The following script is from "DARPA Dan" which aired on 60 Minutes Feb. 8, 2015. Lesley Stahl is the correspondent. Shachar Bar-On, producer.

The recent cyber invasions of Sony studios and military Twitter feeds highlight how hacking has morphed from a commercial nuisance to a matter of national security. The man the Department of Defense has put in charge of inventing technology to fight this new Internet war is Dan Kaufman. He heads the software innovation division of DARPA - the Defense Advanced Research Projects Agency, tasked with maintaining our military technological superiority.

It makes sense that DARPA is working on this: after all, it invented the Internet. But Kaufman is an unexpected choice: he's not a general or a scientist or engineer. He's a videogamer. Call him DARPA Dan. And he says it's only right that the agency that brought us the Internet find a way to secure it.