Web: http://arxiv.org/abs/2301.10056

Jan. 25, 2023, 2:10 a.m. | Yan Long, Pirouz Naghavi, Blas Kojusner, Kevin Butler, Sara Rampazzi, Kevin Fu

cs.CR updates on arXiv.org arxiv.org

Our research discovers how the rolling shutter and movable lens structures
widely found in smartphone cameras modulate structure-borne sounds onto camera
images, creating a point-of-view (POV) optical-acoustic side channel for
acoustic eavesdropping. The movement of smartphone camera hardware leaks
acoustic information because images unwittingly modulate ambient sound as
imperceptible distortions. Our experiments find that the side channel is
further amplified by intrinsic behaviors of Complementary
metal-oxide-semiconductor (CMOS) rolling shutters and movable lenses such as in
Optical Image Stabilization (OIS) and …

acoustic cameras eavesdropping smartphone

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