JP5523272B2 - COMMUNICATION DEVICE, TV RECEPTION DEVICE, COMMUNICATION SYSTEM, TV RECEPTION SYSTEM, AND REGISTRATION METHOD - Google Patents

Description

  The present invention relates to a communication device, a television reception device, a communication system, a television reception system, and a registration method that allow other communication devices to be easily registered in the communication device.

  A remote control (remote operation) device that remotely operates the television receiver by communicating an operation signal to the television (television) receiver having a communication function is used. Some television receivers not only receive television broadcast waves but also connect to an external server device via a network so that various data can be communicated. Such a television receiver receives not only an operation signal from the remote control device but also data to be transmitted to an external server device. The data received from the remote control device is, for example, personal information of the user, and there are cases in which leakage to an unauthorized user or an external server device should be prevented.

  Therefore, when data is transmitted from a valid remote control device registered in the television receiver, the data may be received and transmitted to an external server device. Thus, reception of data sent from an unregistered unauthorized remote control device or transmission of the received data to an external server device is prohibited to prevent data from leaking to an unauthorized user or the like. Registration of the remote control device to the television receiver is performed, for example, by attaching a storage medium storing the identification information of the remote control device to the television receiver (see, for example, Patent Document 1).

JP 2002-77143 A

  However, the conventional technique has a problem that it takes time to attach a storage medium, and the remote control device cannot be easily registered in the television receiver.

  The present application has been made in view of such circumstances. The purpose is to provide a communication device with a registration unit for registering another communication device stored in the storage unit and communicating with the communication device, so that the other communication device can be easily registered in the communication device, a television set. To provide a receiving device, a communication system, a television receiving system, and a registration method.

The communication device disclosed in the present application includes a first communication unit that communicates with another communication device stored in the storage unit in a communication device including a storage unit that can store another communication device. Based on the identification information of the other communication device received by the first communication unit, the authentication unit authenticates the other communication device stored in the storage unit, and the authentication unit authenticates the communication device as a valid communication device. If the registration unit for registering the identification information of the first other communication apparatus communicating with the communication unit, a second communication unit for communicating with another communication device that registered the identification information by the registration unit, the encryption A generation unit for generating a key, wherein the first communication unit is configured to transmit the encryption key generated by the generation unit to another communication device authenticated by the authentication unit, In association with the encryption key generated by the generation unit The identification information of the other communication device is registered, and the second communication unit communicates with another communication device corresponding to the identification information using an encryption key associated with the identification information. It is characterized by the above.
The communication device disclosed in the present application includes means for determining whether or not an expiration date of the encryption key is associated with the encryption key, and the registered encryption key is within the expiration date. If the registered encryption key is not within the expiration date, another encryption key is generated.
The communication device disclosed in the present application includes a first communication unit that communicates with another communication device stored in the storage unit in a communication device including a storage unit that can store another communication device. Based on the identification information of the other communication device received by the first communication unit, the authentication unit authenticates the other communication device stored in the storage unit, and the authentication unit authenticates the communication device as a valid communication device. A registration unit that registers identification information of another communication device that has communicated with the first communication unit, and a second communication unit that communicates with another communication device that has registered the identification information with the registration unit. The first communication unit is configured to receive an encryption key from another communication device authenticated by the authentication unit, and the registration unit is associated with the encryption key received by the first communication unit, and Register the identification information of other communication devices. There, the second communication unit is characterized that you have to communicate with another communication device corresponding to the identification information using the encryption key associated with the identification information.
The communication device disclosed in the present application includes means for determining whether or not an expiration date of the encryption key is associated with the encryption key, and the registered encryption key is within the expiration date. If the registered encryption key is not within the expiration date, the identification information of the other communication device stored in the storage unit is registered in association with the other encryption key received by the first communication unit. It is characterized by that.
A communication device disclosed in the present application includes a storage unit that stores a manufacturer public key, and the identification information is a remote control electronic certificate that includes an electronic signature encrypted with a manufacturer private key, and the authentication unit includes: By decrypting the electronic signature included in the identification information received by the first communication unit using the manufacturer public key stored in the storage unit, the other communication device stored in the storage unit is authenticated. It is characterized by being.

  In the present application, when another communication device is registered in the communication device as a communication target of the communication device, the other communication device is stored in a storage unit included in the communication device. The first communication unit of the communication device communicates identification information with other communication devices. And a communication apparatus registers another communication apparatus by registering identification information. The second communication unit of the communication device communicates with the registered communication device.

  In the communication device disclosed in the present application, the first communication unit includes a connection terminal provided in the storage unit, and communicates with another communication device connected via the connection terminal. It is characterized by.

  In the present application, when another communication device is stored in the storage unit included in the communication device, the connection terminal provided in the storage unit is electrically connected to the other communication device. And a communication apparatus communicates via the connection terminal between the other communication apparatuses accommodated.

  The communication device disclosed in the present application is characterized in that the first communication unit performs wireless communication.

  In the present application, when another communication device is stored in the storage unit of the communication device, the communication device wirelessly communicates the identification information with the other communication device.

  The communication device disclosed in the present application further includes an authentication unit that authenticates another communication device stored in the storage unit based on the information received by the first communication unit, and the registration unit is configured by the authentication unit. When authentication is made as a valid communication device, the identification information of the other communication device is registered.

  In the present application, another communication device stored in the storage unit of the communication device is authenticated by the communication device based on the identification information of the other communication device. When the communication apparatus authenticates that the other communication apparatus accommodated is a legitimate apparatus, the communication apparatus registers identification information of the other communication apparatus.

  The communication device disclosed in the present application further includes a generation unit that generates an encryption key, and the first communication unit transmits the encryption key generated by the generation unit to another communication device stored in the storage unit. The registration unit registers the identification information of the other communication device in association with the encryption key generated by the generation unit, and the communication unit stores the encryption key associated with the identification information. It communicates with the other communication apparatus corresponding to the said identification information using.

  In the present application, an encryption key is generated by the communication device for other communication devices registered by the communication device. The communication device registers another communication device in association with the encryption key, and transmits the generated encryption key to the other communication device. Communication between the communication device and another registered communication device is encrypted using the encryption key, and decrypted using the encryption key by the communication device and the other communication device.

  In the communication device disclosed in the present application, the first communication unit receives an encryption key from another communication device stored in the storage unit, and the registration unit is received by the first communication unit. The identification information stored in the storage unit is registered in association with an encryption key, and the second communication unit uses the encryption key associated with the identification information to perform another communication corresponding to the identification information. It is characterized by communicating with the apparatus.

  In the present application, an encryption key is generated by another communication device for another communication device registered by the communication device. The other communication device transmits the encryption key to the communication device. The communication device registers the other communication device in association with the encryption key received from the other communication device. Communication between the communication device and another registered communication device is encrypted using the encryption key, and decrypted using the encryption key by the communication device and the other communication device.

  In the communication device disclosed in the present application, the second communication unit includes a determination unit that determines whether to use an encryption key according to communication contents, and the second communication unit uses the encryption key by the determination unit. If it is determined, communication is performed using an encryption key.

  In the present application, when the communication between the communication device and another communication device is communication content to be prevented from leaking, for example, data, the communication is encrypted using an encryption key. In addition, when the communication between the communication device and another communication device is a communication content that does not need to prevent leakage, for example, an operation signal, the communication is not encrypted.

  A television receiver disclosed in the present application includes the communication device described above and a reception unit that receives a television broadcast, and is remotely operated by another communication device with which the second communication unit communicates.

