KR101034672B1 - Method and system for subscriber authentication using disposable usim card - Google Patents

Abstract

The present invention relates to a subscriber authentication method and system using a disposable USIM card.

According to the present invention, the authentication center according to an embodiment of the present invention to perform the subscriber authentication of the mobile terminal using a disposable USIM card, if the subscriber authentication request is received from the mobile terminal extracts the subscriber information is a legitimate authentication request? Check it. If the verification result is a legitimate request, the authentication key for the one-time USIM card is encrypted and transmitted, and upon receiving the subscriber approval request through the authentication key from the mobile terminal, the one-time USIM card is activated, and the USIM card being used. Lock it to stop using it.

Thus, according to an embodiment of the present invention, if a subscriber needs to make a call through his or her subscriber number without carrying a terminal, the disposable USIM card may be attached to another user's terminal to perform a simple authentication procedure. There is.

Disposable USIM, Certification, Certification Center, Certification

Description

METHOD AND SYSTEM FOR SUBSCRIBER AUTHENTICATION USING DISPOSABLE USIM CARD}

The present invention relates to a subscriber authentication method and system using a disposable USIM card. In particular, the present invention is to provide a method and system for performing subscriber authentication and providing a mobile communication service through a mobile terminal equipped with a disposable USIM card.

Universal subscriber identity module (USIM) card combines subscriber identity module (SIM) card with subscriber information and universal IC card (UICC) to implement various functions such as user authentication, global roaming, and e-commerce on one card. Say what you did.

In general, the USIM card is used for the Universal Mobile Telecommunication System (UMTS), a third-generation communication service that can transmit broadband packet-based text, digitized voice or video, and multimedia data at a high speed of 2Mbps or more wherever a portable terminal or computer user is located in the world. The smart card to apply is a kind. Therefore, the 3G mobile terminal is used and mounted, the mobile terminal is not attached to the USIM card is blocked all functions other than emergency calls.

The USIM card is designed to control subscriber access to a mobile communication service, and is responsible for authenticating a subscriber or ensuring that billing is accurately made for the amount of calls used by the subscriber. To this end, the USIM card includes an integrated circuit card ID (ICC-ID), an international mobile station identity (IMSI), which is an identification number assigned to a USIM by a mobile operator, and a mobile terminal is a mobile communication network. Subscriber authentication information such as an authentication key value for accessing the service information.

A subscriber who receives and owns a USIM card from a mobile communication company can use the mobile terminal normally by simply attaching his or her own USIM card to the mobile terminal regardless of the path. That is, it is possible to use a plurality of terminals as a replacement with one acquired USIM card. Therefore, the concept of owning a mobile terminal such as a conventional mobile phone is gradually changing to owning a USIM.

On the other hand, if the user does not have his or her mobile terminal with a USIM card attached, or if he / she needs to make an urgent call through his / her subscription number, or if an important call is expected to his / her phone number Can be.

In this case, a new USIM card can be purchased and registered and used, but a problem of wasting resources due to an increase in subscriber costs due to the purchase of an expensive USIM card, and the previously used USIM card is discarded. In addition, the registration process of the new USIM card is complicated, there is a problem causing inconvenience to the user because it can not be registered immediately when the business hours of the telecommunications operators are terminated.

Therefore, the present invention is to solve the above problems by providing a disposable USIM card to perform a user authentication through a mobile terminal equipped with a disposable USIM card and to provide a method and system for providing a certain amount of mobile communication services accordingly will be.

In order to solve the above technical problem, a mobile terminal using a disposable USIM card according to an embodiment of the present invention to perform subscriber authentication,

a) recognizing the disposable USIM card attached and receiving information for subscriber authentication; b) requesting subscriber authentication to the authentication center based on the subscriber information; And c) obtaining an authentication key according to user authentication of the authentication center, and requesting subscriber approval based on the authentication key.

On the other hand, the authentication center according to an embodiment of the present invention the method for performing subscriber authentication of a mobile terminal using a disposable USIM card,

a) extracting the subscriber information and receiving the subscriber authentication request from the mobile terminal to confirm whether the authentication request is legitimate; b) encrypting and transmitting the authentication key for the disposable USIM card when the verification result is a legitimate request; And c) activating the disposable USIM card upon receiving a subscriber approval request through the authentication key from the mobile terminal, and locking the existing USIM card to stop using it.

