两类动态密码结构抵抗不可能差分和零相关线性能力评估OA北大核心CSTPCD
Security Evaluation Against Impossible Differential Cryptanalysis and Zero Correlation Linear Cryptanalysis for Two Dynamic Cryptographic Structures
动态密码的设计与分析是当前密码学领域研究的热点.本文针对类CLEFIA动态密码结构和四分组CLEFIA变换簇抵抗不可能差分和零相关线性分析的能力进行评估.当两类动态密码结构的轮函数为双射时,通过研究密码组件的可交换性质,证明了这两类动态密码结构各自置换等价于标准静态密码结构.利用建立的置换等价关系,通过构造静态密码结构不可能差分和零相关线性区分器,证明了4n轮类CLEFIA动态密码结构所有结构均存在8轮的不可能差分和零相关线性区分器,证明了4n轮四分组CLEFIA变换簇所有结构均存在9轮的不可能差分和零相关线性区分器.
The design and analysis of dynamic block ciphers are the frontier of current cryptography research.For CLEFIA-like dynamic cryptographic structure and four-block CLEFIA-like transform cluster,this paper focuses on the se-curity evaluation against impossible differential cryptanalysis and zero correlation linear cryptanalysis.When the round functions of the two dynamic cryptographic structures are bijective,by studying the commutative properties of the modules,the fact that the two dynamic cryptographic structures are permutation equivalence of the two static structures respectively can be proved.With the established equivalence relation,by constructing the impossible differential and zero correlation dis-tinguishers of two static structures,8-round impossible differentials and zero correlation linear hulls of 4n-round CLEFIA-like dynamic cryptographic structure can be found as well 9-round ones for 4n-round four-block CLEFIA-like transform cluster.
沈璇;刘国强;孙兵;何俊
国防科技大学信息通信学院,湖北武汉 430010国防科技大学理学院,湖南长沙 410073||中国科学院信息工程研究所,信息安全国家重点实验室,北京 100093国防科技大学理学院,湖南长沙 410073||商用密码理论与技术创新湖南省工程研究中心,湖南长沙 410000
电子信息工程
分组密码动态密码类CLEFIA动态密码结构四分组CLEFIA变换簇不可能差分零相关线性
block cipherdynamic cryptographic structureCLEFIA-like dynamic cryptographic structurefour-block CLEFIA-like transform clusterimpossible differentialszero correlation linear hulls
《电子学报》 2024 (003)
709-718 / 10
国家自然科学基金(No.62002370,No.62272470,No.61702537);国防科技大学科研计划项目(No.ZK21-36);信息安全国家重点实验室开放基金(No.2020-MS-02) National Natural Science Foundation of China(No.62002370,No.62272470,No.61702537);Scientific Research Plan of National University of Defense Technology(No.ZK21-36);State Key Laboratory of Informa-tion Security(No.2020-MS-02)
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