KR100831321B1 - Embedded system having a function of preventing an illegal copying and method for controlling thereof - Google Patents

Abstract

Disclosed are an embedded system having illegal copy protection and a control method thereof. Embedded systems having illegal copy protection include a memory card and a body. The memory card stores application programs and map data. The memory card is inserted into the main body. When the system authentication data and the memory card authentication code stored in the main body exist, the main body generates an encryption code from the serial code stored in the memory card, and executes an application program when the system code is the same through comparison between the system authentication data and the encryption code. Accordingly, when a removable memory card such as an SD card or a CF card is used as a storage device, illegal copying can be prevented by executing an application program based on the authentication information stored in the main body and the memory card.

Embedded system, memory card, navigation, SD card, CF card

Description

EMBEDDED SYSTEM HAVING A FUNCTION OF PREVENTING AN ILLEGAL COPYING AND METHOD FOR CONTROLLING THEREOF}

1 is a block diagram illustrating an embedded system according to an exemplary embodiment of the present invention.

2A to 2D illustrate various codes stored in an embedded system and a memory card.

3 is a conceptual diagram illustrating generation of an encryption code.

4 is an internal block diagram illustrating a CF card according to an embodiment of the present invention.

5 is a flowchart illustrating a control method of an embedded system having illegal copy protection according to an embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

100: navigation body 102: GPS receiver

104: gyro sensor 106: central interface

108: host interface unit 110: central processing unit (CPU)

112: dynamic RAM 114: image signal processing unit

116: Video RAM 118: Screen Display

120: bus interface unit 122: CDMA chip

124 ： Voice signal processing unit 126 ： Authentication information storage unit

200: memory card 210: map data storage unit

220: code storage unit 230: controller

240: Flash module 300: GPS antenna

The present invention relates to an embedded system and a control method thereof, and more particularly, to an embedded system having an illegal copy prevention function and a control method thereof.

In general, an embedded system refers to a solution or system that is additionally mounted to perform a given task in a particular product or solution. For example, if a television function is included in a mobile phone whose main use is a telephone, the television function (system) is an embedded system.

Modern electronic, information and communication devices such as computers, home appliances, factory automation systems, elevators, mobile phones, etc., which have advanced functions, are mostly equipped with embedded systems. In most cases, it can work on its own, but it is said to be an embedded system only when combined with other products to perform ancillary functions.

In the case of a computer, it refers to a specific computer system or computing device that is designed to perform dedicated operations or to be used with a specific embedded software application. In general, no general-purpose computer or device can be used as a commercial replacement, so the office automation and personal computer functions allowed in certain embedded licensed products are restricted. However, programs like Embedded Linux can also be integrated with regular personal computers.

In addition to the computer, voice solutions contained in PDAs, televisions, rice cookers, refrigerators, and web functions embedded in automobiles are all embedded systems.

Meanwhile, data and software, for example, application software, required in an embedded system may be stored in various types of storage devices.

Among such various types of storage devices, a representative storage device required for a portable system such as a navigation system is a Secure Digital (SD) card and a Compact Flash (CF) card.

Therefore, the technical problem of the present invention is focused on this point, the object of the present invention is to prevent illegal copying of the memory card when using a removable memory card such as SD (SD) card or CF (CF) card as a storage device To provide an embedded system having an illegal copy protection function.

Another object of the present invention is to provide a control method of an embedded system having the illegal copy prevention function.

In order to realize the above object of the present invention, an embedded system having an illegal copy protection function according to an embodiment includes a memory card and a main body. The memory card stores an application program. The memory card is inserted into the main body. The main body generates an encryption code from the serial code stored in the memory card when the system authentication data and the memory card authentication code stored in the main body exist, and if the same through the comparison between the system authentication data and the encryption code, Run the application program.

For example, the memory card may be any one of a secure digital (SD) card, a compact flash (CF) card, a smart media card, a XD card, a memory stick, and a multimedia card. One.

In one example, the body includes a GPS receiver.

In one example, the memory card includes a map data storage.

