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对低代数次数分组密码的SQUARE攻击 被引量:3

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摘要 利用代数方法,对SQUARE攻击的数学基础进行了研究.指出SQUARE区分器存在当且仅当n比特输出平衡字节和n比特输入活跃字节之间的多项式函数的次数2n-2,并给出了平衡字节通过S盒后仍为平衡字节的充要条件.在寻找SQUARE区分器时,采用代数方法有可能分析更多轮输出的性质.文中还研究了SQUARE攻击对不同结构密码的有效性问题,指出当一个Feistel密码的轮函数具有低代数次数时,SQUARE攻击有可能会失效,即对Feistel密码实施SQUARE攻击时,S盒的性质对攻击将产生一定的影响;在对SPN密码实施SQUARE攻击时,非线性S盒的性质不会对攻击产生影响.文章的最后研究了SQUARE攻击与其他密码分析方法之间的联系,指出一个算法抗插值攻击的一个必要条件是算法能抵抗SQUARE攻击.
出处 《中国科学:信息科学》 CSCD 2010年第6期777-785,共9页 Scientia Sinica(Informationis)
基金 国家自然科学基金(批准号:60803156) 信息安全国家重点实验室开放基金(批准号:01-07) 东南大学移动通信国家重点实验室开放基金(批准号:W200807)资助项目
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参考文献20

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共引文献10

同被引文献19

  • 1吴文玲,卫宏儒.低轮FOX分组密码的碰撞-积分攻击[J].电子学报,2005,33(7):1307-1310. 被引量:11
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