JP2007018301A - Apparatus for processing use condition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a server-type broadcasting system which allows non-contracted receiving apparatuses to use a license generated by a contracted receiving apparatus. <P>SOLUTION: In the server-type broadcasting system, encrypted contents are stored into receiving apparatuses to be used, a license is provided with a limited viewing period generated based on a contract expiration date and a content use time limit. A use condition determination means 303 uses the limited viewing period to determine conditions of use of the license, so that non-contracted receiving apparatuses can use the license generated by a contracted receiving apparatus. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention provides a content distribution system that restricts the use of encrypted content according to the usage conditions based on a contract and the usage conditions of a license determined for each content, and uses the license by moving between usage condition processing devices. It relates to the license usage method.

  Content distribution services that distribute content in real time or on demand using broadcast or communication are widely used. Particularly in Japan, implementation of a content distribution service called server-type broadcasting is planned.

  In server-type broadcasting, encrypted content and a content key are broadcasted and stored in a receiving apparatus while being encrypted. The user signs a contract for each usage rule processing device configured with an IC card or the like as a security module, and the receiving device connected to the contracted usage rule processing device can release the content encryption by the license. Can be used. Here, the license is information composed of a use condition and a content key.

  Hereinafter, a receiving device connected with a contracted usage condition processing device is called a receiving device with a contract, and a receiving device connected with a usage condition processing device without a contract is called a receiving device without a contract.

  Content encryption is performed using at least three types of keys. The content body is encrypted with the content key (Kc), and this Kc is encrypted with the work key (Kw). Kw is encrypted with the master key (Km) and transmitted to the receiving apparatus.

  Kc is a key common to each receiving device updated for each content. Kw is a key that is individually assigned to each receiving apparatus with a contract. When a receiving contract is made, this Kw is encrypted with Km and transmitted from the broadcasting station to the receiving apparatus with the contract.

  Km differs for each use condition processing device and is stored in the use condition processing device.

  In the usage condition processing device, the encrypted Kw sent to the receiving device at the time of contract is decrypted with the Km held and stored. Then, using this Kw, the encrypted Kc sent together with the encrypted content is decrypted, and the receiving apparatus decrypts the content using the decrypted Kc. According to Non-Patent Document 1, in Type I content, the content body is encrypted with Ks (scramble key), and ECM-Kc including Ks is encrypted with Kc.

  In the broadcasting station, the encrypted Kw is included in individual information (EMM: Entity Management Message) and periodically transmitted to the receiving device with the contract, and the use condition processing device connected to the receiving device with the contract Remember. In addition to the encrypted Kw, the individual information includes an individual information ID and a contract expiration date.

  Also, the broadcast station includes the encrypted Kc in the common information and transmits it together with the content, and the receiving apparatus stores the common information together with the corresponding content. Here, the common information is KCM transmission ECM (Entirement Control Message) and ACI (Access Control Information) of Non-Patent Document 1. In addition to the encrypted Kc, the common information includes an individual information ID of the individual information having Kw for decrypting the encrypted Kc, a content use period, and the like.

  Content is used in the following manner.

  The usage condition processing device first acquires the individual information ID from the common information corresponding to the content to be used, acquires the individual information indicated by the individual information ID, and decrypts Kw using Km. Next, Kc is decoded from the common information using this Kw. The information including the Kc, the individual information ID, and the content use time limit is called a license, and the use condition processing apparatus stores the information. The above is the preprocessing for content use. If the license corresponding to the content is accumulated, this preprocessing can be omitted.

  If the pre-processing has been completed, the usage condition processing device first acquires the identification ID of the individual information from the license corresponding to the content to be used, and refers to the individual information indicated by the identification ID. Next, use condition determination is performed. If the current time is within the contract expiration date and the content usage time limit, it is determined that the usage condition is satisfied, and Kc is passed to the receiving device. The receiving device uses the Kc to decrypt and use the content.

  Here, there is a case where it is desired to use the content with a receiving apparatus without a contract. For example, the living room receiving apparatus is a receiving apparatus with a contract, and the bedroom receiving apparatus is a receiving apparatus without a contract. If the users are the same or are used by family members, it is possible to make the content usable even in a receiving device without a contract, as long as it is within a certain usage range. It is also preferable from the viewpoint.

As described above, when a certain content is used between different receiving apparatuses, in the conventional technique, the license is transferred or transferred between the receiving apparatuses (see, for example, Patent Document 1). However, in the case of server-type broadcasting, in order to use content, individual information is also required in addition to the license. Therefore, content cannot be used between different receiving devices simply by moving the license as in the prior art. . Therefore, when content is used by a receiving device without a contract, it is assumed that individual information is moved in addition to a license from a receiving device with a contract to a receiving device without a contract. Then, since the individual information is periodically transmitted from the broadcasting station to the receiving device with the contract, the receiving device with the contract receives the individual information even after the individual information is moved to the receiving device without the contract. That is, individual information exists in a receiving apparatus with a contract and a receiving apparatus without a contract. Since there must be only one piece of individual information for each contract, there is a problem that it is not possible to move the license and the individual information to a receiving apparatus that does not have a contract and use the content.
JP 2002-169726 A "ARIB STD-B25 4.1 Edition", The Japan Radio Industry Association, 2001

  As described above, in server-type broadcasting, content cannot be used by a receiving apparatus without a contract by license transfer as in the prior art, and there is a problem that user convenience is impaired.

  SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a use condition processing device that generates a license that allows a content to be used by a receiving device without a contract without moving individual information in server-type broadcasting. Further, when the contract is updated in the receiving apparatus with the contract, the renewability of the contract can be determined in the receiving apparatus without the contract, the license update request can be transmitted to the receiving apparatus with the contract, and the license can be updated. An object is to provide a possible license and usage condition processing apparatus.

  The usage condition processing apparatus according to claim 1 of the present invention is a first usage condition corresponding to a plurality of second usage conditions, a third usage condition generated from the second usage condition, and the second usage condition. Usage condition determination means for determining whether or not content can be used in accordance with a first license including usage conditions; update determination means for determining the possibility of updating the third usage condition in accordance with the second usage condition; And a first updating means for updating the third usage condition in accordance with the first usage condition and the second usage condition.

  The use condition processing apparatus according to claim 2 of the present invention further comprises a generating means for generating the first license.

  The use condition processing device according to claim 3 of the present invention further comprises transfer means for transferring the first license to an external device not having the first use condition.

  The use condition processing device according to claim 4 of the present invention further includes update request information including a content iron identifier for uniquely identifying content from an external device not having the first use condition or a license identifier for uniquely identifying a license. Receiving means, search means for searching for at least one of the first use condition and the second use condition corresponding to the content identifier or the license identifier, and the first use searched by the search means Information indicating that the third use condition updated by the first update unit according to the condition and the second use condition, the first use condition searched by the search unit, or non-updatable Update instruction means for transmitting the update instruction information.

  The use condition processing apparatus according to claim 5 of the present invention is characterized in that the update request information includes the second use condition in addition to the content identifier, and the update instruction means searches for the first use condition searched by the search means. And the third usage condition updated by the first update means according to the second usage condition included in the update request information, or the first usage condition searched by the search means, or not updateable. Update instruction information including information indicating the presence is transmitted.

  The usage condition processing device according to claim 6 of the present invention further includes an update request means for transmitting update request information including a content identifier for uniquely identifying content to the external device having the first usage condition, and the first Means for receiving update instruction information including information indicating that the third use condition, the first use condition, or the third use condition cannot be updated from an external device having the use condition And second update means for updating the third use condition according to the received update instruction information.

  In the usage condition processing apparatus according to claim 7 of the present invention, the second update unit overwrites the third usage condition to be recorded with the third usage condition included in the update instruction information.

  The usage condition processing apparatus according to claim 8 of the present invention is characterized in that the second update unit is configured to execute the first update unit according to the first usage condition included in the update instruction information and the second usage condition to be recorded. The third usage condition recorded by the above is updated.