For example, when the memory card authentication code does not exist, the main body checks whether a release code exists, and when the release code does not exist, determines that the copy is a copy and blocks the operation of the application. In this case, when the release code exists, the main body generates an encryption code from a serial code, sets the generated encryption code as system authentication data, deletes the release code, determines that it is a genuine product, and executes the application program. do.

For example, when the system authentication data and the encryption code are different from each other, the main body checks whether a release code exists, and if the release code exists, sets the generated encryption code as system authentication data and then releases the release code. Delete and determine the authenticity to run the application program.

For example, when the system authentication data and the encryption code are different, the main body checks whether a release code exists, and if the release code does not exist, determines that the copy is a copy to block the operation of the application program.

In order to realize the above object of the present invention, the embedded system includes a memory card storing an application program and a main body into which the memory card is inserted. do.

The control method of the embedded system having the illegal copy prevention function includes: (a) checking whether the system authentication data and the memory card authentication code exist in the main body as the memory card is inserted; (b) generating an encryption code based on a serial code stored in the memory card when the system authentication data and the memory card authentication code exist, and comparing the generated encryption code with the system authentication data; (c) in step (b), if the encryption code and the system authentication data are the same, determining the memory card as genuine and executing the application program; And (d) checking whether there is a release code if the encryption code and the system authentication data are different, and if the release code does not exist, determining the memory card as a copy to block operation of the application program. It includes.

For example, (e-1) in step (d), if the release code exists, setting the encryption code as system authentication data; (e-2) deleting the release code stored in the memory card; And (e-3) determining the memory card as a genuine product and starting the operation of the application program.

For example, (f-1) if it is checked in the step (a) that the memory card authentication code does not exist in the main body, checking whether there is a release code in the memory card; And (f-2) if it is checked in the step (f-1) that there is no release code, determining the memory card as a copy and blocking the operation of the application program. (G-1) generating an encryption code based on the serial code stored in the memory card when the release code is checked in step (f-1); (g-2) setting the generated encryption code as system authentication data; (g-3) deleting the release code stored in the memory card; And (g-4) determining the memory card as a genuine product and starting the operation of the application program.

For example, when the system authentication data does not exist in the main body in the step (a), the main body is determined to be a system non-compliance, and further comprising the step of blocking the operation of the application program.

In one example, the application program includes a program for performing a navigation operation based on the GPS signal.

According to the embedded system having an illegal copy protection function and a control method thereof, authentication information stored in the main body and the memory card when a removable memory card such as an SD card or a CF card is used as a storage device. By executing the application program on the basis of this, illegal copying can be prevented.

Hereinafter, with reference to the accompanying drawings, it will be described in detail the present invention.

1 is a block diagram illustrating an embedded system having an illegal copy prevention function according to an embodiment of the present invention. 2A to 2D illustrate various codes stored in an embedded system and a memory card. In particular, FIG. 2A is a diagram illustrating system authentication data stored in an embedded system, FIG. 2B is a diagram illustrating an authentication code (or memory card authentication code) of an SD card stored in an embedded system, and FIG. 2C is a memory card. FIG. 2D is a diagram for explaining a release code stored in a memory card, and FIG. 2D is a diagram for explaining a serial code of an SD card stored in a memory card. In this embodiment, a navigation system will be described as an example of an embedded system.

Referring to FIG. 1, a navigation system having an illegal copy prevention function includes a navigation main body 100, a memory card 200, and a GPS antenna 300, and stored in the main body 100 and the memory card 200. An application program, for example, a navigation program, is executed using the map information stored in the memory card 200 based on the authentication information.

The navigation body 100 includes a GPS receiver 102, a gyro sensor 104, a central interface unit 106, a host interface unit 108, a central processing unit (CPU) 110, and a dynamic RAM (DRAM) 112. Image signal processing unit 114, video RAM (VRAM) 116, screen display unit 118, bus interface unit 120, CDMA (Code Division Multiple Access) chip 122, audio signal processing unit 124 and authentication An information storage unit 126 is included.

