Reference architecture for @SignOfficial (Money, ID, Capital) and how Sign Protocol + TokenTable compose across public/private rails.

Purpose

This page defines a reference architecture for S.I.G.N. deployments. It is written to be:

  • implementation-neutral (works with different sovereign constraints),

  • operator-friendly (clear roles and trust boundaries),

  • audit-ready (explicit evidence artifacts),

  • integration-ready (legacy rails + standards).

Audience

  • Sovereign operators (central bank infra, GovTech platform teams)

  • System integrators (banks/PSPs/telcos, identity vendors)

  • Builders (wallets, program operators, auditors)

Architectural invariants

S.I.G.N. is designed around five invariants:

  1. Controllable privacy

    • private to the public,

    • auditable to lawful authorities,

    • minimal disclosure by default.

  2. National performance

    • built for millions of users, multi-operator workflows, strict SLAs.

  3. Sovereign control

    • key custody, upgrades, emergency controls, and oversight remain under sovereign governance.

  4. Interoperability

    • standards-aligned identity (VC/DID),

    • standards-aware payments (ISO 20022),

    • compatibility with public + private rails.

  5. Inspection-ready evidence

    • every critical action emits durable evidence:

      • who authorized what

      • under which authority

      • when

      • based on which identity/eligibility proof

      • with what rule version

$SIGN #SignDigitalSovereignInfra