Impossible differential attacks on FOX

被引：0
|
作者：
Wei, Yue-Chuan [1 ]
Sun, Bing [2 ]
Li, Chao [1 ,2 ,3 ]
机构：
[1] College of Computer, National University of Defense Technology, Changsha 410073, China
[2] Science College, National University of Defense Technology, Changsha 410073, China
[3] State Key Laboratory of Information Security, Graduate School of Chinese Academy of Sciences, Beijing 100049, China
来源：
Tongxin Xuebao/Journal on Communications | 2010年 / 31卷 / 09期
关键词：
D O I：
暂无
中图分类号：
TN [电子技术、通信技术];
学科分类号：
0809 ;
摘要：
Some 4-round impossible differentials were found by means of meet-in-the-middle. By using impossible differential cryptanalysis methods and time-memory balanced technique, the results of previous attacks on FOX cipher were improved. The experiment results show that For FOX64, 5-round attack needs 239 chosen plaintexts and 268 encryptions, 6-round attack needs 256 chosen plaintexts and 2133 encryptions, 7-round needs 256 and 2213. For FOX128, 5-round attack needs 272 chosen plaintexts and 2134 encryptions. Therefore, 7-round FOX64/256 and 5-round FOX128/192/256 are not immune to impossible differential attack.
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页码：24 / 29
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