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Breaking German Wehrmacht Ciphers
This site describes ongoing efforts to decode ciphers used by the Germans during World War II. Includes reports on its own decoding of messages created with a "3-wheel German Army Enigma machine" as well as provides links to other decoding projects, such as the M4 Message Breaking Project, which uses a network of distributed computers to break the code of a 4-wheel German machine. Includes examples of messages, a timeline, and related material.
http://frode.home.cern.ch/frode/crypto/bgac/

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