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py-cipher

A few common tools for classical cipher cracking, implemented in Python 3 and C. Uses fogleman's TWL06

Prerequisites

• Python 3 interpeter
• C compiler

Setting up

• Compile the C library (example with gcc):

$ gcc -Ofast -fPIC -shared -o src/libhill.so src/hillmodule.c

• Run the graphical interface:

$ python3 main.py

Supported ciphers

• Affine ciphers (which includes Caesar shifts and Atbash ciphers)
• All monoalphabetic ciphers as long as the word spacing is consistent with the plaintext
• Vigenere ciphers - including vigenere on top of a monoalphabetic cipher
• Hill ciphers with matrix size up to 4x4