JP2003178216A - Data transmission system and receiver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a data transmission system and a receiver thereof capable of easily recognizing an individual of a viewer family and surely protecting data contents, in data communication using digital data broadcasting. <P>SOLUTION: When a viewer P of a viewer family 5 purchases a commercial product of a catalog shipper 9 by using the digital data broadcasting provided by a broadcast station 7, the viewer P previously informs the catalog shipper 9 of his or her individual information or the like to be registered as a member, and acquires a member number and an IC card 23 for a member from the catalog shipper 9. The viewer P inserts the IC card 23 into an IC card reader 19 to apply for purchase of the commercial product provided by the catalog shipper 9. The member information is recorded in the IC card 23, input data relating to the member information and product purchase request are made as application data and encrypted by using a secret key recorded in the IC card 23. The encrypted application data are transmitted to a server 41 from the receiver 11, and the server 41 decodes the application data by using a disclosure key corresponding to the secret key. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data transmission system and a digital data broadcasting receiver for transmitting application data using digital data broadcasting.

[0002]

2. Description of the Related Art Recently, digital data broadcasting has started,
Bidirectional communication is performed between the viewer and the broadcasting station. In order to view the digital data broadcast, a receiver for receiving the digital data broadcast is required. Usually, an IC card is attached to the receiver and sold.
A unique receiving ID and private key data unique to this IC card are recorded in the C card. This IC card is used for two-way data communication between a viewer and a broadcasting station, descrambling of pay programs, and the like.

In order to receive the digital data broadcast, the viewer informs the broadcasting station or the IC card management agent in advance of the information on the ID number of the IC card, the receiving / viewing household and all the users, such as address and mail. Register information such as number, phone number, name of representative, personal number, date of birth. There are various methods of registration, but you can apply by mailing or faxing the application form with the above required information to the broadcasting station or agency, or by entering the above required information using the Internet. Etc.

Next, the broadcasting station registers and holds the necessary information sent from the viewer in the database. After the registration is completed, the viewer inserts the IC card into the digital data broadcasting receiver and accesses the server on the broadcasting station side through the public telephone line connected to the receiver. The server of the broadcasting station recognizes the IC card number inserted in the receiver, authenticates it, and permits the use. After that, the data input by the viewer is encrypted by the secret key recorded in the IC card and transmitted to the server on the broadcast station side. The server on the broadcasting station side is I
It is possible to obtain the viewer information input from the C card number or the like.

[0005]

Problems to be solved by the invention When using such digital data broadcasting for application processing such as electronic commerce, mail order, and electronic application, there are the following problems. (Problem 1) When there are multiple viewers in the viewing household, it is necessary to specify the applicant, but normally one IC card is provided for each receiver, that is, one IC card is provided for each viewing household. is there. Therefore, it is difficult to authenticate the individual user of the viewing household using the conventional IC card. (Problem 2) When a viewer makes an application via a data broadcast such as a CM to a station other than a broadcasting station, such as a bank or a mail-order company, information not registered with the broadcasting station, such as a bank account number and mail-order sales When transmitting the company member number and other personal information, it is necessary to input the number each time using a remote controller or the like, which makes the input work complicated. (Problem 3) In the communication of application data, when the server of the broadcasting station receives the application data from the viewer and sends it to the bank or mail order company, the broadcasting station uses the public key corresponding to the private key of the IC card. If available, the contents of the data can be easily browsed, and there is a problem in terms of data protection. (Problem 4) When a server other than a broadcasting station, for example, a server of a bank or a mail-order company and a receiver of a viewer household communicate directly with each other,
The application data cannot be decrypted unless the server of the bank or mail-order company is in an environment where the public key of the IC card on the receiver side can be obtained.

The present invention has been made in view of the above problems, and an object of the present invention is to easily recognize an individual in a viewer's household in data communication using digital data broadcasting, and An object of the present invention is to provide a data transmission system and a receiver for digital data broadcasting which are surely protected.

[0007]

A first invention for achieving the above object comprises a receiver for digital data broadcasting connected to a public line, and a server connected to the public line. Then, the receiver includes a reading unit that reads information recorded in the IC card, a data input unit that receives a data input, information read by the reading unit, and data input by the data input unit. A data transmission system comprising: means for creating application data based on the above, and transmission means for transmitting the application data to the server.

