If you get hacked on Airbnb, you won't only have to worry about criminals getting ahold of your credit card details. You'll also have to fret about internet scammers knowing exactly where you're staying on a particular date or the addresses of the properties you own. In a blog post, the company has announced that it has added new security measures to protect your account from hijackers. Starting today, you'll have to authenticate every new phone, tablet or computer you log into by typing in the unique code Airbnb sends you via text or email. It's no two-factor authentication, but it can at least lessen the chances of a rando getting into your account.