Description:
FreeOTFE4PDA is a free, open source, "on-the-fly" (OTFE) transparent disk encryption program.
Using this software, you can create one or more "virtual memory cards" on your PDA - anything written to which will be automatically, and securely, encrypted before being stored.
Features include:
- Source code freely available.
- Easy to use; full wizard included for creating new volumes.
- 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.
- "Hidden" volumes may be concealed within other FreeOTFE volumes, providing "plausible deniability".
- Encrypted volumes have no "signature" to allow them to be identified as such.
- Modular design allowing 3rd party drivers to be created, incorporating new hash/cypher algorithms.
- Supports password salting (up to 512 bits), reducing the risks presented by dictionary attacks.
- 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".
- Plus more...!
A PC version is also available, allowing data encrypted on your PC to be read/written on your PDA, and vice versa.
Other Download links:
For CAB file installation package, please download here (1.19 MB) or its mirror here.
For Binary files as ZIP archive, please download here (627 KB) or its mirror here.
Update Description:
v3.00.00 (16-12-2007):
- FreeOTFE4PDA is now available as single .CAB file and ActiveSync installer, as well as a standard .ZIP file, which making installation to a PDA even simpler.
- Added LRW and XTS cypher mode support.
- Tested under Windows Mobile 6 (note: earlier versions should also work with this OS).
- Added option to revert volume file timestamps/attributes to their pre-mount values on dismounting.
- Optimised order of cypher/hash details returned from drivers to improve time to mount on PDA version.
- Updated LibTomCrypt based cypher/hash drivers to use LibTomCrypt v1.17.
v2.11.00 (29-06-2007):
- Added "\" prefix to mountpoint passed to configured explorer application when exploring mounted volumes in order to better support 3rd party software (e.g. Resco Explorer).
- Added automatic refresh of FreeOTFE's display if already running when a volume is mounted via the commandline/tapping on a ".vol" file.
- Updated to correct minor bug preventing commandline options from mounting correctly if no mountpoint is supplied on the commandline.
v2.10.00 (27-05-2007):
- Added (optional) support for Windows Mobile 5.0 softkeys.
- Documentation layout revamped.
- Added link to user guide from "Help" menu.
- Made it clearer to the user at which point they can create their new volume, and which advanced/optional steps.
v2.00.00 (18-03-2007):
- Added option to change the default mountpoint, or default it based on the volume's filename. Mount dialog "mountpoint" control moved to "Advanced" tab on mount dialog.
- Added option to specify a different "File explorer" application.
- Added option to associate FreeOTFE4PDA with volume files.
- Added context menu option to explore mounted volumes, in addition to existing doubletap explore.
- Added option to backup and restore the CDB from volumes with a CDB.
- Added option to dump critical data block to a human readable file.
- Added command line support.
- Added OS version ID to human readable CDB dumps.
- Moved weaker drivers (FreeOTFE4PDAHashNull.dll, FreeOTFE4PDACypherNull.dll and FreeOTFE4PDACypherXOR.dll) into a "weak drivers" directory; most users shouldn't use these drivers, but they're still included in the release if needed.
v0.55.00 Beta (04-12-2006):
- Corrected error preventing volumes encrypted with the XOR and NULL encryption drivers operating properly.
- Corrected problem with opening files on some PDAs.
- Redundant drivers moved into separate directory.
- Added further information to documentation wrt redundant drivers/speeding up the time taken to mount.
- Added stats report for drivers (developer use only).
- FreeOTFE4PDACypherTwofish_HifnCS.dll driver removed from PDA binary distribution (driver fails to init correctly). Note: Existing volumes can still be mounted and used with the remaining two Twofish implementations.
v0.50.00 Beta (11-11-2006):
- First public release.
