KR100793793B1 - Broadcasting receiver and receiving method - Google Patents

Abstract

The present invention relates to a broadcast receiver capable of receiving a mobile broadcast and a method of receiving a conditional access (CA) broadcast signal. In particular, the present invention stores the software for providing information necessary for authentication and decryption to the memory card in advance or by downloading, and read the software stored in the memory card to operate based on middleware to perform authentication and decryption. Generates necessary information and decrypts the encrypted and transmitted mobile broadcast service using the decryption information. This not only enables low cost decryption at the broadcast receiver, but also minimizes the cost for broadcaster CAS equipment deployment and operation systems.

Mobile broadcast, CAS, software

Description

Broadcasting receiver and receiving method

1 is a diagram showing an embodiment of a general digital multimedia broadcasting service structure

2 is a block diagram illustrating an embodiment of a broadcast transmitter capable of transmitting an encrypted mobile broadcast service according to the present invention;

3 illustrates various types of mobile broadcast receivers and various types of memory cards;

4 is a block diagram illustrating a broadcast receiver capable of receiving a mobile broadcast service according to an embodiment of the present invention.

5 is an operation flowchart showing an embodiment of a decryption process according to the present invention.

Explanation of symbols for main parts of the drawings

300: host 301: control unit

302: front end 303: demultiplexer

304: Decryptor 305: A / V decoder

320: memory interface 300: memory card

The present invention relates to a broadcast receiver, and more particularly, to a broadcast receiver and a receiving method capable of receiving a mobile broadcast.

Digitalization of broadcasting is progressing rapidly through existing media such as terrestrial, satellite, and cable broadcasting, and is revolutionizing the environment of the broadcasting industry. Due to such environmental changes, a newly emerged medium is a broadcast receiver capable of receiving mobile broadcast.

There may be various broadcast receivers capable of receiving the mobile broadcast. For example, there are terminals such as digital multimedia broadcasting (DMB), digital video broadcasting-handheld (DVB-H), and media flow. In addition, the broadcast receiver applies a broadcast reception function to a personal portable terminal such as a mobile phone, a PDA, a notebook computer, a vehicle terminal, and provides various multimedia broadcasts to a user while moving or in a fixed place.

In particular, terrestrial digital multimedia broadcasting (DMB) has evolved from listening to watching and listening to broadcasting. The terrestrial DMB is based on Eureka-147 Digital Audio Broadcasting (DAB), which has been adopted as the European terrestrial radio standard. Added to improve multimedia broadcasting performance, RS codes (Reed-Solomon Code) and convolutional interleaver that are robust against burst errors that may occur on a transmission channel are added. The two additional blocks are applied to the DAB Ensemble input signal at the transmitter and provide an error rate low enough for video service even in a mobile receiving environment.

In addition, the transmission channel of the DMB broadcast is a wireless mobile reception channel, and the amplitude of the received signal is not only time-varying, but also the Doppler Spreading of the spectrum of the received signal due to the influence of the mobile receiver. Occurs.

In consideration of the transmission and reception in such a channel environment, the DMB transmission method uses differential coding based on Orthogonal Frequency Division Multiplexing (OFDM).

At this time, the DMB transmission signal is transmitted with a very small signal strength compared to the existing analog radio broadcasting signal, and considering the mobile reception as in a car in a severe fading channel environment such as downtown, the signal strength of the actual received signal is Very small Therefore, a broadcast receiver capable of receiving DMB should be able to receive a received signal as much as possible in such a poor reception environment and correct a transmission error. In addition, considering the fact that it is a mobile terminal, providing the maximum reception performance at a limited cost is a key requirement of a broadcast receiver configuration.

In such a DMB, at least one ensemble corresponding to one physical channel frequency range may be serviced.

1 illustrates an example of one ensemble structure, in which one ensemble is composed of at least one service, and each service is composed of at least one service component.

The service corresponds to one channel of TV or radio. The service component means video, audio, traffic information, or broadcast service information constituting a broadcast. In addition, it is possible to come to the service component is each sub-channel of the MSC (Main Service Channel) and FIDC (Fast Information Data Channel).

