JP2003134492A - Receiver, reception system and contract information transferring device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the right of a broadcasting carrier or the like from being impaired by allowing only viewing corresponding to the number of contracts, to prevent illegal viewing made by a malicious user and simultaneously to enable a bona fide user having a plurality of receivers to receive desired contracted broadcasting with a desired receiver. SOLUTION: A contract information transferring means for transferring contract information from a limited reception controlling part for performing limited reception control with set contract information is provided. One piece of contract information is transferred from the limited reception controlling part to the contract information transferring means, and also, on the contrary, from the contract information transferring means to the limited reception controlling part so that one piece of contract information does not exist in a plural form at the same time. By performing this operation between a plurality of receivers and the contract information transferring device, contract information can be optionally transferred.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conditional access digital broadcast receiving apparatus and method that descrambles a scrambled signal when permitted based on a contract and uses the signal, and in particular, The present invention relates to a conditional access digital broadcast receiver capable of improving the convenience of users who make a plurality of contracts without damaging the rights of broadcasters and right holders.

[0002]

2. Description of the Related Art BS (Broadcast Satellite) analog broadcasting, CATV (Cable Television), CS (Communication)
In the case of digital broadcasting, BS digital broadcasting, etc., conditional access broadcasting is known in which the broadcast is scrambled and only the contractor can descramble it to view. FIG. 13 shows an example of a BS digital receiver, and the mechanism of conditional access that can be viewed only by the contractor will be described. In FIG. 13, 101 is an antenna, 102 is a tuner section, 103 is a descrambler for descrambling, 104 is a demultiplexer for separating a desired signal from a multiplexed signal, 105 is an MPEG decoder, 10
Reference numeral 6 is a controller for controlling reception, 107 is a conditional access control unit for managing and controlling contract information and keys for conditional access, and 108 is a contract information unit for holding contract information and keys in the conditional access control unit 107. is there. The signal broadcast by the BS is received by the antenna 101, converted into an intermediate frequency, and then sent to the tuner unit 102. The tuner unit 102 demodulates the baseband signal, performs error correction, etc., and outputs it to the descrambler 103. Descrambler 1
03 descrambles with the scrambling key obtained from the conditional access control unit 107.

In the example of BS digital broadcasting, video / audio /
The data content is scrambled, the program additional information such as the program name is not scrambled, and the conditional access control signal for conditional access is encrypted. The content is descrambled. The descrambled signal is separated by the demultiplexer 104 into desired signals, and the video / audio signals are sent to the MPEG decoder 105.
The program additional information and the conditional access control signal are sent to the controller 106.
Through the conditional access control section 107. The video / audio signals are decoded by the MPEG decoder 105 and displayed on a television screen or the like. Controller 10
6 performs the reception control as described above, particularly passes the conditional access control signal obtained from the demultiplexer 104 to the conditional access control unit 107, obtains the scramble release key from the conditional access control unit 107, and sends it to the descrambler 103. By setting, the scrambled broadcast is descrambled and can be viewed. In the case of this BS digital broadcasting, the conditional access control unit 107 is composed of an IC card, and the conditional access control signals are EMM (Entitlement Management Message) and EC.
M (Entitlement Control Message). When the EMM, which is the information about the contract, is acquired and passed to the IC card 107, it is decrypted by the master key Km of the IC card 107, and the work key Kw is set. When the ECM, which is the information for descrambling that is broadcast together with the scrambled program, is acquired and passed to the IC card 107, it is decrypted with the work key Kw set in the IC card 107, and the scramble key Ks is obtained. The controller 106 is an IC
The scramble key Ks is obtained from the card 107 and set in the descrambler 103.

As described above, the contract information is the IC card 10
7 and obtains a key for descrambling the broadcast that is under contract according to the contract information. In BS digital broadcasting, the removable IC card 107 is also known as Japanese Patent Laid-Open No. 2000-341661 as an example in which the IC card 107 is incorporated into a receiving device as an IC chip.

Further, in the conditional access broadcasting as described above, in order for a user to view the content on a plurality of receiving devices, Japanese Patent Application Laid-Open No. HEI-1 is recommended.
1-333197, or JP-A-2000-15152
6, the conditional access control unit 107
A method is known in which a descramble signal ECM is passed from a plurality of devices using a network such as EE1394 to obtain a scramble key Ks to descramble and enable viewing.

