JP2000209168A - Information transmitter, its method, information receiver, its method, information managing system, its method and served medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To delete or update optional individual information. SOLUTION: Individual information consists of an individual information header that denotes individual information, identification of pay broadcast station that denotes a broadcast station being a sender of the individual information, an individual information management number consisting of a serial number provided to identify a plurality of individual information sets transmitted to a same reception terminal, an individual information management branch number that is a number to identify a plurality of information sets provided with the same individual number, other individual information (contract information, its validity, and a work key used to decode encrypted scramble key required to release the scrambled contract program or the like), and an error check code to detect a code error during transmission.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information transmitting apparatus and method, an information receiving apparatus and method, an information management system and method, and a providing medium. In particular, in a pay television broadcasting service, from a broadcasting apparatus to each receiving terminal. An information transmitting device that allows the transmitting side to manage the individual information transmitted from the broadcasting device, received by the receiving terminal, and stored by assigning a management number to the transmitted individual information, and The present invention relates to a method, an information receiving apparatus and method, an information management system and method, and a providing medium.

[0002]

2. Description of the Related Art At present, digital satellite broadcasting such as SkyPerfect TV (trademark) is widely used. Also,
In the future, implementation of digital BS broadcasting and digital terrestrial broadcasting using a broadcasting satellite (BS) is planned.

[0003] Digital broadcasting such as digital satellite broadcasting is more resistant to noise and fading than existing analog broadcasting, and can transmit high-quality signals. Also,
The frequency use efficiency has been improved and the number of channels has been increased. In the digital satellite broadcasting which has already started the service, a large number of specialty channels for sports, music, movies, news, etc. are prepared, and each specialty channel broadcasts its own program.

[0004] Such digital satellite broadcasting employs a scramble broadcasting system. That is, the transmitting (broadcasting station) side scrambles and transmits the video signal and the audio signal, and only the receiving terminal owned by the user who has previously made the viewing contract can release the scrambling.

[0005] Contract forms of the scramble broadcasting system are roughly divided into the following two forms. In other words, a flat contract in which programs to be viewed and the like are determined in advance,
This is a pay-per-view (hereinafter referred to as PPV) contract in which a fee is paid according to the program viewed. Flat contracts are further classified into pay-per-channel (hereinafter referred to as PPC), which is a contract in units of channels, and pay-per-series (hereinafter, referred to as PPS), which is contracts in series. You.

[0006] Further, the PPV contract further includes a call ahead PPV for notifying the sender in advance that the program is to be viewed.
And impulse PPV (hereinafter referred to as IPPV), which does not require the transmitting side to view the program in advance.

[0007] In such a scramble broadcasting system, first, the transmitting side transmits individual information to a receiving terminal owned by a user who has previously made a viewing contract.
This individual information is encrypted with an individual key unique to the user (receiving terminal). In addition, the user's receiving terminal stores in advance an individual key unique to the user, and decrypts the encryption of the individual information using the individual key, and stores the obtained individual information. The individual information includes information such as a work key of the contracted channel, a contracted channel ID, a contracted program ID, and a contract type (viewing form). The transmission of the individual information from the broadcast station is performed at any time when the individual information needs to be updated, such as when a new contract is made or when the contract is changed.

[0008] Programs (video signals and audio signals) broadcast from the transmitting side are scrambled using a scramble key. Common information for identifying the program (video signal and audio signal) is added to the program. The common information includes a program ID, a service ID, a scramble key encrypted with a work key, and the like.
In the receiving terminal, the encrypted scramble key included in the common information is decrypted and extracted using the work key of the contract channel included in the individual information.

The common information is collated with contract information (contract channel ID, contract program ID, etc.) as individual information already stored in the receiving terminal. As a result of the collation, when the program to which the common information is added is recognized as the contracted program, the scramble of the program (video signal and audio signal) is released using the scramble key.

[0010] For example, if the user has a PPC contract, the channel ID of the common information added to the video signal and the audio signal of the program being broadcast matches the contract channel ID of the individual information. After the recognition, the scramble of the video signal and the audio signal is released using the scramble key.

[0011] In this manner, the receiving terminal can descramble and view only the program of the subscribed channel.

The details of the above-described scramble broadcasting system are described in, for example, JP-A-9-51520.

[0013]

In the above-described scramble broadcasting system (for example, SkyPerfect TV), the individual information that the transmitting side (broadcasting station) transmits to each receiving terminal includes the individual information. Since information such as a number to specify is not given, it is possible to designate one of a plurality of individual information transmitted in the past and stored in the receiving terminal from the transmitting side to delete or update. There was a task that could not be done.

Therefore, in the scramble broadcasting system as described above, when one of a plurality of individual information stored in the receiving terminal is deleted or updated, the receiving terminal receives the individual information every time the individual terminal receives the individual information. The individual information obtained is compared with the individual information stored therein, and when the content of the same type of information is different, the individual information stored up to that point is updated using the received individual information. Had been done. In addition, the transmitting side repeatedly transmits the same individual information in consideration of a situation where the transmitted individual information is not received, for example, because the power of the receiving terminal is turned off. Therefore, the receiving terminal
As described above, there is a problem that the retransmitted individual information has to be collated many times with the individual information stored therein.

