With this encryption tool, you can encrypt various types of video or audio files (e.g., wmv, avi, asf, mpg, rm, rmvb, mp4, flv, and other media file) into exe files that can only be played when a Play Password is provided, and users can only play the encrypted media files after obtaining the Play 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 Play 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 Play Password based on the user's machine ID. After that the user can use this Play Password to play your file on his/her computer. Since the Play Password is created based on the user¡¯s machine ID, the user will not be able to share the Play Password with other users. You can either distribute Play Password offline, or using networks.