Retrieving user information on isapi

2007-04-20 04:08:44 PM
I have an isapi application and need to allow usage permissions based on
specific clients on specific computers. Meaning I need to know some unique
info of the client computer, so to give only specific user the right
permission and not be transferable.
Usually with my desktop products I use various information such as
user/system name, HD serial# etc to determine the user allowances. But with
the isapi I can only use whatever I can get from the browser. IP address is
no good enough as it changes each time for most users.
What other unique information can I retrieve and how?