KR100692651B1 - Method for securing data in portable device and record media recorded program for realizing the same - Google Patents

Abstract

A method for securing storage data in a portable terminal and a recording medium for recording a program for realizing the same are provided to execute a lock function only for corresponding data after separating data separately inputted according to an external SIM or a default SIM, thereby maintaining standards in WCDMA(Wideband Code Division Multiple Access) or GSM(Global System for Mobile communication) modes and preventing illegal usage of a mobile communication service when the portable terminal is lost. A method for securing storage data in a portable terminal comprises the following steps of: receiving a data lock signal from a mobile communication network(S402); determining whether an external SIM(Subscriber Identify Module) is connected or not(S404); if so, reading out both of information about the external SIM and information about a default SIM, and if not so, reading out information about the default SIM(S408,S406); comparing SIM information included in the data lock signal with the SIM information which is read out in the above step(S410); and if the two information are consistent with each other, converting data corresponding to the consistent SIM information into a lock state(S412).

Description

Method for securing data in portable device and record media recorded program for realizing the same}

1 is a diagram illustrating a configuration of a WCDMA network to which the present invention is applied.

2 is a block diagram illustrating a configuration of a portable terminal to which the method for securing data stored in the portable terminal according to the present invention is applied.

3 is a flowchart illustrating a sequence of recognizing a subscriber identity module of a mobile terminal to which the method for securing data stored in the mobile terminal according to the present invention is applied.

Figure 4 is a flow chart showing the order in which the stored data security method of the mobile terminal according to an embodiment of the present invention.

The present invention relates to a method for securing stored data of a mobile terminal and a recording medium recording a program for implementing the same. More particularly, the present invention relates to a method for securing data stored in a mobile terminal capable of using both an internal default SIM and an external SIM. It is about.

In the present invention, the portable terminal refers to an electronic device that is formed in a small size to facilitate a user's carrying, so as to perform a mobile communication function, and with the rapid development of digital technology, the portable terminal includes not only a mobile communication terminal but also a personal portable terminal ( Personal Digital Assistant (PDA), Portable Multimedia Player (PMP), etc. may be included. In addition, it may include a computer such as a laptop having a miniaturized and portable including the recent communication function.

The mobile communication service provided through such a mobile terminal may include code division multiple access (CDMA), global system for mobile communication (GSM), international mobile telecommunication (IMT) -2000, and the like according to various classification criteria such as signal transmission method or development time. It may be classified into WCDMA (Wideband CDMA), 1G (Generation), 2G, or 3G.

In order to receive a mobile communication service, a mobile terminal first uses an electronic device for communicating with a base station in an EEPROM (Electrically Erasable Programmable Read Only Memory) inside the mobile terminal in the case of an Advanced Mobile Phone Service (AMP) / Code Division Multiple Access (CDMA) scheme. An electronic serial number (ESN) may be stored or the electronic serial number may be stored in the form of a chip or a card external to the portable terminal and used in combination with the portable terminal.

In addition, in order to receive a mobile communication service, identification information of a mobile communication service subscriber and a mobile network code (MNC), which is a code of a subscribed mobile communication service provider, must be stored, and a device for storing such information as ESN, MNC, or Programs and the like are generally referred to as Subscriber Identity Modules (SIMs).

Such a SIM may be used as a prepaid payment means by storing personal information such as authentication, billing, and security of a subscriber in the form of a chip or a card that can be used in a mobile terminal, and a function that can be recharged and used may be added to the SIM.

Such a SIM is adopted as a standard in the GSM method and the WCDMA method, so that a mobile communication service can be provided by inserting a SIM configured in a card form into a portable terminal.

However, when the SIM is inserted as a standard, when the portable terminal is lost or the SIM is removed from the lost portable terminal without inserting the SIM, data stored in the portable terminal must be exposed to the outside. .

In addition, conventionally, even when reporting a loss of a mobile terminal to a mobile carrier, it is merely to stop providing the mobile communication service. Even though the use of the mobile communication service can be prevented, data stored in the mobile terminal can only be leaked to the outside. There is no problem.

