des encryption and decryption code core symmetric key encryption algorithms DES by IBM in the 1970s with the development of to, and after a government encryption standard screening, in November 1976 by the United States government to adopt, DES followed by the United States National Bureau of Standards and the American National Standards Institute ANSI recognition. DES use 56 to 64 key pieces of data encryption, as well as 64 pieces of data for 16 coding. Coding with each round, a 48 "round" key values from the full 56 key works.

des.cpp
des.h
jiaJieMi.h

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