KR100635724B1 - Electronic machine preventing copy contents of memory illegally and its method - Google Patents

Abstract

An electronic instrument having a function for preventing the memory from being illegally copied and a method thereof are provided to pass through an authentication process for confirming a preset locking ID during mass production of the electronic instrument, thereby prohibiting illegal copying of a memory. A data storage(226) stores data required for driving an electronic instrument. A locking storage(224) stores a preset first locking ID and a locking ID flag. The second storage(230) stores a preset second locking ID, while being not modified by a general user. A storage controller(222) compares the first locking ID of the locking storage(224) with the second locking ID of the second storage(230) as the locking ID flag of the locking storage(224) is set to a predetermined value, and controls a data read/write function of the data storage(226) according to the compared results.

Description

Electronic device preventing copy contents of memory illegally and its method

1 is a configuration diagram of a conventional flash memory;

2 is a configuration diagram of an embodiment of a wireless communication terminal having a memory piracy prevention function according to the present invention;

3 is a flowchart illustrating a method of illegally copying a memory in a wireless communication terminal according to the present invention.

* Explanation of symbols for the main parts of the drawings

210: control unit 220: first storage unit

224: lock storage unit 226: data storage unit

230: second storage unit 240: input unit (keypad)

250: display unit (LCD) 260: wireless transmission and reception unit

270: codec 280: voice input unit (microphone)

290: audio output unit (speakers)

The present invention relates to an electronic device having a memory piracy prevention function and a method thereof, and more particularly, to an electronic device for preventing illegal duplication of a memory by going through an authentication process for confirming a lock ID set at the time of mass production; It's about how.

In the present invention, the electronic device refers to a device to which a memory card can be detached / attached, such as a wireless communication terminal, a notebook computer, a camcorder, a digital camera, a portable multimedia player (PMP), and the like.

In the present invention, a wireless communication terminal is a mobile communication terminal, a personal mobile communication terminal (PCS), a personal digital terminal (PDA), a smart phone, a next generation mobile communication terminal (IMT-2000), such as a wireless terminal while carrying a person A terminal capable of wireless communication.

In the following embodiment, a wireless communication terminal among electronic devices will be described as an example.

In addition, the illegal copying of the wireless communication terminal in the present invention refers to illegally copying the memory contents of the wireless communication terminal of the same model to another wireless communication terminal.

Wireless communication has a lot of influence on society today. In just a few years, wireless handsets have had millions of subscribers in the United States, Europe and Asia. This dramatic development is also the beginning of the telecommunications revolution, but it is also the beginning of the revolution in piracy and fraudulent use of wireless communication terminals.

Conventional conventional wireless communication terminals use nonvolatile writeable memory to store data, code, or both. Such nonvolatile writable memories include Electrically Erasable Programmable Read-Only Memory (EEPROM) and flash Erasable Programmable Read-Only Memory (EPROM).

1 is a block diagram of a conventional flash memory.

Although the detailed components of the flash memory vary depending on the manufacturer, they are generally divided into a cell matrix which is a storage area of code or data and a control part that controls input / output of the cell matrix.

As shown in FIG. 1, when a control signal such as "CE", "OE", "WE", etc. is applied from outside the flash memory, the control part checks this and controls the input / output of the cell matrix.

For example, if the "CE" and "OE" signals are applied as low values after designating an address, the data stored at the designated address is output through the data line (read data), and if a specific address is designated After the "CE" and "WE" signals are applied as low values, specific data is input to the data line to perform a data write function to the specified specific address.

On the other hand, there is no protection device for data stored by operating the flash memory as described above. Therefore, when the illegal user detaches the flash memory from a wireless communication terminal that is normally operated for malicious purposes and connects it to a general-purpose flash memory device, the contents can be read or modified.

On the other hand, the flash memory of the conventional wireless communication terminal typically includes an equipment serial number (hereinafter referred to as "ESN"). When the wireless terminal is in operation, to identify whether the user is a legitimate subscriber so that the wireless service provider can provide the user with access to the wireless network and charge the user for a network connection. The ESN is broadcast.

