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Digest Algorithm MD5 Message
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When we want to sign a file, we are the first to use an abstract algorithm for the entire document,Map the entire file into a 128bit message digest. To carry out the signature of the abstract. MD5 is such an abstract algorithm.
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Secure hash algorithm SHA (Hash Algorithm Secure,
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When we want to make a digital signature on a large file, we can not encrypt the entire document using RSA and other signature algorithms.
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Implementation of DES and 3DES
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Written in the C language used to achieve DES and 3DES encryption and decryption of the code, 3DES test perfect run, des may be a little bit of a problem.
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