Kasumi算法相关密钥Sandwich攻击区分器的构造  

Therelated-Key sandwich distinguishers for kasumi algorithm

作　　者：孔凡杰[1] 李磊[1] 韩文报[1] 

机构地区：[1]信息工程大学信息工程学院,郑州450002

出　　处：《四川大学学报（自然科学版）》2012年第2期315-322,共8页Journal of Sichuan University(Natural Science Edition)

基　　金：国家自然科学基金(61003291);国家973计划项目(2007CB807902);国家863计划重点项目新概念高效能计算机体系结构与系统研究开发

摘　　要：相关密钥Sandwich攻击是目前理论上攻击Kasumi算法最有效的方法之一.2010年Shamir等构造了7-轮Kasumi算法相关密钥Sandwich攻击区分器,该区分器成立的概率为2^(-14),并被用于8-轮Kasumi算法的攻击.本文利用相关密钥Sandwich攻击的基本思想,扩展了中间层的概率计算方法,构造了15个概率为2^(-14)或2^(-16)的7-轮Kasumi算法相关密钥Sandwich区分器.在相同的攻击效率下,为8-轮Kasumi算法的攻击提供了更多的选择.Related Key Sandwich Attack is an efficient method to attack Kasumi block ciphers. Shamir and his coauthors constructed a relatedkey sandwich distinguisher for 7-round Kasumi and improved that the probability of the relatedkey sandwich distinguisher is 2-14. The distinguisher can be used to attack the 8-round Kasumi. The purpose of this paper is to construct some other fifteen relatedkey sandwich distinguishers for Kasumi. The probability of these distinguishers is 2^-14or 2^-16. The people could have more opportunity attack 8-round Kasumi algorithm.

关 键 词：KASUMI算法 差分分析 Boomerang攻击 3GPP 

分 类 号：TP918.1[自动化与计算机技术]