KR200403630Y1 - Apparatus and Method for Performing Secure NFC with Secure Application Modules in Plug-In Type - Google Patents

Abstract

The present invention relates to a secure NFC communication apparatus and method for supporting various security modules in a plug-in form, wherein in the secure NFC communication apparatus, a protocol matching unit checks a chip type of a security module inserted in a plug-in form. Generates a chip confirmation signal, and matches the signals according to the S2C protocol input and output from the NFC communication unit with the protocol of the signals input and output to the security module according to the chip confirmation signal.

Description

Apparatus and Method for Performing Secure NFC with Secure Application Modules in Plug-In Type}

The present invention relates to near field communication (NFC), and more specifically, plug-in general security modules such as a security module or a contact / contactless smart card according to a SigIn-SigOut-Connection (S2C) interface. The present invention relates to an NFC communication apparatus and method capable of supporting the present invention.

1 is a block diagram of a conventional secure NFC communication device 100. Referring to FIG. 1, the secure NFC communication device 100 includes an NFC communication unit 110 and a security module 120.

The NFC communication unit 110 may be controlled by a host processor such as a mobile communication terminal, and communicate with the security module 120 through signals SigIn and SigOut according to an S2C interface. The security module 120 is the same as a subscriber identity module (SIM) and may store authentication information for user identification. The S2C interface was developed by Philips for communication between the NFC communication unit 110 and the security module 120.

The secure NFC communication device 100 may be mounted on a portable terminal, for example, a mobile communication terminal. The secure NFC communication device 100 may perform a function such as a traffic card, a smart card.

For example, a user who wants to pass through a security gate approaches the mobile terminal equipped with the secure NFC communication device 100 close to a main body for accessor authentication installed in the security gate, thereby to antenna of the secure NFC communication device 100. Authentication information may be transmitted to the main body for the accessor authentication through 111. Accordingly, if the main body for the accessor authentication succeeds in authentication, the user can pass through the security gate.

In addition, by approaching a portable terminal equipped with the secure NFC communication device 100 closer to a schedule reader for authenticating the charge amount, according to the successful authentication of the reader to allow the user to use the means of transportation or shopping payment, etc. You can do it.

Until now, the conventional secure NFC communication device 100 supports only the security module 120 communicating with the NFC communication unit 110 according to the S2C interface. Accordingly, when using another security authentication module such as a contact type according to the ISO 7816 protocol or a contactless smart card according to the ISO 14443 protocol as the security module 120, the interface specification with the NFC communication unit 110 is not used. Since data (for example, authentication information, etc.) are not compatible with the secure authentication modules, there is a problem in that data management is inconvenient for the user.

In addition, an attempt is made to receive certain data such as authentication information from the outside by the NFC communication unit 110 to be managed by the security module 120, but it is very insufficient, and moreover, peer-to-peer. Since data transmission and reception are not supported, it is difficult to manage personal information such as an electronic business card managed by a mobile communication terminal.

Accordingly, the present invention is to solve the above-described problems, the object of the present invention, security authentication modules according to the ISO protocol, such as the general contact / contactless smart card as well as the S2C protocol of NFC communication is plug-in (plug- In order to be inserted into the socket in the form to be compatible in NFC communication, to provide a secure NFC communication device for performing a protocol conversion for the security authentication module that does not follow the S2C protocol.

Security NFC communication apparatus according to the present invention for achieving the object of the present invention as described above, the security module is inserted plug-in socket; NFC communication unit for communicating with the outside in a contactless short-range communication method using the signals according to the S2C protocol; And generating a chip identification signal by identifying a chip type of the inserted security module, and matching signals according to the S2C protocol input and output from the NFC communication unit with protocols of signals inputted and outputted to the security module according to the chip identification signal. It includes a protocol matching unit.

The protocol matching unit may include: a chip identification unit configured to transmit a request signal to the security module and generate the chip identification signal according to a response signal received in response thereto; A selection unit for selectively bypassing signals according to the S2C protocol input and output from the NFC communication unit to the security module according to the chip identification signal or outputting the signals as signals for conversion processing; And a protocol conversion unit for performing protocol conversion so as to be compatible with each other between signals according to the S2C protocol for the conversion processing output from the selection unit and signals inputted and outputted to the security module.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings and the contents described in the accompanying drawings, but the present invention is not limited or limited to the embodiments. Like reference numerals in the drawings denote like elements.

