title: Encrypting a properties file of a Webserver (AES)
body: <p>I am currently developing an Android app that requests specific properties from my webserver, which look like this:</p>
  
  <pre><code>&lt;properties&gt;
  &lt;property name="Approved-IP" value="SomeIPAddresses"/&gt;
  &lt;/properties&gt;
  </code></pre>
  
  <p>The app saves the site as a temporary XML file and tries to check these IPs.
  I want to let the server encrypt the properties using AES and IF the app doesn't have an encryption password set use a default key like "test123".</p>
  
  <p>The app then decrypts this information via the EasyCrypt library and uses it. </p>
  
  <p>The problem is that I don't really know how to do it server-side, so that the information won't be passed in plain text.</p>