[0015] In another conventional scramble broadcasting system (for example, WOWWOW (trademark), where WOWWOW is an analog satellite broadcast), a serial management number is assigned to individual information transmitted on the transmission side. , It was possible to identify individual information, but on the receiving terminal,
Since the individual information is updated based on the continuity between the management number of the received individual information and the management number of the individual information stored therein, a problem has occurred. For example, in a state where the receiving terminal previously received and stored the individual information having the management number 1, the receiving terminal can receive the individual information having the management number 2 because the power was turned off. Instead, when the next transmitted individual information having the management number of 3 is received, the management number (= 1) of the stored individual information is received.
Since the management number (= 3) of the received individual information is not continuous, the individual information whose management number is 1 cannot be updated using the individual information whose management number is 3. was there.

The present invention has been made in view of such a situation, and the transmitting side assigns management information to individual information, and the receiving side manages the individual information hierarchically based on the management information. By doing so, it is possible to delete or update any individual information.

[0017]

An information transmitting apparatus according to a first aspect of the present invention includes a common information generating means for generating common information including a scramble key encrypted using a work key;
Individual information including a security key and encrypting the individual information using an individual information generating means for assigning a serial management number and an individual key corresponding to a predetermined information receiving device among the plurality of information receiving devices. Individual information encryption means and common information
Additional means for adding control information for controlling each information receiving device.

According to a third aspect of the present invention, there is provided an information transmitting method for generating common information including a scramble key encrypted using a work key, and generating individual information including a work key. An individual information generating step of assigning a serial management number; an individual information encrypting step of encrypting the individual information using an individual key corresponding to a predetermined information receiving apparatus of the plurality of information receiving apparatuses; And an additional step of adding control information for controlling each information receiving apparatus.

According to a fourth aspect of the present invention, there is provided a providing medium, comprising: a common information generating step of generating common information including a scramble key encrypted using a work key; and generating individual information including a work key. An individual information generating step of assigning a unique management number; an individual information encrypting step of encrypting the individual information using an individual key corresponding to a predetermined information receiving apparatus of the plurality of information receiving apparatuses; And a computer-readable program for causing the information transmitting apparatus to execute a process including an additional step of adding control information for controlling each information receiving apparatus.

According to a fifth aspect of the present invention, there is provided an information receiving apparatus, comprising: receiving means for receiving common information and encrypted individual information; and encrypted information received by the receiving means using the stored individual key. Individual information decryption means for decrypting the individual information and extracting the work key contained in the individual information, and using the work key, the encrypted scramble key contained in the common information received by the reception means. A scramble key decryption means for decrypting, a descrambling means for descrambling the scrambled information using the scramble key,
A storage unit for storing the individual information decoded by the individual information decoding unit; a comparison unit for comparing the management number of the individual information received by the reception unit with the management number of the individual information stored in the storage unit; Updating means for updating the individual information stored in the storage means in accordance with the comparison result; and individual information stored in the storage means based on the control information added to the common information received by the receiving means. And management means for managing

[0021] In the information receiving method according to the present invention, the receiving step of receiving the common information and the encrypted individual information, and the encrypted receiving of the encrypted individual information in the receiving step using the stored individual key. An individual information decrypting step of decrypting the individual information and extracting a work key included in the individual information, and using the work key to encrypt an encrypted scramble key included in the common information received in the receiving step. A descrambling key decrypting step for decrypting, a descrambling step for descrambling the scrambled information using the scramble key, a storing step for storing the individual information decoded in the individual information decoding step, and a receiving step. A comparison step of comparing the management number of the individual information with the management number of the individual information stored in the storage step,
In accordance with the comparison result of the comparing step, the updating step of updating the individual information stored in the storing step, and the individual information stored in the storing step based on the control information added to the common information received in the receiving step. And a management step of managing.

According to a ninth aspect of the present invention, there is provided the providing medium, wherein the receiving step receives the common information and the encrypted individual information, and the encrypted medium received in the receiving step using the stored individual key. An individual information decryption step of decrypting the individual information and extracting a work key included in the individual information, and using the work key to decrypt an encrypted scramble key included in the common information received in the reception step A descrambling key decrypting step, a descrambling step of descrambling the scrambled information using the scramble key, a storing step of storing the individual information decoded in the individual information decoding step, and an individual A comparison step of comparing the management number of the information with the management number of the individual information stored in the storage step; Corresponding to the update step of updating the individual information stored in the storage step, and a management step of managing the individual information stored in the storage step based on the control information added to the common information received in the reception step. A computer-readable program for causing an information receiving apparatus to execute a process including

An information management system according to claim 10 is
A common information generating means for generating common information including a scramble key encrypted using a work key; an individual information generating means for generating individual information including a work key and assigning a serial management number; Individual information encryption means for encrypting individual information using an individual key corresponding to a predetermined information receiving device among the information receiving devices of the above, and control information for controlling the individual information receiving device added to the common information An information transmitting device including an additional unit for performing the operation, a receiving unit for receiving the common information and the encrypted individual information, and the encrypted individual information received by the receiving unit using the stored individual key. And an individual information decryption unit for extracting a work key included in the individual information, and a decryption unit for decrypting an encrypted scramble key included in the common information received by the reception unit using the work key. Decryption means for descrambling scrambled information using a scramble key, storage means for storing the individual information decrypted by the individual information decryption means, and individual information received by the reception means. A comparison number for comparing the management number of the individual information stored in the storage means, and an update means for updating the individual information stored in the storage means in accordance with the comparison result of the comparison means, An information receiving apparatus including a managing unit for managing the individual information stored in the storage unit based on the control information added to the common information received by the receiving unit.

