How to play encrypted video file using WindowsMediaPlayer?

Question

I encrypt my .mp4 into a custom format (.opu). Now I should decrypt my file and save them into temp folder at the start of my application. and play them using WindowsMediaPlayer 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?

score 1 · Accepted Answer · answered Jun 19 '15 at 14:16

1

The best way would be to perform the decrypt to a stream in memory and play the video from there. That way there is never an on-disk file to steal.

answered Jun 19 '15 at 14:16

Kevin

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How to play using `memorystream`? – Mohamad Shiralizadeh Jun 19 '15 at 14:51
You'll find a couple of answers to that, along with links here http://stackoverflow.com/questions/12405635/play-videos-from-memory-stream – Kevin Jun 19 '15 at 18:13

score 0 · Answer 2 · answered Aug 15 '15 at 15:51

There is a way using virtualization, i.e. hooks. The idea is to hook functions like ReadFile to provide decrypted data, SetFilePointer to maintain current pointer within a "file" etc. You can view one of the examples at http://www.boxedapp.com/encrypted_video_streaming.html

How to play encrypted video file using WindowsMediaPlayer?

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