Digital Signature Algorithm, using RSA asymmetric cryptographic algorithm should be non-symmetric encryption algorithm. DES is a symmetric encryption algorithm, and can not be used as a digital signature algorithm. Symmetric encryption algorithm, encryption and decryption using the same key, so I can not guarantee complete confidentiality of the key (at least two people know the encryption and decryption), it can not only determine the encryption identity.

2.txt
DES.cpp
DES.h
RSA
...\encryption.c
...\rsa.c
...\rsa.h
TestHashsign.cpp
说明.txt

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