In order to solve the conventional problems as described above, the present invention provides a security method of the stored data of the mobile terminal, which can protect the data stored in the mobile terminal even if the portable terminal is lost while maintaining the standard in the WCDMA or GSM method; It is proposed a recording medium that records a program for implementing the same.

In order to achieve the above object, according to an aspect of the present invention there is provided a storage data security method of a mobile terminal.

According to a preferred embodiment of the present invention, a method for securing data stored in a mobile terminal including an external subscriber identity module (SIM) and a default SIM stored in advance, comprising: receiving a data lock signal from a mobile communication network; Step (a); Determining whether an external SIM is connected (b); (C) reading both information of the external SIM and information of the default SIM when the external SIM is connected, and reading information of the default SIM when the external SIM is not connected; (D) comparing the SIM information included in the data lock signal with the SIM information read in the step (c); And (e) converting the data corresponding to the matched SIM information into a locked state when the read SIM information matches the read SIM information.

In order to achieve the above object, according to another aspect of the present invention there is provided a recording medium for recording a program for implementing a method for securing the storage data of the portable terminal.

According to a preferred embodiment of the present invention, it can be executed by a digital processing device so as to implement a method of security of data stored in a mobile terminal including an external Subscriber Identify Module (SIM) and an unstored default SIM. CLAIMS 1. A recording medium on which a program of instructions is tangibly embodied and which can be read by a digital processing apparatus, comprising: receiving a data lock signal from a mobile communication network; Determining whether an external SIM is connected (b); (C) reading both information of the external SIM and information of the default SIM when the external SIM is connected, and reading information of the default SIM when the external SIM is not connected; (D) reading the SIM information included in the data lock signal and comparing the SIM information read in the step (c); And (e) converting the data corresponding to the matched SIM information into a locked state if the read SIM information matches the read SIM information. A record carrier is provided.

The method of claim 7, wherein

And the data lock signal is a signal generated by including one or more of the external SIM information and the default SIM information.

The default SIM may further include a carrier code, subscriber authentication, and billing information for the mobile communication network.

The mobile communication network may be a mobile communication network of a wideband code division multiple (WCDMA) scheme or a mobile communication network of a global system for mobile communication (GSM) scheme.

In addition, the external SIM may be in the form of a card.

As the invention allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description.

However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

In describing the drawings, similar reference numerals are used for similar elements. In the following description of the present invention, if it is determined that the detailed description of the related known technology may obscure the gist of the present invention, the detailed description thereof will be omitted.

Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

For example, without departing from the scope of the present invention, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component. The term and / or includes a combination of a plurality of related items or any item of a plurality of related items.

When a component is referred to as being "connected" or "connected" to another component, it may be directly connected to or connected to that other component, but it may be understood that other components may be present in between. Should be.

On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that there is no other component in between.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise.

In this application, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art.

Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art, and are not construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, and the same or corresponding components will be denoted by the same reference numerals regardless of the reference numerals and redundant description thereof will be omitted.

The present invention may be applied to a GSM method or a WCDMA method using an external SIM as a standard, but the present invention will be described below based on the WCDMA method.

WCDMA stands for Wideband Code Division Multiple Access and is often referred to as the next generation mobile telecommunication wireless access standard.

In addition, the conventional analog cellular communication system (analog cellular system) is the first generation mobile communication system, currently used (Code Division Multiple Access), GSM (Global System for Mobile communication), PDC (Personal Digital Cellular telecommunication system), US- TDMA (Time Division Multiple Acces) is referred to as a second generation mobile communication system, and a newly developed mobile communication system may be referred to as a third generation mobile communication system.

The third generation system was developed for the purpose of multimedia transmission, and it is distinguished from many existing systems such as high-definition image service and fast data rate.

