密碼強度估算JavaScript庫：zxcvbn

zxcvbn是一個JavaScript密碼強度估算庫。用它來實現一個注冊表單的自定義密碼強度條。由dropbox 開發。它需要一個必需的參數，輸入密碼，然后返回一個結果對象。結果包括一些屬性：

result.entropy            # bits

result.crack_time         # estimation of actual crack time, in seconds.
result.crack_time_display # same crack time, as a friendlier string:

                      # "instant", "6 minutes", "centuries", etc.


result.score              # [0,1,2,3,4] if crack time is less than

                      # [10**2, 10**4, 10**6, 10**8, Infinity].
                      # (useful for implementing a strength bar.)


result.match_sequence     # the list of patterns that zxcvbn based the

                      # entropy calculation on.


result.calculation_time   # how long it took to calculate an answer,

                      # in milliseconds. usually only a few ms.</pre> <p><strong>項目主頁：</strong><a href="http://www.baiduhome.net/lib/view/home/1410852022570" rel="nofollow" target="_blank">http://www.baiduhome.net/lib/view/home/1410852022570</a></p>