  The use condition processing device according to claim 9 of the present invention further comprises a license receiving means for receiving the first license.

  The use condition processing apparatus according to claim 10 of the present invention is characterized in that the first use condition, the second use condition, and the third use condition include at least one of a time limit and the number of times.

  The usage condition processing apparatus according to claim 11 of the present invention is characterized in that the first update means sets the shortest deadline among the deadlines included in the first usage condition and the second usage condition to the third usage condition. And at least one of means for setting the number of times included in the first use condition and the second use condition as a number of times included in the third use condition. Including.

  In the usage rule processing device according to claim 12 of the present invention, the third usage rule is generated from the first usage rule, the second usage rule, and the contract renewal date information relating to the contract renewal date. The update means is means for setting the shortest time limit among the time limit and the contract renewal date information included in the first use condition and the second use condition as the time limit included in the third use condition.

  The use condition processing apparatus according to claim 13 of the present invention receives the contract renewal date information from broadcast or communication.

  In the usage rule processing device according to claim 14 of the present invention, the contract update date information is unique to the usage rule processing device.

  The usage condition processing apparatus according to claim 15 of the present invention further provides at least one of the processing result of the update determination means, the first update means, or the processing result of the second update means to notify the user. Means for outputting one.

  In the use condition processing device according to claim 16 of the present invention, the external device is the use condition processing device.

  In the usage condition processing apparatus according to claim 17 of the present invention, the external device broadcasts first usage condition information including the first usage condition and second usage condition information including the second usage condition. Or it is a receiving apparatus provided with the means to receive from communication, and the means to output a process result to a display apparatus.

  The usage rule processing device according to claim 18 of the present invention is a server in which the external device manages the first usage rule.

  In the usage condition processing device according to claim 19 of the present invention, the usage condition processing device is an IC card.

  The usage condition processing device according to claim 20 of the present invention is included in the receiving device.

  According to the present invention, the third usage condition generated from the contract expiration date and the content usage time limit is added to the license and used for content usage condition determination, so that the content can be used even by a receiving device without a contract. Become. Further, even when the contract is renewed by the receiving device with the contract, the renewal of the license is determined by comparing the content usage time limit with the third usage condition in the receiving device without the contract, and the receiving measure with the contract A license update request can be transmitted to the license to update the license.

  Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1)
In the first embodiment, an operation when a license generated by a receiving device with a contract is transferred to a receiving device without a contract and used is taken as an example. It is assumed that the user can arbitrarily update the contract, such as extending or canceling the contract, at the receiving apparatus with the contract.

  FIG. 1 is a diagram showing a configuration of an entire server type broadcasting system according to Embodiment 1. In FIG. 1, the server type broadcasting system includes a server 100, a receiving device 200, a display device 210, and a use condition processing device 300. The user makes a contract for each use condition processing device 300, and the server 100 manages the contract for each use condition processing device 300 and Kw, and generates individual information for each use condition processing device based on the contract status. Do. The generated individual information is encrypted with Km assigned to each use condition processing device. Kc is also managed, common information is generated for each content, and encrypted by Kw. Furthermore, the contents are managed and encrypted by Kc. These individual information, common information, and content are transmitted to the receiving device 200 via broadcast or communication. However, the individual information is periodically transmitted only to the receiving apparatus 200 with a contract. While there is no change in the contract, the same individual information is transmitted, and when the contract expiration date is changed, such as when the contract is extended, the individual information with a new contract expiration date is transmitted. The receiving device 200 receives individual information, common information, and content from the server 100 via broadcasting or communication. The display device 210 is a device for displaying content and processing results. The use condition processing device 300 stores the individual information received from the server 100 by the receiving device 200. Also, a license is generated from the individual information and the common information stored in the receiving apparatus 200, and content availability is determined according to the license.

  FIG. 4 is a diagram illustrating a data structure of individual information. In FIG. 4, the individual information 400 includes an individual information ID 401, a contract expiration date 402, and a Kw 403. The individual information ID 401 is an identifier of individual information. The contract expiration date 402 is a contract expiration date indicated by the individual information. Kw 403 is a work key for decrypting the common information. The individual information is generated based on the contract status and is encrypted with Km assigned to each subscriber. It should be noted that the same effect can be obtained by encrypting only secret information such as Kw among the constituent elements of the individual information.

  FIG. 5 is a diagram illustrating a data structure of common information. In FIG. 5, the common information 500 includes a content ID 501, a content usage time limit 502, an individual information ID 503, and Kc 504. The content ID 501 is an identifier of content corresponding to the common information. The content usage time limit 502 indicates the content usage time limit. The individual information ID 503 is an identifier of individual information having Kw for decoding common information. Kc 504 is a content key for decrypting the content indicated by the content ID 501. The common information is generated for each content, and information other than the individual information ID 503 is encrypted with Kw. In addition, the encryption by Kw can obtain the same effect even if only the secret information such as Kc504 is encrypted among the components of the common information.

  FIG. 6 shows the data structure of the license. In FIG. 6, a license 600 includes a license ID 601, a temporary viewing time limit 602, a content usage time limit 603, an individual information ID 604, and Kc 605. The license ID 601 is an identifier of a license generated from the common information 500 when the use condition processing device 300 generates a license. The temporary viewing time limit 602 is a time limit generated and updated by the use condition processing device 300, and is used to determine whether or not content can be used. The content use time limit 603 indicates the content use time limit. When the content usage period 603 has passed, the usage condition processing device 300 determines that the license is invalid and the content cannot be used. The individual information ID 604 is an identifier of individual information having contract information corresponding to the license 600. Kc605 is a content key for decrypting the content corresponding to the license. The use condition processing device 300 generates and records the license 600 according to the individual information 400 and the common information 500. Since the use condition processing device 300 is configured as a secure module, the license is recorded without being encrypted.

  Note that the use condition processing device 300 is typically mounted on a tamper-resistant LSI such as an IC card and connected to the receiving device 200 as shown in FIG. However, the same effect can be obtained even when the receiving apparatus 200 is incorporated as a secure module.

  FIG. 2 is a diagram illustrating a configuration of the receiving device 200. In FIG. 2, the receiving apparatus 200 includes processing result output means 201, content decryption means 202, connection I / F 203, external communication means 204, and storage means 205. The processing result output unit 201 outputs the processing result of the use condition processing device 300 received via the connection I / F 203, the content, and the like to the display device 210. The content decrypting unit 202 decrypts the content using Kc received from the use condition processing device 300 via the connection I / F 203 and outputs the decrypted content to the display device 210 via the processing result output unit 201. The connection I / F 203 is an interface that connects the use condition processing device 300 and the receiving device 200. The external communication unit 204 communicates with the receiving device 200 connected via a network. The storage unit 205 stores common information and content received from the server 100.

  FIG. 3 is a diagram illustrating a configuration of the use condition processing device 300. In FIG. 3, the use condition processing apparatus 300 includes a communication unit 301, a temporary viewing time limit generating unit 302, a use condition determining unit 303, an update determining unit 304, an updating unit 305, a license generating unit 306, and a license transfer. Means 307, license receiving means 308, update request means 309, update instruction means 310, and recording means 311 are provided. The communication unit 301 communicates with the processing result output unit 201, the content decryption unit 202, the external communication unit 204, the storage unit 205, and the like via the connection I / F 203. The temporary viewing time limit generating unit 302 generates a temporary viewing time limit according to the contract expiration date 402 and the content usage time limit 502. The use condition determining unit 303 determines whether or not the content can be used from the temporary viewing time limit 602 included in the license 600. If it is determined that the license can be used, Kc 605 included in the license is transmitted to the content decryption unit 202 via the connection I / F 203. The update determination unit 304 determines the possibility of updating the temporary viewing time limit 602 included in the license 600. The update unit 305 updates the temporary viewing time limit 602 included in the license 600. The license generation unit 306 sets the content usage period 502, the individual information ID 503, and the content usage period 603, the individual information ID 604, and Kc 605 included in the common information 500 stored in the storage unit 205 of the receiving device 200. Then, the temporary viewing time limit 602 is set according to the temporary viewing time limit generated by the temporary viewing time limit generating unit 302, and the license ID 601 is set according to data included in the common information 500 (not shown) to generate the license 600. The license transfer unit 307 transfers the license 600 to the external receiving device 200 via the connection I / F 203 and the external communication unit 204. The license receiving unit 308 receives the license 600 from the external receiving device 200 via the connection I / F 203 and the external communication unit 204, and records it in the recording unit 311. The update request unit 309 transmits an update request for the temporary viewing time limit 602 to the external receiving device 200 via the connection I / F 203 and the external communication unit 204, and receives a response. The update instruction unit 310 receives the update request for the temporary viewing time limit 602 received from the external receiving apparatus 200 via the connection I / F 203 and the external communication unit 204, generates a response according to the update unit 305, and transmits the response. The recording unit 311 records Km, common information 500, license 600, and the like. Typically, Km is embedded in the recording unit 311 at the time of shipment.

