Most Common Passwords used on RockYou:
RockYou has been criticized in the past for having poor privacy practices. An unknown hacker managed to get in and steal millions of user accounts and passwords, and then posted them on the Internet publicly (This goes to show you that website security is extremely important, especially if you allow your visitors and clients to access your site). Imperva, a company that develops software for preventing hackers and has been running studies like this for over a decade, took the list and put together the top 32 most used passwords. Imperva states that the data set from RockYou is pretty similar to the rest of the Internet.
If anyone remembers that infamous scene in the film 'Space Balls' where Mel Brooks recites the password (12345) that gives him access to an entire planet, he shrugs off the fact that it's also the same password as his luggage. The joke isn't very far off, since the study shows that '123456' represents 1% of passwords used. Of course, right up there on the list is '12345,' the creative adaptation '654321,' and of course the nefarious 'password.' In fact, 20% of the 32 million people used a tiny pool consisting of 5,000 passwords. A hacker could easily fire off thousands of password guesses in a matter of minutes, meaning these users might as well not have a password in the first place.
If it isn't obvious, having a secure password matters. Use a combination of letters and numbers, and if the site gives you the option to enter 6-18 characters, don't be compelled to stop on the sixth. Don't use common words, names, or sequential numbers, and always combine numbers with letters (and symbols if possible). Some sites won't allow you to pick common passwords, and others may take action to block an account if too many incorrect guesses are made, but the real line of defense is having a strong password for each account. At least have two or three so your email, bank accounts, and social networking sites are all using separate passwords, although it's best to have a different password for each account, just in case.