Originally Posted by b3machi7ke
It's a good and valid point to be made. It seems a better idea (not sure how feasible it is) would be to have MAC address filtering. Again, you could buy a used computer that has been banned from sites so there's still a gray area there, but MAC address is somewhat more difficult (I believe) to spoof, especially for a large number of machines. I dunno, I'm not the most tech-savvy person in the world, but that seems to be a viable alternative to IP blocks...
MAC address filter is irrelevant past the first hop.
There's mac address cloning built into routers and there's mac address changers.
I remember my aunt wanted a bunch of Benjamin Moore paint coupons from a coupon site (coupons.com
? I think) and that used a printer plugin that used SID (or HDD serial) or something to that effect. That
would be tough to pull off. IIRC it doesn't change even when sandboxed / VMed/ under a NAT and was a pain the butt because it didn't allow printing to PDF on PCs without printers.
Apparently for Windows there's a way to get unique serial using WMI http://support.microsoft.com/kb/558124
On Ivy Bridge and Haswell there's supposedly "identity theft solutions" http://ipt.intel.com/Home/How-it-works/network-security-identity-management/ipt-with-pki
You could probably also use the product key for Windows itself ,with the caveat of Entrerprise systems using the same OS Key.
The above is why you don't want to use Windows for anything you need to keep private...
* edited for Ecstacy's post
The coupon printer ($5 off coupons per container and she needed to paint a whole 25' x 100' house... so you do the math) acted rootkit like: it used Windows dlls and such to pick up a unique ID (guessing the SID) which it then sent to a remote server before it generates the unique bar code for the coupon. If you have used Nuance PDF , cutepdf,or PDFcreator (which is now malware infested if you install with default settings) you will know that you can print to PDF but this checked to make sure it was a physical printer as well. If you printed more than 3 coupons off the computer it would not let you print anymore (even if your printer jammed). You couldn't photocopy the coupons either.
Also see an overview of the previous incarnation of the printer http://slickdeals.net/forums/showpost.php?p=36080303&postcount=23Edited by AlphaC - 8/21/13 at 3:11pm