JP2003132031A - Data communication device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a data communication device that performs personal authentication and permits data communication by a simple operation. SOLUTION: The device is comprised of two electrodes 20, 30 disposed to face a human body, a memory part 30 for holding data to be transmitted/ received, a modulation part 40 that modulates data to be transmitted, a voltage impressing part 50 that impresses a voltage between the two electrodes based on a modulation signal from the modulation part, a fingerprint reading part 72, a fingerprint data collation part 73 and a state control part 74 that assumes a state of being capable of data communication if the fingerprint collation part determines the occurrence of a match for fingerprint data.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data communication device, and more specifically, it relates to a first data communication device attached to a human body and a second data communication device scheduled to come into contact with the human body. The present invention relates to a data communication device that performs data communication between devices.

[0002]

2. Description of the Related Art As represented by cash cards,
Conventionally, a combination of a magnetic card and a code number is often used as a means for performing personal identification. However, since the data recorded on the magnetic card can be read relatively easily, the card is apt to be forged, and the password may be stolen at the time of input. Moreover, since the personal identification number often uses a numerical value such as a birthday that is easy for the person to remember, it is easy to guess. Therefore, crime damage caused by systematic card forgery has become a serious problem.

Therefore, a memory card called an IC card capable of encrypting data and restricting access to the data has appeared. However, even in the case of an IC card, the damage caused by so-called "spoofing" when a genuine card is stolen and used by another person cannot be prevented.

On the other hand, in recent years, biometrics (biometrics) has been put into practical use as a completely different means for personal identification in which personal identification is performed by using a characteristic peculiar to each living body such as a fingerprint, a voiceprint, and a retina. Since biometric authentication does not allow “spoofing”, it is an effective means of personal authentication. In particular, among them, the data communication device using a fingerprint has been significantly improved in authentication accuracy and is being reduced in price, so that its range of use is expanding.

However, in a data communication device based on biometric authentication, it is difficult to (1) reduce the false rejection rate and the false acceptance rate to zero, and (2) it takes a long time for the authentication process because of the large amount of data. 3) There is a problem that data cannot be exchanged. Therefore, there has been proposed a data communication device that complements each other's defects by using both data verification using an IC card and biometric authentication.

[0006]

However, in the data communication apparatus using both the data collation using the IC card and the biometric authentication, in order to perform the authentication, the data collating operation using the IC card and the biometric authentication are performed. It is necessary to carry out completely different operations, such as the operation of, which is very troublesome.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a data communication apparatus capable of performing data communication with a simple operation for personal authentication.

[0008]

In order to achieve the above object, the invention according to claim 1 holds two electrodes mounted on a human body and arranged so as to face the human body, and data to be transmitted and received. Storage unit, a modulation unit that modulates data to be transmitted, a voltage application unit that applies a voltage based on the modulation signal from the modulation unit between the two electrodes, and a space between the two electrodes or the two electrodes. Voltage detecting section for detecting a voltage between one side and circuit ground, a demodulating section for demodulating received data from the detected voltage signal, a fingerprint data storing section for storing fingerprint data of at least one person, and a fingerprint reading for reading a fingerprint. Section, a fingerprint data collating section that collates the fingerprint data output from the fingerprint reading section with the fingerprint data in the fingerprint data storage section, and data when the fingerprint data matches in the fingerprint data collating section. A first data communication device having a state control unit for enabling communication, a touch electrode with which the human body can contact, a contact detection unit that detects that the human body has touched the touch electrode, and the touch electrode A voltage detection unit that detects the voltage between the circuit grounds, a demodulation unit that demodulates the received data from the detected voltage signal, a modulation unit that modulates the data to be transmitted, and a modulation signal between the touch electrode and the circuit ground based on the modulation signal. A second data communication device having a voltage application unit for applying a voltage is provided.

According to a second aspect of the present invention, the human body is worn,
Two electrodes arranged to face the human body, a storage unit for holding data to be transmitted and received, a modulator for modulating data to be transmitted, and a modulation signal from the modulator between the two electrodes. A voltage applying section for applying a voltage based on the voltage, a voltage detecting section for detecting a voltage between the two electrodes or between one of the two electrodes and a circuit ground, and a demodulating section for demodulating received data from the detected voltage signal, A fingerprint data storage unit that stores fingerprint data of at least one person, a fingerprint reading unit that reads a fingerprint, and a fingerprint data collation unit that collates the fingerprint data output from the fingerprint reading unit with the fingerprint data of the fingerprint data storage unit. A first data communicator having a state control unit that enables data communication when the fingerprint data matches in the fingerprint data collating unit, and a touch electrode that can be contacted by the human body. A touch detection unit that detects that the human body has touched the touch electrode, a voltage detection unit that detects the voltage between the touch electrode and the circuit ground, and a demodulation unit that demodulates received data from the detected voltage signal, and transmits. It is characterized by comprising a second data communication device having a modulator for modulating data and a voltage applying unit for applying a voltage based on a modulation signal between the touch electrode and the circuit ground.

