Explanation of DES

Give a brief explanation of the term DES.

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DES is Data Encryption Standard, the encryption block cipher stated and endorsed through the U.S. government in the year of 1977 as the official standard; the details can be found in latest official FIPS (or Federal Information Processing Standards) publication regarding DES. It was really developed at IBM. DES has been expansively studied because its publication and is the most recognized and widely employed cryptosystem in world.

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