[0006]

In the above-mentioned prior art, all contract information of a contract is held in one IC card. Therefore, in order to watch the broadcast on the other receiving device, the IC card must be removed and mounted on the other receiving device. That is, even when the IC card has a plurality of contract information, it can be viewed only by one receiving device at any one time. For example, different contract information a,
In the case of having b, at the same time, one receiving device cannot watch the broadcast based on the contract information a and the other receiving device cannot watch the broadcast based on the contract information b. Further, when the IC card is incorporated into the receiving device as an IC chip, the other receiving device cannot watch the broadcast unless a new contract is made.

Further, in order to eliminate such inconvenience, when the scramble key can be moved using the network as described above, a plurality of receiving devices can simultaneously view a plurality of broadcasts by using a plurality of contract information. It ’s possible to
With one contract, it is possible to view at multiple receivers at the same time. For example, even if the subscribers have the contract information a and b, while one of the receiving devices is watching the broadcast with the contract information a, the other receiving device simultaneously broadcasts with the single contract information a. It becomes possible to watch. Therefore, since the content can be viewed by a plurality of receiving devices with one contract, there is a problem that it is not possible to protect the rights of the broadcaster, the right holder, etc. from an illegal viewing action by a malicious user.

[0008] Therefore, the present invention has an advantage of preventing broadcasts from being simultaneously viewed by a plurality of receiving devices under one contract as in the prior art using an IC card or an IC chip, and the network can be used. When the user has a plurality of contract information as in the prior art used, a well-meaning user who owns a plurality of receiving devices by enabling a plurality of receiving devices to simultaneously view a broadcast based on the plurality of contract information. It is an object of the present invention to provide a receiving device with improved convenience.

[0009]

[Means for Solving the Problems] In order to solve the above-mentioned problems, means for moving contract information (hereinafter referred to as contract moving means) is provided, and contract information EMM is provided between the conditional access control unit and the contract moving means. Alternatively, the work key Kw is delivered,
The contract information can be moved between a plurality of receiving devices.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention is shown in FIG.
In the embodiment of FIG. 1, 109 is a mobile interface (hereinafter referred to as mobile I / F) for moving contract information 1
The conditional access control unit including 10 and 111 are contract transfer means for connecting to the conditional access control unit 109 to transfer the contract information. Others are the same as those in the conventional example, and therefore the same reference numerals are given and described. Omit it. Hereinafter, the operation of the embodiment of FIG.
The conditional access control unit 109 causes the contract information unit 108 to store three pieces of contract information a, b, and c (work keys Kwa, Kwb, and Kwc).
Will be described and the contract information moving means 111 will hold the contract information d (work key Kwd) as an example.
Among these pieces of contract information, some desired contract information is moved between the conditional access control unit 109 and the contract information moving means 111 via the moving I / F 110. For example,
A case where the contract information b and c (work keys Kwb and Kwc) are moved will be described. First, the conditional access control unit 109 and the contract transfer means 111 are connected, and mutual authentication processing is performed to confirm that they are correct devices. After the authentication is correctly performed, one contract information is divided into a plurality of pieces of information, and the contract information b and c (work keys Kwb and Kwc) to be moved are divided and moved a plurality of times. By this movement, the contract information held by the contract information unit 108 of the conditional access control unit 109 becomes the contract information a (work key Kwa), and the contract transfer means 111 contract information b, c, d (work key Kwb, K).
wc, Kwd). In addition, for example, conversely, the contract transfer means 111 to the conditional access control unit 10
In the case of returning the contract information to 9, the conditional access control unit 109 and the contract transfer means 111 mutually perform authentication processing to confirm that the device is the correct device, and then divide one contract information into a plurality of pieces of information. The contract information c and d (work keys Kwc and Kwd) are moved in a plurality of times. By this movement, the contract information unit 108 of the conditional access control unit 109
Is contract information as contract information a, c, d (work key Kw
a, Kwc, Kwd), and the contract transfer means 1
The contract information 11 is contract information b (work key Kwb). As described above, arbitrary contract information can be moved between the conditional access control unit 109 and the contract information moving unit 111.

