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Nobody mentioned TEMPEST yet in this comment thread. It's old (60s) but very interesting stuff. https://en.wikipedia.org/wiki/Tempest_%28codename%29 https://en.

Nobody mentioned TEMPEST yet in this comment thread. It's old (60s) but very interesting stuff. https://en.wikipedia.org/wiki/Tempest_%28codename%29 https://en.wikipedia.org/wiki/Tempest_%28codename%29 It includes acoustical leaks as one side channel. Also see: http://www.nsa.gov/public_info/_files/cryptologic_spectrum/tempest.pdf http://www.nsa.gov/public_info/_files/cryptologic_spectrum/t... It's cool that they were able to demonstrate it that well.

hardwaresofton 13y ago
Came in here to make this exact comment -- the amount of things looked into as ways to leak secrets was insane, even going as far as detecting screen radiation IIRC.
- midas007 13y ago
  Check out this researcher's papers: http://www.cl.cam.ac.uk/~mgk25/ http://www.cl.cam.ac.uk/~mgk25/ esp. "Optical Time-Domain Eavesdropping Risks of CRT Displays"