This paper presents the design and analysis of a pro-active strategy to detect the presence of an electromagnetic (EM) side-channel analysis (SCA) attack, using Patterned-Ground co-planar Capacitive Asymmetry Sensing (PG-CAS) system. The PG-CAS system senses the asymmetry created in the plate-ground capacitance and turns on a SCA countermeasure in presence of an EM probe. The proposed PG-CAS system for approaching probe consists of the EM SCA detection sensor plate and circuits. The EM SCA detection sensor is implemented as a grid of four metal plates of the same dimensions using the top metal layer along with a patterned-ground plane at the immediate lower metal layer. The EM SCA detection system consists of a proximity to capacitance conversion circuit, digital synchronization logic circuit to detect and alarm the IC, and an EM SCA countermeasure. When an attack is detected, the countermeasure is turned on based on the deviation of the symmetry of the plate-ground capacitance pairs. The PG-CAS system-level post-layout simulation results using TSMC 65nm technology and Ansys Maxwell show a $>5\times $ improvement in the detection range and a $\sim 29\times $ improvement in power consumption over existing inductive sensing methods for attack detection.

中文翻译：

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PG-CAS：使用基于开关电容器的图案化接地共面电容不对称传感进行主动 EM-SCA 探头检测

本文介绍了一种主动策略的设计和分析，该策略使用图案接地共面电容不对称传感 (PG-CAS) 系统来检测电磁 (EM) 侧信道分析 (SCA) 攻击的存在。PG-CAS 系统感测板地电容中产生的不对称性，并在存在 EM 探头的情况下启动 SCA 对策。所提出的用于接近探头的 PG-CAS 系统由 EM SCA 检测传感器板和电路组成。EM SCA 检测传感器被实现为由四个相同尺寸的金属板组成的网格，使用顶部金属层以及紧邻下部金属层的图案化接地平面。EM SCA 检测系统由接近电容转换电路、用于检测和报警 IC 的数字同步逻辑电路以及 EM SCA 对策组成。当检测到攻击时，根据板地电容对的对称性偏差启动对策。使用 TSMC 65nm 技术和 Ansys Maxwell 的 PG-CAS 系统级布局后仿真结果显示 $>5\次$检测范围的改进和 $\sim 29\次$与现有的用于攻击检测的感应传感方法相比，功耗有所改善。