GoldenShield Video Encryption Tool - Version 10.0 Encrypt various types of video or audio files (e.g., wmv, avi, asf, mpg, rm, rmvb, mp4, flv, any other if you have corresponding decoder ) into exe files that can only be played when a Playback Password is provided, and users can only play the encrypted media files after obtaining the Playback Password provided by you. When a user wants to play an encrypted file, the encrypted file will pop up a dialog box to request the user to enter a Playback Password. This dialog box will display the machine ID of the user's computer. The user can send his/her own machine ID to you, and you can create a Playback Password based on the user's machine ID. After that the user can use this Playback Password to play your file on his/her computer. Since the Playback Password is created based on the user's machine ID, the user will not be able to share the Playback Password with other users.