On the other hand, the system for performing subscriber authentication of a mobile terminal using a disposable USIM card according to an embodiment of the present invention,

A communication unit which receives a subscriber authentication request message from the mobile terminal; A message analyzer extracting subscriber information by analyzing the subscriber authentication request message; An authentication processing unit for comparing the subscriber information with the subscriber information being pre-stored and managed to confirm whether it is a legitimate authentication request, and encrypting an authentication key corresponding to the disposable USIM identification information to generate an authentication value; A counter unit for counting service valid information of the disposable USIM card and notifying the authentication processing unit when the service valid information expires; A storage unit for storing at least one of subscriber information, a USIM table, subscriber authentication information, the disposable USIM card identification information, service validity information of the disposable USIM card, and service usage information of a carrier; And a controller configured to determine data according to service use of the mobile terminal and store the data in the storage unit.

According to the embodiment of the present invention by the above-described configuration, if a subscriber needs to make a call through his or her subscriber number in a state in which the terminal (including the USIM) is lost and not carried, a simple authentication by attaching a disposable USIM card to another person's terminal There is an effect that can be used after performing the procedure.

In addition, by purchasing a disposable USIM card through a general store such as a convenience store, and performing authentication through a mobile terminal attached thereto, the subscriber authentication procedure can be minimized, and the user's approval can be obtained without the help of a communication service provider.

Furthermore, even if the subscriber does not carry his terminal when traveling or traveling abroad, it is possible to expect the effect of improving the convenience of the subscriber by attaching and using a disposable USIM card to the mobile terminal rented at the business trip or travel destination.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

Throughout the specification, when a part is said to "include" a certain component, it means that it can further include other components, without excluding other components unless specifically stated otherwise. In addition, the terms “… unit”, “… unit”, “module”, etc. described in the specification mean a unit that processes at least one function or operation, which may be implemented by hardware or software or a combination of hardware and software. have.

In this specification, a mobile station (MS) is a terminal, a mobile terminal (MT), a subscriber station (SS), a portable subscriber station (PSS), a user device (User). It may also refer to an Equipment (UE), an Access Terminal (AT), or the like, and may include all or some functions of a mobile terminal, a subscriber station, a portable subscriber station, a user device, and the like.

In the present specification, a base station (BS) is an access point (AP), a radio access station (Radio Access Station, RAS), a Node B (Node B), a base transceiver station (Base Transceiver Station, BTS), MMR ( Mobile Multihop Relay) -BS and the like, and may include all or part of functions such as an access point, a radio access station, a Node B, a base transceiver station, and an MMR-BS.

Now, a subscriber authentication method and system using a disposable USIM card according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 schematically illustrates the configuration of a subscriber authentication system using a disposable USIM card according to an embodiment of the present invention.

Referring to FIG. 1, a subscriber authentication system using a disposable USIM card according to an embodiment of the present invention may be freely purchased at a general store such as a convenience store, a disposable USIM card 10, a mobile terminal 100, and an exchanger 200. And an authentication center 300.

The mobile terminal 100 recognizes the attached disposable USIM card 10 and requests subscriber authentication and use approval accordingly, and the exchange 200 sends a message for interworking between the mobile terminal 100 and the authentication center 300. To process

Authentication center (AuC) 300 may also be referred to as an authentication server and provides an authentication value according to the subscriber authentication request, and approves the use of the disposable USIM card 10 according to the subscriber authentication success, It serves to manage service valid information about the use of the USIM card 10.

On the other hand, Figure 2 is a block diagram schematically showing the structure of a disposable USIM card and a mobile terminal according to an embodiment of the present invention.

Referring to FIG. 2, the disposable USIM card 10 according to an exemplary embodiment of the present invention includes information for initial operation of the mobile terminal 100 to which a predetermined memory is attached (mounted) and information for accessing a network. Contains USIM unique information, including. Here, the information for network access includes one-time USIM identification information and preset service valid information such as service time or service frequency. Here, the service valid information means valid permission information such as a service (use) available time (period) or the number of available times of the disposable USIM card 10.

The mobile terminal 100 includes a communication unit 110, a display unit 1220, an input unit 130, a storage unit 140, a USIM interface unit 150, and a controller 160.

The communication unit 110 transmits and receives signals for functions such as voice and video calls and data communication of the mobile terminal 100 through an antenna interworking with a base station (not shown), and transmits and receives information for subscriber authentication. It plays a role.

The display unit 120 may be configured as a display element such as a liquid crystal display (LCD) or an organic light emitting diode (OLED), and visually displays status information according to the operation of the mobile terminal 100. It serves as a mark.