The first aspect of the present invention is used for applications such as electronic commerce, mail order, and electronic applications using digital data broadcasting. In the first aspect of the invention, the IC card is an IC card issued by the applicant to the individual user. The information recorded on the IC card is read, and application data is created based on the information and the data input from the remote controller of the receiver for digital data broadcasting, and the application data is sent from the receiver to the application destination. Sent to the server. At this time, the application data is encrypted with the secret key recorded in the IC card. The server receives the encrypted application data, decrypts the application data using the public key corresponding to the secret key, and accepts the application. Therefore, since the data read from the IC card is used to create the application data, the user does not need to input data, and the application data is transmitted to the server without leakage.

A second invention is a digital data broadcasting receiver connected to a public line, a first server connected to the public line, and a second server connected to the public line. The receiver comprises a first reading means for reading the information recorded in the first IC card, and a second reading means.
Second reading means for reading information recorded in the IC card, and data input means for receiving data input,
The second read-out means, which creates application data based on the information read out by the second read-out means and the data input by the data input means, and which is recorded in the second IC card. The data transmission system is characterized in that the application data is encrypted using the secret key and the application data is encrypted using the first secret key.

Similarly, the second invention is also used for application such as electronic commerce, mail order, electronic application using digital data broadcasting. Here, the first IC card is an IC for receiving digital data broadcasting attached to the receiver.
The second IC card is a card issued by the applicant to the individual user. The information recorded in the second IC card is read out, and the application data is created based on the information and the data input from the remote controller of the digital data broadcasting receiver or the like. At this time, the application data is encrypted with the secret key recorded in the second IC card and further encrypted with the secret key recorded in the first IC card. The encrypted application data is transmitted to the first server, the first server receives the encrypted application data, and uses the first public key corresponding to the first secret key to download the application data. Decrypt. Thereafter, the application data is transmitted to the second server, the second server receives the encrypted application data, and uses the second public key corresponding to the second secret key to obtain the application data. Decrypt and accept application. According to the second invention, the application data is transmitted to the second server without leaking through the first server.

A third aspect of the present invention is a receiver for digital data broadcasting, which is connected to a server via a public line, comprising:
Reading means for reading the information recorded on the C card;
Data input means for receiving data input, means for creating application data based on the information read by the reading means and data input by the data input means, and transmitting the application data to the server And a transmitting means for performing the operation. Here, the transmitting means encrypts the application data using the secret key recorded in the IC card and transmits it to the server.
This application data relates to applications such as electronic commerce, mail order, and electronic application using digital data broadcasting.

A fourth invention is a receiver for digital data broadcasting, which is connected to the first server and the second server via a public line, and stores information recorded in the first IC card. First reading means for reading, second reading means for reading information recorded in the second IC card,
Data input means for receiving data input, and
The information read by the second reading means,
Application data is created based on the data input by the data input means, the application data is encrypted using the second secret key recorded in the second IC card, and the first data is further encrypted. The receiver is characterized in that the application data is encrypted using a secret key. Here as well, the application data relates to applications such as electronic commerce, mail order, and electronic application using digital data broadcasting.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a schematic configuration diagram of a data transmission system 1 according to an embodiment of the present invention.
In the embodiment shown in FIG. 1, a case where a viewer of a viewer's house 5 purchases a product of a mail order company (mail order company) 9 using digital data broadcasting provided by a broadcasting station 7 will be described as an example. . Digital data broadcasting is BS digital broadcasting, CS digital broadcasting, or the like.

A receiver 11, a television 15 and the like are installed in the viewer's house 5. The receiver 11 is connected to the public line 3.
The receiver 11 is a receiver necessary for receiving digital data broadcasting. The receiver 11 has an IC card reader 13
Is connected (or built-in), and the data written in the IC card 21 attached to the receiver 11 is read by the IC card reader 13.

FIG. 2 is a diagram showing data recorded in the IC card 21. A reception ID 71 for receiving digital data broadcast, a secret key 73, and the like are recorded in the IC card 21. The viewing household, together with its receiving ID 71,
Notify the broadcasting station 7 of names, personal numbers, personal information such as date of birth, personal information such as date of birth, representative numbers, other user information and personal numbers of all users in the viewing household, and use digital data broadcasting To register. The reception ID 71 is used for authentication and descramble of the viewer's house 5 after registration. The private key 73 is used when encrypting the data transmitted from the receiver 11.