In operation, the navigation body 100 performs a navigation operation based on a GPS satellite signal provided from the GPS antenna 300, and transmits / receives a voice signal or a data signal through the built-in CDMA chip 122. In addition, the navigation main body 100 outputs a corresponding voice signal through the speaker 400 or the microphone 500 connected thereto, or receives a voice signal, and is provided from a driver through the key input unit 600. It operates by receiving key signal.

The GPS receiver 102 calculates the current position of the vehicle from the GPS positioning signal received through the connected GPS antenna 300, and provides the GPS information from the gyro sensor 104 that detects azimuth information in association with the traveling direction of the vehicle. The current position information of the vehicle is transmitted to the central interface unit 106 by correcting the error of the GPS positioning information based on the azimuth information.

The central interface unit 106 includes the GPS receiver 102, the central processing unit 110, the image signal processing unit 114, the bus interface unit 120, the CDMA chip 122, and the audio signal processing unit ( 124 and interfacing with the key input unit 600.

The central interface unit 106 is responsible for interfacing with the map data storage unit 108 of the memory card 200 via the host interface unit 108.

The central processing unit (CPU) 110 provides the error corrected positioning information provided from the GPS receiver 102 to the CDMA chip 122, and provides the map information as a response signal to the map data storage unit 108. And map information is read and provided to the image signal processor 114 as the vehicle progresses to display map information.

The DRAM 112 stores data according to the execution of the navigation body 100. More specifically, the central processing unit 110 provides a place to load the system software and the driver software. The DRAM 112 is a volatile memory device in which stored data disappears when power is cut off.

The image signal processing unit 114 converts and displays map data input via the central processing unit 110 or the central interface unit 106 into a map image.

The VRAM (Video RAM) 116 has a RAM for writing pixel data and a serial access memory for outputting data to a display device, and is an image processing storage device that allows data to be exchanged between the memories.

The screen display unit 118 displays an image provided from the image signal processing unit 114. In addition, although the implementation of the screen display unit 118 is preferably integrated into the navigation main body 100, it may be implemented by being separated from the navigation main body 100. In addition, the screen display unit 118 may be implemented through various display devices. For example, the screen display unit 118 may be implemented through a liquid crystal display device, a plasma display device, or an organic EL display device.

The bus interface unit 120 is provided with vehicle speed sensor information or acceleration sensor information used to detect a moving distance of the vehicle through a connection with a vehicle speed sensor (not shown) or an acceleration sensor (not shown) of the vehicle. The control unit (ECU) receives the state information of the vehicle through the connection with the electronic control unit (ECU) (not shown) and provides it to the central processing unit 110 via the central interface unit 106.

The CDMA chip 122 transmits and receives high-speed, high-capacity wireless data including voice data in a CDMA manner, and provides a short message service (SMS) protocol, which is a short message service capable of transmitting and receiving short sentences of about 40 characters. The navigation main body 100 may access a communication network through the built-in CDMA chip 122, and may transmit and receive data to and from a vehicle navigation information providing system.

In particular, CDMA system transmits and receives signals while sharing time and frequency, so the capacity is more than 10 times that of conventional analog system, and the call quality is excellent and communication is guaranteed. External disturbance signal is despreading process. This is a communication technology that does not interfere with communication because it spreads oppositely.

Therefore, since the CDMA chip 122 can transmit and receive voice signals in both directions, a hands-free function can be realized through the speaker 700 and the microphone 800 provided without a separate hands-free set. Telephone communication service can be used without a wireless communication terminal or a vehicle telephone mounted in a vehicle.

The voice signal processor 124 outputs the voice signal input via the CDMA chip 122 to the speaker 700 and outputs the voice signal provided from the microphone 500 to the CDMA chip 122 or the central interface unit ( 106).

The speaker 400 outputs a route guidance broadcast in response to the direction in which the vehicle travels, or a warning broadcast alerting this when entering a road junction or a bottleneck section.

