Content usage-right management system and management method
First Claim
1. A content usage-right management system comprising:
- a user device that utilizes content; and
a service provider that distributes to said user device a content usage-right certificate in which content-usage condition information is stored, wherein;
said user device is configured to utilize the content according to the content-usage condition information stored in the content usage-right certificate received from said service provider and to make a request to change the content-usage condition information stored in the content usage-right certificate by sending the content usage-right certificate to said service provider, whereinsaid service provider is configured to generate, upon receiving the content usage-right certificate involving the request to change the content-usage condition information from said user device, an upgraded content usage-right certificate by changing the content-usage condition information recorded in the received content usage-right certificate and to send the upgraded content usage-right certificate to said user device,the content-usage condition information stored in the content usage-right certificate include usage condition information in which one of on-line usage that requires a determination of usage rights in said service provider and off-line usage that does not require a determination of usage rights in said service provider is set, andsaid service provider is configured to generate, upon receiving the content usage-right certificate involving the request to change the content-usage condition information from said user device, an upgraded content usage-right certificate by changing the usage-condition information between on-line usage and off-line usage for changing the content-usage condition information recorded in the received content usage-right certificate and to send the upgraded content usage-right certificate to said user device.
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Accused Products
Abstract
A system in which content usage conditions can be upgraded without the need for a service provider to control content-usage rights of a user. In the system in which encrypted content is distributed and is allowed to be utilized only by authorized users, the service provider receives a content usage-right certificate from the user, and on the condition that it is determined that data is not tampered with by verifying a digital signature of an issuing entity of the content usage-right certificate, the service provider obtains user information and content purchase information of the user from the content usage-right certificate, and performs upgrade processing by, for example, changing the usage conditions. It is thus possible to change the content usage conditions without the need for the service provider to possess usage control data.
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Citations
29 Claims
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1. A content usage-right management system comprising:
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a user device that utilizes content; and a service provider that distributes to said user device a content usage-right certificate in which content-usage condition information is stored, wherein; said user device is configured to utilize the content according to the content-usage condition information stored in the content usage-right certificate received from said service provider and to make a request to change the content-usage condition information stored in the content usage-right certificate by sending the content usage-right certificate to said service provider, wherein said service provider is configured to generate, upon receiving the content usage-right certificate involving the request to change the content-usage condition information from said user device, an upgraded content usage-right certificate by changing the content-usage condition information recorded in the received content usage-right certificate and to send the upgraded content usage-right certificate to said user device, the content-usage condition information stored in the content usage-right certificate include usage condition information in which one of on-line usage that requires a determination of usage rights in said service provider and off-line usage that does not require a determination of usage rights in said service provider is set, and said service provider is configured to generate, upon receiving the content usage-right certificate involving the request to change the content-usage condition information from said user device, an upgraded content usage-right certificate by changing the usage-condition information between on-line usage and off-line usage for changing the content-usage condition information recorded in the received content usage-right certificate and to send the upgraded content usage-right certificate to said user device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 28)
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10. A content usage-right management system comprising:
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a user device that utilizes content; and a service provider that distributes a content usage-right certificate in which purchased content information is stored to said user device, the content usage-right certificate having content-usage condition information including usage condition information in which one of on-line usage that requires a determination of usage rights in said service provider and off-line usage that does not require a determination of usage rights in said service provider is set, wherein; said user device is configured to send the content usage-right certificate to said service provider, and wherein said service provider is configured to generate, based on the content information stored in the content usage-right certificate received from said user device, an upgraded content usage-right certificate by changing the usage-condition information between on-line usage and off-line usage, the upgraded content usage-right certificate corresponding to an item of content belonging to an album that comprises of a set of items of content, which belong to the same group of content as the content information stored in the received content usage-right certificate, and to send the upgraded content usage-right certificate to said user device. - View Dependent Claims (11, 12)
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13. A content usage-right management method for use in a system that comprises a user device that utilizes content, and a service provider which distributes a content usage-right certificate in which content-usage condition information is stored to said user device, comprising the steps of:
