Many complain that open source softwares are not good. They don’t have the features of the pro softwares. But I don’t agree with this. There are softwares which surpass their pro competitors. And TruCrypt is one of them. This open-source encryption program is loaded with powerful encryption features, but a lack of in-program help may dissuade all but those users who definitely need or want to completely secure their data. You have to rely on the help available at their website. I hope they come out with one soon.
This Little software allows to protect your sensitive data with disk encryption. Creates a virtual encrypted disk within a file and mount it as a real disk. Encrypt an entire hard disk partition or a device, such as USB flash drive. Automatically and transparently encrypt in real time. TrueCrypt uses encryption algorithms AES-256, Blowfish (448-bit key), CAST5, Serpent, Triple DES, and Twofish. It is based on Encryption for the Masses (E4M) 2.02a, conceived in 1997. Yeah thats too much technical stuff. Don’t bother to read this. The thing you need to know is yor data is secure from all.
In version 5.0 TrueCrypt offers the ability to encrypt a system partition/drive (i.e. a partition/drive where Windows is installed which mostly C:) with pre-boot authentication. Anyone who wants to gain access and use the system, read and write files, etc., needs to enter the correct password each time before the system starts.
Download it here