On the other hand, in order to avoid paying for the wireless communication terminal service, when the ESN is acquired by a negative means and reprogrammed in another user terminal, frudulent cloning occurs.

And, as embedded systems face similar problems, application code is read from flash memory to reverse the product.

Piracy or fraud occurs when, in a typical analog user, the analog signal transmitted from the user is intercepted and decoded so that the user's ESN is provided to the intruder. The intruder then uses the acquired ESN to program it in another wireless communication terminal. If a fraudulently duplicated wireless communication terminal is used, its airtime is charged for the violated ESN.

Therefore, there is an urgent need for a method of preventing illegal copying of contents of a wireless communication terminal flash memory to prevent victims of good faith.

The present invention has been proposed to solve the above problems, and an object of the present invention is to provide an electronic device and a method for preventing illegal copying of a memory by going through an authentication process for confirming a lock ID set in advance.

Other objects and advantages of the present invention can be understood by the following description, and will be more clearly understood by the embodiments of the present invention. Also, it will be readily appreciated that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the claims.

An apparatus of the present invention for achieving the above object comprises: an electronic device having a memory piracy prevention function, comprising: data storage means for storing data necessary for driving the electronic device; Lock storage means for storing a preset first lock ID and a lock ID flag; Second storage means which cannot be modified by the general user and which stores a preset second lock ID; And comparing the first lock ID of the lock storage means with the second lock ID of the second storage means as the lock ID flag of the lock storage means is set to a predetermined value, and storing the data according to the result. Storage control means for controlling the data read / write function of the means.

On the other hand, the method of the present invention, the memory piracy prevention method in the electronic device, comprising the steps of: checking the value of the lock ID flag of the lock storage means as the power (on); An identification check step of confirming whether a first lock ID of the lock storage means and a second lock ID of the second storage means are the same as the lock ID flag is a predetermined value; Activating a data read / write function of a data storage means as the first lock ID and the second lock ID are identical as a result of checking the ID; Repeating the ID verification step for a predetermined number of times since the ID verification result is not the same as the first lock ID and the second lock ID; And an illegal copy prevention step of deactivating a data read / write function of the data storage means as the first lock ID and the second lock ID are not the same even after the predetermined number of times repeated.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, whereby those skilled in the art may easily implement the technical idea of the present invention. There will be. In addition, in describing the present invention, when it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a block diagram of an embodiment of a wireless communication terminal having a memory piracy prevention function according to the present invention.

As shown in FIG. 2, the wireless communication terminal having a memory illegal copy protection function according to the present invention includes a wireless transmission / reception unit 260 for transmitting / receiving a signal through a wireless communication network, menu selection information through a button, and the like. An input unit (keypad) 240 for receiving an input, a central control unit 210 for controlling overall operations of the wireless communication terminal and each component, and a data storage unit 226 for storing data necessary for driving the electronic device. ), A lock storage unit 224 for storing the first lock ID and the lock ID flag preset at the time of mass production, and a second storage that cannot be modified by a general user and stores a second lock ID preset at the time of mass production. When the data read / write operation is requested by the central controller 210, the lock ID flag of the lock storage unit 224 is set to a predetermined value. Accordingly, comparing the first lock ID of the lock storage unit 224 with the second lock ID of the second storage unit 230 and controlling the data read / write function of the data storage unit 226 according to the result. The storage control unit 222 for controlling the display unit (LCD) 250 and the central control unit 210 to display the status of the wireless communication terminal or the progress of the program under the control of the central control unit 210 Accordingly, the signal received from the wireless transmitter / receiver 260 is converted into a voice and output to the voice output unit (speaker) 290, and the voice received from the voice input unit (microphone) 280 is converted into a signal to the central control unit 210 A codec (270) for transmitting through the wireless transmitter / receiver 260, a voice output unit (speaker) 290 for outputting the voice received from the codec (270), Receiving a voice input the codec (270) And a voice input unit (microphone) 280 for delivery to.

The lock storage unit 224 and the data storage unit 226 may read and write RAM and EEPROM (Electrically Erasable Programmable Read-Only Memory) temporarily storing data generated during execution of various operating programs. The flash memory can be implemented using a flash memory whose contents are not erased even when the power supply is not supplied.

