基于可变S盒的随机加密方案

研究了可变随机S盒对分组密码安全性的意义,给出了一种新的使用可变随机S盒的随机化分组密码算法,并在此基础上提出了相应的加密方案:在分组密码算法中,保持算法结构不变,将S盒作为变量,利用可变的S盒来抵御密码分析.随后给出安全性评估,证明该方案提高了分组密码抵抗目前已知攻击的能力.最后从S盒的生成方式与算法结构两方面讨论了改进策略. 

Random encryption scheme based on variable S-boxes

How the variable S-boxes would affect the security of the block cipher was studied and a new block cipher using random variable S-boxes was presented.A new encryption scheme based on such block cipher was put forward: the structure of the original encryption algorithm was kept,the S-box was taken as a variable and variable S-box was used instead of the primary one,which could increase the resistance against those known attacks.The security evaluation proves the scheme secure.Furthermore,a discussion on the ...