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Re:Late Meditations on XKCD 936 by sltkr on Saturday February 01, 2014 @04:15PM (#7163421)
Even shorter: (and much faster!)

    shuf -n 4 /usr/share/dict/words
Somewhat more seriously, Diceware works pretty well too as a low-tech, high-quality password generation method:

    http://world.std.com/~reinhold/diceware.html
(My only complaint is that a lot of words in the standard wordlist are pretty obscure.)
Re:Late Meditations on XKCD 936 by rockymeza on Saturday February 01, 2014 @05:24PM (#7163746)
https://www.fusionbox.com/mouseware/

we wrote this one at my company. It uses your mouse movements as a seed for the random number generator.