类Piccolo结构的差分安全性评估  

Differential security evaluation of Piccolo-like structure

作　　者：王念平 殷勍 WANG Nianping;YIN Qing(School of Crytography Engineering,Information Engineering University,Zhengzhou 450004,China;Space Engineering University,Beijing 101416,China)

机构地区：[1]信息工程大学密码工程学院,河南郑州450004 [2]航天工程大学,北京101416

出　　处：《通信学报》2022年第2期55-64,共10页Journal on Communications

基　　金：国家自然科学基金资助项目(No.61672031)。

摘　　要：为丰富分组密码的设计,提出类Piccolo结构及其设计原理,并深入研究了类Piccolo结构抵抗差分密码分析的能力。通过研究差分特征的输入输出传递特性,得到任意轮类Piccolo结构的活动轮函数个数的一个下界。分析结果表明,在轮函数都是双射的条件下,当迭代轮数l≥6时,l轮类Piccolo结构的活动轮函数个数≥l;当迭代轮数l为1,2,3,4,5时,l轮类Piccolo结构的活动轮函数个数≥l-1。In order to diversify the design of block cipher, Piccolo-like structure was proposed with principles of design.Security evaluation for Piccolo-like structure against differential cryptanalysis was deeply studied. By studying the input-output propagation characteristics of differential characteristics, the lower bound on the number of active round functions for arbitrary round Piccolo-like structure was given. The results show that, under the condition that the round functions are all bijective, there are at least l active round functions for l-round Piccolo-like structure if l≥6, and there are at least l-1 active round functions for l-round Piccolo-like structure if l is 1,2,3,4,5.

关 键 词：类Piccolo结构 差分密码分析 活动轮函数 

分 类 号：TN918.1[电子电信—通信与信息系统]