According to an eleventh aspect of the present invention, in the information management method, a common information generating step of generating common information including a scramble key encrypted using a work key, and generating individual information including a work key, An individual information generating step of assigning a serial management number; an individual information encrypting step of encrypting the individual information using an individual key corresponding to a predetermined information receiving apparatus of the plurality of information receiving apparatuses; An information transmitting method including an additional step of adding control information for controlling each information receiving apparatus, a receiving step of receiving common information and encrypted individual information, and using the stored individual key. And decrypting the encrypted individual information received in the receiving step and extracting a work key included in the individual information, and a receiving process using the work key. A scramble key decryption step of decrypting an encrypted scramble key included in the common information received in the map, a descrambling step of descrambling the scrambled information using the scramble key, and individual information. Corresponding to a storage step of storing the individual information decoded in the decoding step, a comparison step of comparing the management number of the individual information received in the reception step with the management number of the individual information stored in the storage step, and a comparison result of the comparison step An update step of updating the individual information stored in the storage step; and a management step of managing the individual information stored in the storage step based on the control information added to the common information received in the reception step. And an information receiving method.

According to a twelfth aspect of the present invention, there is provided an information transmitting apparatus, comprising: an individual information generating means for generating individual information including information for descrambling; and a management information providing means for providing hierarchical management information to the individual information. It is characterized by including.

According to a fourteenth aspect of the present invention, there is provided an information transmitting method comprising: an individual information generating step of generating individual information including information for descrambling; and a management information providing step of providing hierarchical management information to the individual information. It is characterized by including.

According to a fifteenth aspect of the present invention, the providing medium includes an individual information generating step of generating individual information including information for descrambling, and a management information providing step of adding hierarchical management information to the individual information. A computer-readable program for causing an information transmitting apparatus to execute a process including the above is provided.

[0028] In the information receiving apparatus according to the present invention, an individual information receiving means for receiving individual information including information for descrambling, and a storage for hierarchically storing the individual information received by the individual information receiving means. Means.

In the information receiving method according to the present invention, an individual information receiving step for receiving individual information including information for descrambling, and a storage for hierarchically storing the individual information received in the individual information receiving step And a step.

[0030] The providing medium according to claim 18 is a step of receiving individual information including information for descrambling, and a step of hierarchically storing the individual information received in the individual information receiving step. A program readable by a computer that causes the information receiving apparatus to execute the processing including:

An information management system according to claim 19 is
An information transmitting apparatus including individual information generating means for generating individual information including information for descrambling, management information providing means for providing hierarchical management information to the individual information, and information for descrambling And an information receiving apparatus including a storage unit for hierarchically storing the individual information received by the individual information receiving unit.

The information management method according to a twentieth aspect includes an individual information generating step of generating individual information including information for descrambling, and a management information providing step of providing hierarchical management information to the individual information. Information receiving method including: an individual information receiving step of receiving individual information including information for descrambling; and a storing step of hierarchically storing the individual information received in the individual information receiving step It is characterized by including.

[0033] The information transmitting apparatus according to claim 1, and claim 3.
In the information transmission method described in the above, and the providing medium described in the claim 4, common information including a scramble key encrypted using a work key is generated, and individual information including a work key is generated. A serial management number is assigned. Further, the individual information is encrypted using an individual key corresponding to a predetermined information receiving device among the plurality of information receiving devices, and control information for controlling each information receiving device is added to the common information.

An information receiving apparatus according to claim 5, wherein the information receiving apparatus is an information receiving apparatus.
In the information receiving method described in the above, and the providing medium according to the ninth aspect, the common information and the encrypted individual information are received, and received and encrypted using the stored individual key. The individual key is decrypted to extract a work key included in the individual key. Also, using the work key, the encrypted scramble key included in the received common information is decrypted, and using the scramble key,
The scrambled information is descrambled, the decoded individual information is stored, and the management number of the received individual information is compared with the management number of the stored individual information. Then, the stored individual information is updated. Further, the stored individual information is managed based on the control information added to the received common information.

In the information management system according to the tenth aspect and the information management method according to the eleventh aspect, common information including a scramble key encrypted using a work key is generated, and a work key is generated. Is generated and a serial management number is assigned. Further, the individual information is encrypted using an individual key corresponding to a predetermined information receiving device among the plurality of information receiving devices, and control information for controlling each information receiving device is added to the common information. In addition, the common information and the encrypted individual information are received, and the received encrypted individual information is decrypted using the stored individual key, and the work key included in the individual information is decrypted. Is extracted. In addition, the encrypted scramble key included in the received common information is decrypted using the work key, the scrambled information is descrambled using the scramble key, and the decrypted individual The information is stored, and the management number of the received individual information is compared with the management number of the stored individual information, and the stored individual information is updated according to the comparison result. Further, the stored individual information is managed based on the control information added to the received common information.

In the information transmitting apparatus according to the twelfth aspect, the information transmitting method according to the fourteenth aspect, and the providing medium according to the fifteenth aspect, individual information including information for descrambling is generated, Hierarchical management information is added to the individual information.

[0037] In the information receiving apparatus according to claim 16, the information receiving method according to claim 17, and the providing medium according to claim 18, individual information including information for descrambling is received, The received individual information is stored hierarchically.

