On September 11, 2001, Ed Snowden was driving to work at the NSA in Maryland. He had only just got his driver's license and worked for a private company out of someone's home. "I think that's what really caused a lot of concerns for people, not just on the public level, but the private level," he says. The battle raging between those who seek online encryption and those who protect it is math-based; we're all part of same fight.