TrueCrypt是一款免费,开源的支持Windows Vista/XP/2000 and Linux的虚拟加密磁盘工具,可以在硬盘上创建一个或多个虚拟磁盘,所有虚拟磁盘上的文件都被自动加密,需要通过密码来进行访问.
TrueCrypt提供多种加密算法,如AES-256、Blowfish(448-bitkey)、CAST5、Serpent、Triple DES等,其他特性还包括支持FAT32和NTFS分区、隐藏卷标和热键启动以及更多功能. 

February 5, 2008

      New features:

Ability to encrypt a system partition/drive (i.e. a partition/drive where Windows is installed) 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). For more information, see the chapter System Encryption in the documentation.   (Windows Vista/XP/2003)

Pipelined operations increasing read/write speed by up to 100%   (Windows)

Mac OS X version

Graphical user interface for the Linux version of TrueCrypt

XTS mode of operation, which was designed by Phillip Rogaway in 2003 and which was recently approved as the IEEE 1619 standard for cryptographic protection of data on block-oriented storage devices. XTS is faster and more secure than LRW mode (for more information on XTS mode, see the section Modes of Operation in the documentation).

 Note: New volumes created by this version of TrueCrypt can be encrypted only in XTS mode. However, volumes created by previous versions of TrueCrypt can still be mounted using this version of TrueCrypt.

SHA-512 hash algorithm (replacing SHA-1, which is no longer available when creating new volumes).

 Note: To re-encrypt the header of an existing volume with a header key derived using HMAC-SHA-512 (PRF), select 'Volumes' > 'Set Header Key Derivation Algorithm'.

      Improvements, bug fixes, and security enhancements:

The Linux version of TrueCrypt has been redesigned so that it will no longer be affected by changes to the Linux kernel (kernel upgrades/updates).

Many other minor improvements, bug fixes, and security enhancements.  (Windows and Linux)

If you are using an older version of TrueCrypt, it is strongly recommended that you upgrade to this version.

官方网站：http://www.truecrypt.org/

下载:TrueCrypt 5.0