A server 31 is installed in the broadcasting station 7. The server 31 is connected to the public line 3 and has a database 33.
And so on. The database 33 holds customer data 34. The customer data 34 is the reception ID 71 of the viewer's house 5.
As described above, the information is notified from the viewer's household.

The mail order company (mail order company) 9 has a server 4
1 is installed. The server 41 is connected to the public line 3 and has a database 43 and the like. The database 43 holds customer data 44. The customer data 44 is data necessary for purchasing a product of the mail-order company 9, and is acquired from the member at the time of member registration.

Here, a case where a viewer P who is a household member of the viewer's house 5 purchases a product of the mail order company 9 using digital data broadcasting will be described as an example. The viewer P notifies the mail order company 9 in advance of his / her personal information,
Register as a member, and enter the membership number and membership I from the mail-order company 9.
The C card 23 is acquired. That is, the IC card 23 is an IC card dedicated to the viewer P.

FIG. 3 is a diagram showing data recorded in the IC card 23. In the IC card 23, data regarding the viewer P, such as member information 55 such as member name, member number, address, telephone number, date of birth, occupation, financial institution used, account number, etc., and secret key 63, etc. are recorded. It Also,
The member information 55 is also held in the database 43 of the mail order company 9 as the customer data 44.

At the viewer's house 5, a receiver operating remote controller 17 to which an IC card reader 19 for reading the contents of the IC card 23 is connected (or incorporated) is installed. Now, let us consider a case where the viewer P purchases a product of the mail-order company 9 by looking at the digital data broadcast provided by the broadcasting station 7. The viewer P inserts the IC card 23 into the IC car reader 19 and applies for the purchase of the product offered by the mail order company 9.

The application process will be described below. FIG. 4 is a flowchart when the receiver 11 of the viewer's house 5 and the server 41 of the mail-order company 9 directly communicate with each other. The receiver 11 is an IC which is a membership card dedicated to the viewer P.
The card 23 is accepted (step 201), and the data input regarding the purchase desire of the product by the viewer P is accepted (step 202).

Member information 55 such as the member number and name of the viewer P is stored in the IC card 23, for example, XML (eXte).
It is recorded in the form of a nable markup language). When the IC card 23 is inserted into the card reader 19 of the remote controller 17, the data recorded in the IC card 23 is transmitted to the receiver 11, and the receiver 11 accepts the input from the remote controller 17.

The viewer P operates the remote controller 17 to select a product desired to be purchased, and inputs the purchase quantity and the like. Next, the receiver 11 displays the membership number, name, input data and the like as application data on the screen of the television 15 (step 203).

FIG. 5 is a view showing a confirmation screen 53 for application data. On the confirmation screen 53, a photograph of the desired product is displayed and application data is displayed. The application data includes, for example, an applicant's member number, name, product name, price, desired purchase quantity, payment method, financial institution name to be used, account number, and the like.

Member information 55 is recorded in the IC card 23 in XML format, for example, and application data is created from the member information 55 and data input from the remote controller.

Next, the receiver 11 accepts the application decision by the viewer (step 204) and accesses the server 41 (step 205). Viewer P confirms the application data displayed on confirmation screen 53, and then confirms confirmation screen 5
The intention to decide the application is transmitted to the receiver 11 by selecting the “Purchase” button 3 or the like.

Upon receiving the application decision from the viewer P, the receiver 11 accesses the server 41 via the public line 3. Information such as the telephone number for access used at this time is described in the XML for digital data broadcasting of the program,
Alternatively, it is recorded in advance in the member IC card 23, and the receiver 11 reads it and the server 4
Access to 1 is started.

The receiver 11 sends the application data to the IC card 2
It is encrypted with the secret key recorded in No. 3 and transmitted to the server 41 (step 206). The server 41 receives the encrypted application data, decrypts it with the public key corresponding to the private key of the IC card 23 (step 207), accepts the application data, and ends the communication (step 208).

FIG. 6 is an explanatory diagram of transmission / reception of application data. As shown in FIG. 6, the card-specific secret key 63 is recorded on the IC card 23. Further, the server 41 of the mail order company 9 holds and manages the public key 65 corresponding to the secret key 63.

