<p>the hardest privacy problem with encrypted communication is at the recipient side; everything has software and hardware backdoors these days, all mobile devices come with manufacturer daemons that can screenshot if not keylog everything, and you have no control over your recipient's security practices.</p><p>matrix is the most sophisticated messaging protocol, as it's able to prevent all these issues at the root, by making it impossible for the recipient to read your messages in the first place</p>