Content protection system
First Claim
1. A content protection system, comprising:
- a user terminal; and
a license management apparatus,the user terminal comprising;
a judging unit for judging, when a content is to be reproduced or executed, whether or not the user terminal has a usage right of the content;
a usage right requesting unit for making, if the judging unit judges that the user terminal does not have the usage right of the content, a request to the license management apparatus to acquire the usage right of the content;
a generating unit for generating, when the content is to be acquired, temporary license information on the content; and
a control unit for preventing usage of the content using the generated temporary license information,wherein the usage right requesting unit makes, when the temporary license information is present, the request to the license management apparatus to acquire the usage right of the content,the license management apparatus comprising;
a license information generating unit for generating, when the request to acquire the usage right is received from the user terminal, license information containing information on an expiration date that is set based on a timing when the request is received; and
a license information transmitting unit for transmitting the generated license information to the user terminal,wherein the judging unit judges that the user terminal has the usage right of the content until the expiration date indicated by the license information received from the license management apparatus arrives.
4 Assignments
0 Petitions
Accused Products
Abstract
Provided is a content protection system, in which: a user terminal judges, when a content is to be reproduced or executed, whether or not the user terminal has a usage right of the content, and makes, if it is judged that the user terminal does not have the usage right of the content, a request to a license management apparatus to acquire the usage right of the content; the license management apparatus generates, when the request to acquire the usage right is received from the user terminal, license information containing information on an expiration date that is set based on a timing when the request is received, and transmits the generated license information to the user terminal; and the user terminal judges that the user terminal has the usage right of the content until the expiration date indicated by the license information received from the license management apparatus arrives.
9 Citations
8 Claims
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1. A content protection system, comprising:
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a user terminal; and a license management apparatus, the user terminal comprising; a judging unit for judging, when a content is to be reproduced or executed, whether or not the user terminal has a usage right of the content; a usage right requesting unit for making, if the judging unit judges that the user terminal does not have the usage right of the content, a request to the license management apparatus to acquire the usage right of the content; a generating unit for generating, when the content is to be acquired, temporary license information on the content; and a control unit for preventing usage of the content using the generated temporary license information, wherein the usage right requesting unit makes, when the temporary license information is present, the request to the license management apparatus to acquire the usage right of the content, the license management apparatus comprising; a license information generating unit for generating, when the request to acquire the usage right is received from the user terminal, license information containing information on an expiration date that is set based on a timing when the request is received; and a license information transmitting unit for transmitting the generated license information to the user terminal, wherein the judging unit judges that the user terminal has the usage right of the content until the expiration date indicated by the license information received from the license management apparatus arrives. - View Dependent Claims (2, 3, 4, 5)
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6. A user terminal to be connected to a license management apparatus, comprising:
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a judging unit for judging, when a content is to be reproduced or executed, whether or not the user terminal has a usage right of the content; a usage right requesting unit for making, if the judging unit judges that the user terminal does not have the usage right of the content, a request to the license management apparatus to acquire the usage right of the content; a generating unit for generating, when the content is to be acquired, temporary license information on the content; and a control unit for preventing usage of the content using the generated temporary license information, wherein the usage right requesting unit makes, when the temporary license information is present, the request to the license management apparatus to acquire the usage right of the content, and wherein the judging unit judges that the user terminal has the usage right of the content until an expiration date indicated by license information received from the license management apparatus in response to the request to acquire the usage right arrives, the expiration date being set based on a timing when the license management apparatus receives the request to acquire the usage right.
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7. A content protection method using a user terminal connected to a license management apparatus, comprising:
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judging, by the user terminal, when a content is to be reproduced or executed, whether or not the user terminal has a usage right of the content; requesting, by the user terminal, if it is that the user terminal does not have the usage right of the content, the license management apparatus to acquire the usage right of the content; generating, when the content is to be acquired, temporary license information on the content; and preventing usage of the content using the generated temporary license information, wherein the request to the license management apparatus to acquire the usage right of the content is made when the temporary license information is present, and wherein, if license information is received from the license management apparatus in response to the request to acquire the usage right, it is judged that the user terminal has the usage right of the content until an expiration date indicated by the license information arrives, the expiration date being set based on a timing when the license management apparatus receives the request to acquire the usage right.
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8. A non-transitory computer-readable information storage medium having a program stored therein, the program causing a computer connected to a license management apparatus to function as:
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a judging unit for judging, when a content is to be reproduced or executed, whether or not the computer has a usage right of the content; a usage right requesting unit for making, if the judging unit judges that the computer does not have the usage right of the content, a request to the license management apparatus to acquire the usage right of the content; and a generating unit for generating, when the content is to be acquired, temporary license information on the content, a control unit for preventing usage of the content using the generated temporary license information; wherein the usage right requesting unit makes, when the temporary license information is present, the request to the license management apparatus to acquire the usage right of the content, and wherein the judging unit judges that the computer has the usage right of the content until an expiration date indicated by license information received from the license management apparatus in response to the request to acquire the usage right arrives, the expiration date being set based on a timing when the license management apparatus receives the request to acquire the usage right.
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Specification