[World War II]
Germany
"Enigma" cipher machine
(Date of shooting unknown)
Enigma machine. Replica of a German World War 2 radio room with a genuine Enigma electromechanical encryption machine. Messages were typed into the keyboard and a series of letters would light up on the machine's display, providing the encrypted version (the ciphertext). A system of rotors meant that each letter could be enciphered as any other, except itself. This is the standard 3-rotor model; the Navy had a more powerful 4-rotor version for communication with U-boats. By the end of the war, all the variants of the system could be broken by the Allies. Photographed at Bletchley Park, England, where Enigma messages were deciphered.