JP4992924B2 - IC card and data transmission / reception system - Google Patents

Description

  The present invention relates to an IC card and a data transmission / reception system, and more particularly to an IC card and a data transmission / reception system used for user authentication.

  2. Description of the Related Art Conventionally, there are cases where a method using an RFID (Radio Frequency Identification) tag or an IC card is employed as a method for managing user entry / exit in a building or an office in a building. Specifically, for example, each user owns an RFID tag or an IC card, and when entering or leaving the office, data is transmitted / received using the IC card owned by the user and stored in the computer. The user authentication is performed using the prepared database.

  Here, there are a plurality of types of RFID tags and IC cards depending on the difference in communication distance. For example, there is a HF (High Frequency) band RFID tag which is a 13.56 MHz frequency band with a relatively short communication distance, and an UHF (Ultra High Frequency) band RFID tag which is a 953 MHz frequency band with a relatively long communication distance. .

  Since the HF band RFID tag has a short communication distance, when the HF band RFID tag is used for user authentication as described above, for example, when the user enters or leaves the room, for example, the user himself / herself puts the RFID tag on a reader to It is necessary to read the data stored in. Such a method lacks convenience. In particular, when the number of readers is small relative to the number of users, it is greatly inconvenient.

  On the other hand, since the UHF band RFID tag has a long communication distance, unlike the above-described HF band RFID tag, there is no need to be tricked into the reader when the user enters or leaves the room. However, due to the length of the communication distance, there is a risk of information leakage of the RFID tag, which causes a security problem. That is, since the communication distance is long, there is a possibility that data being communicated may be stolen by a malicious third party not intended by the user or the system designer. In particular, in user authentication, very important personal information may be included in the communication data, which is a big problem.

  Here, Japanese Patent Application Publication No. 2007-531143 (Patent Document 1) discloses an apparatus for transmitting a personal profile. According to Patent Document 1, an apparatus for transmitting a personal profile includes a memory for storing a personal profile, a personal profile selection element, and a transmitter for transmitting a signal. The signal then includes at least one subset of the personal profile selected using the personal profile selection element.

Special table 2007-531143 gazette

  According to Patent Document 1, privacy concerns are addressed by transmitting a signal including at least one subset of a personal profile selected by a personal profile selection element.

  However, when transmitting a signal including a subset, if the subset to be selected, that is, the data to be transmitted is selected by mistake, correct data cannot be transmitted. In this case, not only will an authentication error occur, but unnecessary data will be transmitted, and this data may be leaked. That is, there is a problem from the viewpoint of security due to human error.

  An object of the present invention is to provide an IC card that can improve security.

  Another object of the present invention is to provide a data transmission / reception system capable of improving security.

  The IC card according to the present invention is provided corresponding to each of the memory for storing the first and second data and the first and second data, and can transmit the first and second data, respectively. The first and second switches, and the first and second display units respectively associated with the first and second switches. The first data and the display information on the first display unit are associated with each other. The second data is associated with the display information on the second display unit.

  Preferably, the memory includes first and second memory banks, the first data is stored in the first memory bank, and the second data is stored in the second memory bank. .

  More preferably, the switch releases the lock of the memory bank so that data can be transmitted.

  More preferably, the display information in the first and second display units differs depending on the importance levels of the first and second data.

  Further, an IC card according to the present invention is provided corresponding to at least any one of a plurality of data, a memory for storing a plurality of data, and a switch capable of transmitting the corresponding data, A display unit associated with the switch. Data that can be transmitted by the switch is associated with display information on the display unit associated with the switch.

  Preferably, the switch is constituted by a piezoelectric element.

  More preferably, the communication distance of the IC card is changed by turning on or off the switch.

  More preferably, it includes a variable attenuator that makes the attenuation amount of the transmitted radio wave variable, and the change of the communication distance of the IC card changes the attenuation amount of the radio wave in the variable attenuator according to the on / off of the switch. It is done by.

  More preferably, the IC card includes first notification means for notifying that data has been transmitted.

  As a further preferred embodiment, the IC card is a semi-passive type.

