linear-cryptanalysis

Automated cryptanalysis of substitution permutation network cipher

This repo is a collection of proof-of-concepts, examples, essays and experiments in cryptography, cryptanalysis, steganography and covert channels that I originally wrote in 2015.

This is a library that tries to break SPN ciphers in an fully automatic manner.

my solutions for the HW in the symmetric cipher breaking course, all the HW are exercises from the https://cryptanex.hideinplainsight.io/ website

Учебно-исследовательский блочный шифр: блок 96 бит, ключ 256 бит, сеть Фейстеля, ARX. Реализации на Python и C, 8 тестовых наборов, 9 скриптов криптоанализа. Независимо не проверялся — не для реальных данных.

[French] Projet de cryptanalyse [English] Linear cryptanalysis

32-bit SPN linear cryptanalysis — 2026 全国密码数学挑战赛赛题三 (Method 1 exact + Method 2 LAT/piling-up approximation, 318/346 valid, score 2996.53)

dedicated tools supporting automated evaluation are in urgent demand. The Block Cipher Design and Analysis Platform is built to address this pain point. Integrating design, testing, analysis and teaching functions, it provides solid technical support for security verification throughout the entire lifecycle of cryptographic algorithms.

CRYPTO - Linear Cryptanalysis of Reduced-Round Speck with a Heuristic Approach: Automatic Search for Linear Trails

Browser-based demo of linear cryptanalysis — Matsui's 1993 attack that broke DES from known plaintext alone. Linear approximation table, the piling-up lemma compounding biases across rounds, and a live Algorithm 2 key recovery against a toy SPN.