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对流密码算法Phelix的差分故障攻击

Differential Analysis of Stream Cipher Phelix
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摘要 流密码算法Phelix是ESTREAM计划的一个候选算法,文中给出了模2n加环节X Y=Z的一个基于单比特故障的差分方程组求解算法.利用该算法采用面向比特的故障诱导模型对Phelix进行了差分故障攻击,该攻击理论上只需652个单比特故障就能完全恢复256bit的工作密钥,计算复杂度为O(220).实验结果显示,Phelix算法对差分故障攻击是不安全的. Phelix is a candidate algorithm for the ESTREAM stream cipher project.An algorithm was presented to solve a system of differential equations based on single-bit fault on X Y=Z in this paper.Then a bit-oriented differential fault analysis of Phelix based on the algorithm was shown.Theoretically,the 256-bit working key can be obtained by using 652 bit-faults,with the computational complexity of O(220).The result shows that the stream cipher Phelix is vulnerable to differential fault analysis.
作者 张中亚 关杰 ZHANG Zhong-ya,GUAN Jie(1.Information Engineering University,Zhengzhou 450004,China; 2.Unit 71282 of the PLA,Luoyang 471000,Henan,China)
出处 《上海交通大学学报》 EI CAS CSCD 北大核心 2013年第7期1131-1136,1142共7页 Journal of Shanghai Jiaotong University
基金 国家自然科学基金资助项目(61202491)
关键词 流密码 Phelix算法 差分方程 差分故障攻击 stream cipher Phelix differential equation differential fault analysis
作者简介 张中亚(1985-),男,河南省太康县人,硕士,研究方向为密码与信息安全. 关杰(联系人),女,教授,电话(Tel.):0371-81638052;E-mail:guanjie007@163.com.
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参考文献14

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