Thursday we brought you a story of an improbable but ingenious cybersecurity attack vector called Air-ViBER , which uses fan vibrations to transmit data to a nearby listening device in an air-gapped environment. Another team of researchers, led by Mikhail Davidov and Baron Oldenburg, developed an equally ingenious but more insidious attack vector - rapid manipulation of clock speeds of an AMD Radeon Pro WX3100 GPU to turn it into a tunable radio transmitter; and ferrying data off as inaudible and invisible RF transmissions. The graphics card itself works as a radio transmitter, the computer needn't have a WLAN device.

What's worse, the signal has an impressive 50-foot (15.2 m) range, can pass through walls, and can have a far higher data-rate than the fan vibration hack. Even worse, the attack doesn't require any special hacks of the GPU driver or physical modification of the graphics card in any way - only a tool that can manipulate its clock speeds (any overclocking software can do that). Luckily, overclocking tools are privileged applications (requiring ring-0 access), and in most machines it springs up a UAC gate unless the overclocking software installs a driver and service that runs in the background (this installation requires a UAC authorization in the first place). If someone managed to install privileged software on your computer, you have bigger problems than a graphics card that likes to sing. Find technical details of the hack here , and a video presentation here .