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News Link • Technology: Software

Verizon's 'Perma-Cookie' Is a Privacy-Killing Machine

• http://www.wired.com

The company—one the country's largest wireless carriers, providing cell phone service for about 123 million subscribers—calls this a Unique Identifier Header, or UIDH. It's a kind of short-term serial number that advertisers can use to identify you on the web, and it's the lynchpin of the company's internet advertising program. But critics say that it's also a reckless misuse of Verizon's power as an internet service provider—something 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 shouldn't 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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