&quot;Fomer CEO of company that installs backdoors, 
critizes company that refuses to install backdoors.&quot;<p>Proprietary Back Doors
Here are examples of demonstrated back doors in proprietary software.
<a href="http:&#x2F;&#x2F;www.gnu.org&#x2F;proprietary&#x2F;proprietary-back-doors.en.html" rel="nofollow">http:&#x2F;&#x2F;www.gnu.org&#x2F;proprietary&#x2F;proprietary-back-doors.en.htm...</a>