  In the present application, the television receiver includes a communication device. The television receiver receives a television broadcast and communicates with another registered communication device by the communication device. When registering another communication device as a communication target in the television receiver, the other communication device is stored in a storage unit included in the communication device of the television receiver. The 1st communication part of a communication apparatus communicates identification information between the other communication apparatuses accommodated. And a communication apparatus registers another communication apparatus by registering identification information. The television receiver communicates an operation signal with another registered communication device and is remotely operated by the other communication device. The second communication unit of the communication device communicates with the registered communication device.

The communication system disclosed in the present application is a communication system including a first communication device and a second communication device having a storage unit capable of storing the first communication device. The first communication unit that communicates with the second communication device stored in the storage unit, and the second communication device received by the first communication unit is stored in the storage unit based on the identification information. An authentication unit that authenticates the second communication device that has been registered, and a registration unit that registers identification information of the second communication device communicated by the first communication unit when the authentication unit authenticates the communication device as a legitimate communication device. And a second communication unit that communicates with the second communication device that registered the identification information by the registration unit, and the second communication device communicates with the first communication unit. with 3 a communication unit, a fourth communication unit that communicates with the second communication unit The first communication device further includes a generation unit that generates an encryption key, and the first communication unit transmits the encryption key generated by the generation unit to the second communication device authenticated by the authentication unit. The registration unit registers the identification information of the second communication device in association with the encryption key generated by the generation unit, and the second communication unit associates with the identification information. It characterized that you are so as to communicate with the second communication device corresponding to the identification information using the obtained encryption key.
The communication system disclosed in the present application is a communication system including a first communication device and a second communication device having a storage unit capable of storing the first communication device. The first communication unit that communicates with the second communication device stored in the storage unit, and the second communication device received by the first communication unit is stored in the storage unit based on the identification information. An authentication unit that authenticates the second communication device that has been registered, and a registration unit that registers identification information of the second communication device communicated by the first communication unit when the authentication unit authenticates the communication device as a legitimate communication device. And a second communication unit that communicates with the second communication device that registered the identification information by the registration unit, and the second communication device communicates with the first communication unit. 3 communication units and a fourth communication unit communicating with the second communication unit The first communication unit is configured to receive an encryption key from the second communication device authenticated by the authentication unit, and the registration unit is associated with the encryption key received by the first communication unit, The identification information of the second communication device is registered, and the second communication unit communicates with the second communication device corresponding to the identification information using an encryption key associated with the identification information. It is made to do so.

  In the present application, when the first communication device is stored in the storage unit of the second communication device, the first communication unit of the second communication device is connected to the third communication unit of the second communication device. Communicating identification information and the like. The registration unit of the first communication device registers the second communication device by registering the identification information of the second communication device. The second communication unit of the second communication device communicates with the registered fourth communication unit of the first communication device.

The television reception system disclosed in the present application is a television reception system including a television reception device and a remote operation device that remotely operates the television reception device, wherein the television reception device includes a storage unit that houses the remote operation device; The television-side first communication unit that communicates with the remote control device stored in the storage unit, and the remote-control device identification information received by the TV-side first communication unit is stored in the storage unit. An authentication unit for authenticating the remote operation device, and a registration unit for registering identification information of the remote operation device communicated by the first communication unit on the television side when the authentication unit authenticates the remote operation device. A television-side second communication unit that communicates with the remote operation device registered by the registration unit, and the remote operation device communicates with the television-side first communication unit. , And an operation-side second communication section that communicates with the television-side second communication section, the television receiver includes a generator for generating an encryption key, the first communication unit the television side, the The encryption key generated by the generation unit is transmitted to the remote operation device authenticated by the authentication unit, and the registration unit is associated with the encryption key generated by the generation unit and identification information of the remote operation device The second communication unit on the television side communicates with the remote control device corresponding to the identification information using an encryption key associated with the identification information, and the operation The first communication unit on the side receives the encryption key transmitted from the first communication unit on the television side, and the second communication unit on the operation side receives the encryption key received by the first communication unit on the operation side. To communicate with Characterized in that that.
The television reception system disclosed in the present application is a television reception system including a television reception device and a remote operation device that remotely operates the television reception device, wherein the television reception device includes a storage unit that houses the remote operation device; The television-side first communication unit that communicates with the remote control device stored in the storage unit, and the remote-control device identification information received by the TV-side first communication unit is stored in the storage unit. An authentication unit that authenticates the remote operation device; a registration unit that registers the remote operation device communicated by the first communication unit on the television side when the authentication unit authenticates the remote operation device; and the registration unit A television-side second communication unit that communicates with the remote operation device registered by the remote operation device, wherein the remote operation device communicates with the television-side first communication unit; Te An operation-side second communication unit that communicates with the second-side communication unit, the remote operation device includes a generation unit that generates an encryption key, and the operation-side first communication unit includes the generation unit Is transmitted to the television receiver, and the second communication unit on the operation side communicates with the encryption key generated by the generation unit. The communication unit is configured to receive an encryption key from the remote operation device authenticated by the authentication unit, and the registration unit is associated with the encryption key received by the television side first communication unit, The second communication unit on the TV side communicates with the remote control device corresponding to the identification information using an encryption key associated with the identification information. It is characterized by that.

  In the present application, when registering a remote control device in a television receiver, the remote control device is stored in a storage unit of the television receiver. The television-side first communication unit of the television receiver communicates identification information and the like with the operation-side first communication unit of the controller device. And the registration part of a television receiver registers the remote control apparatus accommodated by registering identification information. The television-side second communication unit of the television receiver communicates operation signals, various data, and the like with the registered operation-side second communication unit of the remote operation device. Thus, the television receiver is remotely operated by the registered remote operation device and communicates various data.

  The television reception system disclosed in the present application is a television reception system including a television reception device and a remote operation device that remotely operates the television reception device, wherein the television reception device includes a storage unit that houses the remote operation device; A television-side first communication unit that communicates with the remote control device stored in the storage unit; and a television-side second communication unit that communicates with the remote control device, wherein the remote control device includes: An operation-side first communication unit that communicates with the television-side first communication unit, a registration unit that registers a television receiver that communicates with the operation-side first communication unit, and a television receiver that is registered by the registration unit And an operation-side second communication unit that communicates with each other.

  In the present application, when the remote control device is stored in the storage unit of the television receiver, the connection terminal provided in the storage unit is electrically connected to the remote control device. Then, the television receiver communicates with the stored remote control device via the connection terminal.

  In the television reception system disclosed in the present application, the television reception device includes a generation unit that generates an encryption key, and the first communication unit on the television side transmits the encryption key generated by the generation unit to the remote operation device. The second communication unit on the television side communicates using the encryption key generated by the generation unit, and the first communication unit on the operation side transmits from the first communication unit on the television side. The operation-side second communication unit is configured to receive the received encryption key, and the operation-side second communication unit communicates using the encryption key received by the operation-side first communication unit.

  In the present application, an encryption key is generated by the television receiver for the remote control device registered by the television receiver. The television receiver registers the remote operation device in association with the encryption key and transmits the generated encryption key to the remote operation device. Communication between the television receiver and the registered remote control device is encrypted using the encryption key.

  In the television reception system disclosed in the present application, the remote operation device includes a generation unit that generates an encryption key, and the operation-side first communication unit transmits the encryption key generated by the generation unit to the television reception device. The second communication unit on the operation side communicates using the encryption key generated by the generation unit, and the first communication unit on the television side transmits from the first communication unit on the operation side. The television-side second communication unit is configured to receive the encryption key that has been received, and to communicate using the encryption key received by the television-side first communication unit.

