JP4978067B2 - Conditional access system and conditional access server - Google Patents

Description

  The present invention relates to a conditional access system, a conditional access server belonging to the conditional access system, and a digital broadcast receiver (a digital television receiver, a recording device such as an HDD / DVD recorder, etc.), and more Specifically, the viewing authority according to the viewing contract related to one conditional access card is made exclusive during the same viewing period, while a plurality of digital broadcast receivers belonging to one conditional access system are used. The present invention relates to a technique for allowing each individual to enjoy a common experience.

  In recent years, many digital television broadcasts are scrambled (encrypted). This is a conditional access system, also called CAS (Conditional Access System), designed for pay broadcasting. Only the customer who has signed the reception contract (viewing contract) can view the broadcast, and the broadcast signal is scrambled so that only the contractor can view it, and the contractor (the receiver) has the encryption key to decrypt this scramble. Provided (generally transmitted on broadcast radio waves).

  An IC card (conditional access card) is required to obtain the encryption key for decrypting the CAS encryption as described above and to view a desired broadcast or program. That is, in order to view B-CAS, which is a CAS of BS digital broadcasting, terrestrial digital broadcasting, and 110-degree CS digital broadcasting in Japan, a BCAS card is required as an IC card, and C-CAS is a CAS of digital cable television. A CCAS card is required to view

  For example, a customer who wants to watch a satellite digital broadcast purchases an antenna and a digital tuner, fills in a predetermined item (viewing and therefore a broadcast or a program desired to purchase) in a reception contract, Alternatively, ask a dealer to perform the same procedure. When the digital broadcasting station receives the reception contract, the registered information is registered in the customer management system, and the EMM is made up of customer-specific information generated based on the registered information and key information for descrambling. (Entitlement Management Message) Data is inserted into the satellite broadcast radio wave as appropriate and transmitted. When the customer receives radio waves from this satellite, the EMM data is written on the IC card set in the digital tuner, thereby enabling the function of releasing the scramble and enabling the viewing of the broadcast or program.

Actually, by temporarily registering via telephone, FAX, or the Internet, the scramble is canceled only for a certain period so that the broadcast or program can be viewed, and the regular registration procedure is performed within this period. Therefore, the request for viewing immediately without waiting for the regular registration procedure based on the reception contract is addressed.
However, even if provisional registration is completed, there is a problem that it is impossible to present a clear date and time for descrambling because EMMs are appropriately transmitted according to the broadcast schedule using radio waves of satellite broadcasting. Methods for dealing with such problems have already been proposed.

  In one proposal, the transmitting side communicates with a receiver used for conditional access on the receiving side, ID information of the receiver, and / or an ID that can identify the receiver. ID acquisition means for capturing information, and scheduled viewing date / time presentation means for generating scheduled date / time information that enables viewing of the service channel based on the ID information captured by the ID acquisition means and presenting the information to the receiving side. By automating the scheduling of EMM transmission, the date and time when scramble is released and viewing is possible is clarified.

Even when the number of viewing contracts increases rapidly, it is possible to present a clear descrambling date and time, and there is no need for the user to repeatedly check whether descrambling has been performed. In such a case, if it is set so that the receiver can receive the corresponding service channel automatically or manually, forgetting to receive EMM data can be prevented (see Patent Document 1).
JP 2002-281471 A (paragraphs 0002 to 0008, paragraph 0035, FIG. 1)

  On the other hand, after a viewing contract is established, in a scene where broadcasting or program viewing is actually performed, a recording device such as a digital television receiver or HDD / DVD recorder controlled by a conditional access card, or In a digital broadcast receiver such as a set-top box, it is common to use a set of a device main body and a conditional access card bundled with the device.

  By the way, in recent years, the spread of digital broadcasting receivers is rapidly expanding due to the low price of digital broadcasting receivers, and it is not uncommon for a plurality of digital broadcasting receivers to be installed in one household. However, if you have subscribed to a paid broadcast or program, the viewing authority is recorded on the conditional access card inserted in the digital broadcast receiver that performed the contract processing. I cannot watch paid broadcasts or programs.

  For example, if you are watching a pay broadcast or program with a digital broadcast receiver in the living room and want to continue watching with a digital broadcast receiver in the bedroom, you can replace the conditional access card from the former digital broadcast receiver to the latter. Although it is possible to view paid broadcasts or programs with other digital broadcast receivers, it is difficult to insert and remove a conditional access card, which is rarely performed under normal usage conditions on this type of equipment, and it is not realistic. Absent.

Even in the above-described proposal in Patent Document 1, there is no recognition of a technical problem from such a viewpoint, and naturally, there is no proposal for a method for dealing with such a problem.
The present invention has been made in view of the situation as described above, and does not require complicated handling such as insertion / extraction operation and movement of the conditional access card, and the viewing authority according to the viewing contract related to the one conditional access card is obtained. Benefits based on the digital broadcasting receivers belonging to a single conditional access system can be enjoyed in common by each individual receiver while complying with the viewing contract so that it is exclusive during the same viewing period. The purpose is to provide technology that enables this.

In order to solve the above-described problems, the present application proposes the following techniques.
(1) A conditional access system in which a conditional access server and a plurality of digital broadcast receivers are connected by a transmission path,
The conditional access server is
A conditional access card interface unit configured to connect a plurality of conditional access cards , and to exchange data with the connected conditional access card;
A digital broadcast receiver interface unit for exchanging data with a plurality of digital broadcast receivers;
It arbitrates data exchange according to the conditional access between a plurality of digital broadcast receiver connected to the conditional access card interface unit connected to a plurality of conditional access card through the digital broadcast receiver interface Te allows the exclusively shared between the multiple connected conditional access cards plurality of digital broadcast receivers that are connected a plurality of viewing authority by the transmission channel by said plurality of digital broadcast receivers When an operation for viewing the same program with the same conditional access card is signed at the same time, the digital broadcast receiver for which the operation was performed in advance Digital broadcast reception that allows viewing and subsequent operation Respect, is configured to include a server side system controller that performs control to transmit a message indicating that another digital broadcast receiver is view exclusively the program with priority, and
The plurality of digital broadcast receivers are:
A tuner for selectively receiving broadcast signals;
A conditional access server interface unit for exchanging data with the conditional access server;
The descrambling process is performed on the broadcast signal received by the tuner unit by receiving the descrambling encryption key data generated by the conditional access card from the conditional access server through the conditional access server interface unit. A descrambling unit to perform,
A conditional access system comprising: a tuner system, a conditional access server interface unit, and a receiver side system controller that controls the scrambling unit.

In the conditional access system of (1) above, a plurality of conditional access servers and a plurality of digital broadcast receivers are connected by a transmission line and connected to the conditional access card interface unit of the conditional access server. Based on the viewing agreement for the program signed on the access card, the server controller on the conditional access server is exclusive for the same conditional access card and the same viewing period between multiple digital broadcast receivers. In such a manner, the arbitration is performed so that the benefit of the viewing authority based on the viewing contract can be enjoyed in common with each individual digital broadcasting receiver while complying with the viewing contract.
Here, in the case of mediation so as to be exclusive, there is an operation of simultaneously viewing the same program for which the viewing contract is concluded with the same conditional access card among the plurality of digital broadcast receivers. When the operation is performed, the digital broadcast receiver that has been operated in advance is allowed to be viewed, and other digital broadcast receivers are connected to the digital broadcast receiver in which the operation has been performed subsequently. Control for transmitting a message to the effect that the program is being viewed preferentially is executed.

( 2 ) When the server side system controller performs an operation for viewing a program for which no viewing contract is concluded on any conditional access card in the digital broadcast receiver, On the other hand, the conditional access system according to (1), wherein a message indicating that the viewing contract is not concluded is transmitted.

In the conditional access system of ( 2 ) above, particularly in the operation by the conditional access system of (1), the server side system controller has a viewing contract concluded for any of the conditional access cards in the digital broadcast receiver. When an operation for viewing a program that has not been viewed is performed, control is executed to transmit a message to the digital broadcast receiver that the viewing contract has not been concluded.
Thus, the user of the digital broadcast receiver can recognize precisely the viewing contract can not turn sets of view because it is not yet fastened (descrambling process can not be executed).

( 3 ) A conditional access server suitable for constructing a conditional access system in which a conditional access server and a plurality of digital broadcast receivers are connected by a transmission line,
A conditional access card interface unit configured to connect a plurality of conditional access cards , and to exchange data with the connected conditional access card;
A digital broadcast receiver interface unit for exchanging data with a plurality of digital broadcast receivers;
It arbitrates data exchange according to the conditional access between a plurality of digital broadcast receiver connected to the conditional access card interface unit connected to a plurality of conditional access card through the digital broadcast receiver interface Te allows the exclusively shared between the multiple connected conditional access cards plurality of digital broadcast receivers that are connected a plurality of viewing authority by the transmission channel by said plurality of digital broadcast receivers When an operation for viewing the same program with the same conditional access card for the same program is performed at the same time, the digital broadcast receiver for which the operation was performed in advance To allow viewing and receive digital broadcasts that are followed by the operation. Against machine, the server system controller that performs control to transmit a message indicating that another digital broadcast receiver is view exclusively the program with priority,
A conditional access server, comprising:

In the conditional access server of ( 3 ) above, a plurality of digital broadcast receivers connected through the broadcast receiver interface unit are fastened to a plurality of conditional access cards connected through the conditional access card interface unit. Based on existing viewing contracts, it is possible to mediate the exchange of data related to conditional access and to share multiple viewing rights by the multiple conditional access cards exclusively among the multiple digital broadcast receivers In order to do so, the server-side system controller executes control.
Here, in the case of mediation so as to be exclusive, there is an operation of simultaneously viewing the same program for which the viewing contract is concluded with the same conditional access card among the plurality of digital broadcast receivers. When the operation is performed, the digital broadcast receiver that has been operated in advance is allowed to be viewed, and other digital broadcast receivers are connected to the digital broadcast receiver in which the operation has been performed subsequently. Control for transmitting a message to the effect that the program is being viewed preferentially is executed.

