摘要
研究了AESS盒的构造原理和主要代数性质,指出了AESS盒的仿射变换对周期为4,迭代输出周期不大于88,严格雪崩准则距离为432,代数表达式只有9项等。基于这些不足提出了构造S盒的改进方案。改进S盒的仿射变换对周期为16,迭代输出周期为256,而且S盒和逆S盒代数表达式项数均达到254项。将改进S盒与AES的S盒在平衡性、严格雪崩准则、非线性度、抗代数攻击阻力等10种代数性质上进行比较,实验结果表明改进S盒具有更好的性质。
This paper studies the construction principle and main algebraic properties of AES S-box,points out the S-box has these characteristics that periods of affine transformed pair is 4,periods of iterative-output is less than 88,strict avalanche criterion distance is 432,the algebraic expression has only 9 items and so on.Based on that,an improved S-box has been constructed.Periods of affine transformed pair is 16 and periods of iterative-output is 256 and both the algebraic expression of S-box and InvS-box have 254 items in the improved S-box.The improved S-box has been compared with AES S-box in 10 algebraic properties,such as balanceness,strict avalanche criterion,non-linear degree,resistance against the XSL attack etc.The experimental results suggest that the improved S-box has better characteristics.
出处
《计算机工程与应用》
CSCD
北大核心
2007年第25期143-146,共4页
Computer Engineering and Applications
关键词
S盒
多输出布尔置换
仿射变换
代数表达式
S-box
multi-output boolean permutation
affine transformation
algebraic expression
