New Paper on VC Flavors

Hi CCG,

 I wanted to share a paper that I wrote which was just published by
LFPH/CCI  -
https://www.lfph.io/2021/02/11/cci-verifiable-credentials-flavors-and-interoperability-paper/

  The PDF can be found here.
https://www.lfph.io/wp-content/uploads/2021/02/Verifiable-Credentials-Flavors-Explained.pdf

The first part of the paper elaborated on the following three data formats
of VCs by walking through a credential lifecycle:

   - JSON-LD family with LD Signatures or with BBS+ Signatures that enable
   Zero Knowledge Proofs (ZKP or ZKPs)
   - JSON with JSON Web Signatures, precisely in the form of a JSON Web
   Token (JWT)
   - ZKP with Camenisch-Lysyanskaya Signatures (ZKP-CL)


The second part discussed at length the differences between JSON and
JSON-LD and the differences between the two different ways to express ZKPs,
namely ZKP-CL and the newest flavor JSON-LD ZKP with BBS+, which is being
well received.

I hope it can help reduce the confusion in the market and support
convergence.

- Kaliya