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 
Source de l’article sur The Hacker News