KR101737061B1 - Personal information data safeguarding and tracing method for mobile telecommunication terminal - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a method of encrypting and tracking data in a mobile communication terminal when personal information data or a mobile communication terminal including a lost chip is lost.
Preferably, the present invention provides a mobile communication terminal, which is managed by a subscriber management system and includes a predetermined loss management program, the method comprising the steps of: operating the loss management program at the same time that the mobile communication terminal is powered on; The method comprising the steps of: setting a loss management program to be inactive when a user of the mobile terminal expects a loss of the mobile communication terminal; A step of releasing the setting state such that the loss management program is activated when a state requiring a judgment is expected; and a step of preventing personal information data from being displayed on the mobile communication terminal screen when the loss determination algorithm result is determined to be lost And the hidden personal Transmitting encrypted personal data to the subscriber management system when the encrypted mobile communication terminal is in a communicatable state; transmitting to the subscriber management system all personal information data existing in the mobile communication terminal, And decrypting the personal information data.

Description

TECHNICAL FIELD [0001] The present invention relates to a personal information data protection and tracking method for a personal digital assistant (PDA)

The present invention relates to a method of encrypting and tracking data in a mobile communication terminal when the mobile communication terminal is lost.

Japanese Patent Application Laid-Open No. 2002-351720 discloses a method for determining a priority order for detecting a lost situation and retrieving important data in a terminal and a PIM data management apparatus using a PIM function regardless of the memory capacity of the mobile communication terminal, And management methods.

However, the above-described prior art requires a selection of a data collection target, or determines a priority by referring to a schedule, a modification and a date of the data, and the problem is that the data can not be collected as intended by the user have.

In order to solve such a problem, a portable terminal device and a data recovery method capable of controlling the priority of data retrieval with a single index and efficiently retrieving data under a limited amount of power based on a single index are disclosed in Korean Patent Application 2005-0122855.

According to Korean Patent Application No. 2003-0101356 entitled " mobile communication terminal capable of remote control and its manufacturing method ", when a mobile communication terminal is lost, a user remotely controls the mode of the lost mobile communication terminal by transmitting an SMS message, The present invention can prevent an unauthorized use attempt by turning off all the display devices of the mobile communication terminal, save power of the battery, extend the operation time of the GPS module of the mobile communication terminal, ), A MIN (Mobile Identification Number), and the like.

However, in order to restrict the use of the illegal acquirer by controlling the lost mobile communication terminal, the communication state must be maintained with the lost mobile communication terminal. Currently, smart phones (3G phones) and LTE (Long Term Evolution, technology that 'evolved' 3G mobile communication (3G) in the long term) of the mobile communication terminals have been developed to provide various kinds of personal information, contents input / output information, And communication can be realized. If it is removed, it is impossible to communicate realistically. Therefore, since the remote control disclosed in Korean Patent Application No. 2003-0101356 is practically impossible, it can not prevent the unauthorized use of the terminal, and it is also difficult to recover the terminal.

Korean Patent Application No. 2006-0122748, filed by Samsung Electronics under the name of " Tracking Device and Method for a Handheld Terminal ", discloses a device for increasing the recovery rate of a lost handset in a handheld terminal including a heart- . When the wake card is installed in the portable terminal capable of installing the wake card, the wake card information is extracted and the wake card information is compared with the wake card information preset in the portable terminal, And transmits a text message including the recipient's telephone number, the portable terminal information and the message contents to the portable terminal corresponding to the setting information by a preset program, thereby preventing the illegal use of the lost mobile terminal And a method of tracking and recovering a terminal is proposed.

However, Korean Patent Application No. 2006-0122748 does not consider various situations that may occur after a mobile communication terminal is lost. For example, after receiving a lost mobile communication terminal, the recipient may turn off the power or remove the wasting chip to make communication impossible. If this occurs before detecting the loss of the mobile communication terminal, many problems may be caused. Also, if the communication is impossible even after detecting the loss, it also can not control the lost mobile communication terminal. Serious problems may arise if the recipient takes measures to prevent the lost mobile terminal from being used for illegal purposes. This is because the illegal use of the mail information in the lost mobile communication terminal, the telephone directory, the public certificate, and the information recorded in the notepad can be used. In other words, the method disclosed in Korean Patent Application No. 2006-0127748 has a problem in that it can not take a countermeasure if a serious problem as described above occurs.

