'This is a very sophisticated set of hacks and oftentimes you won't even know this happened to you,' Green said. With this knowledge, hackers can install malware to get data from targetted sources. One form of a targetted hack works like this: Hackers exploit unknown flaws in the iOS programming that even its developers don't yet know about. Journalists and activists are most at risk for this kind of hack. The average person probably won't be singled out and remotely targeted by hackers because it's expensive, sometimes costing millions for hacks of newer phones, said Matthew Green, an associate professor at the Johns Hopkins Internet Security Institute.
