Disk encryption software that encrypts data “on-the-fly”

If you are worried about losing your valuable data TrueCrypt could help. TrueCrypt is an open-source disk encryption software that encrypts data “on-the-fly”. You can create an encrypted hard drive, a separate partition or a directory. Among the features are : creates encrypted hard drive and mounts it; encrypts an entire drive; selected partition/directory and even USB flash drive; encryption is automatic, on-the-fly and transparent for user; there is no way to check the size of the encrypted partition/directory; uses such encryption algorithms as : AES-256, Serpent, Twofish; enables the creation of a hidden volume; while in use you can’t distinguish between the created volume and common data; the virtual drives created with TrueCrypt are completely independent of the operating system, and authorization keys can be held on a USB stick. There are three ways to secure the encrypted data: with a password, with a special key, with both a password and a key. TrueCrypt 4.3a (released May 3, 2007), a free open-source disk encryption software for Windows Vista/XP/2000 and Linux, can be downloaded at http://www.truecrypt.org. TrueCrypt needs a tool called dmsetup to work correctly. Dmsetup is a tool enabling you to work with logical drives mapped with the device-mapper driver. The newest version of dmsetup is available on http://sources.redhat.com/dm/