I would have thought these companies would just grab the devices unique MAC address.
The only way around it for the majority of network devices is to change the hardware (network card).
Some systems allow you to change the MAC address.
Every time a user visits your website, you have there IP Address, (which for most users is dynamic),
and then you simply use that to get the MAC Address via ARP Cache, then check to see if you already have the MAC address in you database of visitors.
Why pay some douchebag for a few lines of code to add to your webserver that you can write yourself?
Thanks for informing us at ATS. S&F
edit on 9-12-2010 by CitizenNum287119327 because: (no reason given)



