New Side-Channel Attack Uses Microphone to Read Screen Content

August 24th, 2018 By Ionut Ilascu
 
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Using regular microphones, academic researchers managed to pick up acoustic signals from computer displays and determine in real time the type of content on the screen.
 
The technique could potentially allow an attacker to run surveillance operations, exfiltrate information, or spy on the victim's browsing activity.
 
By studying the audio emissions from multiple LCD screens (with both CCFL and LED backlighting), the researchers noticed a connection between the images displayed and the sound they made. They found that what is shown on screen comes with a distinct audio signature.
 
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