title: Encrypt Images in Android to send to a PHP server
body: <p><strong>What I have:</strong>
  I have some images on SDcard, to be sent to a PHP server. </p>
  
  <p><strong>What I want:</strong>
  I want to encrypt these images before sending to server. There will be a unique key, for every user of application, which will be used for encryption on Android Side and for decryption on PHP server side. </p>
  
  <p>Please guide me how can I do this encryption and how should I send these encrypted Images to server. I can send simple images to a server (using multipart etc). But what should be the way to encrypt and then send the image to server?</p>