We know that the NSA has been monitoring millions of calls made in the United States. But what are they doing with that data? And how do they analyze it? Find out everything you need to know in this incredible lecture from Princeton computer science professor and government technology adviser Ed Felten.
Right now, downtown San Francisco is teeming with people attending RSA, the world's biggest conference devoted to "cybersecurity." But up the street, there's another tech conference. It's full of computer security analysts who want to stop the surveillance state. It's called Trustycon, and you can watch it here, live.