An implementation of the Enigma machine in Python.
Project description
Enigma Simulator
An implementation of the Enigma machine in Python. Simulates a common 3-rotor machine with the common 8 rotors and 3 reflectors. Wikipedia has a good overview. Project inspired by this video.
The transformation of each letter is implemented as a product of permutations (Rejewski, 1980), in this case 26x26 matrices. The transform, in this formulation, can therefore be expressed as (from Wikipedia):
Can be used to encrypt/decrypt messages ('X' was used to replace spaces):
from enigma import Enigma
# Encrypting
enigma1 = Enigma(["I", "II", "III"], [0, 0, 0], [0, 0, 0], "B", "AD")
enigma1.encrypt("HELLOXWORLD") # Returns "ILBADSQQAPK"
# Decrypting
enigma2 = Enigma(["I", "II", "III"], [0, 0, 0], [0, 0, 0], "B", "AD")
enigma2.encrypt("ILBADSQQAPK") # Returns "HELLOXWORLD" back
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