Here, one contract information is divided into a plurality of pieces of information and moved in a plurality of times so that even if an unexpected situation such as a power failure occurs during the movement, the contract information is destroyed or lost. This is to prevent the above-mentioned problem, and to restart the movement before the interruption so that the contract information can be completed, and to prevent one complete form of contract information from existing at a plurality of locations at the same time. FIG. 2 shows an example in which the contract information is moved n times. The first data is transferred from the conditional access control unit 109 to the contract transfer means 11
Copy to 1. After confirming that the copy is completed, the first data is erased from the conditional access control unit 109. Similarly, the second data is copied to the contract transfer means 111, and after confirming the completion, the conditional access control unit 109
Delete the second data from. By repeating the above operation up to the nth time, the contract information is moved from the conditional access control unit 109 to the contract moving means 111. When the m-th data of this transfer process is interrupted during the transfer due to a power failure or the like, the conditional access control unit 109 retains the m-nth data, and the contract transfer means 111 includes the 1st-m-1th data. Incomplete m-th data remains with the information that the m-th data copy is not completed. When the transfer is resumed, the incomplete m of the contract transfer means 111 is determined based on the information that the mth data copy is not completed.
The m-th data is discarded, and the m-th data is moved according to the moving procedure. By doing so, it is possible to prevent the contract information from being destroyed or lost due to an unforeseen situation that occurs during the process of moving the contract information, and to erase the copied data, so that the contract with the conditional access control unit 109 is contracted. Means of transportation 1
It is possible to prevent complete contract information from remaining in both 11 at the same time.

Next, regarding the operation of moving the contract information between a plurality of receiving devices, the contract information a,
b, c (work keys Kwa, Kwb, Kwc), contract information d, e (work keys Kwd, Kwe) in the receiving device B302
And the contract information b (work key Kwb) is received by the receiving device A3.
As an example, the case of moving from 01 to the receiving device B302 is shown in FIG.
Will be described. First, the contract information moving unit 111 is connected to the conditional access control unit 109A of the receiving device A301, and the contract information b (work key Kwb) is transferred between the conditional access control unit 109A and the contract moving unit 111 by the procedure described above. It moves from the conditional access control unit 109A to the contract transfer unit 111. As a result, the contract information a, c is stored in the receiving device A301.
(Work keys Kwa, Kwc) are held, and the contract information moving unit 111 is in a state of having the contract information b (work key Kwb). Next, the contract information moving unit 111 is connected to the conditional access control unit 109B of the receiving device B302, and the contract information b (work information is transferred between the contract information moving unit 111 and the conditional access control unit 109B according to the procedure described above. Key Kwb)
From the contract information moving means 111 to the conditional access control unit 109B
Move to. As a result, the receiving device B302 holds the contract information b, d, e (work keys Kwb, Kwd, Kwe), and the contract transfer means 111 empties the contract information. By the above operation, the contract information b (work key Kwb) is moved from the receiving device A301 to the receiving device B302 via the contract information moving means 111. As the contract information moving means 111 used in this embodiment, for example, a secure memory card or the like is assumed.

FIG. 4 shows an example of a user operation for moving the contract information. First, the contract information moving means 111 is connected to the receiving device. Next, for example, a menu is displayed by an OSD (On Screen Display) display that is displayed overlaid on the video output of the receiving device, and an OSD screen display instruction for instructing the contract movement is performed using a remote control key or the like. In one display example 401 of this OSD screen, the contract information held by the receiving device is displayed on the left side, and the contract information held by the contract information moving means 111 is displayed on the right side. The user uses the remote controller or the like to select the contract information to be moved, as in 402. After selecting
When the movement is instructed, the contract information is moved to the other side, and the contract information of the channel b is moved from the receiver to the contract information moving means as in 403. Here, the display method of the OSD screen and the user operation method shown in FIG. 4 are examples, and other display methods and operation methods such as displaying the progress of movement and selecting contract information by number may be used. Needless to say.

Similarly to the other embodiments, the receiving device can be built in the display (display device). Even if it is manufactured integrally with the display, the I / F and the like as in the respective embodiments may be used in the display.

As described above, according to the present embodiment, it is possible to selectively move arbitrary contract information from among a plurality of contract information between the receiving device and the contract information moving means. By using this, it is possible to move arbitrary contract information between a plurality of receiving devices. Further, since the work key is moved instead of the scramble key, one contract information is always used by only one receiving device, which does not impair the rights of broadcasters and the like. Allows the contract information to be moved arbitrarily so that the plurality of receiving devices can view the information at the same time.

