I learned at a relatively young age what makes a good password versus a bad password, and I’ve tried to always use these qualities in the passwords that I choose. The Problem Unfortunately, even with the best intentions, you inevitably end up re-using one or a few passwords across every single website you log into. Some people do things as dumb as using the name of their significant other. Or their pet. Or a birthdate. Or something else equally guessable by one of the many supercomputers that exist (whereby “supercomputer”, I mean pretty much any computer invented in the past 5–7 years).