Overview
Sovereign-grade digital infrastructure for national systems of money, identity, and capital.
S.I.G.N. (Sovereign Infrastructure for Global Nations) is sovereign-grade digital infrastructure that governments and regulated institutions can reuse across three national systems:
New Money System — CBDC + regulated stablecoins on one national rail (public + private modes), with policy-grade controls and supervisory visibility.
New ID System — national identity + verifiable credentials (VC/DID) with selective disclosure, offline verification, and strong issuer governance.
New Capital System — programmable distribution + regulated real-world asset (RWA) tokenization with compliance controls and inspection-ready reporting.
Why this documentation exists
Most national digital programs fail at scale due to fragmented foundations:
identity and eligibility checks are duplicated across agencies and vendors,
payments rails are opaque and hard to audit,
distribution programs lack end-to-end evidence,
on-chain and off-chain systems cannot be reconciled cleanly over time.
S.I.G.N. is designed as a thin but critical infrastructure layer where:
GovTech execution,
FinTech rails, and
cryptographic verification meet in a way that keeps policy + oversight under sovereign control.
Who this is for
Governments, central banks, regulators
You want a system that is:
private to the public but auditable to lawful authorities,
operable at national concurrency (millions of users, multi-operator),
standards-aware (ISO 20022, W3C VC/DID),
and deployable without vendor lock-in.
Start here:
Builders and integrators
You want to integrate identity proofs, program rules, distribution, and audit evidence into real systems.
Start here:
How the docs are organized
S.I.G.N. (this section): system-level architecture, governance, security/privacy.
Use Cases: New Money / New ID / New Capital.
Products: EthSign, TokenTable, Sign Protocol (evidence layer).
For Builders: deep developer docs (primarily Sign Protocol contracts/SDK/APIs).
Core concepts (minimal glossary)
This repo already contains a full glossary; this is the “minimum set” to read the S.I.G.N. pages:
Credential (VC): cryptographically signed claim issued to a holder (citizen/business).
DID: a decentralized identifier used to represent issuers, holders, and verifiers.
Attestation: structured, verifiable data record anchored and queryable (the evidence layer).
Schema: a template defining the structure of attestations/claims.
Trust Registry: registry of authorized issuers + keys + schemas + revocation/status.
Evidence artifact: a durable, inspectable record of critical actions (who verified what, when, under what authority).
See full definitions: Glossary
The “stack at a glance”
A simplified mental model:
Settlement / Ledger substrate
public chain mode (transparent)
private chain mode (confidential)
Trust & Evidence layer
identity credentials, attestations, revocation/status, audit hashes
Program execution
payments, distribution, registries, approvals, reporting
S.I.G.N. is the system that makes these layers interoperable and operable at national scale.
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