The Bombe was an electro-mechanical device used by British cryptologists to help decipher German Enigma-machine-encrypted secret messages during World War II. The British Bombe was developed from the
A wartime picture of a Bletchley Park Bombe
A three-rotor Enigma with plugboard (Steckerbrett)
The plugboard of an Enigma machine, showing two pairs of letters swapped: S–O and A–J. During World War II, ten plugboard connections were made.
A German Enigma key list with machine settings for each day of one month
The bomba, or bomba kryptologiczna, was a special-purpose machine designed around October 1938 by Polish Cipher Bureau cryptologist Marian Rejewski to break German Enigma-machine ciphers.
Bombe
…cryptologists to help decipher German Enigma-machine-encrypted secret messages during World War II. The British Bombe was developed from the Polish bomba, which had been designed at the Cipher Bureau by cryptologist Marian Rejewski, who had been breaking German Enigma messages for the previous seven…
Diagram of Rejewski's cryptologic bomb. For clarity, only one set of three rotors is shown (1); in reality, there were six such sets. An electric motor (2) turns the rotors. 3: Switches.