/home on separate partition & encryption

[Douglas S. Saylor]

   I'm starting to think I want to have files a separate /home
partition. I'm trying to sort the + & - of this set-up. Then there's the
question of encryption. Questions: 1) how can this be done without
reinstalling 11.04? 2) with this encryption, is it the "bullet-proof"
type kinda thing even the govt can't crack, or is that something less
than that?