I think you can get the GUID without the web page going insecure in the browser. Think that's what poll/voting-pages normally use.

It's even better than the MAC, you can change NIC without the GUID changing hehe

In ASP.NET you have this:
http://msdn2.microsoft.com/en-us/library...ionsection.aspx

Edited by masken (2006-10-09 09:48 AM)