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RE: New Paper on VC Flavors

From: John, Anil <anil.john@hq.dhs.gov>
Date: Thu, 11 Feb 2021 21:42:29 +0000
To: Kaliya IDwoman <kaliya-id@identitywoman.net>, Credentials CG <public-credentials@w3.org>
Message-ID: <MN2PR09MB5626C85D3D24B6BD65673202C58C9@MN2PR09MB5626.namprd09.prod.outlook.com>
Very helpful and understandable paper, Kaliya. Thank you!

Best Regards,


Anil John
Technical Director, Silicon Valley Innovation Program
Science and Technology Directorate
US Department of Homeland Security
Washington, DC, USA

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From: Kaliya IDwoman <kaliya-id@identitywoman.net>
Sent: Thursday, February 11, 2021 1:39 PM
To: Credentials CG <public-credentials@w3.org>
Subject: New Paper on VC Flavors

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 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/<https://urldefense.us/v2/url?u=https-3A__www.lfph.io_2021_02_11_cci-2Dverifiable-2Dcredentials-2Dflavors-2Dand-2Dinteroperability-2Dpaper_&d=DwMFaQ&c=2plI3hXH8ww3j2g8pV19QHIf4SmK_I-Eol_p9P0CttE&r=FUgYmx6LTIaPqn7QR6TBfzml-fqCTpab-djgqlCFtgU&m=Vay_IWys0pWf98Glm-7muB89AGbID9NfQMBDcsrPqQM&s=-zNAAgiqLvZsbasvKGLxTIC0ia9LqBKGEcln-J2qv0U&e=>

  The PDF can be found here. https://www.lfph.io/wp-content/uploads/2021/02/Verifiable-Credentials-Flavors-Explained.pdf<https://urldefense.us/v2/url?u=https-3A__www.lfph.io_wp-2Dcontent_uploads_2021_02_Verifiable-2DCredentials-2DFlavors-2DExplained.pdf&d=DwMFaQ&c=2plI3hXH8ww3j2g8pV19QHIf4SmK_I-Eol_p9P0CttE&r=FUgYmx6LTIaPqn7QR6TBfzml-fqCTpab-djgqlCFtgU&m=Vay_IWys0pWf98Glm-7muB89AGbID9NfQMBDcsrPqQM&s=Yc32QJWeIS87LZrJhilc8xCWrRc1xhu4o60LQJNc208&e=>

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

(image/png attachment: image003.png)

Received on Thursday, 11 February 2021 21:43:15 UTC

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