Yahoo has officially confirmed that at least 500 million e-mail accounts were violated in 2014 by a cyber attack: it is one of the greatest email hacks in the history of Internet. The news was anticipated by Recode website on September 22 and later confirmed by a Yahoo press release. The “once big” search engine says the theft involved personal account information such as phone numbers, dates of birth and did not involve data such as bank details or credit card numbers.
Yahoo is warning users whose account has been hacked and has disabled the security questions to access the accounts: users who have not changed passwords in the last two years have been suggested to do it as soon as possible. The company run by Marissa Mayer is claiming that the author of the security breach was a “state-sponsored” hacking group but has not given further details or evidence supporting this hypothesis.