Bomba (cryptography)

This article is about the Polish decryption device. For the later British decryption device at Bletchley Park, see Bombe.
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.
Polish Cipher Bureau
Biuro Szyfrów
Methods and technology
Locations
Personnel
Deputy Chief
Chief of Radio Intelligence
Chief of German Section
Maksymilian Ciężki
Chief of Russian Section
Jan Graliński
Russian Section cryptologist
Piotr Smoleński

The bomba, or bomba kryptologiczna (Polish for "bomb" or "cryptologic bomb"), was a special-purpose machine designed around October 1938 by Polish Cipher Bureau cryptologist Marian Rejewski to break German Enigma-machine ciphers.