一种抵抗能量攻击的线性反馈移位寄存器  

New design of LFSR based stream ciphers to resist power attack

作　　者：赵永斌[1,2] 胡予濮[1] 贾艳艳[3] 

机构地区：[1]西安电子科技大学综合业务网理论及关键技术国家重点实验室,陕西西安710071 [2]石家庄铁道大学信息科学与技术学院,河北石家庄050043 [3]西安科技大学计算机学院,陕西西安710054

出　　处：《西安电子科技大学学报》2013年第3期172-179,200,共9页Journal of Xidian University

基　　金：973资助项目(2007CB311201);国家自然科学基金资助项目(60833008);保密通信重点实验室基金资助项目(9140C110201110C1102)

摘　　要：通过分析延迟序列和初始状态之间的关系,给出了能够完全抵抗能量攻击所需触发器数目的下界;提出了一种抵抗能量攻击的流密码线性反馈移位寄存器(LFSR)的设计方案.在抵抗LFSR能量攻击时,附加触发器的个数最多为5个,大大减少了LFSR的附加功耗.An additional large number of flip-flops are required for available linear feedback shift register （LFSR） design which can completely resist power attack on the stream cipher based on LFSR. By analyzing the relations between the delayed sequence and the initial states, the lower bound on the number of flip-- flops in the design of LFSR based stream ciphers to resist the power attack is given and a novel lightweight design to resist power attack is proposed. With this method, the number of flip--flops required is decreased to five and the power consumption is significantly reduced.

关 键 词：密码学 流密码 能量攻击 线性反馈移位寄存器 触发器 布尔函数 

分 类 号：TN918.1[电子电信—通信与信息系统]