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Ending the Web Privacy Stalemate - DoNotTrack.Us

The web privacy debate is stuck. Privacy proponents decry the diffusion of behavioral advertising and tracking services (1, 2, 3); industry coalitions respond by expounding the merits of personalized content and advertising revenue (1, 2). But for the average user, the arguments are academic: there is no viable technology for opting out of web tracking. A registry of tracking services, like privacy advocates proposed years ago, is cumbersome and unmanageable. Fiddling with cookies, as many advertising networks and anti-regulation advocates recommend, is an incomplete and temporary fix; both Google and NAI (an advertising industry association) have already moved away from opt-out cookies.

Do Not Track ends this standoff. It provides a web tracking opt-out that is user-friendly, effective, and completely interoperable with the existing web. The technology is simple: whenever your web browser makes a request, it includes an opt-out preference. It's then up to advertisers and tracking services to honor that preference – voluntarily, by industry self-regulation, or by law.

Arvind Narayanan and I have been researching Do Not Track for several months, and are pleased to now introduce DoNotTrack.Us, a compilation of what we've learned. The resource explains Do Not Track, provides prototype implementations, and answers some common questions. We'll be updating it in the coming months with new findings and responses to feedback.

Excited as we are about the Do Not Track technology, it is but a first step. Important substantive policy questions remain open: What tracking should be impermissible? When a user visits a site, what constitutes a third party? We look forward to collaborating with advertising networks, NGO's, regulators, lawmakers, and other stakeholders in answering these crucial questions.

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