2 is a block diagram of a secure NFC communication apparatus 200 according to an embodiment of the present invention. Referring to FIG. 2, the NFC communication apparatus 200 may be a plug-in for inserting an NFC communicator 210, a protocol matching unit 220, a security module 230, and the security module 230. ) Socket 240.

The secure NFC communication device 200 may be mounted on a portable terminal, for example, a mobile communication terminal. As shown in FIG. 9, the secure NFC communication apparatus 200 may perform a function such as a traffic card or a smart card by communicating with a reader. In addition, in the present invention, as shown in FIG. 10, it is proposed to exchange personal information between peers equipped with the secure NFC communication device 200, that is, mobile communication terminals.

In particular, unlike the conventional secure NFC communication processor supports only the communication with a specific security authentication module that communicates according to the S2C interface, in the present invention, as the security module 230, not only the S2C protocol of NFC communication but also the general ISO 7816 protocol. Modules having a security authentication chip according to the ISO protocol such as a contactless or contactless smart card according to the ISO 14443 protocol are inserted into the socket 240 in a plug-in form to be compatible in NFC communication. In order to do this, the protocol matching unit 220 performs a protocol conversion for the security authentication module that does not follow the S2C protocol.

The NFC communication unit 210 is an NFC communication processor for interfacing contactless near field communication with an NFC reader in an external reader or counterpart terminal using signals SigIn and SigOut according to the S2C protocol. The NFC communication unit 210 may operate under the control of a host processor such as a mobile communication terminal equipped with the secure NFC communication device 200.

The NFC communication unit 210 receives and processes the baseband first signal SigIn according to the S2C protocol from the protocol matching unit 220, and has a form of RF (Radio Frequency) corresponding to the first signal SigIn. Generate information. The NFC communication unit 210 transmits the generated information to the reader or the counterpart terminal through the antenna 211 in a non-contact short range communication method, that is, NFC method.

The NFC communication unit 210 may receive certain RF information from the reader or the counterpart terminal through the antenna 211 by the NFC method. The NFC communicator 210 may process the received RF information, generate a baseband second signal SigOut according to the S2C protocol, and transmit the generated second signal SigOut to the protocol matcher 220.

The protocol matching unit 220 performs a protocol of signals input and output between the NFC communication unit 210 and the security module 230 according to a chip identification signal (CIS) indicating a chip type of the security module 230. Match For example, when a chip of the security module 230 indicates a chip according to the S2C protocol according to the chip identification signal (CIS), the protocol matching unit 220 may input / output two inputs and outputs of the NFC communication unit 210. By connecting the terminals and two input / output terminals of the security module 230 to each other, the signals SigIn and SigOut according to the S2C protocol input and output from the NFC communication unit 210 are bypassed to the security module 230. bypasses and bypasses the signals input and output from the security module 230 to the NFC communication unit 210. In addition, when the chip of the security module 230 indicates a security authentication chip of a contactless smart card according to the ISO 14443 protocol according to the chip identification signal (CIS), the protocol matching unit 220 is the NFC communication unit ( Between the security module 230 and the security module 230, signals according to the ISO protocol input / output signals SigIn and SigOut according to the S2C protocol input and output from the NFC communication unit 210 to the security module 230 ( LA-LB) and the signals LA-LB according to the ISO protocol input and output from the security module 230 to signals SigIn and SigOut according to the ISO protocol input and output to the NFC communication unit 210. Convert. The generation of the chip identification signal CIS is described in detail below.