  Thereafter, when the components of the use condition processing device 300 communicate with the processing result output unit 201, the content decrypting unit 202, the external communication unit 204, and the storage unit 205, the communication unit 301 and the connection I / F 203 are used. To do. Further, when the component of the use condition processing device 300 communicates with the external receiving device 200, it is assumed that the communication device 300, the connection I / F 203, and the external communication device 204 are used.

  The operation of the server type broadcast system according to the first embodiment will be described in the order of the operation of a receiving device with a contract and the operation of a receiving device without a contract.

1. Operation of Receiving Device with Contract The operation of the receiving device with the contract will be described.

  The receiving device 200 with the contract receives the individual information 400, the common information 500, and the content from the server 100 via communication or broadcasting. The use condition processing device 300 connected to the receiving device 200 with the contract generates a license 600 from the received individual information 400 and common information 500 and transfers the license 600 to the receiving device 200 without the contract. Further, when the update request information of the temporary viewing time limit 602 is received from the receiving device 200 without a contract, the update instruction information is transmitted to the receiving device 200 without a contract. Instead of the update request information, the license 600 transferred from the receiving device 200 without a contract may be received, and the license 600 updated by the use condition processing device 300 may be retransferred to the receiving device 200 without a contract.

  First, a method for storing the individual information 400 and the common information 500 will be described with reference to FIGS.

  When receiving the individual information 400, the receiving apparatus 200 with the contract passes it to the usage condition processing apparatus 300, and the usage condition processing apparatus 300 records it in the recording unit 311. In addition, the receiving device 200 with a contract stores the common information 500 and the content in the storage unit 205 when receiving the content.

  Next, the license generation process will be described with reference to FIG.

  The license generation unit 306 provided in the use condition processing device 300 receives the common information 500 corresponding to the content to be used together with the license generation instruction corresponding to the content to be used from the receiving device 200 (step S701). The license generation unit 306 acquires the individual information 400 corresponding to the common information 500 from the individual information ID 503 included in the common information 500, decrypts it using the Km recorded in the recording unit 311, and sets the contract expiration date 402. Obtain (step S702). The license generation unit 306 decrypts the common information 500 using the Kw 403 included in the decrypted individual information 400, and acquires the content use time limit 503 (step S703). The temporary viewing time limit generating unit 302 generates a temporary viewing time limit according to the contract expiration date 402 and the content usage time limit 502 (step S704). The license generation unit 306 sets the content usage period 502, the individual information ID 503, and the content usage period 603, the individual information ID 604, and the Kc 605 included in the decrypted common information 500, and is generated in step S704. A temporary viewing time limit 602 is set according to the temporary viewing time limit, and a license ID 601 is set according to data included in the common information 500 (not shown) to generate a license (step S705). The license generation unit 306 records the license 600 in the recording unit 311 (step S706).

  Note that the same effect can be obtained when the license generation unit 306 does not include the temporary viewing time limit in the license 600 and the temporary viewing time limit generation unit 302 generates the temporary viewing time limit as separate information associated with the license 600. .

  The temporary viewing time limit generation process (step S704) will be described with reference to FIG.

  The temporary viewing time limit generating means 302 provided in the use condition processing device 300 compares the contract expiration date 402 with the content usage time limit 502 (step S2001). If the contract expiration date 402 is longer than the content usage time limit 502, the temporary viewing time limit generation unit 302 generates the content usage time limit 502 as a temporary viewing time limit (step S2002). If the content usage time limit 502 is longer than the contract expiration date 402, the temporary viewing time limit generation unit 302 generates the contract expiration date 402 as a temporary viewing time limit (step S2003).

  Next, an operation for transferring the license 600 to the receiving apparatus 200 without a contract will be described.

  When receiving the license transfer instruction from the receiving device 200, the license transfer unit 307 provided in the use condition processing device 300 uses the secure communication path for the license 600 recorded in the recording unit 311 to the receiving device 200 without a contract. Forward.

  Note that before the license transfer unit 307 transfers the license 600 to the receiving device 200 without a contract, the license 600 information such as the temporary viewing time limit 602 is output to the display device 210 via the processing result output unit 201, and the user May be transferred after notification. This is useful because the user can confirm the information of the license 600 to be transferred and can guide the subsequent action.

  Next, an operation when the update request information of the temporary viewing time limit 602 is received from the receiving device 200 without a contract will be described with reference to FIG.

  The update instruction unit 310 provided in the use condition processing device 300 receives the update request information including the license 600 from the receiving device 200 without a contract (step S801). The update instruction unit 311 searches the individual information 400 corresponding to the license 600 from the individual information ID 604 of the license 600 included in the update request information (step S802). The update instruction unit 311 acquires the contract expiration date 402 from the retrieved individual information 400 (step S803). The updating unit 305 updates the temporary viewing time limit 602 of the license 600 according to the contract expiration date 402 and the content usage time limit 603 of the license 600 included in the update request information (step S804). The update instruction unit 310 transmits update instruction information including the license 600 with the temporary viewing time limit 602 updated to the receiving apparatus 200 without a contract (step S805).

  The temporary viewing time limit update process (step S804) will be described with reference to FIG.

  The updating unit 305 compares the contract expiration date 402 with the temporary viewing time limit 602 (step S901). If both are equal, the update unit 305 ends the temporary viewing time limit update process. If they are different, the contract expiration date 402 is compared with the content usage time limit 603 (step S902). When the contract expiration date 402 is longer than the content usage time limit 603, the update unit 305 sets the content usage time limit 603 as the temporary viewing time limit 602 (step S903). If the content usage time limit 603 is longer than the contract expiration date 402, the update unit 305 sets the contract expiration date 402 as the temporary viewing time limit 602 (step S904).

  The temporary viewing time limit update process may be executed in accordance with an instruction from the user, a command periodically transmitted from the receiving apparatus 200, or the like.

  FIG. 10 shows the data structure of the update request information. In FIG. 10, the update request information 1000 includes a license 600.

  FIG. 11 shows the data structure of the update instruction information. In FIG. 11, the update instruction information 1100 includes a license 600.

  Note that the license generation unit 306 may store the license generation history in the storage unit 311 immediately after the license generation process or may store the license generation history in the storage unit 205 of the receiving apparatus 200 together with the falsification detection information. In the license generation history, the license ID 601 of the generated license 600 and the history deletion deadline are recorded in association with each other. The history deletion time limit is the same value as the temporary viewing time limit 602 of the license 600. If the license generation history exists, the updating unit 305 ends the temporary viewing time limit update process without updating the temporary viewing time limit 602 if the temporary viewing time limit 602 does not exceed the history deletion time limit in the temporary viewing time limit update processing. . If the temporary viewing time limit 602 exceeds the history deletion time limit, the temporary viewing time limit update process shown in FIG. 9 is executed from step S901.