The input unit 130 includes a numeric key, a special character key, an alphabetic key, a Hangul alphabet key, a function key, and the like, and performs a function of receiving a subscriber's instruction and transmitting the received instruction to the controller 160. The input unit 130 may be configured as a keypad or a touch screen together with the display unit 120.

The storage unit 140 stores an operating system (OS) for driving the mobile terminal 100, programs according to various functions, and variables or state information generated during an operation of the mobile terminal 100. In particular, the storage 140 stores a program for subscriber authentication according to the mounting of the disposable USIM 10, and includes a flash memory, a random access memory (RAM), and an electrically read and programmable read. Only Memory: EEPROM).

The USIM interface unit 150 recognizes the detachable USIM card 10 and reads USIM unique information from the attached USIM card 10 and transmits the unique information to the control unit 160.

The controller 160 identifies the disposable USIM card 10 according to USIM unique information transmitted from the USIM interface unit 150 and provides a subscriber information input menu as an initial operation. And, as shown in Figure 3 and receives the authentication information from the subscriber.

3 illustrates a state in which the mobile terminal 100 displays the subscriber authentication information menu through the display unit 120 according to an embodiment of the present invention.

Referring to FIG. 3, the mobile terminal 100 according to an embodiment of the present invention displays USIM identification information read from the disposable USIM card 10 through a subscriber authentication information menu, and the subscriber's telephone number and social security number. Get input. At this time, the USIM identification information may include an identification code (eg, Onetime, OT) indicating that the USIM is a one-time appointment, and may recognize that the devices encountering this are one-time and perform a corresponding operation. In addition, although omitted in the drawing, the subscriber can further receive a service password registered in advance with the service provider to prevent another person from stealing the subscriber information.

The controller 160 generates a subscriber authentication request message from the received subscriber information, USIM unique information, and terminal unique information, requests the authentication center 300, calculates an encrypted authentication value received from the authentication center 300, and authenticates the authentication. Obtain the key. In addition, the controller 160 stores the calculated (verified) authentication key when it corresponds to a key value corresponding to the disposable USIM card 10, and sends the disposable USIM card 10 to the authentication center 300 through the authentication value and the authentication key. ) To request the approval of use. In addition, the authentication key is used for the mobile terminal 10 to access the mobile communication network.

4 is a block diagram schematically illustrating a configuration of an authentication center according to an exemplary embodiment of the present invention.

Referring to FIG. 4, the authentication center 300 according to an embodiment of the present invention may include a communication unit 310, a message analysis unit 320, an authentication processing unit 330, a counter unit 340, and a storage unit 350. And a controller 360.

The communication unit 310 performs communication for interworking with an exchanger, a home location register (HLR), a visitor location register (VLR), and the like according to a subscriber authentication request of the mobile terminal 100. It is responsible for receiving information.

The message analyzer 320 analyzes the received subscriber authentication request, and extracts subscriber information including at least one of disposable USIM identification information, a terminal unique number, a subscriber number, a social security number, and a password.

The authentication processor 330 compares the subscriber information with the subscriber information that is previously stored and managed to confirm whether the subscriber is a legitimate subscriber, and generates an authentication value by encrypting an authentication key corresponding to the disposable USIM identification information.

Here, the authentication key can be obtained by querying the disposable USIM identification information from the disposable USIM table stored in the storage 350 to obtain a corresponding authentication key.

The USIM identification information is unique identification information given to the disposable USIM card 10, and the authentication center 300 policyly stores and receives the disposable USIM table when the disposable USIM card is shipped. The disposable USIM table may include preset service valid information such as USIM identification information, authentication key, production information, and service time or service number of each card. Therefore, if necessary, the authentication center 300 may query the disposable USIM table to extract various information corresponding to the disposable USIM card 10.

On the other hand, even if the authentication key is not previously matched with USIM identification information because there is no USIM table, the authentication processing unit 330 simply combines USIM identification information and subscriber information to generate an authentication key corresponding to the USIM identification information. can do.

The authentication processing unit 330 transmits the authentication value to the mobile terminal 100, while the mobile terminal 100 calculates the authentication value and requests the subscriber approval through the authentication key, thereby approving it and using a disposable USIM card ( 10) Activate.

At this time, the authentication processing unit 330 retrieves the USIM card that is being used on the basis of the subscriber information, and locks it for a one-time USIM card 10 activation period (Lockup) to stop using.