The multiplexing configuration information (MCI) is used to indicate what services are multiplexed in the ensemble, what service components constitute each service, and where the service components are located. That is, the MCI includes information on how the MSC is configured in the same frame, and the SI includes information on what services are provided through the MSC.

The MCI is transmitted through a fast information channel (FIC) in a DMB transport frame.

That is, the DMB transmission frame is composed of a synchronization channel (Fynchronization Channel), a fast information channel (FIC), and a main service channel (MSC).

The synchronization channel has a predetermined shape so that the DMB receiver recognizes the beginning of the frame, and is assigned a null symbol and a phase reference symbol (PRS).

The FIC is used to transmit various types of information for receiving a broadcast service, and is composed of an MCI, a service information (SI), and a fast information data channel (FIDC).

The MSC is composed of one or more Common Interleaved Frames (CIFs), and is used for transmitting broadcast services such as video, audio, and data. The smallest unit that can allocate an address in one CIF is a capacity unit (CU), and a plurality of CUs are connected to form one subchannel. In order to transmit the service component of the MSC, two data transmission modes, a stream mode and a packet mode, are supported.

In other words, the control information FIC contains information indicating the structure of data carried in the CIF in the MSC, which is data information, and each CIF contains actual data such as video data and audio data. The biggest difference between the FIC and the MSC depends on whether it is time de-interleaving and transmitted. The FIC is not time interleaved, the MSC is time interleaved, and most of the data is transmitted through the MSC.

And the data service that can be provided by DMB is various. For example, Program Associated Data (PAD) and Independent Data (N-PAD; Non Program Associated Data), Service Information (SI), Multimedia Object Transfer (MOT) Slide Show, Broadcast Web Site; BWS), Interactive Services, and Live Video Services.

The transmission mode most commonly used in the data transmission is a packet mode, in which data is divided into data groups. In addition, the MOT protocol is a transmission protocol for delivering a multimedia object (ie, content) using a data channel to various types of receivers capable of receiving multimedia decode. The targets of the MOT protocol are text, images, video, and audio. At this time, in the terrestrial DMB, the MOT transmission makes the multimedia object into the MOT standard and then transmits it in packet mode or PAD.

In such a DMB, there is a need for conditional access (CA) for the purpose of charging for paid services or viewing age-restricted services.

However, in order to implement the CA system (CAS), there is no choice but to subordinate to the CAS company, and the cost of the development and the cost for the operation management are all incurred by the broadcaster, the receiver manufacturer, and the receiver user, thereby increasing the price of the service. It is expected to be a major limiting factor. For example, broadcasters should provide CAS providers with CAS equipment construction and operating system costs, and receiver manufacturers should provide CAS companies with costs for CAS development, certification costs, and royalties. In the case of a receiver user, a cost may be incurred when purchasing a smart card, and a cost increase of a broadcaster and a receiver manufacturer may be caused by a price increase of a product and a service provided.

As such, CAS construction through a CAS company as a whole can be carried out in a structure that is expensive and dependent on the CAS company.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a broadcast receiver and a reception method for performing restoration to a state before reception restriction on mobile broadcast data that is reception-restricted without being dependent on hardware. In providing.

In order to achieve the above object, a broadcast receiver according to an embodiment of the present invention comprises a memory card that stores software for providing information necessary for authentication and decryption; And attaching and detaching the memory card, and reading software stored in the memory card to operate based on middleware to generate information necessary for performing authentication and decryption, and encrypting and transmitting the decryption information using the decryption information. And a host decrypting the mobile broadcast service.

The host may be configured to perform authentication between the memory card and the host by loading software on the middleware base when the power is turned on when the memory card is inserted or when the memory card is newly inserted.

The host may download software from a broadcasting station where the memory card and pay service authentication are performed, and upgrade the software of the memory card.

When the authentication between the host and the memory card is successful, the software operating on the middleware is configured to extract information necessary for decryption by decoding a message for credential management and a message for credential control transmitted from a corresponding broadcasting station. .