  As a result, the benefit based on the viewing authority according to the viewing contract related to the one conditional access card can be exclusively obtained during the same viewing period without requiring complicated handling such as insertion and removal of the conditional access card and movement. Thus, while complying with the viewing contract, each of the plurality of digital broadcast receivers belonging to one conditional access system can enjoy the reception in common.

(4) The server-side system controller, in the digital broadcasting receiver, when a row cormorants operation viewing of the program the viewing contract in any conditional access card is not performed is performed, the viewing contract Not The conditional access server according to ( 3 ), wherein a message indicating the conclusion is transmitted.

In the conditional access server of ( 4 ) above, particularly in the operation by the conditional access server of ( 3 ), the server-side system controller has a viewing contract for any conditional access card in the digital broadcast receiver. When an operation for viewing a program that has not been viewed is performed, control is performed to transmit a message indicating that the viewing contract has not been concluded.
Therefore, the user of the digital broadcast receiver can recognize precisely the viewing contract can not turn sets of view because it is not yet fastened (descrambling process can not be executed).

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings to be referred to below, for the sake of convenience, the main part that is the subject of the description is exaggerated as appropriate, and other than the main part is appropriately simplified or omitted.
FIG. 1 is a block diagram showing a conditional access system as an embodiment of the present invention.

  In FIG. 1, a conditional access server 100, a first digital broadcast receiver 200 as a plurality of digital broadcast receivers, and a second digital broadcast receiver 300 are connected by a transmission line 400 to form a conditional access system 10. Has been. The conditional access server 100 is provided with a first card slot 101 and a second card slot 102 so that a conditional access card can be attached to each of them.

  In the conditional access system 10 of FIG. 1, the first card slot 101 is initially handled as a set with the first digital broadcast receiver 200 (usually bundled and distributed as a set. ) A first conditional access card 110 (abbreviated as a first CA card in the figure) is mounted, and the second card slot 102 is initially handled as a set with the second digital broadcast receiver 300. Two conditional access cards 120 (abbreviated as a second CA card in the figure) are attached, but the correspondence between each card slot and the conditional access card attached thereto is limited to the above-described one. It's not that.

Further, the first digital broadcast receiver 200 and the second digital broadcast receiver 300 may be digital television receivers having the same configuration. However, in the technical idea of the present invention, the digital broadcast receiver is not limited to this example, and as described in the present specification, the user can view a broadcast or program for which a viewing contract has been concluded with respect to the conditional access card corresponding to the digital broadcast receiver. For example, it may be a recording device such as an HDD / DVD recorder, a set-top box, or other video equipment including an allowable functional unit.
Note that the transmission line 400 of this example takes the form of a network 420 that includes a hub 410.

  FIG. 2 is a block diagram showing the configuration of the conditional access server 100 in the conditional access system 10 of FIG. The conditional access server 100 includes a first conditional access card interface unit 111 for transmitting / receiving data to / from a plurality of conditional access cards 110 and 120 (abbreviated as a first CA card interface unit in the figure). And a second conditional access card interface unit 121 (abbreviated as a second CA card interface unit in the figure). Each of the first and second conditional access card interface units 111 and 121 has the first and second card slots 101 and 102 described above.

The conditional access server 100 is also provided with a network interface unit 140 as a digital broadcast receiver interface unit for exchanging data with the first and second digital broadcast receivers 200 and 300. The network interface unit 140 is connected to the network 4000 including the hub 410 described with reference to FIG. 1. The first and second conditional access units are connected through the first and second conditional access card interface units 111 and 121. Transfer of data related to conditional access between the access cards 110 and 120 and the first and second digital broadcast receivers 200 and 300 connected through the digital broadcast receiver interface unit (that is, the network interface unit) 140. Control to permit exclusive sharing of a plurality of viewing authorities by the plurality of conditional access cards 110 and 120 between the first and second digital broadcast receivers 200 and 300 Server side A system controller 150 is provided.

  The server-side system controller 150 includes a program that defines basic control algorithms, a ROM 151 that stores data such as necessary control constants and parameters, and an operation sequence in the conditional access server 100. A RAM 152 is used for temporarily holding the status relating to the transition and for use in a required calculation.

  FIG. 3 is a block diagram showing a configuration of a digital broadcast receiver 200 as a first digital broadcast receiver in the conditional access system 10 of FIG. As described above, in the conditional access system 10 assumed in the example of FIG. 1, the digital broadcast receiver 300 as the second digital broadcast receiver is also used as the digital broadcast receiver as the first digital broadcast receiver. 200 has the same configuration.

  The digital broadcast receiver 200 includes a digital tuner 202 as a tuner unit for selectively receiving broadcast signals from an antenna 201, and a packet filter for selecting a transport stream (transport packet) that is an output of the digital tuner 202. 203. Obtaining encryption key data for descrambling generated by the conditional access card 110 (120) from the conditional access server 100, transporting the broadcast signal received by the digital tuner 202 and selected by the packet filter 203 A descrambling unit 204 that executes descrambling processing on the packet using the data of the encryption key is provided.

The digital broadcast receiver 200 further includes an MPEG decoder 205 that performs MPEG decoding on the video and audio data that has been descrambled by the descrambling unit 204, and graphic data for displaying characters and graphics. The graphic rendering unit 206 for generating the image, the image output from the MPEG decoder 205 and the output from the graphic rendering unit 206 are combined to obtain the video output to be supplied to a display (not shown), and the data with the conditional access server 100 Is provided with a network interface unit 208 as a conditional access server interface unit. The graphic drawing unit 206 also has a function of displaying a specific message as will be described later with reference to FIGS. 5 and 6.
The encryption key data for descrambling generated by the conditional access card 110 (120) attached to the conditional access server 100 as described above is supplied to the digital broadcast receiver 200 through the network interface unit 208. Is done.

In addition, a receiver-side system controller 209 is provided for overall control of each unit including the digital tuner 202, the descrambling unit 204, and the network interface unit 208. The receiver-side system controller 209 is provided with a RAM 210 and a ROM 211, and executes necessary processing relating to contents received by the antenna using the RAM 210, while the ROM 211 defines a basic control algorithm. And other data such as necessary control constants and parameters are stored, and these data are read into the receiver-side system controller 209 at a required timing to perform control operations.
A remote control interface unit 213 that receives an operation signal from the remote controller 212 is provided, and various operations by the remote controller 212 are received and supplied to the receiver-side system controller 209, whereby various remote operations are realized.

  FIG. 4 is a conceptual diagram showing a management table managed by the conditional access server 100 of FIG. This management table is set in the RAM 152 of the conditional access server 100 in order to manage the status of the digital broadcast receivers (200, 300) connected to the network 400, and its contents are appropriately set by the server-side system controller 150 in this condition. Updated to reflect the state of the null access system 10. Details will be described later.

  FIG. 5 shows a display example when any of the digital broadcast receivers that have been operated for viewing displays that the other device is preferentially viewing the broadcast or program preferentially. FIG. In the conditional access system 10 of the present invention, the same broadcast or program for which the viewing contract is concluded with respect to the same conditional access card (110 or 120) among a plurality of digital broadcast receivers (200, 300) is simultaneously applied. When an operation for viewing a broadcast or a program is performed, the digital broadcast receiver (200 or 300) preceded by the operation for viewing is allowed to be viewed, and the operation for viewing is subsequently performed. In the digital broadcast receiver (300 or 200) performed in this way, for example, a message such as “This program is being viewed on another device” as shown in FIG. 5 is displayed. Details will be described later with reference to a flowchart.

  FIG. 6 shows a case in which any digital broadcast receiver (200, 300) that has been operated for viewing displays that a broadcast or program for which a viewing contract has not been concluded is about to be viewed. It is a figure showing the example of a display. In the conditional access system 10 of the present invention, when an operation for viewing a broadcast or program for which no viewing contract has been concluded for any of the conditional access cards (110, 120) is performed, the digital broadcast reception is performed. For example, a message such as “A contract is required to view this program” as shown in FIG. 6 is displayed on the device (200, 300), indicating that the viewing contract for viewing has not been concluded. Details will be described later with reference to a flowchart.

  FIG. 7 illustrates the operation of the first or second digital broadcast receiver (200, 300..., Typically simply referred to as digital broadcast receiver 200 in the flowchart of FIG. 7) in the conditional access system of FIG. It is a flowchart. This operation is realized by a general management function related to the operation of the digital broadcast receiver by the receiver-side system controller 209 described with reference to FIG.

  When the viewer turns on the digital broadcast receiver 200 and starts viewing (step S701), a packet from the broadcast wave is received by the antenna 201 (FIG. 3) (step S702). Next, whether or not the received packet includes an ECM message is identified (step S703). When it is identified that the received packet includes an ECM message (step S703: Yes), a conditional access server ("CA server" in the figure) is identified. The ECM message is transmitted to “notation” (step S704).

  In response to the transmission of the ECM message in step S704, a response message sent from the conditional access server is received (step S705). Next, the response message is used to release the scramble applied to the broadcast signal. It is identified whether or not an encryption key (that is, a descrambling key) is included (step S706). If it is determined in step S706 that the descrambling key is included (step S706: Yes), the descrambling key is transferred to the descrambling unit 204 (FIG. 3) (step S707).

  The descrambling unit 204 identifies whether or not the descrambling process has been performed using the descrambling key (step S708). When descrambling processing can be performed with the descrambling key in descrambling section 204 (step S708: Yes), a message indicating “viewing is possible” is transmitted to the conditional access server (step S709), and the descrambled signal is released. To execute an operation for displaying a broadcast (step S710). Thereafter, the process returns to step S702.

