TrueCrypt 4.3a

TrueCrypt is free open-source disk encryption software.
Main features:
- It can create a virtual encrypted disk within a file and mount it as a real disk.
- It can encrypt an entire hard disk partition or a device, such as USB memory stick, floppy disk, etc.
- Provides two levels of plausible deniability, in case an adversary forces you to reveal the password:
- 1) Hidden volume (more information may be found here).
- 2) No TrueCrypt volume can be identified (TrueCrypt volumes cannot be distinguished from random data).
- Encryption algorithms: AES-256, Blowfish (448-bit key), CAST5, Serpent (256-bit key), Triple DES, and Twofish (256-bit key). Supports cascading (e.g., AES-Twofish-Serpent).
- Based on Encryption for the Masses (E4M) 2.02a, which was conceived in 1997.
Enhancements:
- Access rights are now elevated using sudo.
- Volumes can be dismounted only by the user who mounted it or by root.
- Support for writing data to file-hosted volumes located on devices that use a sector size other than 512 bytes (e.g. new HDD types, DVD-RAM, some flash drives) was added.
- A TrueCrypt volume is now automatically dismounted if its host device is inadvertently removed.
- The maximum allowed size of FAT32 volumes was increased to 2 TB.
- Support for big-endian platforms was improved. 64-bit block ciphers are being phased out; such volumes can still be mounted, but not created.