Enigma-Cracker

Enigma-Cracker is a cryptanaylsis tool for the Enigma machine

Features

Cryptanalysis:

• Crypt / decrypt messages
• Index of coincidence attacks
• N-grams attacks
• Known plaintext attack
• Turing's bombe
• Rejewski's attack
• Cribs finder using wordlists
• Ring settings recovery

Easy to use:

• Friendly CLI
• No external dependency
• Export / import configurations to save your work
• Misc commands to turn / roll back rotors, count letters...

Optimized:

• Use generators to reduce memory consumption
• Use multiprocessing to increase speed
• Compatible with PyPy to get incredibly fast results

Easy to extend:

• Customizable Enigma machines
• Add new attacks easily

How to use

Install

git clone https://github.com/Petitoto/Enigma-Cracker
cd Enigma-Cracker
python3 enigma-cracker.py

Basic use

Use help or help <command> to get help

Global parameters are called attributes:

Enigma-Cracker > help attributes

        Attributes:
            text: text to encrypt, decrypt, or attack
            configs: Enigma configurations to encrypt, decrypt, or attack the text
            process: number of processes to launch attacks (default: 1)

        NB: multi processing prevents storing configurations as generators

Main idea behind Enigma's cryptanalysis:

• generate a lot of possible configurations
• use attacks to filter configurations
• repeat attacks until the correct configuration is the only one left
• some attacks allow separate computing of rotors, plugboard and ring settings

Demo

Help

Index of coincidence to filter random configurations

1-demo-ic.mp4

Turing's bombe and crib to recover rotors configuration and partial plugboard settings

2-demo-turing.mp4

Index of coincidence to recover more plugs

3-demo-plugs.mp4

Recover ring settings

4-demo-ring.mp4