Smack + openfire Secure ??

I finish a simple chat app using ASmack

i set

config.setSASLAuthenticationEnabled( true );

AND

config.setSecurityMode(ConnectionConfiguration.SecurityMode.enabled);

is it enough ? how secure the communication between Asmack App and the open fire server

and what   {

config.setTruststoreType("AndroidCAStore");

                              config.setTruststorePassword(null);

                              config.setTruststorePath(null);  } do ???????????

and thanks in advance