Re: [Agenda] W3C CCG 2024-05-07 - Parallel Signatures in Verifiable Credentials

Hi Manu,

I’ve caught up with the recording and I’m left with some interrogations that were not addressed in the presentation nor the Q&A:


  *   When deriving an ECDSA-SD credential for sharing with the verifier, the only proof part of the presented document is the ecdsa-sd proof, dropping all other potential parallel proofs. Which is fine when parallel proofs are used as way to be able to present the document with various degrees of anonymity as presented in the call, but could prove problematic if parallel proofs represent different individuals/issuers who signed the same document, and more importantly so when the document holds a proof chain. Do we have to sacrifice privacy in both those cases and not use SD proofs?
  *   It is said in the presentation that the verifier specifies which type of signature they accept. However I just wanted to clarify that it remains the wallet’s responsibility to allow for SD derivation/proof type selection?


Thanks

From: Manu Sporny <msporny@digitalbazaar.com>
Date: Tuesday, 7 May 2024 at 15:03
To: Harrison <harrison@spokeo.com>
Cc: W3C Credentials CG (Public List) <public-credentials@w3.org>
Subject: [EXTERNAL] [jfraichot@learningmachine.com] Re: [Agenda] W3C CCG 2024-05-07 - Parallel Signatures in Verifiable Credentials
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On Wed, May 1, 2024 at 3:54 PM Harrison <harrison@spokeo.com> wrote:
> Main Agenda: Parallel Signatures in Verifiable Credentials

Slide deck can be found here:

https://urldefense.com/v3/__https://docs.google.com/presentation/d/19uepe7zinY0MKdTkLkDu_bPX2P4BDj6mmFPtRjCfJX8/edit*__;Iw!!C8mu0vCj!ZSzM6vd_K2qUgp0XpAzqjqczVN5P75_whbXO5OkSNW9mkS46q3K8THvlPow0gr--_kzMfpRBJnRQSLO16YtfBgsqatrj$<https://urldefense.com/v3/__https:/docs.google.com/presentation/d/19uepe7zinY0MKdTkLkDu_bPX2P4BDj6mmFPtRjCfJX8/edit*__;Iw!!C8mu0vCj!ZSzM6vd_K2qUgp0XpAzqjqczVN5P75_whbXO5OkSNW9mkS46q3K8THvlPow0gr--_kzMfpRBJnRQSLO16YtfBgsqatrj$>

-- manu

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