  Note that the license generation unit 306 may add the device unique ID of the use condition processing apparatus 300 that has generated the license 600 to the license 600 in the license generation processing. When the device unique ID is added to the license 600, the update unit 305 compares the device unique ID of the license 600 with the device unique ID of the use condition processing apparatus 300 including the update unit 305, and if both are the same ID. The update unit 305 performs a temporary viewing time limit update process. When the device unique ID of the license 600 is different from the device unique ID of the use condition processing apparatus 300 including the update unit 305, the update unit 305 does not perform the temporary viewing time limit update process. When the license generation history exists, if the device unique ID of the license 600 and the device unique ID of the use condition processing apparatus 300 including the update unit 305 are the same ID, the update unit 305 determines that the temporary viewing time limit 602 and the license generation Temporary viewing deadline update processing is performed without comparing the history deletion deadlines of the history. Further, if there is a license generation history, if the device unique ID of the license 600 and the device unique ID of the use condition processing apparatus 300 including the update unit 305 are different IDs, the temporary viewing time limit 602 and the history deletion time limit of the license generation history If the temporary viewing deadline 602 has not exceeded the history deletion deadline, the temporary viewing deadline update process is terminated without updating the temporary viewing deadline 602, and the temporary viewing deadline 602 exceeds the history deletion deadline. The temporary viewing time limit update process shown in FIG. 9 is executed from step S901.

  The above is the operation of the receiving apparatus 200 with a contract.

2. Operation of Receiving Device without Contract The operation of the receiving device without a contract will be described.

  The receiving device 200 without a contract receives a license 600 from the receiving device 200 with a contract, and uses the content using the license 600. The usage condition processing device 300 connected to a receiving device without a contract performs content usage condition determination according to the license 600. Further, the possibility of updating the temporary viewing deadline 602 of the license 600 is determined, and if there is a possibility of updating, the update request information 1000 for the temporary viewing deadline 602 is transmitted to the receiving apparatus 200 with the contract, and there is a contract. The update instruction information 1100 is received from the reception device 200 as a response, and the license 600 included in the update instruction information 1100 is overwritten and saved.

  First, an operation of receiving the license 600 from the receiving device 200 with a contract will be described.

  The license receiving unit 308 provided in the use condition processing device 300 receives the license 600 from the receiving device 200 with a contract through a secure communication path, and records it in the recording unit 311.

  Next, an operation using content will be described with reference to FIG.

  When receiving the content use request from the receiving device 200, the use condition determining unit 303 provided in the use condition processing device 300 acquires the license 600 from the recording unit 311 (step S1201). The use condition determination unit 303 performs use condition determination according to the license 600 (step S1202). If the license 600 is valid, the use condition determining unit 303 proceeds to the next step (step S1203), and if invalid, ends the processing. When the license 600 is valid, the use condition determining unit 303 transmits Kc605 to the content decrypting unit 202 (step S1204). The content decryption unit 202 that has received the Kc 605 decrypts the content corresponding to the license 600 stored in the storage unit 205 using the Kc 605, and outputs it to the display device 210 via the processing result output unit 201 (step S1205). However, in order to search for content corresponding to the license 600, the receiving apparatus 200 holds data (not shown) indicating the correspondence between the license 600 and the content, and uses this data.

  Note that the usage condition determination unit 303 may output a usage condition determination result indicating whether the license 600 is valid or invalid to the display device 210 via the processing result output unit 201. The user who is notified of the use condition determination result can take action such as deleting an invalid license, which is useful.

  Note that a valid / invalid flag may be added to the license 600, and for example, 1 may be recorded when the license 600 is valid, and 0 may be recorded when the license 600 is invalid. The initial value of the flag is recorded by the license generation unit 306 when the license 600 is generated. Thereafter, the use condition determining unit 303 updates the flag in the use condition determining process. The use condition determining unit 303 first checks the valid / invalid flag in the use condition determining process. When the flag indicates invalidity, it is possible to determine that the license 600 is invalid without comparing the temporary viewing time limit with the current time, which is efficient.

  Note that in step S1205, the content decrypting unit 202 may search for content corresponding to the license 600 by adding a content ID to the license 600 and searching from the content ID.

  Next, usage condition determination processing (step S1202) will be described with reference to FIG.

  The use condition determination unit 303 compares the temporary viewing time limit 602 included in the license 600 with the current time (step S1301). However, the current time is included in the content use request transmitted from the receiving device 200, and the receiving device 200 holds a secure clock (not shown) or obtains the current time from the server 100 using a secure communication path. It shall be. If the temporary viewing time limit 602 has not reached the current time, the use condition determination unit 303 determines that the license 600 is valid and ends the process (step S1302). When the temporary viewing time limit 602 has passed the current time, the use condition determining unit 303 performs a temporary viewing time limit update determination (step S1303). The use condition determination unit 303 outputs the temporary viewing time limit update determination result to the display device 210 via the processing result output unit 201 (step S1304), determines that the license 600 is invalid, and ends the processing (step S1305). ).

  Next, the temporary viewing time limit update determination process (step S1303) will be described with reference to FIG.

  The update determination unit 304 compares the content usage time limit 603 with the current time (step S1401). If the content use time limit 603 has not reached the current time, the update determination unit 304 determines that the temporary viewing time limit 602 has an update possibility, and ends (step S1402). If the content usage time limit 603 has passed the current time, the update determination unit 304 determines that the temporary viewing time limit 602 has no possibility of updating, and ends (step S1403).

  In step S1304, the user who is notified of the result of the temporary viewing time limit update determination determines whether or not to update the temporary viewing time limit. When the user decides to execute the update, an update request process is performed.

  Note that the same effect can be obtained by determining whether or not the receiving apparatus 200 without a contract performs the update request process without executing step S1304 and not notifying the user of the result of the temporary viewing time limit update determination.

  Next, the update request process will be described with reference to FIG.

  The update request unit 309 transmits the update request information 1000 to the receiving device 200 with a contract (step S2401). The update request unit 309 receives the update instruction information 1100 from the receiving device 200 with the contract, and records the license 600 included in the update instruction information 1100 in the recording unit 311 (step S2402). If a copy of the license 600 is recorded in the recording unit 311 in step S2402, the update request unit 309 overwrites and saves the license 600.

  Note that the use condition determination process and the update request process may be executed continuously. For example, when the receiving apparatus 200 determines whether to perform an update request process, it is efficient to execute it continuously.

  The operation when the usage condition process and the update request process are executed successively will be described with reference to FIG.

  The use condition determining unit 303 compares the temporary viewing time limit 602 with the current time (step S2301). If the temporary viewing time limit 602 has not reached the current time, the use condition determining unit 303 determines that the license is valid (step S2302) and ends the process. When the temporary viewing time limit 602 has passed the current time, the updating unit 305 performs a temporary viewing time limit update determination (step S2303). If the update means 305 determines that there is a possibility of updating the temporary viewing deadline 602, the use condition determination means 303 proceeds to the next step (step S2304), and if it is determined that there is no possibility, the use condition is determined. The determination unit 303 determines that the license 600 is invalid (step S2308) and ends the process. When it is determined that there is a possibility of updating the temporary viewing time limit 602, the update request unit 309 performs an update request process (step S2305). The use condition determining unit 303 determines whether or not the temporary viewing time limit 602 has been updated (step S2306). When the temporary viewing time limit 602 has been updated, the use condition determination unit 303 proceeds to the next step. If not updated, the use condition determining unit 303 determines that the license 600 is invalid (step S2308), and ends the process. The use condition determining unit 303 compares the temporary viewing time limit 602 with the current time (step S2307). If the temporary viewing time limit 602 has not reached the current time, the use condition determining unit 303 determines that the license 600 is valid and ends the process (step S2302). If the temporary viewing time limit 602 has passed the current time, the use condition determination unit 303 determines that the license 600 is invalid (step S2308), and ends the process.

  After step S2303, when the update unit 305 outputs the result of the temporary viewing time limit update determination to the display device 210 via the processing result output unit 201, the user can know the result of the temporary viewing time limit update determination. Useful.

