Primitives for trust, verification, and privacy.

Veritas Acta builds open-source cryptographic infrastructure for anonymous credential verification, contestable public records, and privacy-preserving accountability.

Veritas Acta (open source, MIT)
│
│ Primitives
├── Acta ─────── contestable public record
├── verify ───── VOPRF verification primitive (npm: @veritasacta/verify)
│
│ Applications (built on the primitives)
└── attestation ─ proof-of-unique-device (verify with limit=1 + Ed25519 sig)

The BRASS protocol (Blind Rate-limiting with Anonymous Scope Separation) enables systems to count anonymous requests without learning who makes them. Tokens are issued blind, verified offline, and produce deterministic nullifiers bound to scope — not identity.

Acta provides a tamper-evident, append-only record where entries can be contested, superseded, and resolved — with anonymous but sybil-resistant authorship via BRASS tokens.

• No surveillance required — verify behaviour without tracking identity
• Offline verification — the issuer is never contacted at redemption
• Deterministic privacy — same token + same scope = same nullifier; different scope = unlinkable
• Pluggable storage — bring your own backend (KV, Redis, Durable Objects, in-memory)
• Audited dependencies — built on @noble/curves and @noble/hashes

npm install @veritasacta/verify

import { verify } from '@veritasacta/verify';

const result = await verify(token, context, config, store);
// { ok: true, nullifier: 'base64url...', remaining: 4 }

• Protocol specification
• Acta Charter
• npm package