I've used DriveCrypt Plus Pack and DriveCrypt standard before, but I don't recall the standard edition having invisible capability as it's non-OS. From their website http://www.securstar.com/products_drivecrypt.php 5. Invisible Containers (DriveCrypt standard edition only) The DriveCrypt Standard edition has the ability to create an INVISIBLE disk INSIDE a container or partition. This way you define two passwords for a container. The invisible disks password gives you access to your working disk, which is hidden in the unused area of your "outer" disk, while another password gives you access to the pre-setup DriveCrypt volume in which you only store data that you would want others to believe is the only data in the container or partition. This is very useful in cases where an aggressor may force you to reveal the DriveCrypt disk's password: By revealing the password of the first or "outer" disk, the aggressor will ONLY see the "prepared data": IE data you put in there, before creating the hidden disk, while he will not be able to see or get evidence that there is another invisible container that securely stores confidential data on the disk. Would like to know your experiences and views. Thanks.