JP2007307301A - Personal authentication device, method and program for controlling the same, personal authentication system, and recording medium with the program recorded thereon - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a personal authentication device capable of easily and firmly protecting privacy without having a problem held in conventional biometric authentication. <P>SOLUTION: The personal authentication device 10 includes: a detecting part 1 for detecting the vibration of a temporomandibular joint with the movement of the temporomandibular joint by a user; an analyzing part 2 for analyzing a resonance frequency in the skull bone of the user and the vibration amplitude of the resonance frequency, based on the vibration of the temporomandibular joint, as the biological information of the user; and an authenticating part 3 for performing authentication by comparing and collating the resonance frequency and the vibration amplitude given from the analyzing part 2 with the biological information of the user which is previously registered in a registering device 4. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a technique for authenticating an individual using a resonance frequency of a living body, particularly a skull caused by vibration of the temporomandibular joint.

  Current biometric personal authentication technology is represented by fingerprint authentication. However, in criminal investigations, there is a problem that it is easy to obtain an individual's fingerprint by another person and that counterfeiting is possible so that fingerprints are collected at the crime scene. For this reason, in recent years, personal authentication techniques other than fingerprint authentication have been developed.

  For example, a personal authentication technique using a finger blood vessel pattern (for example, see Japanese Patent Laid-Open No. 7-21373) or a personal authentication technique using a vein pattern on the back of a hand (for example, see Japanese Patent Laid-Open No. 10-295664) is known. It has been. These technologies irradiate light on the back of a finger or hand, capture reflected light or transmitted light of the irradiated light, register a blood vessel pattern of the captured image in advance, and this pre-registered blood vessel Personal authentication is performed by matching the pattern with a blood vessel pattern that has been imaged for subsequent authentication.

As other personal authentication technology, a personal authentication technology using an iris or a voice print of the eye is known. Also in these techniques, personal authentication is performed by matching a pattern registered in advance with a pattern captured or measured for subsequent authentication.
Internet <http://itpro.nikkeibp.co.jp/free/NC/NEWS/20050701/163801> Internet <http://www.ecom.jp/qecom/about_wg/wg06/intro/summary2.htm> Internet <http://www3.alpha-net.ne.jp/users/japaco/MV.htm>

  By the way, the above-described personal authentication technology has various problems as described below.

  First, it is possible to forge biometric information. It has been demonstrated that forgery is possible not only in the above-described fingerprint but also in the veins and irises of the eyes (see Non-Patent Document 1). In addition, the DNA pattern of a gene, which is considered to be the ultimate technology in biometric authentication, can be counterfeited by, for example, obtaining a single hair. Furthermore, there is no countermeasure against counterfeiting that is performed by cutting off the biometric authentication site by murderous acts, which can be called ultimate.

  Next, there are problems of reproducibility of biometric information (whether an individual can reproduce the same biometric information repeatedly) and misrecognition. In order to avoid forgery, personal authentication based on voiceprints, writing pressure, and handwriting has been proposed, but there is a problem of reproducibility and misrecognition resulting therefrom. For example, in the case of voiceprint authentication, since the act of utterance is an optional element, it is not necessarily reproducible, and consideration is given to reducing the difference between registration and authentication, that is, to prevent misrecognition. It is disclosed in Non-Patent Document 2 that it is necessary.

  Next, there are resistance and discomfort during biometric information acquisition. For example, in the case of fingerprint authentication, there is a problem such as resistance to fingerprint collection (especially in the past) because the finger needs to touch the sensor directly. In addition, in the case of iris authentication, there is a problem that there is a feeling of fear because light is directly incident on the eye when the iris is acquired.

  Finally, there is a huge amount of processing time and system complexity. For example, in the case of fingerprint authentication and vein authentication, since matching is performed using images, complicated processing such as image rotation, articulation, focus, and edge detection is required. Will be complicated.

  An object of the present invention is to provide a personal authentication device, a personal authentication device control method, and a personal authentication that can easily and firmly protect privacy without causing the above-described problems that have occurred in conventional biometric authentication. An object is to provide a system, a personal authentication device control program, and a recording medium on which the program is recorded.

  A personal authentication device according to the present invention is a personal authentication device that authenticates an individual based on a biological characteristic of a human body, and detects temporomandibular joint vibration caused by a user's temporomandibular joint motion in order to solve the above-described problem. A detection unit, an analysis unit for analyzing at least one of a resonance frequency of the skull of the user and a vibration amplitude of the resonance frequency from the vibration of the temporomandibular joint as the biological information of the user, and the analysis unit An authentication unit is provided that compares and compares at least one of the resonance frequency and the vibration amplitude with the biometric information of the user registered in advance in a registration device, and performs authentication.

  The personal authentication device control method according to the present invention is a personal authentication device control method for authenticating an individual based on a biological characteristic of a human body. A step of detecting temporomandibular joint vibration due to movement, and a step of analyzing at least one of the resonance frequency of the user's skull and the vibration amplitude of the resonance frequency from the temporomandibular joint vibration as the biological information of the user, and analysis Registering the biometric information of the user in a registration device, and comparing and collating at least one of the resonance frequency and the vibration amplitude with the biometric information of the user registered in advance in the registration device, And a step of performing authentication.

  According to the above configuration, the personal authentication device according to the present invention authenticates an individual using at least one of the resonance frequency of the user's skull and the vibration amplitude of the resonance frequency. The resonance frequency and the vibration amplitude are detected by an extremely easy movement called a user's temporomandibular joint movement. The temporomandibular joint movement corresponds to an action in which the user moves his / her upper and lower jaws up and down to make the teeth tick, and the vibration of the temporomandibular joint caused thereby is temporomandibular joint vibration.

