KR100959720B1

KR100959720B1 - Security method for subscriber identity module card mounted on mobile communication terminal

Info

Publication number: KR100959720B1
Application number: KR1020030030656A
Authority: KR
Inventors: 강창수
Original assignee: 엘지전자 주식회사
Priority date: 2003-05-14
Filing date: 2003-05-14
Publication date: 2010-05-25
Also published as: KR20040098339A

Abstract

The present invention relates to a security method of a subscriber identity module card mounted in a mobile communication terminal, and in the related art, when a subscriber identity module card is lost, there is a problem of exposing personal information and credit information to an unspecified number. In consideration of such a problem, the present invention includes the steps of: turning on / off the operation of the subscriber identity module card by determining whether the type of the short message received is a message controlling the operation of the subscriber identity module card among messages related to electronic commerce security; If the user requests the operation of the subscriber identity module card in the state in which the operation of the subscriber identity module card is stopped, the step of determining whether to operate the subscriber identity module card by checking the identity of the user is performed. In this case, it is possible to block the e-commerce operation from the outside and prevent the leakage of personal and credit information.

Description

SECURITY METHOD FOR SUBSCRIBER IDENTITY MODULE CARD MOUNTED ON MOBILE COMMUNICATION TERMINAL}

1 is a flowchart illustrating a message receiving process in a security method of a subscriber identity module card mounted in a mobile communication terminal of the present invention.

2 is an operation flowchart of a key pressing process in a security method of a subscriber identity module card mounted in a mobile communication terminal of the present invention.

3 is a block diagram showing the configuration of a mobile communication terminal according to an embodiment of the present invention.

The present invention relates to a security method of a subscriber identity module card mounted in a mobile communication terminal, and more particularly, to a subscriber identity module card mounted in a mobile communication terminal capable of stopping an operation of a subscriber identity module card of a lost terminal with a short message. It's about the security method.

Recently, mobile communication terminals have been used for electronic commerce including payment functions instead of simply calling functions. For example, in the subway, it is used as a substitute for a transportation card or for cash payment in place of a credit card.

The mobile terminal is equipped with a subscriber identity module card to store credit card numbers and user's personal information required for electronic commerce, and perform payment by wirelessly communicating with the payment terminal through a loop antenna when payment is made.

The biggest problem in these e-commerce is to effectively protect credit information. However, if a subscriber identity module card is lost, there is a concern that personal information and credit information may be exposed to an unspecified number.

Accordingly, the present invention was conceived in view of the above problems, and provides a mobile communication terminal capable of stopping the operation of a subscriber identity module card of a lost terminal with a short message to prevent fraudulent payments executed by others. It is an object of the present invention to provide a security method of an installed subscriber identity module card.

According to an aspect of the present invention, there is provided a method including: determining whether the message is an e-commerce interruption message or an e-commerce initiation message for controlling an operation of a subscriber identity module card related to an e-commerce upon receiving a short message; Stopping the operation of the subscriber identity module card if the received message is the e-commerce stop message; Operating the subscriber identity module card if the received message is the e-commerce initiation message; Determining whether to request the operation of the subscriber identity module card when an event occurs by pressing a key on the keypad while the operation of the subscriber identity module card is stopped; When requesting the operation of the subscriber identity module card, it is characterized in that it comprises a step of determining whether to operate the subscriber identity module card by determining whether the input password is correct by requesting a password input to the user.

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

1 is a flowchart illustrating an operation of receiving a message in a security method of a subscriber identity module card installed in a mobile communication terminal according to the present invention. Stopping the operation of the card (S21 to S23); If the determination result is false, it is determined whether the received short message is an e-commerce start message, and if true, operating the subscriber identity module card (S24, S25).

3 is a block diagram showing a configuration of a mobile communication terminal in which a conventional subscriber identity module card according to the present invention is inserted.

Assume that the user has lost the mobile communication terminal 40 equipped with the subscriber identification module card 50.

The user reports the terminal loss to the mobile communication provider and transmits an e-commerce interruption message to the lost mobile communication terminal 40.

When the mobile communication terminal 40 receives the short message through the wireless communication unit 41, the mobile communication terminal 40 determines the type of the message and stops the operation of the subscriber identity module card 50 connected to the data port 43 when determining that the message is an e-commerce stop message. (S21 to S23).

When recovering the lost mobile communication terminal 40, the user transmits an e-commerce initiation message to operate the suspended subscriber identity module card 50. The mobile communication terminal 40 determines the type of the received message and operates the subscriber identity module card 50 when determining that the message is an e-commerce initiation message (S24 and S25).

2 is an operation flowchart of a key pressing process in a security method of a subscriber identity module card mounted in a mobile communication terminal according to the present invention. As shown in FIG. Determining whether to request the operation of the subscriber identity module card in the state (S31 to S33); If the determination result is true, the method may include requesting a user to input a password to determine whether the input password is correct to determine whether to operate the subscriber identification module card (S34 to S36).

When an event occurs by pressing a key on the keypad 44, it is determined whether the subscriber identification module card 50 is in an operation stop state and whether the generated event requires the operation of the subscriber identification module card 50 (S31 to S33).

If it is determined that the subscriber identity module card 50 is in the stopped state and requests operation, the mobile communication terminal 40 displays a password input window on the display window of the display unit 45 and requests the user to input a password (S34). ). In operation S35 and S36, the subscriber identification module card 50 is operated if the input password is determined and correct.

As described in detail above, the present invention has the effect of blocking the e-commerce operation from the outside when the subscriber identity module card is lost, and prevents the leakage of personal and credit information.

Claims

Determining whether the message is an e-commerce stop message or an e-commerce start message that controls the operation of a subscriber identity module card associated with the e-commerce upon receiving the short message; Stopping the operation of the subscriber identity module card if the received message is the e-commerce stop message; Operating the subscriber identity module card if the received message is the e-commerce initiation message; Determining whether to request the operation of the subscriber identity module card when an event occurs by pressing a key on the keypad while the operation of the subscriber identity module card is stopped; And requesting the user to input a password to determine whether the input password is correct to determine whether to operate the subscriber identification module card. How to secure the recognition module card.

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