[107364] in Cypherpunks
Decrypting GPS
daemon@ATHENA.MIT.EDU (John Young)
Tue Jan 12 21:04:44 1999
Date: Tue, 12 Jan 1999 20:39:03 -0500
To: cypherpunks@EINSTEIN.ssz.com
From: John Young <jya@pipeline.com>
Reply-To: John Young <jya@pipeline.com>
The US Army Corps of Engineers published a doc
in July 1998, "Use, Acquistion and Security of Precise
Positioning Service GPS Receivers for Civil
Applications," which describes how the military-grade
encrypted protection of the Precise Position Service can
be decrypted for use on civil engineering and other
federal projects:
http://jya.com/ec1110-1-90.htm
An informative appendix details the space, control
user segments; the characteristics of GPS signals;
and other operating features.
We'd like to hear about the encryption system used
if that's not classified.
