Spies Can Eavesdrop by Watching a Light Bulb’s Vibrations
July 27th, 2020
Handy for targets who don’t use smartphones.
Via: Wired:
The list of sophisticated eavesdropping techniques has grown steadily over years: wiretaps, hacked phones, bugs in the wall—even bouncing lasers off of a building’s glass to pick up conversations inside. Now add another tool for audio spies: Any light bulb in a room that might be visible from a window.
Researchers from Israeli’s Ben-Gurion University of the Negev and the Weizmann Institute of Science today revealed a new technique for long-distance eavesdropping they call “lamphone.” They say it allows anyone with a laptop and less than a thousand dollars of equipment—just a telescope and a $400 electro-optical sensor—to listen in on any sounds in a room that’s hundreds of feet away in real-time, simply by observing the minuscule vibrations those sounds create on the glass surface of a light bulb inside. By measuring the tiny changes in light output from the bulb that those vibrations cause, the researchers show that a spy can pick up sound clearly enough to discern the contents of conversations or even recognize a piece of music.
<!–
–>
<!– AD CAN GO HERE
END: AD CAN GO HERE –>
Leave a Reply
You must be logged in to post a comment.
Source Article from https://www.cryptogon.com/?p=58976