50.2 MB (2.2 MB compressed)
4684 x 3747 pixels
39.6 x 31.8 cm ⏐ 15.6 x 12.5 in (300dpi)
NATIONAL SECURITY AGENCY / SCIENCE PHOTO LIBRARY NATIONAL SECURITY AGENCY / SCIENCE PHOTO LIBRARY
Editorial use only.
US Navy Bombe decryption machine and operator. Based on the design 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.
Model release not available. Property release not required.