Since sending photos and audio to mobile is not really safe, the application also encrypts each byte of data via Signal's secure messaging application. If that's still not enough, users can change the phone's settings to run with Orobot, turning the phone into a TOR Onion Service.
You can read more about Haven here https://guardianproject.github.io/haven/ or download the Haven Beta version here https://play.google.com/store/apps/details?id=org.havenapp. main
Haven is an open source project and Snowden also hopes programmers can review, contribute, edit according to their own use.
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