Mark Zuckerberg responds to the Cambridge Analytica scandal

After being conspicuously silent for most of the week, Facebook CEO Mark Zuckerberg has finally posted a lengthy response to the Cambridge Analytica scandal on his personal Facebook page.

Zuckerberg pledged to investigate “all apps that had access to large amounts of information” before Facebook changed its policy in 2014 and more actively control the kind of data access available to developers.

Zuckerberg spends the first part of his response explaining what happened: a researcher named Aleksandr Kogan developed a personality quiz app for Facebook. About 300,000 users from the United States installed Kogan’s app and consented to have their personal data harvested. But the app also amassed the personal data of these users’ friends, none of whom consented to do so.

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