Ensuring one vote per person

[Showjumper]

I have built a rating server control. Whats the best way to ensure one vote
per person? Check IP Addresses and allow 1 vote per IP address or via
cookies?

Thanks
Ashok

 

[Shawn Wildermuth (C# MVP)]

Hello Showjumper" dfgkjhdf,

IP Address doesn't work because of proxy servers. I have to say that e-mail
address is the only way I can imagine it workign well.


Thanks,
Shawn Wildermuth
Speaker, Author and C# MVP
http://adoguy.com

 

[Steve C. Orr [MVP, MCSD]]

IP addresses cannot be relied upon to be unique because of proxy server &
such.
The only reasonable way to be sure is to create an authentication system.
People sign up, get a user name and password, then they log in and vote.

 

[Showjumper]

Okay Thanks Shawn and Steve

IP addresses cannot be relied upon to be unique because of proxy server &
such.
The only reasonable way to be sure is to create an authentication system.
People sign up, get a user name and password, then they log in and vote.

 

[Showjumper]

How is MSDN handling it? At the end of the articles, one can vote and if you
try to vote twice a popup appears.

 

[Ray Booysen]

Pretty sure they are just setting a cookie to do that.

 

[Ken Cox [Microsoft MVP]]

Some sites pass a cookie once you vote. Of course if you erase the cookie,
you could vote again so it isn't reliable.