According to a third aspect of the present invention, in the first or second aspect, when the fingerprint data collating unit matches the fingerprint data, the state control unit is set to enter the data communication enabled state only once. It is characterized by being controlled by.

According to a fourth aspect of the present invention, in the first or second aspect, when the fingerprint data collating unit matches the fingerprint data, the state control unit is set to be in a data communication enabled state only for a certain period of time thereafter. It is characterized in that it is controlled by.

According to a fifth aspect of the present invention, in the first or second aspect, the first data communication device has a mounting detection means for detecting whether or not the device is mounted on a human body,
When the fingerprint data is matched in the fingerprint data collating unit, until the first data communication device is removed from the human body,
It is characterized in that the state control unit controls so that the data communication is possible.

According to a sixth aspect of the present invention, in the fifth aspect, the mounting detecting means is a detection switch.

According to a seventh aspect of the present invention, in the fifth aspect, the mounting detecting means is a temperature sensor.

The invention described in claim 8 is characterized in that, in claim 5, there is at least one set of an infrared light emitting element and an infrared light receiving element.

According to a ninth aspect of the present invention, in the fifth aspect, the attachment detecting means is impedance measuring means for measuring impedance between the two electrodes.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION A data communication apparatus according to an embodiment of the present invention will be described below with reference to FIGS.

FIGS. 1 and 2 are block diagrams showing a data communication device according to a first embodiment of the present invention. The data communication device is a first data communication device 1 worn on a human body,
The second data communication device 2 is provided so as to be connected to or integrated with the device side. FIG. 1 is a block diagram showing a first data communication device 1, and FIG. 2 is a block diagram showing a second data communication device 2.

As shown in FIG. 1, the first data communication device 1 includes a storage unit 30 for holding data to be transmitted, a storage unit 32 for storing fingerprint data as biometric data of a user, and a user. An electrode 10 and an electrode 20 arranged so as to face the body, a voltage applying unit 50 that applies a voltage between the electrode 10 and the electrode 20, and a control unit 70 that controls input / output of data in the storage unit 30. A modulator 4 that modulates the output signal from the controller 70 and outputs the modulated signal to the voltage applying unit 50.
Has 0 and. Further, a fingerprint reading unit 72 for reading the user's fingerprint, a fingerprint data storing unit 32 for storing (registering) one or more fingerprint data, a fingerprint read by the fingerprint reading unit 72, and a fingerprint data storing unit 32 are stored. The fingerprint data collating unit 74 for collating the fingerprint data collating with the fingerprint data and the state control unit 75 for controlling the operating state of the modulating unit 40 or the voltage applying unit 50 based on the result of the fingerprint data collating unit. In addition, separately, a touch electrode 80 of the second communication device 2 described later.
When a human body (such as a hand or a finger) comes into contact with the human body, it has a signal detection unit 60 for detecting the contact.

As shown in FIG. 2, the second data communication device 2 detects a touch electrode 80 that receives signals from the electrodes 10 and 20 of the first data communication device 1 and a reception signal of the touch electrode 80. Voltage detector 100 and voltage detector 100
It has a demodulation section 110 that demodulates the received signal detected in. In addition, separately, a touch sensor 90 for detecting that a human body touches the touch electrode 80, or a voltage for applying a constant voltage (for example, an AC voltage) for detecting the touch on the first communication device 1 side. It has an application unit 120.

Here, the first data communication device 1 is mounted on an arbitrary portion of the user's body. In the present embodiment, a wristwatch type device is taken as an example as shown in FIG. The electrodes 10 and 20 of the first communication device 1 are arranged on the back surface of the wristwatch, and are installed so as to face the user's body when the user wears the first data communication device. The fingerprint reading unit 72 is arranged on the surface of the wristwatch. The electrodes 10 and 20 of the first communication device 1 may be in direct contact with the human body, or may be in a state where they are not in direct contact with clothes or the like.