Receiving method of a broadcast receiver comprising a host for receiving and decoding a mobile broadcast service according to the present invention and a memory card detachable from the host,

Reading software from the memory card to provide information necessary for authentication and decryption and loading the software onto a middleware base;

Operating the software based on the middleware to generate information necessary to perform authentication and decryption; And

And decrypting the mobile broadcast service that is encrypted and transmitted by using the information necessary for the decryption.

The software loading step is characterized in that when the power is turned on to the host while the memory card is inserted, or when a memory card is newly inserted, the software is read from the memory card and mounted on the middleware base.

The decryption information extraction step includes performing authentication between the memory card and the host, and extracts information necessary for decryption only when authentication is successful.

The decryption information extraction step may include receiving a message for credential management and a message for credential control; Confirming a reception entitlement of the host from the message for managing entitlement; Confirming a reception qualification of the mobile broadcast service encrypted and transmitted from the message for qualification control when the reception qualification of the host is confirmed; And extracting information necessary for decryption from the message for managing the qualification and the message for controlling the qualification when the receiving qualification of the mobile broadcast service is confirmed.

Other objects, features and advantages of the present invention will become apparent from the following detailed description of embodiments taken in conjunction with the accompanying drawings.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention that can specifically realize the above object will be described. At this time, the configuration and operation of the present invention shown in the drawings and described by it will be described as at least one embodiment, by which the technical spirit of the present invention and its core configuration and operation is not limited.

In addition, the terminology used in the present invention is a general term that is currently widely used as much as possible, but in certain cases, the term is arbitrarily selected by the applicant. In this case, since the meaning is described in detail in the description of the present invention, It is intended that the present invention be understood as the meaning of the term rather than the name.

In general, a CA method may be used to modify a signal to be restricted received using an arbitrary key (eg, a control word) or to mix the signal itself. This term is used in various terms such as scramble, encryption, and the like. In the present invention, the term is referred to as encryption. The encryption includes the meaning of scramble. The reverse process of the encryption is called decryption, which likewise includes the meaning of descramble.

In the DMB system, there may be a plurality of paths for performing CA. In the present invention, for convenience of description, three paths are provided as embodiments, and each of the sub-channel CA mode, data group CA mode, and MOT CA is used. It is called a mode.

The sub channel CA mode is a mode in which an encryption is performed at a sub channel stage, and all data included in the sub channel are encrypted. That is, the entirety of a specific subchannel such as an audio stream including a PAD, a packet mode channel, and a stream mode channel can be encrypted.

The data group CA mode is a mode for performing encryption at the data group end, and is applied to IP tunneling, a MOT directory mode, a MOT header mode, a TDC, and the like, which form a data group. That is, data not included in the data group is not encrypted, and in this case, both encrypted data and unencrypted data may exist in one subchannel. For example, an audio program may not be encrypted in one subchannel, but only data encrypted in the data group stage may be encrypted.

The MOT CA mode is a mode for performing encryption at the MOT stage, and is applied to files and user applications transmitted using the MOT directory mode.

FIG. 2A is a block diagram illustrating an embodiment of a broadcast transmitter having such an encryption function, and a DAB audio program 201 is performed by the audio encoder 206 using a masking pattern adapted universal sub-band integrated coding and multiplexing (MUSICAM). Is compressed and output to the encryptor 210.

The data 202 transmitted to the MOT directory mode, the MOT header mode, IP tunneling, and the TDC forms at least one data group in the data group assembler 207 and is output to the encryptor 210.

The data service 203 to be transmitted in the packet mode is first multiplexed by the packet multiplexer 208 and output to the encryptor 210.

The data service 204 to be transmitted in the stream mode, the MOT directory mode, and the user applications 205 are output directly to the encryptor 210.

The encryptor 210 encrypts the input signal according to the CA mode so that it cannot be viewed by a receiver that does not have a reception qualification. For example, in sub-channel CA mode, all signals included in the sub-channel, i.e., signals output from the audio encoder 206, the data group assembler 207, and the packet multiplexer 208, and the stream mode data service. 204, encrypts all MOT directory mode / user applications 205.

If in the data group CA mode, only the signals of the data group formed by the data group assembler 207 are encrypted.

Also, in MOT CA mode, only those files / user applications that are transferred using the MOT directory mode are encrypted.

