古典密码体制续-密码分析

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1、高飞密码学第3章古典密码体制续——密码分析gaof@bupt.edu.cn1.攻击模型字母概率字母概率A0.082B0.015C0.028D0.043E0.127F0.022G0.020H0.061I0.070J0.002K0.008L0.040M0.024N0.067O0.075P0.019Q0.001R0.060S0.063T0.091U0.028V0.010W0.023X0.001Y0.020Z0.0012.仿射密码的密码分析字母频数字母频数A2B1C0D7E5F4G0H5I0J0K5L2M2N1O1P2Q0R8S3T0U2V4W0X

2、2Y1Z03.代换密码的密码分析字母频数字母频数A0B1C15D13E7F11G1H4I5J11K1L0M16N9O0P1Q4R10S3T2U5V5W8X6Y10Z204.维吉尼亚密码的密码分析.034.031.035.044.047.037.043.038.042.037.033.032.035.047.036.045.032.029.044.072.036.027.030.058.036.0375.045.032.033.038.060.034.034.034.050.033.033.043.040.033.028.036.040.04

3、4.037.050.034.034.039.044.038.0354.048.029.042.043.044.034.038.035.032.049.035.031.035.065.035.038.036.045.027.035.034.034.037.035.046.0403.069.044.032.035.044.034.036.033.030.031.042.045.040.045.046.042.037.032.034.037.032.034.043.032.026.0472.035.031.036.037.035.039.028.

4、028.048.061.039.032.040.038.038.044.036.030.042.043.036.033.049.043.041.0361的值i5.希尔密码的密码分析6.基于LFSR的流密码的密码分析谢谢!Email:gaof@bupt.edu.cnTel:86-10-62283240Web:www.bupt.edu.cn