Trust Registry Protocol v2 - Loose Capture

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:

• Trust Continuum - Scott Perry's - Trust Decision...
• Trust Assurance Companion - https://trustoverip.org/wp-content/uploads/ToIP-Trust-Assurance-Companion-Guide-V1.0-2021-10-19.pdf
• Trust Assurance & Cerfification - https://trustoverip.org/wp-content/uploads/ToIP-Trust-Assurance-and-Certification-Controlled-Document-Template-V1.0-2021-10-19.pdf

2022-11-24

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