GCHQ Has Put Simulators for the Enigma, Typex, and Bombe on GitHub

GCHQ Has Put Simulators for the Enigma, Typex, and Bombe on GitHub

Let’s say that our message is as follows:

And that we’ve been told that a German service Enigma is in use with the following settings:

Rotors , , and , reflector , ring settings (Ringstellung in German) , plugboard (Steckerbrett) , and finally the rotors are set to . To avoid Enigma being a simple Caesar cipher, the rotors rotate (or “step”) between enciphering letters, changing the effective mappings. The German military Enigma adds a plugboard, which is a configurable pair mapping of letters (similar to the reflector, but not requiring that every letter is exchanged) applied before the first rotor (and thus also af

Source: github.com