  In another aspect of the present invention, a data transmission / reception system includes an IC card including a memory for storing first and second data, a first reader for reading first data, and a first reader for reading second data. And a second reader. The IC card is provided corresponding to each of the first and second data, and the first and second switches that enable transmission of the first and second data, respectively, and the first and second data And first and second display units respectively associated with the switches. The first data and the display information on the first display unit are associated with each other. The second data is associated with the display information on the second display unit.

  In still another aspect of the present invention, a data transmission / reception system includes an IC card including a memory that stores a plurality of data, and a reader that reads the plurality of data. The IC card is provided corresponding to at least one of the data, and includes a plurality of switches capable of transmitting the associated data and a display unit associated with the switch. Data that can be transmitted by the switch is associated with display information on a display unit attached to the switch.

  Preferably, the IC card includes second notifying means for notifying that if the data can be read by the reader.

  More preferably, the IC card includes third informing means for informing data requested by the reader.

  According to the IC card and the data transmission / reception system having such a configuration, data can be transmitted by the switch provided in the IC card. The reader receives data that can be transmitted. Here, since the display information of the display unit associated with the switch is associated with the data that can be transmitted by the switch, it is possible to greatly reduce the possibility of mistaking the data that can be transmitted and other data. it can. Then, unnecessary data cannot be transmitted. Therefore, the risk of data leakage can be reduced, and security can be improved.

It is a figure which shows the structure of the data transmission / reception system containing the IC card which concerns on one Embodiment of this invention. 1 is a schematic perspective view of an IC card according to an embodiment of the present invention. It is a flowchart which shows the flow of a process at the time of reading by a 1st reader | leader using the data transmission / reception system which concerns on one Embodiment of this invention. It is a flowchart which shows the flow of a process at the time of reading with a 2nd reader | leader using the data transmission / reception system which concerns on one Embodiment of this invention. It is a figure which shows the structure of the IC card which concerns on other embodiment of this invention. It is a figure which shows the case where a user authentication is performed in a state with a long communication distance using the IC card shown in FIG. It is a figure which shows the case where user authentication is performed in the state where communication distance is short using the IC card shown in FIG. It is a schematic perspective view of the IC card which concerns on further another embodiment of this invention.

  Embodiments of the present invention will be described below with reference to the drawings. First, the configuration of a data transmission / reception system including an IC card according to an embodiment of the present invention will be described. FIG. 1 is a diagram showing a configuration of a data transmission / reception system including an IC card according to an embodiment of the present invention. FIG. 2 is a schematic perspective view of an IC card according to an embodiment of the present invention.

  Referring to FIGS. 1 and 2, a data transmission / reception system 11 including an IC card 21 according to the present invention is stored in an IC card 21 including a memory 25 for storing data and a memory 25 included in the IC card 21. A reader 12 that reads data, and a computer 13 that is connected to the reader 12 and performs user authentication and the like based on data read by the reader 12 and data held in a database 14 stored therein. The reader 12 can also store data in the memory 25 by communication. That is, the reader 12 has a writer function for writing data to the IC card 21. The outer shape of the IC card 21 is a rectangular thin plate as shown in FIG. In FIG. 2, the memory 25 included in the IC card 21 is indicated by a dotted line.

  The reader 12 can read data from the IC card 21 located within a predetermined distance, that is, within a range where radio waves emitted from the reader 12 reach. The reader 12 emits a radio wave including a signal within a predetermined range. And the reflected wave from the IC card 21 located in the range which an electromagnetic wave reaches is received. Data is read by a signal included in the received wave. In this way, the reader 12 and the IC card 21 communicate with each other. The IC card 21 is a semi-passive type. That is, the IC card 21 incorporates a battery (not shown), and operates with the energy generated when a signal transmitted from the reader 12 is received and the energy of the built-in battery.