The counter 340 counters the activation time (period) and the number of services based on the preset service valid information and informs the authentication processing unit 330 when the service valid information expires.

The storage unit 350 stores subscriber information, subscriber authentication information, USIM identification information, service validity information of the disposable USIM card, service usage information, and the like of the corresponding carrier.

The controller 360 controls the operations of each unit 310 to 350 for driving the authentication center 300, and stores the service usage data through the disposable USIM card 10 of the subscriber and stores the data in the storage unit 350. . The service usage data may be used later as billing information for the subscriber. Therefore, the billing information according to the use of the service through the disposable USIM card 10 is preferably billed as a post-payment when the subscriber billing of the period.

On the other hand, with reference to Figure 5 describes a subscriber authentication method using a disposable USIM card according to an embodiment of the present invention.

5 is a flowchart illustrating a subscriber authentication method using a disposable USIM card according to an embodiment of the present invention.

Referring to FIG. 5, when a user needs to make a call to his / her subscriber number without losing or carrying his terminal, the disposable USIM card 10 is provided to the mobile terminal 10 borrowed or rented by another person. Attach (S501).

The mobile terminal 100 recognizes the disposable USIM card 10 to be attached (S502), obtains unique USIM information, and receives subscriber authentication information for use of the disposable USIM card 10 (S503).

The mobile terminal 100 generates a subscriber authentication request message based on the entered subscriber information and transmits it to the exchange 200 (S504), and the exchange 200 transmits it to the authentication center 300 (S505). Here, the subscriber information may be encrypted and transmitted, and may include at least one of disposable USIM unique information, terminal unique number, subscriber number, social security number, and password.

When the authentication center 300 receives the subscriber authentication request message, the authentication center 300 analyzes the received message to obtain the subscriber information. Then, the subscriber information is compared with the subscriber information that is previously stored and managed to determine whether the subscriber is a legitimate subscriber or legitimate use (S507). For example, the authentication center 300 compares the subscriber number, social security number, and password of the subscriber who is previously stored and managed to determine whether the user is justified, and the disposable USIM card 10 which can be used by comparing the USIM unique information with the previously stored USIM table. I can understand it.

The authentication center 300 generates an authentication failure message of the subscriber when the determination result of step S507 is not justified, and responds to the mobile terminal 100 through the corresponding switch 200 (S508 and S509).

On the other hand, if the authentication center 300 is determined to be a legitimate subscriber (user) as a result of the determination in step S507 to generate an authentication value by encrypting the authentication key (Key) corresponding to the disposable USIM identification information (S510), carrying the subscriber The authentication response (ack) message is transmitted to the exchange 200 (S511). The exchange 200 stores the authentication value (S512), and transmits a subscriber authentication response message to the mobile terminal 100 (S513).

The mobile terminal 200 calculates the authentication value of the received subscriber authentication response message, solves the password, verifies it, and obtains an authentication key (S100). That is, the mobile terminal 200 shares an authentication key (secret key) for authentication and use of the disposable USIM card 10 with the authentication center 300 according to a predetermined algorithm.

Subsequently, the mobile terminal 100 requests the subscriber approval by carrying the authentication value and the authentication key, and the exchange 200 receives the subscriber approval request to the authentication center 300 by comparing with the stored authentication value. S517).

The authentication center 300 receives the subscriber approval request, verifies through the authentication value and the authentication key, and activates the disposable USIM card 10 to approve the use (S518).

In addition, the authentication center 300 locks the existing USIM card of the subscriber (Lockup) at the same time as activating the disposable USIM card 10 (S519).

Meanwhile, a service method using a disposable USIM card according to an embodiment of the present invention will be described with reference to FIGS. 6 and 7.

First, FIG. 6 is a flowchart illustrating a service method using a disposable USIM card according to the first embodiment of the present invention.

Referring to FIG. 6, the mobile terminal 100 to which the disposable USIM card 10 is attached according to the first embodiment of the present invention completes the subscriber authentication to the authentication center 300 through the process as shown in FIG. 5. In this state, it is assumed that the service valid information is the number of times.

The mobile terminal 100 receives an incoming call number according to the activation of the disposable USIM card 10 and attempts to make an outgoing call (S601).

The exchange 200 transmits the counter information according to the transmission attempt of the mobile terminal 100 to the authentication center 300 (S602).

When receiving the counter information from the switch 200, the authentication center 300 operates the counter register of the counter unit 340 (S603), and decreases the number of service valid counters by 1 according to the time stamp included in the counter information. (S604).