  In the present application, an encryption key is generated by the remote operation device for the remote operation device registered by the television receiver. The remote control device transmits the encryption key to the television receiver. The television receiver registers the remote operation device in association with the encryption key received from the remote operation device. Communication between the television receiver and the registered remote control device is encrypted using the encryption key.

The registration method disclosed in the present application is a registration method for registering the other communication device in a communication device having a storage unit in which the other communication device can be stored. The communication device authenticates the other communication device stored in the storage unit based on the identification information of the other communication device with which the communication device communicated, and the communication device is a legitimate communication device. When authenticating, the communication device generates an encryption key, the communication device transmits the generated encryption key to another authenticated communication device, and the communication device associates the generated encryption key with the other encryption key. The identification information of the communication device is registered .
The registration method disclosed in the present application is a registration method for registering the other communication device in a communication device having a storage unit in which the other communication device can be stored. The communication device and the communication device communicate with each other, and the communication device authenticates the other communication device stored in the storage unit based on the identification information of the other communication device with which the communication has been performed. When authenticating as a valid communication device, the communication device receives an encryption key from another authenticated communication device, and the communication device registers the identification information of the other communication device in association with the received encryption key. It is characterized by.

  In the present application, when another communication device is registered in the communication device as a communication target of the communication device, the other communication device is stored in a storage unit included in the communication device. The communication device communicates identification information and the like with another accommodated communication device. And a communication apparatus registers another communication apparatus by registering identification information.

  According to one aspect of the device and method, the communication device can easily register another communication device by providing the communication device with a registration unit that registers another communication device stored and communicated in the storage unit. It becomes possible.

It is a typical perspective view which shows a television receiver and a remote control device. It is a block diagram which shows the example of the internal hardware of a television receiver and a remote control device. It is a chart which shows the example of a record layout of an electronic certificate. It is explanatory drawing for demonstrating the example of the signature method of an electronic certificate. It is a flowchart which shows the procedure of a registration process. It is a flowchart which shows the procedure of a registration process. It is the block diagram which showed the information memorize | stored in a memory | storage part by a registration process. It is the block diagram which showed the information memorize | stored in a memory | storage part by a registration process. 10 is a block diagram illustrating an example of internal hardware of a television receiver and a remote control device according to Embodiment 2. FIG. 10 is a flowchart illustrating a registration process procedure according to the second embodiment. 10 is a flowchart illustrating a registration process procedure according to the second embodiment. It is explanatory drawing for demonstrating the example of the production | generation method of an encryption key.

Embodiment 1
Hereinafter, embodiments will be specifically described with reference to the drawings. The communication device according to the present application enables communication with other communication devices, and for example, records or reproduces video and audio recorded on a storage medium such as a television (television) receiver, an optical disk, and a magnetic disk. And a server device that performs various data processing. The television receiver is, for example, a television receiver that receives a digital television broadcast wave and displays a selected program video, or a set-top box that displays a program video on an external display device. The television receiver has a function of communicating various data by connecting to an external network, for example.

  In this case, the television receiver displays a login screen, an operation screen, a display screen, and the like related to various services provided by the external network on the display unit or the external display device. When the communication device is a television receiver or the like, the other communication device according to the present application is, for example, a remote control device (remote operation device) that remotely operates the television receiver by communicating an operation signal with the television receiver. ). The remote control device transmits not only the operation signal but also data that the television receiver communicates with the external server device to the television receiver.

  The data communicated between the remote control device and the television receiver is, for example, data recorded on a recording medium attached to the remote control device. Such data is data indicating personal information, purchase information, billing information, and the like recorded on a recording medium such as a credit card or a prepaid card. Moreover, when the communication device is a server device, the other communication device according to the present application is, for example, a terminal device that communicates data with the server device. In this embodiment, a television receiver and a remote control device will be described as examples of the communication device and other communication devices.

  FIG. 1 is a schematic perspective view showing a television receiver and a remote control device. The television receiver 1 can be remotely operated by the remote control device 2, receives a television broadcast wave, and displays it on the display unit 12c. Further, the television receiver 1 has a pocket-shaped storage unit 10 that stores the remote control device 2 on the side surface. The storage unit 10 has a connection terminal 17. The remote control device 2 includes an operation unit 22 including various switches for receiving operations from a user, and a connection terminal 27 that is connected to the connection terminal 17 when stored in the storage unit 10. The storage unit 10 is not limited to the case where the storage unit 10 is provided on the side surface of the television receiver 1. In addition, the storage unit 10 may be provided inside the housing of the television receiver 1. In this case, the remote control device 2 may be stored in the storage portion 10 by inserting the remote control device 2 into an insertion hole provided on the surface of the housing of the television receiver 1.

  FIG. 2 is a block diagram illustrating an example of internal hardware of the television receiver 1 and the remote control device 2. A white arrow in the figure indicates wired communication performed between the television receiver 1 and the remote control device 2. The television receiver 1 includes a receiving unit 12a that receives a digital television broadcast wave and outputs a broadcast signal, and a video / audio processing unit 12b that processes the broadcast signal and outputs a video / audio signal. The display unit 12c is, for example, a liquid crystal panel, and has a built-in speaker. The display unit 12c displays video and emits sound based on the video / audio signal output by the video / audio processing unit 12b. The television receiver 1 also includes a control unit 11 that controls each internal hardware unit connected via the bus 11a, a storage unit 13, a wired communication unit 14, a power supply unit 15, and RF (Radio Frequency) communication. Part 16.

  The storage unit 13 includes a television electronic certificate 130 as identification information of the television receiver 1, a public key and a private key (hereinafter referred to as a television public key 131 and a television secret key 132) of the television receiver 1, and a manufacturer. The public key (hereinafter referred to as the manufacturer public key 133) is stored in advance. The storage unit 13 also stores a remote control electronic certificate 230, which will be described later, which is identification information of the remote control device 2, and also functions as a registration unit that registers the remote control device 2 in the television receiver 1 (see FIG. 7). Further, the storage unit 13 stores the encryption key 134 generated by the control unit 11 for the registered remote control device 2 in association with the identification information of the remote control device 2 together with the expiration date of the encryption key 134 (see FIG. 8). ).

  The storage unit 13 may be a non-volatile memory such as a flash memory in order to store the TV electronic certificate 130, the TV public key 131, the TV private key 132, and the manufacturer public key 133 in advance. An IC chip or the like is desirable. The wired communication unit 14 functions as a television-side first communication unit that communicates identification information of the television receiver 1 and the remote control device 2. The power supply unit 15 performs stabilization or voltage conversion on the power supplied from a commercial power supply or the like, and supplies the power to each internal hardware unit of the television receiver 1. Further, when the remote control device 2 is connected to the connection terminal 17, the power supply unit 15 supplies power to the remote control device 2 through the connection terminal 17.

  The RF communication unit 16 functions as a television-side second communication unit that communicates operation signals and various data with the registered remote controller 2 by radio waves. The data communicated by the RF communication unit 16 is data read from an external recording medium (to be described later) connected to the remote control device 2 or data to be written to the external recording medium. When the control unit 11 of the television receiver 1 transmits data to be written to an external recording medium connected to the remote control device 2 to the registered remote control device 2 through the RF communication unit 16, the control unit 11 associates the data with the identification information of the remote control device 2. Data is encrypted using the encryption key 134 stored in the storage unit 13.

