Product Key Creating

[SouthSpawn]

I am creating a web application. I would like to create a product key for
the app that expires after a full year of usage. Any suggestions?

Thanks,
Mark

 

[William Stacey [MVP]]

This should give you some ideas.
http://www.thecodeproject.com/dotnet/xmldsiglic.asp
If you have other ideas or questions after reading, please post back.