upnorth

Moderator
Verified
Staff member
Malware Hunter
"Lamphone," a novel side-channel attack for eavesdropping sound; this attack is performed by using a remote electro-optical sensor to analyze a hanging light bulb's frequency response to sound.We show how fluctuations in the air pressure on the surface of the hanging bulb (in response to sound), which cause the bulb to vibrate very slightly (a millidegree vibration), can be exploited by eavesdroppers to recover speech and singing, passively, externally, and in real time.
 

brigantes

Level 1
This is nothing new at all. Over 30 years ago the same thing was accomplished by shooting a laser at any window within a room in which people were talking. You could hear everything, even whispers. Nation-states been using this tech for decades.
 
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