In Korean Patent Application No. 2005-0017341, when an unauthorized terminal which is not registered normally such as a duplicate terminal or a lost terminal is used, it is necessary to provide a terminal which can not be unauthorized to each mobile terminal in addition to the terminal unique number (ESN) And an illegal terminal detection and control method which can restrict the use of the coded product serial number. The world trend related to the hard-coded product serial number is IMEI (International Mobile Equipment Identity), which is a 'terminal international unique identification number', so that the manufacturer of the mobile communication terminal can identify each terminal. The maximum number of 15-digit device numbers to be assigned (including format approval code, final combination code, and serial number) is used.

However, most mobile phone companies in the US, Europe, etc., operate 'open IMEI management system,' which permits communication regardless of IMEI registration and prevents communication of only reported terminals such as lost or stolen. Separate distribution channels are developed, and terminals are freely purchased and used regardless of the distribution network.

On the other hand, the domestic mobile telecommunication company operated a closed IMEI management system that registers the IMEI of the terminal in its own system and allows only registered terminals to communicate with it. Thus, a closed structure other than the mobile communication carrier has been formed and there is controversy over the transparency of the terminal price. , And restrictions on users 'terminal options, etc. In addition, competition in terminal prices has been unlikely to trigger competition due to a mix of manufacturers' incentives and mobile subsidies.

However, as the recent self-subsidy system (blacklist system) has been implemented, various routes for purchasing mobile phones have been diversified. In the past, if a mobile phone was purchased and opened through a distributor and a retailer of a mobile communication company, an open IMEI management system for purchasing a mobile phone from a distribution network of a mobile phone manufacturer as well as a mobile phone manufacturer and an online shopping mall . In addition, you can easily open a mobile phone that you bought a used handset or brought from abroad. As a result of this system, IMEI registration is an option which is not mandatory. Another problem is that IMEI registration is lost and mobile communication terminal is lost without registering IMEI.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a mobile communication terminal, And an object of the present invention is to provide a method of protecting and tracking personal information data of a mobile communication terminal including a function of performing a loss judgment algorithm, an encryption algorithm, and decryption.

According to the present invention, the loss management program may include a step of setting the loss management program not to be activated in advance when the user visits the service center due to a situation that the user can not control, that is, the failure or abnormal operation of the mobile communication terminal , And setting the loss management program not to be activated in advance even when the mobile communication terminal is not used at the time of traveling abroad for a long time and traveling.

In order to achieve the above object, according to a preferred embodiment of the present invention, when the mobile communication terminal including the personal information data or the invisible chip is lost, in order to encrypt and track data of the mobile communication terminal, A method of controlling a mobile communication terminal having a predetermined loss management program, the method comprising the steps of: operating the loss management program upon power-on of the mobile communication terminal; And setting the lost management program to be inoperable if it is predicted that the loss management program is not operated; and when the user of the mobile communication terminal is predicted to be in a state requiring loss determination, The setting state is set so as to be operated The method includes the steps of: preventing personal information data from being displayed on a screen of the mobile communication terminal when a result of the loss determination algorithm is determined to be lost; performing encryption of the hidden personal information data; The method comprising the steps of: transmitting all personal information data existing in the mobile communication terminal to the subscriber management system when the terminal is in a communicable state; and decrypting the personal information data received by the subscriber management system A method for protecting and tracking personal information data of a terminal is provided.

According to the present invention, the loss determination algorithm includes a plurality of setting means that can be determined by the user to be lost, and includes a function of previously setting whether to delete or hide the mobile communication terminal determined to be lost.

In the present invention, when a mobile communication terminal is lost, an algorithm for estimating loss is operated by a loss management program that is downloaded and installed in a subscriber management system. When the loss management program is operated, a loss determination algorithm The loss decision algorithm is a very important process because it is determined that the loss is determined and the deletion or hidden function of the personal information data is performed through the determination result.