  When the data received from the remote control device 2 by the RF communication unit 16 is encrypted and the identification information of the transmission source remote control device 2 is stored in the storage unit 13, the control unit 11 is associated with the identification information. The stored encryption key 134 is read and decrypted using the encryption key 134. When the RF communication unit 16 receives an operation signal sent from the remote control device 2, the control unit 11 controls each part of the internal hardware according to the operation signal. Thereby, the television receiver 1 is remotely operated by the remote control device 2.

  The remote control device 2 includes a control unit 21 that controls each internal hardware unit connected via the bus 21a, a storage unit 23, a wired communication unit 24, a battery 25, an RF communication unit 26, a connection terminal 27, 28a and a card communication unit 28. In the storage unit 23, a remote control electronic certificate 230 as identification information of the remote control device 2, a public key and a private key of the remote control device 2 (hereinafter referred to as a remote control public key 231 and a remote control private key 232), and a manufacturer's public information are stored. A key (hereinafter referred to as a manufacturer public key 233) is stored in advance. The manufacturer public key 133 stored in the television receiver 1 and the manufacturer public key 233 stored in the remote control device 2 have the same contents. The storage unit 23 also functions as a registration unit that stores the television electronic certificate 130 that is identification information of the television receiver 1 and registers the television receiver 1 in the remote control device 2 (see FIG. 7).

  Further, the storage unit 23 stores the encryption key 134 generated by the control unit 21 for the registered television receiver 1 in association with the identification information of the television receiver 1 together with the expiration date of the encryption key 134. The storage unit 23 may be a non-volatile memory such as a flash memory like the storage unit 13, but is preferably an IC chip having tamper resistance. The wired communication unit 24 functions as an operation-side first communication unit that communicates identification information of the remote control device 2 and the television receiver 1. The battery 25 supplies power to each internal hardware part of the remote control device 2. Further, when the connection terminal 27 is connected to the connection terminal 17 of the television receiver 1, the battery 25 is supplied with power from the power supply unit 15 of the television receiver 1 via the connection terminals 17 and 27 and is charged by the power supply. The

  The card communication unit 28 communicates data with a card-type external recording medium connected to the connection terminal 28a, and reads data from or writes data to the external recording medium. The external recording medium connected to the connection terminal 28a is, for example, a flash memory. Further, an external recording medium having a communication function such as an IC card may be connected. In this case, for example, a contact type IC card conforming to a standard such as ISO / IEC 7816 may be used as an external recording medium, and the card communication unit 28 is, for example, an IC card reader / writer. The card communication unit 28 is not limited to the case where data is read or written by connecting to the connection terminal 28a, but a coil antenna is provided instead of the connection terminal 28a, and data is read or written by wireless communication such as proximity communication. May be performed. In this case, for example, a non-contact type IC card conforming to a standard such as ISO / IEC 14443 (type A, type B) or ISO / IEC 18902 (NFC) may be used as the external recording medium.

  The RF communication unit 26 functions as an operation second communication unit that communicates operation signals and various data with the registered television receiver 1 by radio waves. The control unit 21 of the remote control device 2 transmits an operation signal from the RF communication unit 26 to the registered television receiver 1 based on the operation received by the operation unit 22 from the user. When the control unit 21 of the remote control device 2 transmits the data read by the card communication unit 28 from the external storage medium connected to the connection terminal 28 a to the registered television receiver 1 by the RF communication unit 26, Data is encrypted using the encryption key 134 stored in the storage unit 23 in association with the identification information of the machine 1.

  When the data received from the television receiver 1 by the RF communication unit 26 is encrypted and the identification information of the transmission source television receiver 1 is stored in the storage unit 23, the control unit 21 of the remote control device 2 The encryption key 134 stored in association with the identification information is read and decrypted using the encryption key 134. The control unit 21 transmits the operation signal from the RF communication unit 26 to the television receiver 1 without encrypting the operation signal according to the operation content received by the operation unit 22. As a result, the remote control device 2 remotely operates the television receiver 1.

  FIG. 3 is a chart showing a record layout example of the TV electronic certificate 130. The TV electronic certificate 130 is stored in the TV receiver 1 by the manufacturer of the TV receiver 1 at the time of shipment. The TV electronic certificate 130 is used for information about the TV receiver 1 and the TV receiver 1. The digital electronic signature 130 indicating that the TV electronic certificate 130 set in the above is valid is included. As for the format of the electronic certificate, a format such as X509 may be used. The example shown in FIG. 3 includes version information, serial number, signature algorithm, issuer information, expiration date, subject information, public key information, issuer unique identifier, subject unique identifier, extension area, and electronic signature. It is out. The version information indicates the version of the format of the TV electronic certificate 130, for example.

  The serial number is issued by the certificate authority for the TV electronic certificate 130. In this case, the manufacturer of the TV receiver 1 may issue the serial number. The signature algorithm indicates an encryption algorithm used for the electronic signature of the TV electronic certificate 130, and includes, for example, a hash algorithm (for example, SHA-1) and an encryption algorithm (for example, RSA). The issuer information represents the issuer of the TV electronic certificate 130. In this case, the issuer information may be the manufacturer of the television receiver 1. The expiration date represents the expiration date of the TV electronic certificate 130, and the target person information represents a target person who uses the electronic certificate. The public key information includes a television public key (not shown) used when decrypting using the public key cryptosystem and an identifier of the public key cryptosystem algorithm, and is determined for the television receiver 1 by a manufacturer or the like. Assigned. As a public key cryptosystem, a publicly known format such as RSA, DSA, or elliptic cryptosystem may be used. The TV public key included in the TV electronic certificate 130 has the same content as the TV public key 131 separately stored in the storage unit 13.

  The remote control electronic certificate 230 includes information on the remote control device 2, an electronic signature for indicating that the remote control electronic certificate 230 set for the remote control device 2 is valid, and the like. The remote control electronic certificate 230 is similar to the TV electronic certificate 130, for example, version information, serial number, issuer information, expiration date, subject information, public key information, issuer unique identifier, and subject unique identifier. The information regarding the remote control device 2 and the like, and an electronic signature are included. The public key information of the remote control electronic certificate 230 includes a remote control public key and an identifier of a public key cryptosystem algorithm. Next, an example of a method for signing the TV electronic certificate 130 will be described.

  FIG. 4 is an explanatory diagram for explaining an example of a digital certificate signing method. The arrows in the figure show an example of the order of each procedure of the title. For example, a data string such as a serial number and public key information is extracted from a pre-signature television digital certificate that does not include an electronic signature, and digest processing is performed to generate a digest from the extracted data string using a hash function. Next, an encryption process is performed to encrypt the digest using the manufacturer private key. Here, the manufacturer private key corresponds to the manufacturer public key 133 stored in the storage unit 13, and the data encrypted with the manufacturer private key can be decrypted with the manufacturer public key 133. is there. Then, an encrypted digest, that is, an electronic signature is included in the pre-signed television electronic certificate to generate a signed digital electronic certificate 130. For the remote control electronic certificate before signing, the remote control electronic certificate 230 after signing may be generated by the same procedure. Next, a registration process in which the television receiver 1 and the remote control device 2 register each other will be described.

  FIGS. 5 and 6 are flowcharts showing the procedure of the registration process, and FIGS. 7 and 8 are block diagrams showing information stored in the storage units 13 and 23 by the registration process. In the registration process, when the remote control device 2 is stored in the storage unit 10 of the television receiver 1 and the connection terminals 17 and 27 of the television receiver 1 and the remote control device 2 are connected, the television receiver 1 and the remote control device are connected. It is executed by the two control units 11 and 21. When the remote control device 2 is stored in the storage unit 10, a message notifying that the remote control device 2 is stored may be displayed on the display unit 12 c of the television receiver 1. The control unit 11 of the television receiver 1 outputs a certificate request from the connection terminal 17 to the connection terminal 27 of the remote control device 2 through the wired communication unit 14 (step S11).

