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Facebook has been told to stop its practice of indefinitely retaining data about which adverts its 500 million users outside the US click on, following a review by the Irish data protection commissioner of its non-US operations.
It has also agreed to take immediate steps over data collected from third-party sites when people use their Facebook identity to log in to them. Until now, that data about people's behaviour was passed back to Facebook and retained indefinitely. Following the review, Facebook can keep the data but it has to make it anonymous – for example it can share how many people clicked on an add but can't provide details of specific users – within 10 days and completely delete the data after 90.
joined:Oct 29, 2011