  Next, a specific configuration of the IC card 21 according to one embodiment of the present invention will be described. The IC card 21 includes an antenna 22 for communicating radio waves with the reader 12, a receiving device 23 for receiving radio waves from the antenna 22, a processing device 24 for processing the entire IC card 21, and various data relating to authentication. A memory 25 for storing data, and an LED (Light Emitting Diode) 28 as first and second notification means for notifying the success or failure of data authentication described later and the fact that the data has been transmitted by turning on light, blinking light, etc. including.

  The memory 25 has a plurality of memory banks, and stores data for each memory bank. Here, the memory 25 includes a first memory bank 26 and a second memory bank 27. The first and second memory banks 26 and 27 are in a locked state when first and second switches described later are in an off state. That is, when the first and second switches are off, the data stored in the first and second memory banks 26 and 27 cannot be transmitted, and the first and second memory banks 26 , 27 cannot be read. The first memory bank 26 stores low-importance company information data as the first data, and the second memory bank 27 has high importance as the second data. It is assumed that name information data is stored.

  The IC card 21 is provided corresponding to each of the first and second data, and a first switch 31 that can transmit the first and second data stored in the memory 25 when pressed, And a second switch 32. Each of the first and second switches 31 and 32 has a rectangular thin plate shape as shown by a dotted line in FIG. 2, and is provided so as to be embedded in the IC card 21 having the same rectangular thin plate shape. The first and second switches 31 and 32 are provided in the IC card 21 at a predetermined interval. The first and second switches 31 and 32 are constituted by piezoelectric elements. By doing so, it is possible to reduce the thickness of the IC card 21 including the first and second switches 31 and 32. Therefore, handling and carrying of the IC card 21 are facilitated.

  The pressing portions 33 and 34 of the first and second switches 31 and 32 are provided on the surface 29 side of the thin IC card 21 positioned in the plate thickness direction. When the pressing unit 33 is pressed, the first switch 31 is turned on. When the pressing unit 34 is pressed, the second switch 32 is turned on. In FIG. 2, from the viewpoint of easy understanding, illustration of wiring and the like provided inside the IC card 21 and connected to the first and second switches 31 and 32 is omitted.

  Here, the IC card 21 includes first and second display portions 35 and 36 associated with the first and second switches 31 and 32, respectively. Specifically, a seal-like first display unit 35 is provided so as to cover the central region of the pressing unit 33 in the first switch 31. Similarly, a seal-like second display part 36 is provided so as to cover the central region of the pressing part 34 in the second switch 32. About the 1st display part 35, the display information called "company information" is printed. That is, the company information data as the first data is associated with the display information on the first display unit 35. About the 2nd display part 36, the display information called "name information" is printed. That is, the name information data as the second data and the display information on the second display unit 36 are associated with each other. The display information on the first and second display units 35 and 36 differs depending on the importance of data that can be transmitted by pressing the first and second switches 31 and 32. Here, specifically, the name “important” is printed on the name information on the second display unit 36.

  When the pressing unit 33 of the first switch 31 is pressed, the first switch 31 is turned on, and the lock of the first memory bank 26 included in the memory 25 is released. Then, the data stored in the first memory bank 26 can be transmitted, and the first data stored in the first memory bank 26 can be read by the reader 12. When the pressing unit 34 of the second switch 32 is pressed, the second switch 32 is turned on, and the lock of the second memory bank 27 included in the memory 25 is released. Then, the data stored in the second memory bank 27 can be transmitted, and the second data stored in the second memory bank 27 can be read by the reader 12.

  Here, when the first and second switches 31 and 32 are pressed, the display information of the display units 35 and 36 respectively associated with the first and second switches 31 and 32 and the first and second switches 31 are displayed. , 32 is associated with data that can be transmitted by pressing the key 32, the possibility that the data that can be transmitted is mistaken for other data can be greatly reduced. Then, unnecessary data cannot be transmitted. Therefore, the risk of data leakage can be reduced, and security can be improved.

  Next, a method for authenticating a user in the data transmission / reception system 11 including the IC card 21 according to the present invention will be described. 3 and 4 are flowcharts showing the flow of processing in this case. FIG. 3 is a flowchart showing the flow of processing when reading is performed by the first reader 12 installed at the entrance of the building. FIG. 4 is a flowchart showing a flow of processing when reading is performed by the second reader 12 installed at the entrance of the office in the building.

