[nly]

If your ISP really wants to provide customer/household level tracking to advertisers/partners, they could easily provide an API to them like getCustomerId(IPAddress, Timestamp).

It's not entirely clear from the article whether it's "Set-Cookie" being injected in to replies, or the "Cookie" header in to requests, or both.

Interesting times nonetheless.

[yclept]

It is an http header: X-UIDH added to http requests

[andymurd]

It occurs to me that a mischievous person could easily write a Firefox plugin to (over)write that header with random garbage. If enough people used the plugin, it would render Verizon's data useless.

[clort]

except that the ISP is adding this header. They could (or do already?) just replace your header with their own..

[yclept]

Yep, and Verizon does. They will overwrite your header.