Ways to spot spoofing and I’d wager much more advanced ways to trick any enemy who is trying to leech onto our GPS network and use it to his own advantage, or spoof any other system of GPS satellites put up by future enemies. I foresee a day when the next fugitive Saddam Hussein, trying desperately to blend in, drives his beat up old jalopy right up to the SpecOps team lying in wait to kill him.
The military GPS receivers are not susceptible to spoofing.