where dead technologies go Some photos taken at the Technology Museum in Munich. The ENIGMA One of the first crypto machine. An Enigma machine is any of a family of related electro-mechanical rotor machines used for the encryption and decryption of secret messages. The first Enigma was invented by German engineer Arthur Scherbius at the end of World War I. This model and its variants were used commercially from the early 1920s, and adopted by military and government services of several countries - most notably by Nazi Germany before and during World War II.