For the second time in just four months, Yahoo has announced a massive cyberattack. The first attack, which occurred in 2014, set a record with the breach of 500 million user accounts. But the company now believes that twice as many accounts were compromised in a second data breach.

Search engine conceptAn internal investigation at the search

In what may be the largest data breach ever publicly disclosed, Yahoo, disclosed that a 2014 cyberattack breached at least 500 million user accounts. The company said it believes state-sponsored actors were responsible and that the data stolen includes names, email addresses, telephone numbers, dates of birth, and hashed passwords.

Data privacy and securityThe data could also include