. Hacktivism

15:05:02 Spying on a remote monitor.
Marcus Kuhn, a young associate professor of English Cambridge University, presented research that shows how anyone with a suitable PC, a special light detector and some hardware laboratory can reconstruct the contents of a screen for remote pc , analyzing only the light emitted from the monitor. The research was illustrated during a meeting of the IEEE Security and Privacy. Bearing in mind that a screen is 'rewritten' from 60 to 100 times per second, creating a faint pulse, so performing some mathematical operations on the reflection that these have on a wall it is possible to reconstruct the image of the screen. For now, the technique demonstrated works at one meter distance with the detector located half a meter from the monitor which in turn reflected on a white wall and everything must be said that light interference, such as solar make it impossible to achieve the same results. Although LCDs are immune to this type of measurements, because of the different technology that illuminates a horizontal line of pixels at a time. According to Kuhn, however, his technique can be improved to operate at a distance of 50 meters from the moment of twilight.