  With reference to FIG. 1 to FIG. 3, company information is authenticated when entering a building. The user owns the IC card 21 and enters the building. Then, first, the entrance / exit management in the building is performed. In this case, communication is performed between the first reader 12 provided at the entrance of the building and the IC card 21 owned by the user. Specifically, in the first reader 12 installed at the entrance of the building, radio waves are transmitted so that the entrance of the building is within the detection range, and reading is started (step S11 in FIG. 3, hereinafter, steps are omitted). To do). In this case, when the first reader 12 transmits the radio wave, the IC card 21 that has received the radio wave transmits a command for transmitting the building entrance / exit authentication information, here, the company information as the first data. Include in signal. Here, when entering the building, the user presses the first switch 31 of the IC card 21. By depressing the first switch 31, the lock of the first memory bank 26 of the memory 25 storing the company information is released. Then, in response to the signal transmitted from the first reader 12, the company information data stored in the first memory bank 26 of the memory 25 that has been unlocked is transmitted. The first reader 12 receives the transmitted company information data (S12). In this case, the name information as the second data stored in the second memory bank 27 of the memory 25 is not transmitted because the lock of the second memory bank 27 is not released. Here, the display information of the first display unit 35 associated with the first switch 31 and the first data that can be transmitted by pressing the first switch 31 are associated with each other. There is no risk of mistaking data to be used and other data. That is, there is no possibility that the first data and the second data are mistaken. Thereafter, the company information data received by the first reader 12 and the data stored in the database 14 held in the first computer 13 connected to the first reader 12 are collated. In this way, data is transmitted and received, and user authentication is performed (S13). Thereafter, when the data can be read and the authentication is successful, the success of the authentication is notified by turning on the LED 28 (S14). On the other hand, when data is not received (NO in S12) or when authentication fails (NO in S13), an authentication error is notified by blinking of the LED 28 (S15).

  Next, authentication of entrance / exit in an office in a building will be described. When entering the office in the building, the name information as the second data is authenticated. The user owns the IC card 21 and enters the office in the building. Then, entrance / exit management at the entrance of the office is performed. In this case, communication is performed between the second reader 12 provided at the entrance of the office and the IC card 21 owned by the user.

  Specifically, with reference to FIG. 4, the second reader 12 installed at the entrance of the office transmits a radio wave so that the entrance of the office is within the detection range, and starts reading (S21). In this case, when the second reader 12 transmits a radio wave, the IC card 21 that has received the radio wave transmits a command for transmitting office entrance / exit authentication information, here, name information as second data, as a transmission signal. Included. Here, when entering the office, the user presses the second switch 32 of the IC card 21. By depressing the second switch 32, the lock of the second memory bank 27 of the memory 25 storing the name information is released. Then, in response to the signal transmitted from the second reader 12, the name information data is transmitted as the second data stored in the second memory bank 27 of the memory 25 which has been unlocked. The second reader 12 receives the transmitted name information data (S22). Here, the display information of the second display unit 36 associated with the second switch 32 and the second data that can be transmitted by pressing the second switch 32 are associated with each other. There is no risk of mistaking data to be used and other data. That is, there is no possibility that the first data and the second data are mistaken. Thereafter, the name information data received by the second reader 12 is collated with the data held in the database 14 stored in the second computer 13 connected to the second reader 12. In this way, data is transmitted and received, and user authentication is performed (S23). Thereafter, when the data can be read and the authentication is successful, the success of the authentication is notified by turning on the LED 28 (S24). On the other hand, when data is not received (NO in S22) or when authentication fails (NO in S23), an authentication error is notified by blinking of the LED 28 (S25).