The security module 230 is inserted into the socket 240 in the form of a plug-in, security authentication chip according to the S2C protocol of NFC communication, or contactless smart card core according to the general ISO 7816 protocol or contact ISO 14443 protocol It may be a module having various authentication chips such as a chip. In particular, when the security module 230 has a contactless smart card core chip according to the ISO 14443 protocol, the security module 230 operates according to the signals LA-LB input and output to the chip, so as to store authentication information stored therein (LA). -LB) output to the terminal. The chip appearance of the security module 230 inserted into the plug-in socket 240 may follow a module having a contact smart card core chip according to the ISO 7816 protocol, as shown in FIG. 3, wherein the internal circuit of the chip It can have eight external pins connected to it. Accordingly, a plug-in socket corresponding to the chip specification of the contact smart card according to the ISO 7816 protocol is used as the socket 240 into which the security module 230 is inserted.

In general, in the contact smart card core chip according to the ISO 7816 protocol, 1, 2, 3, 5, and 7 are used, and in the present invention, 4 and 8 may be inserted as the security module 230. It is used as input / output signals (SigIn, SigOut) pins of a security authentication chip that conforms to the S2C protocol of communication, or input / output signals (LA-LB) pins of a contactless smart card core chip according to the general ISO 14443 protocol. In addition, pin 6 may be used as a contactless notification detection (CLAD) pin to detect whether the contactless chip.

4 illustrates an example of a detailed configuration of the security module 230 of FIG. 2. Referring to FIG. 4, the security module 230 includes a central processing unit (CPU) 231, a read only memory (ROM) 232, a random access memory (RAM) 233, and an electrically erasable EEPROM. ROM) 234 may be included. The CPU 231 is responsible for the overall control of the security module 230. The ROM 232 stores an overall system program for the operation of the security module 230, and the RAM 233 stores temporary data required for operation of internal data. The EEPROM 234 stores authentication information for transmitting and receiving with an external card reader or another terminal.

In FIG. 2, the protocol matching unit 220 includes a selector 221, a chip checker 222, and a protocol converter 223.

The chip check unit 222 transmits a request signal to the security module 230 and generates the chip check signal CIS according to a response signal received in response thereto. When the security module 230 indicates a module having a chip according to the S2C protocol according to the chip confirm signal CIS, the selector 221 may be configured to comply with the S2C protocol input and output from the NFC communication unit 210. Bypass signals SigIn and SigOut to the security module 230. When the security module 230 indicates a module having a chip according to the ISO protocol according to the chip identification signal (CIS), the selector 221 according to the S2C protocol input and output from the NFC communication unit 210 Signals SigIn and SigOut are output to the protocol converter 223 as signals for protocol conversion processing. Accordingly, the protocol converter 223 outputs from the selector 221 when the security module 230 indicates a module having a chip according to the ISO protocol according to the chip identification signal CIS. Protocol conversion is performed so as to be compatible with each other between signals SigIn and SigOut according to the S2C protocol for conversion processing and signals LA-LB input and output to the security module 230.

When the protocol conversion unit 223 performs protocol conversion processing, a detailed block diagram showing the relationship between the protocol conversion unit 223 and the chip according to the ISO protocol inserted as the security module 230 is shown in FIG. 2. 5 is shown. Referring to FIG. 5, the protocol converter 223 includes a signal converter 223-1 and a waveform shaping unit 223-2.

The signal converter 223-1 performs a protocol conversion so as to be compatible with each other between Miller coded signals according to the S2C protocol and Manchester coded signals according to the ISO protocol.

For example, the signal SigOut according to the S2C protocol from the NFC communication unit 210 is a digital form coded according to the Miller method as shown in the following figure of FIG. 6, and the signal converter 223-1. The analog signal LAA-LBB generated from the N-AB and output to the waveform shaping unit 223-2 has a signal form modulated and coded according to a Manchester method as shown in FIG. 6. As shown in FIG. 6, the signal converter 223-1 converts the signal SigOut according to the Miller method into an analog signal having a peak-to-peak level of a predetermined frequency according to its logic state. Is converted. That is, a digital signal in a logic high state is converted into an analog signal having a large peak-peak level, and a digital signal in a logic low state is converted into an analog signal having a small peak-peak level. As shown in FIG. 6, the digital code according to the Miller method sees a signal having a logic low state in an initial part of a predetermined period as data '0', and a signal having a logic low state in a middle part of a predetermined period as a data '1'. 'Robo has a coding scheme. The signal according to the Manchester method has a coding method in which a Miller digital value is modulated into a subcarrier form as shown in FIG. 6.

