TEMPEST laptops (fwd)

[Jim Choate]

Forwarded message:

> Date: Thu, 05 Nov 1998 09:28:06 -0800
> From: Michael Motyka <mmotyka at lsil.com>
> Subject: Re: TEMPEST laptops (fwd)

> The distinction you are trying to express is that not all signals have
> equal information content and that it is the levels of the high-content
> ones that matter.

Nope. What I am saying is the absolute magnitude of the carrier wave is
irrelevant, it's the modulation that matters and that modulation if small
and it's riding on a big carrier is hard to get at because you swamp your
front-ends because of dynamic range.

> Fine, but shielding is indiscriminate so shield away.

Shielding will attenuate all parts of the signal so it is a Good Thing (TM).

> And run your Tesla coil and some Ramones music to increase the ambient
> noise while you're doing sensitive computing.

Gabba gabba hey hey...thought I don't run my Tesla Coil when my computers
are on, they object to the 4ft sparks.

> Look for MIB carrying Dewars in your neighborhood! 
> How cold do Peltier junctions get? 
> Probably good enough for a sidewinder or a low-noise rcvr.

Peltier devices are for thermal transport by binding the thermal photons
and transporting them to a different environ where they may be emitted.
Hence the original environ is cooled.

You're talking about Josephson Junctions I suspect and they're useless for
signal detection, they're a switch. SQUIDS are what are used for truly
small level signals.

The KKK took my baby away....


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