TrueCrypt – Free Open-Source Disk Encryption Software

Cryptography

TrueCrypt

TrueCrypt is a software system for establishing and maintaining an on-the-fly-encrypted volume (data storage device). On-the-fly encryption means that data are automatically encrypted or decrypted right before they are loaded or saved, without any user intervention. No data stored on an encrypted volume can be read (decrypted) without using the correct password/keyfile(s) or correct encryption keys. Entire file system is encrypted (e.g., file names, folder names, contents of every file, free space, meta data, etc).

Files can be copied to and from a mounted TrueCrypt volume just like they are copied to/from any normal disk (for example, by simple drag-and-drop operations). Files are automatically being decrypted on-the-fly (in memory/RAM) while they are being read or copied from an encrypted TrueCrypt volume. Similarly, files that are being written or copied to the TrueCrypt volume are automatically being encrypted on-the-fly (right before they are written to the disk) in RAM. Note that this does not mean that the whole file that is to be encrypted/decrypted must be stored in RAM before it can be encrypted/decrypted. There are no extra memory (RAM) requirements for TrueCrypt. For an illustration of how this is accomplished, see the following paragraph.

New features :
* Ability to encrypt a non-system partition without losing existing data on the partition. (Windows Vista/2008)Note: To encrypt a non-system partition in place, click ‘Create Volume‘ > ‘Encrypt a non-system partition‘ > ‘Standard volume‘ > ‘Select Device‘ > ‘Encrypt partition in place‘ and then follow the instructions in the wizard. Please note that this is not supported on Windows XP/2000/2003 as these versions of Windows do not natively support shrinking of a filesystem (the filesystem needs to be shrunk to make space for the volume header and backup header).
* Support for security tokens and smart cards (for more information, see section Security Tokens and Smart Cards in chapter Keyfiles).
* The TrueCrypt boot loader can be prevented from displaying any texts (by selecting Settings > System Encryption and enabling the option ‘Do not show any texts in the pre-boot authentication screen’).
* The TrueCrypt boot loader can now display a custom message (select Settings > System Encryption and enter the message in the corresponding field) either without any other texts or along with the standard TrueCrypt boot loader texts.
* Pre-boot authentication passwords can now be cached in the driver memory, which allows them to be used for mounting of non-system TrueCrypt volumes (select Settings > System Encryption and enable the option ‘Cache pre-boot authentication password‘).
* Linux and Mac OS X versions: The ability to mount a Windows system partition encrypted by TrueCrypt and to mount a partition located on a Windows system drive that is fully encrypted by a Windows version of TrueCrypt.

Latest Stable Version – 6.1a

Download :
http://www.truecrypt.org/downloads.php

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