title: Password strength library - Objective C
body: <p>I am looking for a open source component that can estimate strength of a password. 
  Searching the web, I found this very interesting: <a href="https://github.com/lowe/zxcvbn">https://github.com/lowe/zxcvbn</a> (and for more details about it: <a href="https://tech.dropbox.com/2012/04/zxcvbn-realistic-password-strength-estimation/">https://tech.dropbox.com/2012/04/zxcvbn-realistic-password-strength-estimation/</a>).</p>
  
  <p>What impressed me was the ability to analise the given password comparing to <strong><em>"common passwords, common American names and surnames, common English words, and common patterns like dates, repeats (aaa), sequences (abcd), and QWERTY patterns."</em></strong></p>
  
  <p>Does anyone know something similar that can be used for an iOS/Mac app? If not, what are the best ways to start?</p>