The second storage unit 230 may be implemented using a ROM that stores an operation program and a system program of the central controller 210. In particular, the second storage unit 230 may be implemented using a boot ROM that initializes system hardware and selects an operating system to boot from among ROMs. In addition, as illustrated in FIG. 2, the second storage unit 230 may be located outside the central control unit 210 or inside the central control unit 210.

In addition, the second storage unit 230 stores the second lock ID required for controlling the data read / write function to the data storage unit 226 at the time of mass production.

On the other hand, the lock ID flag stored in the lock storage unit 220 when the value is "0" to operate the data read / write function of the data storage unit 226 in the same manner as conventional, the lock When the ID flag is "1", the data read / write function of the data storage unit 226 operates only when a second lock ID identical to the first lock ID is stored in the second storage unit 230. Variable to do this.

In addition, the second lock ID is not applied through the input unit (keypad) 240, but is inserted into the second storage unit 230 in the form of a code when mass-produced and applied to the storage control unit 220 by a predetermined method. To be compared with the first lock ID.

Meanwhile, when the second storage unit 230 is implemented as a boot ROM as described above, when the wireless communication terminal is booted, a second lock ID stored in the boot ROM (second storage unit 230) is stored in the storage controller. The lock ID comparison process is performed at step 222.

On the other hand, in the initial mass production, the lock ID flag is set to "0" so that a program basically necessary for operating the wireless communication terminal is stored in the data storage unit 226, and the lock ID flag is later sold on the market. Set to "1" to prevent the contents of the data storage unit 226 from being illegally copied.

Meanwhile, as described above, when the data storage unit 226 and the lock storage unit 224 are implemented using a flash memory, and the second storage unit 230 is implemented using a boot ROM, an illegal user may perform normal wireless communication. When the data storage unit 226 and the lock storage unit 224 are taken from the terminal and mounted on the illegally obtained wireless communication terminal, the data storage unit 226 and the lock storage unit 224 may be used in the second storage unit (boot ROM) 230 of the illegally obtained wireless communication terminal. Since the stored second lock ID is not the same as the first lock ID stored in the lock storage unit 224 of the normal wireless communication terminal, data stored in the data storage unit 220 cannot be read.

Here, the lock storage unit 220 is stored in order to count the number of inconsistencies between the second lock ID stored in the second storage unit 230 and the first lock ID stored in the lock storage unit 224. Use a count variable.

Thus, if the count variable is greater than or equal to a predetermined value, there is a high probability that an illegal user attempts to find the correct first lock ID. Therefore, the data read / write function of the data storage unit 226 is permanently prohibited or Alternatively, the data storage unit 226 can operate normally only by inputting a more complicated unlocking code.

The input unit (keypad) 240 includes a plurality of numeric keys (letter keys), menu keys, and function keys for performing various functions, and outputs key data to the controller 210 by external operations. do.

The storage controller 222 transmits the lock ID flag stored in the lock storage unit 224 when the wireless communication terminal is powered on and the central controller 210 requests reading / writing of data. By checking, it is determined whether an authentication process is required for the read / write function of the data storage unit 226, and accordingly, the data read / write function of the data storage unit 226 is controlled by the above-described method.

In addition, the central control unit 210 requests the data from the storage control unit 222 to obtain data necessary for controlling the overall operation of the wireless communication terminal and each component.

In addition, the display unit (LCD) 250 is a display device such as a liquid crystal display (LCD). The display unit (LCD) 250 is controlled by the controller 210 to display a state of a wireless communication terminal or a program progress. That is, the overall state of the wireless communication terminal and the contents received through the input unit (keypad) 240 are displayed.

3 is a flowchart illustrating a method of illegally copying a memory in a wireless communication terminal according to the present invention.

First, the power is turned on and checks the value of the lock ID flag in response to a data request from the central controller 210 (310).

As a result of the check 310, as the value of the lock ID flag is "1", it is checked whether the first lock ID of the lock storage unit 224 and the second lock ID of the second storage unit 230 are the same ( 320).

