密钥泄露下Even-Mansour密码的滑动攻击  

Slide Attacks on the Even-Mansour Scheme with Key Leakage

作　　者：杨光 张平[1,2] 胡红钢[1,2] Yang Guang;Zhang Ping;Hu Honggang(School of In fore,ration Science and Technology,University of Science and Technology of China,Hefei 23002;Key Laboratory of Electromagnetic Space Information,Chinese Academy of Sciences,Hefei 230027)

机构地区：[1]中国科学技术大学信息科学技术学院,合肥230027 [2]中国科学院电磁空间信息重点实验室,合肥230027

出　　处：《信息安全研究》2018年第6期518-525,共8页Journal of Information Security Research

基　　金：国家自然科学基金项目(61522210;61632013)

摘　　要：Even-Mansour密码体制以其简单的结构和严格的安全性证明被广泛地应用于分组密码,一直以来都是分组密码研究方向中热门的研究点,该密码体制最典型的一类攻击方案研究是滑动密码分析.然而,对于该体制在密钥泄露情况下的攻击之前并没有相关的研究,首先给出一个基于Even-Mansour密码的滑动攻击改进的密钥泄露攻击,在Even-Mansour密码体制密钥泄露情况下,攻击性能大大优于原始攻击.接着,针对Even-Mansour加密的变种加密方案,给出其密钥泄露情况下的攻击方案.改进的攻击方案在性能上较原始攻击方案有很大提升.The Even-Mansour scheme has been widely used in the block cipher for its simple structure and strict security,and it has always been a very popular research point in the block cipher. The main tool for attacking this scheme is the slide attack. However, there is no relevant research on the attack on the Even-Mansour scheme with key leakage. In this paper, we present an improved key-leakage attack based on slide attacks on the Even-Mansour scheme. Moreover,we present the key-leakage attacks on some variants of the Even-Mansour scheme. The performance of improved attacks are much better than the original attacks when the key is leaked.

关 键 词：Even-Mansour密码体制 对称密码学 分组密码 密码分析 密钥泄露 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]