How to recognize returning visitors not using cookies?
This is the problem: i do not want people can cheat the game so i need to identify and recognize each single visitor in unique way. Normal cookies are not a solution since they can be easily deleted.
What could i to recognize an user in a stealth way so he cannot easily delete the cookies and play multiple times to my game?
I cannot register the ip in the database because many ISP in my country uses the same ip for multiple users so i would block many users if i ban an ip.
Is there a way to install a stealth cookie not easy to be deleted or something like that?
Maybe flash cookies or java cookies??
There is nothing that will perfectly do what you want. The closest you can get is requiring registration with something "unique" like an email address, but of course someone could just create multiple addresses.