基于电路模块自相似性的硬件木马检测方法

由于硬件木马种类的多样性和SoC电路制造过程中不可预测的工艺变化,硬件木马检测变得极具挑战性。现有的旁路信号分析法存在两个缺点,一是需要黄金模型作为参考,二是工艺波动会掩盖部分硬件木马的活动效果。针对上述不足,提出一种利用电路模块结构自相似性的无黄金模型检测方法。通过对32位超前进位加法器的软件仿真实验和对128位AES加密电路的硬件仿真实验,验证了该方法的有效性。实验结果表明,在45 nm工艺尺寸下,对于面积占比较小的硬件木马,该方法的检测成功率可以达到90.0%以上。

A Hardware Trojan Detection Method Based on Self-Similarity Between Circuit Modules

Detecting hardware Trojans becomes a challenging task because of the diversity of hardware Trojans and the unpredictable process variations during the fabrication of SoC. Existing side-channel analysis approaches have two drawbacks. On one hand, most side-channel analysis detecting approaches require a set of golden chips as a reference, which increases the test cost and complexity. On the other hand, with these approaches, the effect of Trojans may be easily masked by process variations under most circumstances. Regarding the above drawbacks, a hardware Trojan detection approach based on self-similarity between circuit modules in SoC was proposed. The effectiveness of the proposed method was verified by software simulation experiments on 32-bit CLA and by hardware simulation experiments on 128-bit AES encryption circuit. The results showed that, under a 45 nm process, the method could achieve a detection success rate of over 90.0% for hardware Trojans with small area.