I was wondering how to encrypt my *external HDD* so that my data would be safe AND accessible from any OS platform (Windows and Linux). So I went through many posts and forums and found out the best thing was to use true crypt. I went along with [this post](https://askubuntu.com/questions/18751/how-to-encrypt-external-hard-drive-to-be-readable-on-any-os) and encrypt my USB drive. When inserted that, Windows didn't recognize it. Then I followed another post that said to install truecrypt.

The thing is :

1. How can i use **traveler disk setup** in Ubuntu (Option not found)?
2. Install truecrypt in USB so that i can \*mount my USB or HDD on any other OS?
3. If there is no solution for the upper two, then is there any other software which I can use to encrypt an USB device so that it can be accessed from any OS?