Easy login script without database

Question

How do I create an easy login script that does not require a database. I would like it to be safe.

Alright, what about this script, i just made it by my knowledge in

Answer 1

FacebookConnect or OpenID are two great options.

Basically, your users login to other sites they are already members of (Facebook, or Google), and then you get confirmation from that site telling you the user is trustworthy - start a session, and they're logged in. No database needed (unless you want to associate more data to their account).