JP2012073955A - Transmitter/receiver and authentication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a transmitter/receiver difficult to be illegally used.SOLUTION: An IC card comprises switches (buttons) for switching a circuit state between a communicative state and a non-communicative state by combining operation states. A circuit generates electromotive force by receiving an electric wave from the exterior in the communicative state switched by a button operation, and forms an antenna transmitting information to the exterior by a predetermined frequency. By informing only an IC card user of a combination of buttons which can switch the circuit in the communicative state, it is possible to make the IC card difficult to be illegally used. Dummy buttons can be included in the switches.

Description

  The present invention relates to a transceiver and an authentication system.

  In recent years, IC (Integrated Circuit) cards have been used in every scene. Some IC cards are referred to as non-contact type IC cards equipped with a memory IC and equipped with a communication antenna circuit. Such a non-contact IC card includes, for example, an RFID (Radio Frequency IDentification) tag. The non-contact type IC tag is classified into an active type and a passive type when focusing on its starting power. The active IC card has a built-in battery, and is activated by this battery. Information in the memory is transmitted in response to a request from the reader / writer. On the other hand, a passive IC card does not have a battery inside, and an electromotive force is generated in a built-in circuit by receiving radio waves from a reader / writer. Thereby, the information in the memory is transmitted.

  Thus, the passive IC card does not require a built-in battery, and thus can be made thin and lightweight. However, in the case of the passive type, there is a possibility that information is transmitted / received to / from a reader / writer whose purpose is not communication. In order to solve such a problem, a passive RFID tag provided with an antenna switch that can be manually switched between connection and disconnection to a coil antenna so that information can be transmitted only to a target reader / writer is known (for example, Patent Documents 1 and 2). This REID tag can avoid transmission / reception with an unintended reader / writer by turning on the antenna only near the target reader / writer.

JP 2007-41817 A JP 2006-216083 A

  The IC card (RFID tag) disclosed in Patent Documents 1 and 2 can be expected to have a certain effect as a measure against so-called skimming, for example. However, for example, when the original owner of the IC card loses the IC card and a third party picks it up or the IC card is stolen, the acquirer can easily operate the antenna switch. There is a risk of sending and receiving. In other words, there was room for further improvement in terms of prevention of unauthorized use and security.

  Therefore, the transmitter / receiver and the authentication system disclosed in this specification have an object of improving security by making unauthorized use of the transmitter / receiver difficult.

  The transmitter / receiver disclosed in this specification can switch between a communicable state and a communicable state, and generates an electromotive force by receiving an external radio wave in a communicable state, and is set in advance. A circuit that forms an antenna that transmits information to the outside by a frequency, and a switch group that switches a state of the circuit between a communicable state and a communicable state by a combination of operation states.

  By setting the combination of switch operations to enable communication only to the authorized user, such as the authorized owner of the transmitter / receiver, to prevent unauthorized use of the transmitter / receiver against the intention of the authorized user Can be difficult.

  In addition, the authentication system disclosed in the present specification performs at least one circuit that transmits information to the outside at a preset frequency by operating a plurality of switches, and performs wireless communication with the transceiver. A transmitter / receiver; and a control unit that determines whether or not authentication is possible by comparing a transmission pattern from the transmitter / receiver received by the transmitter / receiver with a predetermined authentication pattern.

  If a pattern (authentication pattern) from an authenticable transmitter / receiver is set in advance and this authentication pattern is notified only to a legitimate user, such as a legitimate owner of the transmitter / receiver, the other person can specify the transmitter / receiver. When used, it is not easily authenticated. This makes it difficult to illegally use the transmitter / receiver, contrary to the intention of the legitimate user.

  According to the transmitter / receiver disclosed in this specification, it is possible to make unauthorized use of the transmitter / receiver difficult. Further, according to the authentication system disclosed in the present specification, it is possible to make unauthorized use of the transmitter / receiver difficult.

