CrossCrypt 0.4.3:

Open Source AES and TwoFish Linux compatible on the fly encryption for Windows XP and Windows 2000.

CrossCrypt Features

On the fly and offline encryption of Containers CD's compatible to standard Linux systems under Win2000 / XP
Strong Encryption: Supporting /aes256 , /aes192, /aes128 (SingleKey Mode aes-loop compatible) and TwoFish (Use /2f) (160 Bit Key) (SuSE Linux compatible)
GNU GPL License comes with full source .
Denaiablity: You will not be able to tell that this file has been encrypted by filedisk as it looks completely random and can have any extension you wish.
Encrypted CD Rom support. You can mount unencrypted CD Rom iso files as well. And you can dump ISO Images form existing CD's.
Large files support theoretically more than 9.000.000 GB (dependig on your filesystem)
No backdoors there is no master key or anything else that could be used to gain access to your files

CrossCrypt Installation

Dowload the current version and unzip files to a folder of your choice and run install.bat. If you do not want that the driver is started at boot time edit filedisk.reg before running install.bat
eventually you have to reboot your system so that CrossCrypt will run

CrossCrypt Usage

Create a new encrypted container filename c:\test.img Size 400MB and AES256 encryption and mount it as drive I:
filedisk /mount c:\test.img 400M i: /t /aes256
you can format the drive for example format i: /fs:fat or /fs:ntfs
(To fully use it under linux use fat or fat32 and a min 20 Char password
If you do not specify a drive the first free drive will be taken)
Open an existing container:
filedisk /mount c:\test.img I: /aes256
if you enter password correct (and did choose the correct encryption) you will be able to access all files in drive I: otherwise you will see an error when accessing drive I: . And you have to unmount (filedisk /umount i: ) the drive again and then you will be able to remount it. (Drive is optional)
Create an encrypted CD
First you need an iso image file on your harddrive. You could use mkisofs (there is a windows port of cdrtools at http://www.sbox.tugraz.at/home/t/tplank/ you will have to download cygwin dll as well) or maybe your burning software can store an iso image to your harddrive insted of burning it to a cdrom. You can also grab an iso image form an existing cd with "filedisk /encrypt d: c:\test.iso" assuming your cd rom is in drive D:
If you have an iso image you can encrypt it using filedisk /encrypt c:\test.iso c:\test.iso /aes256
After completion burn test.iso to your cd rom.
Mounting an encrypted CD
filedisk /mount D: I: /cd /aes256
now you can access your encrypted CD as dirve I: (if you did not burn your iso image from above you can test it by simply replacing D: with c:\test.iso )
Please remeber to use the flag /cd
Unmounting a drive
filedisk /umount I:
it is much safer to /umount a drive before exitig windows than simply rebooting.
to unmount all drives use filedisk /umount
Removing encryption from a container / cd
filedisk /decrypt test.iso plain.iso /aes256
Please use a diffrent file for the plaintext because if you get password or encryption mode wrong your original will be damanged completly.
Print Status of all mounted drives
filedisk /status
Using a seperate Keyfile gnupg encrypted
If you have GnuPG installed in your system. You can use a random password on your container/cd/partition and store the encrypted keyfile in a save place like a floppy or usb stick. This has several advantages: You are using a strong random password on your container, you do not have to fear anyone can guess your passphrase. You can easily change the password of your keyfile whenever you want without reencryption of your container. You can encrypt the keyfile with your public key and the public key of all other legal users of your container/cd/partition.

1) Generate a new Keyfile:
gsk secret.key (If you want a symmetric key)
gpk secret.key (If you want the keyfile to be encrypted with one or more public keys)

2) To create a new conatiner with your secret.key
gm secret.key c:\test.img 400M (creates a new container file with size 400 Mb and mounts it as next free drive)

3) To mount an existing container with your secret key as drive I:
gm secret.key c:\test.img I:

gsk,gm,gpk are simple batch files, maybe you have to adjust the path to gpg.

CrossCrypt Dowloads Win2K / XP:

So there are absolutly no warrantys for data loss system corruption or anything else. If you loose your password or forget which encryption scheme you used there is no way to get your data back.

Sucess/Failure Reports are wellcome. please report to crosscrypt@scherrer.cc

Version 0.4.3: (beta) Includes the filedisk bug fix by Bo Brantén (Should help with big container files and low PC memory) Start download (Complete with source)
Version 0.4.1: Fixed a 0.4 bug in that mounting an encrypted Cd would fail.
Version 0.4: GnuPG support easier handling please report problems immediatly,
or use the better tested 0.3 Version,
Version 0.3: Now with install.bat and AES en/decryption ..
Version 0.2: Only TwoFish
Version 0.1: wrong compiled file has been packed please upgrade.