In the information management system according to the nineteenth aspect and the information management method according to the twentieth aspect, individual information including information for descrambling is generated, and hierarchical management information is included in the individual information. Granted. Also,
Individual information including information for descrambling is received, and the received individual information is hierarchically stored.

[0039]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A configuration example of a scramble broadcasting system to which the present invention is applied will be described with reference to FIG. In this specification, the term “system” refers to an entire device including a plurality of devices and units.

In this scramble broadcasting system, a broadcasting device 1 for transmitting a scrambled broadcast wave (video signal and audio signal) to a broadcast satellite 2, a broadcast wave from the broadcast device 1 is relayed, and the receiving terminals 3-1 to 3-1 are relayed. 3-n (hereinafter, when it is not necessary to distinguish the receiving terminals 3-1 to 3-n individually,
(Referred to simply as a receiving terminal 3), a broadcasting satellite 2, a receiving terminal 3 for receiving broadcast waves and descrambling, and a public telephone line 4 for transmitting viewing information from the receiving terminal 3.

FIG. 2 shows a detailed configuration example of the broadcasting device 1. The program control device 11 outputs to the encoder 15 a control signal for controlling the digitization and compression method (code compression ratio) in the encoder 15 in accordance with the genre of the broadcast program. Further, the program control device 11 generates a number (program number) for specifying the program that has been compression-encoded by the encoder 15 and
Output to

[0042] The viewing information collecting and processing device 12 includes the receiving terminal 3
Processes viewing information and contract requests from viewers that are uplinked (uploaded) from the public telephone line 4 through
The result is output to the scramble control device 13 as contract information.

The scramble control device 13 supplies a work key to the related information sending device 14. In addition, the scramble control device 13 generates individual information that is individually transmitted to each receiving terminal 3 as needed. The individual information includes a work key. Furthermore, the scramble control device 13 stores the individual keys corresponding to all the receiving terminals 3-1 to 3-n, and stores the individual keys unique to the user (receiving terminal 3) who has a viewing contract for the program to be transmitted. Using the key, the individual information including the work key is encrypted, and the multiplexer 16
To supply. The details of the individual information will be described later.

The related information transmitting device 14 generates common information which is information accompanying the program and transmitted to all the receiving terminals 3-1 to 3-n. Further, the related information transmitting device 14 supplies the scramble key to the scrambler 17, encrypts the scramble key using the work key supplied from the scramble control device 13, and multiplexes the scramble key as a part of the common information (program information). 16 is output. The details of the common information will be described later.

The encoder 15 converts the AV signal (audio signal and video signal) of the input program into, for example, MPEG (Movin
g Picture Experts Group) 2 and compression-encodes them and outputs them to the multiplexer 16. Multiplexer 16
The time-division multiplexes the encoded AV signal from the encoder 1, the individual information from the scramble control device 13, and the common information from the related information transmitting device 14, and outputs the multiplexed signal to the scrambler 17.

The scrambler 17 is a device for transmitting the related information 1
Using the scramble key supplied from 4, the multiplexed signal output from the multiplexer 16 is scrambled. However, since the individual information and the common information of the multiplexed signals are information for controlling the receiving terminal 3, the individual information and the common information are not usually scrambled.

At the stage subsequent to the scrambler 17, devices for transmitting broadcast waves, such as a device for adding an error correction code (not shown) and a modulator, are provided.

Next, a detailed configuration example of the receiving terminal 3-1 will be described with reference to FIG. The receiving terminal 3-1 sets the set-top box 2 for descrambling the received wave (broadcast wave transmitted from the broadcast device 1 via the broadcast satellite 2) based on the viewing control information supplied from the security module 22. And set-top box 21
Module 22 that supplies viewing control information to the user
It consists of.

The demultiplexer 23 of the set-top box 21 converts a received wave supplied from a device for receiving a broadcast wave, such as a demodulator or an error correction signal decoding device (not shown), provided at a preceding stage thereof. , Separated into scrambled AV signals, individual information and common information,
The descrambler 2 converts the scrambled AV signal
4 to supply the individual information and the common information to the common / individual information analysis device 27 of the security module 22.

The descrambler 24 descrambles the scrambled AV signal from the demultiplexer 23 using the viewing control information (scramble key) supplied from the common / individual information analyzer 27, and obtains The obtained compression-coded AV signal is output to the decoder 25. The decoder 25 decodes the compression-encoded AV signal input from the descrambler 24 and outputs the decoded AV signal to, for example, a monitor (not shown).

The common / individual information analyzing device 27 of the security module 22 decrypts the individual information supplied from the demultiplexer 23 using the individual key stored therein, and supplies the decrypted individual information to the contract information storage device 28. In addition, common
When the individual information supplied to the individual information analysis device 27 is not intended for the receiving terminal 3-1, the common / individual information analysis device 27 decrypts the individual information using the individual key stored therein. Can not do. Therefore, common
The individual information analyzer 27 does not process the individual information that could not be decoded.

The common / individual information analysis device 27 compares the common information supplied from the demultiplexer 23 with the contract information stored in the contract information storage device 28, and determines whether the common information (program information) is a viewing contract. If the program corresponds to the program performing the decryption, the encrypted scramble key contained in the common information is decrypted using the work key contained in the Output to the rambler 24.

Further, the common / individual information analyzing device 27
If the common information supplied from the demultiplexer 23 describes an individual information management number as control information and a security module identifier corresponding to the security module 22 including itself, the individual information management number as control information Is executed (details of which will be described later).

