I want to be able to encrypt a usb drive that i have with something pretty powerfull. I don't want something like 7-zip or winrar that you have to extract all the files, because a) that a really big file and b)its very slow. I don't have admin privliges on the computer, so i can't use truecrypt. Since its a usb drive, i would like to keep it on the drive, and just have an encrypted partion. Is this possible, and more importantly, is it free?