On the other hand, when the descrambling process cannot be performed with this descrambling key in step S708 (step S708: No), a message “viewing is impossible” is transmitted to the conditional access server (step S711). Return to.
On the other hand, when it is determined in step S703 described above that the received packet does not include an ECM message (step S703: No), it is then determined whether or not the received packet includes an EMM message. (Step S712). If it is determined in step S712 that the received packet includes an EMM message (step S712: Yes), the EMM message is transmitted to the conditional access server (step S713), and the process returns to step S702.
If it is determined in step S712 that the received packet does not include an EMM message (step S712: No), the process directly returns to step S702.

  When it is determined in step S706 described above that the response message sent from the conditional access server does not include the descrambling key (step S706: No), the response message includes conditional access. It is identified whether or not a new conditional access ID (CAS_ID) from the server is included (step S714).

When it is determined in step S714 that the response message from the conditional access server includes a new CAS_ID (step S714: Yes), the conditional access ID is updated to a new CAS_ID by the response message. (Step S715), the process returns to Step S702.
On the other hand, when it is determined in step S714 that the response message from the conditional access server does not include a new CAS_ID (step S714: No), whether or not the response message includes an exclusive message. Is identified (step S716), and when an exclusive message is included (step S716: Yes), a process for displaying an “exclusive message” as exemplified in FIG. 5 is executed. (Step S717), the operation is terminated.

  On the other hand, when an exclusive message is not included in the response message from the conditional access server in step S716 (step S716: No), then it is identified whether or not the uncontracted message is included in the response message. (Step S718) When an uncontracted message is included (Step S718: Yes), a process for displaying an “uncontracted message” as shown in FIG. 6 is executed. (Step S719), the operation is terminated. If no uncontracted message is included (step S718: No), the process directly returns to step S705.

  As described above with reference to the flowchart of FIG. 7 and the block diagram of FIG. 3, in the digital broadcast receiver according to the embodiment of the present invention, the digital tuner 202 as the tuner unit is selectively used. The received broadcast signal (packet) is subjected to descrambling processing by the descrambling unit 204 using the encryption key data supplied from the conditional access server 100 through the network interface unit 208 as the conditional access server interface unit. To do.

  In the process of acquiring the encryption key, the encryption key generated by the conditional access card (FIG. 2: 110, 120) is received and applied from the conditional access server 100 side. Adhering to the viewing contract so that the benefits based on the viewing rights related to a single conditional access card are exclusive during the same viewing period, without requiring complicated handling such as insertion and removal operations and movement However, it can be enjoyed in common by a plurality of digital broadcast receivers (200, 300) belonging to one conditional access system (FIG. 1:10).

  In addition, the conditional access server interface unit is configured by a network interface unit 208 that transmits and receives data through a network. Therefore, the conditional access server 100 belonging to the conditional access system (FIG. 1: 10) and each of the digital access servers. Necessary data can be exchanged through the network without any trouble without being restricted by the arrangement of each main body with the broadcast receiver (200, 300).

  The receiver-side system controller 209 uses the same broadcast or program for which the other digital broadcast receiver managed by the conditional access server 100 together with its own device has a viewing contract for the same conditional access card. In response to the previous operation for viewing the broadcast or the program, the other device is connected from the conditional access server 100 side through the network interface unit 208 as the conditional access server interface unit. When an exclusive message indicating that the broadcast or program is being watched exclusively is received preferentially, control is executed to display the exclusive message (FIG. 7: step S705 → step S706 → step S714 → Step S 16 → step S717).

  For this reason, the user of the digital broadcast receiver looks at the display as illustrated in FIG. 5 and precedes the same broadcast or program for which the viewing contract is concluded for the same conditional access card. In addition, it is possible to accurately recognize that the broadcast or program cannot be viewed (the descrambling process cannot be performed) due to the presence of a user who is performing an operation for viewing the program.

Furthermore, the receiver-side system controller 209 responds to an operation for viewing a broadcast or program for which no viewing contract has been concluded for any of the conditional access cards. When a non-contracted message indicating that the viewing contract regarding the viewing is not concluded is received from the 100 side through the network interface unit 208 serving as a conditional access server interface unit, control is performed to display the uncontracted message. The process is executed (FIG. 7: Step S705 → Step S706 → Step S714 → Step S716 → Step S718 → Step S719).
For this reason, the user of the digital broadcast receiver cannot view the broadcast or the program because the viewing contract is not concluded by viewing the display illustrated in FIG. 6 (the descrambling process cannot be executed). ) Can be recognized accurately.

8 to 11 are flowcharts related to the operation of the conditional access server (when viewing the broadcast with the digital broadcast receiver 1).
Further, as described above, FIG. 4 is a diagram showing a situation in which the management data in the management table held by the conditional access server changes in relation to the operations of the flowcharts of FIGS. In the case assumed in this description, the device ID 1 corresponds to the digital broadcast receiver 1 and the device ID 2 corresponds to the digital broadcast receiver 2 for the device connected to the conditional access server.

In the flowchart of FIG. 8, after starting the operation, the conditional access server receives a message from the digital broadcast receiver 1 via the network (step S801), and then whether or not the received message includes an ECM message. Is identified (step S802).
In step S802, the management table is in an initial state. Also, the column of the connected conditional access card (“CAS card being connected” in FIG. 4), the column of the authentication status for each conditional access card (“CAS authentication status” in FIG. 4), and the current time point The column of ECM data (“Current ECM data” in FIG. 4) is blank because data is not yet held, and “exclusive flag” data for exclusively restricting viewing of the broadcast based on viewing authority Are both “0”. FIG. 4A.

When it is determined that the message received in step S801 includes an ECM message (step S802: Yes), “current ECM data” (data is not initially retained) in the table data of the device ID1 is received. The one corresponding to the received ECM message is updated (step S803)...
Next, referring to the data related to the conditional access (CAS in FIG. 4) card of the device ID1 in the management table, either one corresponding to the device ID1 (that is, the digital broadcast receiver 1 in the assumed system) is selected. An authentication status identification process is performed to determine whether or not the conditional access card is authenticated (step S804). This process is to identify whether any conditional access card is applied in the viewing state (connected).

  As a result of the identification process in step S804, it is discriminated whether or not any of the conditional access cards has been authenticated (step S805), and when it is identified that it has been authenticated (step S805: Yes), With reference to the data of the device ID 1 in the management table, identification processing is performed to identify which conditional access card is currently connected corresponding to the device ID 1 (step S806).

It should be noted that at the initial stage of viewing with the device (digital broadcast receiver 1) connected to the conditional access server, no conditional access card has been approved. Therefore, at this stage, step S805 is performed. The discrimination result is “No” (step S805: No), and the process proceeds to the flowchart of FIG. 11 described later, in which the connection is indicated by the external page reference symbol “D”.
As a result of the identification processing in step S806, when it is discriminated that the currently connected conditional access card is 1 corresponding to the device ID1 (step S807: Yes), the conditional access card 1 receives it in step S801. The transmitted ECM message is transmitted (step S808).

  In response to the transmission in step S808, the descrambling key transferred from the conditional access card 1 is received (step S809), and then the received descrambling key is transmitted to the digital broadcast receiver 1 (step S810). . Thereafter, the process returns to step S801. On the digital broadcast receiver 1 side, the descrambling key supplied from the conditional access card 1 can be used to execute processing for releasing the scramble applied to the received broadcast data, thereby enabling viewing of the broadcast. .

  In the above operation, in general, the ECM is received at the device side (digital broadcast receiver) at an interval of about 2 seconds and sequentially transmitted to the conditional access server. Therefore, after any conditional access card is once authenticated (in use) corresponding to the device side, as long as viewing continues, the processing from step S801 to step S810 is intermittent. Repeated.

  In the above-described step S807, it is discriminated whether or not the currently connected (authenticated) conditional access card corresponding to the device ID1 is 1, and it is discriminated that the conditional access card is not 1. Sometimes (step S807: No), the ECM message received in step S801 is transmitted to the conditional access card 2 (step S817).

Next, the descrambling key is received from the conditional access card 2 (step S818), the descrambling key is transmitted to the digital broadcast receiver 1 (step S819), and then the process returns to step S801.
On the other hand, when it is identified that the message received in step S801 does not include an ECM message (step S802: No), it is determined whether the received message includes an EMM message (step S811).

  If it is determined in step S811 that the received message includes an EMM message (step S811: Yes), the data related to the conditional access card of the device ID1 in the management table is referred to, and the device ID1 (in this case, digital In response to the broadcast receiver 1), authentication status identification processing is performed to determine whether any of the conditional access cards is authenticated (step S812). This process is to identify whether any conditional access card is applied in the viewing state.

  As a result of the identification process in step S812, it is discriminated whether or not any of the conditional access cards has been authenticated (step S813), and when it is identified that it has been authenticated (step S813: Yes), With reference to the data of the device ID1 in the management table, identification processing is performed to identify which conditional access card is currently connected (authenticated) corresponding to the device ID1 (step S814). If it is discriminated in step S813 that none of the conditional access cards has been authenticated (step S813: No), the process directly returns to step S801.

  It is discriminated whether the identification access result in step S814 is 1 for the currently connected (authenticated) conditional access card corresponding to the device ID1 (step S815), and the connected conditional access is made. When the card is discriminated to be 1 (step S815: Yes), the EMM message received in step S801 is transmitted to the conditional access card 1 (step S816). Thereafter, the process returns to step S801.

  In the above operation, in general, EMMs are received at the device side (digital broadcast receiver) at appropriate times and transmitted sequentially (sequentially) to the conditional access server. Therefore, after any conditional access card is once authenticated (in use) corresponding to the device side, the processing from step S811 to step S816 is intermittent as long as viewing continues. Repeated.