The waveform shaping unit 223-2 includes an analog signal LA-LB transmitted between the signal converter 223-1 and the security module 230 to the security module 230. The waveform is shaped to be larger than the analog signal LAA-LBB transmitted to 223-1).

Similarly, the analog signal LA-LB output from the security module 230 has a signal form modulated and coded according to the Manchester method as shown in the following figure of FIG. 7, and the analog signal LA-LB. After the waveform shaping is performed by the waveform shaping unit 223-2 to (LAA-LBB), the signal converting unit 223-1 converts the signal SigIn coded by the Miller method according to the S2C protocol.

In FIG. 5, the waveform shaping unit 223-2 includes a first resistor R1, a second resistor R2, a first diode D1, a second diode D2, and a first capacitor C1. ), A second capacitor C2, a third capacitor C3, a fourth capacitor C4, and an inductor L1. The circuit representing the waveform shaping unit 223-2 of FIG. 5 is merely an example, and various various circuits for waveform shaping may be used. The first resistor R1 is connected between the first terminal LS and the second terminal LAA connected to the signal converter 223-1. The first capacitor C1 is connected between the second terminal LAA connected to the signal converter 223-1 and the first node ND1. The second resistor R2 is connected between the first node ND1 and the ground GND. The second capacitor C2 is connected between the first node ND1 and the ground GND. The first diode D1 is connected between the first node ND1 and the second node ND2. The second diode D2 is connected between the second node ND2 and the ground GND. The third capacitor C3 is connected between the first terminal LA and the second terminal LB connected to the security module 230. The fourth capacitor C4 is connected between the first terminal LA connected to the security module 230 and the second node ND2. The inductor L1 is connected between the third terminal LBB connected to the signal converter 223-1 and the first terminal LA connected to the security module 230.

At this time, when inputting and outputting the protocol-converted signals to the security module 230, for the operation of the waveform shaping unit 223-2, the signal conversion unit 223-1 turns on the switch SW. The ground GND is supplied to the second terminal LB connected to the security module 230 by turning on.

Therefore, the general operation of the first diode (D1) and the second diode (D2) of the waveform shaping unit (223-2) and the circuit operation in the form of RC filters (R2, C2), the security module ( The signal LA-LB of the terminals connected to 230 is reduced by the waveform shaping unit 223-2 and output to the signal converter 223-1, and is output from the signal converter 223-1. The signal LAA-LBB is output from the waveform shaping unit 223-2 to the security module 230. For example, the signal LAA-LBB transmitted to the signal converter 223-1 has a peak-to-peak of about 3V and is transmitted to the security module 230. The signal LA-LB has a peak-peak of about 12 to 13V.

Hereinafter, the operation of the protocol matching unit 220 will be described in more detail with reference to the flowchart of FIG. 8.

First, when power is supplied to the protocol matching unit 220, a predetermined voltage is transmitted to the security module 230 so that the security module 230 is also in an operating state (S810 of FIG. 8). In this initial state, the chip checker 222 first assumes that the security module 230 has a chip according to the S2C protocol, and the S2C to the SigOut (or LA) terminal of the security module 230. The schedule request signal REQA (Request A) according to the protocol (for example, 0x26 in hexadecimal) is transmitted (S820 of FIG. 8). After the schedule request signal REQA is transmitted to the security module 230, the chip checking unit 222 transmits a SigIn terminal (or LB terminal) of the security module 230 within a predetermined time (for example, 5 msec). It is determined whether a constant response signal (ATQA: Answer to Request A) (for example, 0403 in hexadecimal) is received from the S2C protocol (S830 in Fig. 8). When the constant response signal ATQA is received, the chip identification unit 222 generates the chip identification signal CIS indicating the module in which the security module 230 has a chip according to the S2C protocol. In this case, the chip identification signal CIS may be output in a logic low state. When the chip identification signal CIS is output in a logic low state, the selector 221 directly connects the NFC communication unit 210 with a chip according to the S2C protocol inserted as the security module 230. In addition, signals SigIn and SigOut according to the S2C protocol input and output from the NFC communication unit 210 are bypassed to the security module 230 (S840 of FIG. 8).