1A and 1B are explanatory views schematically showing an example of an IC card according to an embodiment of the present invention. FIGS. 2A and 2B are explanatory diagrams illustrating examples of buttons that can be included in the first switch group according to the embodiment of the present invention. FIG. 3 is an explanatory diagram illustrating an example of a sub-circuit. FIGS. 4A and 4B are explanatory diagrams illustrating examples of buttons that can be included in the first switch group. FIGS. 5A and 5B are explanatory diagrams illustrating an example of buttons that can be included in the second switch group. FIGS. 6A and 6B are explanatory diagrams illustrating examples of buttons that can be included in the second switch group. FIGS. 7A and 7B are explanatory diagrams illustrating examples of buttons that can be included in the second switch group. 8A and 8B are cross-sectional views showing an example of the internal structure of the button. 9A and 9B are cross-sectional views showing other examples of the internal structure of the button. 10A and 10B are cross-sectional views showing examples of other buttons. FIGS. 11A and 11B are cross-sectional views showing examples of other buttons. FIG. 12 is a cross-sectional view of an example of an IC card. FIG. 13 is an example of a block diagram of an authentication system according to the second embodiment. 14A and 14B are explanatory diagrams of a plurality of circuits included in the IC card according to the second embodiment. FIG. 15 is an explanatory diagram illustrating an example of an authentication pattern in the authentication system.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. However, in the drawings, the dimensions, ratios, and the like of each part may not be shown so as to completely match the actual ones. In some cases, details are omitted in some drawings.

  A schematic configuration of the IC card 1 according to the first embodiment will be described with reference to the drawings. FIGS. 1A and 1B are explanatory views schematically showing an example of an IC card 1 which is an example of a transceiver. FIGS. 2A and 2B are explanatory diagrams illustrating an example of the button 6 that can be included in the first switch group. FIG. 3 is an explanatory diagram illustrating an example of the sub-circuit 5. FIGS. 4A and 4B are explanatory diagrams showing an example of the button 8 that can be included in the first switch group. FIGS. 5A and 5B are explanatory diagrams illustrating an example of the button 9 that can be included in the second switch group. FIGS. 6A and 6B are explanatory diagrams illustrating an example of the button 10 that can be included in the second switch group. FIGS. 7A and 7B are explanatory diagrams showing an example of the button 11 that can be included in the second switch group.

  An IC card 1 which is an example of a transceiver is provided with a substrate 2 in a card body 1a as shown in FIGS. 1 (a) and 1 (b). A circuit (main circuit) 4 including an IC chip 3 is provided on the substrate 2. The main circuit 4 is cut at a plurality of places (three places). The switches included in the first switch group, that is, the button 6 and the button 7 are provided in accordance with the cut portion. The switches (buttons) included in the first switch group are operated to bring the main circuit into a communicable state. The main circuit 4 is a circuit that enables transmission at a preset frequency when any switch included in the switch group is operated to be in a conductive state. The main circuit 4 in the present embodiment becomes in a communicable state when the three cut points are connected. On the other hand, when any of the three locations remains in a disconnected state, communication is disabled. That is, the main circuit 4 can switch between a communicable state and a communicable state. The main circuit 4 generates an electromotive force by receiving an external radio wave in a state where communication is possible. Then, when the buttons 6 and 7 are operated to be in a conductive state, an antenna that transmits information to the outside at a preset frequency is formed. The transmitter / receiver is not limited to a card shape, and may have another shape.

  As shown in FIGS. 2 (a) and 2 (b), the button 6 includes a conducting portion 6a. The button 6 is shown in FIG. 2 (a) in a normal state, that is, in a state where it is not pressed. In addition, the main circuit 4 is separated. Then, when the user presses the button 6, the main circuit 4 can be brought into a connected state as shown in FIG. The button 7 is different from the button 6 in that the IC chip 3 is provided, but other configurations are the same as the button 6. As shown in FIG. 1B, when the two buttons 6 and 7 are pressed, the main circuit 4 becomes in a communicable state by connecting all three disconnected places.

  The IC card 1 includes the main circuit 4 as described above. The main circuit 4 becomes conductive when a switch such as the button 6 is operated (pressed), and can transmit at a preset frequency. The IC card 1 can include a sub circuit 5 combined with such a main circuit 4. The sub-circuit 5 is a circuit that prevents transmission at a preset frequency by setting the main circuit 4 in a short-circuited state by being in a conductive state. For example, when the button 8 is operated (pressed), as shown in FIG. Thereby, the main circuit 4 can be in a state in which transmission at the set frequency is possible. Such a button 8 belongs to the first switch group because it is a switch that makes the main circuit 4 communicable when operated (pressed). The sub circuit 5 can also be in a state in which the main circuit 4 cannot be transmitted by the set frequency by operating the switch and being connected.

