Sandwich-Boomerang attack on reduced round CLEFIA

作     者：毛明 Qin Zhiguang 

作者机构：School of Computer Science and EngineeringUniversity of Electronic Science and Technology of China 

出 版 物：《High Technology Letters》 (高技术通讯（英文版）)

年 卷 期：2014年第20卷第1期

页      面：48-53页

核心收录：

学科分类：0839[工学-网络空间安全] 08[工学] 081201[工学-计算机系统结构] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：Supported by the National Science Foundation of China(No.60973161) the Doctoral Fund of Ministry of Education of China(No.200806140010) the National High Technology Research and Development Program of China(No.2009AA01Z422) 

主　　题：block cipher CLEFIA Sandwich-Boomerang distinguisher 

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 *** to the property of CLEFIA,a new technique Sandwich-Boomerang cryptanalysis is used on *** 8-round Sandwich-Boomerang distinguisher of CLEFIA is constructed using the best differential characteristic of *** then,based on the distinguisher,an attack against 10-round CLEFIA is *** number of chosen plaintexts required is 2^(119)(or 2^(120)) and the time complexity is 2^(120)(or 2^(121)).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.