OTR keys

doc/EN/usage.org

@@ -192,7 +192,7 @@ Click *close* and then *connect*.
 
 ** XMPP/Jabber
 *** Using with Profanity
-The [[http://profanity.im][Profanity]] shell based user interface and is perhaps the simplest way to use XMPP from a laptop.
+The [[http://profanity.im][Profanity]] shell based user interface and is perhaps the simplest way to use XMPP from a laptop. It's also a good way to ensure that your [[between different devices ][OTR keys]] are the same even when logging in from different laptops or devices, and it also means that if those devices later become compomised then there are no locally stored OTR keys to be found.
 
 #+BEGIN_SRC bash
 ssh username@domain -p 2222