The key input unit 600 includes a plurality of keys, including a VDC (Voice Date Center) key for requesting voice input mode switching and an emergency rescue key for requesting assistance to an emergency center such as a 119 rescue team in case of an emergency such as a traffic accident. In addition, the vehicle navigation information request command corresponding to the driver's key operation is generated and transmitted to the connected central interface unit 110. In particular, when the VDC key is selected by the driver's operation, the voice signal processor 124 transmits a command by the voice input of the driver, which is input via the speaker 400 or the microphone 500, to the CDMA chip 122. do.

In this case, the CDMA chip 122 is connected to the voice signal processor 124 and transmits the received voice input command to the voice signal processor 124. When the emergency rescue key is selected by the driver's operation, the navigation main body 100 requests an access to the emergency center and transmits an emergency rescue message indicating that an emergency situation has occurred. In this case, the emergency rescue message is transmitted using a short message service (SMS) protocol having a better reception rate than a general telephone communication service without using general data communication.

The authentication information storage unit 126 stores system authentication data and a memory card authentication code. The system authentication data is data that is stored in a memory in the embedded system or another storage location in the embedded system from the time of factory shipment to enable authentication of the hardware. The memory card authentication code is an encryption code generated from a serial code stored in the memory card 200.

Meanwhile, the memory card 200 is a kind of flash memory in which stored information does not disappear even when the power is turned off. The memory card 200 includes a map data storage unit 210 and a code storage unit 220. ) Is inserted. The memory card 200 may be any one of a secure digital (SD) card, a compact flash (CF) card, a smart media card, a XD card, a memory stick, and a multimedia card. One.

The map data storage unit 210 may store not only map data, but also CCTV traffic information image data, information on a point of interest, an application program, for example, a program for executing a navigation operation.

The map data storage unit 210 stores map data, CCTV traffic information image data, and points of interest, which are input via the central interface 106 and the host interface 108.

The code storage unit 220 stores a release code of the memory card 200 and a serial code of the memory card 200.

The release code is stored in an area inaccessible to the user as a unique code given to the memory card 200 in the production stage of the memory card 200, as shown in FIG. 2C. The release code shown in FIG. 2C is, for example, 'THESIGN.INI', which can be identified as being a memory card manufactured by a manufacturer called TheSign.

In addition, the serial code is stored in an area inaccessible to the user as a unique code given to the memory card 200 in the production stage of the memory card 200, as shown in FIG. 2D. An encryption code is generated using the serial code. The serial code shown in FIG. 2D is, for example, 'PN1752BU977M'.

The navigation main body 100 may be configured to include the system authentication data stored in the authentication information storage unit 126 and the serial code stored in the memory card 200 when the memory card authentication code corresponding to the memory card 200 exists. Generate an encryption code, and execute the application program if it is the same through comparison between the system authentication data and the encryption code. The system authentication data is 'PN1752BU977M', as shown in FIG. 2A. In addition, the memory card authentication code is 'PN1752BU977M', as shown in Figure 2b.

The generation of the encryption code is performed as shown in FIG. 3 below.

3 is a conceptual diagram illustrating generation of an encryption code.

Referring to FIG. 3, the serial code of the memory card is 'PN1752BU977M'. Here, 'PN' is the product ID of the memory card, and '1752BU977M' is the serial number of the memory card.

The encryption code generated according to the present invention and stored in the authentication information storage unit 126 is assigned to correspond to each of ten numbers from 0 to 9 and randomly generated English alphabets. For example, 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9 correspond to B, Z, P, Q, C, O, L, U, M, and S. Therefore, the encryption code generated in FIG. 3 is 'PN1752079778'.

In the above description, the internal structure of the navigation main body 100 or the memory card 200 has been separated and described. However, the navigation main body 100 or the memory card 200 has been logically separated for convenience of description and are not separated in hardware.

4 is an internal block diagram illustrating a CF card according to an embodiment of the present invention.

Referring to FIG. 4, the CF card 200 according to an embodiment of the present invention includes a controller 230 and a flash module 240. The flash module 240 includes a map data storage unit 210 and a code storage unit 220 shown in FIG. 1.

