KR101680661B1 - Method for inputting a data of digital broadcasting receiver and digital broadcasting system thereof - Google Patents

Abstract

A data input method of a digital broadcast receiver and a digital broadcasting system therefor according to an embodiment of the present invention are disclosed. Specifically, a data input method of a digital broadcasting receiver and a digital broadcasting system therefor that can prevent data or commands received by a digital broadcasting receiver from being leaked to the outside are disclosed.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a digital broadcasting receiver, and more particularly,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data input method of a digital broadcasting receiver and a digital broadcasting system therefor, and more particularly to a data input method of a digital broadcasting receiver, which can prevent data or commands, And a digital broadcasting system therefor.

Since digital broadcasting transmits digital video and audio signals, it is stronger against external noise than analog broadcasting, has less data loss, and is advantageous for error correction. In addition, the digital broadcasting has a high resolution and provides a clear screen, and it can provide a user-oriented interactive service. Accordingly, the use of digital broadcasting has been widely used, and a digital broadcasting receiver or a digital broadcasting system capable of receiving and displaying digital broadcasting has been increasingly used.

In the case of digital broadcasting, channels and functions provided to users are increasing exponentially. For example, home shopping through digital broadcasting is widely used, so that personal information input for a home shopping or cost confirmation is also performed through a digital broadcasting receiver for displaying the home shopping channel. In addition, video on demand (VOD) services are provided through digital broadcasts, and approval for use of video-on-demand services or payment of fees is made through digital broadcast receivers.

In order to control such a digital broadcast receiver, a remote control device is used. Inputting of personal information necessary for the above-mentioned home shopping, payment approval, approval of use of a video-on-demand service, or payment of a fee can be accomplished through a remote control device.

There is a risk that data transmitted and received between the remote control device and the digital broadcasting receiver is leaked when an operation requiring security is performed such as input of personal information, approval of use, or payment of expense, through the remote control device.

Accordingly, there is a need to protect data transmitted and received between the remote control device and the digital broadcast receiver.

An object of the present invention is to provide a data input method of a digital broadcast receiver capable of preventing data or commands received by a digital broadcast receiver from being leaked to the outside, and a digital broadcast system therefor.

According to another aspect of the present invention, there is provided a digital broadcasting receiver comprising: a data input / output unit for transmitting and receiving data between a digital broadcasting receiver and a remote control device, And a digital broadcasting system according to the method.

According to another aspect of the present invention, there is provided a data input method of a digital broadcast receiver, including: storing a private key in a storage unit of a digital broadcast receiver; Receiving an encrypted data signal encrypted with a public key; Decrypting the encrypted data signal with the private key; And receiving the decoded data signal and performing a corresponding command or request.

Here, the private key may be a decryption key for decrypting the encrypted data signal.

Also, the private key may be a decryption key corresponding to a unique product number of the digital broadcasting receiver.

According to another aspect of the present invention, there is provided a method of inputting data in a digital broadcasting receiver, the method comprising: generating encrypted data signals by encrypting transmission request data, which is data to be transmitted, using the public key; And transmitting the encrypted data signal.

The public key may be an encryption key corresponding to the private key.

[2] The method of claim 2, wherein the step of generating the encrypted data signal comprises encrypting the transmission request data using the public key by a remote control device for remotely controlling the digital broadcasting receiver.

The data input method of the digital broadcast receiver according to the present invention may further include determining whether to generate the encrypted data signal.

The data input method of the digital broadcast receiver according to the present invention may further comprise setting target data to be encrypted.

In addition, the step of determining whether to generate the encrypted data signal may include determining whether the transmission request data corresponds to the target data, and encrypting the transmission request data if determined.

The step of determining whether to generate the encrypted data signal may include transmitting the transmission request data to the digital broadcasting receiver if the transmission request data is not the target data. And receiving the transmission request data and performing a command or a request corresponding to the operation according to the transmission request data.

The data input method of the digital broadcast receiver according to the present invention may further comprise setting a security mode of the remote control device.

The step of transmitting the encrypted data signal may include wirelessly transmitting the encrypted data signal to the digital broadcast receiver.