The signals encrypted by the encryptor 210 are multiplexed by the multiplexer 220 and then transmitted through the transmitter 221 and the antenna 222.

At this time, the encryptor 210 includes an encryption unit 211, an Entitlement Control Message (ECM) generating unit 212, and an Entitlement Management Message (EMM) generating unit 213 as shown in FIG. 2B. It consists of.

The encryption unit 211 encrypts a signal that requires encryption using a control word (CW) generated by the ECM generator 212.

The ECM generation unit 212 generates a control word (CW) and outputs it to the encryption unit 211, and also encrypts the CW with an authentication key and transmits it to the ECM. For example, the ECM generator 212 may periodically transmit the CW encrypted with the authentication key to generate new CW and encrypt the CW. The ECM generator 212 may add the mobile broadcast service information and the reception qualification (eg, 18 years old or older, price, etc.) of the mobile broadcast service to the ECM.

The EMM generator 213 is for entitlement / update / management of a receiver, and the authentication key used to encrypt the CW and a reception qualification (eg, a standardized serial number of a receiver having a reception qualification) used for encrypting the CW. Send to EMM. In this case, the authentication key may be encrypted by using a distribution key again. The EMM need not be delivered in synchronization with the transmission program, and an electronic signature may be added to prevent message tampering. The receiving entitlement is stored in a Subscriber Authorization Server (SAS) 214. That is, the SAS 214 stores information about new and existing subscribers.

As described above, the present invention is for software-decrypting a broadcast signal transmitted in a limited reception manner, in particular, a mobile broadcast service using various types of memory cards.

To this end, the present invention stores CAS software in advance or by download to the memory card. And whenever the broadcast receiver is powered on with the memory card inserted, or whenever the memory card is newly inserted into the broadcast receiver, the CAS software stored in the memory card is loaded into the broadcast receiver to receive a restricted mobile broadcast service. Provides the information needed for decryption.

In the present invention, in order to distinguish the memory card from the broadcast receiver main body that can receive the mobile broadcast, the rest of the memory card, that is, the broadcast receiver main body will be referred to as a host. The memory interface between the memory and the host may be provided externally or may be provided in the host. Alternatively, the host and the memory may be provided respectively. The memory interface may vary depending on the type and specification of the memory card.

The memory card is a data storage device used in various digital electronic products such as PC, PDA, digital camera, MP3 player, mobile broadcast receiver, mobile phone.

The memory is largely divided into a volatile memory and a nonvolatile memory, and a flash memory (or also referred to as a flash ROM) that is intermediate between the volatile memory and the nonvolatile memory.

The nonvolatile memory corresponds to a ROM type, and it is impossible to repeatedly write data instead of maintaining the stored contents even when the electronic product is turned off. The volatile memory corresponds to a type of RAM, and stored contents are erased when the power is turned off. The flash memory compensates for the shortcomings of the volatile / nonvolatile memory. The flash memory can repeatedly write data and maintain the stored contents even when the electronic product is turned off. The flash memory is a kind of hard disk or floppy disk.

The memory card mainly uses flash memory, and may also use a small hard drive.

The type of memory card is various, such as a compact flash (CF) card, a memory stick, a smart media card, a secure digital (SD) card, and the like.

3 illustrates various types of memory cards and types of broadcast receivers to which the memory cards can be attached and detached. The broadcast receiver detachable from the memory card may be an MP3, a mobile phone, a PDA, a vehicle receiver, a notebook, a camera, a USB card, etc. capable of receiving a mobile broadcast. The memory card may have a slot type such as an SD or CF memory. It can be installed in the form of a memory stick or USB.

The present invention stores CAS software in at least one of these various types of memory cards, and inserts the memory card storing the CAS software into a host for use in authentication and decryption.

In this embodiment, the CAS software read from the memory card is mounted in a resident memory in the host and driven in one application form. In particular, according to the present invention, the CAS software is mounted and executed on a middleware base. In an embodiment, the middleware is Java (JAVA) middleware.

In this case, the memory card may be used only in one broadcast receiver or may be used in multiple broadcast receivers according to the contents, authentication, encryption, and charging method of the CAS software stored in the memory card.