Further, the common / individual information analysis device 27
When a program with a PPV contract is viewed, the viewing history is stored in the viewing information storage device 29. The contract information storage device 28 stores the supplied individual information under the control of the common / individual information analysis device 27.

The viewing history stored in the viewing information storage device 29 is output to the modem 26 of the set-top box 21 after a predetermined period has elapsed. The modem 26 transmits (uplinks) the viewing information input from the viewing information storage device 29 to the broadcasting device 1 via the public telephone line 4. Note that the security module 22 is composed of, for example, an IC card. Further, the configuration of the receiving terminals 3-2 to 3-n is the same as that of the receiving terminal 3-1;

By the way, in the scramble broadcasting system to which the present invention is applied, from the transmitting side (broadcasting apparatus 1),
By transmitting the common information including predetermined control information, it is possible to control an arbitrary receiving terminal 3.

FIG. 4 is a diagram showing all the receiving terminals 3 from the broadcasting device 1.
3 shows a data structure of common information (program information) transmitted to -1 to 3-n. As shown in the figure, the common information is a common information header indicating that it is common information,
Paid broadcasting station identification indicating the broadcasting station from which the common information is transmitted,
Other common information (program ID, service ID, scramble key encrypted with work key, etc.), individual information management number and security module identifier as control information, and errors for detecting code errors during transmission It consists of a detection code. The individual information management number and the security module identifier that are the control information will be described later.

FIG. 5 shows a data structure of individual information transmitted from the broadcasting device 1 to a predetermined receiving terminal 3-i among the receiving terminals 3-1 to 3-n. As shown in the figure, the individual information includes an individual information header indicating the individual information, a pay station identification indicating the broadcasting station from which the individual information is transmitted, and a plurality of information transmitted to the receiving terminal 3-i. Individual information management number consisting of a serial number (hereinafter also referred to as a management number) assigned to identify the individual information of
An individual information management branch number (hereinafter also referred to as a management branch number), which is a number for identifying a plurality of pieces of information to which the same individual number is assigned, and other individual information (contract information and its expiration date, contract A work key used for decrypting a scramble key code necessary for descrambling the program being used, and an error detection code for detecting a code error during transmission. in this way,
By assigning the pay broadcast station identification, the management number, and the management branch number to the individual information, the individual information can be managed hierarchically.

For example, if a 2-byte information amount is secured in the individual information management number, there is no need to initialize the individual information management number for 30 years even if the individual information is transmitted six times per day.

FIG. 6 shows the data structure of the individual information stored in the contract information storage device 28 of the receiving terminal 3-1. As shown in the figure, the contract information storage device 28
As for the individual information, for each pay broadcast station identification, a predetermined number (in FIG. 6, two pieces) of the information received in the latest order (one having a larger management number) in time is used. (Depending on the storage capacity of the contract information storage device 28), and a plurality of pieces of information (depending on the storage capacity of the contract information storage device 28) each having a management branch number are stored in each lower hierarchy. I have. The common / individual information analysis device 27 is supplied with the largest management number as valid individual information for each pay broadcast station identification.

For example, when it is desired to change the individual information (contract information) due to a change in the CCP contract or the like, the transmitting side (scramble control device 13) assigns an incremented management number to the changed individual information, and Send to 3.

The contract information storage device 28 of the receiving terminal 3 stores the individual information supplied from the common / individual information analysis device 27,
Classification is performed based on the pay broadcasting station identification, and then the maximum value of the management numbers (the management numbers corresponding to the latest individual information) of the predetermined number of individual information having the same pay broadcasting station identification stored up to that point is calculated. Then, the management numbers of the supplied individual information are compared.
In this case, the management number of the supplied individual information is determined to be larger than the maximum value of the management number of the stored individual information, and the management number of the predetermined number of the individual information stored so far is determined. Is deleted (the oldest individual information) and the supplied individual information is stored.

For example, when it is desired to add individual information (contract information) due to the addition of a PPC contract or the like, the transmitting side (scramble control device 13) adds the same management number as the previous time, The obtained management branch number is assigned and transmitted to the receiving terminal 3.

The contract information storage device 28 of the receiving terminal 3 stores the individual information supplied from the common / individual information analysis device 27,
Classification is performed based on the pay broadcasting station identification, and then the maximum value of the management numbers (the management numbers corresponding to the latest individual information) of the predetermined number of individual information having the same pay broadcasting station identification stored up to that point is calculated. Then, the management numbers of the supplied individual information are compared.
In this case, the management number of the supplied individual information is determined to be equal to the maximum value of the management number of the stored individual information, and the supplied individual information is determined by the management number of the management number having the maximum management number. It is stored in the lower hierarchy.

Further, for example, when it is desired to invalidate individual information (contract information) due to a user's viewing contract violation (payment of a fee, etc.), an invalid value is written on the transmission side (scramble control device 13). The individual information is provided with the incremented management number and transmitted to the receiving terminal 3.

The contract information storage device 28 of the receiving terminal 3 stores the individual information supplied from the common / individual information analysis device 27,
Classification is performed based on the pay broadcasting station identification, and then the maximum value of the management numbers (the management numbers corresponding to the latest individual information) of the predetermined number of individual information having the same pay broadcasting station identification stored up to that point is calculated. Then, the management numbers of the supplied individual information are compared.
In this case, the management number of the supplied individual information is determined to be larger than the maximum value of the management number of the stored individual information, and the management number of the predetermined number of the individual information stored so far is determined. Is deleted (the oldest individual information) and the supplied individual information is stored. As a result, the individual information having invalid information is supplied to the common / individual information analyzing device 27, so that the contract information is substantially invalidated (locking of individual information).

