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When you are not behind a NAT, an IP can uniquely identify a device which, in turn, can, most likely, uniquely identify its owner.


If you have 2^48 IP addresses (like anyone with a free ipv6 tunnel does), you can assign your device a new IP address every day for 771164319755 years.


Aren't most providers going to be handing out /64's? I know Comcast is working on that at the moment!




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