[50900] in North American Network Operators' Group
RE: $400 million network upgrade for the Pentagon
daemon@ATHENA.MIT.EDU (Al Rowland)
Wed Aug 14 11:29:33 2002
From: "Al Rowland" <alan_r1@corp.earthlink.net>
To: <nanog@merit.edu>
Date: Wed, 14 Aug 2002 08:31:15 -0700
In-Reply-To: <00ab01c24316$978c21c0$fab6f0c7@networksplus.net>
Errors-To: owner-nanog-outgoing@merit.edu
"fold back" systems like Bose noise cancelling headsets depend on the
microphones being adjacent to each other. The further apart they are the
more difficult it becomes to "sync" the noise. A digital delay helps but
at some point of source divergence even it won't help.
Of course these measures are designed for inadvertent release of
information. Anyone with a window shouldn't be discussing things worth
eavesdropping on anyway. But in the real world...hence the air pipes.
Not that I would know anything about this sort of thing... ;0
Best regards,
_________________________
Alan Rowland
-----Original Message-----
From: owner-nanog@merit.edu [mailto:owner-nanog@merit.edu] On Behalf Of
Blake Fithen
Sent: Tuesday, August 13, 2002 3:13 PM
To: 'Brad Knowles'; 'gg'; 'Sean Donelan'; nanog@merit.edu
Subject: RE: $400 million network upgrade for the Pentagon
> Brad Knowles:
> The Pentagon has windows. It also has an ancient system of air
> pipes aimed at all of the windows...
<paranoia>
Is this sensitive info? Couldn't someone (theoretically) aim a
"beam" at an unoccupied office and another at their objective
office then filter out the 'noise'?
</paranoia>
Sorry for the O.T.
--
blake
> Brad Knowles, <brad.knowles@skynet.be>
>
> "They that can give up essential liberty to obtain a little temporary
> safety deserve neither liberty nor safety."
> -Benjamin Franklin, Historical Review of Pennsylvania.
>
> GCS/IT d+(-) s:+(++)>: a C++(+++)$ UMBSHI++++$ P+>++ L+ !E
> W+++(--) N+ !w---
> O- M++ V PS++(+++) PE- Y+(++) PGP>+++ t+(+++) 5++(+++)
> X++(+++) R+(+++)
> tv+(+++) b+(++++) DI+(++++) D+(++) G+(++++) e++>++++ h---
> r---(+++)* z(+++)
>