On the other hand, when it is discriminated in step S815 that the currently connected (authenticated) conditional access card corresponding to the device ID1 is not 1 (step S815: No), the conditional access card 2 receives it in step S801. The transmitted EMM message is transmitted (step S820), and then the process returns to step S801.
If it is determined in step S811 that the received message does not include an EMM message (step S811: No), the message received from the digital broadcast receiver 1 in step S801 is “viewable”. "Is identified (step S821).

When it is determined in step S821 that the received message is a “viewable” message (step S821: Yes), the status regarding the data of the device ID1 in the management table is referred to and the current status regarding conditional access is determined. Authentication status identification processing is performed (step S822).
As a result of the identification process in step S822, it is discriminated whether or not the device ID1 data in the management table is already authenticated (step S823). If it is identified as authenticated (step S823: Yes), step The process returns to S801.

On the other hand, when it is identified in step S823 that it has not been authenticated (step S823: No), the process proceeds to the flowchart of FIG. 9 in which the connection is indicated by the external page reference symbol “B”.
Further, when it is determined in the above-described step S821 that the received message is not a “viewable” message (step S821: No), the connection is indicated by the external page reference symbol “C”. Transition to the flowchart shown in FIG.
Further, as described above, in step S805, when the result of the identification processing in step S804 is not authenticated (step S805: No), the connection is indicated by the external page reference symbol “D”. The process proceeds to the flowchart of FIG.

In the above processing flow, the digital broadcast receiver 1 corresponding to the device ID 1 receives the ECM, receives the descrambling key from the conditional access server, and through the determination process that the program can be viewed accordingly. For the first time, a “viewable” message is sent to the conditional access server. That is, the digital broadcast receiver 1 repeatedly transmits a “viewable” message to the conditional access server every time an ECM is received. When viewing is not possible, a message “viewing is not possible” is transmitted.
The conditional access server changes the conditional access authentication status to “authenticated” by the initial “viewable” message. However, since the processing related to the “viewable” message is not required thereafter, the conditional access server of step S823 Processing is provided.

  Next, processing after the external page reference symbol “B” in FIG. 9 will be described. In step S802 in the flowchart of FIG. 8, it is identified that the received message does not include an ECM message (step S802: No), and in step S811, the received message does not include an EMM message. In step S821, the received message is identified as a “viewable” message (step S821: Yes), and then the status relating to the data of the device ID 1 in the management table Referring to FIG. 4, the current authentication status identification processing for conditional access is performed (step S822), and as a result, it is discriminated whether or not the device ID1 data in the management table is authenticated (step S823). When identified as not certified -Up S823: No), the process proceeds to the flowchart of FIG. 9 connected is indicated by page reference symbol "B".

Conditional access status data identified as not authenticated in the device ID1 data in the management table is updated to authenticated (step S901), and then the device ID1 data in the management table is referenced to correspond to the device ID1. Then, identification processing is performed to identify which conditional access card is currently connected (step S902).
It is discriminated whether the identification access result in step S902 indicates that the currently connected (authenticated) conditional access card corresponding to the device ID1 is 1 (step S903), and the connected conditional access is performed. When it is discriminated that the card is 1 (step S903: Yes), an ID request message is transmitted to the conditional access card 1 (step S904).

In response to the ID request message transmitted in step S904, the ID transferred from the conditional access card 1 is received (step S905), and this ID, that is, the CAS_ID representing the conditional access card 1 is received by the digital broadcast receiver. 1 (step S906). Thereafter, the process returns to step S801 in FIG.
On the other hand, when it is discriminated in step S903 that the connected conditional access card is not 1 (step S903: No), an ID request message is transmitted to the conditional access card 2 (step S907).

In response to the ID request message transmitted in step S907, the ID transferred from the conditional access card 2 is received (step S908), and this ID, that is, CAS_ID representing the conditional access card 2 is received by the digital broadcast receiver. 1 (step S909). Thereafter, the process returns to step S801 in FIG.
Next, processing after the external page reference symbol “C” in FIG. 10 will be described. In step S802 in the flowchart of FIG. 8, it is identified that the received message does not include an ECM message (step S802: No), and in step S811, the received message does not include an EMM message. If it is identified (step S811: No), and it is further identified in step S821 that the received message is not a “viewable” message (step S821: No), an external page reference symbol of “C” The process proceeds to the flowchart of FIG.

  After it is identified that the received message is not a “viewable” message (step S821: No), and when the received message is identified as a “viewing impossible” message (step S1001: Yes), Authentication status of whether or not any conditional access card is authenticated corresponding to the device ID1 (in this case, the digital broadcast receiver 1) with reference to the data related to the conditional access card of the device ID1 in the management table Identification processing is performed (step S1002). This process is to identify whether any conditional access card is applied in the viewing state.

As a result of the identification processing in step S1002, it is discriminated whether or not any of the conditional access cards has been authenticated (step S1003), and when it is identified as being authenticated (step S1003: Yes), The data of the device ID 1 in the management table is initialized (step S1004), and the process returns to step S801 in FIG.
On the other hand, when any conditional access card is identified as unauthenticated in step S1003 (step S1003: No), data related to the conditional access card of device ID1 in the management table is referred to, and device ID1 (in this case) Corresponds to the digital broadcast receiver 1) and identifies which card is the currently connected conditional access card (step S1005).

It is discriminated whether or not the result of the identification processing in step S1005 is that the currently connected conditional access card is 1 corresponding to the device ID1 (step S1006), and the currently connected conditional access card is 1. 11 is discriminated (step S1006: Yes), the process proceeds to the flowchart of FIG. 11 in which the connection is indicated by the external page reference symbol “E”.
When it is discriminated in step S1006 that the currently connected conditional access card is not 1 (step S1006: No), the status of the exclusive flag in the data of the device ID 1 in the management table is identified (step S1007).

It is determined whether or not an exclusion flag is set as an identification result in step S1007 (step S1008). When it is determined that an exclusion flag is not set (step S1008: No), the data of the device ID 1 in the management table is initialized. (Step S1009), an uncontracted message is transmitted to the digital broadcast receiver 1 (Step S1010), and then the process returns to Step S801 in FIG.
On the other hand, if it is determined in step S1008 that the exclusion flag is set (step S1008: Yes), the device ID1 data in the management table is initialized (step S1011), and an exclusive message is transmitted to the digital broadcast receiver 1. (Step S1012), and then the process returns to Step S801 in FIG.

  Next, processing after the external page reference symbols “D” and “E” in FIG. 11 will be described. As described above with reference to the flowchart of FIG. 8, any conditional access card is approved at the initial stage of viewing by a device (digital broadcast receiver 1) connected to the conditional access server. Absent. In this initial stage, the discrimination result in the discrimination step S805 as to whether or not any of the conditional access cards has been authenticated is inevitably “No” (step S805: No). Therefore, as shown by the external page reference symbol “D”, the flowchart of FIG. 11 is followed.

  With reference to the device ID2 data in the management table, identification processing is performed to identify the currently connected conditional access card corresponding to the device ID2 (step S1101), and the result of the identification processing in step S1101 Then, it is discriminated whether or not the conditional access card currently connected to the device ID 2 is identified as 1 (step S1102).

  If it is discriminated that the currently connected conditional access card corresponding to the device ID2 is 1 (step S1102: Yes), then the conditional access card of the device ID2 in the management table (abbreviated as CAS in the figure) is related to the card. With reference to the data, authentication status identification processing is performed to determine whether any of the conditional access cards has been authenticated in correspondence with the device ID 2 (that is, the digital broadcast receiver 2 in the assumed system) (step) S1103). This process is to identify whether any conditional access card is applied in the viewing state (connected).

  As a result of the identification processing in step S1103, it is discriminated whether or not any of the conditional access cards is authenticated corresponding to the device ID2 (step S1104), and when it is identified as authenticated (step S1104) In step S1104: Yes, the ECM related to the device ID1 and the ECM related to the device ID2 in the management table are compared (step S1105).

This comparison shows that the device corresponding to the device ID1 (in this example, the digital broadcast receiver 1) and the device corresponding to the device ID2 (in this example, the digital broadcast receiver 2) have the same conditional access card (here, CAS1). And is used to determine whether or not the same program (the same ECM) is to be viewed.
That is, in steps S1101 to S1104, it is determined whether or not the device corresponding to the device ID2 (digital broadcast receiver 2) is watching any program prior to the device corresponding to the device ID1 (digital broadcast receiver 1). When the digital broadcast receiver 2 is already viewing a program using the conditional access card 1, the digital broadcast receiver 1 cannot view with the same conditional access card and the same ECM. .

  The result of the comparison in step S1105 is discriminated (step S1106), and when the two ECMs are different (step S1106: Yes), the conditional access card 1 is associated as data related to the device ID1 in the management table (step S1107). The ECM message received in step S801 (FIG. 8) is transmitted to the conditional access card 1 (step S1108).

  If the ECM is different in S1106 (step S1106: Yes), the device corresponding to the device ID 2 (digital broadcast receiver 2) is already connected to the conditional access card 1 and has been authenticated (in use). Although the device (digital broadcast receiver 1) corresponding to the above is about to start viewing with the same conditional access card 1, since the ECM is different, the digital broadcast receiver 1 shows a program different from the digital broadcast receiver 2. It means that you are going to watch. In such a case, it is allowed to transmit the ECM to the same conditional access card 1.

In response to the transmission of the ECM message in step S1108, the descrambling key transferred from the conditional access card 1 is received (step S1109), and then the received descrambling key is transmitted to the digital broadcast receiver 1 ( Step S1110). Thereafter, the process returns to step S801 (FIG. 8).
On the digital broadcast receiver 1 side, the descrambling key supplied from the conditional access card 1 can be used to execute processing for releasing the scramble applied to the received broadcast data, thereby enabling viewing of the broadcast. .

