“This HowTo is about creating a user-session-safe directory which offers security on- and offline. This is done with PAM, a module named pam_script and Encfs (‘Encrypted Filesystem’). This safe directory is used to store credentials and other sensitive information during a session. When a usersession is ended, in the worst case an encrypted directory remains on the harddrive. In the best case everything is removed. This construction is only meant to store information during a session, not for documents or any other valid information.”
and is very good , no problems
i followed this guide to encrypt some parts of home dir (.thunderbird .gaim .ssh)
http://security.linux.com/article.pl?sid=06/03/13/1656228&tid=35