In particular, WCDMA is the third generation mobile communication system adopted by most countries. Many companies and organizations in Korea, Europe, Japan, the United States, and China have established 3GPP (3'rd Generation Project Group) to establish technical standards. It is developing.

WCDMA has been adopted as a radio access technology for third generation communication in many countries including Europe, Korea, and Japan, and is considered a suitable standard for the purpose of a single radio access standard.

1 is a diagram illustrating a configuration of a mobile communication system using a portable terminal according to an embodiment of the present invention, which illustrates a configuration of a WCDMA mobile communication system adopting a SIM card as a standard.

As shown in FIG. 1, a mobile communication system using a mobile terminal according to an exemplary embodiment of the present invention includes a terminal 100, a base station (BS) 110, a radio network controller (RNC) 120, and an MSC ( Mobile Telephone Switching Center (130), Gateway Mobile Services Switching Center (GMSC) 140, Serving GPRS Support Node (SGSN) 160, Gateway GPRS Support Node (GGSN) 170, and the like.

When the voice call service is to be provided using the mobile terminal 100, the voice call connection is a public telephone exchange network for voice call through the BS 110, the RNC 120, and the MSC 130 and the GMSC 140. It is connected to the Public Switched Telephone Network (PSTN) 150.

On the other hand, the Internet connection is connected to the Internet network 180 through the BS 110, the RNC 120, and the SGSN 160 and the GGSN 170.

The mobile terminal 100 is capable of various digital processing devices as well as a mobile communication terminal, that is, a mobile phone. In particular, the WCDMA method supports high-speed mobility, high voice quality, and is suitable for transmitting a large amount of data by using a spread spectrum method, thereby enabling various applications.

Due to such various application possibilities, the SIM, which is configured in the form of a card, is adopted as a standard so that the SIM can be inserted into various digital processing devices such as mobile phones and laptops to access the WCDMA communication network. Therefore, in the present invention, the mobile terminal 100 may include various digital processing devices.

BS 110 is generally called a base station and transmits and receives signals to or from a mobile terminal.

The RNC 120 is a component of a radio access network that controls a base station. The RNC 120 performs a function for radio resource management, a management of a base station in a wireless communication network, and a management function for a connection between a wireless network controller and another network component.

The MSC 130, also called a mobile switching center or mobile switching center, processes the signals originating or incoming at the base station and adjusts the base station to operate efficiently.

Although not shown in FIG. 1, the MSC 130 manages the location of the mobile terminal and inquires the location registration information of the user to the home location register (HLR) of the subscriber. It informs you of various information such as incoming call status, supplementary services, and subscriber location.

GMSC 140, also called gateway mobile communication switching center, performs an automatic tracking connection function for determining a VMSC (Visited MSC) and selecting a call by referring to the location information stored in the HLR.

GMSC 140 and VMSC may be the same exchange or call exchange on a call-by-call basis.

The MSC 130 and the GMSC 140 are connected to the PSTN 150 via these components as components necessary for a voice call.

The PSTN 150 generally refers to a public switched telephone network operated by a public telecommunications operator, and voice communication is possible through the connection of the PSTN 150 and the GMSC 140.

SGSN 160, also called a packet switched support node, is a node that delivers data packets with a base station within a mobile communication service area.

It has functions such as packet, routing and transmission, mobility management, logical link management, authentication and charging, and the location register (not shown) of SGSN 160 is a General Packet Radio Service (GPRS) user registered with SGSN 160. Stores location information, user profiles and more.

The GGSN 170 is also called a packet gateway support node, and is a node in charge of a connection function between a GPRS backbone network and an external packet data network.

A packet transmitted from the SGSN 160 is converted into an appropriate Packet Data Protocol (PDP) and transmitted, and a PDP address of the incoming packet data is converted into a GSM address. It stores the user's SGSN 160 address and user profile in the location register of SGSN 160 and also performs authentication and charging functions.

In such a WCDMA communication network, various digital processing devices may perform data communication as well as voice calls through communication with the BS 110. To this end, a subscriber identity module (SIM: Subscriber Identity Module or UIM: User Identity Module) in the form of a card storing authentication information, security, and billing information for user identification is adopted as a standard.