  The control unit 21 of the remote control device 2 receives a request input from the connection terminal 17 of the television receiver 1 to the connection terminal 27 of the remote control device 2 (step S12). The control unit 21 determines whether or not the accepted request is a certificate request (step S13). When it is determined that the received request is not a certificate request (NO in step S13), the control unit 21 executes a registration failure process (step S30), and ends the registration process without registering the television receiver 1. The registration failure process executed by the remote control device 2 may be, for example, instructing the television receiver 1 to display on the display unit 12c a screen informing that the registration of the remote control device 2 has failed. In addition, a screen for notifying that registration of the remote control device 2 has failed may be displayed on a display unit provided in the remote control device 2.

  When the control unit 21 determines that the received request is a certificate request (YES in step S13), the control unit 21 reads the remote control electronic certificate 230 from the storage unit 23, and receives a television image from the connection terminal 27 by the wired communication unit 24. It outputs to the connection terminal 17 of the machine 1 (step S14). The control unit 11 of the television receiver 1 accepts the remote control electronic certificate 230 input from the connection terminal 27 of the remote control device 2 to the connection terminal 17 of the television receiver 1 by the wired communication unit 14 (step S15). After step S14, the control unit 21 of the remote control device 2 outputs a certificate request from the connection terminal 27 to the connection terminal 17 of the television receiver 1 through the wired communication unit 24 (step S16).

  The control unit 11 of the television receiver 1 receives a request input from the connection terminal 27 of the remote control device 2 to the connection terminal 17 of the television receiver 1 by the wired communication unit 14 (step S17). The control unit 11 determines whether or not the accepted request is a certificate request (step S18). If the control unit 11 determines that the received request is not a certificate request (NO in step S18), the control unit 11 executes a registration failure process (step S23), and ends the registration process without registering the remote controller 2. For example, the registration failure process executed by the control unit 11 may display a screen for notifying that the registration of the remote control device 2 has failed on the display unit 12c.

  If the control unit 11 determines that the received request is a certificate request (YES in step S18), the control unit 11 reads the TV electronic certificate 130 from the storage unit 13, and the wired communication unit 14 uses the remote control device from the connection terminal 17. 2 to the connection terminal 27 (step S19). The control unit 21 of the remote control device 2 receives the TV electronic certificate 130 input from the connection terminal 17 of the television receiver 1 to the connection terminal 27 of the remote control device 2 through the wired communication unit 24 (step S20). The control unit 21 verifies the electronic signature included in the TV electronic certificate 130 received from the TV receiver 1 (step S28).

  Here, an example of an electronic signature verification method by the control unit 21 will be described. Using the manufacturer public key 233 of the manufacturer set in the remote control device 2, the electronic signature included in the TV electronic certificate 130 is decrypted to obtain a digest. Next, a digest is obtained from data other than the electronic signature included in the TV electronic certificate 130 using a predetermined hash function, that is, a hash algorithm included in the signature algorithm of the TV electronic certificate 130. Then, when the digest obtained by decrypting the electronic signature matches the digest obtained from the data other than the electronic signature of the TV electronic certificate 130, it is determined that the content included in the TV electronic certificate 130 is valid. Good. The control unit 21 confirms the verification result or each data in the TV electronic certificate 130 and determines whether or not the TV receiver 1 that has output the TV electronic certificate 130 is a legitimate TV receiver 1 ( Step S29).

  If the control unit 21 determines that the television receiver 1 is not valid (NO in step S29), the control unit 21 moves the process to step S30 and ends the registration process without registering the television receiver 1. After step S19, the control unit 11 of the television receiver 1 verifies the electronic signature included in the remote control electronic certificate 230 received from the remote control device 2 (step S21). Here, an example of an electronic signature verification method by the control unit 11 will be given. Using the manufacturer public key 133 of the manufacturer set in the television receiver 1, the electronic signature included in the remote control electronic certificate 230 is decrypted to obtain a digest. Next, a digest is obtained from data other than the electronic signature included in the remote control electronic certificate 230 using a predetermined hash function, that is, a hash algorithm included in the signature algorithm of the remote control electronic certificate 230.

  Then, when each digest obtained by decrypting the electronic signature matches a digest obtained from data other than the electronic signature of the remote control electronic certificate 230, the contents included in the remote control electronic certificate 230 are valid. It is good to judge. The control unit 11 confirms the verification result or each data of the remote control electronic certificate 230 and determines whether or not the remote control device 2 that has output the remote control electronic certificate 230 is a valid remote control device 2 (step S22). . If the control unit 11 determines that the remote control device 2 is not valid (NO in step S22), the control unit 11 moves to step S23 and ends the registration process without registering the remote control device 2.

The above is the procedure in which the television receiver 1 and the remote control device 2 authenticate each other. When the authentication is completed, the encryption key 134 for encryption communication used when transmitting / receiving important data in wireless communication between the remote control device 2 and the television receiver 1 and the valid key set for the encryption key 134 are set. Exchange the deadline. Here, the exchange of the encryption key 134 means that the television receiver 1 and the remote control device 2 mutually store the encryption key 134 for use in encryption of communication between the television receiver 1 and the remote control device 2. In the following, an example in which a common key method is used as an encryption method between the television receiver 1 and the remote control device 2 is shown, but a public key encryption method may be used as the encryption method.
If the control unit 11 determines that the remote control device 2 is valid (YES in step S22), the remote control electronic certificate 230 is already stored in the storage unit 13 while being temporarily stored in the storage unit 13 or a RAM (not shown). It is determined whether or not the encryption key 134 that has been set is within the expiration date (step S24). If the control unit 11 determines that it is within the expiration date (YES in step S24), the control unit 11 ends the registration process without newly registering the remote control device 2.

  If the control unit 11 determines that it is not within the expiration date (NO in step S24), the control unit 11 generates the encryption key 134 (step S25). Here, the same encryption key 134 may be generated for the television receiver 1 and the remote control device 2 in order to encrypt communication between the television receiver 1 and the remote control device 2 using, for example, a common key cryptosystem. The expiration date may be set to be a predetermined period such as one week or one month from the date and time when the remote controller 2 is registered. The control unit 11 encrypts the expiration date together with the encryption key 134 generated in step S25 using the TV secret key 132, and connects the encryption information with the encryption key 134 and the expiration date encrypted by the wired communication unit 14. Output from the terminal 17 to the connection terminal 27 of the remote control device 2 (step S26).

The control unit 11 registers the remote control device 2 by storing the encryption key 134 in the storage unit 13 together with the expiration date in association with the remote control electronic certificate 230 of the remote control device 2 stored in the above process (step S27). The process ends.
On the other hand, if the control unit 21 of the remote control device 2 determines in step S29 that the television receiver 1 is not valid (YES in step S29), the encryption key 134 already stored in the storage unit 23 is within the expiration date. It is determined whether or not (step S31). If the control unit 21 determines that it is within the expiration date (YES in step S31), it ends the registration process without newly registering the television receiver 1. If the control unit 21 of the remote control device 2 determines in step S31 that the expiration date has not expired (NO in step S31), the television receiver 130 is temporarily stored in the storage unit 23 or the RAM (not shown) while the television electronic certificate 130 is temporarily stored. The encrypted information input from the output terminal 17 of the remote control device 2 to the connection terminal 27 of the remote control device 2 is received by the wired communication unit 24 and stored in the TV electronic certificate 130 of the television receiver 1 from the storage unit 23 by the above-described processing. Decryption is performed using the included TV public key (step S32). By decrypting the encrypted information, the encryption key 134 and the expiration date information of the encryption key 134 are obtained.

