Password Protecting LILO:

You can configure LILO to ask for a password before booting every operating system or kernel on the system by adding a password directive in the globally. To do this, open a terminal, log in as root, and edit /etc/lilo.conf. Before the first image stanza, add a password directive similar to this:

password=password

In the above directive, replace the word password with your password.

So LILO provide plain text password's compared to GRUB's MD5 password protection