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configuring said user device to make a request to change the content-usage condition information stored in the content usage-right certificate by sending the content usage-right certificate to said service provider; and configuring said service provider to generate, upon receiving the content usage-right certificate involving the request to change the content-usage condition information from said user device, an upgraded content usage-right certificate by changing the content-usage condition information recorded in the received content usage-right certificate and to send the upgraded content usage-right certificate to said user device; wherein the content-usage condition information stored in the content usage-right certificate include one of usage condition information in which on-line usage that requires a determination of usage rights in said service provider off-line usage that does not require a determination of usage rights in said service provider is set; and said service provider generates, upon receiving the content usage-right certificate involving the request to change the content-usage condition information from said user device, an upgraded content usage-right certificate by changing the usage-condition information between on-line usage and off-line usage for changing the content-usage condition information recorded in the received content usage-right certificate, and sends the upgraded content usage-right certificate to said user device. - View Dependent Claims (14, 15, 16, 17, 18, 19, 29)
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20. A content usage-right management method used in a system that comprises a user device that utilizes content, and a service provider that distributes a content usage-right certificate in which purchased content information is stored to said user device, the content usage-right certificate having content-usage condition information including usage condition information in which one of on-line usage that requires a determination of usage rights in said service provider and off-line usage that does not require a determination of usage rights in said service provider is set, the method comprising:
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sending the content usage-right certificate from said user device to said service provider; and causing said service provider to generate, based on the content information stored in the content usage-right certificate received from said user device, an upgraded content usage-right certificate by changing the usage-condition information between on-line usage and off-line usage, the upgraded content usage-right certificate corresponding to an item of content belonging to an album which comprises of a set of items of content, that belong to the same group of content as the content information stored in the received content usage-right right certificate, and to send the upgraded content usage-right certificate to said user device. - View Dependent Claims (21, 22)
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23. An information processing apparatus for use in a system that comprises a user device that utilizes content, and a service provider that distributes to said user device a content usage-right certificate in which purchased content information is stored, said information processing apparatus issuing the content usage-right certificate, wherein said information processing apparatus is configured to receive a request to change content-usage conditions of the issued content-usage condition information from said user device, verify the received content usage-right certificate, and generate an upgraded content usage-right certificate by changing the content-usage condition information recorded in the received content usage-right certificate on a condition that an integrity of the content usage-right certificate is determined by verifying the received content usage-right certificate and to send the upgraded content usage-right certificate to said user device;
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wherein the content-usage conditions stored in the content usage-right certificate include one of usage condition information in which on-line usage that requires a determination of usage rights in said service provider and off-line usage that does not require a determination of usage rights in said service provider is set; and said information processing apparatus is configured to generate, upon receiving the content usage-right certificate involving the request to change the content-usage condition information from said user device, an upgraded content usage-right certificate by changing the usage-condition information between on-line usage and off-line usage for changing the content-usage condition information recorded in the received content usage-right certificate and to send the upgraded content usage-right certificate to said user device. - View Dependent Claims (24, 25, 26)
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27. A computer-readable recording medium recorded with a computer program allowing, in a system that comprises a user device that utilizes content, and a service provider that distributes to said user device a content usage-right certificate in which purchased content information is stored, the content usage-right certificate having content-usage condition information including usage condition information in which one of on-line usage that requires a determination of usage rights in said service provider and off-line usage that does not require a determination of usage rights in said service provider is set, processing for issuing a content usage-right certificate to be executed on a computer system, said computer program comprising:
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receiving a request to change content-usage conditions of the issued content-usage condition information; verifying the received content usage-right certificate; and generating an upgraded content usage-right certificate by changing the content-usage condition information recorded in the received content usage-right certificate between on-line usage and off-line usage on a condition that an integrity of the content usage-right certificate is determined by verifying the received content usage-right certificate and sending the upgraded content usage-right certificate to said user device.
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Specification