You could use Truecrypt traveller mode to encrypt your data on a USB stick but in order to use Truecrypt on a computer you will need administration rights and this is not possible in public computers like Internet cafe and libraries. Rohos Mini Drive USB encryptrion doesn’t require administrative privileges to open your password protected USB thumbdrive partition on a guest PC.
Rohos Mini Drive uses on the fly encryption making sure no data is left unencrypted on the guest PC after you have finished viewing it, there is a secure virtual keyboard included to stop key-loggers capturing your password and data is encrypted using AES256 a well known secure algorithm approved by the US Department of Defense to encrypt secret information.
There is a feature called ‘Hide and Encrypt Folder’ that allows to encrypt profile folders of applications like Skype, Google Chrome and Firefox as well as regular PC folders. This feature locks applications data with a password and ciphers the content strong encryption, when your encrypted USB drive is not plugged in to PC the applications will be unable to start.
This encryption software needs less than 1MB for stand alone installation and creates an encrypted .rdi file where to store your data, it includes Rohos Disk Browser to view and manage your encrypted files, this is very useful as it will help you to avoid using the guest computer Windows explorer and stop you from leaving temporary files behind.
The free version of Roho Mini Drive has a 2GB encrypted partition size limitation, you will need administration rights to preinstall Rohos Mini Drive on the USB flash drive first and after that this secure encrypted USB thumbdrive can be used anywhere without any admin privileges.
The company behind Rohos Mini Drive claims that there is no backdoor whatsoever, if you lose your password, that is it, that also means that nobody can force the company to decrypt data held in your USB thumb drive because they have no way of doing it.