According to an embodiment of the present invention, there is provided a digital broadcasting system including a remote controller and a digital broadcasting receiver, the digital broadcasting receiver comprising: a receiving interface for receiving an encrypted data signal encrypted with a public key; A first controller for receiving the encrypted data signal, decrypting the encrypted data signal using a private key, and performing a command or a request corresponding to the decrypted data signal; And a storage unit for storing the private key.

Here, the private key may be a decryption key for decrypting the encrypted data signal.

Also, the private key may be a decryption key corresponding to a unique product number of the digital broadcasting receiver.

The remote control device may further include: an encryption unit encrypting transmission request data, which is data to be transmitted, using the public key to generate the encrypted data signal; And a transmission interface unit transmitting the encrypted data signal to the digital broadcasting receiver. Here, the public key may be an encryption key corresponding to the private key.

The encryption unit may include a public key storage unit storing the public key; And an encryption engine that generates the encrypted data signal using the public key.

The remote control apparatus may further include a second controller for determining whether to perform the encryption and controlling the encryption data signal to be generated when the remote controller determines to perform the encryption.

In addition, the second control unit can set the target data to be encrypted.

The second controller may determine whether the transmission request data corresponds to the target data, and may control the transmission request data to be encrypted when it is determined that the transmission request data corresponds to the target data.

The second control unit may determine whether the transmission request data corresponds to the target data, and may control the transmission request data to be transmitted when it is determined that the transmission request data does not correspond to the target data. Here, the reception interface transmits the transmission request data to the first controller, and the first controller receives the transmission request data and controls the controller to perform a command or a request corresponding to the operation according to the transmission request data .

Also, the transmission interface unit may wirelessly transmit the encrypted data signal to the digital broadcast receiver.

The data input method and the digital broadcasting system of the digital broadcasting receiver according to the embodiment of the present invention can prevent the data or command received by the digital broadcasting receiver from being leaked to the outside.

In addition, the data input method and the digital broadcasting system of the digital broadcasting receiver according to an embodiment of the present invention can prevent the data transmitted / received from being hacked in data transmission / reception between the digital broadcasting receiver and the remote control device. Accordingly, the security of the digital broadcasting receiver and the digital broadcasting system including the digital broadcasting receiver can be enhanced.

1 is a diagram illustrating a digital broadcasting system according to an embodiment of the present invention.
2 is a detailed block diagram of the digital broadcast receiver of FIG.
FIG. 3 is a block diagram illustrating the remote control apparatus of FIG. 1 in detail.
4 is a detailed diagram of a digital broadcasting system according to an embodiment of the present invention.
5 is a flowchart illustrating a data input method of a digital broadcast receiver according to an embodiment of the present invention.
FIG. 6 is a flowchart illustrating a data input method of the digital broadcast receiver of FIG. 5 in detail.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. The configuration and operation of the present invention shown in the drawings and described by the drawings are described as at least one embodiment, and the technical idea of the present invention and its core configuration and operation are not limited thereby.

Although the terms used in the present invention have been selected in consideration of the functions of the present invention, it is possible to use general terms that are currently widely used, but this may vary depending on the intention or custom of a person skilled in the art or the emergence of new technology. Also, in certain cases, there may be a term selected arbitrarily by the applicant, in which case the meaning thereof will be described in detail in the description of the corresponding invention. Therefore, it is to be understood that the term used in the present invention should be defined based on the meaning of the term rather than the name of the term, and on the contents of the present invention throughout.

1 is a diagram illustrating a digital broadcasting system according to an embodiment of the present invention.

A digital broadcasting system according to an embodiment of the present invention includes a digital broadcasting receiver 100 and a remote controller 200.

The digital broadcast receiver 100 receives a signal of a predetermined frequency band received through a digital broadcast channel and displays an image screen corresponding to the received signal. The image screen corresponding to the received signal is displayed on the display panel 105. [

The remote control device 200 is a means for controlling the digital broadcast receiver 100, and controls the digital broadcast receiver 100 remotely. Specifically, data input or a predetermined operation command is inputted from the user through the data input button 211 or the operation button 213 or the like. In response to the data input or the predetermined operation command request, the signal corresponding to the data input or the predetermined operation command request is transmitted to the digital broadcast receiver 100.

