Daniel Genkin of the University of Michigan, Mihir Pattani of the University of Pennsylvania, Roei Schuster of Cornell Tech and Tel Aviv University, and Eran Tromer of Tel Aviv University and Columbia University investigated a potential new avenue of remote surveillance that they have dubbed "Synesthesia": a side-channel attack that can reveal the contents of a remote screen, providing access to potentially sensitive information based solely on "content-dependent acoustic leakage from LCD screens."Synesthesia, at its core, is pretty much just Van Eck phreaking with a twist. Where Van Eck phreaking typically uses radio signals leaking from display hardware to snoop on what a computer user's perusing, Synesthesia listens for aural emissions from the bits and pieces that are required to power a display. Depending on what you're looking at on your computer's screen, the power being sent out to drive each pixel ramps up or down. This changes the pitch of power running through the display's guts. By capturing this audio for review, using the microphone built into the device or a nearby device like an Amazon Echo or other digital assistant-enabled device (never let one in your house,) it's very possible that a hacker could sort out what you were looking at with a bit of skill and a whole lot of machine learning. Creepy. Image via Pxhere
Wednesday, 29 August 2018
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