Cipher Bureau (Poland)
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The Cipher Bureau was the Second Department of Polish General Staff unit charged with SIGINT and both cryptography and cryptanalysis. The precursor of the agency that would become the Cipher Bureau wa
General Staff building (Saxon Palace), destroyed in World War II. The arcade still shelters Tomb of the Unknown Soldier, before which stood Thorvaldsen's equestrian statue of Prince Józef Poniatowski. In this building, from 1932, the Cipher Bureau broke the German plugboard military Enigma.
Enigma, an electro-mechanical rotor machine with scrambler comprising entry drum, three rotors, and reflector. This military model also has a plugboard.
Marian Rejewski when he first reconstructed Enigma
A Zygalski perforated sheet (1938)
Jerzy Różycki
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Jerzy Witold Różycki was a Polish mathematician and cryptologist who worked at breaking German Enigma-machine ciphers before and during World War II.
Jerzy Różycki ca. 1928, some 4 years before joining the Cipher Bureau
Jerzy Różycki memorial bench in Wyszków, near Warsaw
2007 monument to cryptologists Rejewski, Różycki, and Zygalski before the Imperial Castle in Poznań