## Password entropy - Physics Stop

Marcus Wilson • Apr 30, 2014 •

As part of some 'NetSafe' training, I was shown this lovely xkcd cartoon http://xkcd.com/936/ . Password entropy. That's a good way of putting it. The statistical mechanics definition of entropy would be k ln W, where k is Boltzmann's constant, W is the number of permutations possible, and ln is 'the natural logarithm'. Higher entropy, means … Read More