FreeOTFE is a free, open source software designed to provide you "on-the-fly" transparent disk encryption for PCs and PDAs.

Using this software, you can create one or more "virtual disks" on your PC/PDA. These disks operate exactly like a normal disk, with the exception that anything written to one of them is transparently, and securely, encrypted before being stored on your computer's hard drive.

Here are some key features of "Portable FreeOTFE":

· Source code freely available
· Easy to use; full wizard included for creating new volumes
· Data encrypted on your PC can be read/written on your PDA, and vice versa
· Powerful: Supports numerous hash/encryption algorithms, and provides a greater level of flexibility than a number of other (including commercial!) OTFE systems
· Hash algorithms include: MD5, SHA-512, RIPEMD-160, Tiger and many more
· Cyphers include AES (256 bit), Twofish (256 bit), Blowfish (448 bit), Serpent (256 bit) and many more
· Cypher modes supported include CBC, LRW and XTS (including XTS-AES-128 and XTS-AES-256)
· Portable mode" included; FreeOTFE doesn't need to be installed before it can be used - making it ideal for carrying your data securely on USB drives!
· Operates under both PC (MS Windows 2000/XP) and PDA (Windows Mobile 2003/2005 and Windows Mobile 6) platforms
· Linux compatibility (Cryptoloop "losetup", dm-crypt and LUKS supported)
· Hidden" volumes may be concealed within other FreeOTFE volumes, providing "plausible deniability"
· FreeOTFE volumes have no "signature" to allow them to be identified as such
· Encrypted volumes can be either file or partition based.
· Modular design allowing 3rd party drivers to be created, incorporating new hash/cypher algorithms
· Decryption software available to improve transparency, and allow even the most junior software engineer to prove data is being encrypted correctly
· Supports password salting (up to 512 bits), reducing the risks presented by dictionary attacks.
· Allows users to backup and restore the critical areas of volume files.
· Keyfile support included; store volumes and their associated metadata separately.
· Uses per-sector IVs, including support for ESSIV
· Volume file timestamps and attributes are reset after dismounting, increasing "plausible deniability"
· Supports volumes files up to 2^63 bytes (8388608 TB)
· Fully supported by SecureTrayUtil.

What's New in This Release: [ read full changelog ]

· Spanish translation added.
· Added support for Windows 7. Added "/saltlength" and "/keyiterations" command line options.
· Added additional check on salt length when creating new volumes.
· Added option to volume creation wizard to mount new volumes after creating them.
· Added autodetect functionality for