  The control unit 21 registers the television receiver 1 by associating the decrypted encryption key 134 and the expiration date with the television electronic certificate 130 of the television receiver 1 and storing them in the storage unit 23 (step S33). Exit. When the television receiver 1 and the remote control device 2 register each other by the registration process, a message notifying that registration has been performed may be displayed on the display unit 12c of the television receiver 1 or the display unit provided in the remote control device 2. The television receiver 1 and the remote control device 2 that have mutually registered and exchanged the encryption key 134 each communicate with the television receiver 1 and the remote control device 2 using the encryption key 134 stored in the storage units 13 and 23. Encryption and decryption.

  In the present embodiment, the case where the television receiver 1 and the remote control device 2 register each other is shown, but the present invention is not limited to this. One of the television receiver 1 and the remote control device 2 may register the other identification information. Although the encryption key 134 is generated by the television receiver 1, the encryption key 134 is not limited to this and may be generated by the remote control device 2. In this case, the encryption key 134 generated by the remote control device 2 may be transmitted to the television receiver 1. Communication between the television receiver 1 and the remote control device 2 is not limited to encryption using a common key encryption method, and a public key encryption method may be used. In this case, the TV secret key 132, the remote control secret key 232, the TV public key 131, and the remote control public key 231 stored in the TV receiver 1 and the remote control device 2 can be used.

  Each of the television receiver 1 and the remote control device 2 encrypts communication using the TV secret key 132 and the remote control secret key 232 set in advance, and receives the other-party TV electronic certificates 130 and 230 received as described above. Communication may be decrypted using the TV public keys 131 and 231 therein. When the public key method is used for communication between the television receiver 1 and the remote control device 2, it becomes more difficult to decrypt the encrypted communication, and it is possible to more effectively prevent leakage of communication contents. Further, when the common key cryptosystem is used for communication between the television receiver 1 and the remote control device 2, it is possible to reduce the processing load required for the encryption and decryption of the television receiver 1 and the remote control device 2, respectively. Become.

  In the present embodiment, when the remote control device 2 is stored in the storage unit 10 of the television receiver 1, the digital signature of the remote control electronic certificate 230 of the remote control device 2 is verified and determined to be a valid remote control device 2. In this case, the remote control device 2 is registered in the television receiver 1. As a result, the user can easily register the new remote control device 2 in the television receiver 1. When the communication between the television receiver 1 and the remote control device 2 is data, since it is encrypted using the encryption key 134, data leakage can be prevented according to the communication content.

  Further, when the communication between the television receiver 1 and the remote control device 2 is an operation signal, it is transmitted without being encrypted. Therefore, even if the remote control device 2 is not registered in the television receiver 1, The television receiver 1 can be remotely operated. Since the encryption key 134 is newly generated when the expiration date of the encryption key 134 has passed, the encryption key 134 can be easily updated by storing the remote control device 2 in the storage unit 10 of the television receiver 1. It becomes possible.

  In the present embodiment, an example is shown in which the encryption key 134 is updated when the expiration date of the encryption key 134 has expired while the remote control device 2 is stored in the storage unit 10 of the television receiver 1. It is not limited. For example, the encryption key 134 may be updated each time the remote control device 2 is stored in the storage unit 10. Further, when the remote controller 2 is stored in the storage unit 10, the encryption key 134 may be updated at a predetermined frequency such as once a day or once a week.

Embodiment 2
In the present embodiment, in contrast to the wired communication between the remote control device and the television receiver housed in the housing portion of the first embodiment via the connection terminal, the proximity communication is performed. FIG. 9 is a block diagram illustrating an example of internal hardware of the television receiver and the remote control device according to the second embodiment. A white arrow and a dashed white arrow in the figure indicate a wired connection and proximity communication performed between the television receiver and the remote control device, respectively. The television receiver 3 includes a proximity communication unit 34 that performs proximity communication with the remote control device 4 via the antenna unit 34a.

  Since other internal hardware of the television receiver 3 is the same as that of the television receiver 1 of the first embodiment, only the difference in reference numerals will be described. The television receiver 3 includes a storage unit 33, a reception unit 32a, a video / audio processing unit 32b, a display unit 32c, a control unit 31 that controls each internal hardware unit connected via the bus 31a, and proximity communication. Unit 34, power supply unit 35, RF communication unit 36, and connection terminal 37. In the storage unit 33, a TV electronic certificate 330, a TV public key 331 and a TV secret key 332, and a manufacturer public key 333 are stored in advance.

  The remote control device 4 includes a proximity communication unit 44 that performs proximity communication with the television receiver 3 via the antenna unit 44a. The antenna units 34a and 44a of the television receiver 3 and the remote control device 4 are capable of wireless communication when close to each other, for example, several centimeters or less. The antenna units 34a and 44a are, for example, an antenna coil using a radiated electromagnetic field generated by an induction loop or an antenna using an induction electric field. The proximity communication unit 44 functions as an operation-side first communication unit that communicates identification information of each of the television receiver 3 and the remote control device 4.

Since other internal hardware units of remote control device 4 are the same as those of remote control device 2 of the first embodiment, only the difference in reference numerals will be described. The remote control device 4 includes a control unit 41 that controls each internal hardware unit connected via the bus 41a, an operation unit 42, a storage unit 43, a battery 45, an RF communication unit 46, and connection terminals 47 and 48a. And a card communication unit 48. In the storage unit 43, a remote control electronic certificate 430, a remote control public key 431, a remote control private key 432, and a manufacturer public key 433 are stored in advance.

  10 and 11 are flowcharts showing the procedure of the registration process according to the second embodiment. In the registration process, when the remote control device 4 is stored in the storage unit of the television receiver 3 and the antenna units 34a and 44a of the television receiver 3 and the remote control device 4 are close to each other, the television receiver 3 and the remote control device 4 are respectively used. Are executed by the control units 31 and 41. The control unit 31 of the television receiver 3 transmits a certificate request from the antenna unit 34a of the television receiver 3 to the antenna unit 44a of the remote control device 4 through the proximity communication unit 34 (step S41). The control unit 41 of the remote control device 4 receives a request transmitted from the antenna unit 34a of the television receiver 3 to the antenna unit 44a of the remote control device 4 (step S42).

  The control unit 41 determines whether or not the received request is a certificate request (step S43). When it is determined that the received request is not a certificate request (NO in step S43), the control unit 41 executes a registration failure process (step S60), and ends the registration process without registering the television receiver 3. If the control unit 41 determines that the received request is a certificate request (YES in step S43), the control unit 41 reads the remote control electronic certificate 430 from the storage unit 43, and the proximity communication unit 44 receives the television image from the antenna unit 44a. It transmits to the antenna part 34a of the machine 3 (step S44).

  The control unit 31 of the television receiver 3 receives the remote control electronic certificate 430 transmitted from the antenna unit 44a of the remote control device 4 to the antenna unit 34a of the television receiver 3 by the proximity communication unit 34 (step S45). After step S44, the control unit 41 of the remote control device 4 transmits a certificate request from the antenna unit 44a to the antenna unit 34a of the television receiver 3 through the proximity communication unit 44 (step S46). The control unit 31 of the television receiver 3 receives the request transmitted from the antenna unit 44a of the remote control device 4 to the antenna unit 34a of the television receiver 3 by the proximity communication unit 34 (step S47). The control unit 31 determines whether or not the received request is a certificate request (step S48).