The digital broadcast receiver 100 receives a home shopping channel, a VOD service channel, etc., and displays a personal information input screen, a cost confirmation screen, a service use approval screen, and the like necessary for using a home shopping or an on-demand video service on the display panel 105 Display.

When a personal information input screen, a cost confirmation screen or a service use approval screen is displayed on the display panel 105, the user can input personal information Or inputting data necessary for cost approval or approval of use of a predetermined service.

Hereinafter, with reference to FIG. 2 to FIG. 4, it is assumed that the digital broadcasting receiver prevents data or commands (for example, personal information data, or data necessary for approval of use of a fee or a predetermined service) A digital broadcasting system including a digital broadcasting receiver and a digital broadcasting receiver according to an embodiment of the present invention will be described in detail.

2 is a detailed block diagram of the digital broadcast receiver of FIG.

For example, the blocks shown in FIG. 2 can be designed as a module, which means a unit for processing a specific function or operation. The module may be implemented by hardware or software, or may be implemented by a combination of hardware and software.

2, a digital broadcasting receiver 100 according to an exemplary embodiment of the present invention includes a video / audio processing unit 101, an interface unit 150, a storage unit 160, a display unit 170, A controller 175, and a controller 180, and the like.

The video / audio processing unit 101 processes the inputted video signal or audio signal so that the video or audio can be outputted to the display unit 170 and the audio output unit 175 of the video display device 100. [ For this, the video / audio processing unit 101 may include a signal input unit 110, a demodulation unit 120, and a signal processing unit 140.

The signal input unit 110 to which the video / audio signal is input includes a tuner unit 111, an A / V input unit 112, a USB input unit 11, a wireless signal input unit 114, a network connection unit (not shown) And the like. When the received signal is a radio frequency (RF) signal having a specific frequency band, the signal input unit 110 can convert it into an intermediate frequency (IF) signal and output the converted signal.

The demodulation unit 120 restores a signal transmitted from the signal input unit 110 to a signal at the time of transmission at a broadcasting station or the like, and outputs the signal. That is, the demodulator 120 demodulates the input signal and outputs the demodulated signal.

The signal processing unit 140 performs signal processing such as error correction and signal quality improvement on the signal transmitted from the demodulation unit 120 and outputs the signal.

The display unit 170 displays a video screen corresponding to the video signal output from the video / audio processing unit 101 on a display panel (105 in FIG. 1) provided internally.

The audio output unit 175 receives the audio signal output from the video / audio processing unit 101 and converts the received audio signal into a physical vibration signal so that the user can listen to the audio signal.

The interface unit 150 receives the signal transmitted from the remote control device 200 and transmits the received signal to the control unit 180. Specifically, the interface unit 150 transmits the received signal to the control unit 180 so that an operation and a request according to the signal transmitted from the remote control device 200 can be performed. The interface unit 150 will be described in detail with reference to FIG.

The storage unit 160 stores predetermined data in response to a storage command of the controller 180. [ In addition, the data transmitted from the video / audio processing unit 101 can be stored under the control of the control unit 180. In addition, the storage unit 160 may store a private key. The private key is described in detail with reference to FIG. 4 below.

The user input unit 155 may comprise a keypad or a button. Also, in response to a request of the user according to the operation of the keypad or the button, the user request item is transmitted to the control unit 180 so that the user can perform the requested item. For example, when a user requests a broadcast channel change, the user receives the change request and transmits a channel change request to the controller 180. Then, the control unit 180 performs channel change.

The controller 180 controls overall operations and commands for displaying an image screen of the image display apparatus 100. The control unit 180 will be described in detail with reference to FIG.

FIG. 3 is a block diagram illustrating the remote control apparatus of FIG. 1 in detail.

3, the remote control apparatus 200 includes an interface unit 220, a user input unit 230, an encryption unit 240, an output unit 250, a power supply unit 260, a storage unit 270, , And a control unit 280. [

The remote control apparatus 200 transmits a command on power on / off, channel change, volume change, and the like to the digital broadcast receiver 100 through the interface unit 220. In addition, it is possible to transmit data necessary for inputting the above-mentioned personal information, approving use of a predetermined service, expense settlement, and the like. Here, power on / off, channel change, volume change, and the like can be requested from the user through the operation button 213. In addition, data necessary for inputting personal information, approval of use of a predetermined service, cost approval, etc., can be input from the user through the data input button 211.

