Secure voice communication on Android

While the topic of secure voice communication on mobile is hardly new, it has been getting a lot of media attention following the the official release of the Blackphone, Consequently, this is a good time to go back to basics and look into how secure voice communication is typically implemented. While this post focuses on Android, most of the discussion applies to other platforms too, with only the mobile clients presented being Android specific.

more here................http://nelenkov.blogspot.com/2014/07/secure-voice-communication-on-android.html