PHP Poll's and other IP logging Programs

Poll's or other programs that log ips as their main source against double votes or the like only give those behind a router one chance. Only 1 computer behind that router can take the poll. For example the codewalkers poll. I took it on one computer in the den, but i was unable to take it on my laptop in my room. So what are the alternatives to IP logging that are just as useful but not as intrusive.

Well, you can use cookies, but those can be modified. If you have logins, thats the best way, just log in what users have voted. But that doesn't work well if you allow anonymous votes..... There really is no foolproof way to prevent double voting, but cookies wont' block out entire routers

trying a reverse cooking thing gives slightly better results... instead of using a cookie to signify that they HAVE voted already... use one to signify then CAN vote... and after the vote remove the can vote flag from the cookie... that way someone can't just turn cookies off and vote several times... they would have to have cookies on in the first place to receive that 'can vote' signal in their cookie... and they would then have to manually edit their cookies' values in order to vote again... this would at least take more effort than the other way around... but doesn't really take care of the problem at hand

hey ednark that is a very smart way of doing it. although it won't work as perfect as people would like it to be done (what way is there of doing it foolproof). i must say that you way might be one of the better ways of controlling votes on the web.

I'm not quite sure if humor will go over well here, but here's a stab at it anyway:

1) Gain access to Social Security (or country based ID) records
2) When you vote, you must type your social security number, birthdate, and various other information that is stored on the national level.
3) Very, very small chance of vote duplication.

The problem with this is people can still just wipe their cookies and they will get a new CAN vote cookie.

In fact, they don't even have to wipe the cookies by theirselves. When they vote, the canvote cookie is automatically destroyed, and then a new one is given. This system simply can't work without extra stuff. And with extra stuff it will get too complicated.