The loss decision algorithm can be designed in various cases, and the first condition is that the mobile communication terminal is located in an area where communication is impossible and communication is impossible. The second condition may be set to a case where the loss management program detects a loss by inserting a source for detecting a down of a telephone directory, a notepad, a mail, a certificate, and the like. The third condition may be set to an algorithm including a condition for determining that the lost mobile communication terminal is lost if a predetermined time after the removal of the wasted chip is removed. The fourth condition compares the previously stored worm chip information with the newly inserted worm chip information when the worm chip is inserted, and determines that the worm chip information is lost if it is different. More specifically, such condition setting may be configured in accordance with the environment of the subscriber management system.

The fifth condition registers user information including wasting chip information of all the mobile communication terminals of the user who subscribes to the subscriber management system. In recent years, since a single user possesses various types of mobile communication terminals and can insert the mobile communication terminal by inserting the mobile communication terminal by inserting the mobile communication terminal into a terminal that intends to use only the wasting chip according to circumstances, If the loss management program is activated, an unwanted situation may be detected in which a lost chip is determined to be lost. In consideration of this situation, it is necessary to register user information such as wasting chips of all the mobile communication terminals that are used at the time of joining.

That is, the present invention provides a mobile communication terminal in which a mobile communication terminal is managed by a subscriber management system in which all mobile communication terminal information of a subscriber is registered and a predetermined loss management program is built in, Checking a predetermined first predetermined time after the removal of the idler chip mounted on any one of the subscriber's mobile communication terminals registered in the subscriber management system, The method comprising the steps of: requesting input of a preset password to the lost management program running on the communication terminal; determining that the correct password is input within the first predetermined time, Checking a predetermined second predetermined period of time if the user can not input the password; Determining that the password is lost if the correct password is not input within the second predetermined period of time; determining that the personal information data is not displayed on the screen of the mobile communication terminal when the loss determination algorithm result is determined to be lost; Transmitting encrypted personal information data to the subscriber management system; encrypting the private information data when the encrypted mobile communication terminal is in a communicable state; transmitting all personal information data existing in the mobile communication terminal to the subscriber management system; And decrypting the personal information data received by the subscriber management system.

In addition, by registering the international mobile terminal number (IMEI) under the sixth condition, when the mobile communication terminal is lost, it can be reported as a lost phone and prohibited illegal use of the lost phone. In addition, So that the leakage of important user information in the lost phone can be blocked in advance.

The seventh condition allows the subscriber management system to primarily register a commercially available area in which the subscriber is primarily active when registering the subscriber. After the consent of the user, the loss management program causes the current location to be memorized at a predetermined time interval, and stores the current location in a predetermined period, for example, 6 months, 7 months to 12 months, If it is determined that the subscriber's mobile communication terminal is out of the commercial area, which is an active space that has been memorized since the lapse of a predetermined period of time, the subscriber's mobile communication terminal is judged to be lost and the loss judgment algorithm is operated.

That is, the present invention provides a mobile communication terminal that is managed by a subscriber management system and includes a predetermined loss management program, the method comprising the steps of: operating the loss management program at the same time that the mobile communication terminal is powered on; Checking the location of the mobile communication terminal of the user subscribed to the mobile communication terminal at regular intervals; storing location information of the mobile communication terminal checked at regular intervals; The method comprising the steps of: setting information as a commercial area; checking a predetermined time when the mobile communication terminal set as a commercial area leaves the commercial area; determining that the mobile communication terminal is lost if the predetermined time exceeds a predetermined time .

If the mobile communication terminal determined to be lost by the loss determination algorithm is set to INVISIBLE in the subscriber management program, the encryption algorithm determines whether encryption is to be performed according to the cause of the loss determination, The personal information data is encrypted.

In general, the control method of a mobile communication terminal analyzes the monitoring or control request of the IT management information transmitted from the portable mobile communication terminal and transmits it to the IT management server, and transmits the IT management information transmitted from the IT management server to the personal portable terminal The network performance, the system performance, the database performance, and the application performance can be inquired and controlled, and the encryption and decryption can naturally be performed through such a process.

