A Related-Key Boomerang Distinguishing Attack of Threefish-256  

作　　者：LIU Shusheng WANG Libin GONG Zheng 

机构地区：[1]School of Computer Science,South China Normal University,Guangzhou 510631,Guangdong,China

出　　处：《Wuhan University Journal of Natural Sciences》2012年第5期414-420,共7页武汉大学学报（自然科学英文版）

基　　金：Supported by the National Natural Science Foundation of China(61100201);the Foundation for Distinguished Young Talents in Higher Education of Guangdong(LYM11053)

摘　　要：The block cipher Threefish is the main component of Skein, which is based on ARX. Based on the efficient algorithms for calculating the differential of modular addition, we extend local collisions of Threefish-256 to more round by using related-key differential of addition in this paper. A related-key boomerang distinguish attack is proposed on 31-round Threefish-256 with a time complexity of 2^（234）.The block cipher Threefish is the main component of Skein, which is based on ARX. Based on the efficient algorithms for calculating the differential of modular addition, we extend local collisions of Threefish-256 to more round by using related-key differential of addition in this paper. A related-key boomerang distinguish attack is proposed on 31-round Threefish-256 with a time complexity of 2^（234）.

关 键 词：SKEIN differential analysis related-key analysis Boomerang attack 

分 类 号：TN918.4[电子电信—通信与信息系统]