![]() Unlike older experiments that similarly watched for minute vibrations to remotely listen in on a target, this new technique let researchers pick up lower-volume conversations, works with a far greater range of objects, and enables real-time snooping rather than after-the-fact reconstruction of a room's audio. By pointing an optical sensor attached to a telescope at one of those shiny objects-the researchers tested their technique with everything from an aluminum trash can to a metallic Rubik's cube-they could detect visible vibrations on an object's surface that allowed them to derive sounds and thus listen to speech inside the room. ![]() Now one group of researchers offers a surprising addition to that list: Remove every lightweight, metallic object from the room that's visible from a window.Īt the Black Hat Asia hacker conference in Singapore this May, researchers from Israel's Ben Gurion University of the Negev plan to present a new surveillance technique designed to allow anyone with off-the-shelf equipment to eavesdrop on conversations if they can merely find a line of sight through a window to any of a wide variety of reflective objects in a given room. Consider even stripping internal microphones from your devices. Put your phone in a Faraday bag-or a fridge. The most paranoid among us already know the checklist to avoid modern audio eavesdropping: Sweep your home or office for bugs. ![]()
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