From: KPJ (kpj@sics.se)
Date: Mon Apr 29 2002 - 13:46:27 MDT
It appears as if <naddy@mips.inka.de> wrote:
|
|I don't know whether listening in on keyboards has been demonstrated
|in practice, but the idea has been floating around for some time.
People have demonstrated practical remote keyboard listening devices.
>SNIP<
|The keyword for further reading on this topic is "Tempest". The
|military has been concerned about RF leaks for a long time. Standards
|how to shield sensitive areas have been around for decades. Basically
|you put everything in a big Faraday cage. No windows, metal mesh
|or sheet metal on all walls/ceiling/floor, airlock-style doors.
|The tricky part is shielding power and communications lines because
|these can serve as conduits for EM radiation. The more paranoid
|protection levels resemble locking yourself in a bank vault.
Yes, in the Olden Days. Today the high frequencies in CPU's and networks
make the radiation leak through almost invisible cracks in the materials,
making it very hard to lock in the radiation (or lock out the radiation
from the anti-electronics weapons). We live in interesting times.
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