On the other hand, in step S830, if a predetermined response signal according to the S2C protocol is not received, the chip check unit 222 assumes that the security module 230 has a chip according to the ISO protocol, the security module ( A constant request signal REQA (eg, 0x26 in hexadecimal) according to the ISO protocol is transmitted to the (LA-LB) terminal (or SigIn and SigOut terminals) of 230 (S850 of FIG. 8). At this time, after the predetermined request signal REQA is transmitted to the security module 230, the chip checking unit 222 may perform the (LA-LB) of the security module 230 within a predetermined time (for example, 5 msec). It is determined whether a constant response signal (ATQA) (for example, 0403 in hexadecimal number) according to the ISO protocol is received from the terminal (or SigIn or SigOut terminal) (S860 in FIG. 8). When the constant response signal ATQA is received, the chip identification unit 222 generates the chip identification signal CIS indicating a module in which the security module 230 has a chip according to the ISO protocol. In this case, the chip identification signal CIS may be output in a logic high state. When the chip confirmation signal (CIS) is output in a logic high state, between the NFC communication unit 210 and the chip according to the ISO protocol inserted as the security module 230, the input and output at the NFC communication unit 210 In order to convert the signals SigIn and SigOut according to the S2C protocol and the signals LA-LB according to the ISO protocol input and output from the security module 230 to be compatible with each other, the selection unit ( 221 outputs signals SigIn and SigOut according to the S2C protocol for the conversion process to the protocol converter 223. Accordingly, the protocol converter 223 is compatible with the signals SigIn and SigOut according to the S2C protocol for the conversion process and the signals LA-LB input and output to the security module 230. Perform the conversion (S870 of Fig. 8).

As described above, the chip check unit 222 first checks whether the security module 230 is a module having a chip according to the S2C protocol. When transmitting a schedule request signal (REQA) according to the S2C protocol and receiving a schedule response signal (ATQA) through the (SigIn, SigOut) or (LA, LB) terminals of the security module 230, Although it has a 3 ~ 5V peak-peak of, when the security module 230 transmits a constant request signal (REQA) according to the ISO protocol and receives a constant response signal (ATQA), 12 ~ of analog according to the Manchester method This is because it has a 13V peak-peak. As such, by first checking whether the security module 230 operates according to the low voltage, that is, the S2C protocol, damage to the circuit due to the high voltage applied to the security module 230 may be prevented.

Meanwhile, the secure NFC communication device 200 as shown in FIG. 2 according to the present invention may be mounted in a mobile communication terminal and communicate with a reader as shown in FIG. 9.

For example, a user who wants to pass through a security gate approaches the main body for authentication of a person installed in the security gate, that is, the reader by approaching a mobile communication terminal equipped with the secure NFC communication device 200 close to the secure NFC communication. Authentication information may be transmitted to the reader for accessor authentication through the antenna 211 of the device 200. That is, when the information requested for authentication in the reader is received through the antenna 211 of the secure NFC communication device 200, the information based on the received signal is the NFC communication unit 210 and the protocol matching unit. It may be delivered to the security module 230 through 220. At this time, the security module 230 extracts authentication information stored in the EEPROM 234, for example, user identification for user identification under the control of the CPU 231, and the extracted authentication information The protocol matching unit 220 and the NFC communication unit 210 may be transmitted to the reader. Accordingly, if the corresponding authentication is successful in the reader, the user may pass through the security gate.

In addition, when a schedule reader for transportation or shopping payment is used, the charging amount of the reader is approached by bringing the mobile communication terminal equipped with the secure NFC communication apparatus 200 closer to the reader in the above manner. The user may be able to make a corresponding payment according to the authentication success.

In addition, the secure NFC communication apparatus 200 as shown in FIG. 2 according to the present invention is mounted on different mobile communication terminals as shown in FIG. 10 so that communication can be performed between the terminals (peer-to-peer). can do.

For example, most users today store and use electronic business cards, photos, videos, or telephone number lists in mobile communication terminals. However, such personal information must be newly entered or downloaded every time the terminal is replaced, and the user can use the same personal information as the previous terminal in the new replacement terminal.

