TrueCrypt - Encryption Tools (Freeware)

Real-Time File EncryptionTrueCrypt is an open-source encryption software that enables you to create a virtual encrypted disk within a file and mount it as a virtual drive, that can be accessed via a drive letter. Any file that is stored on this virtual drive is automatically encrypted on-the-fly, and can only be accessed while the drive is mounted with the correct password or key.TrueCrypt supports a variety of encryption algorithms, including AES-256, Blowfish (448-bit key), CAST5, Serpent, Triple DES, and Twofish. Other features include support for FAT32 or NTFS formatting, hidden volumes, hotkeys for mounting/dismounting and more.TrueCrypt can be installed on a portable drive unless you want to encrypt your system partitions.

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