Ask Slashdot: Changing Passwords For the New Year?
New submitter windcask asks "Every New Year's Day, I assemble and memorize a random collection of seven to ten mixed-case alphanumeric characters and proceed to change every password I have on the interwebs to these characters (plus a few extra characters unique to the site). The problem is I only change them on the sites I visit. Once in a while, I'll come across a site I haven't visited for a few years, and I may end up not being able to guess the password before the try-lockout takes effect. What are your password-changing rituals, and how do they deal with situations like mine? I do use Keepass for work, but it is sometimes impractical for times I'm at other computers."
Password length is not enough. The reason they ask you to add numbers and punctuation signs is that common words for passwords are susceptible to dictionary attacks