You can see exactly how it is calculating the strength (and it includes spatial patterns; enough length and you do get some entropy out of it) here: https://dl.

You can see exactly how it is calculating the strength (and it includes spatial patterns; enough length and you do get some entropy out of it) here: https://dl.dropboxusercontent.com/u/209/zxcvbn/test/index.html https://dl.dropboxusercontent.com/u/209/zxcvbn/test/index.ht...