question before I try it: can editing be restricted to a few users, or can anyone edit a basic ckeditor page?

I've set up a simple html5 website for a friend who knows nothing about html, etc.  I want him to be able to edit the page text himself (so I don't have to!), which led me to ckeditor.  I can't tell from looking at the samples or reading the documentation (not that I've read all of it), can ckeditor be restricted so that just a few users can edit the pages on which it's installed, or do I need to use a CMS with ckeditor to give it that capability?  I suppose it would need a user validation setup, like, username and password to do what I'm asking...?

THanks, sorry for the noobie question, I just don't want to dig in too deep only to find I'm looking in the wrong place.