TrueCrypt 6.1a

Free open-source disk encryption software for Windows Vista/XP, Mac OS X, and Linux

 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.

• Provides two levels of plausible deniability, in case an adversary forces you to reveal the password:

1) Hidden volume (steganography – more information may be found here).

2) No TrueCrypt volume can be identified (volumes cannot be distinguished from random data).

• Encryption algorithms: AES-256, Serpent, and Twofish. Mode of operation: XTS.

• Further information regarding features of the software may be found in the documentation