FIG. 5 shows another embodiment of the present invention. Figure 5
1 is different from the embodiment of FIG. 1 in that the conditional access control unit 509 changes the contract information of the contract information unit 108 to the mobile I / F.
The other points are the same as those of the embodiment of FIG. 1 in that they are exchanged with the contract information moving means 111 via the controller 506 via 510, and therefore the same numbers are assigned and the description thereof is omitted. The operation of the embodiment of FIG. 5 different from that of FIG. 1 will be described below. Contract information moving means 11
1 is connected to the controller 506. First, the conditional access control unit 509 and the contract information moving unit 111 mutually authenticate via the controller 506 whether they are correct devices. The conditional access control unit 509 performs generation and confirmation of the authentication data.
And the contract information moving means 111, and the controller 506 controls the transmission and reception of the data. If you can confirm that they are correct devices,
Moves contract information. The moving process is the same as that of the embodiment of FIG. 1 except that the controller 506 controls the moving process.

As described above, in this embodiment as well, FIG.
Similar to the embodiment described above, since any contract information can be moved between the receiving device and the contract information moving means, it is possible to move any contract information between a plurality of receiving devices by using the contract information moving means. Becomes As a result, one contract information is always used by only one receiving device, and does not impair the rights of broadcasters and the like, and the viewer can move the contract information arbitrarily and watch the receiving device. You can watch it at. Further, according to the present embodiment, the conditional access control unit does not need an interface for directly connecting to the contract information moving means, and only the controller for receiving control is connected. Therefore, the degree of freedom in designing the receiving device is high. There is an advantage.

FIG. 6 shows another embodiment of the present invention. Figure 6
1 is different from the embodiment of FIG. 1 in that the contract information moving means 611 has a contract comparison unit 612, and other parts are the same as those of the embodiment of FIG. Is omitted. The operation of the embodiment of FIG. 6 will be described below with respect to the differences from the embodiment of FIG. For example, it is assumed that the user has two contracts so that the channel C can be simultaneously viewed by the two receiving devices. Conditional access control unit 1
Contract information c (work key K in the contract information unit 108 of 09)
When wc) is moved to the contract information moving unit 611 connected via the mobile I / F 110, first, the conditional access control unit 109 and the contract information moving unit 611 mutually authenticate whether or not they are correct devices. When mutually authenticated as correct devices, the contract comparison unit 612 in the contract information transfer means 611.
Compares whether or not the contract information c to be moved exists in the contract information moving means 611. If the user has two contracts so that the channel C can be viewed simultaneously by the two receiving devices, and the contract information c of the other party has already entered the contract information moving means 611, the contract information is not moved. . The same contract information c is the contract information moving means 611.
If not entered, the conditional access control unit 109 moves the contract information moving means 6 in the same manner as the moving procedure of the embodiment of FIG.
Move contract information to 11. On the contrary, when moving the contract information c from the contract information moving means 611 to the conditional access control unit 109, the contract comparison unit 612 compares the contract information in the contract information unit 108 with the contract information to be moved, and the same. If the contract information exists, it is not moved. By doing this, if the user has multiple same contracts, the contract information will be overwritten,
Prevent the contract from disappearing.

As described above, in this embodiment as well, FIG.
Similar to the embodiment described above, since any contract information can be moved between the receiving device and the contract moving means, it is possible to move any contract information between a plurality of receiving devices by using the contract information moving means. . As a result, one contract information is always used by only one receiving device, and does not impair the rights of broadcasters and the like, and the viewer can freely move the contract information to view the receiving device. You can watch it at.
Further, according to the present embodiment, when a plurality of receiving devices have the same contract for simultaneous viewing, the presence of the same contract is detected before the transfer of the contract information, and if the same contract exists, the contract is contracted. Since it is possible not to move the information, it is possible to prevent the contract from being lost due to accidental overwriting due to the movement of the contract information.

