Secure remember me function?

[eluser]Adam Griffiths[/eluser]
I am building it for my CMS, which is already fairly secure and should stay that way. The last thing I want is some script kiddie with a cookie stealer to come and get access to the admin account and deface my website, or worse, my clients website.

If I code a function I will also add it to my Auth library, which would be good for the community.