JPH0541864A - Recipient terminal equipment and its charging method - Google Patents

Abstract

PURPOSE:To realize the recipient terminal equipment and its charging method in which illegal application of viewing charge is made difficult by allowing the recipient to apply recording representing a non-viewing state in the subscription broadcast. CONSTITUTION:A decoder 1 implements descramble processing in accordance to a viewing request of a recipient and ciphers a data with a secret key of the decoder 1 only when the viewing recording is not viewed to record the result onto an IC memory card 5, the recording in the descramble state is stopped and a discount charge from all the viewing charge is decided based on the recording of the part recorded in the IC memory card 5 and not viewed yet later. Since the application of the recording is advantageous to the recipient, the effect of returning the IC memory card 5 definitely is obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a receiver terminal device and a charging method for collecting a charge according to a viewing condition of a receiver in pay broadcasting.

[0002]

2. Description of the Related Art A receiver terminal device for pay broadcasting and a billing method thereof have been studied in the past. For example, "Technical problems of pay system in satellite broadcasting" edited by Satellite Broadcasting System Study Group (February 1984), there is a description regarding the receiver terminal device and its charging method.

FIG. 3 is a block diagram showing a conventional charging method using a receiver terminal device. Here, 9 is a broadcaster, 10 is a decoder, 11 is an IC memory card, and the decoder 10 and the IC memory card 11 constitute a receiver terminal.

The broadcaster 9 transmits the scrambled signal and its decryption key to the decoder 10. The decoder 10 receives the ID authentication code from the inserted IC memory card 11 and authenticates it, and then performs the descrambling process according to the viewing ON signal of the receiver, and records the viewing record in the IC memory card 11. At a later date, the receiver declares the viewing record recorded on the IC memory card 11 by going to a place where the IC memory card reading terminal is located and paying the fee accordingly.

[0005]

However, in the above structure, the receiver records the viewing record signal from the decoder 10, and the recorded viewing history is self-reported by the receiver. Even if the encrypted portion in 10 is physically protected, the interface is modified so that the output from the decoder 10 is not written in the IC memory card 11, or the declaration is made by forgery of the IC memory card 11. It is possible to make an improper declaration in which a smaller amount than the actual amount is recorded in the IC memory card 11 which is written and declared in the card. As described above, in the charging method that requires the receiver terminal device that records the viewing to be used and requires the record to be correctly reported, from the viewpoint of the reporter, reducing the report amount as much as possible can reduce the payment amount. Therefore, there is a problem in that it is possible to make an illegal report that declares less than the actual viewing amount by avoiding writing the viewing record in the recording means. Further, in the charging method in which the viewing information is recorded in the detachable record holding means and the record is reported to the receiver like the IC memory card 11 of the conventional example, the receiver inevitably declares the recorded content. There was a problem that needed consideration.

The present invention eliminates this problem and provides a receiver terminal device that makes fraudulent reporting difficult, and also makes fraudulent reporting using the receiving terminal device difficult and inevitably causes the recipient to declare the recorded contents. It provides a billing method as described above.

[0007]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a receiver terminal device for viewing and listening to pay broadcasts and viewing and listening when the receiver views the program by this viewing and listening means. A signal generating means for generating a recording signal when not watching, rather than generating and recording the signal shown
A record holding unit for recording the signal generated by the signal generating unit is provided, and a record which is not viewed at a later date is declared to the fee collector.

[0008]

In the receiver terminal device according to the present invention, the receiver collects the signal recorded by the recording and holding means, which signal is generated by the signal generating means and is not viewed by the receiver. By notifying the person who is not viewing, the failure to write the record in the formal record keeping means for viewing is fraudulent. Make it difficult. Further, by fraudulently generating a signal that is not generated by viewing by encrypting and generating a signal indicating that it is not being viewed, fraudulently reporting the amount that was not viewed by the receiver terminal device It is difficult to modify the encryption section protected by, and the signal indicating that it is not viewed is diverted as the signal of another receiver terminal device or generated by another receiver terminal device. This makes it difficult to use the generated signal as the signal generated by the own decoder. In addition, by notifying that you are not watching and using a billing method that determines the discount amount, the notification will benefit the recipient, so the receiver will inevitably declare the viewing result. ..

[0009]

1 is a block diagram of a receiver terminal device according to a first embodiment of the present invention. As shown in FIG. 1, 1 is a decoder, 2 is a descramble circuit, 3 is a control circuit, 4 is an IC memory card interface, and 5 is an IC memory card. The IC memory card interface 4 and the IC memory card 5 constitute a record holding means. The decoder 1 comprises a descrambling circuit 2, a control circuit 3 and an IC memory card interface 4, and constitutes a part of a viewing means for viewing a pay broadcast. Is entered. The decoder input consists of a scramble signal and related information, and the scramble signal is sent to the descramble circuit 2.
The relevant information is input to the control circuit 3. The IC memory card 5 is composed of an IC memory card ID authentication code and a readable / writable memory for recording and holding, and holds the IC memory card ID authentication code.

The operation of the receiving terminal device of this embodiment having the above configuration will be described below. At the time of viewing, first, the IC memory card 5 is connected to the decoder 1. The control circuit 3 reads and authenticates the ID authentication code in the IC memory card 5 via the IC memory card interface 4, and then decrypts the scramble key included in the decoder input when the viewing ON signal is input. ,
By sending it to the descramble circuit 2 and causing the descramble circuit 2 to descramble the scrambled signal and output the program video signal, viewing by the viewing means becomes possible. Further, the control circuit 3 has an RSA encryption means and its secret key inside, and the descramble circuit 2
Is not performing the descrambling process, the signal indicating that the user is not watching using the initial value m and the parameter t related to the program, which has been sent in advance, when the signal indicating that the user is not watching is generated. Signal generation with the contents shown in (Equation 1)

[0011]

[Equation 1]

As a means, this signal S is generated and written in the IC memory card 5 via the IC memory card interface 4. However, n is a public key of RSA encryption, which is a product of two large prime numbers, and k is a secret key of the decoder, which is physically protected in the decoder. The IC memory card 5 is controlled by the control circuit 3 and records and holds the signal s indicating that the user is not watching.