  When it is determined that the received request is not a certificate request (NO in step S48), the control unit 31 executes a registration failure process (step S53), and ends the registration process without registering the remote controller 4. When the control unit 31 determines that the received request is a certificate request (YES in step S48), the control unit 31 reads the TV electronic certificate 330 from the storage unit 33, and the proximity communication unit 34 uses the antenna of the TV receiver 3 to read out. Transmission from the unit 34a to the antenna unit 44a of the remote control device 4 (step S49).

  The control unit 41 of the remote control device 4 receives the television electronic certificate 330 transmitted from the antenna unit 34a of the television receiver 3 to the antenna unit 44a of the remote control device 4 by the proximity communication unit 44 (step S50). The control unit 41 verifies the electronic signature included in the TV electronic certificate 330 received from the TV receiver 3 (step S58). The control unit 41 determines whether or not the television receiver 3 that has transmitted the television electronic certificate 330 is a legitimate television receiver 3 from the verification result (step S59). If the control unit 41 determines that the television receiver 3 is not valid (NO in step S59), the control unit 41 proceeds to step S60 and ends the registration process without registering the television receiver 3.

  When determining that the television receiver 3 is a legitimate television receiver 3 (YES in step S59), the control unit 41 determines whether the encryption key associated with the television receiver 3 is within the expiration date (step S61). . If the control unit 41 determines that it is within the expiration date (YES in step S61), it ends the registration process without newly registering the television receiver 3. After step S49, the control unit 31 of the television receiver 3 verifies the electronic signature included in the remote control electronic certificate 430 received from the remote control device 4 (step S51). The control unit 31 determines from the verification result whether or not the remote control device 4 that has transmitted the remote control electronic certificate 430 is a valid remote control device 4 (step S52).

  If the control unit 31 determines that the remote control device 4 is not valid (NO in step S52), the control unit 31 executes a registration failure process (step S53), and ends the registration process without registering the remote control device 4. When determining that the remote control device 4 is valid (YES in step S52), the control unit 31 determines whether or not the encryption key associated with the remote control device 4 is within the expiration date (step S54). If the control unit 31 determines that it is within the expiration date (YES in step S54), the control unit 31 ends the registration process without newly registering the remote control device 4. If the control unit 31 determines that it is not within the expiration date (NO in step S54), the control unit 31 generates an encryption key together with the expiration date (step S55).

  The control unit 31 of the television receiver 3 encrypts the expiration date together with the encryption key generated in step S55 by using the TV secret key 332, and the encrypted information obtained by encrypting the encryption key and the TV secret key 332 is transmitted to the antenna unit. 34a is transmitted to the remote control device 4 (step S56). The control unit 31 registers the remote control device 4 by storing the encryption key in the storage unit 33 together with the expiration date in association with the remote control electronic certificate 430 stored in the above process (step S57), and ends the registration process. If the control unit 41 of the remote control device 4 determines that it is not within the expiration date in step S61 (NO in step S61), it has been transmitted from the television receiver 3, and the encrypted information is received by the antenna unit 44a. The encrypted information is decrypted using the television public key included in the television electronic certificate 330 received and stored from the receiver 3 (step S62). By decrypting the encrypted information, the encryption key and the expiration date information of the encryption key can be obtained. The control unit 41 registers the television receiver 3 by storing the decrypted encryption key and expiration date in the storage unit 43 in association with the television electronic certificate 330 (step S63), and ends the registration process.

  FIG. 12 is an explanatory diagram for explaining an example of an encryption key generation method. An example of a generation method will be described with respect to the generation of the encryption key executed in step S55 of the encryption key transmission process shown in FIG. The encryption key includes the device number (for example, 10 bytes) of the television receiver 3 included in the target person information of the TV electronic certificate 330 and the device number of the remote control device 4 included in the target person information of the remote control electronic certificate 430. (For example, 10 bytes) and, for example, an 8-byte random number generated by a random number generator (not shown) included in the control unit 31 are concatenated to generate a 28-byte data string (see FIG. 12A). Next, a 20-byte digest is generated for the generated data string using a hash function (see FIG. 12B).

  Then, data from the first byte to the seventh byte of the digest is extracted to generate an encryption key. Further, a 19-byte data string obtained by adding a 12-byte expiration date (for example, a data string indicating the year, month, day, hour and minute) is encrypted using the TV secret key 332 of the TV receiver 3. To do. (See FIG. 12C) The remote control device 4 receives the encrypted encryption information and decrypts it using the TV public key included in the TV electronic certificate 330 received from the TV receiver 3. The remote control device 4 stores the decrypted encryption key and the expiration date in the storage unit 43.

  In the present embodiment, the encryption key is generated by the television receiver 3, but the present invention is not limited to this, and the encryption key may be generated by the remote control device 4. In this case, the control unit 41 of the remote control device 4 may execute the encryption key transmission process, and the control unit 31 of the television receiver 3 may execute the encryption key reception process.

  In the present embodiment, when the television receiver 3 and the remote control device 4 stored in the storage unit perform proximity communication and register, a communication wave is intercepted by another communication device, and an electronic certificate or the like required for registration It is possible to prevent the risk of leakage. In addition, since the encrypted encryption key is transmitted and received between the television receiver 3 and the remote control device 4, it is possible to prevent leakage of the encryption key.

  The second embodiment is as described above, and the other parts are the same as those of the first embodiment. Therefore, the corresponding parts are denoted by the same reference numerals and processing names, and detailed description thereof is omitted.

1, 3 Television receiver 2, 4 Remote control device 11, 21, 31, 41 Control unit 11a, 21a, 31a, 41a Bus 12a, 32a Reception unit 12b, 32b Video / audio processing unit 12c, 32c Display unit 13, 23, 33 , 43 Storage unit 14, 24 Wired communication unit 15, 35 Power supply unit 16, 36 RF communication unit 17, 27, 37, 47, 28a, 48a Connection terminal 22, 42 Operation unit 25, 45 Battery 28, 48 Card communication unit 34 , 44 Proximity communication unit 34a, 44a Antenna unit 48 Card communication unit 130, 330 TV electronic certificate 230, 430 Remote control electronic certificate 131, 331 TV public key 231, 431 Remote control public key 133, 233, 333, 433 Key 132, 332 TV secret key 134 Encryption key 232, 432 Remote control secret key

Claims (15)

