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Ralph Tester
Ralph Paterson Tester (2 June 1902 – May 1998) was an administrator at Bletchley Park, the British codebreaking station during World War II.〔 That version is a facsimile copy, but there is a transcript of much of this document in '.pdf' format at: , and a web transcript of Part 1 at: 〕 He founded and supervised a section named the ''Testery'' for breaking Tunny (a Fish cipher).
==Background==
The Lorenz cipher machine had twelve wheels, and was thus most advanced, complex, faster and far more secure than the three-wheeled Enigma. Lorenz was used to encipher top-secret messages between German Army H.Q. in Berlin, and the top generals and field-marshals on all fronts, including Adolf Hitler himself.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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