# S.I.G.N.

- [Overview](/s.i.g.n./sign.md): Sovereign-grade digital infrastructure for national systems of money, identity, and capital.
- [Reference Architecture](/s.i.g.n./reference-architecture.md): Reference architecture for S.I.G.N. (Money, ID, Capital) and how Sign Protocol + TokenTable compose across public/private rails.
- [Security & Privacy](/s.i.g.n./security-privacy.md): Security and privacy model for S.I.G.N. including data placement, selective disclosure, audit access controls, and operational security practices.
- [Governance & Operations](/s.i.g.n./governance-ops.md): Governance and operations model for sovereign deployments including roles, key custody, change management, SLAs, and audit readiness.