Verizon’s ‘Perma-Cookie’ Is a Privacy-Killing Machine (My ATT phone doing it too!)
Verizon Wireless has been subtly altering the web traffic of its wireless customers for the past two years, inserting a string of about 50 letters, numbers, and characters into data flowing between these customers and the websites they visit.
The companyone the countrys largest wireless carriers, providing cell phone service for about 123 million subscriberscalls this a Unique Identifier Header, or UIDH. Its a kind of short-term serial number that advertisers can use to identify you on the web, and its the lynchpin of the companys internet advertising program. But critics say that its also a reckless misuse of Verizons power as an internet service providersomething that could be used as a trump card to obviate established privacy tools such as private browsing sessions or do not track features.
Jacob Hoffman-Andrews, a technologist with the Electronic Frontier Foundation, wants Verizon to stop using the UIDH. ISPs are trusted connectors of users and they shouldnt be modifying our traffic on its way to the Internet, he says. He calls the UIDH a perma-cookie, because it can be read by any web server that you visit and used to build a profile of your internet habits.
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http://www.wired.com/2014/10/verizons-perma-cookie/
Note: I used the "sniffer" test, found at this website:
http://lessonslearned.org/sniff
You have to log in with your phone -- with WiFi off (just using the cell signal)
It turns out my non-Verizon phone is doing the same thing...