Optical Tempest FAQ

[Chris Kuethe]

On Fri, 3 Dec 2004 01:01:57 -0500, Dave Emery <die at dieconsulting.com> wrote:
> ...
>         In fact the greater hazard may sometimes be from red, yellow or
> green LEDs on the front of equipment that are directly driven with
> real data in order to allow troubleshooting - recovering data from one
> of those at a distance using a good telescope may be possible and most
> people don't think of the gentle flicker of the LED as carrying actual
> information that could be intercepted.

Like this classic. Was just as much fun to reread as it was the first time. :)

http://www.google.ca/search?q=cache:YdHPMAbPMeAJ:www.applied-math.org/optical_tempest.pdf+black+tape+over+modem+lights+tempest&hl=en&client=firefox
http://www.applied-math.org/optical_tempest.pdf

-- 
GDB has a 'break' feature; why doesn't it have 'fix' too?