The present invention proposes a method capable of protecting data stored in a portable terminal using a portable terminal that meets the standards for applying an external SIM in such a WCDMA communication network and solves the problems of adopting such a standard.

First, with reference to FIG. 2, a configuration of a mobile terminal 100 to which a method of securing data stored in a mobile terminal according to the present invention can be applied will be described.

2 is a block diagram illustrating a configuration of a mobile terminal 100 to which the method for securing data stored in the mobile terminal according to the present invention is applied.

As shown in FIG. 2, the mobile terminal 100 according to an exemplary embodiment of the present invention includes an input unit 200, a display unit 210, a transceiver unit 220, a controller unit 230, a storage unit 240, It may include a default SIM 250, a sound output unit 260, an external SIM interface unit 270, the external SIM interface unit 270 is connected to the SIM card 280 in the form of an external card.

The input unit 210 is a means for receiving a control command, a function selection command, or the like for controlling the operation of the mobile terminal 100 from the user. For example, the input unit 210 may include a plurality of key buttons (for example, numeric / character keys, a symbol key of * or #, one or more function keys (for example, a menu key, a call key, a confirmation key, and a wireless Internet). Key for connection) or a touch screen.

The display unit 210 performs a function of displaying image data, image data, text data, numeric data, and the like under the control of the controller 230. For example, the display unit 210 may be a liquid crystal display (LCD).

The transceiver 220 transmits a communication network access request message to the base station 110 of the WCDMA communication network and connects the mobile terminal 100 to the WCDMA communication network. In addition, the transceiver 230 receives a call signal through the base station 110 to enable voice call and data communication through the mobile terminal 100.

The control unit 230 is a component of the mobile terminal 100 according to the present invention (for example, the input unit 200, the display unit 210, the transceiver 220, the storage unit 240, the default (default) SIM 250, sound output unit 260, external SIM interface unit 270). When the connection of the SIM is recognized by the external SIM interface unit 270, the controller 230 reads information stored in the external SIM and generates a network connection request message. On the other hand, when the SIM 280 is not connected to the external SIM interface unit 270, information stored in the default SIM 250 is read to generate a network connection request message.

Meanwhile, the generated network access request message is transmitted to the transceiver 220 and transmitted to the communication network (more specifically, the base station 110).

The storage unit 240 may store data related to a communication service, an operation program of the mobile terminal 100, a set algorithm, and the like under the control of the controller 230.

The default SIM 250 is a subscriber identification module that stores authentication, billing, and security information of a communication service subscriber.

In addition, the subscriber identification module may store a carrier code (MNC: Mobile Network Code) that is information for defining a carrier, and is embedded in the form of a chip or card in the portable terminal 100 or in the form of a program. ) Can be installed.

A subscriber identity module (SIM: Subscriber Identity Module or UIM: User Identity Module) is a card or a built-in module that can be generally used in a mobile communication terminal so that subscribers can provide various information such as authentication, billing, and security information. Chip or program that stores information.

As described above, in a mobile communication method such as WCDMA or GSM, a SIM external to a card form is adopted as a standard, and thus, the mobile terminal does not include a SIM as a default value.

On the other hand, the portable terminal 100 to which the present invention can be applied includes an interface for inserting an external SIM such as a standard in the WCDMA or GSM scheme, and also adds a default SIM 250 to the portable terminal 100. Include.

By further including such a default SIM 250, not only the communication service using the mobile terminal can be provided by inserting the SIM according to the standard of the mobile communication technology, but also the mobile communication service can be provided using the built-in default SIM 250. It may be.

The sound output unit 260 is a means for outputting a communication service provided through the mobile terminal, for example, a voice call, a sound received in response to data communication, a sound stored in the storage unit 240 of the mobile terminal 100, and the like. to be. For example, the sound output unit 260 may include a sound source chip, for example, may be a speaker.