The receiver 11 uses the private key 63 recorded in the IC card 23 to encrypt the application data. The encrypted application data 67 is sent from the receiver 11 to the public line 3
Is transmitted to the server 41 via. And the server 41
Receives the application by decrypting the application data 67 encrypted using the public key 65.

In the present embodiment, by using the IC card 23 issued by the mail-order company 9 exclusively for members, which of the users at the viewer's house 5 has applied, for example, in this case For example, it is easily authenticated that the viewer P has applied for product purchase.

Further, the IC card 23 has a member information 5 in advance.
5 is recorded and the application data is created using it, so that the viewer P does not need to input the member information for each application.

The application data includes the address of the viewer P,
Since important personal information such as name and bank account is included and is encrypted using the secret key 63 unique to the IC card 23 and transmitted to the server 41, the application data is also reliably protected.

Next, a second embodiment will be described. In the first embodiment, the case where the viewer P directly sends the application data to the mail-order company 9 has been described.
In this embodiment, the case where the application data sent from the viewer P is sent to the mail order company 9 via the broadcasting station 7 will be described.

FIG. 7 is a flow chart of application processing in the second embodiment. The receiver 11 accepts the receiving IC card 21 and the IC card 23 dedicated to the viewer P (step 501), and accepts the data input regarding the purchase request of the product by the viewer P (step 502).

The viewer P selects a desired product from the remote controller 17 and inputs the purchase quantity and the like. Next, the receiver 11 displays the membership number, name, input data and the like as application data on the screen of the television 15 (step 503).

Here, the confirmation screen for the application data is the same as the confirmation screen 53 shown in FIG. In the IC card 23,
For example, the member information 55 is recorded in XML format,
The application data is created from the member information 55 and the data input from the remote controller.

Next, the receiver 11 accepts the application decision by the viewer (step 504) and accesses the server 31 (step 505). When the viewer P confirms the application decision, the receiver 11 starts accessing the server 31.

Information such as the telephone number for access used at this time is described in the XML for digital data broadcasting of the program or recorded in the IC card 21, and the receiver 11 can read it. By server 3
Access to 1 is started.

The receiver 11 sends the application data to the IC card 2
3 is encrypted with the secret key 63 recorded on the server 3, and further encrypted with the secret key 73 recorded on the IC card 21.
1 (step 506). The server 31 receives the encrypted application data, decrypts it with the public key corresponding to the private key of the IC card 21 (step 507), and transmits the application data to the server 41 (step 508).

The server 41 receives the encrypted application data, decrypts it with the public key corresponding to the private key of the IC card 23 (step 509), accepts the application, and ends the communication (step 510).

FIG. 8 is an explanatory diagram of transmission / reception of application data according to the second embodiment. As shown in FIG. 8, the secret key 73 is recorded in the IC card 21, and the secret key 63 is recorded in the IC card 23.

The server 31 of the broadcasting station 7 holds and manages the public key 75 corresponding to the secret key 73. The server 41 of the mail order company 9 holds and manages the public key 65 corresponding to the secret key 63.

The receiver 11 uses the secret key 63 recorded in the IC card 23 to encrypt the application data, and further uses the secret key 73 recorded in the IC card 21 to encrypt the data including the application data. Turn into.

The encrypted data is transmitted from the receiver 11 to the server 31 via the public line 3. Then, the server 31 decrypts the data 81 out of the encrypted data using the public key 75 and accepts it. Data 81
Is, for example, the reception ID 71 and the like, and thus it is understood that the server 31 has received the application data from the viewer's house 5. The public key 7 held by the server 31
In 5, the encrypted data 83 cannot be decrypted.

Next, the data 83, which is still encrypted, is sent from the server 31 via the public line 3 to the mail order company 9
Is transmitted to the server 41. The server 41 uses the public key 65
The data 83 encrypted by is decrypted and the application is accepted.

This data 83 is data relating to an application for purchasing a product. For example, the member number, name, and
The product name, price, desired purchase quantity, payment method, financial institution name to be used, account number, and the like.

As described above, according to the second embodiment,
Server 4 of mail-order company 9 via server 31 of broadcasting station 7
Even if the application data is transmitted to 1, information such as the applicant's name, financial institution name, and account number is transmitted to the mail order company 9 without being leaked to the broadcasting station 7 or the like.

