6 Ways Law Enforcement Can Track Terrorists in an Encrypted World | MIT Technology Review, 24 November 2015

Nathan Freitas leads the Guardian Project, an open-source mobile security software project, and directs technology strategy and training at the Tibet Action Institute. His work at the Berkman Center focuses on tracking the legality and prosecution risks for mobile security app users and developers worldwide.

Source: 6 Ways Law Enforcement Can Track Terrorists in an Encrypted World | MIT Technology Review