The external SIM interface unit 270 is connected to the SIM 280 to read information stored in the SIM 280. When the SIM 280 is inserted into the external SIM interface unit 270, the external SIM interface unit 270 may transmit a predetermined interrupt signal to the controller 230. The controller 230 determines the interrupt signal input from the external SIM interface unit 270, recognizes that the SIM 280 is inserted into the external SIM interface unit 270, and not the default SIM 250, but the external SIM 280. Reads information necessary for generating a network access request message.

The SIM 280 is a subscriber identity module in the form of an external card adopted as a standard in the WCDMA or GSM scheme. As described above, the information stored in the SIM 280 may store various information such as authentication, billing, and security information of the subscriber.

The order in which each SIM is recognized in the mobile terminal 100 further including a built-in default SIM 250 in addition to the SIM 280 external to the communication network adopting such a SIM will be described with reference to FIG. 3.

3 is a flowchart illustrating a sequence in which a subscriber identification module (SIM) of the mobile terminal 100 is recognized according to an exemplary embodiment of the present invention.

As shown in FIG. 3, first, it is recognized whether an external SIM 280 is inserted and connected to the mobile terminal 100 (S300). As described above, the connection of the external SIM 280 is recognized by transmitting an interrupt signal due to the connection of the external SIM 280 from the external SIM interface unit 270 to the control unit 230.

When the connection of the external SIM 280 is not recognized, information (for example, authentication information, security information, billing information, etc.) necessary for accessing a communication network is read from the built-in default SIM 250 (S302).

On the other hand, if the connection of the external SIM 280 is recognized, the external SIM 280 reads information (for example, authentication information, security information, billing information, etc.) necessary for accessing the communication network (S304).

A network connection request message is generated using the read information (S306), and the generated request message is transmitted to the base station 110 of the communication network, so that the connection is performed to the voice call or the internet network, respectively, as shown in the communication system of FIG. (S308).

In the present invention, when the user loses the portable terminal 100 using the portable terminal 100 having such a configuration, the holder of the portable terminal 100 connects to a specific server by himself or the mobile terminal 100 to the mobile communication company. By activating the lock function to the data stored in the mobile terminal 100 through the loss report of the other person who has acquired the mobile terminal 100 can not confirm the data stored in the mobile terminal 100.

The transmission of the data lock signal through the communication network may be performed by a method in which a user directly accesses a specific server, enters lost information, or reports a loss through a mobile communication company.

First, a user may access a specific server and input pre-built default SIM 250 information of the mobile terminal. The specific server receiving the default SIM 250 information retrieves the connection information of the default SIM 250 of the lost portable terminal 100 through the communication network devices of the mobile carrier and transmits the information to transmit the data lock signal. .

In addition, even when a loss report is made through the mobile communication company, the data lock signal may be transmitted by inputting unique default SIM 250 information of the lost portable terminal.

On the other hand, when entering lost information, the user can enter the external SIM information of the mobile carrier subscribed to.

As described above, since the external SIM 280 is a standard in a standard such as a WCDMA network, when the external SIM 280 is removed, the mobile communication service provider cannot track the location or information of the mobile terminal 100, but the external SIM 280 If this is not removed, it may occur sufficiently, so that both the information of the external SIM 280 and the default SIM 250 can be input.

With reference to FIG. 4, the procedure of the security method for data stored in the mobile terminal 100 according to the present invention is performed by the loss report or the input of the lost information.

First, in the standby mode state in which the portable terminal 100 is turned on (S400), when the portable terminal 100 receives a data lock signal through a communication network based on the external SIM 280 as in the WCDMA network described above with reference to FIG. 1 (S402). In operation S404, it is determined whether the external SIM 280 is connected to the mobile terminal 100.

If the external SIM 280 is not connected, information stored in the default SIM 250 is read (S406). If the external SIM 280 is connected, the information stored in the external SIM 280 and the default SIM ( The information stored in 250 is read together (S408).