Next, the operation will be described. FIG. 4 is an overall view showing an outline of the data communication device according to the present embodiment.
This will be described below with reference to FIGS. 1 to 4. First in FIG.
When the user wearing the data communication device 1 of 1 touches the receiving electrode 80 of the second data communication device 2, the first data communication device 1
One of the electrodes 10 and 20 acts as a signal electrode,
The other acts as a reference electrode. Since the circuit ground in the second data communication device 2 is grounded to the ground G, the reference electrode is electrically coupled to the circuit ground in the second data communication device 2 through the human body and the ground. still,
The human body and the ground G are electrostatically coupled. In this way, the signal electrode is electrically coupled to the touch electrode 80, while the reference electrode is electrically coupled to the circuit ground of the second data communication device 2 to form a signal transmission loop. .

Next, the specific operation will be described with reference to the block diagrams of FIGS. 1 and 2. When the user wearing the first data communication device 1 touches the receiving electrode 80 of the second data communication device 2, the data stored in the storage unit 30 in the first data communication device 1 is changed to the control unit. The output signal output by 70 is modulated by the modulator 40, and the modulated signal is transmitted via the voltage application 50 and the electrodes 20 and 30.
In the second data communication device 2, the transmission signal from the first data communication device 1 is received by the touch electrode 80, this reception signal is detected as a voltage signal by the voltage detection unit 100, and this voltage signal is demodulated by the demodulation unit 110. Are demodulated by and input to the control unit 130. The control unit 130 includes an interface for transmitting and receiving data to and from an external device or a device main body including the second data communication device 2, and the demodulated data input to the control unit 130 is transmitted to the device.

The above is the basic operation, but in the present embodiment, as described above, the second data communication device 2 is provided with the touch sensor 90 for detecting that the human body has touched the touch electrode 80, and the second data communication device 2. The communication device 1 side has a voltage application unit 120 that applies a constant voltage (for example, an AC voltage) to detect contact, and the first data communication device 1 has a touch electrode 80 and a human body (hand). It has a signal detection unit 60 for detecting the contact when a finger or the like) makes contact. When the human body touches the touch electrode 80, this touch signal is transmitted from the touch sensor 90 to the control unit 130, and the second data communication device 2 operates. In addition, the steady voltage from the voltage application unit 120 of the second data communication device 2 is applied to one of the electrodes 20 and 30 of the first data communication device 1 (here, the electrode 2
The voltage between 0) and the circuit ground is detected by the signal detection unit 60, and this detection signal is transmitted to the control unit 70 to operate the first data communication device 1. That is, these configurations act as triggers for the operations of the first data communication device 1 and the second data communication device 2.

Next, the fingerprint reading unit 72 and the fingerprint data storage unit 3
2. The operations of the fingerprint data collating unit 73 and the state control unit 74 will be described.

When the user uses the first data communication device 1. Touch the fingerprint reading unit 72 with a finger. And
The fingerprint data collation unit 73 collates the fingerprint read by the fingerprint reading unit 72 with the fingerprint data registered in the fingerprint data storage unit 32 to perform user authentication. The signal of the collation result is transmitted to the state control unit 74, and if the collation results match, the first data communication device 1 is made operable, and if they do not coincide, the first data communication device 1 is made operable. Here, in the present embodiment, the operations of the modulation unit 40 and the voltage application unit 50 are on / off controlled.

That is, it is judged by fingerprint authentication whether or not the user of the first data communication device 1 is an authorized user,
The security in using the first data communication device 1 is improved.

As described above, the user can attach the first data communication device 1 and easily transmit the data possessed by the user to the device through the human body of the user.
It is possible to determine whether or not the user is a legitimate user and to improve the security in the use of the first data communication device 1.

The second embodiment is shown in FIG. In the second embodiment, a detection switch 170 is provided on the back surface of the first data communication device 1 as mounting detection means for detecting whether or not the first data communication device 1 is mounted on the human body. When the user removes the first data communication device 1 after the first data communication device 1 becomes operable by the fingerprint authentication described above, the detection switch 170 is turned off and the operation condition is released. Acts like.

FIG. 6 shows the third embodiment. In the third embodiment, a temperature sensor 180 is provided on the back surface of the first data communication device 1 as a mounting detection means for detecting whether or not the first data communication device 1 is mounted on the human body. When the user removes the first data communication device 1 after the first data communication device 1 becomes operable by the above fingerprint authentication, the temperature sensor 180 detects a temperature change (it becomes low temperature). Then, the operable state is released.

FIG. 7 shows a fourth embodiment. In the second embodiment, a pair of infrared light emitting elements 190 and infrared rays are provided on the back surface of the first data communication device 1 as the attachment detecting means for detecting whether or not the first data communication device 1 is attached to the human body. It has a light receiving element 192. When the user removes the first data communication device 1 after the first data communication device 1 becomes operable by the above fingerprint authentication, the infrared light receiving element 19
The change in the amount of received light of 2 is detected, and the operable state is released.

