Internet giant Yahoo said it has leaked the details of all its users.
The company said the number of accounts compromised in a 2013 hack has totalled three billion. That accounts for everyone who used it at the time of the leak.
Yahoo had earlier said around one billion accounts were part of that hack but has now revised the total.
According to the company, the details included personal information about each person, including their usernames, passwords, telephone numbers and dates of birth.