Free truecrypt software for linux

TrueCrypt is free open-source disk encryption software.
Main features:
- It can create a virtual encrypted disk within a file and mount it as a real disk.
- It can encrypt an entire hard disk partition or a device, such as USB memory stick, floppy disk, etc.
- Provides two levels of plausible deniability, in case an adversary forces you to reveal the password:
- 1) Hidden volume (more information may be found here).
- 2) No TrueCrypt volume can be identified (TrueCrypt volumes cannot be distinguished from random data).
- Encryption algorithms: AES-256, Blowfish (448-bit key), CAST5, Serpent (256-bit key), Triple DES, and Twofish (256-bit key). Supports cascading (e.g., AES-Twofish-Serpent).
- Based on Encryption for the Masses (E4M) 2.02a, which was conceived in 1997.
Enhancements:
- Access rights are now elevated using sudo.
- Volumes can be dismounted only by the user who mounted it or by root.
- Support for writing data to file-hosted volumes located on devices that use a sector size other than 512 bytes (e.g. new HDD types, DVD-RAM, some flash drives) was added.
- A TrueCrypt volume is now automatically dismounted if its host device is inadvertently removed.
- The maximum allowed size of FAT32 volumes was increased to 2 TB.
- Support for big-endian platforms was improved. 64-bit block ciphers are being phased out; such volumes can still be mounted, but not created.

OneKript is a Front-End for the program of disk encryption "on the flye" TrueCrypt, released under license GPL.
It has been developed with the environment Kommander for KDE (to have the kommander-executor is necessary to start OneKript.). At the moment is available the version 0.5.1.
Main features:
- Creation of normal and hidden volumes.
- Selection of the file system type, size and algorithms of hash and encryption.
- Double introduction of password.
- It allows to use keyfiles and random sources
- Mount and unmount of volumes with capacity for read only and protection of hidden volumes.
Enhancements:
New:
- view volume properties
- keyfiles creations
- test internal algorithms
- overwrite option.
Changed:
- new gui design
- improvement of the detection of erroneous fields system
- elimination (almost) complete of the use of konsole

pam_mount is a Pluggable Authentication Module that can mount volumes for a user session.
This module is aimed at environments with SMB (Samba or Windows NT) or NCP (Netware or Mars-NWE) servers that Unix users wish to access transparently. It facilitates access to private volumes of these types well.
The module also supports mounting home directories using loopback encrypted filesystems. The module was originally written for use on the GNU/Linux operating system but has since been modified to work on several flavors of BSD.
- Every user can access his own volumes
- The user needs to type the password just once (at login)
- The mounting process is transparent to the users
- There is no need to keep the login passwords in any additional file
- The volumes are unmounted upon logout, so it saves system resources, avoiding the need of listing every every possibly useful remote volume in /etc/fstab or in an automount/supermount config file. This is also necessary for securing encrypted filesystems.
pam_mount "understands" SMB, NCP, and any type of filesystem that can be mounted using the standard mount command. If someone has a particular need for a different filesystem, feel free to ask me to include it and send me patches.
If you intend to use pam_mount to protect volumes on your computer using an encrypted filesystem system, please know that there are many other issues you need to consider in order to protect your data.
For example, you probably want to disable or encrypt your swap partition (the cryptoswap can help you do this). Dont assume a system is secure without carefully considering potential threats.
Enhancements:
- pam_mount now uses an XML config file, which also has a few new variables and options.
- Support for truecrypt was added.