must be disclosed together, 
> and to build an arbitrarily complex hierarchy of rules about such 
> things. Thus, for attributes A-Z, the issuer can decide ahead of time, 
> "If disclosing any attributes M-Z, M-O can be disclosed individually, 
> but there is a cluster of disclosure around attribute P-R, such that 
> if P is revealed, Q and R must also be revealed." This leaves the 
> holder in charge of making disclosing decisions, but allows the issuer 
> to guarantee that its assertions will never to be taken out of context.
>
> ACDCs do this using JSON-Schema's boolean operators such as oneOf, 
> anyOf, etc. A variation on this approach could probably be adapted to 
> other serialization schemes. ACDCs provide support for JSON, CBOR, and 
> MsgPack.
>
> --Daniel
>
​