In a communication device including a storage unit that can store other communication devices,
A first communication unit that communicates with other communication devices stored in the storage unit;
An authentication unit for authenticating another communication device stored in the storage unit based on identification information of the other communication device received by the first communication unit;
A registration unit for registering identification information of another communication device communicated by the first communication unit , when authenticating by the authentication unit as a valid communication device ;
A second communication unit that communicates with another communication device that has registered identification information by the registration unit ;
A generator for generating an encryption key;
With
The first communication unit is configured to transmit the encryption key generated by the generation unit to another communication device authenticated by the authentication unit;
The registration unit is configured to register the identification information of the other communication device in association with the encryption key generated by the generation unit;
The second communication unit communicates with another communication device corresponding to the identification information using an encryption key associated with the identification information.
Communication and wherein the.   The encryption key is associated with the expiration date of the encryption key,
  Means for determining whether or not a registered encryption key is within the validity period;
  The generator is
  If the registered encryption key is not within the expiration date, another encryption key is generated.
  The communication apparatus according to claim 1.   In a communication device including a storage unit that can store other communication devices,
  A first communication unit that communicates with other communication devices stored in the storage unit;
  An authentication unit for authenticating another communication device stored in the storage unit based on identification information of the other communication device received by the first communication unit;
  A registration unit for registering identification information of another communication device communicated by the first communication unit, when authenticating by the authentication unit as a valid communication device;
  A second communication unit that communicates with another communication device that has registered the identification information by the registration unit;
  With
  The first communication unit receives an encryption key from another communication device authenticated by the authentication unit,
  The registration unit registers the identification information of the other communication device in association with the encryption key received by the first communication unit;
  The second communication unit communicates with another communication device corresponding to the identification information using an encryption key associated with the identification information.
  A communication device.   The encryption key is associated with the expiration date of the encryption key,
  Means for determining whether or not a registered encryption key is within the validity period;
  The registration unit
  If the registered encryption key is not within the expiration date, the identification information of the other communication device stored in the storage unit is registered in association with the other encryption key received by the first communication unit.
  The communication apparatus according to claim 3.   A storage unit for storing the manufacturer public key;
  The identification information is a remote control electronic certificate including an electronic signature encrypted with a manufacturer private key,
  The authentication unit
  By decrypting the electronic signature included in the identification information received by the first communication unit using the manufacturer public key stored in the storage unit, the other communication device stored in the storage unit is authenticated. It is characterized by being
  The communication apparatus according to any one of claims 1 to 4. The first communication unit may include a connection terminal provided on the housing part, from claim 1, characterized in that you have to communicate with another communication device connected via the connecting terminal The communication device according to claim 5 . The first communication unit, a communication device according to any one of claims 1, characterized in that you have to be wireless communication to claim 5. The second communication unit includes a determination unit that determines whether to use an encryption key according to communication contents,
The second communication unit, when it is determined that use of the encryption key by the determination unit, to any one of claims 1, characterized in that you have to communicate with the encryption key to claim 7 The communication device described. A communication device according to any one of claims 1 to 8 ,
A receiver for receiving TV broadcasts,
The television receiver, wherein the second communication unit is remotely operated by another communication device with which the second communication unit communicates. In a communication system including a first communication device and a second communication device having a storage unit capable of storing the first communication device,
The first communication device is:
A first communication unit that communicates with a second communication device stored in the storage unit;
An authentication unit for authenticating the second communication device stored in the storage unit based on the identification information of the second communication device received by the first communication unit;
A registration unit that registers identification information of the second communication device communicated by the first communication unit when the authentication unit authenticates the communication device as a legitimate communication device ;
A second communication unit that communicates with the second communication device that has registered the identification information by the registration unit, and
The second communication device is:
A third communication unit communicating with the first communication unit;
A fourth communication unit that communicates with the second communication unit ,
The first communication device is:
A generator for generating an encryption key;
The first communication unit is configured to transmit the encryption key generated by the generation unit to the second communication device authenticated by the authentication unit;
The registration unit registers the identification information of the second communication device in association with the encryption key generated by the generation unit;
The communication system, wherein the second communication unit communicates with a second communication device corresponding to the identification information by using an encryption key associated with the identification information .   In a communication system including a first communication device and a second communication device having a storage unit capable of storing the first communication device,
  The first communication device is:
  A first communication unit that communicates with a second communication device stored in the storage unit;
  An authentication unit for authenticating the second communication device stored in the storage unit based on the identification information of the second communication device received by the first communication unit;
A registration unit that registers identification information of the second communication device communicated by the first communication unit when the authentication unit authenticates the communication device as a legitimate communication device;
  A second communication unit that communicates with the second communication device that has registered the identification information by the registration unit;
  With
  The second communication device is:
  A third communication unit communicating with the first communication unit;
  A fourth communication unit communicating with the second communication unit;
  With
  The first communication unit is configured to receive an encryption key from the second communication device authenticated by the authentication unit,
  The registration unit registers the identification information of the second communication device in association with the encryption key received by the first communication unit;
  The second communication unit communicates with a second communication device corresponding to the identification information using an encryption key associated with the identification information.
  A communication system characterized by the above. In a television receiving system including a television receiving device and a remote control device for remotely operating the television receiving device,
The television receiver is
A storage section for storing the remote control device;
A television-side first communication unit that communicates with a remote control device stored in the storage unit;
An authentication unit for authenticating the remote control device stored in the storage unit based on the identification information of the remote control device received by the television side first communication unit;
A registration unit for registering identification information of the remote operation device communicated by the first communication unit on the television side when the authentication unit authenticates that the remote operation device is valid ;
A second communication unit on the TV side that communicates with the remote control device registered by the registration unit,
The remote control device is:
An operation-side first communication unit that communicates with the television-side first communication unit;
An operation-side second communication unit that communicates with the television-side second communication unit ,
The television receiver includes a generation unit that generates an encryption key,
The television side first communication unit is configured to transmit the encryption key generated by the generation unit to the remote operation device authenticated by the authentication unit,
The registration unit is configured to register the identification information of the remote control device in association with the encryption key generated by the generation unit,
The second communication unit on the television side communicates with a remote control device corresponding to the identification information using an encryption key associated with the identification information,
The operation side first communication unit is configured to receive the encryption key transmitted from the television side first communication unit,
The television receiving system according to claim 1, wherein the second communication unit on the operation side communicates using the encryption key received by the first communication unit on the operation side .   In a television receiving system including a television receiving device and a remote control device for remotely operating the television receiving device,
  The television receiver is
  A storage section for storing the remote control device;
  A television-side first communication unit that communicates with a remote control device stored in the storage unit;
  An authentication unit for authenticating the remote control device stored in the storage unit based on the identification information of the remote control device received by the television side first communication unit;
  If the authentication unit authenticates that the remote operation device is valid, a registration unit that registers the remote operation device communicated by the first television communication unit;
  A second television communication unit that communicates with the remote control device registered by the registration unit;
  With
  The remote control device is:
  An operation-side first communication unit that communicates with the television-side first communication unit;
  An operation-side second communication unit that communicates with the television-side second communication unit;
  With
  The remote control device includes a generation unit that generates an encryption key,
  The operation side first communication unit is configured to transmit the encryption key generated by the generation unit to the television receiver,
  The operation side second communication unit is configured to communicate using the encryption key generated by the generation unit,
  The television side first communication unit is configured to receive an encryption key from the remote control device authenticated by the authentication unit,
  The registration unit is configured to register the identification information of the remote control device in association with the encryption key received by the television side first communication unit,
  The television-side second communication unit communicates with a remote control device corresponding to the identification information using an encryption key associated with the identification information.
  A television receiver system. In a registration method for registering the other communication device in a communication device having a storage unit in which the other communication device can be stored.
Storing the other communication device,
Communicating between the other communication device and the communication device stored,
The communication device authenticates the other communication device stored in the storage unit based on the identification information of the other communication device that has communicated,
When authenticating that it is a legitimate communication device, the communication device generates an encryption key,
The communication device transmits the generated encryption key to another authenticated communication device,
A registration method, wherein the communication device registers identification information of the other communication device in association with the generated encryption key .   In a registration method for registering the other communication device in a communication device having a storage unit in which the other communication device can be stored.
  Storing the other communication device,
  Communicating between the other communication device and the communication device stored,
  The communication device authenticates the other communication device stored in the storage unit based on the identification information of the other communication device that has communicated,
  When the communication device authenticates that it is a legitimate communication device, it receives an encryption key from another authenticated communication device,
  The communication device registers identification information of the other communication device in association with the received encryption key.
  A registration method characterized by that.

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