The CF card 200 extracts the serial code from the code storage unit 220 of the flash module 240 when a serial code request is received from the navigation main body 100 via the host interface unit 108. To provide to the navigation body (100). In addition, the CF card 200 is stored in the code storage unit 220 of the flash module 240 when the request for the release of the release code from the navigation body 100 via the host interface unit 108. Delete the release code.

In the above description, an SD card which is a stamp-sized flash memory card has been described as an example, but it is obvious that the memory card standard can be applied to a CF card which is a flash memory card which is slightly larger than the SD card.

5 is a flowchart illustrating a control method of an embedded system having illegal copy protection according to an embodiment of the present invention. In particular, a flowchart illustrating a copy protection method using a unique serial number of a removable memory card in an embedded system.

1 to 5, as the memory card 200 is inserted into the navigation main body 100 and the power is turned on, it is checked whether system authentication data exists in the navigation main body 100 (step S100). .

In step S100, when it is checked that the system authentication data does not exist, after determining that the system is not suitable (step S110), the navigation system is terminated.

In step S100, when it is checked that the system authentication data exists, it is checked whether or not a memory card authentication code exists in the authentication information storage unit 126 (step S200).

In step S200, when it is checked that the memory card authentication code does not exist in the authentication information storage unit 126, it is checked whether a release code of the memory card 200 exists in the memory card 200. (Step S210).

In step S210, when it is checked that the release code does not exist, the memory card 200 is determined as a copy (step S212), and the navigation system ends.

In step S210, when it is checked that the release code exists, after reading the serial code in the memory card 200 (step S214), an encryption code is generated based on the serial code (step S216). The generation of the encryption code is as described in FIG. 3 above.

Next, the generated encryption code is set as an authentication code (or memory card authentication code) of the memory card 200 in the navigation system (step S218).

Subsequently, the release code stored in the memory card 200 is deleted (step S220), the memory card 200 is determined to be genuine (step S222), and the application program stored in the memory card 200 is started. .

On the other hand, when it is checked in step S200 that the memory card authentication code is present, after reading the serial code from the memory card 200 (step S230), an encryption code is generated based on the serial code (step S232). ).

Following step S232, the memory card authentication code in the navigation system is compared with the generated code (step S234).

In step S234, when the memory card authentication code and the encryption code are checked to be the same, the memory card 200 is determined to be genuine by feeding back to step S222, and the application program stored in the memory card 200 is determined. To start.

In step S234, if it is checked that the memory card authentication code and the encryption code are different, it is checked whether there is a release code of the memory card 200 (step S236).

In step S236, when it is checked that the release code exists, it is fed back to the step S218, and when it is checked that the release code does not exist, it is fed back to the step S212 to copy the memory card 200 into a copy. After the determination, the operation of the application program is terminated.

The control method of the navigation system shown in FIG. 5 described above is summarized in pseudocode as shown in Table 1 below.

TABLE 1

Insert SD / CF Card Power On (Run Application) if (no System_CertificateData) { System nonconformity determination Application termination } else // with System_CertificateData { if (no Card_CertificateCode in system) {// system that has never inserted a card if  ( Card  No my release code) { Copy judgment Application  End } else  // Card  I have my release code {// never  Uninserted Card SerialCode  = Card  of mine Serial Code Card _ CertificateCode  = encode ( SerialCode ) // in system Setting Remove release code // Application Delete this once it runs A genuine judgment Application  start } } else (with Card_CertificateCode in system) {// System with more than one card inserted SerialCode  = Card  of mine Serial Code CodeWord  = encode ( SerialCode ) if  ( Card _ CertificateCode  ! = CodeWord ) { if  ( Card  No my release code) { Copy judgment Application  End } else  // Card  I have my release code {// buy new Update One Card Card _ CertificateCode  = CodeWord  // in system Setting Remove release code A genuine judgment Application  start } } else // CodeWord == Card_CertificateCode { A genuine judgment Application  start } } }

As described above, according to the present invention, when a removable memory card such as an SD card or a CF card is used as a storage device of an embedded system, illegal copying of the memory card can be prevented.

