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Summary

Call Link: https://zoom.us/j/97954159540?pwd=WWk3WmQ3MVh1SXBYZGVreGl0QllGdz09

Recording:

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No Meeting Held, No Recording Made

Notices: 

This specification creating group operates under the Linux Foundation Community Specification License v1.0.

Meeting Attendees

Stephen Curran (BC Gov / Cloud Compass Computing Inc.) <swcurran@cloudcompass.ca>

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• Recent changes toward eliminating dependencies on Ursa
  • AnonCreds CL Signatures
  • Indy BLS Signatures
  • Aries BBS Signatures
• PRs to Review
• Remaining Work
• Other discussionsOpen discussion

Future Calls

To Dos:

• Issue to talking about what AnonCreds verifies and what is left to the issuer to verify.
• Issue #140 should WQL be allowed in a Presentation Request?
  • WQL is supported currently in the Indy SDK, but not in the Aries Frameworks
  • Should it be in the specification?
  • If so, in what form. From Sam Curren — don't call it WQL if we do include it – just describe it.
  • Not used and it is not clear there is a good reason to support it.
  • Complicates the specification and the implementation.
  • Decision:
    • Not supported in the specification – let's keep it out in this version
• Revocation Interval
  • Approach to determine if the holder used an acceptable RevRegistry – see this Issue comment
  • Who calls the AnonCreds method to get the Revocation Registry from the ledger for verification
    • Verifier or AnonCreds?
  • To set "validation" to true/false based on the RevRegEntry timestamp in relation to the revocation interval?  Presentation 
  • Key points:
    • 1. an RevRegEntry is “current” from the time it is written, to the time of the next RevRegEntry
    • 2. “within the interval” is based on when a RevRegEntry is “current” (see 1.), not its timestamp.
    • 3. AnonCreds or the Verifier (calling AnonCreds) should calculate “within interval” (using 2.) and mark verification true if the RevRegEntry used by the Prover is within the interval, else false.
      • Dangers:
        • False-Negatives: If a strict "timestamp used is between from, to" and not based on when a RevReg is "current" (per 2.), we will get "not verified" incorrectly.
        • False-Positives: If we don't do any checking of the timestamp and the interval, the holder could incorrectly use an old RevRegEntry.
    • 4. General point: AnonCreds should return both a summary (true/false) and if false, additional data about why it was false.
  • Decision – add an optional `at_from_ts` set of entries, one per NRP, that AnonCreds can use for determining if the holder_ts is within the Presentation Request interval.

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