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- Q7854970 subject Q7210623.
- Q7854970 subject Q7879032.
- Q7854970 subject Q9384007.
- Q7854970 abstract "Turingery or Turing's Method (playfully dubbed Turingismus by Peter Ericsson, Peter Hilton and Donald Michie) was a hand codebreaking method devised in July 1942 by the mathematician and cryptanalyst Alan Turing at the British Government Code and Cypher School at Bletchley Park during World War II. It was for use in cryptanalysis of the Lorenz cipher produced by the SZ40 and SZ42 teleprinter rotor stream cipher machines, one of the Germans' Geheimschreiber (secret writer) machines. The British codenamed non-Morse traffic "Fish", and that from this machine "Tunny".Reading a Tunny message required firstly that the logical structure of the system was known, secondly that the periodically changed pattern of active cams on the wheels was derived, and thirdly that the starting positions of the scrambler wheels for this message—the message key—was established. The logical structure of Tunny had been worked out by William Tutte and colleagues over several months ending in January 1942. Deriving the message key was called "setting" at Bletchley Park, but it was the derivation of the cam patterns—which was known as "wheel breaking"—that was the target of Turingery. German operator errors in transmitting more than one message with the same key, producing a "depth", allowed the derivation of that key. Turingery was applied to such a key stream to derive the cam settings.".
- Q7854970 thumbnail SZ42-6-wheels-lightened.jpg?width=300.
- Q7854970 wikiPageExternalLink tutte.pdf.
- Q7854970 wikiPageExternalLink tunnyreportindex.html.
- Q7854970 wikiPageExternalLink lorenzcipher.pdf.
- Q7854970 wikiPageExternalLink cryptxp3.pdf.
- Q7854970 wikiPageExternalLink newman.pdf.
- Q7854970 wikiPageExternalLink tunny-001.htm.
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- Q7854970 wikiPageWikiLink Q7879032.
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- Q7854970 wikiPageWikiLink Q9384007.
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- Q7854970 comment "Turingery or Turing's Method (playfully dubbed Turingismus by Peter Ericsson, Peter Hilton and Donald Michie) was a hand codebreaking method devised in July 1942 by the mathematician and cryptanalyst Alan Turing at the British Government Code and Cypher School at Bletchley Park during World War II. It was for use in cryptanalysis of the Lorenz cipher produced by the SZ40 and SZ42 teleprinter rotor stream cipher machines, one of the Germans' Geheimschreiber (secret writer) machines.".
- Q7854970 label "Turingery".
- Q7854970 depiction SZ42-6-wheels-lightened.jpg.
