My friend Michelle recently explained to me that password is a perfectly valid password to use. Her reason? “People always say not to use it. So now that nobody uses it anymore, it’s totally secure again!” How I’d Hack Your Weak Passwords In this case, Michelle made a fatal assumption. She assumed that human beings would be manually typing in guessed passwords. What she failed to understand is that it’s really, really easy for any off-the-shelf computer to chew through possible passwords at an incredible pace.