Post-quantum E2E encryption in 10 lines.

A drop-in SDK that replaces quantum-vulnerable ECDH key exchange with ML-KEM-768 (NIST FIPS 203). Every message is AES-256-GCM encrypted with quantum-seeded IVs (simulated by default; real hardware on request) and ECDSA-signed.

Get Your API KeyWhy It Matters

Harvest now, decrypt later

Today
Attacker records
Encrypted traffic on Signal, WhatsApp & custom apps is captured and stored
→
Soon
Quantum computer
Breaks the ECDH / RSA key exchange those messages relied on
→
With ML-KEM
Still sealed
ML-KEM-768 key exchange is immune — recorded traffic stays unreadable

Messages you send today are recorded today. Post-quantum key exchange protects them before the hardware arrives.

Quickstart — encrypt a message in 10 lines

# pip install quantum-messenger from quantum_messenger import QuantumMessengerClient async with QuantumMessengerClient(api_key="qm_…") as client: alice = await client.create_identity("alice", "Alice") bob = await client.create_identity("bob", "Bob") session = await client.establish_session(alice["identity_id"], bob["identity_id"]) await client.send_message(session["session_id"], alice["identity_id"], "Hello!") messages = await client.get_messages(session["session_id"])

SDKs for Python, JavaScript, and Swift — the same post-quantum session under each.

What's under the hood

ML-KEM-768 key exchange

Post-quantum key encapsulation (NIST FIPS 203) replaces X25519 ECDH — immune to harvest-now-decrypt-later.

AES-256-GCM messages

Every message encrypted with a quantum-seeded IV and authenticated — tamper-evident by construction.

One-time prekeys

Forward secrecy through single-use prekey bundles, so a compromised key can't unlock past messages.

Fingerprint verification

ECDSA-signed identities with verifiable fingerprints, so peers can confirm who they're really talking to.

Drop-in replacement for the Signal-style stack

Same shape as the protocols you know — identities, sessions, prekeys — with the quantum-vulnerable ECDH swapped for ML-KEM-768. Built to support HIPAA and FINRA E2E requirements. Python, JavaScript, and Swift SDKs, MIT-licensed.

ML-KEM-768 (FIPS 203) · AES-256-GCM · ECDSA · forward secrecy

Pricing

Free
$0
  • Up to 100 identities
  • 1,000 messages / day
  • AES-256-GCM E2E encryption
Get Started
Starter
$29/mo
  • Up to 10,000 identities
  • 100,000 messages / day
  • ML-KEM-768 post-quantum
  • Quantum-random key rotation
Start Free Trial
Enterprise
$299/mo
  • Unlimited identities + volume
  • SSO & advanced security
  • Dedicated support
  • SLA
Contact Sales

Post-quantum ML-KEM-768 activates on Starter and above (Free uses AES-256-GCM). Dollar prices shown are proposed — confirm before launch.

QNTYX
quantumrand.dev →