Poster: Inaudible Acoustic Noise from Silicon Capacitors for Voice-Command Injection
Poster: Inaudible Acoustic Noise from Silicon Capacitors for Voice-Command Injection
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DOI：
10.1145/3548606.3563526
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发表时间：
2022-11
期刊：
影响因子：
--
通讯作者：
K. Doi;T. Sugawara
中科院分区：
文献类型：
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作者：
K. Doi;T. Sugawara
电子产品中常用的多层陶瓷电容器（MLCC）会产生由电气偏差驱动的声学噪声。这样的声学噪声已经被利用来攻击系统的安全性。特别是，CapSpeaker使用听不见的声学噪声和互调失真（IMD）向语音可控系统无声地传递语音命令。硅电容器是一种新兴的技术，其通过使用不同结构和材料的半导体制造工艺制造的较小的占地面积来实现较大的电容。尽管存在差异，硅电容器仍然会产生噪声吗？我们通过实验证明，一个现成的硅电容器通过IMD产生可听见的声学噪声，从而肯定地回答了这个问题; CapSpeaker在新电容器上仍然可行
Multi-layer ceramic capacitors (MLCCs), commonly used in electronics products, can generate acoustic noise driven by electrical deviation. Such acoustic noise has been exploited to attack systems' security. In particular, CapSpeaker silently delivers voice commands to voice-controllable systems using inaudible acoustic noise and intermodulation distortion (IMD). Silicon capacitor is an emerging technology that achieves a larger capacitance with a smaller footprint fabricated with semiconductor manufacturing processes using different structures and materials. Do silicon capacitors still generate acoustic noise despite the differences? We positively answer the question by experimentally showing that an off-the-shelf silicon capacitor generates audible acoustic noise through IMD; CapSpeaker is still feasible with the new capacitor