You're probably well-acquainted with one of life's little annoyances: the password.
Your voicemail. Your email. Your smartphone. Maybe you've got a different one for each — which means you're bound to slip up.
Or maybe you use the same one for everything — a security no-no. The number of sites and services that demand a password or PIN seems to have grown exponentially. And keeping track of the ones you've got? Forget about it.