broken-rs

A Rust toolkit for classical cryptanalysis and a few modern cryptographic attacks.

src/lib/ – the broken_rs library
- ciphers/ – implementations and breakers for Caesar, affine, Vigenère (IoC and n-gram based), autokey, simple/homophonic substitution and XOR ciphers
- statistics/ – fitness measures: chi-squared, index of coincidence, n-gram and word scoring
- tests/ – periodicity tests: Kasiski, Friedman and twist
- distinguishers/ – AES-128 4-round distinguisher
- collision_finder.rs – multithreaded search for hash values satisfying a predicate
- alphabet.rs, utils.rs – shared helpers
src/bin/ – command-line tools built on the library
examples/ – hash collision search examples (collision1–collision4)
ngrams/ – n-gram frequency tables for several languages (English, Danish, Finnish, French, German, Icelandic, Italian, Polish, Russian, Spanish, Swedish)
words/ – word frequency lists (English, Swedish)

Binaries

Name	Purpose
`break_caesar`	Break a Caesar cipher
`break_affine`	Break an affine cipher
`break_vigenere`	Break a Vigenère cipher
`break_vigenere_ngrams`	Break a Vigenère cipher using n-gram scoring
`break_autokey`	Break an autokey cipher
`break_simple_substitution`	Break a simple substitution cipher
`aes_4_rounds`	Run the AES 4-round distinguisher
`ngrams_score`	Score text against n-gram statistics
`kasiski`, `friedman`, `twist`	Estimate the key length of polyalphabetic ciphers

cargo build --release
cargo run --release --bin break_vigenere -- --help
cargo run --release --example collision1