Visitor ID

I think visitor’s IP, browser, session, and cookie can be visitor indentifiers.

What else do you have for visitor indetifiers ?

username and password

Yes, by confirming the username and password, we make session, cookie or session and cookie at a same time.

I like to collect some information about visitors before he/she says he/seh is him/her.

Because sessions and cookies don’t work across subdomain, I like to make a loose logIn keeping logic by combination of collected informations (IP and browser).

Thank you all the time …