  The IC chip 1 includes a switch group including a plurality of buttons such as the buttons 6 and 7. Here, this switch group will be described in detail. The switch group can be classified into a first switch group and a second switch group according to its function. The first switch group can make the main circuit 4 communicable by being operated. On the other hand, the second switch group includes switches that are operated to make the main circuit 4 unable to communicate. The second switch group includes dummy switches that are arranged in the main circuit 4 or the sub circuit 5 and do not affect the communication state of the main circuit 4 even if operated. The switches included in the second switch group prevent the IC card 1 from performing normal communication.

  The buttons 6 shown in FIGS. 2A and 2B are included in the first switch group. The button 6 is provided at a location where the main circuit 4 is cut as described above. The button 6 includes a conduction portion 6a, and the main circuit 4 can be brought into a conduction state at the location by being operated (pressed). The button 6 brings the main circuit 4 into a conductive state, thereby bringing the main circuit 4 into a communicable state at a preset frequency.

  Buttons 8 shown in FIGS. 4A and 4B are included in the first switch group. The button 8 is provided at a location where the sub circuit 5 is disconnected. The button 8 includes a conduction portion 8a, and the sub-circuit 5 is in a conduction state as shown in FIG. And by operating (pressing), as shown in FIG.4 (b), the subcircuit 5 can be made into a cutting | disconnection state. The button 8 brings the main circuit 4 into a communicable state at a preset frequency by setting the sub-circuit 5 in a disconnected state.

  Buttons 9 shown in FIGS. 5A and 5B are included in the second switch group. The button 9 is provided at a location where the main circuit 4 is cut. The button 9 is provided with a conduction part 9a. When the button 9 is not operated normally, as shown in FIG. 5A, the main circuit 4 is in a conduction state at that location. When operated (pressed), the main circuit 4 can be cut off as shown in FIG. The button 9 puts the main circuit 4 into a disconnected state, thereby bringing the main circuit 4 into a communication disabled state at a preset frequency.

  Buttons 10 shown in FIGS. 6A and 6B are included in the second switch group. The button 10 is provided at a location where the sub circuit 5 is disconnected. The button 10 includes a conducting portion 10a. When the button 10 is not operated, the sub-circuit 5 is disconnected at the relevant position as shown in FIG. 6A. When operated (pressed), the sub-circuit 5 can be brought into a conducting state as shown in FIG. The button 10 brings the main circuit 4 into a communication disabled state at a preset frequency by bringing the sub circuit 5 into a conductive state.

  The buttons 11 shown in FIGS. 7A and 7B are included in the second switch group. The button 11 is provided at a location where the main circuit 4 is in a connected state. The button 11 includes a conduction part 11a. However, the button 11 does not affect the state of the circuit. That is, the button 11 functions as a dummy switch that does not affect the transmission state of the main circuit 4. For this reason, you may abbreviate | omit the conduction | electrical_connection part 11a. Further, since the button 11 does not affect the transmission state of the main circuit 4, it may be provided on the sub circuit 5.

  The IC card 1 includes at least one button included in the first switch group, and may include a button appropriately selected from the buttons included in the first switch group and the buttons included in the second switch group. . The IC card 1 can be provided with different combinations of buttons. The main circuit 4 provided in the IC card 1 can switch between a communicable state and a communicable state by a combination of button operation states. A plurality of buttons included in the first switch group may be provided. When there are a plurality of buttons included in the first switch group, the buttons included in the second switch group can be omitted.

  Next, an example of the structure of the button 6 that brings the main circuit 4 into a connected state by pressing will be described with reference to FIG. First, the IC card 1 is provided with a case-shaped card body 1a as a cover. The card body 1a is formed of an elastic resin so that the button 6 can be pushed in from the outside. The surface of the card body 1a is a smooth surface so that the buttons are not recognized from the outside. That is, if the button position is depressed or raised, the button position is recognized. For this reason, the surface of the card body 1a is made smooth so that the position of the button is not easily recognized.

