[GreenKeys] On Tempest

[WA5CAB at cs.com]

Hmm.  Wonder why Seismic is redacted?

In a message dated 6/22/2011 10:27:01 PM Central Daylight Time, 
gblock at sbcglobal.net writes: 
> Unbelievable
> 
> Gerry
> AD6MC
> 
> -----Original Message-----
> From: greenkeys-bounces at mailman.qth.net
> [mailto:greenkeys-bounces at mailman.qth.net] On Behalf Of Jeffrey Angus
> Sent: Wednesday, June 22, 2011 7:33 PM
> To: GreenKeys
> Subject: [GreenKeys] On Tempest
> 
> I got to thinking about Tempest stuff.
> 
> And I realized, what the spooks reluctantly figured out.
> 
> "What good is encrypting if they can listen to the TTY machine
> bang out the message in plaintext?"
> 
> An excellent article about just that realization here:
> <http://www.nsa.gov/public_info/_files/cryptologic_spectrum/tempest.pdf>
> 
> Now that I think back on it, back in the aerospace industry, I
> remember doing more than my share of radiated and conducted
> emissions testing on various bits and pieces. But at the time I
> thought we were just trying to make the gear quite so as NOT to
> interfere with the stuff next to it. Well, yeah, that was part of it.
> But now, looking back, making sure it was "clean" from a spook
> perspective was a good part of it too.
> 
> Jeff-1.0
> wa6fwi
> 

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