However, in the present invention, the above personal information may be managed in the security module 230 of the secure NFC communication device 200 mounted in the mobile communication terminal. When the personal information is managed by the security module 230, the personal information may be moved to the counterpart terminal through communication between the mobile communication terminals.

For example, by accessing mobile communication terminals equipped with the secure NFC communication device 200 closer to each other, any one terminal to transmit personal information may be authenticated through the antenna 211 of the secure NFC communication device 200. Personal information may be transmitted to the counterpart terminal together with the information. When the counterpart terminal receives the authentication information and the personal information through the antenna 211 of the secure NFC communication apparatus 200, the information based on the received signals is the NFC communication unit 210 and the protocol matching unit. It may be delivered to the security module 230 through 220. In this case, the security module 230 may perform certain authentication under the control of the CPU 231, and store and manage the personal information included in the received signals in the EEPROM 234 when the authentication is successful. can do.

As described above, in the value secure NFC communication device 200 according to the present invention, the chip matching signal (CIS) by checking the chip type of the security module 230, the protocol matching unit 220 is inserted in the plug-in form ), And signals (LA-LB) input and output signals (SigIn, SigOut) according to the S2C protocol input and output from the NFC communication unit 210 according to the chip check signal (CIS) to the security module 230 Match the protocol of

The secure NFC communication method according to the present invention can be implemented in the form of program instructions that can be executed by various computer means and recorded in a computer readable medium. The computer readable medium may include program instructions, data files, data structures, etc. alone or in combination. The program instructions recorded on the medium may be those specially designed and constructed for the present invention, or may be known and available to those skilled in computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tape, optical media such as CD-ROMs, DVDs, and magnetic disks, such as floppy disks. Magneto-optical media, and hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like. The medium may be a transmission medium such as an optical or metal wire, a waveguide, or the like including a carrier wave for transmitting a signal specifying a program command, a data structure, or the like. Examples of program instructions include not only machine code generated by a compiler, but also high-level language code that can be executed by a computer using an interpreter or the like. The hardware device described above may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.

Although the present invention has been described with reference to the limited embodiments and drawings, the present invention is not limited to the above embodiments, and those skilled in the art to which the present invention pertains various modifications and variations from such descriptions. This is possible. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the claims below and equivalents thereof.

As described above, in the secure NFC communication apparatus according to the present invention, since the signal according to the S2C protocol of the NFC communication is selectively converted into a signal conforming to the protocol of another security authentication module, the S2C protocol inserted into the socket in a plug-in form. By supporting various security authentication modules such as general contact / contactless smart card as well as the security authentication module according to, there is an effect that the user authentication information managed in various types of security authentication modules can be easily compatible.

In addition, since portable devices such as mobile communication terminals, that is, data communication between peers are free, personal information such as electronic business cards, photos, videos, registered telephone numbers, and the like can be easily managed.

1 is a block diagram of a conventional secure NFC communication device.

2 is a block diagram of a secure NFC communication apparatus according to an embodiment of the present invention.

3 is a view for explaining the chip appearance of the security module inserted into the plug-in socket.

4 is an example showing a specific configuration of the security module of FIG.

FIG. 5 is a detailed block diagram illustrating a relationship between a protocol converter and an ISO chip of FIG. 2.

6 is an example showing the waveform of each signal for explaining a process that the signal according to the S2C method from the NFC communication unit is converted to a signal according to the ISO method and output to the security module.

FIG. 7 is an example illustrating waveforms of signals for explaining a process of converting a signal based on an ISO method from a security module into a signal based on an S2C method and outputting the same to an NFC communication unit.

8 is a flowchart illustrating an operation of the protocol matching unit of FIG. 2.

9 is a diagram illustrating a communication application relationship between a mobile communication terminal and a reader equipped with a secure NFC communication device according to the present invention.

10 is a view for explaining the communication application relationship between the mobile communication terminal equipped with a secure NFC communication apparatus according to the present invention.

