title: Secure downloaded Files in android applications with internal storage and encrypting usage?
body: <p>I am working on an Android application which downloads files in External storage.</p>
  
  <p>I want to download them in internal storage and encrypt them so they become secure even with a rooted device.
  I found that we can work with internal storage and encrypting the files and to use them with external intents we use content-provider.</p>
  
  <p>Dose some one worked with this kind of stuff ? (internal-storage + encrypting + decrypting + content-providers).</p>
  
  <p>thanks </p>