Arca overview
Arca is an open-source post-quantum hardware signer.
- CPU: open RISC-V MCU.
- BOM: USD 22–28.
- Signing primitive: ML-DSA-65 (FIPS 204) on-device.
- PIN protection: Argon2id (RFC 9106).
- Entropy: TRNG audited against NIST SP 800-90B (startup + continuous health tests).
- Communication: QR codes only — no radio, no USB data, no Bluetooth.
- Licensing: firmware Apache-2.0; schematics, gerbers, BOM under CERN-OHL-S v2.
An NLnet NGI0 Core grant application (EUR 50,000) funds the reference firmware implementation and the first audited prototype run.