For example, when a mobile phone and a PDA having a mobile broadcast reception function are the same user's name and the user applies for a paid DMB service, the CAS software of the memory card may operate normally only with one of the mobile phone and the PDA. In addition, all of the mobile phones and PDAs may operate normally through authentication. Alternatively, a predetermined cost may be paid in advance, and may be normally operated in any broadcast receiver or broadcast receiver of the same name until the cost is exhausted.

The CAS software stored in the memory card has a function of providing at least information necessary for authentication and information necessary for decryption.

At this time, in order to use the paid service, authentication is required between the broadcast receiver and the broadcasting station, and authentication is required between the broadcast receiver and the memory card.

That is, when a user applies for a paid service through a communication means such as a telephone or the Internet or a corresponding broadcast receiver, authentication must be performed between the broadcasting station providing the paid service and the broadcast receiver in order to obtain a paid service qualification. In this case, the authentication method is similarly performed through mutual data exchange through a communication means or a corresponding broadcast receiver. In this case, it may be determined whether the charging method, the memory card is valid in only one broadcast receiver, or valid in a plurality of broadcast receivers. In this case, the memory card may include information of the broadcast receiver normally authenticated. The information of the broadcast receiver may be, for example, unique information such as a standardized serial number.

In addition, whenever a broadcast receiver is powered on with a memory card inserted or a new memory card is inserted, authentication must also be performed between the broadcast receiver and the memory card. In this case, a process of confirming whether the memory card is normally available in the broadcast receiver is performed. For example, it may be determined that authentication is successful if the unique number of the corresponding broadcast receiver is compared with the unique number of the broadcast receiver stored in the memory card.

In the present invention, for convenience of description, in one embodiment, authentication between a broadcasting station and a broadcast receiver is referred to as pay service authentication, and authentication between a memory card and a broadcast receiver is called memory card authentication.

FIG. 4 is a block diagram illustrating a broadcast receiver according to an embodiment of the present invention, and is largely composed of a host 300 and a memory card 350, and assumes that paid service authentication has already been made.

The host 300 includes a controller (CPU) 301, a front end 302, a demultiplexer 303, a decoder 304, an A / V decoder 305, and a memory interface 320. It is configured to include).

The front end 302 receives and demodulates the mobile broadcast and related additional information of a specific channel under the control of the controller 301 and outputs the demodulated signal to the demultiplexer 303 in the form of a transport stream.

The demultiplexer 303 multiplexes and separates the audio stream, the video stream, and the data stream from the input stream, and the encrypted audio stream and the video stream are decoded by the decoder 304 and / or the A / V decoder ( 305). The CA state, Entitlement Management Message (EMM) / Entitlement Control Message (ECM) packet of the current broadcast is extracted from the data stream and output to the middleware engine equipped with CAS software. The middleware engine is an engine that analyzes and executes an application. The middleware engine will be described as one example based on Java. That is, the CAS software operates as a single application in a middleware engine.

In this case, the audio stream and the video stream separated by the demultiplexer 303 may be outputted to the decoder 304 unconditionally regardless of whether the decryption is performed, the decoder 304 and the A / V decoder 305. You can also output them at the same time. Also, the encrypted stream may be output to the decoder 304 and the unencrypted stream may be directly output to the A / V decoder 305.

If the decoder 304 receives both the audio stream and the video stream separated by the demultiplexer 303 regardless of whether the decryptor 304 is encrypted, the decoder 304 does not encrypt the input stream. It outputs directly to the A / V decoder 305. If encrypted, the encrypted stream is decrypted using the decryption key provided by CAS software and then output to the A / V decoder 305.

If the A / V decoder 305 receives both the audio stream and the video stream separated by the demultiplexer 303, regardless of whether or not it is encrypted, the A / V decoder 305 encrypts the input stream. If not, the input stream is decoded through the corresponding decoding algorithm. If it is encrypted, the stream deciphered and output by the decoder 304 is decoded through the corresponding decoding algorithm.

This process may be performed through the control of the controller 301.