  As described above, when the first and second switches 31 and 32 are pressed, the display information of the display units 35 and 36 and the first and second switches respectively associated with the first and second switches 31 and 32 are displayed. Since data that can be transmitted by pressing 31 and 32 is associated with each other, the possibility that the data that can be transmitted is mistaken for other data can be greatly reduced. Then, the data necessary for user authentication can be surely read by the reader 12, and unnecessary data cannot be transmitted. Specifically, in the above case, the name information data required for authentication when entering the office stored in the second memory bank 27 does not leak when entering the building. Therefore, the risk of data leakage can be reduced, and security can be improved.

  In this case, since each of the first and second memory banks 26 and 27 included in the memory 25 is locked, data leakage can be prevented more reliably.

  In the above embodiment, a plurality of switches are provided. However, the present invention is not limited to this, and a configuration including one switch may be used. In this case, for example, data for authenticating the entrance / exit of the building is transmitted / received in a state where the switch is not pressed at all, and the data for authenticating the entrance / exit of the office can be transmitted / received by pressing the switch. It may be configured.

  That is, an IC card according to the present invention is provided with a memory for storing a plurality of data, a switch provided corresponding to at least one of the plurality of data, and capable of transmitting the corresponding data, A display unit associated with the switch, and data that can be transmitted by the switch is associated with display information on the display unit associated with the switch.

  The data transmission / reception system according to the present invention is a data transmission / reception system including an IC card including a memory for storing a plurality of data and a reader for reading the plurality of data, wherein the IC card is at least one of the data. Provided with a plurality of switches that can transmit the associated data and a display unit associated with the switch, and the data that can be transmitted by the switch and the switch are attached to the switch. Display information on the displayed display section is associated with the display information.

  Even in the IC card and the data transmission / reception system configured as described above, unnecessary data cannot be transmitted, so that the risk of data leakage can be reduced and security can be improved.

  Note that the IC card may be configured to change the communication distance by turning on or off the switch. FIG. 5 is a diagram showing a configuration of a data transmission / reception system including an IC card in this case. Referring to FIG. 5, IC card 21 includes a variable attenuator 37 that makes the attenuation amount of the transmitted radio wave variable in addition to the configuration shown in FIG. The variable attenuator 37 can be controlled by the processing device 24, and the change in the communication distance of the IC card 21 changes the amount of radio wave attenuation in the variable attenuator 37 according to whether the switches 31 and 32 are turned on or off. It is done by. That is, the communication distance by the antenna 22 can be lengthened or shortened by changing the amount of radio wave attenuation in the variable attenuator 37. Here, the second switch 32 is turned on to release the lock on the second memory bank 27 and shorten the communication distance. On the other hand, in the ON state by pressing the first switch 31, only the lock of the first memory bank 26 is released, and the communication distance is not changed. That is, even if the first switch 31 is pressed, the communication distance remains long. The other configuration of the IC card 21 is the same as that of the IC card 21 shown in FIG.

  6 and 7 show a case where data is exchanged in the data transmission / reception system including the IC card shown in FIG. FIG. 6 shows a case where the communication distance is long, and FIG. 7 shows a case where the communication distance is short. 6 and 7, the communication distance is indicated by the length of the arrow indicating the communication. 6 and 7, the illustration of the IC card 21 is simplified, and a switch that is pressed in hatching is shown.

  With reference to FIGS. 5 to 7, for example, in the case of user authentication when entering a building as shown in FIG. 3, the communication distance is increased as shown in FIG. Send and receive. In this case, since company information is transmitted and received with low importance, there is no particular problem in terms of security. On the other hand, as for user authentication when entering the office in the building, as shown in FIG. 7, the communication distance is shortened and data is transmitted and received. In this case, since the name information with high importance is transmitted and received, the communication distance can be shortened, and the possibility that the data is stolen can be further reduced. Therefore, security can be further improved.

  In the above embodiment, the communication distance is changed by changing the attenuation amount of the radio wave by the variable attenuator. However, the present invention is not limited to this, and the communication distance is changed by another method. Also good. Specifically, for example, in the IC card having the configuration shown in FIG. 1, a predetermined threshold value is provided for the level of a signal received from the reader, and the predetermined threshold value is changed. The signal below the predetermined threshold is invalidated. In this way, the communication distance may be changed.

