Edward Snowden himself, the former National Security Agency (NSA) systems administrator who leaked classified records of NSA surveillance efforts, called in from Moscow via Google Hangouts for a live, unscripted Q&A with security expert Bruce Schneier, a fellow at Harvard Law School’s Berkman Center for Internet and Society, drawing a large audience in the Science Center.

Their conversation centered on the technological changes that have rendered once-secure systems vulnerable.

via Reengineering privacy, post-Snowden | Harvard School of Engineering and Applied Sciences.