General Report on Tunny | Search for a title, author or keyword | ||||||||
General Report on Tunny General Report on Tunny, With Emphasis on Statistical Methods. The report was written at Bletchley Park, the centre of Allied codebreaking during World War II, in 1945 by three codebreakers, Jack Good, Donald Michie, and Geoffrey Timms. This report describes the German Tunny ( Lorenz SZ40/SZ42 ) encoding machine and tells the full story of how the British broke Tunny and decoded a steady stream of messages from Hitler and other members of the German High Command. It includes an account of Colossus, the world's first large-scale electronic digital computer, installed at Bletchley Park in December 1943. This report was classified until the middle of 2000, when it was released to the Public Record Office, Kew ( document reference HW 25/4 and HW 25/5 ). The links in the table of contents below lead to a digital facsimile of the entire document. From AlanTuring.net.
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