Not too long ago, I wrote about TrueCrypt, an open source disk . To some, it may be cryptic to get TrueCrypt to use, much more integrate into your daily workflow. To make it easier, EasyCrypt, was released. EasyCrypt is "a Graphical GUI of the simplest nature for the Security Command Line product TrueCrypt."
To get started, you need to get the application by adding the source to your repositories.
then fire up apt-get
And that is it! You now have a full GUI front-end for TrueCrypt.