This encrypted messaging app could be a nightmare for the NSA

The NSA has made its dislike of encryption abundantly clear, something made even clearer last week when the agency’s director called for companies to allow the government to insert backdoors into their communications software. With that in mind, I imagine the NSA is going to absolutely loath Signal, a new messaging app that makes it easy for users to send encrypted pictures, text messages, and videos to almost anyone with a smartphone.