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Blog22 Signal 2.0: Private messaging comes to the iPhoneToday were releasing Signal 2.0, with support for TextSecure private messaging.It is now possible to send end-to-end encrypted group, text, picture, and video messages between Signal on iPhone and TextSecure on Android, all without SMS and MMS fees. Signal 2.0 blends private phone calls and private messaging into a single frictionless interface, allowing you to focus on whats important by quickly organizing your conversations using an inbox/archive work flow.Privacy is possible, Signal makes it easySignal uses your existing phone number and address book. There are no separate logins, usernames, passwords, or PINs to manage or lose.We cannot hear your conversations or see your messages, and no one else can either. Everything in Signal is always end-to-end encrypted, and painstakingly engineered in order to keep your communication safe.Signal has been designed for the mobile environment from the ground up. Messages and incoming calls are fully asynchronous; push notifications let you know when new messages have arrived, so theyll be waiting for you if the app is in the background, your battery dies, or you temporarily lose service.Speak freely with integrated private callingMake crystal-clear private phone calls to people who live across town, or across the ocean, with no long-distance charges.View sourceAll of our code is free, open source, and available on GitHub. This allows experts to verify our protocols and our cryptography.Signal development is the result of hard work from Frederic Jacobs, Christine Corbett, and Tyler Reinhard, with big thanks for all the pull requests that came in from the community along the way.Like everything we do at Open Whisper Systems, dedicated development is supported by community donations