# Enigma **Domain:** Cryptography / Computing History **Doc Type:** Machine **Maturity:** Developed **Related:** [[Bombe]], [[Alan Turing]], [[Cryptography]], [[Stateful Systems]], [[wiki/Bauhaus Architects of AI|Bauhaus Architects of AI]] ## Definition Enigma was a stateful polyalphabetic rotor cipher whose permutation changed after each keystroke and whose reflector made encryption reciprocal. ## Bauhaus Architects Context It was not self-referential. Its statefulness must not be confused with recursion or a system making statements about itself. ## Backlinks - [[wiki/Bauhaus Architects of AI|Bauhaus Architects of AI]] - [[articles/Bauhaus Architects of AI|Bauhaus Architects of AI]]