Everyone has files that they don’t want other to see. It may be a document consisting of all your login passwords, your bank account information or the romance photos/videos (oops…) that you want to keep out of your wife/husband’s sight. In case you are wondering how to encrypt the files/folders/entire hard drive and keep it safe from prying eyes, here is an easy method.
TrueCrypt is a free open-source disk encryption software for Windows Vista/XP, Mac OS X, and Linux. What it does is to create a virtual encrypted disk within a file and mounts it as a real disk. You can use it to
- encrypt files with sensitive content
- encrypt an entire partition or storage device such as USB flash drive or hard drive
- encrypt a partition or drive where Windows is installed. This will prevent people from booting up your laptop in the event that it is stolen.
In this tutorial, I will illustrate the installation and configuration of TrueCrypt on a Linux machine (to be exact, Ubuntu Gutsy). The procedure will be the same for Windows and Mac OSX.
Download TrueCrypt from http://www.truecrypt.org/downloads.php. Choose your installer format. Since I am using Ubuntu, I selected Ubuntu – x86 (.deb) from the Linux dropdown box.
Save the tar file to your home folder. Extract it using Archive Manager. You should find a truecrypt_5.1a-0_i386.deb file inside the extracted folder.
Double click to install the application.
Open up the terminal (Application -> Accessories -> Terminal), type
The main window will pop up.
Create a new file volume
Press ‘Create Volume‘ to open up a new window.
Check the button beside “Create a standard TrueCrypt volume“. If you do not want your file volume to be visible, select “Create a hidden TrueCrypt volume“. Click Next.
In the next window, select the location of the file volume. If the file does not exists, TrueCrypt will create it for you. To encrypt your USB drive, click “Select Device” and point the path to your USB drive.
Specify the file size of the volume. This will determine how much data you can store in the volume. For illustration purpose, I only created a 1 GB file volume.
The next step is to create your password. Make sure you choose a strong password that consists of upper case, lower case, number and special characters. TrueCrypt allows you to enter up to 64 characters for your password.
For additional protection, you may want to use a keyfile together with your password. A keyfile is a file whose content is combined with a password. Until you key in the correct password and specified the correct keyfile, you won’t be able to mount the encrypted file.
You can use any kind of files as your keyfiles (mp3, jpg, zip or avi) and there is no limitation to how many keyfiles you can use. If you specify a folder, all the files inside the folder will be used as the keyfiles. (Beware: do not lose the keyfiles or modify the header. If TrueCrypt cannot authenticate the keyfile content, you will lose all your encrypted data)
Choose your file format. You only have a choice: FAT format. Click next.
This is the part where you create the encryption key. Inside the window, move your mouse as randomly as possible. The longer you move, the stronger is the encryption. When you are done, click on the ‘Format‘ button to create the file volume.
When it is done, you should see the “Volume Created” dialog box. Click ‘Exit‘
Mounting and adding files to the volume
Back to the main window, click on the slot 1. In the bottom of the window, under the Volume section, click on the “Select File” and load the filepath to your file volume.
Click ‘Mount‘. You will be asked to provide authentication.
Now open up your Nautilus, you should see your file volume mounted. You can start transferring your files into the volume.
When you are done, click on the ‘Dismount‘ button to dismount the volume.
Click ‘Exit‘ to close the TrueCrypt window. Note that this does not close down TrueCrypt entirely. To end the session, right click the TrueCrypt icon on the top system bar and select ‘Exit‘.
For easy access to TrueCrypt, you might want to create a launcher on your desktop. Right click your desktop and select “Create Launcher“. Fill in the detail as shown in the screenshot below and click ‘OK‘. You can now see the launcher on your desktop.