TL:DR; Create encrypted USB Stick with embedded autoplay module.
Create encrypted USB Sticks. Every encrypted usb stick contains AutoPlay module. You just need to connect the encrypted usb flash drive to the computer and enter password to work with it.
Encrypt4all is a powerful encryption software used to store your private documents into a single encrypted archive, implements a real bit-per-bit data encryption.
Password Recovery Bundle 2007 is a powerful All-in-one password recovery tool, capable of instantly cracking and recovering over 20 different types of passwords. It is designed as easy to use as possible. All passwords are recovered instantly.
USB Secure can password protect any portable media including USB drives, External drives and even memory cards. It supports plug and play and automatic execution. No admin rights or install required on the other computer.