FIG. 7 shows another embodiment of the present invention. Figure 7
6 is different from the embodiment of FIG. 6 in that the conditional access control unit 509 changes the contract information of the contract information unit 108 to the mobile I / F.
The other points are the same as those of the embodiment of FIG. 6 in that they are exchanged with the contract transfer means 611 via the controller 506 via 510, and therefore the same numbers are assigned and the description thereof is omitted. The operation of the embodiment of FIG. 7 different from the embodiment of FIG. 6 will be described below. The contract transfer means 611 is connected to the controller 506. First, the conditional access control unit 509 and the contract transfer means 611 mutually authenticate via the controller 506. To generate and check the authentication data,
The conditional access control unit 509 and the contract transfer means 611 perform the respective processes, and the controller 506 controls the transmission and reception of the data. When it is confirmed that the devices are correct, the contract comparing unit 612 in the contract information moving unit 611 compares whether or not the contract information c to be moved exists in the contract information moving unit 611. If the user has made two contracts so that the channel C can be simultaneously viewed by the two receiving devices, and the contract information c of the other party has already entered the contract information moving means 611, the contract information is not moved. If the same contract information c is not stored in the contract information moving means 611, the contract information is moved from the conditional access control unit 509 to the contract information moving means 611 in the same manner as the moving procedure of the embodiment of FIG. The point that the controller 506 controls this moving process is the same as the embodiment of FIG. 5, and is the same as the embodiment of FIG. 6 except that the controller 506 controls the movement of the contract information.

As described above, FIG. 6 is also used in this embodiment.
Similar to the embodiment described above, since the contract information can be arbitrarily moved between the receiving device and the contract moving means, it is possible to arbitrarily move the contract information between the plurality of receiving devices by using the contract information moving means. . As a result, one contract information is always used by only one receiving device, and does not impair the rights of broadcasters and the like, and the viewer can move the contract information arbitrarily and watch the receiving device. You can watch it at.
Further, according to the present embodiment, the conditional access control unit does not need an interface for directly connecting to the contract information moving means, and only the controller for receiving control is connected. Therefore, the degree of freedom in designing the receiving device is high. There is an advantage. Further, according to the present embodiment, when a plurality of receiving devices have the same contract for simultaneous viewing, the presence of the same contract is detected before the transfer of the contract information, and if the same contract exists, the contract is contracted. Since it is possible not to move the information, it is possible to prevent the contract from being lost due to accidental overwriting due to the movement of the contract information.

FIG. 8 shows another embodiment of the present invention. Figure 8
The embodiment is different from the embodiment of FIG. 7 in that the contract information moving means 811 has a contract management unit 812, and other parts are the same as the embodiment of FIG. Is omitted. The operation of the embodiment of FIG. 8 will be described below with respect to differences from the embodiment of FIG. Conditional access control unit 5
When the contract information is moved from 09 to the contract information moving unit 811, the contract management unit 812 determines whether or not the contract information to be moved already exists in the contract information moving unit 811, and if it does not exist, another execution is performed. The contract information is moved in the same manner as in the example, and if there is the same contract information, the contract information is managed by an identifier or the like so that each contract information is managed separately as one contract information and moved. The contract management unit 812 individually manages the same contract information as one contract information,
Therefore, when the contract information exists as shown in FIG. 8, the conditional access control unit 509 moves the contract information moving unit 81.
When the contract information c (work key Kwc) is moved to 1, the contract information moving means 811 has two pieces of contract information c. An identifier or the like is attached to the two contract information items c, which are individually managed as correct contract information items and are not overwritten and lost. On the contrary, the contract information moving means 8
When moving the contract information from 11 to the conditional access control unit 509, the contract management unit 812 determines whether or not the contract information to be moved already exists in the conditional access control unit 509, and if it does not exist, another operation is performed. The contract information is moved in the same manner as in the example, and if it exists, it is not moved as in the embodiment of FIG. In this movement, when a plurality of the same contract information (two contract information c in the above example) exists, one of the contract information is moved by the moving procedure.

As described above, also in this embodiment, FIG.
Similar to the embodiment described above, since the contract information can be arbitrarily moved between the receiving device and the contract moving means, it is possible to arbitrarily move the contract information between the plurality of receiving devices by using the contract information moving means. . As a result, one contract information is always used by only one receiving device, and does not impair the rights of broadcasters and the like, and the viewer can move the contract information arbitrarily and watch the receiving device. You can watch it at.
Furthermore, according to this embodiment, when a plurality of receiving devices have the same contract for simultaneous viewing, they can be individually identified and managed, so that the same contract information can be overwritten. The contract information can be moved without causing an erroneous process such as deleting the contract information.

Although not shown, the contract information moving means 811 and the conditional access control section 509 are provided as in the embodiment of FIG.
Needless to say, the method of connecting is also possible.

