read original story here
Internet giant Yahoo announced a massive data breach Wednesday that affected over one billion accounts, making it by far the largest data breach in history. This follows the disclosure in September of a different breach that affected more than 500 million of the company’s customers.
What stands out with this new security compromise is that it occurred over three years ago, in August 2013, and that hackers walked away with password hashes that can be easily cracked.
If you’re a Yahoo user you should consider your password compromised and should take all the necessary steps to secure your account. You should follow all of Yahoo’s recommendations here