In order to make the contract information valid again, the transmitting side (scramble control device 13) may add the incremented management number to the individual information in which the valid value has been written and transmit it to the receiving terminal 3. (Unlock information).

For example, when it is desired to delete specific individual information (contract information) due to a malicious viewing contract violation of the user, the transmitting side (related information transmitting device 14)
As the control information in the shared information, an individual information management number of the individual information to be deleted and a security module identifier (for example, security module 22) for specifying the security module 22 of the receiving terminal 3 corresponding to the user
Device ID) and transmit.

The common / individual information analyzing device 27 of the receiving terminal 3
Determines that the security module identifier corresponding to the security module 22 including itself is described in the control information in the shared information, and determines the individual corresponding to the value described in the individual information management number as the control information. Information is deleted from the contract information storage device 28 (partial deletion of individual information).

On the transmitting side (related information transmitting apparatus 14), a predetermined value (for example, all 0) is described in the individual information management number as control information in the shared information, and the receiving terminal corresponding to the user is described. Security module 2 of 3
2 security module identifier (eg,
If the device ID of the security module 22 is described and transmitted, the common / individual information analysis device 27 of the receiving terminal 3
All individual information stored in the contract information storage device 28 is erased (all individual information is erased).

Further, with respect to the violating of the viewing contract of the malicious user, a predetermined value (for example, all 1) is added to the individual information management number as the control information in the shared information on the transmitting side (related information transmitting device 14). Is described, and a security module identifier (for example, the device ID of the security module 22) for specifying the security module 22 of the receiving terminal 3 corresponding to the user is described and transmitted. 27 destroys the function of the security module 22 (security module protection).

As described above, according to the present invention, the transmission side transmits the common information including predetermined control information, thereby updating, locking, and updating the individual information recorded in the specific receiving terminal 3. It is possible to unlock, partially erase, completely erase, and destroy security module functions.

Since the receiving terminal 3 manages the individual information using the management number, for example, the management number of the received individual information is one or more larger than the management number of the stored individual information. In this case, it is possible to specify the management number of the individual information that could not be received and request the broadcast device 1 to retransmit via the modem 26 and the public telephone line 4. Thus, it is possible to construct an interactive management system as well as a one-side management system only from the transmission side.

The present invention can be applied not only to satellite broadcasting but also to television broadcasting using terrestrial waves and cable television broadcasting.

Note that the computer program for performing each of the above processes can be provided to the user via a network medium such as the Internet or a digital satellite in addition to a medium such as a magnetic disk or a CD-ROM. it can.

[0076]

As described above, according to the information transmitting apparatus according to the first aspect, the information transmitting method according to the third aspect, and the providing medium according to the fourth aspect, the individual information including the work key is provided. Generates information and assigns a serial management number to the common information,
Since the control information for controlling the individual information receiving devices is added, it is possible for the information receiving device to delete or update any specified individual information by designating it.

According to the information receiving apparatus described in claim 5, the information receiving method described in claim 8, and the providing medium described in claim 9, the management number of the received individual information is stored and stored. Compare the management numbers of the individual information that are stored, update the stored individual information corresponding to the comparison result, and manage the stored individual information based on the control information added to the received common information. As a result, the specified individual information can be deleted or updated.

Further, according to the information management system of the tenth aspect and the information management method of the eleventh aspect, individual information including a work key is generated and assigned a serial management number, Since the control information for controlling the individual information receiving devices is added to the information, it is possible for the information receiving device to specify or delete any individual information and to delete or update the information. Further, the management number of the received individual information is compared with the management number of the stored individual information, and the stored individual information is updated corresponding to the comparison result.
Since the stored individual information is managed based on the control information added to the received common information,
The specified individual information can be deleted or updated.

An information transmitting apparatus according to claim 12,
According to the information transmission method described in claim 14 and the providing medium described in claim 15, hierarchical management information is added to individual information, so that arbitrary individual information can be transmitted to the information receiving apparatus. It can be deleted or updated.

According to the information receiving apparatus described in claim 16, the information receiving method described in claim 17, and the providing medium described in claim 18, the individual information is stored in a hierarchical manner. It is possible to delete or update the individual information that has been entered.

Further, according to the information management system of the nineteenth aspect and the information management method of the twentieth aspect, hierarchical management information is added to individual information. It is possible to delete or update any individual information. In addition, since the individual information is stored in a hierarchical manner, the specified individual information can be deleted or updated.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration example of a scramble broadcasting system to which the present invention has been applied.

FIG. 2 is a block diagram illustrating a configuration example of a broadcasting device 1 of FIG.

FIG. 3 is a block diagram illustrating a configuration example of a receiving terminal 3-1 in FIG. 1;

FIG. 4 is a diagram showing a data structure of common information.

FIG. 5 is a diagram showing a data structure of individual information.

6 is a diagram showing a data structure of individual information (contract information) stored in a contract information storage device 28 of FIG.