  Note that the temporary viewing time limit update determination process may be performed at an arbitrary timing such as immediately after the use of the content. Further, the update request process may be continuously performed according to the result of the temporary viewing time limit update determination process. If the temporary viewing deadline can be updated between the use of the content and the next use of the content, the temporary viewing deadline update determination process and the update request processing are not executed when the content is used next time. There is a possibility that the content can be used, and it is efficient.

  In step S1304 in FIG. 13, the user who is notified of the result of the temporary viewing time limit update determination may determine whether or not to transmit the license 600 to the receiving device 200 with the contract. When it is determined to transmit, the license transfer means 307 provided in the use condition processing apparatus 300 connected to the receiving apparatus 200 without a contract transmits the license 600 to the receiving apparatus 200 with a contract using a secure communication path. To do. In the use condition processing device 300 connected to the receiving device 200 with the contract, the license receiving unit 308 receives the license 600, and then receives instructions from the user, immediately after receiving the license 600, and periodically transmitted from the receiving device 200. The update unit 305 updates the temporary viewing time limit 602 included in the license 600 at any one timing of the command. Thereafter, in accordance with a user instruction, the license transfer means 307 provided in the use condition processing device 300 connected to the receiving device 200 with the contract transfers the updated license 600 to the receiving device 200 without the contract again. The update unit 305 provided in the use condition processing device 300 connected to the receiving device 200 with the contract outputs the temporary viewing time limit update result to the display device 210 via the processing result output unit 201, and the user According to the notified result, it may be determined to transfer the license 600 again to the receiving apparatus 200 without a contract. Through the above operation, the user can use the license 600 with the temporary viewing time limit 602 updated in the receiving apparatus 200 without a contract without performing the update request process.

  The above is the operation of the receiving apparatus 200 without a contract.

  Next, variations of the update request information will be described with reference to FIGS. 15 and 16.

  FIG. 15 is a diagram illustrating a data structure of the first variation of the update request information. In FIG. 15, the update request information 1500 includes a license ID 601 and a content usage time limit 603.

  In this case, in step S2401 of the update request processing shown in FIG. 24, the update request unit 309 provided in the use condition processing device 300 connected to the receiving device 200 without a contract, the license ID 601 included in the license 600, the content Update request information 1500 is generated from the expiration date 603 and transmitted to the receiving apparatus 200 with the contract.

  Further, in step S802 of the update instruction process shown in FIG. 8, the update instruction means 310 provided in the use condition processing apparatus 300 connected to the receiving apparatus 200 with the contract responds from the license ID 601 included in the update request information 1500. Common information 500 to be searched, and the corresponding individual information 400 is searched from the individual information ID 503 included in the searched common information 500.

  By the above operation, the same effect as that of the update request information 1000 can be obtained for the update request information 1500.

  FIG. 16 is a diagram illustrating a data structure of the second variation of the update request information. In FIG. 16, the update request information 1600 includes a license ID 601.

  In this case, in step S2401 of the update request process illustrated in FIG. 24, the update request unit 309 provided in the use condition processing apparatus 300 connected to the receiving apparatus 200 without a contract requests an update request from the license ID 601 included in the license 600. Information 1600 is generated and transmitted to the receiving apparatus 200 with the contract.

  Further, in step S802 of the update instruction process shown in FIG. 8, the update instruction means 310 provided in the use condition processing apparatus 300 connected to the receiving apparatus 200 with the contract responds from the license ID 601 included in the update request information 1600. Common information 500 to be searched, and the corresponding individual information 400 is searched from the individual information ID 503 included in the searched common information 500. Further, using the Kw 403 included in the retrieved individual information 400, the common information 500 is decrypted, and the content usage period 502 is acquired. Here, the content use time limit 502 is information equivalent to the content use time limit 603 included in the license 600. If the content usage period 502 is not encrypted in the common information 500, the decryption process of the common information 500 can be omitted.

  The update instructing means 310 searches for the corresponding common information 500 from the license ID 601 as long as the receiving apparatus 200 holds data (not shown) indicating the correspondence between the license 600 and the content. Since a content ID corresponding to the ID 601 can be acquired, a method of searching the common information 500 using this content ID may be used, or another method may be used.

  By the above operation, the same effect as that of the update request information 1000 can be obtained for the update request information 1600.

  Note that the update request information 1500 and the update request information 1600 may be content IDs of contents to be used instead of the license ID 601. In this case, in step S802 of the update instruction process shown in FIG. 8, the update instruction means 310 provided in the use condition processing apparatus 300 connected to the receiving apparatus 200 with the contract searches the corresponding common information 500 from the content ID. The same effect can be obtained by searching the corresponding individual information 400 from the individual information ID 503 included in the searched common information 500.

  This completes the description of the variation of the update request information.

  Next, variations of the update instruction information will be described with reference to FIGS.

  FIG. 17 is a diagram illustrating a data structure of the first variation of the update instruction information. In FIG. 17, the update instruction information 1700 includes a license ID 601 and a temporary viewing time limit 602.

  In this case, in step S805 of the update instruction process illustrated in FIG. 8, the update instruction unit 310 provided in the use condition processing apparatus 300 connected to the receiving apparatus 200 with the contract is temporarily updated by the update unit 305 in step S804. The update instruction information 1700 is generated from the viewing time limit 602 and the license ID 601 included in the update request information 1000, and transmitted to the receiving apparatus 200 without a contract.

  In step S2402 of the update request process illustrated in FIG. 24, the update request unit 309 provided in the use condition processing apparatus 300 connected to the non-contracted receiving apparatus 200 updates the update instruction information 1700 from the receiving apparatus 200 with the contract. And the temporary viewing time limit 602 of the update instruction information 1700 is overwritten with the temporary viewing time limit 602 of the license 600.

  By the above operation, the same effect as the update instruction information 1100 can be obtained for the update instruction information 1700.

  FIG. 18 is a diagram illustrating a data structure of the second variation of the update instruction information. In FIG. 18, the update instruction information 1800 includes a license ID 601 and a contract expiration date 402.

  In this case, in step S805 of the update instruction process shown in FIG. 8, the update instruction unit 310 provided in the use condition processing apparatus 300 connected to the receiving apparatus 200 with the contract uses the individual information 400 retrieved from the update request information 1000. Update instruction information 1800 is generated from the contract expiration date 402 and transmitted to the receiving apparatus 200 without a contract. In this case, the temporary viewing time limit update process (step S804) is not executed.

  In step S2402 of the update request process illustrated in FIG. 24, the update request unit 309 provided in the use condition processing apparatus 300 connected to the non-contracted receiving apparatus 200 updates the update instruction information 1800 from the receiving apparatus 200 with the contract. Receive. Next, the update means 305 provided in the use condition processing device 300 connected to the receiving device 200 without a contract temporarily stores the license 600 based on the contract expiration date 402 of the update instruction information 1800 and the content usage date 603 of the license 600. Perform viewing time limit update processing. The temporary viewing time limit update process has already been described with reference to FIG.

  With the above operation, the same effect as the update instruction information 1100 can be obtained for the update instruction information 1800.

  FIG. 19 is a diagram illustrating a data structure of the third variation of the update instruction information. However, the third variation of the update instruction information is applicable only when the temporary viewing time limit is not updated in step S804 of the update instruction process shown in FIG. In FIG. 19, the update instruction information 1900 includes a license ID 601 and non-updatable information 1901. The non-updatable information 1901 indicates that the temporary viewing time limit cannot be updated. For example, the non-updatable information may be a value of -1.

  In this case, in step S805 of the update instruction process shown in FIG. 8, the update instruction means 310 provided in the use condition processing apparatus 300 connected to the receiving apparatus 200 with the contract generates update instruction information 1900.

  In step S2402 of the update request process illustrated in FIG. 24, the update request unit 309 provided in the use condition processing apparatus 300 connected to the non-contracted receiving apparatus 200 updates the update instruction information 1900 from the receiving apparatus 200 with the contract. As soon as the update request is received, the update request process is terminated.

