TrueCrypt

TrueCrypt is a free and open-source disk encryption software for Windows 7 / Vista / XP, Mac OS X, and Linux.

Main features :

• Creates a virtual encrypted disk within a file and mounts it as a real disk.
• Encrypts an entire partition or storage device such as USB flash drive or hard drive.
• Encrypts a partition or drive where Windows is installed (pre-boot authentication).
• Encryption is automatic, real-time (on-the-fly) and transparent.
• Parallelization and pipelining allow data to be read and written as fast as if the drive was not encrypted.
• Encryption can be hardware-accelerated on modern processors.
• Provides plausible deniability, in case an adversary forces you to reveal the password.
• Hidden volume (steganography) and hidden operating system.

For more information about features of TrueCrypt, refer to the documentation available on a copy of the Truecrypt site (the official site is definitely inaccessible).

Since the official site is no longer available, you will need to download TrueCrypt from a third-party site :

• FileHippo for the Windows version

Other languages ​​can be downloaded on truecrypt.ch (unofficial website).
Note : language packs are currently supported only by the Windows version of TrueCrypt.

Important : the official TrueCrypt website is down.
To download TrueCrypt, you will need to go through a mirror site available at the bottom of the review. This is the version "7.1a" (the latest true version of TrueCrypt).