title: How to play encrypted video file using WindowsMediaPlayer?
body: <p>I encrypt my <code>.mp4</code> into a custom format (<code>.opu</code>). Now I should decrypt my file and save them into temp folder at the start of my application. and play them using <code>WindowsMediaPlayer</code> control in C#. So I have the risk of stealing my files from temp folder. What is the best way to prevent stealing my files? How to play encrypted video file using WindowsMediaPlayer?</p>