A new disclosure from Yahoo — now known as Oath after it was bought by telecom company Verizon — dramatically escalates the size of the 2013 hack revealed last year. Demolition Racer Pc. Marcio Jose Sanchez/AP Every user who had a Yahoo account in August 2013 was likely affected by its massive hack, the company's parent, Verizon, said Tuesday. This latest disclosure triples the number of accounts compromised by the major 2013 data breach that the company.

At the time, Yahoo said hackers had stolen data associated with 1 billion user accounts; the new disclosure escalates that number to 3 billion. Despite news of the hack's much-broader scope, the company says the steps needed to protect all of its users were already taken last year, when the hack was first discovered. Choi Co Tuong Voi May.

As originally, hackers in the 2013 breach stole account information such as names, email addresses, phone numbers, birth dates as well as hashed passwords and security questions and answers. Yahoo, now known as Oath, says in late 2016 it forced password changes for all accounts that haven't done so since 2013 and invalidated old security questions and answers.