GPS Isn't Very Secure. Here's Why We Need A Backup Ifeadi C. 00:05 Feed: All Latest, Zero Tech Blog The 24 satellites that keep GPS running in the US aren't especially secure. So private and federal groups are working on alternatives. via Zero Tech Blog Share this Share on FacebookTweet on TwitterPlus on Google+ Related PostsNew Ejection Seat Makes Rocketing Out of a B-2 Somehow SafeAugust's Best Gear: From Tiny Laptops to Big PhonesIs It Possible to Find Love Without Dating Apps?Why California's Privacy Law Won't Hurt Facebook or GoogleHere's How Fast That Jumping Tesla Was TravelingFirefox's New Browser Will Keep Brands From Stalking You