The interface unit 220 transmits / receives a signal to / from the digital broadcasting receiver 100. According to an embodiment of the present invention, the remote control apparatus 200 may include a radio frequency (RF) module 221 capable of transmitting and receiving signals with the interface unit 150 of the digital broadcast receiver 100 according to the RF communication standard Respectively. The remote control apparatus 200 may also include an IR module 223 capable of transmitting and receiving signals to and from the interface unit 150 of the digital broadcast receiver 100 in accordance with an infra-red (IR) communication standard.

The user input unit 230 may include a data input button 211 or an operation button 213. The user can input commands or data related to the digital broadcasting receiver 100 to the remote control device 200 by operating the user input unit 230. [

When the user input unit 230 has a hard key button, the user can input a command or data related to the digital broadcast receiver 100 to the remote control device 200 through a push operation of the hard key button have. When the user input unit 230 includes a touch screen, the user may touch a soft key of the touch screen to input a command related to the digital broadcast receiver 100 to the remote control apparatus 200. [ The user input unit 230 may include various types of input means such as a scroll key, a jog dial, and the like that can be operated by the user.

The encryption unit 240 encrypts transmission request data, which is data to be transmitted by the remote control apparatus, using a public key to generate encrypted data. The encryption unit 240 will be described in detail with reference to FIG.

The output unit 250 may output an image or sound signal corresponding to the operation of the user input unit 230 or corresponding to the signal transmitted from the image display apparatus 100. [ The user can recognize whether the user input unit 230 is operated or whether the digital broadcasting receiver 100 is controlled through the output unit 250.

The output unit 250 may include an LED module 251 that is turned on when a user input unit 230 is operated or a signal is transmitted to and received from the digital broadcast receiver 100 through the interface unit 220, A vibration module 253 for generating vibration, an acoustic output module 255 for outputting sound, or a display module 257 for outputting an image.

The power supply unit 260 supplies power to the remote control device 200. The power supply unit 260 can reduce the power waste by interrupting the power supply when the remote controller 200 does not move for a predetermined period of time. The power supply unit 260 can resume power supply when a predetermined key provided in the remote control device 200 is operated.

The storage unit 270 may store various kinds of programs, application data, and the like necessary for the control or operation of the remote control apparatus 200. [ In addition, the storage unit 270 may store a public key required for encryption.

For example, when the remote control apparatus 200 wirelessly transmits / receives a signal through the digital broadcasting receiver 100 and the RF module 221, the remote control apparatus 200 and the digital broadcasting receiver 100 transmit / Lt; / RTI > The control unit 280 of the remote control device 200 transmits information about a frequency band or the like capable of wirelessly transmitting and receiving signals to and from the digital broadcast receiver 100 that is paired with the remote control device 200, ), And can refer to it.

The control unit 280 controls various matters related to the control of the remote control device 200. The control unit 280 transmits a signal corresponding to a predetermined key operation of the user input unit 230 or a signal corresponding to data input through the user input unit 230 To the interface unit 150 of the digital broadcast receiver 100.

The interface unit 150 of the digital broadcast receiver 100 may include an RF module 152 or an IF module 153 that can transmit and receive signals wirelessly with the remote control device 200. [

The interface unit 150 can wirelessly transmit and receive signals to and from the remote control device 200 through the RF module 152. Also, the remote control device 200 can receive a signal transmitted through the IR module 153 according to the IR communication standard.

According to an embodiment of the present invention, the remote control apparatus 200 can generate encrypted data and transmit the encrypted data to the digital broadcasting receiver 100. Also, the digital broadcast receiver 100 can receive the encrypted data and decode the encrypted data. The generation and transmission of the encrypted data of the remote control apparatus 200 and the reception and decryption of the encrypted data of the digital broadcast receiver 100 will be described in detail with reference to FIG.

4 is a detailed diagram of a digital broadcasting system according to an embodiment of the present invention.

