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2002 plaque, Bletchley Park, "commemorat[ing] the work of Marian Rejewski, Jerzy Różycki, and Henryk Zygalski, mathematicians of the Polish intelligence service, in first breaking the Enigma code [sic: it was a cipher]. Their work greatly assisted the Bletchley Park code breakers and contributed to the Allied victory in World War II."
The Polish General Staff, realising what was likely to happen, decided to share their work on Enigma decryption with their western allies. Marian Rejewski later wrote: [I]t was not [as Harry Hinsley suggested, cryptological] difficulties of ours that prompted us to work with the British and French, but only the deteriorating political situation.
Milestones was given for "First Breaking of Enigma Code by the Team of Polish Cipher Bureau, 1932-1939", they built the ‘bomba’ – the first cryptanalytic machine to break codes. Their work was a foundation of British code breaking efforts which, with later American assistance, helped end World War II. [6]
Bletchley's Polish Memorial, commemorating "the [prewar] work of Marian Rejewski, Jerzy Różycki and Henryk Zygalski, mathematicians of the Polish intelligence service, in first breaking the Enigma code. Their work greatly assisted the Bletchley Park code breakers and contributed to the Allied victory in World War II."
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.
A Polish Enigma "double" was a machine produced by the Polish Biuro Szyfrów that replicated the German Enigma machine. The Enigma double was one result of Marian Rejewski 's remarkable achievement of determining the wirings of the Enigma's rotors and reflectors.
Dilly Knox, leading cryptologist, cracked the code of the commercial Enigma machines used in the Spanish Civil War, one of the British participants in the conference in which the Poles disclosed to their French and British allies their achievements in Enigma decryption, broke the Abwehr non-steckered Enigma
Their work was a foundation of British code breaking efforts which, with later American assistance, helped end World War II. [3] [self-published source] In 2021 the Enigma Cipher Centre, an educational and scientific institution dedicated to the Polish mathematicians who broke the Enigma cipher, including Henryk Zygalski, opened in Poznań. [4]