一种新的类CLEFIA密码结构抵抗差分分析的安全性评估  

Security Evaluation Against Differential Cryptanalysis for A New CLEFIA-Like Cryptographic Structure

作　　者：王念平[1] 倪亮[2] WANG Nianping;NI Liang(Information Engineering University,Zhengzhou 450001,China;School of Computer Science,Zhongyuan University of Technology,Zhengzhou 450007,China)

机构地区：[1]信息工程大学,河南郑州450001 [2]中原工学院计算机学院,河南郑州450007

出　　处：《信息工程大学学报》2025年第1期70-75,共6页Journal of Information Engineering University

基　　金：国家自然科学基金(61672031)。

摘　　要：提出一种新的类CLEFIA密码结构,并给出这种结构抵抗差分分析的安全性评估结果。在轮函数都是双射的条件下,当迭代轮数u=6k(k≥1)或6k+1(k≥3)时,证明u轮活动指标(活动轮函数个数)至少为u;当迭代轮数u为其他值时,证明u轮活动指标至少为(u-1)。此外,给出的活动指标的下界是可达的。A new CLEFIA-like cryptographic structure is proposed,and its security evaluation results,particularly its resistance to differential analysis,are presented.It is proven that when all round functions are bijective,the u-round active index(the number of active round functions)is u for u=6k(k≥1)or 6k+1(k≥3)while the u-round active index for the CLEFIA-like cryptographic structure is(u-1)in other cases.Furthermore,the lower bound of the active index established in this study is confirmed to be reachable.

关 键 词：类CLEFIA密码结构 差分分析 活动指标 

分 类 号：TN918.1[电子电信—通信与信息系统] TP309.7[电子电信—信息与通信工程]