In addition, the mounting detection means may be a means for measuring the impedance of the human body, and it is possible to communicate only once after the first data communication device 1 becomes operable by fingerprint authentication. The control unit 70 may be provided with a function that enables communication for a certain period of time.

A fifth embodiment is shown in FIGS. 8 and 9. In the first embodiment, data communication (transmission) from the first data communicator 1 to the second data communicator 2 is mainly performed, but in the present embodiment, the first data communicator 1 is used. By providing the demodulator 140 and the modulator 160 in the second data communication device 2, data communication from the second data communication device 2 to the first data communication device 1 is enabled. Regarding the operation, the same operation as that of the first embodiment is performed from the second data communication device 2 to the first data communication device 1.

[0034]

As described above, according to the first aspect of the present invention, the two electrodes mounted on the human body and arranged so as to face the human body, and the memory for storing the data to be transmitted and received. A part, a modulator for modulating data to be transmitted, a voltage applying part for applying a voltage based on the modulation signal from the modulator between the two electrodes, and a part between the two electrodes or one of the two electrodes. A voltage detection unit that detects a voltage between circuit grounds, a demodulation unit that demodulates received data from the detected voltage signal, a fingerprint data storage unit that stores fingerprint data of at least one person, a fingerprint reading unit that reads a fingerprint, A fingerprint data collating unit that collates the fingerprint data output from the fingerprint reading unit with the fingerprint data in the fingerprint data storage unit;
A first data communicator having a state control unit that enables data communication when the fingerprint data matches in the fingerprint data collating unit, a touch electrode with which the human body can contact, and a human body touches the touch electrode. A contact detection unit that detects that a voltage is detected between the touch electrode and the circuit ground, a demodulation unit that demodulates received data from the detected voltage signal, and a modulation unit that modulates data to be transmitted. , And a second data communication device having a voltage application unit that applies a voltage based on a modulation signal between the touch electrode and the circuit ground, so that data authentication can be performed by a simple operation for personal authentication. It was possible to provide a data communication device capable of performing.

According to a second aspect of the present invention, two electrodes attached to the human body and arranged so as to face the human body, a storage section for holding data to be transmitted and received, and a modulation section for modulating the data to be transmitted. And a voltage applying unit that applies a voltage based on the modulation signal from the modulating unit between the two electrodes,
A voltage detection unit that detects a voltage between the two electrodes or between one of the two electrodes and the circuit ground, a demodulation unit that demodulates received data from the detected voltage signal, and a fingerprint that stores fingerprint data of at least one person. A data storage unit, a fingerprint reading unit for reading a fingerprint, a fingerprint data collating unit for collating the fingerprint data output from the fingerprint reading unit with the fingerprint data in the fingerprint data storage unit, and the fingerprint data collating unit for fingerprint data. A first data communication device having a state control unit that makes a data communication possible when the two match, a touch electrode with which the human body can contact, and a contact detection unit that detects that the human body touches the touch electrode. A voltage detector for detecting a voltage between the touch electrode and the circuit ground, a demodulator for demodulating received data from the detected voltage signal, and a modulator for modulating data to be transmitted. When. Thus and a second data communication device and a voltage application unit that applies a voltage based on the modulation signal between the touch electrode and the circuit ground,
The effect that two-way communication is possible is achieved.

According to a third aspect of the present invention, in the first or second aspect, when the fingerprint data is matched by the fingerprint data collating section, the state control section is set so that the data communication is possible only once after that. Since it was controlled by
This has the effect of improving security.

According to a fourth aspect of the present invention, in the first or second aspect, when the fingerprint data is matched by the fingerprint data collating section, the state control section is set so that the data communication is possible only for a certain period of time thereafter. Since the control is performed by, there is an effect that the security can be improved.

According to a fifth aspect of the present invention, in the first or second aspect, the first data communication device has attachment detection means for detecting whether or not the device is attached to a human body, and the fingerprint is provided. When the fingerprint data is matched in the data collating unit, the state control unit controls the data communication enable state until the first data communication device is detached from the human body. There is an effect that can improve.

According to the sixth aspect of the invention, in the fifth aspect, since the mounting detection means is a detection switch, there is an effect that the detection is easy.

According to the seventh aspect of the invention, in the fifth aspect, since the mounting detecting means is a temperature sensor, there is an effect that the detection is easy.

