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The objective of this Task Force is to develop the ToIP Trust Registry Protocol as a TSS (ToIP Standard Specification)ToIP Specification. The purpose of this deliverable to enable interoperability between ToIP-compliant trust registries.
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The mission of the ToIP Foundation is to define a complete architecture for Internet-scale digital trust that combines cryptographic trust at the machine layer with human trust at the business, legal, and social layers. The ToIP stack has two parallel halves—a governance technical stack and a technical governance stack—operating at four layers 1) Utility (DLT Blockchain), 2) Provider ( Agent/Wallet), 3) Credential Exchange (Issuer/Verifier/Holder) and 4) Ecosystem (Application). See further details in the ToIP white paper and the ToIP RFC.
A core role within ToIP Layer 4 is a trust registry (previously known as a member directory). This is a network service that enables a governing authority for an ecosystem governance framework (EGF) to specify what governed parties are authorized to perform what actions under the EGF. For example:
- What issuers are authorized to issue what types of verifiable credentials.
- What verifiers are authorized to request what types of verifiable presentations.
- What other trust registries (and their governing authorities) are trusted by a host trust registry.
As with all layers of the ToIP stack, the purpose of a TSS a ToIP specification is to enable the technical interoperability necessary to support transitive trust across different trust communities implementing the ToIP stack. In this case, the desired interoperability outcome is a common protocol that works between any number of decentralized trust registries operated by independent governing authorities representing multiple legal and business jurisdictions. One specific example of this need is the digital trust ecosystem defined by the Interoperability Working Group for Good Health Pass (GHP). The GHP Trust Registries Drafting Group produced an extensive set of recommended requirements for a GHP-compliant trust registry.
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