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Largest Study of its Kind Shows Outdated Password Practices are Widespread
(www.cc.gatech.edu)
This is a most excellent place for technology news and articles.
I am tired of websites imposing limitations on passwords, but not sharing what those are. I use a password generator, and rarely know if Unicode characters are allowed, if there's a limit on the number of characters, etc.
I've come across websites where dashes "-" are forbidden. My banking website only allows a maximum of 16 characters. Sometimes there's a note below the password box, sometimes they don't tell you until your password fails, and sometimes they don't ever tell you. If I don't know what the restrictions are, I'll end up throwing a cheap password at it until I can find out what's acceptable.
Sometimes the limits they tell you are wrong. Sometimes they truncate your password without telling you. Sometimes the app has different requirements than the website.