1.国防科技大学信息通信学院,湖北武汉 430010
2.国防科技大学理学院,湖南长沙 410073
3.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
4.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
[ "沈 璇 男,1990年1月生,湖北荆门人,博士.现为国防科技大学信息通信学院副教授,主要研究方向为对称密码的设计与分析. E-mail: shenxuan_08@163.com" ]
[ "刘国强 男,1986年1月生,湖南浏阳人,博士.现为国防科技大学理学院副教授,主要研究方向为对称密码的设计与分析. E-mail: liuguoqiang87@hotmail.com" ]
[ "孙 兵 男,1981年8月生,江苏南通人,博士.现为国防科技大学理学院副教授,主要研究方向为对称密码的设计与分析. E-mail: happy_come@163.com" ]
[ "何 俊 男,1979年6月生,湖北公安人,博士.现为国防科技大学信息通信学院教授,主要研究方向为网络安全.E-mail: hejun17c@nudt.edu.cn" ]
收稿:2022-03-25,
修回:2022-08-03,
纸质出版:2024-03-25
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沈璇,刘国强,孙兵,等.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[J].电子学报,2024,52(03):709-718.
SHEN Xuan, LIU Guo-qiang, SUN Bing, et al.Security Evaluation Against Impossible Differential Cryptanalysis and Zero Correlation Linear Cryptanalysis for Two Dynamic Cryptographic Structures[J].Acta Electronica Sinica, 2024, 52(03): 709-718.
沈璇,刘国强,孙兵,等.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[J].电子学报,2024,52(03):709-718. DOI:10.12263/DZXB.20220311
SHEN Xuan, LIU Guo-qiang, SUN Bing, et al.Security Evaluation Against Impossible Differential Cryptanalysis and Zero Correlation Linear Cryptanalysis for Two Dynamic Cryptographic Structures[J].Acta Electronica Sinica, 2024, 52(03): 709-718. DOI:10.12263/DZXB.20220311
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4
n
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4
n
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 security 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 p
roperties 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 distinguishers of two static structures
8-round impossible differentials and zero correlation linear hulls of 4
n
-round CLEFIA-like dynamic cryptographic structure can be found as well 9-round ones for 4
n
-round four-block CLEFIA-like transform cluster.
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