Sort of. You can create a disk image on your external drive with Disk Utility, and set it to be encrypted (you'll see the Encryption pull-down when you go to create one). You can then use that image as you would any ordinary disk.
Sort of. You can create a disk image on your external drive with Disk Utility, and set it to be encrypted (you'll see the Encryption pull-down when you go to create one). You can then use that image as you would any ordinary disk.