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Re: Single use Only

by Fengor (Pilgrim)
on Jan 02, 2002 at 19:21 UTC ( #135684=note: print w/replies, xml ) Need Help??


in reply to Avoiding multiple voting

to put it blankly: It cannot be done (at least i can't imagine a way of ensuring everyone can only vote once in an anonymous vote).

There are several approaches u could try nonetheless:

  • IP-Adresses: You can try to remember every IP-Adress that has already voted. But keep in mind, that firewalls masq IP's so that from outside a LAN with some hundred computers looks like one. Another thing are dial-up user which get assigned a new IP whenever they dial up
  • Cookies: You can set cookies and try to identify those who already have voted. But as you pointed out yourself people can delete cookies
  • Session Management: With SM you can ensure that someone can only vote once per session. But as soon as someone starts a new session he can vote again.
The fact is that to get accurate votes you need an information which is unique and on which the user has no influence. If it's a vote for registered user only you could use something like a user id. Every registerd user has one and he can't change it.

hth
-fen

--
"WHAT CAN THE HARVEST HOPE FOR IF NOT THE CARE OF THE REAPER MAN"
-- Terry Pratchett, "Reaper Man"

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[holli]: exactly, moritz
[moritz]: with a big table of redirects to support the old links
[LanX]: do it
[holli]: well if you put some cleverness into the migration you can auto convert most of the links as well
[LanX]: Let's Make PerlMonks Great Again!
[holli]: but you know what? i don't think i'd fancy that. I like PM as it is.
[holli]: Alone the chatterbox and everybody writes his own cb client tradition
[LanX]: there was a guy who tried to steal the concept and build an own monastery ...
[LanX]: yeah PM is very emacsy ;-)
[LanX]: I think tobyink was on a good track with his redesign, pitty the pmdevs/gods didn't try to continue the approach of a modern responsive design

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