> If you RTFA, you'll note that jamming is different than spoofing. Military GPS signals (P-code and future M-code) are encrypted, so spoofing is somewhat less

> If you RTFA, you'll note that jamming is different than spoofing. Military GPS signals (P-code and future M-code) are encrypted, so spoofing is somewhat less of a concern for the military. See https://en.wikipedia.org/wiki/GPS_signals#Precision_code https://en.wikipedia.org/wiki/GPS_signals#Precision_code and https://en.wikipedia.org/wiki/GPS_signals#Military_.28M-code.29 https://en.wikipedia.org/wiki/GPS_signals#Military_.28M-code... Outside of the military, both academia and industry are well aware of the potential for spoofing of civilian GNSS signals and have been developing proof of concept attacks and countermeasures for quite some time. See, for example, http://gpsworld.com/inexpensive-hack-spoofs-gps-in-smartphones-drones/ http://gpsworld.com/inexpensive-hack-spoofs-gps-in-smartphon... and https://www.ion.org/publications/abstract.cfm?articleID=14780 https://www.ion.org/publications/abstract.cfm?articleID=1478...