【摘要】 对DES S盒的输入输出分布特性进行了深入分析,利用DES加密准则及一系列函数的定义,给出S盒的输入输出分布表达式。分析了f函数及S盒的输入输出分布特性,结果表明,相邻两个S盒的输入是独立均匀分布的,但其输出并不是均匀的。运用这种特性可对DES进行已知明文的攻击。更多还原

【Abstract】 The I/O properties of DES S-box is analysed thoroughly,the distribution expression of S-box is given with the rule of DES and some functions defined.It is showed that the input of two adjoining S-boxes is independent and uniform distribution,but their output is not with analysis for function f and I/O distribution properties of S-box.DES can be attacked with this properties in plaintext be known.更多还原