Hacktivists broke into the Sony PlayStation Network exposing the personal information on more than 77 million accounts associated with the gaming platform. The Sony network breach occurred in April 2011, and Sony took its gaming network offline for three weeks while a forensics team investigated the scope of the problem. Sony didn't acknowledge the possibility of data loss until April 26. The firm did not confirm the data exposure until May 4. The breach included thousands of unencrypted credit card numbers.