Specifically, by illegally copying the memory card by executing the application program based on the system authentication data and the memory card authentication code stored in the main body of the embedded system, and the encryption code generated based on the serial code stored in the memory card. Can be prevented, and the use of a genuine system can be induced.

Although described above with reference to the embodiments, those skilled in the art can be variously modified and changed within the scope of the invention without departing from the spirit and scope of the invention described in the claims below. I can understand.

Claims (14)

A memory card storing an application program; And A main body into which the memory card is inserted, The main body, (i) when system authentication data for authentication of an embedded system and a memory card authentication code for authentication of the memory card exist in the main body, a password code is generated from a serial code stored in the memory card, and the system authentication data If and the encryption code is the same, run the application program, (ii) If the system authentication data does not exist in the main body, it is checked in the production step of the memory card whether there is a released code stored in the memory card. Embedded system having an illegal copy prevention function characterized in that for judging and blocking the operation of the application program. The memory card of claim 1, wherein the memory card is a secure digital (SD) card, a compact flash (CF) card, a smart media card, an XD card, a memory stick, or a multimedia. Embedded system having an illegal copy protection function, characterized in that any one of the cards. The embedded system having an illegal copy protection function according to claim 1, wherein the main body includes a GPS receiver. The system of claim 1, wherein the memory card includes a map data storage unit. delete The apparatus of claim 1, wherein the main body generates an encryption code from the serial code when the release code exists, After setting the generated encryption code as the system authentication code, delete the release code, Embedded system having an illegal copy protection function, characterized in that running the application program is determined to be genuine. The method of claim 1, wherein the main body checks the existence of the release code when the system authentication data and the encryption code are different from each other. If the release code exists, set the generated encryption code as system authentication data, then delete the release code, Embedded system having an illegal copy protection function, characterized in that running the application program is determined to be genuine. The method of claim 1, wherein the main body checks the existence of the release code when the system authentication data and the encryption code are different from each other. If the release code does not exist, it is determined that the copy is an embedded system having an illegal copy protection function, characterized in that to block the operation of the application program. In the control method of the embedded system comprising a memory card for storing the application program, and the main body into which the memory card is inserted, (a) checking whether the memory card authentication code and the system authentication data stored in the main body exist as the memory card is inserted; (b) generating an encryption code based on a serial code stored in the memory card when the system authentication data and the memory card authentication code exist, and comparing the generated encryption code with the system authentication data; (c) in step (b), if the encryption code and the system authentication data are the same, determining the memory card as genuine and executing the application program; And (d) If the encryption code and the system authentication data are different, in the production step of the memory card, it is checked whether there is a release code assigned to and stored in the memory card, and if the release code does not exist, The control method of the embedded system having the illegal copy protection function, characterized in that it comprises the step of determining the copy to block the operation of the application program. The method of claim 9, (e-1) in step (d), if the release code exists, setting the encryption code as system authentication data; (e-2) deleting the release code stored in the memory card; And (e-3) determining the memory card as genuine and starting the operation of the application program. The method of claim 9, (f-1) if it is checked in the step (a) that there is no memory card authentication code in the main body, checking whether there is a release code in the memory card; And (f-2) if it is checked in the step (f-1) that the release code does not exist, determining the memory card as a copy, and further comprising the step of blocking the operation of the application program. Control method of embedded system with illegal copy protection. The method of claim 11, (g-1) generating an encryption code based on the serial code stored in the memory card when the release code is checked in step (f-1); (g-2) setting the generated encryption code as system authentication data; (g-3) deleting the release code stored in the memory card; And (g-4) determining the memory card as a genuine product, and starting the operation of the application program. 10. The method of claim 9, further comprising: determining that the main body is a system non-compliance and blocking the operation of the application program when there is no system authentication data in the main body in the step (a). Control method of embedded system with illegal copy protection. The method of claim 9, wherein the application program comprises a program for performing a navigation operation based on a GPS signal.

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