Sandwich-Boomerang attack on reduced round CLEFIA

被引：0

作者：

毛明 ^{[1
]}

Qin Zhiguang ^{[1
]}

机构：

[1] School of Computer Science and Engineering,University of Electronic Science and Technology of China

来源：

HighTechnologyLetters | 2014年 / 20卷 / 01期

基金：

国家教育部博士点专项基金资助; 国家高技术研究发展计划(863计划); 美国国家科学基金会;

关键词：

block cipher; CLEFIA; Sandwich-Boomerang; distinguisher;

D O I：

暂无

中图分类号：

TP309 [安全保密];

学科分类号：

081201 ; 0839 ; 1402 ;

摘要：

CLEFIA（named after the French word "Clef" meaning "Key"） is an efficient,highly secure block cipher proposed by SONY Corporation in the 14 th International Workshop on Fast Software Encryption（FSE-2007） and many cryptanalyses have been used to analyze it.According to the property of CLEFIA,a new technique Sandwich-Boomerang cryptanalysis is used on it.An 8-round Sandwich-Boomerang distinguisher of CLEFIA is constructed using the best differential characteristic of CLEFIA.And then,based on the distinguisher,an attack against 10-round CLEFIA is proposed.The number of chosen plaintexts required is 2;(or 2;) and the time complexity is 2;(or 2;).Compared with a 7-round impossible Boomerang distinguisher presented by Choy in the 4th International Workshop on Security（IWSEC-2009）,the differential characteristics used in the attack are all the best ones,so it is believed that the attack is the best result that the Boomerang attacks can get on CLEFIA at present.

引用

页码：48 / 53

页数：6

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