TrueCrypt – freeware encryption program
When it comes to storing sensitive files on your hard drive, it's a great idea to make sure that it is protected. Freeware is the ultimate freeware encryption program that you can download for free to help protect your data. The software contains 11 algorithms to help protect your private files and ensure that they are safe. TrueCrypt creates encrypted volumes including 256-bit AES and 448 bit Blowfish.
Truecrypt is also great when it comes to protecting your data on mobile devices. It can work on security tokens as well as smart cards as well.