Enigma

This project implements a toy version of Enigma machine simulator in Python. The Enigma machine was a cipher device used primarily by Nazi Germany during World War II to protect military communication. This simulator allows you to encrypt and decrypt messages using a simplified version of the Enigma machine.

Features

• Encrypt messages with a specified wheel order and key.
• Decrypt messages with a specified wheel order and key.
• Handle spaces and non-alphabetic characters in messages.
• Command-line interface with history support.

Usage

Command-Line Interface

The CLI supports the following commands:

• a <cyphertext>: Decrypts the cyphertext without any hints (hardest mode).
• b <wheel> <cyphertext>: Decrypts the cyphertext with the wheel position given (hard mode).
• c <key> <cyphertext>: Decrypts the cyphertext with the key given (easy mode).
• d <wheel> <key> <cyphertext>: Decrypts the cyphertext with the wheel position and key given.
• e <wheel> <key> <plaintext>: Encrypts the plaintext with the wheel position and key given.
• h: Prints the help message.
• q: Quits the program.

Example

$ python3 script/main.py
Enigma interactive mode
usage: 
a: cyphertext (decrypt 6 * 37^2 times)
b: wheel cyphertext (decrypt 37^2 times)
c: key cyphertext (decrypt 6 times)
d: decrypt, wheel key cyphertext
e: encrypt, wheel key plaintext
h: print this help message
q: quit

Enigma> e abc key hello world
YI5A7 C7457

Enigma> d abc key yi5a7 c7457
HELLO WORLD

License

This project is licensed under the MIT License. See the LICENSE file for details.

Contributing

Contributions are welcome! Please open an issue or submit a pull request on GitHub.

Acknowledgements

This project is inspired by the historical Enigma machine used during World War II.