Between 2013 and 2015, Aleksandr Kogan and his company Global Science Research operated the Facebook app “This Is Your Digital Life.” Although roughly 270,000 people downloaded it for a purported academic survey, Facebook’s Open Graph system also allowed the app to collect information about users’ friends. Facebook later estimated that data from potentially more than 87 million profiles—about 70.6 million in the United States—was exposed, including public profiles, birthdays, locations, page likes, and other information. Cambridge Analytica, an SCL Group affiliate, obtained the data and used it to build psychological profiles for political advertising, including work for Ted Cruz’s 2016 campaign and Donald Trump’s campaign.
Former Cambridge Analytica employee Christopher Wylie disclosed the misuse publicly in March 2018 through reporting by The Guardian and The New York Times. Facebook CEO Mark Zuckerberg testified before Congress on April 10, 2018, while the company faced investigations and lawsuits. The UK Information Commissioner’s Office fined Facebook £500,000 in October 2019, the maximum then permitted, after finding it had failed to safeguard users’ information. In July 2019, the U.S. Federal Trade Commission approved a $5 billion settlement over Facebook’s privacy violations and imposed a 20-year oversight order; the SEC separately announced a $100 million settlement over allegedly misleading investor disclosures. Cambridge Analytica filed for bankruptcy in May 2018, and the scandal intensified scrutiny of political microtargeting and platform data governance.