The best thing you can do to protect yourself from hackers

Two-factor authentication: Learn these words well and you'll feel better when giant hacks splatter passwords and email addresses all over the dark web. Yahoo conceded Thursday that information linked to 500 million user accounts has been leaked by hackers. If you're one of the people affected, there's not much you can do about your email address, phone numbers and date of birth spreading online. But you certainly can take steps to ensure bad actors won't be able to wriggle their way into your accounts using that information. It's unfortunate that "two-factor authentication" mostly sounds like a safe-sex practice for robots in an Isaac Asimov novel.