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1、r 简化的简化的DES算法算法：IPFKSWFKIP-1IPFKSWFKIP-1P10移位移位P8P8移位移位8bit 明文明文8bit 密文密文8bit 明文明文8bit 密文密文10bit 密钥密钥加密加密解密解密K1K1K2K2IPL08bit 明文明文8bit 密文密文R0L1R1E/PS0S1P4IP-1fK1K2f84444884422444444882 6 3 1 4 8 5 74 1 3 5 7 2 8 64 1 2 3 2 3 4 12 4 3 1P10LS-110bit 密钥密钥LS-1LS-2LS-2K1105P8P8K255555883 5 2 7 4 10 1 9 8
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3、5678001111116 3 7 4 8 5 10 9K2r 生成密钥生成密钥：12345678101010101234001112102 6 3 1 4 8 5 71234567800110011123400114 1 2 3 2 3 4 112345678100101101234567810100011K112345678001101011234001112340101S0S1120112341001123400111234011012340011明文明文2 4 3 1123401011234567810110110120112345678111010014 1 2 3 2 3 4 11
4、234567800111100K212345678000000111234000012340011S0S1120012340100123400111234011012340011123456780011111112341011123401104 1 3 5 7 2 8 6密文密文2 4 3 11234100012345678111010011234101112012 6 3 1 4 8 5 71234567810110110123401104 1 2 3 2 3 4 112345678001111001234567800111111K212345678000000111234000012340011S0S1120012340100123410111234001112340110密文密文2 4 3 1123410001234567800110011121012345678101010104 1 2 3 2 3 4 11234567810010110K112345678001101011234001112340101S0S1120112341001123401101234001112340110123456781010001112340011123400114 1 3 5 7 2 8 6明文明文2 4 3 112340101
