LibreCrypt: Open-Source disk encryption for Windows

The latest version of this document can be found at the LibreCrypt project site

Introduction

LibreCrypt: An Open-Source "on-the-fly" transparent disk encryption program for MS Windows 2000/Vista/Windows 7 PCs (both 32 and 64 bit)

This software can create "virtual disks" on your computer - anything written to these disks is automatically encrypted before being stored on your computer's hard drive.

• Source code freely available
• Easy to use
• Linux compatibility (Cryptoloop "losetup", dm-crypt and LUKS supported)
• Powerful: Supports more hash and encryption algorithms than any other transparent encryption system
• Available in English, Spanish, German, Italian, French, Czech, Japanese, Croatian, Greek and Russian - with support for other language translations
• Supports the modern recommended cypher algorithms such as AES and XTS
• Operates under MS Windows 2000/Vista/Windows 7 platforms
• "Portable mode" included; LibreCrypt doesn't need to be installed before it can be used - making it ideal for carrying your data securely on USB drives!
• "Hidden" containers may be concealed within other containers, providing "plausible deniability"

Technical details

• 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
• containers have no "signature" to allow them to be identified as such
• Encrypted containers 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.
• 'keyfiles' allow multiple users to share a container without sharing keyphrases and support key backup.
• Container file timestamps and attributes are reset after closing, increasing "plausible deniability"
• containers up to 8,388,608 TB

Screenshots of LibreCrypt are here

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 Systems	x86 systems only
Twofish	256	128	CBC	Hi/fn and Counterpane Systems	x86 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