I need a device to transport data securely between machines - from PC to Mac or Mac to PC, or between 2 PCs. Problem is, I don't have admin rights on any of the PCs. I also don't want to leave unencrypted copies of the files on the PCs.

Preferably, I would want various forms of software on PC or Mac to read and write to the drive transparently after the passphrase is entered.

Will a hardware encrypted flash drive do this? or will it want to set up something on the PC requiring admin rights?

Can anyone suggest a good, relatively cheap device?

-Dan