  On the other hand, when it is discriminated in step S1102 that the currently connected conditional access card corresponding to the device ID2 is not 1 (step S1102: No), and in step S1104, any of the conditional access cards corresponding to the device ID2 When it is discriminated that the conditional access card is also unauthenticated (step S1104: No), the process immediately proceeds to the above-described step S1107.

On the other hand, when it is discriminated in step S1106 that the ECMs related to the device ID1 and the device ID2 in the management table are the same (No in step S1106), the exclusive flag is used as data related to the device ID1 in the management table. Is set to 1 (step S1115), and the process proceeds to step S1121.
The fact that both ECMs are the same in step S1106 means that the device corresponding to the device ID 1 (in this example, the digital broadcast receiver 1) tried to start viewing using the conditional access card 1. Means that the device (digital broadcast receiver 2) corresponding to the device ID 2 is connected to the same conditional access card 1 and is viewing the same program (the same ECM).

Accordingly, it is necessary for the digital broadcast receiver 1 to temporarily hold the exclusive access card 1 for the conditional access card 1, and then viewing with the conditional access card 2 is attempted.
As described with reference to the flowchart of FIG. 10, when it is discriminated that the authenticated conditional access card is 1 (step S <b> 1006: Yes), the connection is indicated by the external page reference symbol “E”. 11 (step S1121). In step S1121, authentication status identification processing is performed to determine whether any of the conditional access cards is authenticated corresponding to the device ID2 (in this case, the digital broadcast receiver 2).

As a result of the authentication status identification process in step S1121, it is discriminated whether or not the conditional access card currently connected to the device ID2 is identified as 2 (step S1122).
If it is discriminated that the currently connected conditional access card is 2 corresponding to the device ID 2 (step S1122: Yes), then the conditional access card of the device ID 2 in the management table (abbreviated as CAS in the figure) is related to the card. With reference to the data, authentication status identification processing is performed to determine whether any of the conditional access cards has been authenticated in correspondence with the device ID 2 (that is, the digital broadcast receiver 2 in the assumed system) (step) S1123). This process is to identify whether any conditional access card is applied in the viewing state (connected).

As a result of the identification processing in step S1123, it is discriminated whether or not any conditional access card has been authenticated corresponding to the device ID2 (step S1124), and when it is identified as authenticated (step S1124) In step S1124: Yes, the ECM related to the device ID1 and the ECM related to the device ID2 in the management table are compared (step S1125).
The comparison in step S1125 shows that the device corresponding to the device ID1 (in this example, the digital broadcast receiver 1) and the device corresponding to the device ID2 (in this example, the digital broadcast receiver 2) have the same conditional access card (here, CAS2). ) And for determining whether or not the same program (the same ECM) is to be viewed.

  That is, in step S1121 to step S1124, the device (digital broadcast receiver 2) corresponding to the device ID2 uses the conditional access card 2 to somehow prior to the device corresponding to the device ID1 (digital broadcast receiver 1). When it is determined whether or not the program is being viewed and the digital broadcast receiver 2 has already viewed the program using the conditional access card 2, the digital broadcast receiver 1 uses the same conditional access card. Two and the same ECM cannot be viewed.

  The result of the comparison in step S1125 is discriminated (step S1126), and when both ECMs are different (step S1126: Yes), the conditional access card 2 is associated as data relating to the device ID 1 in the management table (step S1127). The ECM message received in step S801 (FIG. 8) is transmitted to the conditional access card 2 (step S1128).

In this case, the access is to the same conditional access card 2, but the ECM is not the same, so the digital broadcast receiver 1 uses the conditional access card 2 to start viewing a different program from the digital broadcast receiver 2. To do.
In response to the transmission of the ECM message in step S1128, the descrambling key transferred from the conditional access card 2 is received (step S1129), and then the received descrambling key is transmitted to the digital broadcast receiver 1 ( Step S1130). Thereafter, the process returns to step S801 (FIG. 8).

  If it is discriminated in step S1126 that the ECM related to the device ID 1 in the management table is not different from the ECM related to the device ID 2 (step S1126: No), the data of the device ID 1 in the management table is initialized (step S1131). Then, an exclusive message is transmitted to the digital broadcast receiver 1 (step S1132), and then the process returns to step S801 in FIG.

As described above, in the processes of FIGS. 8 to 11, the process is sequentially executed according to the following process flow (1-1) from the beginning of viewing until the release key is acquired by the digital broadcast receiver 1. R:
Step S801 → Step S802 → Step S803 → Step S804 → Step S805 → D of FIG. 8 → D of FIG. 11 → Step S1101 → Step S1102 → Step S1107 → Step S1108 → Step S1109 → Step S1110 → A... ……… Process flow (1-1)

  As described above, the management table is initially in the initial state at the stage of step S802. Also, the column of the connected conditional access card (“CAS card being connected” in FIG. 4), the column of the authentication status for each conditional access card (“CAS authentication status” in FIG. 4), and the current time point The column of ECM data (“current ECM data” in FIG. 4) is blank because data is not yet held, and “exclusive flag” data for exclusively allowing viewing of the broadcast based on viewing authority Are both “0”. FIG. 4A.

When it is determined that the message received in step S801 includes an ECM message (step S802: Yes), “current ECM data” in the table data of the device ID1 (initially no data is held). Then, it is updated to the one corresponding to the received ECM message (step S803)...
Further, in step S1107, the “connected CAS card” (initially no data is stored) in the table data of the device ID 1 is updated to “CAS 1” corresponding to the current state (FIG. 4C).

Next, the processing is executed by the next processing flow (1-2) until the authentication is completed.
Step S801 → Step S802 → Step S811 → Step S821 → Step S822 → Step S823 → B in FIG. 8 → B in FIG. 9 → Step S901 → Step S902 → Step S903 → Step S904 → Step S906 → A ……………… Process flow (1-2)
In step S901, the “CAS authentication status” in the table data of the device ID 1 is updated to “authenticated” so as to correspond to the current state (FIG. 4D).

Following the above, the following processing flow (1-3) and processing flow (1-4) are repeated as long as the viewable state established through processing flow 1 and processing flow 2 is maintained.
Step S801-> Step S802-> Step S803-> Step S804-> Step S805-> Step S806-> Step S808-> Step S809-> Step S809-> A ......... Process Flow (1-3)
and,
Step S801-> Step S802-> Step S811-> Step S821-> Step S822-> Step S823-> A in FIG. 8 Processing flow (1-4)
12 to 15 are flowcharts related to the operation of the conditional access server (when viewing the broadcast with the digital broadcast receiver 2).

  FIG. 16 is a diagram showing a situation in which the management data in the management table held by the conditional access server changes in relation to the operations of the flowcharts of FIGS. In the case assumed in this description, the device ID 1 corresponds to the digital broadcast receiver 1 and the device ID 2 corresponds to the digital broadcast receiver 2 for the device connected to the conditional access server.

In the flowchart of FIG. 12, after starting the operation, the conditional access server receives a message from the digital broadcast receiver 2 via the network (step S1201), and then whether or not the received message includes an ECM message. Is identified (step S1202).
In step S1202, the management table is in an initial state. Also, the column of the connected conditional access card ("CAS card being connected" in FIG. 16), the column of the authentication status for each conditional access card ("CAS authentication status" in FIG. 16), and the current time point The column of ECM data (“Current ECM data” in FIG. 16) is blank because the data is not yet held, and “exclusive flag” data for exclusively limiting viewing of the broadcast based on viewing authority Are both “0”. FIG. 16A.

When it is identified that the message received in step S1201 includes an ECM message (step S1202: Yes), “current ECM data” (data is not initially retained) in the table data of the device ID 2 is received. The one corresponding to the received ECM message is updated (step S1203)...
Next, referring to the data related to the conditional access (CAS in FIG. 16) card of the device ID2 in the management table, any data corresponding to the device ID2 (that is, the digital broadcast receiver 2 in the assumed system) is selected. An authentication status identification process is performed to determine whether or not the conditional access card is authenticated (step S1204). This process is to identify whether any conditional access card is applied in the viewing state (connected).

  As a result of the identification processing in step S1204, it is discriminated whether or not any of the conditional access cards is authenticated (step S1205), and when it is identified as authenticated (step S1205: Yes), With reference to the data of the device ID 2 in the management table, identification processing is performed to identify which conditional access card is currently connected corresponding to the device ID 2 (step S1206).

  It should be noted that at the initial stage of viewing with the device (digital broadcast receiver 2) connected to the conditional access server, no conditional access card is approved. Therefore, at this stage, step S1205 is performed. The discrimination result is “No” (step S1205: No), and the process proceeds to a flowchart shown in FIG. 15, which will be described later, in which the connection is indicated by the external page reference symbol “I”.

As a result of the identification processing in step S1206, when it is discriminated that the currently connected conditional access card is 1 corresponding to the device ID2 (step S1207: Yes), the conditional access card 1 receives it in step S1201. The transmitted ECM message is transmitted (step S1208).
In response to the transmission in step S1208, the descrambling key transferred from the conditional access card 1 is received (step S1209), and then the received descrambling key is transmitted to the digital broadcast receiver 2 (step S1210). . Thereafter, the process returns to step S1201. On the digital broadcast receiver 2 side, the descrambling key supplied from the conditional access card 1 can be used to execute processing for releasing the scramble applied to the received broadcast data, thereby enabling viewing of the broadcast. .

  In the above operation, in general, the ECM is received at the device side (digital broadcast receiver) at an interval of about 2 seconds and sequentially transmitted to the conditional access server. Therefore, after any conditional access card is once authenticated (in use) corresponding to the device side, the processing from step S1201 to step S1210 is intermittent as long as viewing continues. Repeated.

