FreeOTFE Explorer logo FreeOTFE Explorer
Free disk encryption software for PCs and PDAs
(PDA version of WWW site)

Introduction

This software allows FreeOTFE (and Linux) encrypted volumes to be mounted on MS Windows PCs, and their contents accessed (both reading and writing) via a Windows Explorer-style user interface.

Unlike all other disk encryption systems, FreeOTFE Explorer does not need any device drivers to be installed on the computer it is run on, making it perfect for use with USB drives (and other removable media), where volumes need to be accessed on PCs where FreeOTFE hasn't been installed, and administrator rights are not available to the user in order to start FreeOTFE in "portable mode". For example, in Internet Cafés (AKA Cybercafés), where PCs are available for use, but only as a "standard" user.

FreeOTFE Explorer is fully compatible with both FreeOTFE and FreeOTFE4PDA volumes, and runs on for MS Windows 2000/XP/Vista/Windows 7 PCs (both 32 and 64 bit)


Features

  • Driverless operation - making it ideal for carrying your data securely on USB drives or other removable media. (No administrator rights are required to carry out initial installation or start portably - unlike all other forms of disk encryption.)
  • Fully compatibile with FreeOTFE on-the-fly disk encryption
  • Source code freely available
  • No installation needed
  • 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 many commercial!) OTFE systems
  • Available in English, German, Italian, French and Spanish, with support for other language translations
  • Hash algorithms include: MD5, SHA-512, RIPEMD-320, 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 XTS, LRW and CBC (including XTS-AES-128 and XTS-AES-256)
  • Security tokens/smartcards supported for extra (optional) security
  • Linux compatibility (Cryptoloop "losetup", dm-crypt and LUKS supported)
  • "Hidden" volumes may be concealed within other encrypted volumes, providing "plausible deniability"
  • Encrypted 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
  • 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.
  • Volume file timestamps and attributes are reset after dismounting, increasing "plausible deniability"
  • Supports volumes files up to 2^63 bytes (8388608 TB)
  • Comprehensive documentation
  • Plus more...!
Screenshots of FreeOTFE Explorer are available

Cyphers included:

Cypher
Key length (in bits) Block Length (in bits)
Modes
Source Library
Comments
AES 128 128 CBC/XTS Dr. Brian R. Gladman XTS version aka XTS-AES-128
AES 192 128 CBC/XTS Dr. Brian R. Gladman
AES 256 128 CBC/XTS Dr. Brian R. Gladman XTS version aka XTS-AES-256
AES 128 128 CBC/LRW/XTS LibTomCrypt XTS version aka XTS-AES-128
AES 192 128 CBC/LRW/XTS LibTomCrypt
AES 256 128 CBC/LRW/XTS LibTomCrypt XTS version aka XTS-AES-256
Blowfish 128 64 CBC LibTomCrypt
Blowfish 160 64 CBC LibTomCrypt
Blowfish 192 64 CBC LibTomCrypt
Blowfish 256 64 CBC LibTomCrypt
Blowfish 448 64 CBC LibTomCrypt
CAST5 128 64 CBC LibTomCrypt aka CAST-128
CAST6 128 128 CBC Dr. Brian R. Gladman aka CAST-256
CAST6 160 128 CBC Dr. Brian R. Gladman aka CAST-256
CAST6 192 128 CBC Dr. Brian R. Gladman aka CAST-256
CAST6 224 128 CBC Dr. Brian R. Gladman aka CAST-256
CAST6 256 128 CBC Dr. Brian R. Gladman aka CAST-256
DES 64 64 CBC LibTomCrypt
3DES 192 64 CBC LibTomCrypt Standard encrypt, decrypt, encrypt
MARS 128 128 CBC/XTS Dr. Brian R. Gladman
MARS 192 128 CBC/XTS Dr. Brian R. Gladman
MARS 256 128 CBC/XTS Dr. Brian R. Gladman
Null 0 (variable) n/a n/a
RC-6 128 128 CBC/XTS Dr. Brian R. Gladman
RC-6 192 128 CBC/XTS Dr. Brian R. Gladman
RC-6 256 128 CBC/XTS Dr. Brian R. Gladman
RC-6 128 128 CBC/LRW/XTS LibTomCrypt
RC-6 192 128 CBC/LRW/XTS LibTomCrypt
RC-6 256 128 CBC/LRW/XTS LibTomCrypt
RC-6 1024 128 CBC/LRW/XTS LibTomCrypt
Serpent 128 128 CBC/XTS Dr. Brian R. Gladman
Serpent 192 128 CBC/XTS Dr. Brian R. Gladman
Serpent 256 128 CBC/XTS Dr. Brian R. Gladman
Twofish 128 128 CBC/XTS Dr. Brian R. Gladman
Twofish 192 128 CBC/XTS Dr. Brian R. Gladman
Twofish 256 128 CBC/XTS Dr. Brian R. Gladman
Twofish 128 128 CBC Hi/fn and Counterpane Systems x86 systems only
Twofish 192 128 CBC Hi/fn and Counterpane Systemsx86 systems only
Twofish 256 128 CBC Hi/fn and Counterpane Systemsx86 systems only
Twofish 128 128 CBC/LRW/XTS LibTomCrypt
Twofish 192 128 CBC/LRW/XTS LibTomCrypt
Twofish 256 128 CBC/LRW/XTS LibTomCrypt
XOR (variable) (variable) n/a n/a

Hash algorithms included:

Hash
Hash Length (in bits)
Block Length (in bits)
Source Library
MD2 128 128 LibTomCrypt
MD4 128 512 LibTomCrypt
MD5 128 512 LibTomCrypt
Null (variable) (variable) n/a
RIPEMD-128 128 512 LibTomCrypt
RIPEMD-160 160 512 LibTomCrypt
RIPEMD-160 (Linux; Twice, with A) 320 512 LibTomCrypt
RIPEMD-256 256 512 LibTomCrypt
RIPEMD-320 320 512 LibTomCrypt
SHA-1 160 512 LibTomCrypt
SHA-224 224 512 LibTomCrypt
SHA-256 256 512 LibTomCrypt
SHA-384 384 1024 LibTomCrypt
SHA-512 512 1024 LibTomCrypt
Tiger 192 512 LibTomCrypt
Whirlpool 512 512 LibTomCrypt