Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!csd4.milw.wisc.edu!uxc!iuvax!rutgers!att!cbnews!GA.CJJ@Forsythe.Stanford.EDU From: GA.CJJ@Forsythe.Stanford.EDU (Clifford Johnson) Newsgroups: sci.military Subject: Spoofing GPS signals? Message-ID: <5936@cbnews.ATT.COM> Date: 26 Apr 89 04:10:10 GMT Sender: military@cbnews.ATT.COM Lines: 22 Approved: military@att.att.com From: "Clifford Johnson" I'm curious as to the planned military application of the Global Positioning System, vis a vis spoofing. Is this a real problem? A radio clock designer wrote to comp.risks: I bet the GPS satellite time signals contain error detection codes, if not error correction, which ought to reduce false time output to a minimum, but won't stop a bad person from faking the time. Does this mean that giving our nuclear missiles GPS-based guidance systems makes them vulnerable? Self-destruct mechanisms were avoided because of the possibility of Soviets spoofing the signals - what could they accomplish if they could spoof the GPS signal, and how feasible is it to do so? And at the tactical level, to what extent would any kind of GPS-based guidance give rise to vulnerability? To: MILITARY@ATT.ATT.COM