The controller 301 reads CAS software stored in the memory card 350 through the memory interface 320 whenever the host 300 is powered on or whenever the memory card 350 is inserted. Subsequently, the controller 301 resides in the resident memory the CAS software read from the memory card 350, and the middleware engine operates the CAS software based on the Java middleware. In FIG. 4, 310 in which Java middleware and CAS software are stored is a kind of resident memory.

When the CAS software stored in the memory card 350 is operated based on Java middleware, the CAS software first performs authentication between the host 300 and the memory card 350. For example, if the unique number of the broadcast receiver included in the CAS software is identical to the unique number of the broadcast receiver read from the controller 301 of the host 300, the memory card 350 may determine whether the host ( It is confirmed as a normal memory card available at 300).

Thereafter, the CAS software operating based on Java middleware parses the EMM / ECM packet output from the demultiplexer 303 to determine whether the corresponding receiver, that is, the host, is eligible for reception, and if it is determined that the reception is eligible, decryption. Information necessary for (ie CW) is obtained and provided to the decoder 304.

That is, first check the reception qualification of the current receiver through the EMM. For example, the identification process reads the unique number of the corresponding receiver from the host 300 and compares the unique number of the receiver transmitted to the EMM. If the two unique numbers match, the host 300 is entitled to receive. It is confirmed. The unique number may be a standardized serial number of the receiver.

When the host's reception qualification is confirmed, the host determines whether the host is eligible to receive the mobile broadcast service by using the mobile broadcast service information transmitted to the ECM and the reception qualification of the mobile broadcast service. When the qualification for receiving the mobile broadcast service is confirmed, the encrypted CW transmitted to the ECM is decrypted using the authentication key transmitted to the EMM and then output to the decryptor 304.

The above operations are performed in CAS software operating on a Java middleware basis.

The decryptor 304 decrypts the mobile broadcast service encrypted and transmitted using the CW and converts the mobile broadcast service into a normal mobile broadcast service.

If the authentication between the memory card 350 and the host 300 is not performed, for example, if the unique number of the broadcast receiver included in the CAS software and the unique number of the broadcast receiver received from the controller 301 are not the same, the CAS software may not be the same. May not work, or even if the CAS software operates based on Java middleware, the EMM / ECM cannot be parsed normally, and thus information for decryption cannot be obtained. Therefore, the decryptor 304 cannot decrypt the encrypted mobile broadcast service.

FIG. 5 is an operation flowchart illustrating the above-described decryption process, and assumes that a paid service authentication is performed between a corresponding broadcasting station and a memory card in order to use a paid DMB service such as traffic information (step 501). .

When the host, that is, the broadcast receiver is powered on with the memory card inserted or the memory card is newly inserted (step 502), CAS software is read from the inserted memory card and mounted on the Java middleware base (step 502). 503).

Subsequently, based on Java middleware, the CAS software performs authentication between the memory card and the broadcast receiver (i.e., the host) to check whether the memory card is a memory card that is qualified to be used normally in the broadcast receiver (step 504). .

If the step 504 is performed and the memory card authentication is successful (step 505), the receiving qualification of the host is confirmed using the EMM transmitted from the broadcasting station, and if the receiving qualification of the host is confirmed, the received certificate is encrypted and transmitted using the ECM. The reception entitlement of the mobile broadcast service is checked (step 506).

In step 506, if the reception qualification of the mobile broadcast service is confirmed, the CW transmitted to the ECM is decrypted using the authentication key sent to the EMM and output to the decryptor 304 (step 507).

The decoder 304 decrypts the encrypted mobile broadcast service using the CW and outputs the decrypted mobile broadcast service to the A / V decoder 305 (step 508).

Meanwhile, CAS software stored in the memory card can be extended according to a pay service to be provided by a broadcasting station. In addition, the CAS software may include other additional information as well as information related to authentication and decryption.

The host may download CAS software from a broadcasting station and upgrade CAS software stored in the memory card 350. Even in this case, the CAS software upgraded and stored in the memory card 350 resides in the resident memory of the host 300, and operates based on Java middleware to perform authentication and decryption information between the memory card 350 and the host 300. To provide.

