forward lock mp3 file in Android 2.x
<p>I want add some drm protection (forward lock) to mp3 file to use it in android phone. </p>

<p>Can i encrypt my mp3 file with an application and push it in the android phone ?</p>

<p>OR </p>

<p>I need to implement the application to encrypt the file and after that push it in the andoird phone? 
(if i need to implement the encrypter - Wich library (API) i need to use ?)</p>

<p>Thank's a lot and excuz my english</p>

<hr>

<p>OK! more exemples.</p>

<p><em>case 1:</em>
User get file from server (music file1.mp3) in android phone !
User use it like ringtones but can't share it or download it in computer. </p>

<p><em>case 2:</em>
User get file from server (picture file1.png) in android phone !
User use it like wallpapers but can't share it or download it in computer. </p>

<p><strong>PROBLEM :
how can i implement -> the user can't share the file or download it in computer ?</strong></p>
