How to encrypt all files on your hard drive in Linux and Windows
This article will introduce you to a free, open-source software called TrueCrypt, which encrypts files on your hard drive. This software can be used on Linux, MacOS, Windows XP, Windows Vista, and Windows 2003/2008. TrueCrypt encrypts/decrypts all file names, directory names, file contents, etc on your hard drive in memory (RAM), without any user intervention. Because the encryption/decryption is done on-the-fly in RAM, you will not experience a noticeable performance degradation. TrueCrypt is a mature product which a large user-base and support forum. Below are some useful links:
