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Marian Rejewski
Marian Adam Rejewski (; 16 August 1905 – 13 February 1980) was a Polish mathematician and cryptologist who, in 1932, solved the Enigma machine, the main cipher device used by Germany. The success of Rejewski and his colleagues jump-started British reading of Enigma in World War II, and the intelligence so gained, code-named "Ultra", contributed, perhaps decisively, to the defeat of Nazi Germany(Note 1).
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