A Fundamental Evaluation of EM Information Leakage Induced by IEMI for a Device with Differential Signaling
A Fundamental Evaluation of EM Information Leakage Induced by IEMI for a Device with Differential Signaling
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差分信号设备 IEMI 引起的 EM 信息泄漏的基本评估
DOI：
10.1109/apemc49932.2021.9597081
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Hayashi Yuichi
中科院分区：
文献类型：
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作者：
Kaji Shugo;Fujimoto Daisuke;Kim Youngwoo;Hayashi Yuichi
据报道，单端信号的故意电磁干扰 (IEMI) 会导致电磁 (EM) 信息泄漏的威胁。泄漏电磁波的强度可以通过感应干扰波的强度来控制。如果EM信息泄露方法可以应用于其他信令方案，更多的设备将受到威胁。因此，需要采取对策。这项研究表明，IEMI 引起的 EM 信息泄漏威胁存在于使用通用串行总线 (USB) 2.0 设备（差分信号标准之一）的其他信号方案中。具体来说，我们使用USB键盘作为评估目标，证明了IC的输出阻抗根据其输出状态而变化，导致反射波的幅度波动。结果，我们通过解调反射波的幅度来确认差分信号被泄漏。
The threat of electromagnetic (EM) information leakage induced by intentional electromagnetic interference (IEMI) for single-ended signals has been reported. The intensity of the leaked EM waves can be controlled by the intensity of the induced disturbance waves. If the EM information leakage method can be applied to other signaling schemes, more devices would be threatened. As a result, countermeasures need to be taken. This study shows that the threat of EM information leakage induced by IEMI exists in other signaling schemes, using universal serial bus (USB) 2.0 devices, one of the differential signaling standards. Specifically, using a USB keyboard as an evaluation target, we demonstrate that the output impedance of the IC changes according to its output states, causing fluctuations in the amplitude of the reflected waves. As a result, we confirm that the differential signal is leaked by demodulating the amplitude of the reflected waves.