FIG. 9 shows another embodiment of the present invention. Figure 9
The embodiment is different from the other embodiments in that a network interface (hereinafter, referred to as network I / F) 913 that connects the receiving device to the network 914 is provided,
The controller 906 that controls the receiving device transmits and receives contract information and the like between the receiving devices connected to the network 914 by the network I / F 913, and the other parts are the same as those in the other embodiments, and thus the same numbers are assigned. And the description is omitted. The operation of the embodiment of FIG. 9 different from other embodiments will be described below. When the contract information is moved to another receiving device (not shown) connected to the network 914, the controller 906 performs mutual authentication processing with another receiving device that the devices are correct. The information for authentication and the authentication process are processed by the conditional access control unit 509 of each receiving device, and the controller 906 processes transmission and reception of data and commands via the network I / F 913 according to the procedure. After it is verified that the receiving devices are mutually correct devices, the contract information is moved. The movement of the contract information is performed according to the transmission / reception procedure in the network, but the procedure of moving the contract information in plural times is the same as in the other embodiments, and one complete contract information does not exist at the same time. . Also, the controller 9
Before initiating the transfer of the contract information, 06 inquires of the controller of the transfer destination whether or not the contract information to be moved already exists at the transfer destination, and does not move the contract information if it already exists.

The user operation for moving the contract information in this embodiment is similar to the OSD display example at the time of the operation shown in FIG. 4. For example, in the contract information moving means shown on the right side of the OSD display example. The contract information list becomes the contract information list of the receiving devices connected by the network. The contract information selection and movement instruction are the same as in the example of FIG. Also, FIG.
In the same way as described in the explanation, the method of displaying the list of the destinations of the receiving devices connected to the network, selecting it and then moving to the contract information move operation, and the contract with the moving destinations of the receiving devices connected to the network It goes without saying that various user operation methods such as a method of collectively displaying information can be realized.

As described above, also in this embodiment, like the other embodiments, it is possible to move any contract information between a plurality of receiving devices. As a result, one contract information is always used by only one receiving device, which does not impair the rights of broadcasters and the like, and the viewer can move the contract information arbitrarily to view the receiving device. It becomes possible to watch. Further, according to the present embodiment, when a plurality of receiving devices have the same contract for simultaneous viewing, and if the same contract exists, the moving is not performed, so that the same contract information is overwritten. For example, the contract information can be moved without causing an erroneous process such as deleting the contract information.

Although not shown, the network 91
Needless to say, the contract information can be moved by directly connecting the network I / Fs 913 of the receiving devices without using No. 4.

FIG. 10 shows another embodiment of the present invention. The embodiment of FIG. 10 differs from the embodiment of FIG. 9 in that a contract information server 1015 is connected to a network 914, and this contract information server 1015 holds and distributes contract information. Since this is the same as the embodiment of FIG. 9, the same reference numerals are given and the description thereof is omitted. The operation of the embodiment of FIG. 10 will be described below with respect to differences from the embodiment of FIG. In the embodiment of FIG. 9, contract information is transmitted and received to and from another receiving device via the network 914.
In the 0th embodiment, contract information is also transmitted / received to / from the contract information server 1015. The contract information transmission / reception procedure is the same as the transmission / reception method in the embodiment of FIG. 9 except that the contract information server 1015 performs authentication processing and contract information transmission / reception control in accordance with the network transmission / reception procedure.
Also in the present embodiment, it goes without saying that the contract information can be sent and received between the receiving devices as in the embodiment of FIG.

As described above, also in this embodiment, like the other embodiments, it is possible to move any contract information between a plurality of receiving devices. As a result, one contract information is always used by only one receiving device, and does not impair the rights of broadcasters and the like, and the viewer can move the contract information arbitrarily and watch the receiving device. You can watch it at. Further, according to the present embodiment, when a plurality of receiving devices have the same contract for simultaneous viewing, and if the same contract exists, the moving is not performed, so that the same contract information is overwritten. For example, the contract information can be moved without causing an erroneous process such as deleting the contract information. Further, since the contract information server can manage the contract information, it is possible to easily show the user which contract device the contract information is in, deliver the contract information to the receiving device when necessary, and collect it from the receiving device when it is no longer needed. By doing so, it is possible to automate the sending and receiving of contract information, and further improve usability.

