I have a requirement to encrypt the whole of my boot drive and my mobile Time Machine backup drive that I shall be taking with me on travels. I know I can use FileVault, which will give me an encrypted disk image but I don't like the reliability of sparse images and need the whole of the boot drive to be encrypted. I have tried Truecrypt to encrypt the TM disk, but could not get Time Machine to see it. I've been looking at the Checkpoint Full Disk Encryption product. Anyone any experience with this? What I'm trying to find out is if I can encrypt a USB HD with it, but seem to be going round in loops between CHeckpoint and resellers.