  In the above embodiment, the pressing portion is provided on the surface of the thin IC card in the plate thickness direction. However, the present invention is not limited to this, and the switch is pressed in a region orthogonal to the plate thickness direction. It is good also as providing a part. FIG. 8 is a schematic perspective view showing the IC card in this case, and corresponds to FIG.

  Referring to FIG. 8, a thin plate-like IC card 41 is provided corresponding to each of the memory 42 for storing the first and second data and the first and second data. First and second switches 43 and 44 enabling transmission of the first and second data, and first and second display units 45 and 46 associated with the first and second switches 43 and 44, respectively. With. Here, the pressing portions 47 and 48 of the first and second switches 43 and 44 are provided at a predetermined interval in a side surface portion 49 disposed at a position orthogonal to the thickness direction of the IC card 41. . Here, the pressing portions 47 and 48 of the first and second switches 43 and 44 are provided so as to be positioned at approximately the center of the concave portions 50 and 51 provided so as to be recessed from the side surface portion 49 to the inside thereof. Moreover, the 1st and 2nd display parts 45 and 46 are provided in the area | region located in the vicinity of each of the 1st and 2nd switches 43 and 44 in the surface 52 located in a plate | board thickness direction as matching. Yes. Such a configuration may be adopted. In such a configuration, since the recesses 50 and 51 are provided, erroneous pressing of the pressing portions 47 and 48 can be prevented. In addition, the depressions 47 and 48 of the first and second switches 43 and 44 are provided so that the side portions 49 are not provided with the recesses 50 and 51 but protrude from the side portions 49 to the outside of the IC card 41 as they are. You may comprise.

  Further, in the above embodiment, the two pressing portions are provided on one surface side located in the thickness direction of the thin IC card. However, the present invention is not limited to this, and the board of the thin IC card is provided. It is good also as providing a pressing part in both the surfaces located in the thickness direction, ie, the surface, and a back surface, respectively.

  In the above-described embodiment, the case where two data such as company information and name information are transmitted and received by the first and second switches has been described. However, the present invention is not limited to this, and three or more data are transmitted and received. This also applies to the case where

  Further, in the above embodiment, the notification means is used to notify the successful authentication through light using LED as the notification means. However, the present invention is not limited to this. It is good also as performing. Furthermore, the success or failure of authentication may be notified by changing the blinking pattern of light, the color of light, the tone of sound, or the like. Furthermore, when authentication is successful, the LED may be turned on, and the LED may be turned on each time a plurality of offices are entered and authentication is successful.

  In the above-described embodiment, an order is given to the data authentication. For example, if authentication in transmission / reception of the first data is not successful, transmission of the second data is prohibited, and the second memory It may be configured not to unlock the bank. In this case, in the data transmission / reception system shown in FIG. 6 and FIG. 7 described above, data may be exchanged between the first computer and the second computer, and this data may be used. Good.

  Further, in the above-described embodiment, a notification means such as an LED is provided in association with each switch so that the LED associated with the switch that can transmit the requested transmission data is lit. Good. That is, in the configuration shown in FIG. 1 and the like described above, the first LED is provided in the vicinity of the first switch 31 so as to be associated with the first switch 31, and the second switch 32 is associated with the second switch 32. A second LED is provided in the vicinity of. When a command for requesting transmission of data related to company information is received from the reader 12, the first LED is turned on. On the other hand, when a command requesting transmission of data related to name information is received from the reader 12, the second LED is turned on. By doing so, the data requested by the reader 12 can be easily grasped. That is, in the data transmission / reception system according to the present invention, the IC card includes third notification means for notifying data requested by the reader. In this case, for example, the third notification means may be operated by different sounds. Specifically, for example, when a command is received from the first reader and a voice “Please press the company information transmission switch” is issued or a command is received from the second reader, It is good also as a structure which utters the sound "Please press a switch."

  In the above embodiment, the switch is configured by a piezoelectric element. However, the present invention is not limited to this, and for example, a push button system or a toggle switch configuration may be employed. Moreover, a switch is good also as an ON or OFF state by the touch by a touch panel as a touch panel format.

