Can I do password protection for iweb on comcast

I am trying to keep my website private from random "google" type searches. I have used IWeb to publish my website on my comcast file storage site. Works great but my children complain that random searches for their names produce their pictures on my website. Can i keep our information private and does password protection keep people from finding my site and looking at the pictures. I see that you can password protect on Moble me sight but can you password protect on iweb itself?