Patent ID: 9524746
Filing Date: 2016-12-20
CPC Classification: G06F,G11B,H04L

Claim Text:
1. A playback device, comprising: a first acquisition unit that acquires, from a recording medium, a binding flag corresponding to a content, the recording medium storing the content and the binding flag, the binding flag indicating whether the content is bound with a user or the recording medium; a first judgment unit that judges whether the binding flag indicates that the content is bound with the user or that the content is bound with the recording medium and switches between a first determination mode and a second determination mode in accordance with a result of the judgment, the first determination mode for determining whether or not playback of the content is permitted and being used when the content is bound with the user, and the second determination mode for determining whether or not playback of the content is permitted and being used when the content is bound with the recording medium; an input receiving unit that, when the content is bound with the user, receives unique information for the content from the user, the unique information being specific to the user; a second judgment unit that, when the content is bound with the user, judges whether or not playback of the content by the user is permitted, the judgment executed by using the unique information; and a playback unit that, when the content is bound with the user and the playback of the content by the user is permitted, and when the content is bound with the recording medium, acquires the content from the recording medium and plays back the content, wherein the first determination mode includes the reception executed by the input receiving unit and the judgment executed by the second judgment unit, in the second determination mode, playback of the content stored in the recording medium is permitted, and the recording medium stores the content and first binding information in an associated state, the first binding information being generated by using the unique information that identifies the user who is permitted to play back the content, and the playback device further comprises: a generation unit that generates second binding information for the content by using the unique information that has been received, wherein the second judgment unit judges whether or not the first binding information and the second binding information match, when the first binding information and the second binding information match, the second judgment unit judges that playback of the content by the user is permitted, and when the first binding information and the second binding information do not match, the second judgment unit judges that playback of the content by the user is not permitted.