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Showing content from https://archive.org/details/hw-25-3/ below:

The Prof's Book: Turing's Treatise on the Enigma : Alan M. Turing : Free Download, Borrow, and Streaming : Internet Archive

In late 1940 Alan Turing wrote a report describing the methods he and
his colleagues at Bletchley Park had used to break into the German
Enigma cipher systems. At Bletchley it was known as 'the Prof's Book.' A
copy of this handbook was at last released from secrecy by the American
National Security Agency in April 1996, under the title 'Turing's
Treatise on the Enigma.' Subsequently, a much better original copy was
released by the (British) National Archives, box HW 25/3. This also
revealed a title which had been lost in the American copy: Mathematical theory of ENIGMA machine. (Though, oddly, the report does not actually have any mathematical theory.)

Addeddate
2016-04-16 06:09:33
Identifier
hw-25-3
Identifier-ark
ark:/13960/t5dc2mm1f
Ocr
ABBYY FineReader 11.0
Pages
156
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