As practice shows, physically isolated computers are by no means an impregnable fortress, and if desired, they can be hacked (a striking example is Stuxnet attacks). Nevertheless, infecting a computer disconnected from the Internet (for example, by connecting a malicious device to it) is one thing, but extracting data from it is quite another.
One of the theoretical methods for obtaining data from isolated networks involves the use of radio waves. Duo Labs specialist Mikhail Davydov showed how using an antenna and a computer script, you can steal data through the signals of a computer video card.
In his laboratory in Seattle, Davydov set up a Dell workstation and got to work. Being at a distance of 15 m from the attacked system, using a radio antenna, the researcher studied the radio signals emanating from the video card, and then wrote a script that allows them to be controlled. By controlling the duration of each radio transmission from the video card, using a software-defined radio (SDR), Davydov was able to receive the radio signals and then decode them and extract the data.
Recall that last week, experts from the Ben-Gurion University in the Negev (Israel) demonstrated a way to extract data from physically isolated computers using cooler vibrations.
