QUANTUM-RESISTANT ENCRYPTION

Encryption that protects your data from Quantum Computers

Your files. Protected forever. Even when quantum computers break today's encryption.

Download Free How It Works
FIPS 203/204/205 NIST Compliant*
Air-Gapped* Linux Only
Open Standards NIST Algorithms
qnsqy
$
ML-KEM + X25519
·
ML-DSA + Ed25519
·
SLH-DSA
·
AES-256-GCM
·
Argon2id
·
BLAKE3
·
Windows
·
macOS
·
Linux
NIST FIPS 203/204/205 ALGORITHMS
HYBRID DEFENSE-IN-DEPTH
AIR-GAPPED (LINUX)
ZERO DATA COLLECTION
Name QuaNtum SeQuritY
·
Command qnsqy
·
Extension .qs
01

The threat is already here

Nation-state actors are harvesting encrypted data today, waiting for quantum computers to break it tomorrow.

This is called Harvest Now, Decrypt Later.

Medical records. Legal documents. Financial data. Trade secrets. Everything encrypted with RSA or ECDH today becomes readable once quantum computers arrive.

Your sensitive files need protection that lasts decades, not years.

2024 HARVESTING
203X Q-DAY

Q-Day: The moment a cryptographically-relevant quantum computer becomes operational. Most estimates place it within the next 10-15 years.

02

The solution is simple

A

Quantum-Resistant

Built on NIST-approved post-quantum standards (FIPS 203, 204, 205). Not experimental. Production-ready encryption with AES-256-GCM. All tiers include hybrid ML-KEM + X25519 key encapsulation for quantum resistance.

B

Air-Gapped by Design

Zero network capability. Works completely offline. Your data never leaves your device. No cloud. No telemetry. No tracking.

C

Zero-Knowledge Architecture

No accounts. No registration. No cloud storage. We never see your passwords, your files, or your encryption keys. Everything happens locally.

D

Memory-Hard Key Derivation

Uses Argon2id (OWASP recommended) for password hashing. Brute-force attacks become computationally impractical.

E

Authenticated Encryption

AES-256-GCM ensures both confidentiality and integrity. Any tampering is detected immediately upon decryption.

F

Forward Secrecy

Unique file keys for every encryption operation. Compromising one file doesn't compromise others.

03

How it works

01

Select

Choose any file on your system. Documents, images, archives — any format works.

02

Encrypt

One command. Enter your password. QNSQY handles the rest with quantum-safe algorithms.

03

Store

Your encrypted .qs file is safe from both classical and quantum attacks.

04

Decrypt

When you need access, decrypt with your password. Integrity verified automatically.

04

Built for those who need it most

01

Legal Professionals

Client confidentiality with decades-long retention requirements

02

Healthcare

HIPAA compliance and patient record protection

03

Finance

Regulatory compliance and trade secret protection

04

Journalists

Source protection and confidential communications

05

Researchers

Intellectual property and grant data security

06

Personal Users

Family documents, passwords, private memories

07

Activists & NGOs

Human rights documentation, sensitive field data

08

Government Contractors

Export-controlled data, defense-adjacent work

05

Built on open standards

Public, peer-reviewed cryptographic standards. No security through obscurity. No proprietary algorithms.

Password Hashing

Argon2id

OWASP recommended, memory-hard

Symmetric Encryption

AES-256-GCM

XChaCha20-Poly1305 also available

Hybrid KEM

ML-KEM + X25519

Post-quantum + classical (AND construction)

Hybrid Signatures

ML-DSA + Ed25519

FIPS 204 + classical defense-in-depth

Hash-Based Signatures

SLH-DSA

FIPS 205 (Pro/Enterprise)

Network Access

None

Air-gapped by design

Memory-hard password hashing Authenticated encryption Forward secrecy Tamper detection No telemetry
Full Security Details
06

One price. Forever.

Free
qnsqy
$0
Forever. No subscription.
  • Hybrid ML-KEM-768 + X25519
  • AES-256-GCM encryption
  • 1 GB file limit
  • Encrypt / Decrypt / Shred
  • Compression support
  • Personal use license
Download Free
RECOMMENDED
Pro
qnsqy
$49
One-time purchase. Lifetime license.
  • Everything in Free
  • 10 GB file limit
  • ML-KEM-1024 option (NIST Level 5)
  • SLH-DSA hash-based signatures
  • Key management & audit logging
  • Batch operations
  • Commercial license
Get Pro
Enterprise
qnsqy
$199
Per user. Perpetual license.
  • Everything in Pro
  • Unlimited file size
  • Hybrid signatures (ML-DSA + Ed25519)
  • Password change (rekey)
  • Custom Argon2 parameters
  • Full algorithm selection
  • Priority support
Contact Sales
Full Feature Comparison
07

Quick start

Encrypt a file

# Encrypt (prompts for password)
$ qnsqy-free encrypt -i secret.pdf
# Output: secret.pdf.qs

# Encrypt with compression
$ qnsqy-free encrypt -i largefile.tar -z
# Output: largefile.tar.qs (compressed)

Decrypt a file

# Decrypt (prompts for password)
$ qnsqy-free decrypt -i secret.pdf.qs
# Output: secret.pdf (original restored)

Securely delete original

# 3-pass secure delete
$ qnsqy-free shred secret.pdf
# File overwritten and deleted
Full Documentation
08

Why QNSQY?

Feature QNSQY 7-Zip GPG VeraCrypt
Post-quantum safe Yes No No No
Memory-hard KDF Argon2id PBKDF2 S2K PBKDF2
Large file streaming Yes Limited No Yes
Authenticated encryption Yes Yes Yes Yes
Digital signatures ML-DSA No RSA/ECDSA No
Air-gapped / Offline Always Yes Yes Yes
Full Comparison
09

Common questions

Quantum-safe encryption uses algorithms designed to resist attacks from both classical and quantum computers. QNSQY uses a hybrid approach combining post-quantum (ML-KEM, ML-DSA, SLH-DSA) with classical algorithms (X25519, Ed25519) using AND construction — attackers must break BOTH to succeed. This provides defense-in-depth against both quantum and classical threats. All algorithms are NIST-standardized (FIPS 203/204/205).
Your files cannot be recovered. This is by design. QNSQY uses zero-knowledge architecture — we never see your password and have no way to recover encrypted files. We recommend keeping secure backups of critical passwords. Enterprise users have optional key escrow features for organizational recovery scenarios.
For quantum resistance, yes. 7-Zip and GPG use traditional cryptography that quantum computers will eventually break. QNSQY specifically addresses this threat with NIST-approved post-quantum algorithms. Additionally, QNSQY uses Argon2id for key derivation (more resistant to brute-force than the older algorithms used by 7-Zip and GPG) and provides authenticated encryption with tamper detection by default.
Yes, completely. QNSQY has zero network capability by design. All encryption and decryption happens locally on your device. No internet connection is required, no data is sent anywhere, and no telemetry is collected. This air-gapped design ensures your files never leave your control.
QNSQY is available for Windows (x64), macOS (Intel and Apple Silicon), and Linux (x64, ARM64). Pre-built binaries are provided for all platforms. Package manager support and additional platforms are coming soon.
All Questions

Your data belongs to you.

Not your cloud provider. Not your government. Not us. Take control with quantum-safe encryption.

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