[Description of Signs] 1 broadcast device, 2 broadcast satellite, 3 receiving terminal, 4
Public telephone line, 11 program control device, 12 viewing information collection processing device, 13 scramble control device,
14 Related information transmission device, 15 Encoder, 16
Multiplexers, 17 scramblers, 21 set-top boxes, 22 security modules, 23 demultiplexers, 24 descramblers, 25 decoders, 26 modems, 27 common /
Individual information analysis device, 28 Contract information storage device, 29
Viewing information storage device

Continued on the front page (51) Int.Cl. ⁷ Identification FI FI Theme Court II (Reference) H04N 7/167 Z (72) Inventor Yoshiki Nakagawa 6-7-35 Kita Shinagawa, Shinagawa-ku, Tokyo Inside Sony Corporation ( 72) Inventor Yuko Ohira 6-7-35 Kita-Shinagawa, Shinagawa-ku, Tokyo Inside Sony Corporation (72) Inventor Masami Yamashita 6-35-35 Kita-Shinagawa, Shinagawa-ku, Tokyo Inside Sony Corporation (72) Inventor Sumio Murai 6-35, Kita-Shinagawa, Shinagawa-ku, Tokyo F-term in Sony Corporation (reference) 5C064 BA01 BA07 BB07 BC06 BC17 BC18 BC20 BC22 BC23 BD07 BD08 BD09 BD13 CA14 CB01 CB08 CC04 5J104 AA01 AA16 BA03 EA18 NA01 NA02 NA03 NA36 PA05

Claims (20)

