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We are looking to create a website that displays information to all new visitors to a site, i.e. welcome, please read our help guide, etc.
The big problem is that our website is not allowed to use long-lasting cookies (i.e. over 20 minutes). Does anybody know of any way we can determine whether a user has visited the site before or not. As another restriction, we can not add anyform of registration to the system.
The application is being created in ASP.Net 3.5.
Thanks for the help
The EFF has a tool/site that you can visit that shows how with the plugins, OS details, browser details, etc. you can determine a visit fairly uniquely. It could give some insight on details to store in a database to determine if the user had been there before:
https://panopticlick.eff.org/
You could attempt to use an IP address, but with NAT’ing and most ISPs handing out dynamic IP addresses anyways, you’ll never really know if the user visiting is one who’s been there before or not with any certainty.