摘要： 相关性电磁分析(CEMA)攻击技术被广泛应用于对密码芯片的侧信道分析攻击中,但是其采集的信号易受到外部噪声的影响,导致采集工作量较大。基于此,提出一种改进的CEMA攻击方案。使用PA 303N/BNC前置放大器对采集到的电磁信息进行放大后再作相关性分析,以提高攻击效率。利用在智能卡上实现的高级加密标准算法对该方法进行实验验证,结果表明,相对于经典的CEMA攻击,该方法获得密码芯片工作的正确密钥时所需的电磁迹数目较少,攻击效率更高,实用性更强。

关键词: 侧信道分析, 相关性电磁分析攻击, PA 303N/BNC前置放大器, 智能卡, 高级加密标准算法

Abstract: The Correlation Electromagnetic Analysis(CEMA) attacks technology is widely used in side channel analysis attacks for cryptographic chips,but the signal collected is easily affected by external noise and other factors, resulting in a large amount of work.To solve the problem,an improved attack scheme is proposed,which use the PA 303N/BNC preamplifier to enlarge the collected electromagnetic information,and then implement the correlation analysis to improve its attack efficiency.The Advanced Encryption Standard(AES) algorithm implemented on the smart card verifies the proposed scheme,result shows that comparing with the traditional CEMA attack,the proposed scheme only needs less electromagnetic curves to reconstruct the key,the efficiency is higher,and the practicability is stronger.

Key words: side channel analysis, Correlation Electromagnetic Analysis(CEMA) attacks, PA 303N/BNC preamplifier, smart card, Advanced Encryption Standard(AES) algorithm

中图分类号: 

• TP309