Researchers find way to spy on remote screens — through the webcam mic

absolutely wild: “Because of the way computer screens render a display—sending signals to each pixel of each line with varying intensity levels for each sub-pixel—the power sent to each pixel fluctuates as the monitor goes through its refresh scans. Variations in the intensity of each pixel create fluctuations in the sound created by the screen's power supply, leaking information about the image being refreshed—information that can be processed with machine learning algorithms to extract details about what's being displayed.”