I agree, cookies or any other temp files can be deleted anytime and changing IP is also easy... Ppl with dial-up just resets the connection and ppl with router can use almost unlimited amount of proxy servers.
Some evil person can even make a script that will use Tor to change IP after every vote (and I hope I don't need to say that using application to vote will not keep any cookies :) ) 2010/2/24 Jamie Fraser <[email protected]> > How does Digg.com do it? How does Stackoverflow do it? How does reddit do > it? Wait, you mean they ALL use membership systems? > > Stop trying to reinvent the wheel! > > If you want to ensure that people can only vote once, regardless of whether > they change IP or delete cookies, there is only one way to do it. A > membership system. > > > On Wed, Feb 24, 2010 at 10:09 AM, Kadir Avcı <[email protected]> wrote: > >> I know the exact solution is membership but we don't want membership. We >> want everyone can access the system. >> >> Kadir Avcı >> Software Developer | Web Developer >> web: www.kad1r.com | twitter: www.twitter.com/kad1r | mobile: >> +90.555.676.97.93 >> >> >> On Wed, Feb 24, 2010 at 12:03 PM, Jamie Fraser <[email protected]>wrote: >> >>> The simple solution - use a membership system. It works for 99% of sites >>> out there for providing customised content. >>> >>> >>> On Wed, Feb 24, 2010 at 7:39 AM, Kadir Avcı <[email protected]> wrote: >>> >>>> Hmm. Ok. Thanks for help. >>>> Kadir Avcı >>>> Software Developer | Web Developer >>>> web: www.kad1r.com | twitter: www.twitter.com/kad1r | mobile: >>>> +90.555.676.97.93 >>>> >>>> >>>> On Wed, Feb 24, 2010 at 6:11 AM, Keidrick Pettaway <[email protected] >>>> > wrote: >>>> >>>>> I don't think you can do anything if they are using a NATed IP >>>>> >>>>> Keidrick Pettaway >>>>> Web: >>>>> http://www.kpettaway.com >>>>> Linkedin: >>>>> http://www.linkedin.com/pub/keidrick-pettaway/8/705/b58 >>>>> ------------------------------ >>>>> *From: * Arsalan Tamiz <[email protected]> >>>>> *Date: *Wed, 24 Feb 2010 09:07:36 +0500 >>>>> *To: *<[email protected]> >>>>> *Subject: *Re: [DotNetDevelopment] [Question]Point system in asp.net >>>>> >>>>> Even there can be multiple users behind a single IP. I think this is >>>>> NOT possible to detect the same user without using any previously saved >>>>> data >>>>> on the same PC. >>>>> >>>>> On Mon, Feb 22, 2010 at 3:07 PM, Kadir Avcı <[email protected]>wrote: >>>>> >>>>>> I have a website and I want to choose best website in my webpage with >>>>>> pointing system. Users give some points to websites. >>>>>> I check IP + Cookie but if the user delete cookie or change IP address >>>>>> again give some points. How can I prevent this? >>>>>> PS: There is no membership. >>>>>> >>>>>> >>>>>> Kadir Avcı >>>>>> Software Developer | Web Developer >>>>>> web: www.kad1r.com | twitter: www.twitter.com/kad1r | mobile: >>>>>> +90.555.676.97.93 >>>>>> >>>>> >>>>> >>>> >>> >> >