  In the above embodiment, the outer shape of the IC card is a rectangular thin plate. However, the outer shape is not limited to such an outer shape. For example, the IC card has a polygonal shape such as a disk shape or a pentagon shape. Also good.

  In the above embodiment, the IC card is a semi-passive type. However, the present invention is not limited to this, and a passive type or an active type may be used.

  In the above-described embodiment, the data transmission / reception system is used for user authentication. However, the present invention is not limited to this, and the present invention is also applicable to a case where it is used for simple data transmission / reception.

  As mentioned above, although embodiment of this invention was described with reference to drawings, this invention is not limited to the thing of embodiment shown in figure. Various modifications and variations can be made to the illustrated embodiment within the same range or equivalent range as the present invention.

  The IC card and the data transmission / reception system according to the present invention are effectively used when security improvement is required.

  11 data transmission / reception system, 12 reader, 13 computer, 14 database, 21, 41 IC card, 22 antenna, 23 receiving device, 24 processing device, 25 memory, 26, 27 memory bank, 28 LED, 29, 52 plane, 31, 32, 43, 44 Switch, 33, 34, 47, 48 Press part, 35, 36, 45, 46 Display part, 37 Variable attenuator, 49 Side part, 50, 51 Concave part.

Claims (14)

A memory for storing first and second data;
A first switch and a second switch, which are provided corresponding to the first and second data, respectively, and capable of transmitting the first and second data, respectively;
A first and a second display respectively associated with the first and second switches,
The first data and display information on the first display unit are associated with each other,
The second data and display information on the second display unit are associated with each other,
An IC card that changes the communication distance by turning on or off the switch . The memory includes first and second memory banks;
The first data is stored in the first memory bank;
The IC card according to claim 1, wherein the second data is stored in the second memory bank. The IC card according to claim 2, wherein the switch is capable of transmitting data by releasing the lock of the memory bank. The IC card according to any one of claims 1 to 3, wherein display information in the first and second display units is different depending on respective importance levels of the first and second data. The IC card according to claim 1, wherein a communication distance when the second switch is on is shorter than a communication distance due to the on state of the first switch. A memory for storing a plurality of data;
A switch that is provided corresponding to at least one of the plurality of data and that can transmit the corresponding data;
A display unit associated with the switch,
The data that can be transmitted by the switch is associated with the display information in the display unit associated with the switch,
An IC card that changes a communication distance by turning on or off the switch. The IC card according to claim 1, wherein the switch is configured by a piezoelectric element. Includes a variable attenuator that makes the amount of attenuation of the transmitted radio wave variable,
The IC card according to any one of claims 1 to 7 , wherein the communication distance of the IC card is changed by changing a radio wave attenuation amount in the variable attenuator in accordance with turning on or off of the switch. . The IC card according to claim 1, further comprising a first notification unit that notifies that the data has been transmitted. The IC card according to claim 1, wherein the IC card is a semi-passive type. A data transmission / reception system comprising an IC card including a memory for storing first and second data, a first reader for reading the first data, and a second reader for reading the second data. ,
The IC card is provided corresponding to each of the first and second data, and the first and second switches that can transmit the first and second data, respectively,
A first and a second display respectively associated with the first and second switches,
The first data and display information on the first display unit are associated with each other,
The second data and display information on the second display unit are associated with each other,
A data transmission / reception system that changes a communication distance by turning on or off the switch . A data transmission / reception system comprising an IC card including a memory for storing a plurality of data, and a reader for reading the plurality of data,
The IC card is provided corresponding to at least one of the data, and a plurality of switches capable of transmitting the associated data;
A display unit associated with the switch,
The data that can be transmitted by the switch is associated with the display information in the display unit attached to the switch ,
A data transmission / reception system that changes a communication distance by turning on or off the switch . The data transmission / reception system according to claim 11 or 12, wherein the IC card includes a second notifying unit that notifies that the data can be read by the reader. The data transmission / reception system according to any one of claims 11 to 13, wherein the IC card includes third notification means for notifying data requested by the reader.

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