  In the above-described step S1207, it is discriminated whether or not the currently connected (authenticated) conditional access card corresponding to the device ID 2 is 1, and it is discriminated that the conditional access card is not 1. Sometimes (step S1207: No), the ECM message received in step S1201 is transmitted to the conditional access card 2 (step S1217).

Next, the descrambling key is received from the conditional access card 2 (step S1218), the descrambling key is transmitted to the digital broadcast receiver 2 (step S1219), and then the process returns to step S1201.
On the other hand, when it is identified that the message received in step S1201 does not include an ECM message (step S1202: No), it is determined whether or not the received message includes an EMM message (step S1211).

  If it is determined in step S1211 that the received message includes an EMM message (step S1211: Yes), the data related to the conditional access card of device ID2 in the management table is referred to, and device ID2 (in this case, digital In response to the broadcast receiver 2), an authentication status identification process is performed to determine whether any of the conditional access cards has been authenticated (step S1212). This process is to identify whether any conditional access card is applied in the viewing state.

  As a result of the identification process in step S1212, it is discriminated whether or not any of the conditional access cards has been authenticated (step S1213), and when it is identified that it has been authenticated (step S1213: Yes), With reference to the data of the device ID 2 in the management table, identification processing is performed to identify which conditional access card is currently connected (authenticated) corresponding to the device ID 2 (step S1214). If it is discriminated in step S1213 that no conditional access card is authenticated (step S1213: No), the process directly returns to step S1201.

  It is discriminated whether the identification access result in step S1214 is 1 for the currently connected (authenticated) conditional access card corresponding to the device ID 2 (step S1215), and the connected conditional access is performed. When the card is discriminated to be 1 (step S1215: Yes), the EMM message received in step S1201 is transmitted to the conditional access card 1 (step S1216). Thereafter, the process returns to step S1201.

  In the above operation, in general, EMMs are received at the device side (digital broadcast receiver) at appropriate times and transmitted sequentially (sequentially) to the conditional access server. Therefore, after any conditional access card is once authenticated (in use) corresponding to the device side, the processing from step S1211 to step S1216 is intermittent as long as viewing continues. Repeated.

On the other hand, when it is discriminated in step S1215 that the currently connected (authenticated) conditional access card corresponding to the device ID2 is not 1 (step S1215: No), it is received by the conditional access card 2 in step S1201. The transmitted EMM message is transmitted (step S1220), and then the process returns to step S1201.
If it is determined in step S1211 that the received message does not contain an EMM message (step S1211: No), the message received from the digital broadcast receiver 2 in step S1201 is “viewable”. ”Is identified (step S1221).

If it is determined in step S1221 that the received message is a “viewable” message (step S1221: Yes), refer to the situation relating to the data of the device ID 2 in the management table, and the current situation relating to conditional access. Authentication status identification processing is performed (step S1222).
As a result of the identification processing in step S1222, it is discriminated whether or not the device ID2 data in the management table has been authenticated (step S1223), and if it is identified as being authenticated (step S1223: Yes), step The process returns to S1201.

On the other hand, when it is identified in step S1223 that it is not authenticated (step S1223: No), the process proceeds to the flowchart of FIG.
Further, when it is determined in the above-described step S1221 that the received message is not a “viewable” message (step S1221: No), the connection is indicated by the external page reference symbol “H”. Transition to the flowchart shown in FIG.
Further, as described above, in step S1205, when the result of the identification processing in step S1204 is not authenticated (step S1205: No), the connection is indicated by the external page reference symbol “I”. The process proceeds to the flowchart of FIG.

In the above processing flow, the digital broadcast receiver 2 corresponding to the device ID 2 receives the ECM, receives the descrambling key from the conditional access server, and through the determination process that the program can be viewed accordingly. For the first time, a “viewable” message is sent to the conditional access server. That is, the digital broadcast receiver 2 repeatedly transmits a “viewable” message to the conditional access server every time an ECM is received. When viewing is not possible, a message “viewing is not possible” is transmitted.
The conditional access server changes the conditional access authentication status to “authenticated” by the initial “viewable” message. However, since the processing related to the “viewable” message is no longer necessary, the conditional access server of step S1223 Processing is provided.

  Next, processing after the external page reference symbol “G” in FIG. 13 will be described. In step S1202 in the flowchart of FIG. 12, it is identified that the received message does not include an ECM message (step S1202: No), and further, in step S1211, the received message does not include an EMM message. In step S1211, the received message is identified as a “viewable” message (step S1221: Yes), and then the status relating to the data of the device ID 2 in the management table Referring to FIG. 4, the current authentication status identification process for conditional access is performed (step S1222). As a result, it is discriminated whether or not the device ID2 data in the management table is authenticated (step S1223). Not recognized It is when the (Step S1223: No), the process proceeds to the flowchart of FIG. 13 connected with page reference symbol is shown in "G".

Conditional access status data identified as not authenticated in the device ID2 data in the management table is updated to authenticated (step S1301), and then the device ID2 data in the management table is referenced to correspond to the device ID2. Then, identification processing is performed to identify which conditional access card is currently connected (step S1302).
It is discriminated whether the identification access result in step S1302 is 1 for the currently connected (authenticated) conditional access card corresponding to the device ID2 (step S1303), and the connected conditional access is performed. When it is discriminated that the card is 1 (step S1303: Yes), an ID request message is transmitted to the conditional access card 1 (step S1304).

In response to the ID request message transmitted in step S1304, the ID transferred from the conditional access card 1 is received (step S1305), and this ID, that is, CAS_ID representing the conditional access card 1 is received by the digital broadcast receiver. 2 (step S1306). Thereafter, the process returns to step S1201 in FIG.
On the other hand, when it is discriminated in step S1303 that the connected conditional access card is not 1 (step S1303: No), an ID request message is transmitted to the conditional access card 2 (step S1307).
In response to the ID request message transmitted in step S1307, the ID transferred from the conditional access card 2 is received (step S1308), and this ID, that is, the CAS_ID representing the conditional access card 2 is received by the digital broadcast receiver. 2 (step S1309). Thereafter, the process returns to step S1201 in FIG.

  Next, processing after the external page reference symbol “H” in FIG. 14 will be described. In step S1202 in the flowchart of FIG. 12, it is identified that the received message does not include an ECM message (step S1202: No), and further, in step S1211, the received message does not include an EMM message. If it is identified (step S1211: No), and it is further identified in step S1221 that the received message is not a “viewable” message (step S1221: No), an external page reference symbol of “H”. Then, the process proceeds to the flowchart of FIG.

  After it is identified that the received message is not a “viewable” message (step S1221: No), and when the received message is identified as a “not viewable” message (step S1401: Yes), Authentication status of whether or not any conditional access card is authenticated corresponding to the device ID2 (in this case, the digital broadcast receiver 2) with reference to the data related to the conditional access card of the device ID2 in the management table The identification process is performed (step S1402). This process is to identify whether any conditional access card is applied in the viewing state.

As a result of the identification processing in step S1402, it is discriminated whether or not any of the conditional access cards is authenticated (step S1403), and when it is identified as authenticated (step S1403: Yes), The device ID2 data in the management table is initialized (step S1404), and the process returns to step S1201 in FIG.
On the other hand, when any conditional access card is identified as unauthenticated in step S1403 (step S1403: No), data related to the conditional access card of device ID2 in the management table is referred to, and device ID2 (in this case) In step S1405, the digital broadcast receiver 2) identifies which card is the currently connected conditional access card.

It is discriminated whether or not the result of the identification processing in step S1405 is that the currently connected conditional access card is 1 corresponding to the device ID2 (step S1406), and the currently connected conditional access card is 1. If it is discriminated (step S1406: Yes), the process proceeds to the flowchart of FIG. 15 in which the connection is indicated by the external page reference symbol “J”.
If it is discriminated in step S1406 that the currently connected conditional access card is not 1 (step S1406: No), the status of the exclusive flag in the data of the device ID 2 in the management table is identified (step S1407).

It is determined whether or not an exclusion flag is set as an identification result in step S1407 (step S1408). When it is determined that an exclusion flag is not set (step S1408: No), the device ID2 data in the management table is initialized. (Step S1409), an uncontracted message is transmitted to the digital broadcast receiver 2 (Step S1410), and then the process returns to Step S1201 of FIG.
On the other hand, if it is determined in step S1408 that the exclusion flag is set (step S1408: Yes), the device ID2 data in the management table is initialized (step S1411), and an exclusive message is transmitted to the digital broadcast receiver 2. (Step S1412), and then the process returns to Step S1201 of FIG.

  Next, processing after the external page reference symbols “I” and “J” in FIG. 15 will be described. As described above with reference to the flowchart of FIG. 12, any conditional access card is approved at the initial stage of viewing by the device (digital broadcast receiver 2) connected to the conditional access server. Absent. In this initial stage, the discrimination result in the discrimination step S1205 as to whether or not any of the conditional access cards has been authenticated is inevitably “No” (step S1205: No). Therefore, as shown by the external page reference symbol “I”, the flowchart of FIG. 15 is followed.

  With reference to the device ID1 data in the management table, identification processing is performed to identify the currently connected conditional access card corresponding to the device ID1 (step S1501), and the result of the identification processing in step S1501. Then, it is discriminated whether or not the conditional access card currently connected to the device ID 1 is identified as 1 (step S1502).

  If it is discriminated that the currently connected conditional access card corresponding to the device ID1 is 1 (step S1502: Yes), then the conditional access card of the device ID1 in the management table (abbreviated as CAS in the figure) is related to the card. With reference to the data, authentication status identification processing is performed to determine whether any of the conditional access cards has been authenticated in correspondence with the device ID 1 (that is, the digital broadcast receiver 1 in the assumed system) (step) S1503). This process is to identify whether any conditional access card is applied in the viewing state (connected).

