Computers could transmit highly confidential data even without internet, Wi-Fi or Bluetooth by using their speakers to transmit ultrasonic noise that vibrates nearby smartphones
25 August 2022
By Matthew Sparkes
Sensitive data could be stolen from a secure computer by infecting it with malware that makes its speakers play ultrasonic frequencies to vibrate nearby smartphones, encoding the data in the movement.
“Air-gapped” computers, which often have their Wi-Fi, Bluetooth and internet connections disabled, are commonly used by government security services and key infrastructure control systems to prevent hackers from gaining access remotely. Mordechai Guri at Ben-Gurion University of the Negev, Israel, has spent …