In addition to the public profile data of up to 87 million Facebook users, political data firm Cambridge Analytica also reportedly harvested people’s private messages, too (Warning: source may be paywalled; alternative source). The New York Times reports: On Monday, Facebook began informing people whose data may have been compromised by Cambridge Analytica through an app developed by the researcher Aleksandr Kogan. In its notifications, Facebook said that while the information harvested was largely limited to what was on people’s public profiles, “a small number of people” also shared information from their Facebook timeline, posts and messages. Facebook did not specify how many people’s messages were gathered and said it was taking as broad a view as possible when notifying people that their data may have been taken.

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Source: Slashdot – Facebook Data Collected By Quiz App Included Private Messages