Remember how Yahoo was hacked back in 2013? And how, in December 2016, the company said that 1 billion accounts had been compromised? Well, that turns out to have been an understatement. Yahoo is now admitting that every single one of the company’s 3 billion accounts was hacked. Word on the street is that the best response isn’t to delete your account, since it will eventually be recycled and could potentially be used against you. Instead, it’s better to change your password to something unique and enable two-factor authentication (which Yahoo calls Account Key). And if you ever used your Yahoo password on other Web sites, be sure to give them new, unique passwords too!