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Netflix Sued For Privacy Invasion 262

We've discussed the Netflix Prize numerous times as the contest ran, including the news two years ago that the anonymity of the dataset had been broken. Now reader azoblue sends in this excerpt from Wired: "An in-the-closet lesbian mother is suing Netflix for privacy invasion, alleging the movie rental company made it possible for her to be outed when it disclosed insufficiently anonymous information about nearly half-a-million customers as part of its $1 million contest to improve its recommendation system. ... The lead attorney on the new suit, Joseph Malley, recently reached a multimillion-dollar settlement with Facebook over its failed Beacon program, which drew fire in part for sharing users’ Blockbuster rentals with their friends. ... If a data set reveals a person's ZIP code, birthdate and gender, there's an 87 percent chance that the person can be uniquely identified." The suit turns on the question of whether Netflix should have known that their dataset's anonymity could be broken, two years before researchers demonstrated that.
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Netflix Sued For Privacy Invasion

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Numeric stability is probably not all that important when you're guessing.