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Re: Beat Remote Monitor Snooping?
>>>>> Alan Horowitz <[email protected]> writes:
> Visual contrast is not the same thing as frequency diffrence. It
> is quite easy to measure extremely small changes of phase.
Apropos of *what*?! If it was an NTSC colour TV; yes, you could
measure the colour by the phase of the 3.579 colour burst. But modern
computer monitors (i.e. VGA) don't represent colour that way at all --
they use separate red, green, and blue video signals. And the
original poster is correct -- it is extremely difficult to determine
which guns are generating any given pixel, using van Eck monitoring.
The only com/mil ELINT demo I've ever seen of a VGA monitor generated a
greyscale display.
> Nice try, but no cigar.
If the shoe fits...
--
Roger Williams PGP key available from PGP public keyservers
Coelacanth Engineering consulting & turnkey product development
Middleborough, MA wireless * DSP-based instrumentation * ATE
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