The bombe was an electromechanical device used by British cryptologists to help break German Enigma-machine-generated signals during World War II. The bombe was designed by Alan Turing, with an important refinement suggested by Gordon Welchman. The bombe was named after, and inspired by, a device that had been designed in 1938 by Polish Cipher Bureau cryptologist Marian Rejewski, and known as the "cryptologic bomb".

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  • The bombe was an electromechanical device used by British cryptologists to help break German Enigma-machine-generated signals during World War II. The bombe was designed by Alan Turing, with an important refinement suggested by Gordon Welchman. The bombe was named after, and inspired by, a device that had been designed in 1938 by Polish Cipher Bureau cryptologist Marian Rejewski, and known as the "cryptologic bomb". The British bombe was referred to by Group Captain Winterbotham as a "Bronze Goddess" because its case was made of bronze. The devices were more prosaically described by operators as being "like great big metal bookcases". A standard German Enigma employed, at any one time, a set of three rotors (in the German Navy, from early 1942, four rotors), each of which could be set in any of 26 positions. The bombe tried each possible rotor position and applied a test. The test eliminated thousands of positions of the rotors; the few potential solutions were then examined by hand. In order to use a bombe, a cryptanalyst first had to produce a "crib" – a section of ciphertext for which he could guess the corresponding plaintext.
  • Dans l'histoire de la cryptologie, la Bombe fut un instrument électromécanique utilisé par les cryptologues britanniques afin de casser les codes allemands d'Enigma pendant la Seconde Guerre mondiale. La Bombe fut ainsi nommée, d'après l'instrument de cryptologie modelé vers octobre 1938 par le cryptologiste polonais du Biuro Szyfrów Marian Rejewski, ce dernier instrument étant connu sous le nom de "Bombe cryptologique" . Une machine Enigma standard employait, en même temps, un groupe de trois rotors, chacun pouvant être installé sur 26 positions. La Bombe essayait chaque position de rotor possible et appliquait un certain test. Le test éliminait des milliers de positions des trois rotors; les quelques solutions possibles étaient alors examinées manuellement. Pour utiliser une Bombe, cependant, un cryptanalyste devait d'abord produire une copie -une section de Chiffrement pour lequel il pouvait deviner le décodage correspondant.
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  • The bombe was an electromechanical device used by British cryptologists to help break German Enigma-machine-generated signals during World War II. The bombe was designed by Alan Turing, with an important refinement suggested by Gordon Welchman. The bombe was named after, and inspired by, a device that had been designed in 1938 by Polish Cipher Bureau cryptologist Marian Rejewski, and known as the "cryptologic bomb".
  • Dans l'histoire de la cryptologie, la Bombe fut un instrument électromécanique utilisé par les cryptologues britanniques afin de casser les codes allemands d'Enigma pendant la Seconde Guerre mondiale. La Bombe fut ainsi nommée, d'après l'instrument de cryptologie modelé vers octobre 1938 par le cryptologiste polonais du Biuro Szyfrów Marian Rejewski, ce dernier instrument étant connu sous le nom de "Bombe cryptologique" .
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  • Bombe
  • Bombe électromécanique
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