1994-06-09 - GPS encryption of low order bits

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From: peb@netcom.com (Paul E. Baclace)
To: cypherpunks@toad.com
Message Hash: 7a0731c33859c00b70285559c9ca5e1b86868b6dad94c367c64edbbf371c4130
Message ID: <199406091814.LAA04479@netcom.com>
Reply To: N/A
UTC Datetime: 1994-06-09 18:14:08 UTC
Raw Date: Thu, 9 Jun 94 11:14:08 PDT

Raw message

From: peb@netcom.com (Paul E. Baclace)
Date: Thu, 9 Jun 94 11:14:08 PDT
To: cypherpunks@toad.com
Subject: GPS encryption of low order bits
Message-ID: <199406091814.LAA04479@netcom.com>
MIME-Version: 1.0
Content-Type: text/plain


I don't know how they encrypt the "low order bits", but I do know that
it isn't a show-stopper.  Trimble Navigation makes GPS devices
that, once calibrated by a known position, are centimeter accurate.
This is done *without* a ground signal (an older technique around 
the GPS crippling).

Paul E. Baclace
peb@netcom.com





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