  Between the button 6 and the substrate 2, a ball member 12 which is an example of an elastic member is disposed. The ball member 12 is stably installed in a dish-shaped depression provided on the substrate 2 and a dish-shaped depression provided on the button 6. Specifically, the ball member 12 is sandwiched between the button 6 and the substrate 2. In order to more reliably prevent the ball member 12 from falling off, an adhesive may be applied to attach the ball member 12 between the button 6 and the substrate 2. The ball member 12 has elasticity that can return the button 6 to the original position shown in FIG. 8A from the pressed state shown in FIG. Further, the ball member 12 has heat resistance capable of withstanding the heat load at the time of manufacturing the IC card. Although the spherical member 12 of the present embodiment is formed of silicon rubber, it can also be formed using other materials having the above properties. A button that can be connected to the sub-circuit 5 by pressing, for example, the button 10 shown in FIG. Further, the button 6 and the button 10 may be configured as shown in FIG. In other words, as an example of the elastic member, the spring member 13 may be provided instead of the ball member 12.

  Next, an example of the structure of the button 9 that causes the main circuit 4 to be disconnected by being pressed will be described with reference to FIG. The button 9 belongs to the second switch group in order to bring the main circuit 4 into a disconnected state when operated (pressed). First, the IC card 1 is provided with a case-shaped card body 1a as a cover. The card body 1a is formed of a resin having elasticity so that the button 9 can be pushed in from the outside. The surface of the card body 1a is a smooth surface so that the buttons are not recognized from the outside. That is, if the button position is depressed or raised, the button position is recognized. For this reason, the surface of the card body 1a is made smooth so that the position of the button is not easily recognized.

  Between the button 9 and the card body 1a, a ball member 12 as an example of an elastic member is disposed. The ball member 12 is stably installed in a dish-like depression provided in the card body 1 a and a dish-like depression provided in the button 9. The spherical member 12 has elasticity that can return the button 9 to the original position shown in FIG. 10A from the pressed state shown in FIG. Further, the ball member 12 has heat resistance capable of withstanding the heat load at the time of manufacturing the IC card. The spherical member 12 of the present embodiment is made of silicon, but can be formed using other materials having the above-described properties. A button that can disconnect the sub-circuit 5 by pressing, for example, a button 8 shown in FIG. Further, the buttons 8 and 9 can be configured as shown in FIG. That is, as an example of the elastic member, the spring member 14 may be provided instead of the ball member 12.

  Next, an example of the internal structure of the IC card 1 will be described with reference to FIGS. The IC card 1 includes a support 1a1 made of polyethylene terephthalate (PET) inside the card body 1a, and a space is formed inside the card body 1a. A substrate (flexible substrate) 2 is provided inside the card body 1a. A main circuit 4 and a sub circuit 5 are provided on the substrate 2. Since the card main body 1a and the column 1a1 may be subjected to a heat load when the IC card is manufactured, the card body 1a and the support 1a1 have heat resistance that can withstand the manufacturing.

  The IC card 1 includes a partition plate 1a2. By providing the partition plate 1a2, the card body 1a is divided into two layers of the front side and the back side. The IC card 1 includes buttons B1 to B8 that form a switch group. Buttons B1 to B4 are all buttons belonging to the first switch group, and B1, B2, and B4 are the buttons 6 shown in FIG. B3 is a button 7 provided with the IC chip 3. Buttons B5 to B8 are all buttons belonging to the second switch group, and are the buttons 10 shown in FIG. There are four sub-circuits 5 provided. Any of these four sub-circuits 5 can independently put the main circuit 4 in a short-circuit state. One button B5 to B8 is provided in each sub circuit 5. When the buttons B1 to B4 are pressed at the same time, the main circuit 4 is connected over the entire circumference. The main circuit 4 is in a state in which communication at a preset frequency is possible by being connected over the entire circumference. On the other hand, when any one of the buttons B5 to B8 is pressed, the main circuit 4 is short-circuited, and communication is disabled at a preset frequency.

  In order for the IC card 1 as described above to communicate normally, it is necessary to simultaneously press the buttons B1 to B4. When at least one of the buttons B1 to B4 is not pressed, the IC card 1 cannot communicate. Even if the buttons B1 to B4 are pressed, if any one of the buttons B5 to B8 is pressed, the main circuit 4 is short-circuited and the IC card 1 cannot communicate. The combination of these buttons B1 to B8 is informed only to the authorized user of the IC card 1.

  In the first place, a person other than a legitimate user often does not know that communication cannot be performed without pressing a button. It is also difficult to grasp where the buttons B1 to B8 are located from the surface of the IC card 1. As a result, it is very difficult for a person other than the authorized user of the IC card 1 to communicate using the IC card 1. Thus, unauthorized use of the IC card 1 is difficult.

