[time-nuts] GPS Spoofing

Max Robinson max at maxsmusicplace.com
Mon Jul 29 22:47:07 EDT 2013


Bill quoted.

“The more they overtake the plumbing the easier it is to stop up the drain.”

Scotty in Star Trek The search for Spock.

Regards.

Max.  K 4 O DS.

Email: max at maxsmusicplace.com

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----- Original Message ----- 
From: "Fuqua, Bill L" <wlfuqu00 at uky.edu>
To: <time-nuts at febo.com>
Sent: Monday, July 29, 2013 12:12 AM
Subject: Re: [time-nuts] GPS Spoofing


  The idea behind GPS spoofing is that one or several surface antennas and 
sources could be set up in such a way that they would produce believable 
position data that would take a vessel off course. The problem with this 
concept is that the person in charge of the GPS spoofing hardware has to 
know exactly where the vessel is at all times to start with and other 
vessels some distance away, and not very far from the target vessel would 
get contradicting signals from the virtual satellites.
Software could be used to detect changes in position data that is 
inconsistent with present course and recent data. And in most cases there 
would be a period of very inconsistent signals from satellites and more 
obvious, signal strengths.
Another way to limit spoofing is to use directional antennas that prevent 
reception from near horizon signals. Or detect low angle signals and sound 
the alarm or implement a means of ignoring those sources.
The problem very high tech systems are often defeated by low tech solutions. 
Successful GPS spoofing would be very high tech.
Many high tech systems that the government had developed in the past have 
been defeated by low tech methods. An example is the microwave system that 
is intended to turn back rioters by inducing burning pain. It was defeated 
by using thick wooden shields which absorbed the RF energy.
Human resourcefulness and determination often defeats technology in low tech 
ways. And the more complex a system is the easier it is to defeat. “The more 
they overtake the plumbing the easier it is to stop up the drain.”
Most discussions have been about wireless spoofing. However, the most 
reliable way to do it would be an “inside job” where a device would be put 
on board and patched in the antenna lead. The correct GPS data would be 
received by the device and then it would produce a virtual constellation of 
satellites that would direct the vessel off course. However, the programmer 
would have to know the course that the pilot intended to take in the first 
place if his goal is to
take the vessel to a different destination.
73
Bill wa4lav
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