Before you respond, "Disk Utility can already do that," please know I don't want disk utility to do it. I'm looking for a program that can take a USB drive (used for a backup of my mac) and encrypt it so it cannot be accessed (written to or read) without a password. Particularly, one that encrypts the data multiple times. While I don't want to debate the merits of disk utility or go in depth into why I don't want disk utility to do it, please recognize I'm looking for a reliable, secure, third party software. Particularly, one that can encrypt the USB without formatting it. (Part of the problem with disk utility is that the USB file format must be FAT, but disk utility apparently will only encrypt HSF+.) I can't find any third party software besides TrueCrypt, which I understand is now a dead project and people recommend to tear clear for security purposes. Recommendations are appreciated.