Post-Quantum Cryptography API Dilithium3 signing. Kyber768 encryption. One API call.

NIST-standardized quantum-resistant cryptography as a service. No crypto libraries to install. No key management. Sub-100μs signing on commodity hardware.

NIST-Standardized Sub-100μs Signing Managed Keys Zero-Exposure Signing

Try It Live Get Free API Key View Docs

Why PQCaaS

Quantum-ready cryptography without the complexity.

Quantum-Ready

Core

NIST-standardized algorithms (ML-DSA, ML-KEM). Drop-in protection before Q-Day.

Dilithium3 digital signatures
Kyber768 key encapsulation
AES-256-GCM hybrid encryption
Hybrid Noise XX handshakes

Zero Setup

Simple

No crypto libraries. No key management. Sign, encrypt, and verify in one HTTP call.

One POST request to sign
One POST request to encrypt
Base64 in, base64 out
Python SDK available

Managed Keys

Secure

Private keys never leave the server. We handle generation, storage, and rotation.

Auto-generated key pairs on signup
Server-side key storage
One-click key rotation
Public key export for verification

Zero-Exposure Signing

New

Sign data without exposing plaintext to the API. Client-side hashing — we only see a 32-byte digest, never your content.

Client hashes locally (SHAKE-256)
API signs the digest, not your data
HIPAA, PCI, GDPR friendly
Send 32 bytes instead of 10MB

Try It

Sign a message in one API call.

bash

# Sign a document
curl -X POST https://pq-api.cyclecore.ai/v1/sign \
  -H "X-API-Key: pq_live_YOUR_KEY" \
  -H "Content-Type: application/json" \
  -d '{"message": "aGVsbG8gd29ybGQ="}'

# Response
{
  "signature": "MIIFkj...",
  "public_key": "a3f2c1...",
  "latency_us": 1842.5
}

python

from cyclecore_pq import CycleCoreClient

client = CycleCoreClient("pq_live_YOUR_KEY")
result = client.sign(b"hello world")
print(result.valid)  # True

python — Zero-Exposure Signing

from cyclecore_pq import CycleCoreClient, zes_sign, zes_verify

client = CycleCoreClient("pq_live_YOUR_KEY")

# Your data is hashed locally — the API never sees it
result = zes_sign(client, b"patient record, financial tx, anything sensitive")
print(result.signature[:40])  # Dilithium3 signature of the digest

# Verify (also hashes locally before checking)
verified = zes_verify(client, b"patient record, financial tx, anything sensitive", result.signature_bytes)
print(verified.valid)  # True — and CycleCore never saw your data

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Use Cases

Crypto & DeFi

Post-quantum wallet signing. Zero-Exposure Signing lets you sign transaction digests without exposing full tx data. Quantum-proof from day one.

Healthcare & Compliance

Attestation chains for tamper-evident audit logs. Use Zero-Exposure Signing to sign HIPAA records without sending PII to a third party. Quantum-resistant audit trails for regulatory review.

Financial Services

Encrypt sensitive data with Kyber768. NIST-standardized, no algorithm migration needed. Ready for post-quantum compliance requirements.

IoT & Supply Chain

Batch signing for device attestation — up to 1,000 signatures per call. Low-latency security for real-time systems.

Secure Messaging

Hybrid Noise XX handshake for post-quantum key exchange between parties. Forward secrecy with quantum-resistant algorithms.