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<div class="moz-cite-prefix">On 12/01/2013 09:55 PM, Rick Hornsby
wrote:<br>
</div>
<blockquote
cite="mid:96420E42-375E-495E-AE91-4A61FB2137E3@gmail.com"
type="cite">
<pre wrap="">Right now we can block (and delete) browser cookies to stop being tracked across the web sites we visit. I've noticed recently a significant uptick in specific banner ads on unrelated sites (ie news) for specific products I've browsed at a shopping site like B&H. This is troubling, and while I deleted my entire cookie cache when I realized it, I'm tempted to institute a per month full cookie delete.</pre>
</blockquote>
<br>
There has been in increase in cookie use by advertisers with
cooperation from the major service providers (eg: Google). I say
"increase", but it's more about cross-site cookie coordination than
about the total number of cookies.<br>
<br>
In English: they're actively tracking you for better targeting of
the ads which pay for the services.<br>
<br>
<blockquote
cite="mid:96420E42-375E-495E-AE91-4A61FB2137E3@gmail.com"
type="cite">
<pre wrap="">We can't reliably be tracked (or track our own customers, should we wish to) over time by our IPv4 address both because of NATs, and because of DHCP. I'm not sure I've heard this yet in this discussion thread, but I have this distinct impression that an IPv6 address is more or less static, because it is based on the hardware address of the NIC? If so, that would negate any efforts to delete tracking cookies.</pre>
</blockquote>
<br>
NAT doesn't save you from the cookie monster.<br>
<br>
IPv6 addresses are not necessarily static. The point of IPv6 is to
restore end-to-end uniqueness which the Internet once enjoyed. That
does raise your individual visibility, but is not a tracking risk of
the kind you report.<br>
<br>
IPv6 addresses are not necessarily tied to the hardware address of
the NIC. The link local address shows up automagically and is
derived from the MAC addr (in the NIC at that time), but it is not
routed beyond the local LAN segment. Routable IPv6 addresses are
independent of the MAC addr.<br>
<br>
I am assuming DHCPv6 or other means aside from the autoconfig. Best
practice is to use DHCPv6 or manual and <b>not</b> use autoconfig.<br>
<br>
If your objective is to not be tracked, it goes beyond just your
address (4 or 6). If you don't want to be tracked, you can use Tor
or some VPN or hide in a torrent. But you've still got to kill the
cookies.<br>
<br>
-- R; <><<br>
<br>
<br>
<br>
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