I use a portable USB drive (Seagate FreeAgent Go Flex) to keep all my personal stuff, and though the HDD company does offer a password scheme to control access to it, that would work only on windows, as one could easily mount it in Linux and bypass it.
I'm looking for a solution that would encrypt the entire drive, making it impossible to read/write anything without knowing the password. Does anyone know of any security tools (open-source would be the best !!) that would enforce this regardless of the OS being used to mount the HDD ? If not, what alternatives would you suggest to safeguard the data ?