<Explanation of symbols for main parts of the drawings>

200: secure NFC communication device

210: NFC communication unit

220: protocol matching unit

222: chip identification unit

223: protocol conversion unit

230: security module

Claims (16)

A plug-in socket into which the security module is inserted; NFC communication unit for communicating with the outside in a contactless short-range communication method using the signals according to the S2C protocol; And A protocol for generating a chip identification signal by identifying a chip type of the inserted security module, and matching signals according to the S2C protocol input and output from the NFC communication unit with protocols of signals inputted and outputted to the security module according to the chip identification signal. Matching part Secure NFC communication device comprising a. The method of claim 1, wherein the security module, Secure NFC communication apparatus characterized in that the module having any one of the chip according to the ISO protocol or the chip according to the S2C protocol. The secure NFC communication device of claim 2, wherein the chip according to the ISO protocol is a chip of a contactless smart card. The NFC device of claim 1, wherein the plug-in socket is a socket corresponding to a chip standard of a contact smart card. The method of claim 1, wherein the security module, And a user ID for user identification or a charge amount for using a service as authentication information in response to the input signal. The method of claim 1, wherein the security module, And perform authentication in response to an input signal, and store personal information included in the input signal upon successful authentication. The method of claim 6, wherein the secure NFC communication device is mounted on a mobile communication terminal, the input signal to the security module is received in the contactless short-range communication method with another mobile communication terminal equipped with the secure NFC communication device Secure NFC communication device, characterized in that the signal generated from the information. 8. The secure NFC device of claim 7, wherein the personal information is an electronic business card, photo, video, or phone number list managed by a security module of the other mobile communication terminal. The method of claim 1, wherein the protocol matching unit, And a chip check unit for transmitting a request signal to the security module and generating the chip check signal according to a response signal received in response thereto. The method of claim 9, wherein the chip check unit, First check whether the security module is a module having a chip according to the S2C protocol, and if the security module is not a module having a chip according to the S2C protocol, it is checked whether the security module is a module having a chip according to the ISO protocol. Secure NFC communication device, characterized in that. The method of claim 10, wherein the chip check unit, The chip identification indicating a module having a chip according to the S2C protocol when the constant response signal according to the S2C protocol is received within a predetermined time after transmitting the schedule request signal according to the S2C protocol to the security module Secure NFC communication device, characterized in that for generating a signal. The method of claim 11, wherein the chip check unit, If the constant response signal according to the S2C protocol is not received, the security module may be configured to receive the constant response signal according to the ISO protocol within a predetermined time after transmitting the schedule request signal according to the ISO protocol to the security module. And generating the chip identification signal indicative of a module having a chip according to an ISO protocol. The method of claim 9, wherein the protocol matching unit, A selection unit for selectively bypassing signals according to the S2C protocol input and output from the NFC communication unit to the security module according to the chip identification signal or outputting the signals as signals for conversion processing; And Protocol conversion unit for performing a protocol conversion to be compatible with each other between the signals according to the S2C protocol for the conversion processing output from the selection unit and the signal input and output to the security module Secure NFC communication device further comprising. The method of claim 13, wherein the protocol conversion unit, A signal converter configured to perform protocol conversion so as to be compatible with each other between the Miller coded signals according to the S2C protocol and the Manchester coded signals according to the ISO protocol; And A waveform shaping unit for shaping a waveform such that an analog signal transferred between the signal converter and the security module to the security module is larger than an analog signal transferred to the signal converter. Secure NFC communication device comprising a. The method of claim 14, wherein the waveform shaping portion, A first resistor connected between a first terminal connected to the signal converter and a second terminal; A first capacitor connected between a second terminal connected to the signal converter and a first node; A second resistor coupled between the first node and ground; A second capacitor connected between the first node and the ground; A first diode connected between the first node and a second node; A second diode coupled between the second node and the ground; A third capacitor connected between a first terminal and a second terminal connected to the security module; A fourth capacitor connected between the first terminal connected to the security module and the second node; And An inductor connected between a third terminal connected to the signal converter and a first terminal connected to the security module Secure NFC communication device comprising a. The method of claim 15, wherein the signal conversion unit, When the protocol-transformed signals are inputted and outputted to the security module, the secure NFC communication device, characterized in that to supply a ground to the second terminal connected to the security module.