  In the update instruction information 1700, the update instruction information 1800, and the update instruction information 1900, the license ID 601 may be a content ID. In this case, in step S802 of the update instruction process shown in FIG. 8, the update instruction means 310 provided in the use condition processing apparatus 300 connected to the receiving apparatus 200 with the contract searches the corresponding common information 500 from the content ID. If the corresponding individual information 400 is searched from the individual information ID 503 included in the common information 500, the same effect can be obtained.

  By the above operation, the same effect as in the case of the update instruction information 1100 can be obtained for the update instruction information 1700 and the update instruction information 1800. Also, in the receiving apparatus 200 with a contract, if the temporary viewing time limit 602 of the license 600 is not updated, the update instruction information 1900 can obtain the same effect as the update instruction information 1100. However, the receiving apparatus 200 without a contract needs to record a copy of the license 600 before transmitting the update request information 1000.

  This completes the description of the variation of the update instruction information.

  Next, a temporary viewing time limit updating method using the content use start date will be described.

  FIG. 22 is a diagram illustrating a data structure of a license including a content use start date. In FIG. 22, the license 2200 includes a license ID 601, a temporary viewing time limit 602, a content usage time limit 603, an individual information ID 604, Kc 605, a content usage start date 2201, and a content validity period 2202. The content use start date 2201 indicates the date and time when the use of the content is started. The content valid period 2202 is a valid period of content indicated by a relative period from the content use start date 2201. It is also a condition for the license to be valid that the current time does not exceed the time limit calculated from the content use start date and the content expiration date. Further, since the content use start date is information set at least once after using the content, an indefinite value is set at the license generation timing. The content use start date is set by means (not shown) provided in the use condition processing apparatus 300 immediately after or immediately before using the content.

  In this case, the update unit 305 determines the earliest time limit from among the time limit calculated from the content use start date 2201 and the content valid period 2202, the contract valid date 402, and the content use time limit 502 in the temporary viewing time limit update process. Is set as the temporary viewing deadline 602 after the update.

  Of course, the temporary viewing time limit may be generated or updated using information generated according to the usage status of the content other than the content usage start date.

  With the above operation, the method of generating and updating the temporary viewing time limit using the content use start date can provide the same effect as the method not using the content use start date. However, when a method for generating and updating the temporary viewing time limit using the content use start date is used, the update request unit 309 provided in the use condition processing device 300 connected to the receiving device 200 without a contract is shown in FIG. When the update request information 1500 shown in FIG. 15 or the update request information 1600 shown in FIG. 16 is transmitted, the update instruction means 310 provided in the use condition processing device 300 connected to the receiving device 200 with a contract is shown in FIG. The update instruction information 1700 shown in FIG. 11 cannot be transmitted, and the update instruction information 1100 shown in FIG. 11, the update instruction information 1800 shown in FIG. 18, or the update instruction information 1900 shown in FIG. 19 must be sent.

  This completes the description of the temporary viewing time limit update method using the content use start date.

  Next, variations of content usage conditions will be described.

  The content usage conditions are not limited to the conditions related to the time limit such as the contract expiration date and the content usage time limit, but may be conditions related to the number of times.

  For example, the individual information 400 may include the number of contracts, and the common information 500 may include the maximum content usage count. The number of contracts is the maximum number of times of use of all the contents that can be used in a contract. The content maximum usage count is the maximum usage count determined for each content. In this case, the temporary viewing count is added to the license 600 of FIG. 6, and the use condition processing device 300 includes a temporary viewing count generating unit. The temporary viewing number generation means sets a smaller number of the contract number and the maximum content usage number as the temporary viewing number of the license 600. Further, the use condition determining unit 303 determines that the license 600 is valid when the number of times of temporary viewing is 1 or more, and the updating unit 305 updates the number of times of temporary viewing that is less than the number of contracts and the maximum number of times of use of content. To the license 600. Further, in the update request information 1000, the update instruction information 1100, and the update instruction information 1800, the contract expiration date 402 is the number of contracts, the update request information 1000, the update instruction information 1100, and the update request information 1500, the content usage time limit 603. The same effect can be obtained by replacing with the maximum number of times the content is used.

  Note that the conditions regarding the time limit and the number of times may be included at the same time as the content use conditions. In this case, the license 600 includes both the temporary viewing time limit 602 and the number of temporary viewing times, the usage condition determining unit 303 uses the temporary viewing time limit 602 and the temporary viewing number for the usage condition determination, and the updating unit 305 includes the temporary viewing time limit 602. Update the number of temporary views. In the update request information and update instruction information, if the contract expiration date 403 is included, the number of contracts is added, and if the content usage time limit 603 is included, the maximum content usage count is added.

  In addition, as usage conditions for content, the individual information 400 may include a condition regarding a time limit, and the common information 500 may include a condition regarding the number of times. For example, the contract expiration date 402 is included in the individual information 400, and the maximum number of times of content is included in the common information 500. In this case, the temporary viewing time limit generating unit 302 generates the contract expiration date 402 as the temporary viewing time limit 602. Further, the use condition determining unit 303 determines that the license 600 is valid when the current time does not pass the temporary viewing deadline 602 and the maximum number of times of use of content is one or more. The updating unit 305 sets the contract expiration date 402 as the updated temporary viewing time limit 602. In the update request information, when the content usage time limit 603 is included, the content usage time limit 603 is replaced with the maximum content usage count.

  With the above operation, even when the condition regarding the number of times is included as the content use condition, the same effect as that when the condition is not included can be obtained.

  This completes the description of the content usage condition variations.

  In the first embodiment, if the receiving apparatus 200 with a contract and the receiving apparatus 200 without a contract are not connected via a communication path, a new connection I / F is added to the receiving apparatus 200. When the usage condition processing apparatus 300 with a contract is connected to the connection I / F 203, when the usage condition processing apparatus 300 without a contract is connected to the added connection I / F, the contract with the usage condition processing apparatus 300 with a contract is established. The non-use condition processing apparatus 300 can communicate via the communication means 301, the connection I / F 203, and the added connection I / F, and the same effect can be obtained. In this case, for example, it can be realized when the user inserts the use condition processing device 300 configured as an IC card into the receiving device 200. However, in the case where the use condition determination process and the update request process are executed continuously as in the process described with reference to FIG. 23, the use condition processing apparatus 300 with a contract in advance and the use condition processing apparatus without a contract are used. It is necessary to connect 300 to the same receiving apparatus 200.

  The same effect can be obtained even when the receiving device 200 with a contract and the receiving device 200 without a contract are connected via a device such as the server 100.

  As described above, according to the first embodiment, when the current time does not exceed the temporary viewing time limit 602, both the contract expiration date 402 and the content usage time limit 502 are not exceeded. That is, when the current time does not exceed the temporary viewing time limit 602, the content usage condition is satisfied. Therefore, by transferring and using the license 600 having the temporary viewing time limit 602 to the receiving device 200 without a contract, the content can be used also in the receiving device 200 without the contract information 400 and without the contract.

  In addition, when the contract expiration date 402 is extended and updated in the receiving device 200 with the contract, such as when the user extends the contract, the temporary viewing time limit 602 of the license 600 transferred to the receiving device 200 without the contract is also updated. You may have to do that. According to the first embodiment, since the update possibility of the temporary viewing time limit 602 can be determined using the content usage time limit 603 and the temporary viewing time limit 602 of the license 600, the temporary viewing time limit 602 is set according to the determination result of the update possibility. It can be updated.

(Embodiment 2)
In the second embodiment, the configuration and operation of the entire system are different from the first embodiment only in the transmission method of the individual information 400, the temporary viewing time limit generation process, the temporary viewing time limit update process, and the variation of the update instruction information. Therefore, the processing and data different from those of the first embodiment will be mainly described. 1 to 8, 10 to 17, 19, and 22 to 24 are incorporated from the first embodiment.

  In the second embodiment, as in the first embodiment, a case where the license 600 generated by the receiving device 200 with the contract is transferred to the receiving device 200 without the contract and used is taken as an example. In addition, it is assumed that the user can arbitrarily update the contract, such as extending or canceling the contract, at the receiving apparatus with the contract.

