Hello and many thanks in advance to the ones who will respond.
For a personal non-profit project, I'm trying to design a PHP-MYSQL driven multiplayer game but I want to make sure that an individual won't be able to apply for the participation to the game more than once even if he has more than one computer/internet connection (thus cookie/IP detection becomes useless).
The only one solution I've found is sending a password by SMS on the applicant's cellphone in order for him to validate his application. The problem is that a reliable PHP to SMS service is costly. Also, people could own more than one cellphone or rely on friends to retrieve passwords.
Then here is the question: does someone have a better solution?
Thanks again.
Have a nice day.
For a personal non-profit project, I'm trying to design a PHP-MYSQL driven multiplayer game but I want to make sure that an individual won't be able to apply for the participation to the game more than once even if he has more than one computer/internet connection (thus cookie/IP detection becomes useless).
The only one solution I've found is sending a password by SMS on the applicant's cellphone in order for him to validate his application. The problem is that a reliable PHP to SMS service is costly. Also, people could own more than one cellphone or rely on friends to retrieve passwords.
Then here is the question: does someone have a better solution?
Thanks again.
Have a nice day.