Portable Trust Infrastructure
Portable Trust Infrastructure
Introduction to PTI
An infrastructure category for systems that produce, exchange, resolve, and consume trust across contexts, with portability, explainability, consent, and governance.
Portable Trust Infrastructure (PTI) separates trust production from trust consumption. Trust producers emit verifiable activity; the trust exchange normalizes signals into a governed trust graph; trust consumers resolve context-scoped intelligence at decision time.
Core outcomes
- Portable identity: each subject receives a persistent
pti_idacross producers and contexts. - Context-scoped intelligence: lending, merchant, rental, and other trust contexts remain isolated.
- Provenance: score changes trace to trust events, evidence, and policy, not opaque batch reruns.
- Governed exchange: consent, privacy, and audit are infrastructure concerns, not afterthoughts.
Architectural roles
| Role | Responsibility |
|---|---|
| Trust producer | Emits trust events from verified activity |
| Trust consumer | Resolves trust lookups at decision time |
| Trust exchange | Normalizes, governs, and routes trust signals |
| Trust registry | Maintains contexts, policies, and participant metadata |
| Trust intelligence engine | Computes context scores with explainability |
Trust flow
Where to read next
| Topic | Document |
|---|---|
| Why PTI exists | Why PTI exists |
| PTI vs TumiTrust | PTI and TumiTrust |
| Architecture stack | Trust infrastructure stack |
| Design principles | Core Design Principles |
| Normative specification | PTI Specification v1.0 |
| Reference architecture | Reference Architecture |
| Reference implementation | TumiTrust reference implementation |
| Build a compatible platform | Build Your Own PTI |
Reference implementations
PTI is implementation-independent. TumiTrust is the flagship reference implementation, providing product guides, platform APIs, and operational documentation under TumiTrust Documentation.