Content usage management system and server used in the system
View Patent ↗A content usage management system includes a terminal device using content as digital production and a server device managing usage of the content on the terminal device. The server device includes a license information memory unit that memorizes license information indicating a usage rule of the content based on a user of the terminal device, and a license ticket issuance unit that generates a license ticket as right information indicating a part or all of a usage rule on the license information corresponding to the user based on a request from the user. The terminal device includes a requesting unit that requests usage of the content to the server device according to the user's designation, a receiving unit that receives the license ticket sent from the server device, and a content usage control unit that controls usage of the content according to the usage rule indicated on the received license ticket. The requesting unit makes a request by sending expected information indicating content to be requested and a usage volume of the content, and the license ticket issuance unit generates a license ticket according to the expected information sent from the requesting unit and sends the license ticket to the terminal device.
1. A content usage management system comprising:
a first terminal device for sending a license request comprising terminal capability information indicating a capability of said first terminal device with regard to content usage control, said first terminal device including a secure clock, and the terminal capability information including information indicating that said first terminal device includes a secure clock;
a second terminal device for sending a license request comprising terminal capability information indicating a capability of said second terminal device with regard to content usage control, said second terminal device not including a secure clock, and the terminal capability information including information indicating that said second terminal device does not include a secure clock; and
a server device for managing a usage rule of a user, receiving the terminal capability information from the first and second terminal devices, generating a first license ticket including part or all of the usage rule for processing content based on the terminal capability information sent from said first terminal device, sending the first license ticket to said first terminal device, generating a second license ticket including: part or all of the usage rule for processing content; a content identification; and a license ticket status flag set to indicate that the license information must be consumed upon receipt without being written on a recording medium based on the terminal capability information sent from said second terminal device, which indicates that the second terminal device does not include a secure clock, and sending the second license ticket to said second terminal device;
wherein said first terminal device controls content usage in accordance with the usage rule included in the first license ticket; and
said second terminal device determines the status of the license ticket status flag in the second license ticket and controls content usage, in accordance with the usage rule included in the second license ticket, thereby immediately executing the content identified by the content identification in response to the license ticket status flag being set to indicate that the license ticket must be consumed upon receipt without being written on a recording medium.
2. The content usage management system according to claim 1 , wherein said first terminal device controls content usage based on the first license ticket held on said first terminal device, and requests said server device to send the first license ticket to said first terminal device.
3. The content usage management system according to claim 1 , wherein said server device generates different license tickets even from the same usage rule based on license information generation control information that controls generation of the license.
4. The content usage management system according to claim 1 , wherein said second terminal device controls content usage based on the second license ticket held on said second terminal device, and for requesting said server device to send the second license ticket to said second terminal device.
5. A content usage management system comprising:
a first terminal device for sending a license request comprising terminal capability information indicating a capability of said first terminal device with regard to content usage control, said first terminal device including a storage unit for a secure recording medium, and the terminal capability information including information indicating that said first terminal device includes a storage unit for a secure recording medium;
a second terminal device for sending a license request comprising terminal capability information indicating a capability of said second terminal device with regard to content usage control, said second terminal device not including a storage unit for a secure recording medium, and the terminal capability information including information indicating that said second terminal device does not include a storage unit for a secure recording medium;
a server device for managing a usage rule of a user, receiving the terminal capability information from the first and second terminal devices, generating a first license ticket including part or all of the usage rule for processing content based on the terminal capability information sent from said first terminal device, sending the first license ticket to said first terminal device, generating a second license ticket including: part or all of the usage rule for processing content; a content identification; and a license ticket status flag set to indicate that the license information must be consumed upon receipt without being written on a recording medium based on the terminal capability information sent from said second terminal device, and sending the second license ticket to said second terminal device;
wherein said first terminal device controls content usage in accordance with the usage rule included in the first license ticket; and
said second terminal device determines the status of the license ticket status flag in the second license ticket and controls content usage, in accordance with the usage rule included in the second license ticket, thereby immediately executing the content identified by the content identification in response to the license ticket status flag being set to indicate that the license ticket must be consumed upon receipt without being written on a recording medium.
6. The content usage management system according to claim 5 , wherein said first terminal device controls content usage based on the first license ticket held on said first terminal device, and for requesting said server device to send the first license ticket to said first terminal device.
7. The content usage management system according to claim 5 , wherein said server device generates different license information even from the same usage rule based on license information generation control information that controls generation of the license information.
8. A content usage management method for a system that includes a first terminal device including a secure clock, a second terminal device not including a secure clock, and a server device managing usage of digital content on the terminal device,
wherein, in the first terminal device, said method comprises sending a license request comprising terminal capability information indicating a capability of the first terminal device with regard to content usage control, the terminal capability information including information indicating that the first terminal device includes a secure clock;
wherein, in the second terminal device, said method comprises sending a license request comprising terminal capability information indicating a capability of the second terminal device with regard to content usage control, the terminal capability information including information indicating that the second terminal device does not include a secure clock;
wherein, in the server device, said method comprises managing a usage rule of a user, receiving the terminal capability information from the first and second terminal devices, generating a first license ticket including part or all of the usage rule for processing content based on the terminal capability information sent from the first terminal device, sending the first license ticket to the first terminal device, generating a second license ticket including: part or all of the usage rule for processing content; a content identification; and a license ticket status flag set to indicate that the license ticket must be consumed upon receipt without being written on a recording medium based on the terminal capability information sent from the second terminal device, and sending the second license ticket to the second terminal device;
wherein, in the first terminal device, said method further comprises controlling content usage in accordance with the usage rule included in the first license ticket; and
in the second terminal device, said method further comprises, determining the status of the license ticket status flag in the second license ticket and controlling content usage, in accordance with the usage rule included in the second license ticket, thereby immediately executing the content identified by the content identification in response to the license ticket status flag being set to indicate that the license ticket must be consumed upon receipt without being written on a recording medium.