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...rjan reˈjefski]}}; 16 August 1905 – 13 February 1980) was a [[Poland|Polish]] [[mathematician]] and [[cryptography|cryptologist]] who in 1932 solved th ...], Rejewski had attended a secret [[cryptology]] course conducted by the [[Polish General Staff]]'s [[Biuro Szyfrów|Cipher Bureau]], which he joined full-tim ...