Here, the encryption of the mobile communication terminal is performed by performing character string encryption such as PKI method for maintaining the security of the network and the Internet in data communication on the network, or acquiring the source address and the destination address of the data packet, It is possible to perform various encryption algorithms such as encrypting the string by converting the corresponding string to different case on the basis of the value derived from the operation result of the source address and the destination address.

The encryption method according to the present invention is related to a special situation of the loss of the mobile communication terminal. Therefore, it is preferable that the encryption algorithm is embedded in the mobile communication terminal itself to perform encryption even when communication is impossible.

Since the encryption of the personal information data is performed in the mobile communication terminal itself, it is not affected by the communication state of the terminal. In addition, since the invisible personal information data determined to be lost may be leaked by a high-level expert in the field, the function of encrypting after performing the invisible function of the personal information data in the lost mobile communication terminal is additionally provided To protect personal information data. The personal information data of the mobile communication terminal can be protected more securely. Of course, it is also possible to perform decryption in a controllable terminal center by communicating with an encrypted mobile communication terminal.

The decryption algorithm transmits the encrypted personal information data of the user mobile communication terminal to the subscriber management system when the mobile communication terminal and the subscriber management system can communicate with each other after performing the encryption by the loss decision algorithm The subscriber management system decrypts the received encrypted personal information data to track illegal use of the mobile communication terminal.

In addition, when a subscriber who is subscribed to the subscriber management system accidentally removes the wisecrack, even after a predetermined period of time has elapsed, use of the user's personal information data and normal communication become difficult. Therefore, when the subscriber management system requests the administrator of the subscriber management system to return to the normal state, the process of remotely decrypting the subscriber identity after the subscriber identity verification is included.

Also, according to the present invention, since the mobile communication terminal receives the mobile communication terminal, the mobile communication terminal can perform the communication according to the time, the situation where the communication is impossible, the algorithm before and after the removal of the chip, And to provide a method for protecting valuable customer information contained in a terminal and further for recovering a lost mobile communication terminal. Also, the terminal may be able to apply an algorithm that can be performed even when there is no idle chip.

Preferably, it should be considered that the mobile communication terminal can return to the original owner after receiving it. The present invention proposes a method of recovering data of a lost terminal in consideration of various situations after a lost mobile terminal.

As described above, according to the personal information data protection and tracking method of the mobile communication terminal proposed in the present invention, the personal information data can be safely protected according to the lost status of the mobile communication terminal. According to the present invention, the recovery rate can be increased by analyzing all user information of the lost mobile communication terminal.

FIG. 1 is a block diagram briefly showing a remote control system for deleting personal information stored in a lost mobile communication terminal according to an embodiment of the related art.
2 is a block diagram of a method of encrypting and tracking data in a mobile communication terminal according to an embodiment of the present invention.
3 is a diagram illustrating a method of encrypting and tracking data in a mobile communication terminal according to an embodiment of the present invention.
4 is a view illustrating a method of decrypting personal information data and tracking invisible chip information in an encrypted mobile communication terminal in a subscriber management system according to an embodiment of the present invention.

Hereinafter, the principle of operation of the preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that only the parts necessary for understanding the operation according to the embodiment of the present invention will be described in the following description, and the description of other parts will be omitted within the scope of the present invention.

The terms or words used in the claims of the present invention described below should not be construed as limited to ordinary or dictionary meanings and the inventor should appropriately interpret the invention in terms of terms in the best way possible It should be interpreted in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined. Therefore, it should be understood that various equivalents and modifications may be made without departing from the spirit and scope of the present invention.

In the present invention, a state in which communication is possible and a state in which communication is impossible are interlocked and programmed. That is, after receiving the mobile communication terminal, the mobile communication terminal can perform the communication according to the temporal flow, the communication impossible state, and the algorithm before and after the removal of the wasting chip, And to provide a method for recovering a lost mobile communication terminal. In addition, the terminal may be capable of applying an algorithm that can be performed even when there is no wasted chip (means for substituting wasted chips in the terminal).

