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Quantum-Secure Encryption
for the Post-Quantum Era

Defense-in-depth cryptography with NIST-approved algorithms. Hybrid KEM, dual signatures, cascading encryption—built in Rust for memory safety.
NIST FIPS 203/204/205Open SourceRust-Powered

Why Now?

The quantum computing threat isn't hypothetical—it's already happening.

"Harvest Now, Decrypt Later"

Nation-state actors are actively collecting encrypted data today, storing it until quantum computers can break current encryption. Your RSA and ECC-encrypted data from 2024 could be readable by 2035.

The Timeline

2024NIST finalizes PQC standards
2025-2030Migration window
2030-2035Cryptographically relevant QC

If your data needs to remain confidential for 10+ years, you need post-quantum cryptography today.

Defense-in-Depth Architecture

Multiple layers of quantum-resistant algorithms working together. Even if one is compromised, your data remains secure.

FIPS 203

Hybrid KEM

X25519 + ML-KEM-768

Combines classical Elliptic Curve Diffie-Hellman with lattice-based ML-KEM for quantum-resistant key encapsulation. Security remains even if one algorithm is broken.

FIPS 204/205

Dual Signatures

ML-DSA-65 + SLH-DSA

Lattice-based ML-DSA paired with hash-based SLH-DSA provides cryptographic diversity. Two mathematically independent signature schemes for maximum assurance.

Defense-in-Depth

Cascading Encryption

AES-256-GCM + ChaCha20-Poly1305

Data encrypted with AES-256-GCM is re-encrypted with ChaCha20-Poly1305. An attacker must break both NIST and IETF approved ciphers.

Rust-Powered

Memory Safety

Rust + Zeroization

Written in Rust with automatic memory zeroization. Secrets are scrubbed from memory immediately after use, preventing memory-based attacks.

SHA3-512

Key Derivation

HKDF-SHA3-512

Derives cryptographic keys using HKDF with SHA3-512. Domain separation ensures keys for different purposes are cryptographically isolated.

PFS

Forward Secrecy

Built-in Key Rotation

Ephemeral keys and automatic rotation ensure past communications remain secure even if long-term keys are compromised in the future.

Simple API, Powerful Protection

Quantum-secure cryptography shouldn't be complicated. A clean Rust API abstracts the complexity while maintaining maximum security.

main.rs
1use quantum_shield::{QShieldKEM, QuantumShield};
2
3// Generate quantum-secure key pair
4let (public_key, secret_key) = QShieldKEM::generate_keypair()?;
5
6// Encapsulate shared secret (X25519 + ML-KEM-768)
7let (ciphertext, shared_secret) = QShieldKEM::encapsulate(&public_key)?;
8
9// Cascading encryption (AES-256-GCM + ChaCha20-Poly1305)
10let cipher = QuantumShield::new(&shared_secret)?;
11let encrypted = cipher.encrypt(b"Quantum-secure message")?;
12
13// Decrypt on the other side
14let decrypted = cipher.decrypt(&encrypted)?;

Algorithm Stack

ML-KEM-768FIPS 203ML-DSA-65FIPS 204SLH-DSAFIPS 205X25519RFC 7748AES-256-GCMNISTChaCha20-Poly1305IETFHKDF-SHA3-512RFC 5869

Security Properties

  • Quantum-resistant key exchange & signatures
  • Perfect forward secrecy
  • Constant-time operations (side-channel resistant)
  • Automatic memory zeroization
  • Domain-separated key derivation

Built for Critical Infrastructure

Industries where data confidentiality must be maintained for decades, not years.

Healthcare / HIPAA

Protect patient records and PHI with encryption that will remain secure for decades. Meet HIPAA requirements today while preparing for quantum threats.

Financial Services

Secure transactions, account data, and financial records. Regulatory compliance requires forward-looking security—QuantumShield delivers.

Government & Defense

Classified communications and sensitive government data require the highest security standards. NIST-approved algorithms for national security.

Long-term Archives

Data that must remain confidential for 50+ years—legal documents, intellectual property, research data. Quantum-safe encryption from day one.

Why QuantumShield?

Built with the latest NIST-approved post-quantum algorithms for maximum security.

Key Features

  • NIST-approved algorithms: Uses fips203 (ML-KEM-768) pure-Rust implementation
  • Hybrid approach: X25519 + ML-KEM-768 for defense-in-depth
  • Battle-tested primitives: AES-GCM, ChaCha20-Poly1305, Argon2id from audited crates
  • Memory safe: Written in Rust with automatic memory zeroization
  • Open source: Fully auditable code under MIT license
NEW

QAuth

Post-Quantum Authentication Protocol

Built on QuantumShield's crypto primitives, QAuth replaces OAuth 2.0 and JWT with dual signatures (Ed25519 + ML-DSA-65), encrypted payloads, mandatory proof-of-possession, and built-in revocation. The authentication protocol for the quantum era.

Explore QAuthTry Demo

Open Source & MIT Licensed

QuantumShield is fully open source. Audit the code, contribute improvements, report security issues, or learn from the implementation.

Try Live DemoView on GitHub

Get Early Access

Be the first to access Python, WebAssembly, and Node.js SDKs. Join developers preparing their systems for the quantum era.