HOWTO use realcrypt to create an encrypted container or partition on your DICE computer's local disk, or an external USB drive.

  • Realcrypt can be used on your own desktop DICE computer to create an encrypted container on the local disk or to encrypt an entire device, such as a USB drive. Some initial setup must be performed by computing staff, so the first step is to fill in a support request form asking for this to be done. Realcrypt on DICE is tied to a combination of your DICE username and the DICE computer allocated to you. A USB drive encrypted using realcrypt will only be usable by you on your DICE computer, or on a Windows PC/laptop with truecrypt (the Windows version of realcrypt) installed, providing you have administrator access.

  • In a shell, enter the command realcrypt and the initial screen will pop up. Click 'create volume':
    initial.png

  • The wizard will appear (as if by magic?) If you want to encrypt a file container go to this page , but in this case we'll go for an encrypted USB drive - select appropriately and click 'next':
    Screenshot-RealCrypt_Volume_Creation_Wizard.png

  • Keeping it straightforward, select 'standard realcrypt volume' and click 'next':
    Screenshot-RealCrypt_Volume_Creation_Wizard-1.png

  • Make sure your USB drive is connected and click 'select device':
    volume_location.png

  • Highlight your chosen device and click 'ok':
    Screenshot-Select_a_Partition_or_Device.png

  • Check the volume location is correct and click 'next':
    Screenshot-RealCrypt_Volume_Creation_Wizard-7.png

  • Read the warning, and if you're happy you want to proceed, you guessed it, click 'yes':
    Screenshot-RealCrypt.png

  • Enter your DICE password and click 'OK':
    Screenshot-Administrator_privileges_required.png

  • Choose your favourite encryption and hash algorithms and click 'next':
    Screenshot-RealCrypt_Volume_Creation_Wizard-2.png

  • Set your encryption password and choose to use keyfiles or not. These selections only apply to the volume you are creating. Click 'next':
    Screenshot-RealCrypt_Volume_Creation_Wizard-3.png

  • Select whether you're going to store large files or not, click 'next':
    Screenshot-RealCrypt_Volume_Creation_Wizard-4.png

  • Choose your filesystem options. FAT is default and most portable between DICE and Windows. Click 'next':
    Screenshot-RealCrypt_Volume_Creation_Wizard-5.png

  • Follow the instructions to move your mouse randomly. When you get bored, click 'format':
    Screenshot-RealCrypt_Volume_Creation_Wizard-6.png

  • Read the warning, and if you're happy you want to proceed, click 'yes':
    Screenshot-RealCrypt-2.png

  • There will then be a short delay as your USB drive is encrypted before you see this. Click 'ok' and exit realcrypt:
    success.png

  • To use your encrypted USB drive, start up realcrypt again and click 'Auto-mount Devices':
    automount.png

  • Enter the volume password you set for the USB drive, click 'ok':
    real_vol_pass.png

  • Your encrypted USB drive will appear in the box, with a path to its mount directory, in this case /media/realcrypt12:
    mounted.png

  • That's it ready for use like any other folder. When you're done, click 'dismount' and exit realcrypt:
    ready.png

  • There is also a command line version, realcrypt --help should tell you all you need to know and more.

-- RichardBell - 27 Apr 2012

Topic revision: r1 - 27 Apr 2012 - 13:33:38 - RichardBell
 
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