Tuesday, March 5, 2002

Optical Tempest Hack

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

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