FIG. 11 shows another embodiment of the present invention. The embodiment of FIG. 11 differs from the embodiment of FIG. 1 in that there is a conditional access control unit 509 and a contract information dealer 1114 that connects the conditional access control unit 509 to exchange contract information. This is the same as the first embodiment, the same reference numerals are given, and the description is omitted. Hereinafter, the embodiment of FIG.
The operation will be described with respect to points different from the embodiment of FIG. The conditional access control unit 509 is a detachable receiving device, and the operation of receiving conditional access broadcasts is the same as in the embodiment of FIG. To move the contract information, the removable conditional access control unit 5
09 from the receiving device, contract information dealer 1114
Connect to. The contract information dealer 1114 performs mutual authentication processing with the connected conditional access control unit 409 that the device is correct. If it can be authenticated that the device is correct, the contract information dealer 1114 and the conditional access control unit 50.
The contract information is exchanged with the customer. The procedure for transmitting and receiving the contract information is the same as that of the other embodiments. The same contract information is added with an identifier or the like to correctly manage the existence of a plurality of contracts, and one contract in the conditional access control unit 509. Are controlled so as not to exist in two or more places at the same time.

As described above, also in the present embodiment, like the other embodiments, it is possible to move any contract information between the device for centrally managing the contract information and the plurality of receiving devices. As a result, one contract information is always used by only one receiving device, which does not impair the rights of broadcasters and the like, and the viewer can move the contract information arbitrarily to view the receiving device. It becomes possible to watch. Furthermore, according to the present embodiment, in the conventional reception mode in which the conditional access control is performed by the IC card, the contract information can be moved using the contract information dealer. Further, according to the present embodiment,
If you have multiple contracts for viewing on multiple receivers at the same time, and if you have the same contracts, you will not be moved. The contract information can be moved without causing erroneous processing. Further, since the contract information dealer can manage the contract information, it can be easily shown to the user which conditional access control unit the contract information is in,
It is possible to improve usability.

FIG. 12 shows another embodiment of the present invention. The embodiment of FIG. 12 is different from the embodiment of FIG. 8 in that there is a contract information dealer 1214 that connects the contract information moving means 811 and exchanges contract information, and otherwise the same as the embodiment of FIG. Therefore, the same numbers are assigned and the description is omitted.
The movement of the contract information between the conditional access control unit 509 and the contract information moving means 811 is the same as in the embodiment of FIG. The contract information transfer means 811 and the contract information dealer 1214 are connected to mutually authenticate that they are correct devices to transfer the contract information. The movement of the contract information is similar to that of the embodiment shown in FIG.

As described above, also in the present embodiment, like the other embodiments, it is possible to move any contract information between the device for centrally managing the contract information and the plurality of receiving devices. As a result, one contract information is always used by only one receiving device, which does not impair the rights of broadcasters and the like, and the viewer can move the contract information arbitrarily to view the receiving device. It becomes possible to watch. Further, according to the present embodiment, when a plurality of receiving devices have the same contract for simultaneous viewing, and if the same contract exists, the moving is not performed, so that the same contract information is overwritten. For example, the contract information can be moved without causing an erroneous process such as deleting the contract information. In addition to the conventional reception mode in which the conditional access control is performed by the IC card, the contract information can be moved using the contract information dealer even when the conditional access control unit is incorporated in the receiving device. Since the dealer can manage the contract information, it is possible to easily present to the user which conditional access control unit the contract information is in, and it is possible to further improve the usability.

[0035]

As described above, according to the present invention, unauthorized viewing by a malicious user can be prevented without impairing the rights of broadcasters and the like, and at the same time, it is convenient for users having a plurality of receiving devices. It is possible to improve the sex.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention.

FIG. 2 is a diagram showing a procedure for moving contract information by dividing it into n times.

FIG. 3 is a diagram showing a method of moving contract information between receiving devices.

FIG. 4 is a diagram showing an example of an OSD display for performing a contract information transfer operation.

FIG. 5 is a diagram showing another embodiment of the present invention.

FIG. 6 is a diagram showing another embodiment of the present invention.

FIG. 7 is a diagram showing another embodiment of the present invention.

FIG. 8 is a diagram showing another embodiment of the present invention.

FIG. 9 is a diagram showing another embodiment of the present invention.

FIG. 10 is a diagram showing another embodiment of the present invention.

FIG. 11 is a diagram showing another embodiment of the present invention.

FIG. 12 is a diagram showing another embodiment of the present invention.

FIG. 13 is a diagram showing a conventional example.