The key point of the present invention is that, when it is determined that the mobile communication terminal is lost due to the loss decision algorithm when the mobile communication terminal is lost, the customer invisible in the lost mobile communication terminal is INVISIBLE and the invisible information is encrypted, It is to prevent collecting. The customer information in the mobile communication terminal determined to be lost may be stored invisible and encrypted by the loss determination algorithm and then stored in the untrusted area or by inserting the invisible chip (the invisible chip is the original user or another illegal user A program for causing the subscriber management system to simultaneously transmit the worm chip information of the user and the worm chip information of the newly inserted user to the subscriber management system, . Also, it is possible to provide the subscriber management system with means for decrypting the received encrypted customer information and tracking the lost mobile communication terminal.

In addition, the lost management program may be installed in the subscriber management system by the user, and the program may include functions such as a loss decision algorithm, an encryption algorithm, and a decryption function.

FIG. 1 is a block diagram schematically illustrating a personal information deletion system stored in a lost mobile communication terminal according to an embodiment of the present invention.

The personal information protection system of the related art includes a user terminal 120, a mobile communication network 110, a subscriber management system 100, and the like.

The user terminal 120 inputs a short message according to the input of the user's key value and then makes a call to the radio base station 111 composed of the base station 113 and the base station controller 112 to transmit the inputted short message to the mobile communication network 110 to the mobile communication terminal 120. The user terminal 120 is a terminal capable of using a short message and is a terminal subscribed to the short message service for using the short message. In the embodiment of the present invention, the mobile communication terminal 120 is exemplified as an apparatus for inputting and transmitting a short message. However, the mobile communication terminal 120 may include a computer installed with a web browser and capable of inputting and transmitting a short message on the web. Also, the user terminal 120 is connected to the mobile communication network 110 to perform a normal voice call through wireless communication with the called terminal, and performs a session setting procedure automatically according to a session setting request from the mobile communication network 110 And transmits and receives packet data.

The user terminal 120 confirms personal information through the personal terminal information DB 101 of the subscriber management system 100 and sends a control signal to the mobile communication switching center 114 through a program built in the personal information deletion server 102 And deletes the personal information stored in the memory of the user terminal 120 by receiving the deletion command message from the SMSC 115, which is the SMS center. Here, the personal information means information including at least one of a telephone number list, a photograph, a moving picture, a call history, a short message transmission / reception content, and a personal file stored in the user terminal 100.

Herein, the delete command message is a message for controlling the user terminal 120 to delete the contents of the memory in which the personal information is stored. When a delete command message is received by the user terminal 120, And recognizes and analyzes the delete command message and deletes all the personal information stored in the memory of the user terminal. In order to implement such a function, the application program and control unit stored in the user terminal 120 include a function of recognizing and processing a delete command message.

1, the control message request signal is generated and transmitted to the SMS center to obtain the status and location information of the terminal, and the control message is transmitted to the user terminal through the paging channel to be stored in the memory of the user terminal And deletes the personal information that has been created. Also, if it is impossible to transmit a control message from the personal information deletion server to the user terminal, periodic J message is periodically transmitted to the user terminal to grasp the communication state and delete the personal information in the user terminal as described above.

This conventional technology can not control a lost mobile communication terminal unless communication is allowed according to the state of the lost mobile communication terminal or the state of the wireless communication network. SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior art, and it is an object of the present invention to provide a mobile communication terminal having a function of waiting for a program through a lost judgment algorithm in a lost mobile communication terminal, . In addition, the subscriber management system that provides this service can select INVISIBLE, which is a data hiding function, in addition to deletion when it is judged to be lost at the time of initial membership.

In particular, the subscriber management system may be communicated to the subscriber management system through the loss notification prior to the execution of the algorithm to control the subscriber remotely as in the prior art.

As described above, according to the present invention, when a mobile communication terminal is lost due to a communication incapability, when a remote control is impossible, a member's mobile communication terminal has a lost judgment algorithm built in a certain subscription group (such as a bank, Install the program.

