It's not a well-kept secret, either. Just a simple string of characters—maybe six of them if you're careless, 16 if you're cautious—that can reveal everything about you.

Your email. Your bank account. Your address and credit card number. Photos of your kids or, worse, of yourself, naked. The precise location where you're sitting right now as you read these words. Since the dawn of the information age, we've bought into the idea that a password, so long as it's elaborate enough, is an adequate means of protecting all this precious data. But in 2012 that's a fallacy, a fantasy, an outdated sales pitch. And anyone who still mouths it is a sucker—or someone who takes you for one.

No matter how complex, no matter how unique, your passwords can no longer protect you.

Look around. Leaks and dumps—hackers breaking into computer systems and releasing lists of usernames and passwords on the open web—are now regular occurrences. The way we daisy-chain accounts, with our email address doubling as a universal username, creates a single point of failure that can be exploited with devastating results.