Enigma machine

Enigma machine

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Credit: JAMES KING-HOLMES/BLETCHLEY PARK TRUST/SCIENCE PHOTO LIBRARY

Caption: Enigma machine, a German electromechanical device used in World War 2 to encrypt messages. After setting up the machine, messages were typed into the keyboard (at front), and a series of letters on the display above would light up, providing the encrypted version. A system of rotors meant that each letter could be enciphered as any other character (except itself). This is the four-rotor version, used by the Navy to communicate with U- boats (submarines). Enigma messages were deciphered by the Allies at Bletchley Park, England, where this machine is now housed.

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Keywords: 4, 4-rotor, axis, bletchley park, cipher, code, computing history, cryptography, cryptology, device, electromechanical, encryption, enigma, four, german, historical, keyboard, machine, naval, nazi, rotor, submarine, technology, two, u-boat, world war 2

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