title: How would I encrypt a string on IOS and decrypt in windows?
body: <p>I would like to encrypt a string (password) on:</p>
  
  <ul>
  <li>an iOS device  (in Objective C)</li>
  <li>an Android device (in Java)</li>
  <li>a Windows phone (in C#)</li>
  </ul>
  
  <p>...and then send that string via http to a Windows Server that will decrypt it (in C#).</p>
  
  <p>Is there some utility / library / encryption engine that is capable of doing such a task?</p>
  
  <p>Would you provide sample code for:</p>
  
  <ul>
  <li>iOS device  (in Objective C)</li>
  <li>Android device (in Java)</li>
  </ul>
  
  <p>Thanks</p>