Forget piracy: BitTorrent is turning its attention to privacy. The company on Tuesday officially released Bleep, a new mobile messaging app that purports to keep user information private. It's been in development for some time, and Android and Mac users have been able to access an alpha version since last fall. But the latest update brings the app to iOS and significantly overhauls that initial build. When you register for Bleep, you only need to input a nickname.