  First, a method for transmitting individual information 400 in Embodiment 2 will be described.

  In FIG. 1, in order to reduce the processing load of the server 100 and the contracted receiving apparatus 200 and the communication bandwidth to be used, the server 100 is configured to reduce the transmission frequency of the individual information 400. Individual information 400 in which a time limit longer than the actual contract time limit is set as the contract expiration date 402 in advance is transmitted. This preset deadline is referred to as the contract deadline. If there is no change in the user's contract at a certain date and time before reaching the contract expiration date, the server 100 sends the individual information 400 in which the contract expiration date 402 is set as the contract expiration date 402 to the receiving apparatus 200 with the contract. Send.

  Here, consider a case where the user cancels the contract in the receiving apparatus 200 with the contract.

  In this case, the individual information 400 including the contract expiration date 402 whose time limit has been shortened from the server 100 to the contract renewal date is transmitted to the receiving apparatus 200 with the contract, and the individual information 400 is overwritten and updated. However, the license 600 generated by the receiving device 200 with the contract before the contract cancellation and transferred to the receiving device 200 without the contract is generated based on the contract expiration date before the contract cancellation, and the temporary viewing time limit 602 May include the period after termination of the contract. In this case, the user can use the content until the temporary viewing time limit 602 passes even during the period after the contract cancellation, which is disadvantageous for the service provider. Here, the contract renewal date is a date or date when the contract is renewed between the service provider and the user, and contract extension or contract cancellation is performed on this contract renewal date. As the contract renewal date, conditions such as the end of the month and the weekend can be designated in addition to the date and date.

  In order to solve the above problem, the contract renewal date information is newly used in the second embodiment.

  First, the contract renewal date information will be described with reference to FIG. The contract renewal date information is transmitted from the server 100 to the receiving apparatus 200 with the contract, like the individual information 400. Whenever there is a change in the contract renewal date, it is transmitted from the server 100 to the receiving apparatus 200 with the contract.

  FIG. 21 is a diagram illustrating a data structure of contract update date information. In FIG. 21, the contract update date information 2100 includes a contract update date 2101.

  The same effect can be obtained even if the contract renewal date 2101 is included in the individual information 400. Further, the contract renewal date information may be set for each service provider or may be set for each contract.

  Next, a temporary viewing time limit generation process using the contract renewal date information 2100 will be described.

  In the temporary viewing time limit generation process, the temporary viewing time limit generating unit 302 generates, as the temporary viewing time limit, the date and time that reaches the earliest date among the contract expiration date 402, the content usage time limit 502, and the contract renewal date 2101.

  Next, the temporary viewing time limit update process will be described.

  The update unit 305 sets the earliest date / time of the contract expiration date 402, the content usage date 502, and the contract update date 2101 as the temporary viewing time limit 602 after updating to the license 600 in the temporary viewing time limit update process.

  Next, variations of the update instruction information will be described.

  The update instruction information 1800 used as the second variation of the update instruction information in the first embodiment cannot be applied in the second embodiment. In the second embodiment, update instruction information 2500 shown in FIG. 25 is used as a fourth variation of the update instruction information instead of the update instruction information 1800 shown in FIG. In FIG. 25, the update instruction information 2500 includes a license ID 601, a contract expiration date 402, and a contract update date 2101.

  In this case, in step S805 of the update instruction process shown in FIG. 8, the update instruction unit 310 provided in the use condition processing apparatus 300 connected to the receiving apparatus 200 with the contract uses the individual information 400 retrieved from the update request information 1000. Update instruction information 2500 is generated from the contract expiration date 402 and the contract renewal date 2101, and is transmitted to the receiving apparatus 200 without a contract.

  In step S2402 of the update request process shown in FIG. 24, the update request unit 309 provided in the use condition processing apparatus 300 connected to the non-contracted receiving apparatus 200 receives the update instruction information 2500 from the receiving apparatus 200 with the contract. Is received from the contract expiration date 402 and the contract renewal date 2101 of the update instruction information 2500 and the content usage time limit 603 of the license 600, and the temporary viewing time limit update process is performed using the update unit 305.

  Also, instead of the update instruction information 1800 used as the second variation of the update instruction information in the first embodiment, the update instruction information 2600 shown in FIG. 26 may be used as the fifth variation of the update instruction information. In FIG. 26, the update instruction information 2600 includes a license ID 601 and a temporary contract expiration date 2601. The temporary contract expiry date is the expiry date that reaches the earliest among the contract expiry date 402 and the contract renewal date 2101.

  In this case, in step S805 of the update instruction process shown in FIG. 8, the update instruction unit 310 provided in the use condition processing apparatus 300 connected to the receiving apparatus 200 with the contract uses the individual information 400 retrieved from the update request information 1000. Of the contract expiration date 402 and the contract renewal date 2101 is generated as a temporary contract expiration date 2601, and update instruction information 2600 is generated from the temporary contract expiration date to the receiving apparatus 200 without a contract. Send.

  In step S2402 of the update request process illustrated in FIG. 24, the update request unit 310 provided in the use condition processing apparatus 300 connected to the non-contracted receiving apparatus 200 receives the update instruction information 2600 from the receiving apparatus 200 with the contract. Is received, the temporary contract expiration date 2601 of the update instruction information 2600 and the content usage time limit 603 of the license 600 are passed to the update unit 305. The update unit 305 sets the date and time reaching the earliest among the temporary contract contract expiration date 2601 of the update instruction information 2600 and the content usage time limit 603 of the license 600 to the license 600 as the updated temporary viewing time limit 602.

  As described above, according to the second embodiment, when the current time does not exceed the temporary viewing time limit 602, both the contract expiration date 402 and the content usage time limit 502 are not exceeded. That is, when the current time does not exceed the temporary viewing time limit 602, the content usage condition is satisfied. Therefore, by transferring and using the license 600 having the temporary viewing time limit 602 to the receiving device 200 without a contract, the content can be used also in the receiving device 200 without the contract information 400 and without the contract.

  When the contract expiration date 402 is shortened to the contract renewal date in the receiving device 200 with a contract, such as when the user cancels the contract, the temporary viewing time limit 602 of the license 600 transferred to the receiving device 200 without the contract. Since the contract renewal date is not exceeded, the user can be prevented from using the content during the period after the contract is canceled.

(Other variations)
Although the present invention has been described based on the above embodiment, it is needless to say that the present invention is not limited to the above embodiment. The following cases are also included in the present invention.

  (1) Each of the above devices is specifically a computer system including a microprocessor, a ROM, a RAM, a hard disk unit, a display unit, a keyboard, a mouse, and the like. A computer program is stored in the RAM or hard disk unit. Each device achieves its functions by the microprocessor operating according to the computer program. Here, the computer program is configured by combining a plurality of instruction codes indicating instructions for the computer in order to achieve a predetermined function.

  (2) A part or all of the components constituting each of the above devices may be configured by one system LSI (Large Scale Integration). The system LSI is a super multifunctional LSI manufactured by integrating a plurality of components on one chip, and specifically, a computer system including a microprocessor, a ROM, a RAM, and the like. . A computer program is stored in the RAM. The system LSI achieves its functions by the microprocessor operating according to the computer program.

  (3) A part or all of the components constituting each of the above devices may be configured as an IC card that can be attached to and detached from each device or a single module. The IC card or the module is a computer system including a microprocessor, a ROM, a RAM, and the like. The IC card or the module may include the super multifunctional LSI described above. The IC card or the module achieves its function by the microprocessor operating according to the computer program. This IC card or this module may have tamper resistance.

  (4) The present invention may be the method described above. Further, the present invention may be a computer program that realizes these methods by a computer, or may be a digital signal composed of the computer program.

  The present invention also provides a computer-readable recording medium such as a flexible disk, hard disk, CD-ROM, MO, DVD, DVD-ROM, DVD-RAM, BD (Blu-ray Disc). ), Recorded in a semiconductor memory or the like. The digital signal may be recorded on these recording media.

