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AC分组密码的差分和线性密码分析
引用本文:吴文玲,马恒太,卿斯汉.AC分组密码的差分和线性密码分析[J].软件学报,2003,14(3):569-574.
作者姓名:吴文玲  马恒太  卿斯汉
作者单位:中国科学院信息安全技术工程研究中心,北京,100080;中国科学院软件研究所,北京,100080
基金项目:Supported by the National Natural Science Foundation of China under Grant Nos.60103023, 60083007 (国家自然科学基金)
摘    要:讨论AC分组密码对差分和线性密码分析的安全性,通过估计3轮AC的差分活动盒子的个数下界和12轮AC的线性活动盒子的个数下界,本文得到AC的12轮差分特征概率不大于2-128和线性逼近优势不大于2-67.因此,AC分组密码对差分和线性密码分析是安全的.

关 键 词:差分密码分析  线性密码分析  差分特征  线性逼近  S-盒
文章编号:1000-9825/2003/14(03)0569
收稿时间:2001/11/13 0:00:00
修稿时间:2001年11月13

Differential and Linear Cryptanalysis of AC Block Cipher
WU Wen-Ling,MA Heng-Tai and QING Si-Han.Differential and Linear Cryptanalysis of AC Block Cipher[J].Journal of Software,2003,14(3):569-574.
Authors:WU Wen-Ling  MA Heng-Tai and QING Si-Han
Abstract:The security of AC against differential and linear cryptanalysis is discussed in this paper. It is shown that 12-round AC has no differential characteristic with probability higher than 2-128 and no linear approximations with approximation bias larger than 2-67 by estimating the lower bound of the number of active-boxes in 3-round differential characteristic and 12-round linear approximation. Hence, AC is secure to differential and linear cryptanalysis.
Keywords:differential cryptanalysis  linear cryptanalysis  differential characteristic  linear approximation  S-box
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