HOWTO: Encrypt The System Manually Upon Installation (Ubuntu 8.04) - Page 3
Step 5: Creating the "/home" folder
Afterwards we end in the main partitioning menu again. Select the free space:
Make a new partition:
Use all the remaining disk space for your home folder. That's where you normally want to store most of your data.
Set the properties according to the picture however you can change encryption, key size and algorithm according to your preferences. Make sure the encryption key is a passphrase.
Step 6: Configure the encrypted devices
Afterwards we end in the main partitioning menu again. Select the encrypted volumes:
Select here yes:
Then enter the password for the root device (partition #3 sda):
Verify the password for the root device:
If your password is too weak you will get this error message. Either go back and fix it or accept it. However a weak password defeats the purpose of having encryption. I only selected yes, because it's a demo setup on a virtual machine. So once I'm done it gets deleted anyway.
Then enter the password for the home device (partition #4 sda):
Verify the password for the home device:
Again the weak password message: