A research team from Israel’s Ben-Gurion University of the Negev's cybersecurity research center has discovered a new way of data extraction from air-gapped computers via using passive devices like earbuds, earphones, headphones, and speakers.Now, the same research center has claimed to be able to use computer speakers and headphones to act as microphones and receive data. The devices can be used to send back the signals and make the otherwise safe practice of air-gapping less secure.
As per the new technique [PDF], data is extracted in the form of inaudible ultrasonic sound waves and transmission occurs between two computers installed in the same room while data is shared without using microphones. more
