TrueCrypt is Free open-source disk encryption software for Windows XP/2000/2003 and Linux. If you are paranoid about your data being stolen and misused, truecrypt is your friend.
Some of the important features of truecrypt are as below.
1) It can create a virtual encrypted disk within a file and mounts it as a real disk.
2) Truecrypt can encrypt an entire hard disk partition or a device, such as USB flash drive.
3) Encryption is automatic, real-time (on-the-fly) and transparent.
True crypt provides two levels of plausible deniability, in case an adversary forces you to reveal the password:
a) Hidden volume (steganography).
b) No TrueCrypt volume can be identified (volumes cannot be distinguished from random data).
True crypt can use the following encryption algorithms:
Blowfish (448-bit key),
You can download truecryypt for your preferred operating systems from
http://www.truecrypt.org/downloads. For linux hosts 32bit and 64 bit code are available . Also you can find console only code.
I down loaded truecrypt7.0a ( the latest stable version from
The downloaded file may then be untarred and unziped using
$ tar -xzvf truecrypt-7.0a-linux-x86.tar.gz
Now if you look in your directory a file named truecrypt-7.0a-setup-x86 will be present. You can install truecrypt by executing this file as follows.
$ sh truecrypt-7.0a-setup-x86
Now a window will pop up as shown below.
You can choose install truecrypt. Another screen will follow asking you to agree to the licence. If you agree, the system will ask you the password for superuser access and will install true crypt in to /usr/bin/truecrypt
You can start up truecrypt from a command prompt as below.
Truecrypt screen will pop up as shown below.
You can look at the documentation at http://www.truecrypt.org/docs/ for using truecrypt .