  On the other hand, a legitimate user of the IC card 1 presses the buttons B1 to B4 while holding the IC card 1 over a target reader / writer (transceiver). A legitimate user is aware of a combination of buttons for making the main circuit 4 communicable. In addition, the arrangement of the buttons B1 to B4 is also known. For this reason, communication can be performed easily.

  In addition, as long as the IC card 1 includes at least one button included in the first switch group, the number, type, and arrangement of buttons included in the IC card 1 are arbitrary. For example, the main circuit 4 does not have a cutting part, and a plurality of buttons 8 for cutting the sub circuit 5 can be provided.

  Next, the authentication system 100 according to the second embodiment will be described with reference to FIGS. 13 to 15. FIG. 13 is an example of a block diagram of the authentication system 100 according to the second embodiment. 14A and 14B are explanatory diagrams of a plurality of circuits 104a, 104b, and 104c included in the IC card 112 included in the authentication system 100 according to the second embodiment. FIG. 15 is an explanatory diagram illustrating an example of an authentication pattern in the authentication system 100.

  The authentication system 100 includes an IC card 112 that is an example of a transceiver. The authentication system 100 includes a personal computer (PC) 110 that is an example of a control unit that is connected to a reader / writer (antenna) 111 that is an example of a transceiver that performs wireless communication with an IC card 112.

  The IC card 112 has individual identification information, and includes three circuits 114a, 114b, and 114c as shown in FIG. The circuits 114a, 114b, and 114c are in common with the circuit (main circuit) 4 in the first embodiment. However, the set frequency is different. The circuits 114a, 114b, and 114c are arranged in a stacked state as shown in FIG. The circuit 114a includes buttons 116a and 117a. An IC chip 113a is mounted on the button 117a. The circuit 114b includes buttons 116b and 117b. An IC chip 113b is mounted on the button 117b. The circuit 114c includes buttons 116c and 117c. An IC chip 113c is mounted on the button 117c.

  All of the circuits 114a, 114b, and 114c in the embodiment include buttons belonging to the first switch group in the first embodiment. However, the circuits 114a, 114b, and 114c include a circuit corresponding to the sub circuit 5 or buttons included in the second switch group. May be provided.

  In this embodiment, the three circuits 114a to 114c are provided. However, it is sufficient that at least one such circuit is provided. Further, unlike the case of the first embodiment, each circuit transmits information to the outside by operating at least one switch (button) by a preset frequency and / or an identification number stored in a memory. I can do it. The transmitter / receiver is not limited to a card shape, and may have another shape. This is the same as in the case of the first embodiment.

  The PC 110 sets an authentication pattern for authenticating the IC card 112 together with identification information individually assigned to the IC card 112. Further, the PC 110 compares the identification information with the authentication pattern, and determines whether or not the IC card 112 can be authenticated based on the result. Note that the authentication pattern setting and the authentication pattern comparison may be performed using separate devices.

  The elements included in the authentication pattern are, for example, the connection order of the circuits 104a to 104c, the connection interval, the connection time, the number of connections, and the like. These can be combined arbitrarily. Only the connection interval and the number of connections can be used as elements of the authentication pattern. In this case, the number of circuits may be one. Moreover, it is good also as an authentication pattern including the transmission of the same circuit in multiple times. The connected time and the connection interval may be set to be shorter than a certain time or may be set to be longer than a certain time.

  FIG. 15 shows an example of the authentication pattern. First, the buttons 116a and 117a of the circuit 114a are pressed at the same time to make a call by the circuit 114a. The transmission by the circuit 114a is continued for t1 seconds or more. Thereafter, the transmission of the circuit 114a is canceled. Then, within t2 seconds, the buttons 116b and 117b of the circuit 114b are pressed at the same time to make a transmission by the circuit 114b. The transmission by the circuit 114b is continued for t3 seconds or more. Thereafter, the transmission of the circuit 114b is canceled. Then, within t4 seconds, the buttons 116c and 117c of the circuit 114c are simultaneously pressed to perform transmission by the circuit 114c. Transmission by the circuit 114c is continued for t5 seconds or more. The PC 110 performs authentication when these patterns are reproduced without delay.

