Over Enigma -

: Turing and his team at Bletchley Park developed the "Bombe," an electromechanical device designed to rapidly test and find the daily settings used by the Germans.

: While "puny" compared to modern RSA encryption , Enigma proved that mechanical logic could solve problems human brains could not. Over Enigma

The "magic" of the Enigma lived in its rotors and plugboards. Each time a key was pressed, the rotors turned, changing the electrical circuit and ensuring that typing the same letter twice would produce two different encrypted characters. With 150 quintillion possible settings , the odds of guessing the daily key were effectively zero. The Heroes of Bletchley Park : Turing and his team at Bletchley Park

(e.g., professional, conversational, gritty) the rotors turned