How Lasers Exploit Photoacoustic and PhotoelectricPhenomena to Inject Signals into MEMS Microphones
Benjamin Cyr,
Vedant Sumaria,
Yan Long
et al.
Abstract:An amplitude-modulated laser can be used to generate false, yet coherent acoustic signals on the outputs of MEMS microphones. While this vulnerability has ramifications on the security of cyber-physical systems that trust these microphones, the physical explanation of this effect remained a mystery. Without an understanding of the physical phenomena contributing to this signal injection, it is difficult to design effective and reliable defenses. In this work, we show the degree to which the mechanisms of therm… Show more
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