一种软件级双轨逻辑的完整实现方案  

A Complete Proposal of Dual-Rail Logic on Software Level

作　　者：顾星远[1] 谷大武[1] 谢鑫君 

机构地区：[1]上海交通大学计算机科学与工程系,上海200240 [2]上海通用识别技术研究所,上海201112

出　　处：《通信技术》2013年第4期1-4,共4页Communications Technology

摘　　要：旁路攻击是一种通过分析密码设备在运行时所产生的旁路信息来分析该密码设备的秘密信息的方法。Paul Kocher等人在1998年提出的功耗分析现在已经是针对密码设备的旁路攻击中非常常见的一种。在硬件实现的密码设备中,双轨逻辑是一种有效的抵抗功耗分析的方法,它通过用两位物理比特来表示一位逻辑比特,使数据0和1的表述对称,从而平衡了功耗的大小。对于软件实现的密码设备,也可以借鉴双轨逻辑的思路,这里给出了一个较为完备的软件级双轨逻辑方案,解决了一些前人方案的不周全指出,并之后在一个DES算法的实验中,验证方案的有效性。Power attack, proposed by Paul Kocher in 1998, is now a common kind of side channel attack on cryptographic devices. In the hardware implementation of cryptographic algorithms, dual-rail logic is a useful method to resist the power attack. With two physical bits for expression of one logic bit, the degree of power consumption is ballanced in the processing of different data. In the software implementation of cryptographic algorithm, the same thinking could be referred to. An even more complete proposal of dual-rail logic on software level in the software implementation of cryptographic algorithms is suggested in the paper, which could solve some indaequacies of the former proposals. An experiment in software DES indicates the effectiveness of the proposal.

关 键 词：功耗分析 双轨逻辑 双轨编码 基本逻辑门 S盒 列混淆 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]