[52151] in Cypherpunks
Re: Beat Remote Monitor Snooping?
daemon@ATHENA.MIT.EDU (Gary Howland)
Thu Mar 14 19:57:57 1996
Date: Thu, 14 Mar 1996 21:54:10 +0100
From: Gary Howland <gary@kampai.euronet.nl>
To: cypherpunks@toad.com
At 10:46 PM 3/13/96 -0500, Alan Horowitz wrote:
>Visual contrast is not the same thing as frequency diffrence. It is quite
>easy to measure extremely small changes of phase. As in, your
>plain-vanilla FM receiver.
However, that's not how SVGA CRT's do it. NTSC (TV video) modulation is done by phase modulation of the 3.579545 MHz subcarrier. SVGA has three different baseband analog signals feeding three electron beams.
Even so, they still should be able to pick up SVGA with a little tinkering.
kkkkk
