the name of the online game. security with so many passwords for so many things, you might be tempted to make yours easy to remember. >> uh-huh. that also means it is easy for hackers to crack. abc's chief business and economics correspondent rebecca jarvis on how to protect yourself. >> reporter: they're the code that are supposed to keep our online info safe. but today 90% of the passwords we create are vulnerable to hacking. >> hacking is a game for a lot of people. >> reporter: since the birth of the internet, john posanitez has been testing online security for big business trying to break in making sure their secrets are safe. >> reporter: it is happening to big companies. what about people? >> it is happening to people all the time. an amateur hacker can go download these things and use a computer like this one, set up an automated script, hit go, and then sit back and wait until it spits out log-ins and password. >> reporter: and how long would this take? >> minutes.