3 and 4, the encryption unit 240 encrypts transmission request data using a public key to generate an encrypted data signal. The transmission request data is a signal corresponding to a predetermined key operation of the user input unit 230 or a signal corresponding to data input through the user input unit 230. [

The encryption unit 240 may include a public key storage unit 441 and an encryption engine 443. [

The public key storage unit 441 stores a public key used for generating the above-described encrypted data signal. The public key 441 may be stored in the storage unit 270 described above.

The encryption engine 443 reads the public key stored in the public key storage unit 441 or the storage unit 270, and uses the public key to encrypt the transmission request data to generate an encrypted data signal.

The interface unit 220 converts the encrypted data signal generated by the encryption unit 240 into an IR signal or an RF signal according to the IR communication standard or the RF communication standard and transmits the IR signal or the RF signal to the digital broadcasting receiver 100. That is, the interface unit 220 converts the encrypted data signal into a wireless signal (IR signal or RF signal) and transmits the converted signal.

In addition, the control unit 280 of the remote control device 200 may determine whether to perform encryption, and may control the encryption unit 240 to perform encryption according to the determination. Then, in accordance with the control of the control unit 280, the encryption unit 240 encrypts the transmission request data only when the control unit 280 decides to perform the encryption operation, thereby generating the encrypted data signal.

Specifically, the control unit 280 can determine the target data to be encrypted. The control unit 280 determines transmission target data to be transmitted or received between the remote control device 200 and the digital broadcasting receiver 100 as target data to be prevented from being leaked or hacked, Can be stored.

For example, the control unit 280 may set data necessary for inputting the above-mentioned personal information, approval of use of a predetermined service, expense settlement, or the like, which is data requiring a need to prevent the outflow of a data signal.

The target data setting of the control unit 280 may be performed by the user or automatically set by software.

Accordingly, the control unit 280 determines whether the transmission request data corresponds to the target data, and controls the encryption unit 240 to encrypt the transmission request data if it is determined that the transmission request data corresponds to the target data.

If the control unit 280 determines that the transmission request data does not correspond to the object data, the transmission request data is transmitted to the digital broadcasting receiver 100 through the interface unit 220 without encryption.

That is, if the control unit 280 determines that the transmission request data does not correspond to the object data, the interface unit 220 transmits the transmission request data that has not been encrypted to the digital broadcasting receiver 100. The interface unit 150 receives the transmission request data that has not been encrypted and transmits the transmission request data to the controller 180. Then, the control unit 180 receives the transmission request data and causes a command or request corresponding to the transmission request data to be performed.

Further, the remote control device 200 can determine to set the security mode in transmitting and receiving signals in the remote control device 200. [ The security mode setting may be performed by a user. In addition, the security mode setting can be automatically performed by software setting if the security is to be maintained, such as inputting personal information, paying a fee for the home shopping, approving the use of the video-on-demand service,

The configuration and operation of the digital broadcast receiver 100 when the encrypted data signal encrypted with the transmission request data is transmitted from the remote control device 200 and received by the interface unit 150 will be described below.

Referring to FIG. 4, the interface unit 150 receives an encrypted data signal according to an IR signal standard or an RF communication standard. That is, the encrypted data signal can be received as a wireless signal (IR signal or RF signal).

Specifically, the encrypted data signal is a signal obtained by encrypting the transmission request data using the public key in the encryption unit 240, transmitted from the remote control device 200 in the form of an IR signal or an RF signal, Lt; / RTI >

The control unit 180 receives the encrypted data signal and decrypts the encrypted data signal using a private key to generate a decrypted data signal. Then, it executes a command or a request corresponding to the decoded data signal. For example, when the decoded data signal is the personal information data requested to be input upon payment of a predetermined service use payment, the control unit 180 receives the personal information data and further transmits the received personal information data to a predetermined service providing broadcasting station or server Can be performed. Also, the decryption operation of the control unit 180 may be performed in the decryption engine 480 provided outside the control unit 180 or internally. 4 illustrates an example in which the decryption engine 480 is provided inside the control unit 180. In FIG.

