Facebook revealed today that Cambridge Analytica accessed the personal information of more than 87 million users, and not 50 million, as it was initially reported.
More than 70 million, 80% of the total tally, are Americans, the social network revealed in a chart breaking down users per country (image above).
Facebook plans to notify all of the 87 million affected users on Monday, April 9, with a message that would appear at the top of their Facebook timeline.
The social network also plans to show an additional message that will ask all users, not just the affected 87 million, to review the apps that have access to their Facebook data.
To account for lazy users that dismiss these messages, Facebook also said it would automatically cut an app's access to user data if the user hasn't used the app for the last three months.
Besides warnings for users, Facebook also announced today other changes, including:
Facebook has taken these steps to fight abusive apps like the one developed by an academic for Cambridge Analytica. Named "This Is Your Digital Life," this quiz app used a loophole in Facebook's app permissions model to gather information on over 87 million users, even if only 270,000 users used the app. This happened because, at the time, Facebook allowed apps to collect data on a user's friends, not just the user who installed the app.
Most privacy and security experts believe malicious actors have already mapped out most of Facebook's userbase already, and Facebook's recent updates are only to appease angry users who had their data scraped by an analytics company that later weaponized it for political targeting and propaganda.