Well... Im building with someone a system, which will let people buy pages (information and guides) by sending a simple SMS. This system will contain a mini users registration system (without a password, only usernames), and the surfers in my system will be able to create a user in thier own computer, but not to log-in thier user in another computer (that's, acually, why i don't need a password). I can't allow my surfers to log-in in thier own user in more than 1 computer because of 1 simple reason: If I'll do that they'll just give thier user details to thier friends or for people they're know...I got 1 problem: Let's say I'm a surfer in this system, I created a user, and bought 2 pages by SMS, now I simply closed my computer, and when I opened it, my IP has been changed. Now, I can't see the pages I've just bought one day ago, and that's not exactly what I want, as surfer, or as manger!Cookies could help, but the surfers always can just send the cookies to thier friends or something... I can't allow that kind of thing, Ill just lose money if ill use cookiesI want to implement one of the following ideas:
Make the surfers don't want to give people thier user details somehow
Recognize a computer, but not with its IP ('cuz then the IP will simply change)...
Is there a possible way in PHP to solve my problem? maybe a way to save data in computers, so the users won't be able to change/delete/copy it? or maybe recognize computers by thier hostnames or something? sincerely, Tal.