The built-in program may include an option to select whether to delete the customer information in the case where it is determined that the mobile communication terminal is lost, in order to check whether the mobile communication terminal is lost or not. Completely deleting customer information is important information that is dangerous because the personal information data in the lost terminal contains high-level information such as core technology of the specific industry, Function.

However, if the lost mobile communication terminal can not be found, the customer who wants to retrieve his / her own information again and the customer who wants to retrieve the lost mobile communication terminal must select INVISIBLE as an option.

Also, a state in which communication is impossible is possible even when the receiver of the lost mobile communication terminal deliberately removes the chip. Even in such a case, since the communication is disabled, the mobile communication terminal is equipped with a program having a built-in loss judgment algorithm, and the deleted mobile communication terminal itself is operated to delete and INVISIBLE program so that the receiver of the lost mobile communication terminal Can be prevented.

Also, as will be described later, it is possible to program such that the receiver of the lost mobile communication terminal automatically stores the worm chip information whenever the user changes the worm chip information in preparation for mounting the worm chip newly. This makes it possible to prevent the receiver of the lost mobile communication terminal from illegally using it.

2 is a block diagram of a method of encrypting and tracking data in a mobile communication terminal according to an embodiment of the present invention.

The mobile communication terminal managed by the subscriber management system can be lost at any time and if it is lost, it is necessary to accurately determine the loss and to prevent leakage of all the personal information data in the lost mobile communication terminal thereafter. Referring to FIG. 2, when the power of the mobile communication terminal is turned on, a loss determination algorithm can be operated by a predetermined loss management program.

Also, before the loss decision algorithm operates, the loss management program is set so that the loss management program is not activated in advance when the user visits the service center due to a situation that the user can not control, that is, due to malfunction or malfunction of the mobile communication terminal And setting the loss management program not to be operated in advance even when the mobile communication terminal is not used at the time of traveling abroad for a long time and traveling. Thus, it is possible to solve the problem that the user does not intentionally operate the loss determination algorithm, and to solve the problem through the service center and to set the loss management program to operate again when the mobile communication terminal is not used for a long time .

The loss management program is activated simultaneously with the power-on, except that the loss management program is not activated, and the program including the loss judgment algorithm of the mobile communication terminal is downloaded through the subscriber management system as shown in step S201 .

The loss decision algorithm can be designed in various cases, and the first condition is that the mobile communication terminal is located in an area where communication is impossible and communication is impossible.

The second condition may be set to a case where the loss management program detects a loss by inserting a source for detecting a down of a telephone directory, a notepad, a mail, a certificate, and the like.

The third condition may be set to an algorithm including a condition for determining that the lost mobile communication terminal is lost if a predetermined time after the removal of the wasted chip is removed. Providing a certain period of time in the third condition is a very important factor considering the case where the user accidentally removes the wisdom chip or the case where the mobile communication terminal is removed due to an external shock. If the invisible chip is accidentally removed in the power-off state, there is no problem if the invisible chip is remounted in the power-off state as it is.

However, if power is turned on in the power-off state, the invisible chip is not present. Therefore, it is determined that the invisible chip is lost by the loss determination algorithm, and the invisible and encryption processes are performed. You may be faced with an unwanted situation that requires remote control to perform a return to origin. In consideration of this situation, when a predetermined time is given after power-on, it is determined to be normal when the wick chip is re-mounted within the time, so that the algorithm should not be performed after the undesired loss decision. Also, the same process should be performed when the chip is removed from the power-on state. However, the user can set the predetermined time that can be set in the loss management program to be very short (can also be set to 0), so that the user can be judged to be lost within a very short time when the chip is removed.

The fourth condition compares the previously stored worm chip information with the newly inserted worm chip information when the worm chip is inserted, and determines that the worm chip information is lost if it is different. More specifically, such condition setting may be configured in accordance with the environment of the subscriber management system.

