Method for authorizing contents play right in use of recording medium

The given contents reproduction permission is provided a method in a video apparatus off-line through a recording medium. The content playback authorization method, information on the step, and the rights of reproduction rights to reproduce the content recorded on the recording medium for recording the encrypted content key to the stage, the recording medium for recording the encrypted key to the recording medium, and a step of recording. As a result, it becomes possible to grant the playback authorization for the even content off-line video apparatus via a recording medium, and as a result, even in an off-line video apparatus, recorded on the recording medium and reproduce the content requiring playing authorization for playback that can be performed. Content, the recording medium, the reproduction rights, the reproduction permission device