This was the Nazis highest-level communications cipher system, which was used for communications between the Germany Army High Command in Berlin and their Army Commands in the field throughout occupied Europe, some of which were signed " Adolf Hitler, F�hrer ".
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For transformation involving reasonable number of n message symbols, both of the foregoing cipher systems ( the Lucifer cipher system, and has become the standard for national data encryption standards such as the Data Encryption Standard and the Advanced Encryption Standard.
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Bazeries continued his cryptanalytic work there even after he retired from the Army in 1899, assisting in solving German military ciphers during World War I . However, many of Bazeries recommendations to the government for improvements in official cipher systems met severe bureaucracy and rebuffs, which became a constant source of frustration for him in an otherwise illustrious career.
