"Academics Steal Data From Air-Gapped Systems via a Keyboard’s LEDs"

Security researchers at Ben-Gurion University have demonstrated that it is possible for data to be extracted from secure air-gapped computers by attackers, using the Caps Lock, Num Lock, and Scroll Lock LEDs on a keyboard. The attack, called CTRL-ALT-LED poses a threat to highly secure environments such as those that store top-secret documents or non-public proprietary information. The CTRL-ALT-LED exfiltration method has been tested on different optical capturing devices, including security cameras, smartphone cameras, high-grade optical/light sensors, and more. This article continues to discuss how the CTRL-ALT-LED attack works and other research on the exfiltration of data via keyboard LEDs.

ZDNet reports "Academics Steal Data From Air-Gapped Systems via a Keyboard’s LEDs"