Then, the authentication center 300 determines whether there is a remaining service valid counter number of the disposable USIM card 100 (S605), and if there is a remaining counter number, and transmits the service activation information to the exchange 200 (S606). .

The exchange 200 performs a process for setting up a call such as a location inquiry of the called terminal and a call request to the called exchange according to the service activation (valid) information (S607). Report to the center 300 (S608).

The authentication center 300 grasps the remaining number of counters (S609) and transmits it to the mobile terminal 100 (S610). For example, if the number of service valid times of the mobile terminal 100 is 10, the number of remaining service valid times may be reduced to 1 when the first call is made.

On the other hand, if there are no remaining counters in step S605, the disposable USIM is discarded (deactivated) (S611), and authentication (service) expiration information is transmitted to the mobile terminal 100 (S612). In addition, the authentication center 300 releases the existing USIM that is locked at the same time as the authentication expires and resumes use (S613).

Next, FIG. 7 is a flowchart illustrating a service method using a disposable USIM card according to a second embodiment of the present invention.

Referring to FIG. 6, the service method using the disposable USIM card 10 according to the second embodiment of the present invention is similar to the first embodiment of FIG. 6, except that it is assumed that the service valid information is time. different.

That is, the mobile terminal 100 receives an incoming telephone number according to the activation of the disposable USIM card 10 and attempts to make an outgoing call (S701), and the exchange 200 transmits the counter information according to the outgoing attempt to the authentication center. (S702).

When receiving the counter information from the exchange 200, the authentication center 300 operates the counter register of the counter unit 340 (S703). At this time, although omitted in the drawing, when the mobile terminal 100 is the first call using the disposable USIM, a time stamp is registered to count a preset time (S704). For example, if the service validity time is 2 hours, it can be countered so that it can be notified when the predetermined time expires.

Then, the authentication center 300 determines whether there is a remaining service valid counter time of the disposable USIM card 100 (S705), and if there is a remaining counter time, transmits the service activation information to the exchange 200 (S706). ).

The exchange 200 performs a process for setting up a call such as a location inquiry of the called terminal and a call request to the called exchange according to the service activation (valid) information (S707). Report to the authentication center (300) (S708).

The authentication center 300 grasps the remaining counter time when the call is terminated with the remaining counter time (S709) and transmits it to the mobile terminal 100 (S710).

On the other hand, if there is no counter time remaining in step S705, the disposable USIM is discarded (deactivated) (S711), and the authentication (service) expiration information is transmitted to the mobile terminal 100 (S712). In addition, the authentication center 300 releases the existing USIM that is locked at the same time as the authentication expires and resumes use (S713).

As such, according to an embodiment of the present invention, when a subscriber needs to make a call through his or her subscriber number in a state in which the subscriber (including the USIM) is lost and not carried, the disposable USIM card 10 may be attached to another person's terminal. There is an effect that can be used after performing the authentication procedure.

In particular, by purchasing a disposable USIM card 10 through a general store such as a convenience store and performing authentication through the attached mobile terminal 100, the subscriber authentication process can be minimized, and the user can receive approval without the help of a communication service provider. There is an advantage that the convenience of the improvement.

Furthermore, even if the subscriber does not carry his terminal when traveling or traveling abroad, it is possible to expect the effect of attaching the disposable USIM card 10 to the mobile terminal 100 rented at the business trip or travel destination.

Although the embodiments of the present invention have been described above, the present invention is not limited only to the above embodiments, and various other changes are possible.

For example, in the above-described embodiment of the present invention, the service data used for the disposable USIM card 10 is set as the number or time (period) of the service data used for the predetermined number and the period. However, the present invention is not limited thereto, and the service valid information is limited to a predetermined amount or data (for example, a packet) amount and charged at the time of purchase of the disposable USIM card 10, and determined according to the service valid information defined in the authentication center 300. There is an advantage that can be charged in advance by providing a service only for a certain amount or data.

The embodiments of the present invention are not limited to the above-described apparatuses and / or methods, but may be implemented through a program for realizing functions corresponding to the configuration of the embodiment of the present invention, a recording medium on which the program is recorded And such an embodiment can be easily implemented by those skilled in the art from the description of the embodiments described above.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

1 schematically illustrates the configuration of a subscriber authentication system using a disposable USIM card according to an embodiment of the present invention.

Figure 2 is a block diagram schematically showing the structure of a disposable USIM card and a mobile terminal according to an embodiment of the present invention.

