Our lives are becoming more tightly integrated with online services every day. From email, calender, and to-do lists, to grades, banking, and bill payment, almost everything can be done via some web portal on some web server. To protect ourselves from identity theft we’re told we need to use passwords that are long, contain mixed-case lettering, numbers, and even symbols — in other words, we need passwords that are difficult for us to remember. Then, to make matters worse, we’re told that we need to use different passwords for each site so we minimize the potential impact ...