• Description
• Program Requirements and Installation
• Get Started
• Author

This is a simple Python app that simulates Enigma M3 encryption. The rotors can be chosen from type I, II, and III. The reflector used is type B (UKW-B). The wiring and notch used in each rotor type are referenced from here

• Python 3.9 or Above

  % sudo apt install python3
  

• PyQt5

  % pip install PyQt5
  

1. Start the program

   % python src/App.py
   

2. Configure each rotor's type, Position, and Ring.
3. Configure the plugboard (the bottom one) by clicking the letter in pairs. The same color represents the switched pair. To unplug, re-click the letter.
4. The text can be inputted through keyboard button (the middle one), keyboard press, or by clicking the Edit button in either Plain Text or Cipher Text text fields (click Encrypt or Decrypt afterward).
5. After each keyboard click/press the letter in lampboard will light up. The encrypted text will also be displayed on the Cipher Text text field (or in Plain Text if you clicked Decrypt)
6. Each encryption step will be displayed on the right side.
7. Click Clear to clear Plain Text, Cipher Text, and the encryption step.

Note: if you clicked delete or backspace key on your keyboard, for each click, the text in Plain Text and Cipher Text will be deleted by one letter. Some of the steps will also be deleted. Rotor 1 will also be returned one step. Note that the returned rotor is limited to rotor 1, hence this method will not work for all condition.

Puti Nabilla Aidira (13521088)