Enigma, the Bombe, and Typex

Enigma, the Bombe, and Typex

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