  As a result of the identification processing in step S1503, it is discriminated whether or not any of the conditional access cards is authenticated corresponding to the device ID1 (step S1504). In step S1504: Yes, the ECM related to device ID2 in the management table is compared with the ECM related to device ID1 (step S1505).

This comparison shows that the device corresponding to the device ID2 (in this example, the digital broadcast receiver 2) and the device corresponding to the device ID1 (in this example, the digital broadcast receiver 1) have the same conditional access card (in this case, CAS1). And is used to determine whether or not the same program (the same ECM) is to be viewed.
That is, in steps S1501 to S1504, it is determined whether or not the device corresponding to the device ID1 (digital broadcast receiver 1) is watching any program prior to the device corresponding to the device ID2 (digital broadcast receiver 2). When the digital broadcast receiver 1 is already viewing a program using the conditional access card 1, the digital broadcast receiver 2 cannot view with the same conditional access card and the same ECM. .

  The result of the comparison in step S1505 is discriminated (step S1506), and when both ECMs are different (step S1506: Yes), the conditional access card 1 is associated as data related to the device ID 2 in the management table (step S1507). The ECM message received in step S1201 (FIG. 12) is transmitted to the conditional access card 1 (step S1508).

  If the ECM is different in step S1506 (step S1506: Yes), the device corresponding to the device ID 1 (digital broadcast receiver 1) is already connected to the conditional access card 1 and has been authenticated (in use), and the device ID 2 Although the device (digital broadcast receiver 2) corresponding to the above is about to start viewing with the same conditional access card 1, since the ECM is different, the digital broadcast receiver 2 displays a program different from the digital broadcast receiver 1. It means that you are going to watch. In such a case, it is allowed to transmit the ECM to the same conditional access card 1.

In response to the transmission of the ECM message in step S1508, the descrambling key transferred from the conditional access card 1 is received (step S1509), and then the received descrambling key is transmitted to the digital broadcast receiver 2 ( Step S1510). Thereafter, the process returns to step S1201 (FIG. 12).
On the digital broadcast receiver 2 side, the descrambling key supplied from the conditional access card 1 can be used to execute processing for releasing the scramble applied to the received broadcast data, thereby enabling viewing of the broadcast. .

  On the other hand, when it is discriminated in step S1502 that the currently connected conditional access card corresponding to the device ID2 is not 1 (step S1502: No), and in step S1504, any of the conditional access cards corresponding to the device ID2 is selected. When it is discriminated that the conditional access card is also unauthenticated (step S1504: No), the process immediately proceeds to the above-described step S1507.

On the other hand, when it is discriminated in step S1506 that both the ECMs related to the device ID2 in the management table and the ECM related to the device ID1 are the same (No in step S1506), the exclusive flag is used as data related to the device ID2 in the management table. Is set to 1 (step S1515), and the process proceeds to step S1521.
The fact that both ECMs are the same in step S1506 means that the device corresponding to the device ID 2 (in this example, the digital broadcast receiver 2) tried to start viewing using the conditional access card 1. Means that the device (digital broadcast receiver 1) corresponding to the device ID 1 is connected to the same conditional access card 1 and is viewing the same program (the same ECM).

Therefore, it is necessary for the digital broadcast receiver 2 to temporarily hold the exclusive access card 1 for the conditional access card 1, and then viewing with the conditional access card 2 is attempted.
As described with reference to the flowchart of FIG. 14, when it is discriminated that the authenticated conditional access card is 1 (step S <b> 1406: Yes), the connection is indicated by the external page reference symbol “J”. 15 moves to the flowchart (step S1521). In step S1521, authentication status identification processing is performed to determine whether any conditional access card has been authenticated corresponding to device ID1 (in this case, digital broadcast receiver 1).

As a result of the authentication status identification process in step S1521, it is discriminated whether or not the conditional access card currently connected to the device ID1 is identified as 2 (step S1522).
If it is discriminated that the currently connected conditional access card corresponding to the device ID1 is 2 (step S1122: Yes), then the conditional access card of the device ID1 in the management table (abbreviated as CAS in the figure) is related to the card. With reference to the data, authentication status identification processing is performed to determine whether any of the conditional access cards has been authenticated in correspondence with the device ID 1 (that is, the digital broadcast receiver 1 in the assumed system) (step) S1523). This process is to identify whether any conditional access card is applied in the viewing state (connected).

  As a result of the identification processing in step S1523, it is discriminated whether or not any of the conditional access cards is authenticated corresponding to the device ID1 (step S1524). In step S1524: Yes, the ECM related to device ID2 in the management table is compared with the ECM related to device ID1 (step S1525).

The comparison in step S1525 shows that the device corresponding to the device ID2 (digital broadcast receiver 2 in this example) and the device corresponding to the device ID1 (digital broadcast receiver 1 in this example) have the same conditional access card (here, CAS2). ) And for determining whether or not the same program (the same ECM) is to be viewed.
That is, in step S1521 to step S1524, a device corresponding to device ID1 (digital broadcast receiver 1) uses the conditional access card 2 to perform some kind of processing prior to a device corresponding to device ID2 (digital broadcast receiver 2). When it is determined whether or not the program is being viewed and the digital broadcast receiver 1 is already viewing the program using the conditional access card 1, the digital broadcast receiver 2 is the same conditional access card. Two and the same ECM cannot be viewed.

  The result of the comparison in step S1525 is discriminated (step S1526), and when the two ECMs are different (step S1526: Yes), the conditional access card 2 is associated as data related to the device ID2 in the management table (step S1527). The ECM message received in step S1201 (FIG. 12) is transmitted to the conditional access card 2 (step S1528).

In this case, the access is to the same conditional access card 2 but the ECM is not the same, so the digital broadcast receiver 2 uses the conditional access card 2 to start viewing a different program from the digital broadcast receiver 1. To do.
In response to the transmission of the ECM message in step S1528, the descrambling key transferred from the conditional access card 2 is received (step S1529), and then the received descrambling key is transmitted to the digital broadcast receiver 2 ( Step S1530). Then, it returns to step S1201 (FIG. 12).

  If it is discriminated in step S1526 that the ECM related to the device ID2 in the management table is not different from the ECM related to the device ID1 (step S1526: No), the data of the device ID2 in the management table is initialized (step S1531). Then, an exclusive message is transmitted to the digital broadcast receiver 2 (step S1532), and then the process returns to step S1201 in FIG.

As described above, in the processes of FIGS. 12 to 15, the process is sequentially executed according to the following process flow (2-1) from the beginning of viewing until the release key is acquired by the digital broadcast receiver 2. R:
Step S1201 in FIG. 12 → Step S1202 → Step S1203 → Step S1204 → Step S1205 → I in FIG. 12 → I in FIG. 15 → Step S1501 → Step S1502 → Step S1507 → Step S1508 → Step S1509 → Step S1510 → F. ……… Process flow (2-1)

  As described above, initially, at the stage of step S1202, the management table is in an initial state. Also, the column of the connected conditional access card ("CAS card being connected" in FIG. 16), the column of the authentication status for each conditional access card ("CAS authentication status" in FIG. 16), and the current time point The column of ECM data (“Current ECM data” in FIG. 16) is blank because the data is not yet held, and “exclusive flag” data for exclusively allowing viewing of the broadcast based on viewing authority Are both “0”. FIG. 16A.

When the message received in step S1201 is identified as including an ECM message (step S1202: Yes), “current ECM data” (initially no data is stored) in the table data of the device ID 2 is displayed. Then, it is updated to the one corresponding to the received ECM message (step S1203)...
Further, in step S1507, the “connected CAS card” (initially no data is stored) in the table data of the device ID 2 is updated to “CAS 1” corresponding to the current state (FIG. 16C).

Next, until the authentication is completed, the process is executed by the next process flow (2-2).
Step S1201 in FIG. 12 → Step S1202 → Step S1211 → Step S1221 → Step S1222 → Step S1223 → G in FIG. 12 → G in FIG. 13 → Step S1301 → Step S1302 → Step S1303 → Step S1304 → Step S1305 → Step S1306 → F ............ Processing flow (2-2)
In step S1301, the “CAS authentication status” in the table data of the device ID 2 is updated to “authenticated” to correspond to the current state (FIG. 16D).

Following the above, the next process flow (2-3) and process flow (2-4) are maintained in the viewable state established through the process flow (2-1) and the process flow (2-2). Repeat as long as possible.
Step S1201 in FIG. 12 → Step S1202 → Step S1203 → Step S1204 → Step S1205 → Step S1206 → Step S1207 → Step S1208 → Step S1209 → Step S1210 → F ………… Process Flow (2-3)
and,
Step S1201-> Step S1202-> Step S1211-> Step S1221-> Step S1222-> Step S1223-> F of FIG. 12 Processing flow (2-4)

  As described above, the conditional access system 10 and the conditional access server 100 according to the embodiment of the present invention are understood from the description with reference to the flowcharts of FIGS. 8 to 15 and the block diagram of FIG. Based on a broadcast or program viewing contract concluded for the plurality of conditional access cards 110 and 120 connected to the first and second conditional access card interface units 111 and 121 of the conditional access server 100. Common to each digital broadcasting receiver while complying with the viewing contract so that the same conditional access card and the same viewing period are exclusive between the plurality of digital broadcasting receivers 200 and 300. Based on the viewing contract Benefits of viewing authority, i.e., the benefit of being able to view the normal broadcast or program to allow the user to enjoy, server system controller 150 of the conditional access server 100 executes arbitration.

