DIGITAL CONTENT USE APPARATUS AND METHOD
First Claim
1. A digital content use apparatus comprising:
- a disc device configured to read information from an optical disc that describes content data, a resource description file including acquisition destination information of an adapt right description file which describes resource information, identification information, and the execution contents and conditions of copying of the content to be handled as units of copying processing, disc identification information, and a disc serial number;
a communication start unit configured to transmit the read disc identification information to a server;
a first response unit configured to transmit, when the server supports the disc identification information and first key information (random number
1) is returned from the server, information prepared by appending, to the disc serial number, a tamper-resistant code generated using key information unique to the disc and the first key information (random number
1), second key information (random number
2), and a target profile of a player to be used to the server; and
a second response unit configured to store, when the server verifies whether or not the tamper-resistant code is normal and determines whether or not the disc serial number is authentic, license information which includes the disc serial number, the target profile, transcoding information used to copy a resource, and use limitation information used to limit use of a copied content, and to which a tamper-resistant code is appended using a disc unique key and the second key information (random number
2) by the server is received from the server, and the temper-resistant code of the license information is verified to obtain authenticity, the use limitation information being stored in a storage, and to supply the transcoding information to a transcoding and save unit configured to transcode the resource and to save the transcoded resource in the storage based on the transcoding information.
1 Assignment
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Accused Products
Abstract
According to one embodiment, the invention protects a digital content from being illicitly copied. Resource information of content data which may be permitted to be copied, and acquisition destination information of a file that describes an Adapt RE permits to copy resources are stored in the optical disc. The Adapt RE file stores an acquisition destination of a Use RE file that permits secondary use of a copy. An apparatus has a unit configured to interpret the resource information, a unit configured to determine copying conditions by acquiring an Adapt RE file as a result of interpretation, a unit configured to execute copying based on the copying conditions, and a unit configured to acquire a Use RE based on the Adapt RE and to save the Use RE in association with the copy.
29 Citations
23 Claims
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1. A digital content use apparatus comprising:
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a disc device configured to read information from an optical disc that describes content data, a resource description file including acquisition destination information of an adapt right description file which describes resource information, identification information, and the execution contents and conditions of copying of the content to be handled as units of copying processing, disc identification information, and a disc serial number;
a communication start unit configured to transmit the read disc identification information to a server;
a first response unit configured to transmit, when the server supports the disc identification information and first key information (random number
1) is returned from the server, information prepared by appending, to the disc serial number, a tamper-resistant code generated using key information unique to the disc and the first key information (random number
1), second key information (random number
2), and a target profile of a player to be used to the server; and
a second response unit configured to store, when the server verifies whether or not the tamper-resistant code is normal and determines whether or not the disc serial number is authentic, license information which includes the disc serial number, the target profile, transcoding information used to copy a resource, and use limitation information used to limit use of a copied content, and to which a tamper-resistant code is appended using a disc unique key and the second key information (random number
2) by the server is received from the server, and the temper-resistant code of the license information is verified to obtain authenticity, the use limitation information being stored in a storage, and to supply the transcoding information to a transcoding and save unit configured to transcode the resource and to save the transcoded resource in the storage based on the transcoding information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A digital content use method for a system which comprises a disc device configured to read information from an optical disc that describes content data, a resource description file including acquisition destination information of an adapt right description file which describes resource information, identification information, and the execution contents and conditions of copying of the content to be handled as units of copying processing, disc identification information, and a disc serial number, a communication start unit, a first response unit, and a second response unit, comprising:
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controlling the communication start unit to transmit the read disc identification information to a server;
controlling, when the server supports the disc identification information and first key information (random number
1) is returned from the server, the first response unit to transmit information prepared by appending, to the disc serial number, a tamper-resistant code generated using key information unique to the disc and the first key information (random number
1), second key information (random number
2), and a target profile of a player to be used to the server; and
controlling, when the server verifies whether or not the tamper-resistant code is normal and determines whether or not the disc serial number is authentic, license information which includes the disc serial number, the target profile, transcoding information used to copy a resource, and use limitation information used to limit use of a copied content, and to which a tamper-resistant code is appended using a disc unique key and the second key information (random number
