Facebook believes that Cambridge Analytica, the data firm at the center of the company’s recent privacy scandal, may have collected personal data from as many as 87 million Facebook users without their permission.
Were you one of them? You can now check by using this link.
All you need to do is log in to your account and the company will let you know if your data may have been part of the data set the research firm got its hands on.
As a reminder: Your data may have ended up with Cambridge Analytica even if you’ve never interacted with the firm. The data was collected via a third-party app called “This is your digital life” that was created by a university professor to collect information from people who signed into the app using their Facebook account.
But even if you never used that app, your data still could have been part of the Cambridge Analytica data set. That’s because of the way Facebook’s developer settings used to work. Facebook previously allowed developers to collect personal information from people who signed into their app with a Facebook account, but also let those developers collect data from that original user’s Facebook friends.
So Cambridge Analytica could have collected your personal information if one of your friends used the app. Facebook has since changed this policy, but it’s how developers used to collect massive amounts of data on Facebook users without their permission.
This article originally appeared on Recode.net.