Prohibition never works. It's been tried with booze, drugs, pay sex, and guns, at least, and failed every time.
If people want something badly enough, they will get it. Ask yourself, is the collateral damage worth it? MMV, -John ================= > We've been discussing both GNSS denial/spoofing vs Loran denial/spoofing > and the relative difficulty of doing same to determine which system is > most survivable > > That being said the penalty for using the truck stop/spy shop GPS should > be in the hundreds of thousands per day and carry serious jail time. As > most of them are easily capable of affecting a square mile as if you look > at the specs from their Chinese suppliers. > > If you want to keep your boss from finding that you spent more than > allocated time eating lunch just wrap the antenna in Al foil > > > > Sent from my iPhone > > On Jul 29, 2013, at 1:12 AM, "Fuqua, Bill L" <wlfuq...@uky.edu> wrote: > >> 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. >> âThe more they overtake the plumbing the easier it is to stop up the >> drain.â >> Most discussions have been about wireless spoofing. However, the most >> reliable way to do it would be an âinside jobâ 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 >> _______________________________________________ >> time-nuts mailing list -- time-nuts@febo.com >> To unsubscribe, go to >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
