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Password length requirement
(feddit.org)
Last week, I tried to register for a service and was really surprised by a password limit of 16 characters. Why on earth yould you impose such strict limits? Never heard of correct horse battery staple?
That's true. But fortunately even the most basic hashing algorithms are more than enough to make worrying about these things pointless when it comes to passwords. You have to poorly implement everything by hand and make a series of bad calls to run into any issues.