[Claims] 1. An information transmitting apparatus for transmitting information scrambled using a scramble key to a plurality of information receiving apparatuses each having a unique individual key, the information transmitting apparatus including the scramble key encrypted using a work key. Common information generating means for generating common information; individual information generating means for generating individual information including the work key and assigning a serial management number; and receiving predetermined information among the plurality of information receiving apparatuses. An individual information encryption unit that encrypts the individual information using an individual key corresponding to the device; and an additional unit that adds control information for controlling each of the information receiving devices to the common information. Characteristic information transmission device. 2. The information transmitting apparatus according to claim 2, wherein the adding unit adds the security module identifier and the individual information to the common information as control information. 3. An information transmitting method of an information transmitting apparatus for transmitting scrambled information using a scrambling key to a plurality of information receiving apparatuses having a unique individual key, wherein the information transmitting apparatus encrypts the information using a work key. A common information generating step of generating common information including a scramble key; an individual information generating step of generating individual information including the work key and assigning a serial management number; An individual information encrypting step of encrypting the individual information using an individual key corresponding to a predetermined information receiving apparatus; and an adding step of adding control information for controlling each of the information receiving apparatuses to the common information. An information transmission method comprising: 4. An information transmitting apparatus for transmitting information scrambled using a scramble key to a plurality of information receiving apparatuses each having a unique individual key, including the scramble key encrypted using a work key. A common information generating step of generating common information; an individual information generating step of generating individual information including a work key and assigning a serial management number; and a predetermined information receiving apparatus of the plurality of information receiving apparatuses. Executing an individual information encrypting step of encrypting the individual information using an individual key corresponding to (i), and an adding step of adding control information for controlling each of the information receiving apparatuses to the common information. A computer-readable storage medium for providing a computer-readable program. 5. An information receiving apparatus for receiving scrambled information, comprising: receiving means for receiving common information and encrypted individual information; and receiving means using a stored individual key. An individual information decryption unit for decrypting the received encrypted individual information and extracting a work key included in the individual information; and using the work key, the individual information decryption unit included in the common information received by the reception unit. A scramble key decrypting means for decrypting the encrypted scramble key, a descrambling means for descrambling the scrambled information using the scramble key, and individual information decrypted by the individual information decrypting means. Storage means for storing the management number of the individual information received by the receiving means and the management number of the individual information stored in the storage means Means, an updating means for updating the individual information stored in the storage means, in accordance with a comparison result of the comparing means, based on control information added to the common information received by the receiving means, An information receiving device comprising: a managing unit that manages the individual information stored in the storage unit. 6. The comparing means determines whether a management number of the individual information received by the receiving means is larger than a management number of the individual information stored in the storage means. When it is determined that the management number of the individual information received by the receiving unit is larger than the management number of the individual information stored in the storage unit, the updating unit updates the individual information received by the receiving unit. The information receiving apparatus according to claim 5, wherein the information is used to update the individual information stored in the storage unit. 7. The information receiving apparatus according to claim 6, wherein the storage unit sets the management information having the largest management number among the plurality of stored pieces of individual information as the effective individual information. 8. An information receiving method of an information receiving apparatus for receiving scrambled information, comprising: a receiving step of receiving common information and encrypted individual information; An individual information decrypting step of decrypting the encrypted individual information received in the receiving step and extracting a work key included in the individual information; and a common information received in the receiving step using the work key. A scramble key decryption step of decrypting an encrypted scramble key included in the information, a descrambling step of descrambling the scrambled information using the scramble key, and the individual information decryption step. A storage step of storing the decrypted individual information; a management number of the individual information received in the receiving step; A comparing step of comparing the management numbers of the individual information stored in the step; an updating step of updating the individual information stored in the storing step in accordance with the comparison result of the comparing step; and a common step received in the receiving step. A management step of managing the individual information stored in the storage step based on control information added to the information. 9. An information receiving apparatus for receiving scrambled information, comprising: a receiving step of receiving common information and encrypted individual information; and a receiving step using the stored individual key. An individual information decryption step of decrypting the received encrypted individual information and extracting a work key included in the individual information; and using the work key, the individual information decryption step included in the common information received in the reception step. A scramble key decryption step of decrypting the encrypted scramble key, a descrambling step of descrambling the scrambled information using the scramble key, and the individual information decrypted in the individual information decryption step. And a management number of the individual information received in the receiving step, and a storage number stored in the storing step. A comparing step of comparing the management numbers of the individual information; an updating step of updating the individual information stored in the storing step in accordance with a comparison result of the comparing step; and an adding step of adding to the common information received in the receiving step. A computer-readable program for executing a process including a management step of managing the individual information stored in the storage step based on the control information stored in the storage medium. 10. An information management system comprising: an information processing device for transmitting scrambled information; and a plurality of information receiving devices for receiving the scrambled information. Common information generating means for generating common information including the scramble key encrypted by using; and individual information generating means for generating individual information including a work key and assigning a serial management number; An individual information encrypting unit that encrypts the individual information by using an individual key corresponding to a predetermined information receiving device of the information receiving devices; and control information that controls each of the information receiving devices in the common information. The information receiving apparatus further comprises: receiving means for receiving the common information and the encrypted individual information; and a stored individual key. Using the work key, decrypting the encrypted individual information received by the receiving unit, and extracting a work key included in the individual information, using the work key, A scramble key decryption unit for decrypting an encrypted scramble key included in the received common information; a descrambling unit for descrambling the scrambled information using the scramble key; and the individual information. Storage means for storing the individual information decoded by the decoding means; comparison means for comparing the management number of the individual information received by the receiving means with the management number of the individual information stored in the storage means; Updating means for updating the individual information stored in the storage means in accordance with the comparison result of the above, and control added to the common information received by the receiving means. Based on the broadcast, the information management system comprising a management unit for managing the individual information stored in the storage means. 11. An information management method for an information management system comprising: an information processing device for transmitting scrambled information; and a plurality of information receiving devices for receiving the scrambled information. The information transmitting method includes: a common information generating step of generating common information including the scramble key encrypted using a work key; and an individual generating step of generating individual information including a work key and assigning a serial management number. An information generating step, an individual information encrypting step of encrypting the individual information using an individual key corresponding to a predetermined information receiving device of the plurality of information receiving devices, and An adding step of adding control information for controlling the information receiving device, wherein the information receiving method of the information receiving device comprises: Receiving the individual information, decrypting the encrypted individual information received in the receiving step by using the stored individual key, and extracting a work key included in the individual information Individual information decrypting step, using the work key, a scramble key decrypting step of decrypting the encrypted scramble key included in the common information received in the receiving step, using the scramble key, A descrambling step for descrambling the scrambled information, a storing step of storing the individual information decoded in the individual information decoding step, a management number of the individual information received in the receiving step, and storing in the storing step A comparing step of comparing the management numbers of the individual information thus obtained, and An update step of updating the individual information stored in the storage step; and a management step of managing the individual information stored in the storage step based on the control information added to the common information received in the reception step. An information management method, characterized in that: 12. An information transmitting apparatus for transmitting scrambled information to a plurality of information receiving apparatuses, wherein: individual information generating means for generating individual information including information for descrambling; An information transmission device comprising: a management information providing unit for providing basic management information. 13. The information transmitting apparatus according to claim 12, wherein the management information is a pay broadcast station identification, an individual information management number, or an individual information management branch number. 14. An information transmitting method of an information transmitting apparatus for transmitting scrambled information to a plurality of information receiving apparatuses, wherein: an individual information generating step of generating individual information including information for descrambling; A management information providing step of providing hierarchical management information to individual information. 15. An information transmitting apparatus for transmitting scrambled information to a plurality of information receiving apparatuses, an individual information generating step of generating individual information including information for descrambling, Providing a computer-readable program for executing a process including a management information providing step of providing basic management information. 16. An information receiving apparatus for receiving scrambled information, comprising: individual information receiving means for receiving individual information including information for descrambling; and individual information received by the individual information receiving means. Storage means for hierarchically storing the information. 17. An information receiving method of an information receiving apparatus for receiving scrambled information, wherein: an individual information receiving step of receiving individual information including information for descrambling; and the individual information receiving step. Storing the received individual information in a hierarchical manner. 18. An information receiving apparatus for receiving scrambled information, an individual information receiving step of receiving individual information including information for descrambling, and an individual information received in the individual information receiving step. Providing a computer readable program for executing a process including a storage step of hierarchically storing the information. 19. An information management system comprising: an information transmitting apparatus for transmitting scrambled information; and a plurality of information receiving apparatuses for receiving the scrambled information, wherein the information transmitting apparatus transmits the scrambled information. An information generating unit for generating individual information including information for canceling, and a management information providing unit for adding hierarchical management information to the individual information, wherein the information receiving apparatus is configured to cancel the scramble. An information management system, comprising: individual information receiving means for receiving individual information including the above information; and storage means for hierarchically storing the individual information received by the individual information receiving means. 20. An information management method for an information management system, comprising: an information transmission device that transmits scrambled information; and a plurality of information reception devices that receive the scrambled information. The information transmitting method includes: an individual information generating step of generating individual information including information for descrambling; and a management information providing step of providing hierarchical management information to the individual information. The information receiving method of the present invention comprises: an individual information receiving step of receiving individual information including information for descrambling; and a storing step of hierarchically storing the individual information received in the individual information receiving step. Characteristic information management method.