So yet another &quot;end to end encrypted&quot; email &quot;solution&quot;, where both ends are controlled by a single vendor.<p>There are already two, count them, TWO, existing, open, well-understood ways to both sign and encrypt email between two parties: PGP, and S&#x2F;MIME.<p>Currently, the UX around setting up and using each of these tools is.. less than stellar.<p>Now. Just go with me here. What if all the people who keep claiming to have &quot;solved the encryption problem&quot; by locking everyone into their own little silo, instead of doing that, WORKED ON SOLVING THE USABILITY PROBLEMS?