On Thursday, the company said it believes that information for “at least” 500 million user accounts was stolen.
The Guardian reported:
Details, including names, email addresses, phone numbers and security questions were taken from the company’s network in late 2014. Passwords were also taken, but in a “hashed” form, which prevents them from being immediately re-used, and the company believes that financial information held with it remains safe.
Bloomberg further explained:
In July, Yahoo! Inc. received a report of a hacker claiming to have 280 million user account credentials for sale on the black market. An initial investigation found no evidence to back that up, according to a person familiar with the probe.