  Further, the digital broadcast receiver interface unit of the conditional access server 100 and the conditional access server interface unit of each of the plurality of digital broadcast receivers are configured by a network interface unit that transmits and receives data through a network. Necessary data can be exchanged through the network without any trouble without being restricted by the arrangement of the respective main bodies of the conditional access server 100 belonging to the conditional access system 10 and the plurality of digital broadcast receivers 200 and 300.

  Further, the server-side system controller 150 simultaneously broadcasts the same broadcast or program for which the viewing contract is concluded with respect to the same conditional access card (110 or 120) between the plurality of digital broadcast receivers 200 and 300. When the operation for viewing is performed, the digital broadcast receiver (200 or 300) preceded by the operation for viewing is allowed to be viewed, and the operation for viewing is subsequently performed. Control is performed so that an exclusive message indicating that the other device is preferentially viewing the broadcast or program is transmitted to the received digital broadcast receiver (step S801 in FIGS. 8 and 10). → Step S802 → Step S811 → Step S821 → Step S1001 → Step S1002 → Step 1003-> step S1005-> step S1006-> step S1007-> step S1008-> step S1011-> step S1012 etc .; step S1201-> step S1202-> step S1211-> step S1221-> step S1401-> step S1402-> step S1403-> step S1405 of FIG. → Step S1406 → Step S1407 → Step S1408 → Step S1411 → Step S1412)

By transmitting the exclusive message, the digital broadcast receiver can display the exclusive message as illustrated in FIG.
In addition, the server-side system controller 150 performs operations in the digital broadcast receivers 200 and 300 for viewing broadcasts or programs for which no viewing contract is concluded for any of the conditional access cards (110 and 120). When it is received, control is executed to transmit a non-contract message indicating that the viewing contract for viewing has not been concluded to the digital broadcast receiver (step S801 → step S802 → step S811 in FIGS. 8 and 10). → Step S821 → Step S1001 → Step S1002 → Step S1003 → Step S1005 → Step S1006 → Step S1007 → Step S1008 → Step S1009 → Step S1010 etc .; Step S1201 → Step S12 in FIG. 12 and FIG. 2 → step S1211 → step S1221 → step S1401 → step S1402 → step S1403 → step S1405 → step S1406 → step S1407 → step S1408 → step S1409 → step S1410, etc.).
By transmitting the non-contract message, the digital broadcast receiver can display the non-contract message as illustrated in FIG.

FIGS. 17 to 19 are conceptual diagrams summarizing each usage scene as described above by illustration.
In the first scene of FIG. 17, viewing authority 1 is recorded on the first conditional access card (indicated as CA card 1), and viewing authority 2 is recorded in the second conditional access card (indicated as CA card 2). In this case, the first digital broadcast receiver 200 uses the viewing authority 1, and the second digital broadcast receiver 300 uses the viewing authority 2. Since the digital broadcast receivers 1 and 2 access different conditional access cards and watch different programs, they can be viewed by both terminals (digital broadcast receivers).

  In the second scene of FIG. 18, a plurality of pay program viewing authorities, that is, viewing authority 1 and viewing authority 2 are recorded on the first conditional access card (indicated as CA card 1). This is a case where the digital broadcast receiver 200 uses the viewing authority 1 and the second digital broadcast receiver 300 uses the viewing authority 2. The first digital broadcast receiver 200 and the second digital broadcast receiver 300 access the same conditional access card (in the illustrated case, the first conditional access card indicated as CA card 1). Since the program to be viewed is different and the ECM data is also different, the program can be viewed on each terminal (digital broadcast receiver).

  In the third scene of FIG. 19, the paying program viewing authority 1 is recorded on the first conditional access card (indicated as CA card 1), and the first digital broadcast receiver 200 precedes this viewing authority. 1 and when the second digital broadcast receiver 300 wants to watch a program that requires viewing authority 1 (when an operation for that purpose is attempted), the same channel is received and the ECM data is the same. Therefore, the second digital broadcast receiver 300 that subsequently attempted to view cannot view a program that requires viewing authority 1. With this exclusive processing, simultaneous viewing with a plurality of digital receivers is not possible for one pay contract, and the viewing contract is observed.

It is a block diagram showing the conditional access system as an embodiment of the invention. It is a block diagram showing the structure of the conditional access server in the conditional access system of FIG. It is a block diagram showing the structure of the digital broadcast receiver as a 1st digital broadcast receiver in the conditional access system of FIG. It is a conceptual diagram showing the management table managed with the conditional access server of FIG. It is a figure showing the example of a display in the case where the display which the other apparatus preferentially is watching the said broadcast or program preferentially in any digital broadcast receiver with which operation for viewing was performed. It is a figure showing the example of a display in the case of displaying that it is going to view the broadcast or program in which the viewing contract is not concluded in any digital broadcast receiver with which operation for viewing was performed. It is a flowchart showing operation | movement of the 1st or 2nd digital broadcasting receiver in the conditional access system of FIG. It is a flowchart regarding the operation of the conditional access server (when viewing the broadcast with the digital broadcast receiver 1). FIG. 9 is a flowchart relating to the operation of the conditional access server (when viewing the broadcast with the digital broadcast receiver 1), and is a diagram of the part following FIG. It is the figure of the part following the flowchart FIG. 8 regarding the operation | movement (when viewing broadcast with the digital broadcast receiver 1) of a conditional access server. It is the figure of the part following the flowchart FIG. 8 regarding the operation | movement (when viewing broadcast with the digital broadcast receiver 1) of a conditional access server. It is a flowchart regarding the operation of the conditional access server (when viewing the broadcast with the digital broadcast receiver 2). FIG. 13 is a flowchart relating to the operation of the conditional access server (when viewing the broadcast with the digital broadcast receiver 2), and is a diagram subsequent to FIG. FIG. 13 is a flowchart relating to the operation of the conditional access server (when viewing the broadcast with the digital broadcast receiver 2), and is a diagram subsequent to FIG. FIG. 13 is a flowchart relating to the operation of the conditional access server (when viewing the broadcast with the digital broadcast receiver 2), and is a diagram subsequent to FIG. It is a conceptual diagram showing the management table managed with the conditional access server of FIG. It is the conceptual diagram which summarized the 1st utilization scene of the conditional access system of this invention by illustration. It is the conceptual diagram which summarized the 2nd utilization scene of the conditional access system of this invention by illustration. It is the conceptual diagram which summarized the 3rd utilization scene of the conditional access system of this invention by illustration.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Conditional access system 100 ... Conditional access server 101 ... 1st card slot 102 ... 2nd card slot 110 ... 1st conditional access card 111 ... 1st conditional access card interface part 120 ... 2nd Conditional access card 121 ... Second conditional access card interface unit 140 ... Network interface unit 150 ... Server side system controller 200 ... First digital broadcast receiver 202 ... Digital tuner 204 ... Scramble release unit 208 ... Network interface unit 209 ... Receiver side system controller 300 ... Second digital broadcast receiver 400 ... Transmission path 410 ... Hub 420 ... Ttowaku

Claims (4)

A conditional access system configured by connecting a conditional access server and a plurality of digital broadcast receivers via a transmission line,
The conditional access server is
A conditional access card interface unit configured to connect a plurality of conditional access cards , and to exchange data with the connected conditional access card;
A digital broadcast receiver interface unit for exchanging data with a plurality of digital broadcast receivers;
It arbitrates data exchange according to the conditional access between a plurality of digital broadcast receiver connected to the conditional access card interface unit connected to a plurality of conditional access card through the digital broadcast receiver interface Te allows the exclusively shared between the multiple connected conditional access cards plurality of digital broadcast receivers that are connected a plurality of viewing authority by the transmission channel by said plurality of digital broadcast receivers When an operation for viewing the same program with the same conditional access card is signed at the same time, the digital broadcast receiver for which the operation was performed in advance Digital broadcast reception that allows viewing and subsequent operation Respect, is configured to include a server side system controller that performs control to transmit a message indicating that another digital broadcast receiver is view exclusively the program with priority, and
The plurality of digital broadcast receivers are:
A tuner for selectively receiving broadcast signals;
A conditional access server interface unit for exchanging data with the conditional access server;
The descrambling process is performed on the broadcast signal received by the tuner unit by receiving the descrambling encryption key data generated by the conditional access card from the conditional access server through the conditional access server interface unit. A descrambling unit to perform,
A conditional access system comprising: a tuner system, a conditional access server interface unit, and a receiver side system controller that controls the scrambling unit.   When the server side system controller performs an operation for viewing a program for which no viewing contract is concluded on any conditional access card in the digital broadcast receiver, the digital broadcast receiver 2. The conditional access system according to claim 1, wherein a message indicating that the viewing contract is not concluded is transmitted. A conditional access server suitable for configuring a conditional access system in which a conditional access server and a plurality of digital broadcast receivers are connected by a transmission path,
A conditional access card interface unit configured to connect a plurality of conditional access cards , and to exchange data with the connected conditional access card;
A digital broadcast receiver interface unit for exchanging data with a plurality of digital broadcast receivers;
It arbitrates data exchange according to the conditional access between a plurality of digital broadcast receiver connected to the conditional access card interface unit connected to a plurality of conditional access card through the digital broadcast receiver interface Te allows the exclusively shared between the multiple connected conditional access cards plurality of digital broadcast receivers that are connected a plurality of viewing authority by the transmission channel by said plurality of digital broadcast receivers When an operation for viewing the same program with the same conditional access card for the same program is performed at the same time, the digital broadcast receiver for which the operation was performed in advance To allow viewing and receive digital broadcasts that are followed by the operation. Against machine, the server system controller that performs control to transmit a message indicating that another digital broadcast receiver is view exclusively the program with priority,
A conditional access server, comprising: The server-side system controller indicates that when the digital broadcast receiver is operated to view a program for which no viewing contract is concluded on any of the conditional access cards, the viewing contract is not concluded. The conditional access server according to claim 3 , wherein the message is transmitted.

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