title: BlueZ, do not require authentication
body: <p>I'm working with <code>BlueZ 3.x.</code> I have a linux embedded device and I need to send and receive files using the bluetooth technology, with <code>Obex</code>. (Note: <code>BlueZ 4.x</code> doesn't even compile on our specific platform.)</p>
  
  <p>I don't need PIN authentication, I even don't want it. It must remain as simple as possible for the end user.</p>
  
  <p>I tried to set <code>security none</code> in <code>hcid.conf</code> but it doesn't seem to work.</p>
  
  <p>So my question is:  </p>
  
  <ol>
  <li>Is it possible to send &amp;/ receive files using Obex on bluetooth? </li>
  <li>How to do it?</li>
  <li>Does bluetooth devices (e.g. mobile phone) requires authentication?</li>
  </ol>