As described above, according to this embodiment, the signal written from the decoder 1 including the signal generating means to the IC memory card 5 is a signal indicating that the user is not watching,
The act of avoiding writing does not benefit the recipient. In addition, by making the private key k of the RSA encryption given to the decoder 1 unique to the decoder 1, the signal indicating that the viewer is not viewing is provided with a signature of the decoder so that it cannot be diverted to another receiver terminal device. You can

FIG. 2 is a block diagram showing a charging method according to the second embodiment of the present invention. In FIG. 2, 6 is a broadcaster, 7 is a decoder, and 8 is an IC memory card. The decoder 7 and the IC memory card 8 constitute the receiver terminal device of the first embodiment.

The broadcaster 6 encrypts and transmits the scrambled signal, the decryption key, and the initial value m when the decoder 7 writes a record in the IC memory card 8 so that only the decoder 7 can decrypt it. The decoder 7 has the private key k of the RSA public key encryption, and in the descrambling process of the program,
The ID authentication code in the inserted IC memory card 8 is authenticated, and descramble processing is performed in accordance with the request for reproduction. Then, only when it is not viewed, the secret key k and m sent from the broadcaster 6 are calculated for (Equation 1),
Write to the IC memory card 8. However, t is a parameter related to the program. The signal written in the IC memory card 8 is later transmitted to the broadcaster 6 via the terminal at the data collection place, and the broadcaster 6 receives the RS of the decoder 7 from the RS.
A The public key of the public key code is used to decrypt the signal from the IC memory card 8 to find the time or program that is not being watched, determine the discount amount from the fee when watching all programs, and pay the discounted fee. Charge the recipient.

As described above, according to this embodiment, since the recording on the IC memory card 8 is accompanied by the signature of the decoder 7, it is difficult to transfer the recording to another decoder. Further, as a charging method from the recording of the IC memory card 8, there is a charging method of subtracting the unviewed amount declared by the IC memory card 8 from the charge amount when all programs are viewed. Declaration of the recorded contents is beneficial to the viewer, and conversely, not declaring is disadvantageous to the recipient, so that the IC memory card 8 must be returned to the data collection place. Become.

In the receiver terminal device of this embodiment, R
Although it was provided with the SA encryption, it may be provided with another encryption algorithm, and although an IC memory card is used as the record holding means, a magnetic recording card is also possible and another record holding means is used. Good. In the charging method of this embodiment, the initial value m is transmitted from the broadcaster directly to the decoder of the receiver terminal device. However, when collecting the records in the IC memory card via the terminal at the data collection location, the initial value m The decoder may read the initial value m from the IC memory card by writing m to the IC memory card.
The receiver terminal of the present invention is similar to the receiver terminal of the present embodiment.
Although the example in which the record holding means uses the detachable IC card 5 has been shown in the present embodiment, the charge is calculated by automatically transmitting the contents recorded in the record holding means via the transmission line. It goes without saying that it can also be used in other charging methods such as the above method.

[0018]

As described above, the receiver terminal device and the billing method thereof according to the present invention are provided with the record holding means for recording and holding the received contents not viewed and the output means for outputting the held contents. Since the receiver declares the amount that he / she has not viewed from the total viewing amount, the omission of the declaration is disadvantageous to the viewer. Conversely, if the declaration exceeds the actual results, a signal indicating that the decoder is not viewing is displayed at the time of viewing. Since it is not generated, it will be difficult to omit the declaration unless the physically protected part in the decoder is broken, and by encrypting the signal indicating that it is not viewed, it can be transmitted to another decoder of the signal indicating that it is not viewed. It is possible to provide a receiver terminal device that makes it difficult to divert, and it is possible to provide a billing method that makes it difficult for fraudulent reporting and inevitably causes the recipient to report the viewing record.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a receiver terminal device and a charging method thereof according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram of a charging method according to a second embodiment of the present invention.

FIG. 3 is a block diagram of a charging method using a conventional receiving terminal.

[Explanation of symbols]

 1 Decoder 2 Descramble Circuit 3 Control Circuit 4 IC Memory Card Interface 5 IC Memory Card 6 Broadcaster

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hironori Murakami 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (6)

[Claims] 1. A viewing means for viewing a pay broadcast, a signal generating means for generating a signal indicating that the user is not watching when the viewing means is not watching, and a signal output by the signal generating means. Recipient terminal device having record holding means for recording and holding. 2. The receiver terminal device according to claim 1, wherein the record holding means records the signal output by the signal generating means on a removable recording medium. 3. The receiver terminal device according to claim 1, wherein the signal generation means encrypts a signal indicating that the signal is not being viewed, and the record holding means records and holds the encrypted signal. 4. The receiver terminal device according to claim 3, wherein the signal generating means generates an encrypted signal including a secret key signal unique to the receiving terminal device. 5. A discount from the amount of charge when all programs are viewed from a signal indicating that the program is not viewed, which is recorded and held in the record holding means of the receiver terminal device according to any one of claims 1 to 4. A billing method that determines the amount and calculates the fee. 6. A secret key signal unique to the recipient terminal device is read from the encrypted signal written in the record holding means of the recipient terminal device according to claim 3 or 4, and each recipient terminal is automatically read. The billing method according to claim 5, wherein a fee for the device is determined.