RECOVERING THE WIRING OF ENIGMA'S UMKEHRWALZE A |
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Authors: | Philip Marks Frode Weierud |
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Affiliation: | 1. 139 Autumn Ridge Road, Bedminster NJ 07921 USA. Email: philmarks@worldnet.att.net.;2. 4 Le Pre Vert, 1041 Rte de Mategnin, F-01280 Prevessin-Moens FRANCE. Email: Frode.Weierud@cern.ch. |
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Abstract: | Umkehrwalze A was the original reflector used in the version of the Enigma machine employed by the German armed services. Its wiring was originally deduced by the Polish cryptanalyst Marian Rejewski in December 1932 or January 1933, but details of the wiring have not previously been published. Sufficient information to recover the wiring analytically is provided in a wartime document by Alan Turing, and other sources have been found to confirm the solution. This paper presents the wiring, along with alternative methods of recovering it from Turing's data. |
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Keywords: | Enigma Umkehrwalze reflector rotor wiring. |
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