Code

Classical cipher cryptanalysis toolkit -- Break historical ciphers with statistical attacks.

> Lancer l'application

• Vigenere Cipher -- Kasiski examination, index of coincidence
• Beaufort Cipher -- Reciprocal cipher analysis
• Caesar Cipher -- Frequency analysis, brute force
• XOR Cipher -- Known plaintext, crib dragging
• Base64 -- Encoding/decoding utilities
• Dictionary Validation -- Verify plaintext against word lists
• Web Workers -- Background processing for large texts

• Pure HTML/CSS/JavaScript
• Web Workers for parallel computation
• Frequency analysis algorithms
• No external dependencies

1. Open `index.html` in your browser
2. Paste your ciphertext
3. Select the suspected cipher type
4. Click Analyze to run attacks
5. Review candidate plaintexts

• Frequency Analysis -- Letter distribution comparison
• Index of Coincidence -- Key length estimation
• Kasiski Examination -- Repeated sequence analysis
• Dictionary Attack -- Plaintext validation
• Chi-squared Test -- Statistical fitness

MIT

Eric PERRET -- GitHub