In my current project i have to do something like,
1. I have one site name http://www.regbundle.com/registration.aspx, on which user will register himself, along with this user MAC address [or information which is unique to his computer] will be taken automatically and saved to server.
2. On http://www.regbundle.com/download.aspx link will be provide to download some certificate on his computer and will get saved on his machine.
3. Now when user try to open site http://www.virtualG2.com, the site will open since the certificate is installed on his machine.
4. Now when the same user try to open same site http://www.virtualG2.com on other computer, it will not open the site.
How this can be done? Please provide necessary steps and code to do.