RE: law enforcement for profit

From: Billy Brown (
Date: Sun May 07 2000 - 01:17:13 MDT

Michael S. Lorrey wrote:
> This data deals with air broadcast radiofrequencies. One area that is
> not public knowledge, or what I haven't seen much of to date, are
> signals transmitted in the sinewave harmonic patterns through the power
> lines. These are quite present, and they can be amplified by a
> surveillance system through use of a few simple components to boost the
> harmonic output of the surveilled facility.

Interesting idea. I don't think you could get anything useful about the
operation of the electronic components (mostly because CPU & motherboard
architectures come and go in less time than it takes for DOD to procure a
piece of equipment), but that darned keyboard interface might stand out
enough to be a viable target.

Or maybe not - there is an awful lot of interference between that signal and
an external power line. It would probably take some serious hands-on work to
figure out if it could actually be done.

Billy Brown

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