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Privacy and Deanonymization #
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See also Identity resolution.

It is hard to protect privacy by simply anonymizing data. There are many de-anonymization techniques using Machine learning. How about Social networks?

There was a link prediction challenge and a team won it by deanonymizing the dataset^1

Guardian reported that NSA has been collecting the phone records of Verizon customers^2

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^1: http://www.kaggle.com/blog/2011/01/15/how-we-did-it-the-winners-of-the-ijcnn-social-network-challenge/ ; De-anonymizing Social Networks by Arvind Narayanan and Vitaly Shmatikov ; http://33bits.org/2011/03/09/link-prediction-by-de-anonymization-how-we-won-the-kaggle-social-network-challenge/

^2: "NSA collecting phone records of millions of Verizon customers daily". Guardian. 5 June 2013. http://www.guardian.co.uk/world/2013/jun/06/nsa-phone-records-verizon-court-order.

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