http://www.truecrypt.org/Open-source free on-the-fly disk encryption for Windows XP/2000. It can encrypt partitions or create virtual encrypted disks within files. Implemented ciphers: AES-256, Blowfish (448-bit key), 3DES, Serpent, Twofish. Provides plausible deniability.TrueCrypt is free open-source disk encryption software for Windows Vista/XP, Mac OS X and Linux.
Free open-source disk encryption software for Windows Vista/XP , Mac OS X, and Linux
Creates a virtual encrypted disk within a file and mounts
Encrypts an entire partition or
storage device such as USB flash drive or hard drive .
Encrypts a partition or drive where Windows is installed (
allowencryptionsecurityEncryption
Professional task manager which allows for automatically performing various security-related tasks, such as automatic encryption, wiping, and system cleanup.