Security researchers have discovered that data transmitted through modems and routers can be remotely reconstructed from the equipments LED status indicators. According to experiments, their light-to-information retrieval method is successful even when the light is captured at a considerable distance from the source. If you want to prevent people from spying on your data, you may want to tape up those blinking LEDs!
http://applied-math.org/optical_tempest.pdf
Tuesday, March 5, 2002
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