As such, the present invention implements the CAS system in a manner that satisfies all the memory cards, thereby realizing the maximum function at the minimum cost in a broadcast receiver capable of receiving mobile broadcast, in particular, a receiver capable of receiving DMB service. The diversity of the receiver can be respected.

The present invention is not limited to the above-described embodiments, and as can be seen in the appended claims, modifications can be made by those skilled in the art to which the invention pertains, and such modifications are within the scope of the present invention.

According to the broadcast receiver and the reception method for receiving mobile broadcast according to the present invention described above, if any type of broadcast receiver is provided with only an external memory interface, the CAS software is read from a memory card that can be attached to or detached from a host. By providing the information necessary to perform authentication and decryption by driving in the form, it is possible to satisfy the diversity of the receiver and to perform decryption at a low cost in the receiver. In addition, since only the minimum application program interface (API) needs to be implemented in the implementation method, the burden on the receiver manufacturer can be minimized, and the part that had to be dependent on the CAS company can be removed. This also minimizes the cost for broadcaster CAS equipment deployment and operation systems.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the present invention.

Therefore, the technical scope of the present invention should not be limited to the contents described in the embodiments, but should be defined by the claims.

Claims (18)

A memory card in which software programmed to perform authentication and extract information necessary for decryption is stored; And Includes a removable host of the memory card, The host is A controller which reads the software stored in the memory card and mounts the software on the middleware base; A middleware engine configured to perform authentication between the host and the memory card by operating the software read from the memory card based on middleware, and extract and output information necessary for decryption from the received data; A decrypter that receives the information necessary for decryption from the middleware engine and decrypts the encrypted and transmitted mobile broadcast service; And And a decoder for decoding the decrypted mobile broadcast service. The method of claim 1, And the memory card is a memory type capable of repeatedly reading and writing. The method of claim 1, wherein the control unit And power is turned on when the memory card is inserted or when a memory card is newly inserted, reads software from the memory card and mounts it on a middleware base to perform authentication between the memory card and the host. The method of claim 1, wherein the control unit And upgrading the software of the memory card by downloading the software from the broadcasting station where the memory card and the paid service authentication are performed. The method of claim 4, wherein the control unit When a software upgrade of the memory card is performed, the broadcast receiver is read from the memory card and mounted on a middleware base to perform authentication between the memory card and the host. delete delete The method of claim 1, The middleware engine is a broadcast receiver, characterized in that the Java middleware engine. The method of claim 8, The software operating based on Java middleware in the middleware engine decodes a message for entitlement management and a message for entitlement control transmitted from a corresponding broadcasting station and extracts information necessary for decryption. A reception method of a broadcast receiver comprising a host for receiving and decoding a mobile broadcast service and a memory card attachable to and detachable from the host, The host performs authentication and reads the programmed software from the memory card and mounts it on a middleware base to extract information necessary for decryption; Operating the software based on the middleware to perform authentication between a host and a memory card, and extracting and outputting information necessary for decryption from the received data; And And decrypting the encrypted and transmitted mobile broadcast service using the information necessary for the decryption. 11. The method of claim 10, wherein the software loading step Receiving power from the memory card and loading the software onto the middleware base when the power is turned on to the host or the memory card is newly inserted. 12. The method of claim 11, wherein extracting decryption information comprises: And extracting information necessary for decryption from data received only when authentication between the memory card and the host is successful. The method of claim 12, wherein extracting decryption information comprises: And determining that the authentication between the memory card and the host is successful when the unique number of the host stored in the software and the unique number of the host read from the host match. The method of claim 13, And the unique number is a standardized serial number of a host. The method of claim 10, wherein extracting decryption information comprises: Parsing a message for qualification management and a message for qualification control if authentication between the memory card and the host is successful; Confirming a reception entitlement of the host from the message for managing entitlement; Confirming a reception qualification of the mobile broadcast service encrypted and transmitted from the message for qualification control when the reception qualification of the host is confirmed; And And if the reception qualification of the mobile broadcast service is confirmed, extracting information necessary for decryption from the message for qualification management and the message for qualification control. delete The method of claim 10, The middleware is a Java middleware. The method of claim 10, And downloading the software from the broadcasting station for which the memory card and the paid service authentication have been performed, and upgrading the software of the memory card.

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