As weird and creepy as it may sound, researchers have invented a technique to steal your data by tweaking the brightness of your PC’s monitor by merely 3%.
In a paper published by the researchers from the Ben-Gurion University of the Negrev, Isreal has demonstrated how Air-gapped computers can be exploited to retrieve data by simply meddling with the brightness of the monitor by a percentage that will usually go unnoticed.
Air-gapped computers are workstations that are kept isolated from the internet and other internet-connected computers to safeguard the data stored in them.
The researchers introduced an optical covert channel through which the sensitive data is concealed on the LCD screen brightness in a covert way, which is invisible to users. The technique works even when the person is using the PC.
The attack model consists of the following stages:
In the first stage, researchers contaminated the target network by