Program: TrueCrypt
License: Open Source/GPL
Description: A program that create a file that act like a new volume that is encrypted, needing a password to get access.
Website: http://www.truecrypt.org/
It already is a portable software, that can be unpacked inside a usb drive, but it needs admin rights to function. It could be nice if we could use it integrated with PortableApps and whithout needing admin rights.
thanks
As usual, made first a search on forum, as your request it's already made, see :
https://portableapps.com/node/14374