类CLEFIA动态密码结构抵抗差分密码分析能力评估  

Security Evaluation Against Differential Cryptanalysis for CLEFIA-like Dynamic Cryptographic Structure

作　　者：杨继林 王念平 YANG Ji-lin;WANG Nian-ping(The PLA Strategic Support Force Information Engineering University,Zhengzhou,Henan 450001,China)

机构地区：[1]中国人民解放军战略支援部队信息工程大学,河南郑州450001

出　　处：《电子学报》2021年第11期2279-2283,共5页Acta Electronica Sinica

基　　金：国家自然科学基金(No.61672031)。

摘　　要：将动态思想融入分组密码设计,使得算法具有动态性能从而提高抗攻击能力,按照这种想法,本文提出“类CLEFIA动态密码结构”,并通过建立两类不同密码结构的差分对应之间的联系,给出类CLEFIA动态密码结构的差分密码分析结果.具体地,对4r(r≥1)轮类CLEFIA动态密码结构,在轮函数都是双射时,证明了l(l≥1)轮差分特征至少有l-1个活动轮函数.Based on the idea to integrate the dynamic idea into the block cipher design to make the algorithm have dy⁃namic performance and to improve the anti-attack ability,CLEFIA-like dynamic cryptographic structure is put forward in this paper.By establishing the relation between differential correspondences of two classes of cryptographic structures,the ability of CLEFIA-like dynamic cryptographic structure to resist differential cryptanalysis is given.Concretely,for 4r(r≥1)-round CLEFIA-like dynamic cryptographic structure,if the round functions are all bijective,then the number of active round functions for l-round differential characteristic is not less than l-1.

关 键 词：类CLEFIA动态密码结构 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]