The fifth condition registers user information including wasting chip information of all the mobile communication terminals of the user who subscribes to the subscriber management system. In recent years, since a single user possesses various types of mobile communication terminals and can insert the mobile communication terminal by inserting the mobile communication terminal by inserting the mobile communication terminal into a terminal that intends to use only the wasting chip according to circumstances, If the loss management program is activated, an unwanted situation may be detected in which a lost chip is determined to be lost. In consideration of this situation, it is necessary to register user information such as wasting chips of all the mobile communication terminals that are used at the time of joining.

In addition, by registering the international mobile terminal number (IMEI) under the sixth condition, when the mobile communication terminal is lost, it can be reported as a lost phone and prohibited illegal use of the lost phone. In addition, So that the leakage of important user information in the lost phone can be blocked in advance. The International Mobile Equipment Identity (IMEI) is an international standard that is given as a maximum 15-digit device number assigned by a mobile phone manufacturer when manufacturing a mobile phone. Most IMEI mobile communication companies allow communication with the IMEI regardless of whether they are registered or not. The company also operates an 'open IMEI management system' that blocks communications only from notified devices, such as theft, so that separate distribution channels such as manufacturers and distributors are developed in addition to mobile operators, and mobile phones are freely purchased and used without any restriction on the distribution network. This system is currently being implemented and it plans to exchange information with foreign mobile communication companies.

The seventh condition allows the subscriber management system to primarily register a commercially available area in which the subscriber is primarily active when registering the subscriber. After the consent of the user, the loss management program causes the current location to be memorized at a predetermined time interval, and stores the current location in a predetermined period, for example, 6 months, 7 months to 12 months, If it is determined that the subscriber's mobile communication terminal is out of the commercial area, which is an active space that has been memorized since the lapse of a predetermined period of time, the subscriber's mobile communication terminal is judged to be lost and the loss judgment algorithm is operated.

If it is determined as NO in step S203, the situation is immediately terminated. If it is determined in step S203 that the information is not lost, in step S205, whether or not the option set by the user after the initial program download is deleted or INVISIBLE The next operation is performed.

If the user option is deleted, all information is deleted as in step S207. Such deletion may be limited to a case where the owner of the original mobile communication terminal determines that the owner of the mobile communication terminal is very important or special secret information in the mobile communication terminal and selects itself. If the user option is not deleted, in step S209, that is, after the loss is determined, encryption is performed through the personal information encryption algorithm, and then all personal information encryption information in the mobile communication terminal is transmitted to the subscriber management system. In the subscriber management system, It is possible to grasp the information of the original owner of the lost mobile communication terminal, thereby grasping the receiver's in-spicy chip information of the lost mobile communication terminal, suppressing the use of the lost mobile communication terminal, It is possible to receive the lost mobile communication terminal by grasping the wasting chip information and the position of the lost phone.

3 is a diagram illustrating a method of encrypting information in a mobile communication terminal and tracking a mobile communication terminal according to an embodiment of the present invention.

In step S309, the receiver of the lost mobile communication terminal performs a hidden function so that the receiver can not view the personal information when INVISIBLE, which is not the delete option, is selected. Then, in step S311, It is repeatedly checked whether the communication is possible in step S313, and if the communication is in the communication state, the lost management program inputs the user password previously set in step S315. If the preset password matches the password entered by the user, it is visibly returned to the normal state.

If it is determined that the encryption is not performed in step S321, the encryption is performed in step S323. If the encryption is not performed, the encryption is performed in step S323, and the communication enabled state is repeatedly checked in step S325, The encryption information and inserted ward chip information are transmitted to the subscriber management system in step S329.

The encryption is already performed in step S321 and the communication state is repeatedly checked in the next step S325. In this case, it is determined that the predetermined period of time has elapsed since the power-on, When the power is turned on again, since the encryption is already performed, step S325 is performed.

Thereafter, in step S331, the subscriber management system decodes the original owner information of the lost mobile communication terminal by performing the decryption in step S333. In addition, the subscriber management system can recognize the original owner information of the lost mobile communication terminal, It is possible to perform step S335, which is a step of grasping the invisible chip information and notifying the organizing entity. Finally, the mobile communication terminal can be recovered in step S337. Of course, the subsequent administrative processing may be different depending on the situation of the subscriber management institution.

