Bombe decryption machine

Bombe decryption machine

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

Caption: Bombe decryption machine. Designed by mathematician Alan Turing, this device was used during World War 2 to decrypt German communications enciphered with the Enigma machine. The bombe was used to work out the Enigma settings in use each day, allowing messages to be deciphered. It required a short stretch of encrypted message with a known meaning (a "crib"). It was named after the Bomba, a machine used by Polish cryptographers to break simple variants of Enigma before the war. This is a replica at Bletchley Park, England, the original site of the Allied codebreaking effort.

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Keywords: bletchley park, bombe, breaking, cipher, code, codebreaking, computer, computing history, cracking, cryptography, cryptology, decoding, decryption, device, early, electromechanical, enigma, forerunner, historical, machine, precursor, rotor, rotors, technology, two, world war 2

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