According to the invention described in claim 8, in claim 5, since at least one set of the infrared light emitting element and the infrared light receiving element, there is an effect that the detection is easy.

According to a ninth aspect of the invention, in the fifth aspect, the mounting detecting means is impedance measuring means for measuring the impedance between the two electrodes.
This has the effect of being easy to detect.

[Brief description of drawings]

FIG. 1 is a block diagram showing a data communication device according to a first embodiment of this invention.

FIG. 2 is a block diagram showing a data communication device according to the first embodiment of this invention.

FIG. 3 is a diagram showing one form of the first embodiment of the present invention.

FIG. 4 is an overall schematic diagram according to an embodiment of the present invention.

FIG. 5 is a diagram showing a second embodiment of the present invention.

FIG. 6 is a diagram showing a third embodiment of the present invention.

FIG. 7 is a diagram showing a fourth embodiment of the present invention.

FIG. 8 is a diagram showing a fifth embodiment of the present invention.

FIG. 9 is a diagram showing a fifth embodiment of the present invention.

[Explanation of symbols]

1 First data communication device 2 Second data communication device 10 electrodes 20 electrodes 40 Modulator 72 Fingerprint reader

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Atsuhisa Nishimura             1048, Kadoma, Kadoma-shi, Osaka Matsushita Electric Works Co., Ltd.             Inside the company F-term (reference) 5B085 AA08 AE26                 5J104 KA01 KA17

Claims (9)

[Claims] 1. A pair of electrodes mounted on a human body and arranged so as to face the human body, a storage unit for holding data to be transmitted, a modulator for modulating data to be transmitted, and the two electrodes. A voltage applying unit that applies a voltage based on the modulation signal from the modulating unit, a fingerprint data storage unit that stores fingerprint data of at least one person, a fingerprint reading unit that reads a fingerprint, and a fingerprint reading unit that outputs the fingerprint data. A first fingerprint data collating unit that collates the fingerprint data stored in the fingerprint data storage unit with the fingerprint data in the fingerprint data storage unit; A data communication device, a touch electrode with which the human body can contact, a contact detection unit that detects that the human body has touched the touch electrode, and a voltage detection that detects the voltage between the touch electrode and the circuit ground. And,
A second data communication device having a demodulation unit that demodulates received data from the detected voltage signal, and a data communication device. 2. An electrode attached to a human body, arranged to face the human body, a storage unit for holding data to be transmitted and received, a modulator for modulating data to be transmitted, and the two electrodes. A voltage applying section for applying a voltage based on a modulation signal from the modulating section, a voltage detecting section for detecting a voltage between the two electrodes or between one of the two electrodes and a circuit ground, and a detected voltage signal A demodulation unit for demodulating received data from the device, a fingerprint data storage unit for storing fingerprint data of at least one person, a fingerprint reading unit for reading a fingerprint,
A fingerprint data collating unit that collates the fingerprint data output from the fingerprint reading unit with the fingerprint data in the fingerprint data storage unit, and a state control that enables data communication when the fingerprint data matches in the fingerprint data collating unit. A first data communication device having a portion, a touch electrode with which the human body can contact, a contact detection unit that detects that the human body has touched the touch electrode, and a voltage between the touch electrode and circuit ground. A voltage detection unit that
A demodulator that demodulates the received data from the detected voltage signal,
A second data communication device, comprising: a modulator for modulating data to be transmitted; and a second data communication device having a voltage applying unit for applying a voltage based on a modulation signal between the touch electrode and the circuit ground. Communication device. 3. The state control unit is controlled so that when the fingerprint data matching unit matches the fingerprint data, only once after that, the state control unit controls the data communication enable state. The data communication device according to claim 2. 4. The state control unit is controlled such that when the fingerprint data is matched by the fingerprint data collating unit, a data communication is possible only for a certain period of time thereafter. The data communication device according to claim 2. 5. The first data communication device further comprises a mounting detection means for detecting whether or not the device is mounted on a human body, and when the fingerprint data collating unit matches the fingerprint data, the first data The data communication device according to claim 1 or 2, wherein the state control unit controls the communication device to be in a data communication enabled state until the communication device is removed from the human body. 6. The data communication device according to claim 5, wherein the mounting detection means is a detection switch. 7. The data communication device according to claim 5, wherein the attachment detecting means is a temperature sensor. 8. The data communication device according to claim 5, wherein the mounting detecting means is at least one set of an infrared light emitting element and an infrared light receiving element. 9. The data communication device according to claim 5, wherein the attachment detecting unit is an impedance measuring unit that measures an impedance between the two electrodes.