Here, the private key may be a decryption key corresponding to a unique serial number (for example, a serial number) of the digital broadcasting receiver 100. That is, the private key may be set or generated to have different values for different digital broadcasting receivers 100, and stored in the storage unit 160. Also, it can be stored in the private key storage unit 460, which is a separate storage space provided internally or externally of the storage unit 160. 4 illustrates an example in which the private key storage unit 460 is provided inside the storage unit 160. FIG.

When the remote control apparatus 200 transmits the transmission request data that is not encrypted, the digital broadcasting receiver 100 receives the transmission request data that is not encrypted and controls the transmission of the command or the request corresponding to the transmission request data.

The digital broadcasting system according to an exemplary embodiment of the present invention encrypts transmission request data requested to be transmitted through the remote controller 200 and transmits the encrypted transmission request data to the digital broadcasting receiver 100, It is possible to prevent leakage to the outside. Accordingly, it is possible to prevent the data transmitted / received between the digital broadcast receiver and the remote control device from being hacked. In addition, the security of the digital broadcasting system can be increased.

5 is a flowchart illustrating a data input method of a digital broadcast receiver according to an embodiment of the present invention.

Referring to FIG. 5, a data input method of a digital broadcast receiver according to an embodiment of the present invention encrypts transmission request data using a public key (operation 510). Step 510 may be performed by the encryption unit 240 of the remote control device 200.

In addition, it may further include a step of setting a security mode of the remote control device 200 before step 510 (not shown). Accordingly, if the security mode is set, the operation proceeds to step 510.

The encrypted data signal is transmitted in step 510 (step 515). Step 515 may be performed in the interface unit 220 of the remote control device 200. Further, the encrypted data signal may be transmitted as a radio signal (IR signal or RF signal).

The encrypted data transmitted in step 515 is received (step 520). The step 520 may be performed in the interface unit 150 of the digital broadcast receiver 100.

In operation 525, the encrypted data signal received in operation 520 is decrypted using the private key to generate a decrypted data signal. Step 525 may be performed in the control unit 180 or the decryption engine 480 provided internally or externally of the control unit 180.

And performs an operation according to a request or command corresponding to the decoded data signal (operation 530). Specifically, if the decoded data signal requests data input, the decoded data signal is input to the control unit 180, and if the decoded data signal requests the execution of a predetermined command, the corresponding operation is performed. The operation of step 530 may be performed in the controller 180.

The data input method of the digital broadcasting receiver according to the embodiment of the present invention illustrated in FIG. 5 is the same as that of the digital broadcasting system according to the embodiment of the present invention described above with reference to FIGS. 1 to 4, The description will be omitted.

FIG. 6 is a flowchart illustrating a data input method of the digital broadcast receiver of FIG. 5 in detail.

Referring to FIG. 6, a data input method of a digital broadcast receiver according to an embodiment of the present invention may further include steps 610, 615, 620, 625, and 630 in comparison with FIG. The configurations of steps 635, 640, 645, 650, and 655 of FIG. 6 are the same as those of steps 510, 515, 520, 525, and 530 of FIG. 5, and detailed descriptions thereof are omitted.

Referring to FIG. 6, a data input method of a digital broadcast receiver according to an embodiment of the present invention sets target data to be encrypted (operation 610).

The data corresponding to the operation of the data input button 211 or the operation button 213 of the remote control device 200 is input in step 615. [ The data input in step 615 becomes the above-described transmission request data.

In operation 620, it is determined whether encryption is to be performed on the transmission request data received in operation 615. In step 620, it is determined whether the transmission request data input in step 615 corresponds to the target data set in step 610. The operation of step 620 may be performed by the control unit 280 of the remote control device 200.

If the transmission request data corresponds to the target data, the transmission request data is encrypted using the public key (Step 635).

If it is determined in step 620 that the encryption is not to be performed, the transmission request data, which is input data, is transmitted to the digital broadcasting receiver 100 without being encrypted (step 625). Step 625 may be performed in the interface unit 220 of the remote control device 200.

The transmission request data transmitted in step 625 is received (step 630). Step 630 may be performed in the interface unit 150 of the digital broadcasting receiver 100.

The data input method of the digital broadcast receiver according to the embodiment of the present invention illustrated in FIG. 6 is the same as that of the digital broadcast system according to the embodiment of the present invention described above with reference to FIGS. 1 to 4, The description will be omitted.

