A few months ago, Yahoo admitted to about 500 million email accounts becoming compromised thanks to a hacker a.k.a. Peace. It all started when such hacker promised to sell 200 million usernames, passwords, and birthdates for some $2,000. The data breach affected some people and hackers could gain access to any of these yahoo email accounts, compromising more accounts which were associated with that email address. A new press release from Yahoo confirms that more than one billion accounts' information has been stolen by "an unauthorized third party" back in August of 2013 and...
Source: http://www.gsmarena.com/remember_yahoos_data_breach_it_happened_again_with_more_accounts_than_last_time-news-22183.php