Back in 2013, Yahoo’s database was breached by hackers and it wasn’t discovered or reported until 2016. When that reporting happened last year, Yahoo thought that detials on 1 billion of its user accounts had been stolen. As it turns out, things are much worse than Yahoo (now owned by Verizon and part of Oath) originally thought.

Yahoo

Source: Hot Hardware – Yahoo Now Claims All 3 Billion Of Its User Accounts Were Compromised In 2013 Data Breach