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.