I wouldn't even use TrueCrypt. It's non-free and not open source and legally dangerous, as explained in https://fedoraproject.org/wiki/ForbiddenItems#TrueCrypt and http://lists.freedesktop.org/archive...er/000276.html. Also see the Wikipedia article about it.

We have much better encryption solutions, on the block level and on the file level (e.g. using ecryptfs).