3 illustrates a state in which the mobile terminal 100 displays the subscriber authentication information menu through the display unit 120 according to an embodiment of the present invention.

4 is a block diagram schematically illustrating a configuration of an authentication center according to an embodiment of the present invention.

5 is a flowchart illustrating a subscriber authentication method using a disposable USIM card according to an embodiment of the present invention.

6 is a flowchart illustrating a service method using a disposable USIM card according to the first embodiment of the present invention.

7 is a flowchart illustrating a service method using a disposable USIM card according to a second embodiment of the present invention.

Claims (14)

In the mobile terminal using a disposable USIM card to perform subscriber authentication, a) recognizing the disposable USIM card attached and receiving information for subscriber authentication; b) requesting subscriber authentication to the authentication center based on the subscriber information; And c) acquiring an authentication key according to subscriber authentication of the authentication center and requesting subscriber approval based on the authentication key; Including, The subscriber information, Subscriber authentication method comprising at least one of one-time USIM unique information, unique number of the mobile terminal, subscriber number, social security number and password. The method of claim 1, Step a) is Determining that the disposable USIM card is a disposable USIM card according to the unique USIM information; And Receiving at least one of a subscriber's telephone number, social security number and password through the subscriber information input menu, wherein the password means a registered number from the subscriber when the service is subscribed to a telecommunications company; Subscriber authentication method comprising a. The method according to claim 1 or 2, C), Receiving an encrypted authentication value from the authentication center; And And storing the authentication key obtained by decrypting the authentication value. The method of claim 3, wherein After step c), And when the subscriber approval is completed, the mobile terminal is activated for a predetermined number of times or for a predetermined time according to the service valid information of the disposable USIM card. delete In the method for the authentication center performs subscriber authentication of the mobile terminal using a disposable USIM card, a) extracting the subscriber information and receiving the subscriber authentication request from the mobile terminal to check whether it is a legitimate authentication request; b) encrypting and transmitting the authentication key for the disposable USIM card when the verification result is a legitimate request; And c) activating the disposable USIM card upon receiving a subscriber approval request through the authentication key from the mobile terminal, and locking the existing USIM card to stop using it; Subscriber authentication method comprising a. The method of claim 6, Step a) is Checking whether the disposable USIM card is in a usable state by querying a USIM table in which unique information of the shipped USIM is stored; And Confirming whether the subscriber is a legitimate subscriber based on at least one of the subscriber's telephone number, social security number and password, wherein the password means a registered number from the subscriber at the time of joining the service to the telecommunications company; Subscriber authentication method comprising a. The method of claim 7, wherein The authentication key, Subscriber authentication method, characterized in that obtained through the preset USIM table or generated based on the identification information of the disposable USIM card. 8. The method according to claim 6 or 7, After step c), d) receiving counter information according to an attempt to make a call by the mobile terminal; e) reducing service validity information of the disposable USIM card based on the counter information; f) discarding the disposable USIM card when the service validity information of the disposable USIM card expires, and activating the existing USIM card to be usable. Subscriber authentication method further comprising. The method of claim 9, The service valid information, And at least one of the number of calls and a service valid time (period). In the system for performing subscriber authentication of a mobile terminal using a disposable USIM card, A communication unit which receives a subscriber authentication request message from the mobile terminal; A message analyzer extracting subscriber information by analyzing the subscriber authentication request message; An authentication processing unit for comparing the subscriber information with the subscriber information being pre-stored and managed to confirm whether it is a legitimate authentication request, and encrypting an authentication key corresponding to the disposable USIM identification information to generate an authentication value; A counter unit for counting service valid information of the disposable USIM card and notifying the authentication processing unit when the service valid information expires; A storage unit for storing at least one of subscriber information, a USIM table, subscriber authentication information, the disposable USIM card identification information, service validity information of the disposable USIM card, and service usage information of a carrier; And A control unit which grasps data according to service use of the mobile terminal and stores the data in the storage unit; Subscriber authentication system comprising a. The method of claim 11, The authentication processing unit, And transmitting the authentication value and receiving the subscriber approval request through the authentication key from the mobile terminal, activating the disposable USIM card and locking the existing USIM card to stop the use. 13. The method of claim 12, The authentication processing unit, And discarding the disposable USIM card when the service valid information of the disposable USIM card expires, and activating the existing USIM card to be usable. 13. The method of claim 12, The control unit, Subscriber authentication system characterized in that the service usage information is charged to the subscriber in a postpaid.

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