Trust Registry Protocol v2 - Loose Capture

Owned by Darrell O'Donnell
Last updated: Nov 24, 2022
2 min read

Christine Martin we will capture high-level requirements and tasks here. 



The v1 protocol provides answers for three main questions

  • Is this Issuer Authoritative to issue a particular credential type under a governance framework.
  • Is a Verifier Authorized to request a presentation under a governance framework.
  • Does the answering Trust Registry acknowledge another Trust Registry under a governance framework. 


The analogy we have been using about the v1.0 protocol is that it handles the simplest (but powerful) questions - it is the tip of the iceberg.

Key Areas to Consider for v2:

  • Trust Registry Metadata - what data are needed by systems to understand a Trust Registry
  • Centralized / Decentralized - what does this question even mean?
  • Credential Information/Metadata - 
    • Credential Names - how do we name these things?
    • Credential Types - JWT, JSON-LD, AnonCreds, SD-JWT, etc. 
      • There are numerous flavours of VCs and much debate. This is a problem that Trust Registries can help. They can provide answers where there aren't any in the "we are compliant with W3C Verifiable Credentials" statement.
      • The use of Credential Types in Trust Registries will answer the question of "what credential format are ACTUALLY used?"
    • Schema Definitions - provide the data or a pointer to the data (e.g. on ledger)
    • Credential Definitions if required (AnonCreds requires) - provide the data or a pointer to the data
  • Proof/Presentation Metadata
    • What proof/presentation requests are supported and by whom can they be made? e.g. the overused driver license - who can request the full DL, versus an "age of majority" ZKP or some selective disclosure profile.
    • What should be done for inappropriate requests - should they be reported?
  • DID Metadata
    • What DID Methods are supported
    • What other expectations are at play (e.g. must support did:method:identifier:GetCapabilities  or something similar.
  • Wallet Metadata
    • What wallets are approved (and how) in the ecosystem
  • Holder Metadata
    • A
  • Other technical things
    • Key Bindings
    • DIDAuth - is DIDAuth (its real-world implementations)
    • Service Discovery - 

BACKGROUNDERS:

2022-11-24

  • Antti - connection is underlying
  • TRs help create context for connection (and more)