  In the present invention, the computer program or the digital signal may be transmitted via an electric communication line, a wireless or wired communication line, a network represented by the Internet, a data broadcast, or the like.

  The present invention may be a computer system including a microprocessor and a memory, wherein the memory stores the computer program, and the microprocessor operates according to the computer program.

  In addition, the program or the digital signal is recorded on the recording medium and transferred, or the program or the digital signal is transferred via the network or the like, and executed by another independent computer system. It is good.

  (5) The above embodiment and the above modifications may be combined.

  The use condition processing device according to the present invention generates a usable license by transferring from a receiving device with a contract to a receiving device without a contract, and even when the contract expiration date is updated in the receiving device with a contract, A content distribution service that determines whether a license can be renewed in a receiving device without a contract, and can renew the license, and restricts the use of the content according to the usage conditions based on the contract and the license usage conditions defined for each content. Useful in fields.

The figure which shows the structure of the whole server type | mold broadcast system of this invention. The figure which shows the structure of the receiver The figure which shows the constitution of the use condition processing device Diagram showing data structure of individual information Diagram showing data structure of common information Diagram showing license data structure The flowchart which shows operation | movement of the license production | generation process which concerns on embodiment of this invention. The flowchart which shows the operation | movement of the update instruction | indication process which concerns on embodiment of this invention. The flowchart which shows operation | movement of the temporary viewing deadline update process which concerns on embodiment of this invention. Diagram showing the data structure of update request information The figure which shows the data structure of update instruction information The flowchart which shows the operation | movement of the content utilization process which concerns on embodiment of this invention. The flowchart which shows the operation | movement of the use condition determination process which concerns on embodiment of this invention. The flowchart which shows operation | movement of the temporary viewing-and-listening deadline update determination process which concerns on embodiment of this invention. The figure which shows the data structure of the 1st variation of update request information The figure which shows the data structure of the 2nd variation of update request information The figure which shows the data structure of the 1st variation of update instruction information The figure which shows the data structure of the 2nd variation of update instruction information The figure which shows the data structure of the 3rd variation of update instruction information The flowchart which shows operation | movement of the temporary viewing time limit production | generation process which concerns on embodiment of this invention. Diagram showing the data structure of contract renewal date information The figure which shows the data structure of the license which includes the contents use start date The flowchart which shows the operation | movement of the use condition determination process which concerns on embodiment of this invention. The flowchart which shows the operation | movement of the update request process which concerns on embodiment of this invention. The figure which shows the data structure of the 4th variation of update instruction information The figure which shows the data structure of the 5th variation of update instruction information

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Server 200 Receiving apparatus 201 Processing result output means 202 Content decoding means 203 Connection I / F
204 External communication means 205 Storage means 210 Display device 300 Usage condition processing device 301 Communication means 302 Temporary viewing time limit generation means 303 Usage condition determination means 304 Update determination means 305 Update means 306 License generation means 307 License transfer means 308 License reception means 309 Update Request means 310 Update instruction means 311 Recording means 400 Individual information 401 Individual information ID
402 Contract expiry date 403 Kw
500 Common information 501 Content ID
502 Content usage time limit included in common information 503 Individual information ID included in common information
504 Kc included in common information
600 license 601 license ID
602 Temporary viewing time limit 603 Content usage time limit included in license 604 Individual information ID included in license
Kc included in 605 license
1000 update request information 1100 update instruction information 1500 first variation of update request information 1600 second variation of update request information 1700 first variation of update instruction information 1800 second variation of update instruction information 1900 update instruction information first 3 variation 1901 non-updatable information 2100 contract renewal date information 2101 contract renewal date 2200 license including content use start date 2201 content use start date 2202 content validity period 2500 fourth update instruction information 2600 update instruction information first 5 Variations 2601 Temporary Contract Expiration Date

Claims (20)

Whether or not the content can be used in accordance with a first license that includes at least one second usage rule, a third usage rule that is generated from the second usage rule, and the second license. Use condition determining means for determining
Update determination means for determining the possibility of updating the third usage condition according to the second usage condition;
A usage condition processing apparatus comprising: a first updating unit configured to update the third usage condition according to the first usage condition and the second usage condition. The usage condition processing device further includes:
The usage condition processing apparatus according to claim 1, further comprising generation means for generating the first license. The usage condition processing device further includes:
The usage condition processing apparatus according to claim 1, further comprising transfer means for transferring the first license to an external apparatus. The usage condition processing device further includes:
Means for receiving update request information including a content identifier that uniquely identifies content or a license identifier that uniquely identifies a license from an external device that does not have the first usage condition;
Search means for searching for at least one of the first use condition and the second use condition corresponding to the content identifier or the license identifier;
The first use condition searched by the search means and the third use condition updated by the first update means according to the first license, or the first use condition searched by the search means, or The use condition processing apparatus according to any one of claims 1 to 3, further comprising update instruction means for transmitting update instruction information including information indicating that updating is not possible. The update request information includes the second usage condition in addition to the content identifier,
The update instruction means includes the first usage condition searched by the search means and the third usage condition updated by the first update means according to the second usage condition included in the update request information, or 5. The usage condition processing apparatus according to claim 4, wherein the first usage conditions searched by the search means or update instruction information including information indicating that updating is impossible is transmitted. The usage condition processing device further includes:
Update request information including a content identifier for uniquely identifying content is transmitted to the external device having the first usage condition, and the third usage condition or the first usage information is transmitted from the external device having the first usage condition. Update request means for receiving update instruction information including information indicating that the use condition of the second use condition or the third use condition cannot be updated;
6. The usage condition processing apparatus according to claim 1, further comprising: a second updating unit configured to update the third usage condition according to the received update instruction information. The usage condition processing apparatus according to claim 6, wherein the second update unit overwrites the third usage condition included in the update instruction information with the third usage condition to be recorded. The second updating means updates the third usage condition recorded by the first updating means according to the first usage condition included in the update instruction information and the second usage condition to be recorded. The use condition processing apparatus according to claim 6, wherein The usage condition processing device further includes:
The usage condition processing apparatus according to claim 6, further comprising a license receiving unit configured to receive the first license. 10. The device according to claim 1, wherein the first use condition, the second use condition, and the third use condition include at least one of a time limit and a number of times. Usage condition processing device. The first updating means is a means for setting the shortest deadline among the deadlines included in the first usage rule and the second usage rule to be a deadline included in the third usage rule, and the first usage The use according to claim 10, further comprising at least one of means for setting a smaller number of times included in the condition and the second use condition to be included in the third use condition. Condition processing device. The third usage condition is generated from contract update date information related to the first usage condition, the second usage condition, and the contract update date, and the first update means includes the first usage condition and the second usage condition. 12. The use according to claim 10, wherein the use period is a means for setting the shortest deadline among the deadline included in the use condition and the contract renewal date information as the deadline included in the third use condition. Condition processing device. 13. The usage condition processing apparatus according to claim 12, wherein the contract update date information is received from broadcasting or communication. 13. The usage condition processing apparatus according to claim 12, wherein the contract update date information is unique to the usage condition processing apparatus. The usage condition processing device further includes:
15. The apparatus according to claim 1, further comprising a unit that outputs at least one of a processing result of the update determination unit, a first updating unit, or a processing result of the second updating unit. The use condition processing apparatus according to any one of the preceding claims. The usage condition processing apparatus according to claim 3, wherein the external device is the usage condition processing apparatus. The external device receives first usage rule information including the first usage rule and second usage rule information including the second usage rule from broadcast or communication; and
The usage condition processing device according to any one of claims 3 to 15, wherein the usage condition processing device is a reception device including a means for outputting a processing result to a display device. The usage condition processing apparatus according to claim 3, wherein the external device is a server that manages the first usage condition. The usage condition processing device according to any one of claims 1 to 18, wherein the usage condition processing device is an IC card. The usage condition processing device according to any one of claims 1 to 18, wherein the usage condition processing device is included in the reception device.

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