4 is a diagram illustrating an algorithm for performing encryption and decryption of user information data in a mobile communication terminal according to an embodiment of the present invention.

Referring to FIG. 4, the encrypting step S323 of the personal information data encryption algorithm S209 after the loss is determined will be described in more detail.

In step S401, the lost management program downloaded and installed from the subscriber management system managing the lost terminal generates a data burst signal for requesting encryption after performing INVISIBLE when it is determined to be lost.

S403 receives the burst signal from S401, receives the generated encryption request, and encrypts the personal information data area in the terminal. In step S405, the personal information data area in the wasting chip attached to the mobile communication terminal is encrypted. Next, in step S407, the personal information data area in the removable memory is encrypted. If it is determined in step S409 that the encrypted personal information data can be communicated by inserting the chip, the subscriber management system generates a personal information data decryption request burst signal in step S411, decrypts the private information data area in the terminal in step S413, The personal information data area in the idle chip is decoded, and in step S417, the personal information data area in the other removable memory is decoded.

Also, the subscriber management system can remotely decode the data at the request of the user.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and similarities. Therefore, the scope of the present invention should not be limited by the illustrated embodiments, but should be determined by the scope of the appended claims and equivalents thereof.

100: subscriber management system, 101: personal terminal information DB,
102: personal information deletion server, 110: mobile communication network,
112: base station controller, 114: mobile communication switching center,
129: User terminal.

Claims (16)

delete delete delete delete delete delete delete delete A method for protecting data in a terminal from a terminal,
Determining whether the terminal is lost or not according to a setting in the terminal;
Determining whether the terminal is lost according to whether the terminal satisfies a predetermined condition in the terminal if the terminal is determined to be lost from the loss decision decision process; Whether or not an attempt to download data in the terminal has been detected, whether a predetermined time has elapsed after the worm chip of the terminal has been removed, and whether the worm chip is newly inserted into the terminal And whether or not the information of the previously inserted wicked chip and the information of the newly inserted wicked chip are different from each other;
An option checking step of checking a preset option in the terminal if the terminal is determined to be lost from the loss decision process; And
And a data processing step of processing data in the terminal based on the option checked in the option checking step
The method comprising the steps of: delete 10. The method of claim 9,
The loss determination process includes:
The method comprising the steps of: comparing user information including information of a worm chip of the terminal when determining whether the worm chip newly installed in the terminal is different from the installed worm chip of the terminal; if the user information is the same, And determining that the wormhole chip is the same as the previously installed wormhole chip. 10. The method of claim 9,
The loss determination process includes:
In determining whether or not the terminal has departed from a preset area, an area in which the terminal is currently located is stored for a predetermined period of time, and based on the stored information, it is determined whether the terminal is out of a preset area Wherein the data protection method comprises: 10. The method of claim 9,
The option checking process may include:
Wherein whether the preset option is to delete data in the terminal or to hide data in the terminal is confirmed. 10. The method of claim 9,
Wherein the data processing step comprises:
If the option checked in the option checking step deletes the data in the terminal,
And deleting the personal information data in the terminal, the buffer chip and the removable memory. 10. The method of claim 9,
Wherein the data processing step comprises:
When the option checked in the option check step hides the data in the terminal,
Wherein the personal information data in the terminal, the buffer chip and the removable memory are encrypted. A computer-readable recording medium recording a program for implementing a method for protecting data in a terminal,
Determining whether the terminal is lost or not according to a setting in the terminal;
Determining whether the terminal is lost according to whether the terminal satisfies a predetermined condition in the terminal if the terminal is determined to be lost from the loss decision decision process; Whether or not an attempt to download data in the terminal has been detected, whether a predetermined time has elapsed after the worm chip of the terminal has been removed, and whether the worm chip is newly inserted into the terminal And whether or not the information of the previously inserted wicked chip and the information of the newly inserted wicked chip are different from each other;
An option checking step of checking a preset option in the terminal if the terminal is determined to be lost from the loss decision process; And
And a data processing step of processing data in the terminal based on the option checked in the option checking step
A method of protecting a data in a terminal, comprising the steps of:

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