Built on public, peer-reviewed standards. No security through obscurity. Every algorithm is independently verifiable.
"A cryptosystem should be secure even if everything about the system, except the key, is public knowledge."
Quantum computers cost billions. You won't own one. But nation-states, intelligence agencies, and well-funded adversaries already do. They're not waiting for you to catch up.
QNSQY exists to close this gap. Quantum-resistant encryption that runs on your existing hardware. No billion-dollar lab required. Protection against threats most people don't even know exist yet.
Factors integers in polynomial time. RSA-2048 cracked in hours, not billions of years.
Quadratic speedup on search. AES-256 becomes AES-128 equivalent. Still secure.
Classical computing hit a wall. Quantum is climbing over it. The attackers aren't waiting. Neither should you.
QNSQY uses a defense-in-depth architecture with hybrid cryptography. Both post-quantum and classical algorithms must be broken to compromise your files.
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Attacker must break BOTH algorithms to decrypt
Breaks X25519 instantly. But ML-KEM remains secure. Your files stay protected.
Cryptanalysis discovers weakness. X25519 still protects. No silent failure.
Double protection. Defense in depth. The gold standard for post-quantum migration.
QNSQY uses only public, peer-reviewed cryptographic standards. These algorithms have been scrutinized by the global security community and adopted by governments, enterprises, and security-conscious organizations worldwide.
Winner of the Password Hashing Competition. OWASP recommended. Memory-hard design defeats GPU and ASIC attacks.
Industry standard authenticated encryption. Hardware-accelerated on modern CPUs. 256-bit keys for maximum security.
All tiers. Extended nonces. Excellent performance without AES hardware. Used by WireGuard, Signal.
AND construction: attacker must break BOTH. All tiers use hybrid: Free/Pro=ML-KEM-768 + X25519, Enterprise=ML-KEM-1024 + X25519. NIST FIPS 203.
Enterprise only. AND construction: both ML-DSA (FIPS 204) + Ed25519 must verify. Defense in depth.
Pro/Enterprise. NIST FIPS 205. Alternative PQ signature scheme with different security assumptions.
Modern cryptographic hash. Faster than SHA-256. Merkle tree structure enables streaming and partial verification.
"A cryptosystem should be secure even if everything about the system, except the key, is public knowledge."Kerckhoffs's Principle Cryptography 101 — Auguste Kerckhoffs, 1883
This is why we publish our architecture openly. Security through obscurity is not security. Every algorithm we use is a public, peer-reviewed standard.
All tiers use hybrid KEM (ML-KEM + X25519) with AES-256-GCM symmetric encryption. Enterprise adds hybrid signatures (ML-DSA + Ed25519). AND construction ensures attacker must break BOTH algorithms. All NIST standardized (FIPS 203/204/205).
Every file encryption generates unique ephemeral keys. Even if an attacker compromises one file's encryption key, they cannot decrypt other files. Past encryptions remain secure.
AES-256-GCM and XChaCha20-Poly1305 provide both confidentiality and integrity. If anyone modifies an encrypted file — even a single bit — decryption will fail. No silent corruption.
Argon2id requires significant memory to compute. This makes password cracking with GPUs and ASICs extremely expensive. A weak password becomes much harder to brute-force.
QNSQY never sees your password, your files, or your keys. Everything happens locally on your device. There's no server to hack, no cloud to breach, no third party to subpoena.
On Linux CLI, kernel-level network blocking via seccomp-bpf ensures the application cannot connect to the internet. No phone home, no remote exploitation.
Platform Note: macOS uses deprecated sandbox_init() API (may not be enforced). Windows has no kernel-level network blocking—physically disconnect from network for air-gapped security. GUI versions cannot block network (require sockets for display).
QNSQY is designed to protect against these specific threats:
Adversaries collecting encrypted data today to decrypt with future quantum computers.
Password guessing using GPUs, ASICs, or cloud computing resources.
Modification of encrypted files, whether accidental or malicious.
We don't use cloud services. There's nothing for providers to access.
We have nothing to turn over. Your data never leaves your device.
seccomp-bpf blocks all network syscalls on Linux CLI. Windows/macOS: manually disconnect network.
Every algorithm we use is publicly documented. NIST publications, IETF RFCs, academic papers. You can verify our claims against the official specifications.
All releases are cryptographically signed. Verify the signature before running. SHA-256 checksums provided for every download.
Found a vulnerability? Report it to security@quantumsequrity.com. We take responsible disclosure seriously and will work with you to address issues.
Full changelog with every release. Know exactly what changed. No silent updates. You control when and if you upgrade.
For those who want to verify our cryptographic claims, here are the official specifications:
We're happy to discuss our approach. Contact our security team.