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Data Encryption Standard
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DES flow diagram
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A botanical illustration from the Voynich manuscript, a codex, scientific or magical text in an unidentified language, in cipher; end of the 15th or during the 16th century (?).
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Data Encryption Standard: Media

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DES flow diagram

Flow diagram for the 16-step Data Encryption Standard (DES) operation.

From Data Encryption Standard, FIPS Publ. no. 46, National Bureau of Standards, 1977
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