New Glowworm Attack Recovers Device’s Sound from Its LED Power Indicator

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A novel technique leverages optical emanations from a device’s power indicator LED to recover sounds from connected peripherals and spy on electronic conversations from a distance of as much as 35 meters.
Dubbed the “Glowworm attack,” the findings were published by a group of academics from the Ben-Gurion University of the Negev earlier this week, describing the method as “an optical TEMPEST 

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