ECLYPT 600 drives (Core 600, freedom 600 & nano 600) require a password and user token ( having 2 factor authentication).
ECLYPT 200 drives are more flexible and can authenticate in any of these 3 ways:
Password and Token for 2 factor authentication.
For further information about token setup just email email@example.com
Disclaimer: This blog is written by Robert Palmer, an employee of ViaSat UK Ltd, but the views and opinions expressed on this website are those of the author, and do not necessarily represent the views and opinions of ViaSat