The terminology used in the present invention is defined in consideration of the function of the present invention. It may vary depending on the intention or custom of the technician working in the field, .

The present invention is not limited to the above-described embodiments and various changes and modifications may be made by those skilled in the art, which is included in the spirit and scope of the present invention as defined in the appended claims.

100: Digital broadcast receiver
101: video / audio processing unit
105: Display panel
110: Signal input section
120: demodulator
140: Signal processor
150:
160:
170:
175: Audio output unit
180:
200: remote control device
211: Input Pad
213: Setting button
220:
240:
250: Output section

Claims (19)

Storing a private key in a storage unit provided in a digital broadcasting receiver;
Setting a security mode of a remote control device for remotely controlling the digital broadcasting receiver;
Encrypting transmission request data with a public key to generate an encrypted data signal when the security mode setting is completed;
Transmitting the encrypted data signal to the digital broadcast receiver;
The digital broadcasting receiver decoding the encrypted data signal with a private key; And
Receiving the decoded data signal and performing a corresponding command or request,
Wherein the public key is an encryption key corresponding to the private key, and the private key is a decryption key for decrypting the encrypted data signal. 2. The method of claim 1,
Wherein the decoding key is a decryption key corresponding to a unique product number of the digital broadcasting receiver. delete delete The method according to claim 1,
Determining whether to generate the encrypted data signal
Wherein the data input method further comprises: 6. The method of claim 5,
Further comprising the step of setting target data to be encrypted. 7. The method of claim 6, wherein determining whether to generate the encrypted data signal comprises:
Determining whether the transmission request data corresponds to the target data, and encrypting the transmission request data if determined
Wherein the data input method is a digital broadcasting receiver. The method according to claim 6,
Wherein the step of determining whether to generate the encrypted data signal
If the transmission request data is not the target data,
Transmitting the transmission request data to the digital broadcasting receiver; And
Receiving the transmission request data and performing a command or a request corresponding to an operation according to the transmission request data
Wherein the data input method further comprises: delete The method according to claim 1,
The step of transmitting the encrypted data signal
And the remote control device wirelessly transmitting the encrypted data signal to the digital broadcast receiver. A digital broadcasting system including a remote control device and a digital broadcasting receiver,
The remote control device
An encryption unit for encrypting the transmission request data, which is data to be transmitted, using the public key stored in the public key storage unit to generate an encrypted data signal when the security mode setting of the remote control apparatus is completed; And
And a transmission interface for transmitting the encrypted data signal to the digital broadcast receiver,
The digital broadcast receiver
A receiving interface for receiving an encrypted data signal encrypted with the public key; And
And a first controller for receiving the encrypted data signal, decrypting the encrypted data signal using the private key stored in the private key storage unit, and performing a command or a request corresponding to the decrypted data signal,
Wherein the public key is an encryption key corresponding to the private key, and the private key is a decryption key for decrypting the encrypted data signal. 12. The method of claim 11, wherein the private key
Wherein the digital broadcasting receiver is a decoding key corresponding to a unique product number of the digital broadcasting receiver. delete delete 12. The remote control device according to claim 11, wherein the remote control device
A second controller for determining whether or not to perform the encryption and generating the encrypted data signal when it is determined to perform the encryption,
The digital broadcasting system further comprising: 16. The apparatus of claim 15, wherein the second control unit
And sets the target data to be encrypted. 17. The apparatus of claim 16, wherein the second control unit
Determines whether the transmission request data corresponds to the object data, and controls the transmission request data to be encrypted when it is determined that the transmission request data corresponds to the object data. 17. The method of claim 16,
The second control unit
Determines whether the transmission request data corresponds to the target data, and controls the transmission request data to be transmitted if it is determined that the transmission request data does not correspond to the target data,
The receiving interface unit
Transmits the transmission request data to the first controller,
The first control unit
Receives the transmission request data, and controls a command or a request corresponding to an operation according to the transmission request data to be performed. The apparatus of claim 11, wherein the transmission interface unit
And wirelessly transmitting the encrypted data signal to the digital broadcast receiver.

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