  The user of the IC card 112 operates the button by holding the IC card 112 over the reader / writer 111. The PC 110 reads individual identification information allocated to the IC card and determines whether a preset authentication pattern is reproduced. If the authentication pattern is reproduced, authentication is performed. The PC 110 can be incorporated into a network.

  Thus, by registering a changeable authentication pattern, unauthorized use can be made difficult. The IC card 112 includes a plurality of circuits having different frequencies and / or identification numbers stored in a memory, and further includes a connection time, a connection interval, etc. To increase. Thereby, it is possible to effectively deal with unauthorized use.

  Although the preferred embodiments of the present invention have been described in detail above, the present invention is not limited to the specific embodiments, and various modifications, within the scope of the gist of the present invention described in the claims, It can be changed.

(Appendix)
(Appendix 1)
An antenna that can switch between a communicable state and a communicable state, generates electromotive force by receiving radio waves from the outside in a communicable state, and transmits information to the outside at a preset frequency A circuit forming
A switch group that switches the state of the circuit between a communicable state and a communicable state by a combination of operation states;
Transmitter / receiver with

(Appendix 2)
The circuit is
A main circuit capable of transmitting at the preset frequency by operating one of the switches included in the switch group to be in a conductive state;
The transmitter / receiver according to claim 1, further comprising: a sub-circuit that prevents the transmission at the preset frequency by setting the main circuit in a short-circuited state by being in a conductive state.

(Appendix 3)
The switch group includes:
A first switch group that is operable to place the circuit in a communicable state;
The second switch group that does not affect the communication state of the circuit by being operated or does not affect the communication state of the circuit;
The transmitter / receiver according to appendix 1 or 2, which includes:

(Appendix 4)
A transceiver comprising at least one circuit for transmitting information to the outside at a preset frequency by operating at least one switch;
A transceiver for performing wireless communication with the transceiver;
A control unit that determines whether or not authentication is possible by comparing a pattern of transmission from the transmitter and receiver received by the transmission and reception with a predetermined authentication pattern;
With an authentication system.

(Appendix 5)
An antenna that can switch between a communicable state and a communicable state, generates electromotive force by receiving radio waves from the outside in a communicable state, and transmits information to the outside at a preset frequency A circuit forming
A switch group that switches a state of the circuit between a communicable state and a communicable state by a combination of operation states;
A transceiver for performing wireless communication with the transceiver;
A control unit that determines whether or not authentication is possible by comparing a pattern of transmission from the transmitter and receiver received by the transmission and reception with a predetermined authentication pattern;
With an authentication system.

1, 112 ... IC card (transceiver)
DESCRIPTION OF SYMBOLS 1a ... Card main body 1a1 ... Support | pillar 1a2 ... Partition plate 2 ... Board | substrate 3 ... IC chip 4, 114a, 114b, 114c ... Circuit (main circuit)
5 ... Subcircuits 6, 7, 8, 9, 10, 11, 116a to 116c, 117a to 117b ... buttons (switches)
6a, 8a, 9a, 10a, 11a ... conductive portion 12 ... spherical member (elastic member)
13, 14 ... Spring members (elastic members)
100 ... Authentication system 110 ... PC (control unit)
111 ... Antenna (transmitter / receiver)

Claims (4)

An antenna that can switch between a communicable state and a communicable state, generates electromotive force by receiving radio waves from the outside in a communicable state, and transmits information to the outside at a preset frequency A circuit forming
A switch group that switches the state of the circuit between a communicable state and a communicable state by a combination of operation states;
Transmitter / receiver with The circuit is
A main circuit capable of transmitting at the preset frequency by operating one of the switches included in the switch group to be in a conductive state;
The transmitter / receiver according to claim 1, further comprising: a sub-circuit that prevents transmission at the preset frequency by setting the main circuit in a short-circuited state by being in a conductive state. The switch group includes:
A first switch group that is operable to place the circuit in a communicable state;
The second switch group that does not affect the communication state of the circuit by being operated or does not affect the communication state of the circuit;
The transmitter-receiver of Claim 1 or 2 containing. A transceiver comprising at least one circuit for transmitting information to the outside at a preset frequency by operating a plurality of switches;
A transceiver for performing wireless communication with the transceiver;
A control unit that determines whether or not authentication is possible by comparing a pattern of transmission from the transceiver received by the transceiver with a predetermined authentication pattern;
With an authentication system.

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