As a result of the check 320, the first lock ID of the lock storage unit 224 and the second lock ID of the second storage unit 230 are the same, so that data is read from the data storage unit 226 as in the related art. The / write function is performed (330).

On the other hand, if the check result 320, the first lock ID of the lock storage unit 224 and the second lock ID of the second storage unit 230 is not the same after increasing the value of the count variable by 1 ( In operation 340, it is determined whether the count variable exceeds a predetermined value (350).

As a result of the check 350, if the count variable exceeds a predetermined value, the illegal user is regarded as attempting to illegally copy the contents of the data storage unit 226, and writes data in the data storage unit 226. The data read / write function of the data storage unit 226 may be performed by permanently prohibiting a read / read function or by inputting a higher unlock code (360).

On the other hand, when the check result 350, the count variable does not exceed a predetermined value, comparing the first lock ID of the lock storage unit 224 and the second lock ID of the second storage unit 230 again Proceed to "320".

On the other hand, as a result of the check 310, as the value of the lock ID flag is "0", the data read / write function of the data storage unit 226 is performed in the same manner as conventional (370).

As described above, when the data storage unit 226 tries to read or write data, an authentication process for confirming a lock ID is performed to prevent illegal data from being stored or read from the data storage unit 226. Can be.

As described above, the method of the present invention may be implemented as a program and stored in a recording medium (CD-ROM, RAM, ROM, floppy disk, hard disk, magneto-optical disk, etc.) in a computer-readable form. Since this process can be easily implemented by those skilled in the art will not be described in more detail.

The present invention described above is capable of various substitutions, modifications, and changes without departing from the technical spirit of the present invention for those skilled in the art to which the present invention pertains. It is not limited by the drawings.

The present invention as described above, there is an effect that can prevent illegal copying of the memory by going through the authentication process to confirm the lock ID set in advance at the time of mass production.

Claims (8)

In an electronic device having a memory piracy prevention function, Data storage means for storing data necessary for driving the electronic device; Lock storage means for storing a preset first lock ID and a lock ID flag; Second storage means which cannot be modified by the general user and which stores a preset second lock ID; And As the lock ID flag of the lock storage means is set to a predetermined value, the first lock ID of the lock storage means is compared with the second lock ID of the second storage means, and according to the result, Storage control means for controlling data read / write function Electronic device having a memory piracy prevention function comprising a. The method of claim 1, The lock storage means, And a count variable for counting a comparison count between the first lock ID and the second lock ID. The method of claim 2, The storage control means, When the lock ID flag of the lock storage means is a predetermined value, the data write / read function of the data storage means is controlled to be enabled when the first lock ID and the second lock ID are the same. Electronic device with copy protection. The method of claim 3, wherein The storage control means, The count variable of the lock storage means is increased by a first predetermined value as the first lock ID and the second lock ID are not the same, and the data is stored as the count variable becomes equal to or greater than a second predetermined value. An electronic device having a memory piracy prevention function, which permanently prohibits the data read / write function of the means or controls the data read / write function of the data storage means to be activated through an unlock code. The method according to any one of claims 1 to 4, The second storage means, An electronic device having a memory piracy prevention function, which is a boot ROM. In the memory piracy prevention method of the electronic device, Checking the value of the lock ID flag of the lock storage means as the power is turned on; An identification check step of confirming whether a first lock ID of the lock storage means and a second lock ID of the second storage means are the same as the lock ID flag is a predetermined value; Activating a data read / write function of a data storage means as the first lock ID and the second lock ID are identical as a result of checking the ID; Repeating the ID verification step for a predetermined number of times since the ID verification result is not the same as the first lock ID and the second lock ID; And The illegal copy prevention step of deactivating the data read / write function of the data storage means as the first lock ID and the second lock ID are not the same even after the predetermined number of times repeated. Memory piracy prevention method in an electronic device comprising a. The method of claim 6, The illegal copy prevention step, A method for preventing illegal copying of memory in an electronic device, characterized by permanently prohibiting a data read / write function of the data storage means. The method of claim 6, The illegal copy prevention step, And a data read / write function of the data storage means is deactivated using an unlock code.

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