Sending apparatus, receiving apparatus, use limit system and method of sending contents
First Claim
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1. A sending apparatus in a transmission system confirming that use permit information included in contents is identical with use permit information in a receiver and making it possible to use said contents, said sending apparatus comprising:
- storage means for storing physical features of a contents user as said use permit information and multiplexing means for multiplexing said physical features and contents.
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Abstract
A use limit system in which only contents users who have made a viewing contract can decrypt encrypted contents and use the contents.
Use limit is set on contents on the basis of the physical features of the rightful user. The use limit system is made up of a sending apparatus for sending the contents and a receiving apparatus which removes use limit of contents sent from the sending apparatus by acquiring the physical features of the rightful user of contents.
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Citations
20 Claims
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1. A sending apparatus in a transmission system confirming that use permit information included in contents is identical with use permit information in a receiver and making it possible to use said contents, said sending apparatus comprising:
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storage means for storing physical features of a contents user as said use permit information and multiplexing means for multiplexing said physical features and contents. - View Dependent Claims (2, 3, 4)
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5. A receiving apparatus which comprises:
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receiving means for receiving multiplexed information in which the physical features of a contents user and contents are multiplexed, acquiring means for acquiring the physical features of the content user included in said multiplexed information, judging means for judging whether the physical features of said contents user acquired by said acquiring means are identical with the physical features of a contents user received by said receiving means, and removal means that makes it possible to use contents included in multiplexed information received by said receiving means if said judging means judges that the physical features are identical. - View Dependent Claims (6, 7, 8, 9)
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10. A receiving apparatus which comprises:
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storage means storing the physical features of a contents user as use permit information, a sending apparatus comprising multiplexing means for multiplexing said physical features and contents, receiving means for receiving multiplexed information where said physical features and contents are multiplexed, acquiring means for acquiring the physical features of a contents user, judging means for judging whether the physical features of said contents user acquired by said acquiring means are identical with the physical features of a contents user received by said receiving means, and removal means that makes it possible to use contents included in multiplexed information received by said receiving means if said judging means judges that the physical features are identical.
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11. A contents sending method used in a transmission system confirming that use permit information included in contents is identical with use permit information in a receiver and making it possible to use said contents, said sending method comprising the steps of:
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scrambling contents and multiplexing said physical features and scrambled contents. - View Dependent Claims (13, 14, 15, 16, 17, 19, 20)
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12. A receiving apparatus in a system handling contents provided with a use limit for the transmission, a use limit for the reproduction and a use limit for contents, said receiving apparatus comprises:
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reading means for reading a removal key to remove the use limit for the contents when contents with the use limit for the transmission removed is obtained, and removal means for removing the use limit for the contents using the removal key read by said reading means, and transferring the contents to an apparatus where the contents is used.
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18. A use limit system handling contents provided with a use limit the transmission, a use limit for the reproduction and a use limit for contents, said use limit system comprises:
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first apparatus for removing a use limit for transmission, third apparatus for removing a use limit for contents when the contents with the use limit for the transmission removed is obtained, and second apparatus for removing a use limit for the reproduction when the contents with a use limit for contents is removed.
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Specification