3DES使用的是()
A、A.加密—加密—解密
B、B.加密—解密—加密
C、C.解密—加密—解密
D、D.加密—加密—加密
A、A.加密—加密—解密
B、B.加密—解密—加密
C、C.解密—加密—解密
D、D.加密—加密—加密
A、A. 3DES is muchmore secure than DES. B、B. Both DES and 3DES are stream ciphers. C、C. DES uses 64 bitkeys, although the effective key lengthis only 56bits. D、D. The decryption operation for both DES and 3DES is the same as the encryption operation. E、E. DES can only be used for encryption, whereas 3DES can also be used for authentication.
A、加密算法DES完整性算法SHA1、DiffiE-HEllmAn组中(2) B、加密算法DES完整性算法MD5、DiffiE-HEllmAn组低(2) C、加密算法3DES完整性算法SHA1、DiffiE-HEllmAn组中(2) D、加密算法3DES完整性算法SHA1、DiffiE-HEllmAn组低(1) E、加密算法3DES完整性算法MD5、DiffiE-HEllmAn组低(1)