2) by the server is received from the server, and the temper-resistant code of the license information is verified to obtain authenticity, the second response unit to store the use limitation information in a storage, and to supply the transcoding information to a transcoding and save unit configured to transcode the resource and to save the transcoded resource in the storage. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. In a form using a managed copy device which comprises a disc device configured to read information from an optical disc that describes content data, a resource description file including acquisition destination information of an adapt right description file which describes resource information, identification information, and the execution contents and conditions of copying of the content to be handled as units of copying processing, disc identification information, and a disc serial number, a communication start unit, a first response unit, and a second response unit, and a license server configured to communicate with the managed copy device, a digital content use method for protecting license information from tampering and illicit decryption by making a transaction method execute:
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first processing of transmitting the disc identification information from the managed copy device to the license server;
second processing of transmitting random number 1 generated by the license server to the managed copy device;
third processing of making the managed copy device generate a key for a tamper-resistant code (MAC) from a disc unique key based on the disc identification information and the random number 1, and appending the MAC to the disc serial number;
fourth processing of making the managed copy device generate random number 2, and transmitting the random number 2, the Target Profile, and the disc serial number appended with the MAC to the license server;
fifth processing of making the license server verify the MAC of the disc serial number;
sixth processing of generating license information when the license server confirms that the MAC of the disc serial number is authentic;
seventh processing of making the license server generate a key for a MAC from the disc unique key and the random number 2, appending the MAC to the license information, and transmitting the license information to the managed copy device;
eighth processing of making the managed copy device verify the MAC of the license information; and
ninth processing of making the managed copy device verify if the disc serial number and the Target Profile included in the license information are authentic. - View Dependent Claims (19)
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20. A digital content use apparatus comprising:
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a disc device configured to read information from an optical disc that describes content data, a resource description file including acquisition destination information of an adapt right description file which describes resource information, identification information, and the execution contents and conditions of copying of the content to be handled as units of copying processing, disc identification information, and a disc serial number;
a communication start unit configured to transmit the read disc identification information to a server;
a first response unit configured to transmit, when the server supports the disc identification information and first key information (random number
1) is returned from the server, information prepared by appending, to the disc serial number, a tamper-resistant code generated using key information unique to the disc and the first key information (random number
1), second key information (random number
2), and a target profile of a player to be used to the server; and
a second response unit configured to store, when the server verifies whether or not the tamper-resistant code is normal and determines whether or not the disc serial number is authentic, license information which includes the disc serial number, the target profile, transcoding information used to copy a resource, and use limitation information used to limit use of a copied content, and which is obtained by appending a digital signature using a server private key to the license information and the second key information (random number
2) by the server is received from the server, and authenticity of the digital signature is obtained using a server public key on the disc, the use limitation information being stored in a storage, and to supply the transcoding information to a transcoding and save unit configured to transcode the resource and to save the transcoded resource in the storage based on the transcoding information. - View Dependent Claims (21)
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22. A digital content use apparatus comprising:
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a disc device configured to read information from an optical disc that describes content data, a resource description file including acquisition destination information of an adapt right description file which describes resource information, identification information, and the execution contents and conditions of copying of the content to be handled as units of copying processing, disc identification information, and a disc serial number;
a communication start unit configured to transmit the read disc identification information to a server;
a first response unit configured to transmit, when the server supports the disc identification information and first key information (random number
1) is returned from the server, information prepared by appending, to the disc serial number, a tamper-resistant code generated using key information unique to the disc and the first key information (random number
1), second key information (random number
2), and a target profile of a player to be used to the server, and to check, when a server certificate appended with a signature is transmitted from the server, authenticity of the server certificate; and
a second response unit configured to store, when the server verifies whether or not the tamper-resistant code is normal and determines whether or not the disc serial number is authentic, license information which includes the disc serial number, the target profile, transcoding information used to copy a resource, and use limitation information used to limit use of a copied content, and which is obtained by appending a digital signature using a server private key to the license information and the second key information (random number
2) by the server is received from the server, and authenticity of the digital signature is obtained using a public key in the server certificate, the use limitation information being stored in a storage, and to supply the transcoding information to a transcoding and save unit configured to transcode the resource and to save the transcoded resource in the storage based on the transcoding information. - View Dependent Claims (23)
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Specification