LNQC logoLNQC

Post-Quantum
Cryptography
from first principles.

LNQC is a family of side-channel resistant, constant-time KEMs built on LPN hardness and LDPC error correction — from lightweight 256-bit to flagship 714-bit security.

Launch Interactive DemoRead the Whitepaper →

Live Encryption Comparison

Enter any message. See LNQC-256 (lightweight tier), SHA-256, and AES-256-GCM encrypt it — and compare quantum safety, payload size, and timing side by side.

$
🔬

Enter a message above and click Encrypt & Compare to begin.

Three Security Tiers

Choose Your Parameter Set

From lightweight IoT to uncompromising flagship security — all built on the same LPN+LDPC architecture.

LNQC-256
Lightweight
⚛
Dimensionn = 256
Secret128-bit
LDPC1024×128
Public Key64 KB
Ciphertext257 KB
Total Size
321 KB
🎯

IoT, embedded devices, bandwidth-constrained networks

LNQC-512
Balanced
⚛
Dimensionn = 512
Secret256-bit
LDPC2048×256
Public Key257 KB
Ciphertext1 MB
Total Size
1.3 MB
🎯

Enterprise applications, server-side, general purpose

LNQC-714
Flagship
⚛
Dimensionn = 714
Secret357-bit
LDPC2856×357
Public Key499 KB
Ciphertext2 MB
Total Size
2.4 MB
🎯

Maximum security, long-term storage, air-gapped systems

256-bit
AES Key Security
100%
Test Suite Pass Rate
NP-Hard
Security Foundation
0
Timing Side-Channels
Research-grade design choices

Built for the Post-Quantum Era

Each component is specified to reduce a targeted threat model, with implementations constrained for constant-time behavior.

⚛

Quantum Resistant

Built on the LPN (Learning Parity with Noise) problem — NP-Hard and immune to Shor's algorithm.

Spec: constant-time & side-channel aware
⏱

Constant-Time

All operations are uint8 binary matrix algebra with no branches — zero timing side-channels.

Spec: constant-time & side-channel aware
🔐

OS-Level Entropy

A dedicated crypto_rng seeded via Python's secrets module replaces the insecure NumPy global PRNG.

Spec: constant-time & side-channel aware
📡

LDPC Error Correction

A Gallager Bit-Flipping decoder absorbs LPN noise (per-tier weight 2 or 4) across all block sizes.

Spec: constant-time & side-channel aware
🔑

Tiered Security

Three parameter sets (256/512/714) let you trade key size against security margin — from IoT-friendly 257 KB to flagship 2 MB ciphertexts.

Spec: constant-time & side-channel aware
🧪

100% Verified

pytest runs 100 full-cycle encapsulation/decapsulation sequences asserting zero failures.

Spec: constant-time & side-channel aware

How We Stack Up

LNQC vs. NIST-standardized ML-KEM-768

MetricProject LNQCML-KEM-768
Security ModelLPN (NP-Hard)Module-LWE
Timing AttacksImmune (constant-time)Mitigated
Public Key Size257 KB – 500 KB~1.2 KB
Ciphertext Size257 KB – 2 MB~1.1 KB
ECC LayerLDPC GallagerNone
RNGOS CSPRNGOS CSPRNG

Dive Into the Math

Read the full technical whitepaper documenting the LPN foundation, CSPRNG hardening, and the LDPC bandwidth optimization.

Read the Whitepaper →
Author
Sami Mirqulaja profile

Sami Mirqulaja

Engineering Lead @Lanit

I build resilient Web3 infrastructure and lead engineering teams. My work spans backend systems, distributed consensus, and research into quantum-inspired randomness and pattern analysis.

Post-QuantumLPN/LDPCWASMConstant-TimeRust

LNQC is and always will be free and open-source. If this work advances your own research or projects, consider sponsoring continued exploration in post-quantum cryptography and quantum-resistant infrastructure.

© 2026 Project LNQC · LNQC (256/512/714) · v1.1.0