Meanwhile, information read from each SIM is compared with SIM information included in the received data lock signal (S410), and data corresponding to SIM information of the received data lock signal is converted into a locked state (S412).

Thereafter, it is determined whether the user information confirmation key is input through the mobile terminal 100 (S414). If the correct user information confirmation key is input, the data corresponding to the user of the default SIM 250 or the external SIM 280 is locked. Release the state (S416).

As described above, since the external SIM is adopted as a standard in the WCDMA network, a plurality of portable terminals can be used. In addition, it is possible to change the mobile carrier that provides communication services by replacing only the external SIM.

Therefore, the data stored in the mobile terminal may vary according to the SIM. Therefore, instead of locking all the data of the mobile terminal, the data input is divided according to the external SIM or the default SIM to lock the data only. Can be done.

Preferred embodiments of the present invention described above are disclosed for purposes of illustration, and those skilled in the art will be able to make various modifications, changes, and additions within the spirit and scope of the present invention. Additions should be considered to be within the scope of the following claims.

As described above, according to the present invention, a method of securing the stored data of a mobile terminal and a recording medium recording a program for implementing the same, according to the present invention, maintains the standard in the WCDMA or GSM scheme, but is illegal in the mobile communication service when the mobile terminal is lost. There is an effect that can prevent the use.

In addition, there is an advantage that can protect the data stored in the portable terminal even if the portable terminal is lost.

Claims (12)

In the security method of data stored in a mobile terminal including an external Subscriber Identify Module (SIM) and a default SIM stored in advance, Receiving a data lock signal from a mobile communication network (a); Determining whether an external SIM is connected (b); (C) reading both information of the external SIM and information of the default SIM when the external SIM is connected, and reading information of the default SIM when the external SIM is not connected; (D) comparing the SIM information included in the data lock signal with the SIM information read in the step (c); And And (e) converting the data corresponding to the matched SIM information into a locked state when the read SIM information matches the read SIM information. The method of claim 1, And the data lock signal is a signal generated by including at least one of the external SIM information and the default SIM information. The method of claim 1, The default SIM further comprises a service provider code, subscriber authentication, billing information for the mobile communication network. The method of claim 1, The mobile communication network is a mobile communication network of a wideband code division multiple (WCDMA) method. The method of claim 1, The mobile communication network is a stored data security method of a mobile terminal, characterized in that the mobile communication network of the GSM (Global System for Mobile communication). The method of claim 1, The external SIM is stored data security method of a portable terminal, characterized in that the card form. In order to implement a security method of data stored in a mobile terminal including an external Subscriber Identify Module (SIM) and an unstored default SIM, a program of instructions that can be executed by the digital processing device is tangibly implemented and digitally implemented. A recording medium on which a program can be read by a processing apparatus, the recording medium comprising: Receiving a data lock signal from a mobile communication network (a); Determining whether an external SIM is connected (b); (C) reading both information of the external SIM and information of the default SIM when the external SIM is connected, and reading information of the default SIM when the external SIM is not connected; (D) reading the SIM information included in the data lock signal and comparing the SIM information read in the step (c); And And (e) switching the data corresponding to the matched SIM information to a locked state if the read SIM information matches the read SIM information. media. The method of claim 7, wherein And the data lock signal is a signal generated by including one or more of the external SIM information and the default SIM information. The method of claim 7, wherein The default SIM further includes a carrier code, subscriber authentication, and billing information for the mobile communication network. The method of claim 7, wherein The mobile communication network is a recording medium for recording a program for implementing a method of securing data stored in a portable terminal, characterized in that the mobile communication network of the Wideband Code Division Multiple (WCDMA) system. The method of claim 7, wherein The mobile communication network is a recording medium for recording a program for implementing a method of securing data security of a mobile terminal, characterized in that the GSM (Global System for Mobile communication) mobile communication network. The method of claim 7, wherein The external SIM is a recording medium that records a program for implementing a method of securing the storage data of the portable terminal, characterized in that the card form.

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