Note that, in common with the first and second embodiments, the receiver 11 has an IC for the IC card 23.
A card reader may be connected. It is also possible to provide the receiver 11 itself with an insertion port for inserting the IC card 21 and the IC card 23, and read the data recorded on the card.

[0050]

As described above in detail, according to the present invention, in the data communication using the digital data broadcasting, the individual of the viewer's household can be easily recognized and the data content is surely protected. It is possible to provide a data transmission system and a receiver for digital data broadcasting.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a data transmission system 1 according to an embodiment of the present invention.

FIG. 2 is a diagram showing data recorded in the IC card 21.

FIG. 3 is a diagram showing data recorded in the IC card 23.

FIG. 4 is a flowchart showing a process of transmitting application data.

FIG. 5 is a diagram showing a confirmation screen 53 for application data.

FIG. 6 is an explanatory diagram of the operation of transmitting and receiving application data

FIG. 7 is a flowchart showing an application data transmission process according to the second embodiment.

FIG. 8 is an explanatory diagram of application data transmission / reception operation in the second embodiment.

[Explanation of symbols]

1 ... Data transmission system 3 ... Public line 5 ... Viewer's house 7 ... Broadcasting station 9 ... Mail order company 11 ... Receiver 21 ………… IC card 23 ... IC card 31 ……… Server 41 ......... Server

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Claims (15)

[Claims] 1. A reading means for reading information recorded in an IC card, comprising: a receiver for digital data broadcasting connected to a public line; and a server connected to the public line. Data input means for receiving data input, means for creating application data based on the information read by the reading means and data input by the data input means, and the application data for the server A data transmission system comprising: 2. The data transmission system according to claim 1, wherein said transmission means encrypts and transmits the application data using a secret key recorded in said IC card. 3. The server according to claim 2, wherein the server receives the encrypted application data and decrypts the encrypted application data by using a public key corresponding to the private key. Data transmission system. 4. The information recorded on the IC card is XM
The data transmission system according to claim 1, wherein the data transmission system is recorded in the L format. 5. A receiver for digital data broadcasting connected to a public line, a first server connected to the public line, and a second server connected to the public line, The receiver includes a first reading unit that reads information recorded in a first IC card, a second reading unit that reads information recorded in a second IC card, and a data input unit that receives data input. And the information read by the second reading means,
Application data is created based on the data input by the data input means, the application data is encrypted using the second secret key recorded in the second IC card, and the first data is further encrypted. A data transmission system, wherein the application data is encrypted using a secret key. 6. The encrypted application data is transmitted to the first server and decrypted using a first public key corresponding to the first secret key. 5. The data transmission system described in 5. 7. The application data that is encrypted among the application data that is decrypted using the first public key is transmitted to the second server and corresponds to the second secret key. 7. The data transmission system according to claim 6, wherein the data is decrypted by using a second public key that does. 8. The data transmission system according to claim 5, wherein the information recorded in the second IC card is recorded in an XML format. 9. The data transmission system according to claim 1, wherein the application data relates to an application for electronic commerce, mail order, electronic application, etc. using digital data broadcasting. 10. A receiver for digital data broadcasting, connected to a server via a public line, comprising: a reading unit for reading information recorded in an IC card; a data input unit for receiving a data input; and the reading. A means for creating application data based on the information read by the means and the data input by the data input means; and a transmission means for transmitting the application data to the server. And receiver. 11. The receiver according to claim 10, wherein the transmitting means encrypts the application data using a secret key recorded in the IC card and transmits the application data. 12. The information recorded on the IC card is X
The receiver according to claim 10, wherein the receiver is recorded in ML format. 13. A receiver for digital data broadcasting connected to a first server and a second server via a public line, the first data reading unit reading information recorded in a first IC card. Read information, second reading means for reading information recorded in the second IC card, and data input means for receiving data input, and information read by the second reading means,
Application data is created based on the data input by the data input means, the application data is encrypted using the second secret key recorded in the second IC card, and the first data is further encrypted. A receiver characterized in that the application data is encrypted using a secret key. 14. The information recorded in the second IC card is recorded in XML format.
The receiver according to 3. 15. The receiver according to claim 10, wherein the application data relates to an application for electronic commerce, mail order, electronic application, etc. using digital data broadcasting.