Information acquisition device, information acquisition method, and information acquisition program
OwnerToshihisa Nakano, Hideshi Ishiharainventors
Life of this patent
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Abstract
Conventionally, before reading content from a recording medium, a drive device and a playback device that plays back content perform device authentication, in order to verify whether the playback device is authorized or not. Once the playback device has been verified as authorized, the playback device is permitted to read any content stored on the recording medium. In view of this, a reading device is provided that limits a type of content acquirable by the playback device by permitting the playback device to read content which satisfies a specific condition and prohibiting the playback device to read other content.
Claims17
An information acquisition device for acquiring information from a resource in accordance with an instruction from an information use device, the information acquisition device comprising:
- an acquisition unit operable to acquire, from the information use device, permitted group information indicating a group of information which the information use device is permitted to use;
- a judgment unit operable to acquire, from the resource, use target group information indicating a group of information to which use target information held by the resource belongs, and judge whether the use target information belongs to the group indicated by the permitted group information by comparing the permitted group information and the use target group information;
- and
- a control unit operable to acquire the use target information from the resource and output the acquired use target information to the information use device if the judgment unit judges affirmatively, and suppress the output if the judgment unit judges negatively.
An information acquisition method used in an information acquisition device for acquiring information from a resource in accordance with an instruction from an information use device, the information acquisition method comprising:
- an acquisition step of acquiring, from the information use device, permitted group information indicating a group of information which the information use device is permitted to use;
- a judgment step of acquiring, from the resource, use target group information indicating a group of information to which use target information held by the resource belongs, and judging whether the use target information belongs to the group indicated by the permitted group information by comparing the permitted group information and the use target group information;
- and
- a control step of acquiring the use target information from the resource and outputting the acquired use target information to the information use device if the judgment step judges affirmatively, and suppressing the output if the judgment step judges negatively.
An integrated circuit provided in an information acquisition device for acquiring information from a resource in accordance with an instruction from an information use device, the integrated circuit comprising:
- an acquisition unit operable to acquire, from the information use device, permitted group information indicating a group of information which the information use device is permitted to use;
- a judgment unit operable to acquire, from the resource, use target group information indicating a group of information to which use target information held by the resource belongs, and judge whether the use target information belongs to the group indicated by the permitted group information by comparing the permitted group information and the use target group information;
- and
- a control unit operable to acquire the use target information from the resource and output the acquired use target information to the information use device if the judgment unit judges affirmatively, and suppress the output if the judgment unit judges negatively.
An information acquisition program used in an information acquisition device for acquiring information from a resource in accordance with an instruction from an information use device, the information acquisition program comprising:
- an acquisition step of acquiring, from the information use device, permitted group information indicating a group of information which the information use device is permitted to use;
- a judgment step of acquiring, from the resource, use target group information indicating a group of information to which use target information held by the resource belongs, and judging whether the use target information belongs to the group indicated by the permitted group information by comparing the permitted group information and the use target group information;
- and
- a control step of acquiring the use target information from the resource and outputting the acquired use target information to the information use device if the judgment step judges affirmatively, and suppressing the output if the judgment step judges negatively.
An application program used in an information use device that uses information acquired from a resource via an information acquisition device, the information use device including a storage unit operable to store permitted group information indicating a group of information which the application program is permitted to use, the application program comprising:
- an output step of reading the permitted group information corresponding to the application program from the storage unit, and outputting the read permitted group information to the information acquisition device;
- an acquisition step of acquiring, if the information acquisition device judges that use target information held by the resource belongs to the group indicated by the permitted group information, the use target information via the information acquisition device;
- and
- a use step of using the acquired use target information.
A computer readable recording medium comprising:
- use target information;
- and
- use target group information indicating a group of information to which the use target information belongs.
Dependencies are inferred from the claim text.