PQC & QRNG — Post-Quantum Cryptography and Quantum Randomness

PQC — Post-Quantum Cryptography

QCOS implements NIST-standardised post-quantum signatures (ML-DSA, FIPS 204, via liboqs; the legacy dilithium* spellings are accepted as aliases and map to ML-DSA) to protect against quantum attacks on classical cryptography.

Generate a PQC key pair

curl -X POST https://api.softquantus.com/api/v1/pqc/keypair \
  -H "Authorization: Bearer sq-live-your-key" \
  -H "Content-Type: application/json" \
  -d '{"algorithm": "ml-dsa-65"}'

Response:

{
  "algorithm": "ml-dsa-65",
  "mechanism": "ML-DSA-65",
  "is_post_quantum": true,
  "public_key": "base64...",
  "private_key": "base64...",
  "key_id": "pqc_key_abc123"
}

The private key is returned once and never stored server-side — QCOS holds no key store. Keep it if you intend to sign.

Sign data

You supply the private key from /pqc/keypair — the server signs and keeps nothing:

curl -X POST https://api.softquantus.com/api/v1/pqc/sign \
  -H "Authorization: Bearer sq-live-your-key" \
  -H "Content-Type: application/json" \
  -d '{
    "message": "base64_encoded_data",
    "private_key": "base64...",
    "algorithm": "ml-dsa-65",
    "key_id": "pqc_key_abc123"
  }'

Verify signature

curl -X POST https://api.softquantus.com/api/v1/pqc/verify \
  -H "Authorization: Bearer sq-live-your-key" \
  -H "Content-Type: application/json" \
  -d '{
    "message": "base64_encoded_data",
    "signature": "base64_signature",
    "public_key": "base64...",
    "algorithm": "ML-DSA-65"
  }'

QRNG — Quantum Random Number Generator

QRNG generates cryptographically secure random numbers using quantum entropy. Falls back to hybrid CSPRNG when QPU is unavailable.

Generate random bytes

curl -X POST https://api.softquantus.com/api/v1/qrng/bytes \
  -H "Authorization: Bearer sq-live-your-key" \
  -H "Content-Type: application/json" \
  -d '{"n_bytes": 32}'

Response:

{
  "data": "a3f8c2...",
  "n_bytes": 32,
  "source": "quantum",
  "entropy_bits": 256
}

Generate a quantum UUID

curl https://api.softquantus.com/api/v1/qrng/uuid \
  -H "Authorization: Bearer sq-live-your-key"

Generate a nonce (anti-spoofing)

curl https://api.softquantus.com/api/v1/qrng/nonce \
  -H "Authorization: Bearer sq-live-your-key"

Use cases

Use case	Module	Why quantum
Secure key generation	QRNG	True randomness, not pseudorandom
API token generation	QRNG	Unpredictable by design
Evidence bundle signing	PQC	Quantum-safe signatures
Quantum-safe TLS	PQC	Protection against future Shor attacks
GPS anti-spoofing nonces	QRNG	Unpredictable challenge tokens

Core

Modules

Certification

PQC & QRNG — Quantum Security

PQC & QRNG — Post-Quantum Cryptography and Quantum Randomness

PQC — Post-Quantum Cryptography

Generate a PQC key pair

Sign data

Verify signature

QRNG — Quantum Random Number Generator

Generate random bytes

Generate a quantum UUID

Generate a nonce (anti-spoofing)

Use cases

​PQC & QRNG — Post-Quantum Cryptography and Quantum Randomness

​PQC — Post-Quantum Cryptography

​Generate a PQC key pair

​Sign data

​Verify signature

​QRNG — Quantum Random Number Generator

​Generate random bytes

​Generate a quantum UUID

​Generate a nonce (anti-spoofing)

​Use cases

PQC & QRNG — Post-Quantum Cryptography and Quantum Randomness

PQC — Post-Quantum Cryptography

Generate a PQC key pair

Sign data

Verify signature

QRNG — Quantum Random Number Generator

Generate random bytes

Generate a quantum UUID

Generate a nonce (anti-spoofing)

Use cases