[Explanation of symbols]

101 ... Antenna, 102 ... Tuner, 103
... descrambler, 104 ... demultiplexer, 105 ... MPEG decoder, 106 ... controller, 107 ... conditional access control section, 108 ...
Contract information part, 109 ... Contract information part, 110 ... Moving I / F, 111 ... Contract information moving means, 201 ...
Contract information, 202 ... Contract information, 301 ... Receiving device A, 302 ... Receiving device B, 401 ... Contract information list display in contract information moving operation, 402 ... Contract information moving operation Contract information selection display, 403 ...
-Display of contract information list after movement in contract information movement operation, 506 ... Controller, 509 ... Conditional access control unit, 510 ... Moving I / F, 611 ... Contract information moving means, 612 ...・ Contract comparison unit, 811 ... Contract information moving means, 812 ... Contract management unit, 906 ...
・ Controller, 913 ... Network I / F, 9
14 ... Network, 1015 ... Contract information server, 1114 ... Contract information dealer, 1214 ...
..Contract information dealers

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Kenji Katsumata             292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa             Ceremony Hitachi Digital Media Development Book             Department (72) Inventor Masaru Nagiki             292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa             Ceremony Hitachi Digital Media Development Book             Department (72) Inventor Yuji Yamamoto             292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa             Ceremony Hitachi Digital Media Development Book             Department (72) Inventor Satoshi Iimuro             292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa             Ceremony Hitachi Digital Media Development Book             Department F-term (reference) 5C025 BA30 CA02 CA19 DA01 DA04                 5C064 BA01 BB02 BC27 DA02                 5J104 AA07 AA16 EA13 EA16 NA03                       PA05 PA07

Claims (12)

[Claims] 1. A conditional access control means for receiving a scrambled broadcast, capable of holding a plurality of contract information for viewing a scrambled broadcast, and the contract information. And a mobile interface connected to the contract information moving means for moving the contract information, and moving arbitrary contract information selected from a plurality of contract information held in the conditional access control means to the previous term contract information moving means through the mobile interface. A receiver characterized by being. 2. The receiving apparatus according to claim 1, wherein the contract information is information for obtaining a scramble key for descrambling. 3. A control means for controlling authentication of the conditional access control means and the contract information moving means and control of movement of the contract information, wherein the control means comprises the conditional access control means and the contract information moving means. The receiving apparatus according to claim 1 or 2, wherein the contract information is controlled to move after authentication is completed. 4. The reception according to claim 1, wherein the mobile interface is an interface connectable to a network, and the contract information moving means is a network. apparatus. 5. The contract information is divided into n pieces (n ≧ 2) of data, each divided piece of data is copied from a movement source to a movement destination, and after the copying is completed, the movement source data is deleted. The receiving device according to any one of claims 1 to 4, wherein the contract information is moved by repeating an operation. 6. A receiving system comprising a contract information server which holds contract information and is capable of delivering contract information in response to a request, a receiving device according to claim 4, and the contract information moving means. The receiving device and the contract information server are connected to the contract information moving means, and the contract information can be moved after authentication is completed between the contract information server and the receiving device. And the receiving system. 7. A contract information dealer device for moving and holding contract information by connecting the receiving device according to any one of claims 1 to 3, the contract information moving means, and the contract information moving means. And the contract information dealer device is capable of moving the contract information after performing authentication with the connected contract information moving means. Receiving system. 8. The contract information is divided into n pieces (n ≧ 2) of data, each divided piece of data is copied from a movement source to a movement destination, and after the copying is completed, the movement source data is deleted. The receiving system according to claim 6 or 7, wherein the contract information is moved by repeating an operation. 9. A conditional access control means capable of receiving a scrambled broadcast and holding a plurality of contract information for viewing the scrambled broadcast, and a mobile interface. A contract information moving device connected to a receiving device, wherein the contract information moving device is connected to the conditional access control means through the mobile interface, and receives arbitrary contract information selected from the plurality of contract information from the receiving device. Contract information transfer device. 10. The contract information moving device comprises a contract comparing unit for comparing contract information, compares whether or not the contract information to be moved already exists at the moving destination, and moves if it exists. The contract information moving device according to claim 9, wherein the contract information moving device is not performed. 11. The contract information moving device comprises contract management means for comparing contract information and adding an identifier to each contract information when contracts having the same content exist, and managing movement as individual contract information. The contract information moving device according to claim 9, wherein the contract information moving device is provided. 12. A receiving system comprising: the receiving device according to claim 1; and a display device for displaying a broadcast descrambled by the receiving device.