End-to-end (E2E) code needs to be open source and venders that don't agree to an audit should be considered insecure; holds true for What's App, which declined to allow their E2E code to be audited.
Also, message metadata is still being leaked by all of these E2E implementations and needs to be fixed.
Also, message metadata is still being leaked by all of these E2E implementations and needs to be fixed.