  By the way, in the present invention, in order to forge biometric information, the head must be completely copied, and such copying is impossible. In particular, it is difficult to completely replicate the density and shape of the skull, but even if the density and shape of the skull can be completely replicated, the skull is covered with the scalp and face skin. Therefore, it is impossible to replicate in consideration of moisture contained in the skin.

  Further, as means other than duplication, it is possible to record the temporomandibular joint movement sound (sound that makes the above-mentioned teeth ticks) generated by the user's temporomandibular joint movement on the acoustic device. Since the resonance frequency of a reproduction speaker or the like is recorded at the same time, forgery is impossible. That is, in the present invention, it is extremely difficult to forge biometric information.

  Moreover, the resonance state (resonance phenomenon) of the skull occurs in the same manner as an unconscious state, for example, eye blink. Furthermore, the resonance state of the skull due to the vibration of the temporomandibular joint is merely a dynamic operation for detecting the signal with high sensitivity, and the individual cannot intentionally change the resonance state of the skull. That is, in the present invention, the reproducibility of biological information is extremely high.

  In addition to extremely high reproducibility of biological information, the conventional frequency detection technology, specifically frequency counting, is said to be most sensitive in the current measurement technology. For example, voltage and current have three significant digits, but frequency detection has five significant digits. Therefore, in the present invention, the possibility of erroneous recognition of biological information is extremely low.

  In addition, since the temporomandibular joint movement is naturally performed during meals and conversations, there is no person who exhibits resistance and discomfort to move the temporomandibular joint except for the disabled. Therefore, in the present invention, resistance and discomfort during biometric information acquisition do not occur.

  In addition, the temporomandibular joint cannot be vibrated unless the user maintains his life. Therefore, biological information can be applied only when alive. Therefore, in the present invention, ultimate malicious intent can be prevented.

  Although the details will be described later, in the personal authentication device, registration and authentication of a user are performed using a simple numerical quantity such as the detected resonance frequency and vibration amplitude of the skull. Therefore, in the present invention, the apparatus can be downsized and the processing time can be shortened.

  From the above, there is an effect that it is possible to realize a personal authentication device that can easily and firmly protect privacy and a control method thereof without causing the problems that have occurred in conventional biometric authentication.

  In addition to the above-described configuration, the personal authentication device according to the present invention preferably detects the user's temporomandibular joint vibration in a non-contact state with the user.

  For example, in the case of fingerprint authentication in conventional biometric authentication, it is necessary to touch the sensor directly with the finger, as described in the prior art. In general, this sensor is shared among an unspecified number of people. Therefore, there is a problem of resistance to touch a sensor that many people touch (especially for women).

  So, according to said structure, the said detection part can detect a user's temporomandibular joint vibration in a non-contact state to a user. As a result, there is an effect that it is possible to realize a user-friendly personal authentication device without causing the above-described problem of resistance.

  In the personal authentication device according to the present invention, in addition to the above configuration, the detection unit is preferably provided with soundproofing means for preventing noise from being detected.

  With the configuration described above, noise can be prevented from being detected by the detection unit, so that an effect of realizing a personal authentication device with higher authentication accuracy can be achieved.

  The personal authentication device according to the present invention preferably registers the biometric information encrypted when registering the biometric information of the user in the registration device.

  According to said structure, the said personal authentication apparatus encrypts and registers biometric information, when registering a user's biometric information to the said registration apparatus. Thereby, there exists an effect that important biometric information can be prevented from leaking to others.

  In addition to the above configuration, the personal authentication device according to the present invention preferably uses fingerprint authentication, vein authentication, iris authentication, handwriting authentication, writing pressure authentication, voiceprint authentication, and gene authentication in combination.

  According to the above configuration, the personal authentication device includes fingerprint authentication, vein authentication, iris authentication, handwriting authentication, writing pressure authentication, voiceprint authentication, gene authentication, seal authentication, personal face-to-face sign authentication, and photo authentication, etc. The conventional biometric authentication can be used together. Thereby, there is an effect that it is possible to realize a personal authentication device capable of protecting privacy more reliably.

  The personal authentication system according to the present invention includes the personal authentication device and an electronic device connected to the personal authentication device and controlled by an output signal of the personal authentication device.

  Since the personal authentication system has the personal authentication device, it realizes a personal authentication system that can easily and firmly protect privacy without causing problems that have occurred in conventional biometric authentication. There is an effect that can be. As an example of the personal authentication system, an electronic device is, for example, a device that controls opening and closing of a door of a building or the like, and is connected to the personal authentication device regardless of wired or wireless. There is a system in which the door is opened and closed based on an authentication result of the authentication unit of the personal authentication device, which is an output signal of the device.

  In addition to the above-described configuration, the personal authentication system according to the present invention includes a measuring device that measures the number of temporomandibular joint movement sounds generated by the user's temporomandibular joint movement, and the electronic device based on the measurement result of the measuring device. And a control device for controlling the switching operation.

  According to the above configuration, the personal authentication system performs a switching operation of the electronic device based on a measurement device that measures the number of temporomandibular joint movement sounds generated by the user's temporomandibular joint movement and the measurement result of the measurement device. Since it further has a control device to control, the switching operation of the electronic device can be controlled.

  As a specific example, when the electronic device is a television and the user's temporomandibular joint movement sound is measured, for example, twice by the measurement device, the measurement result is sent to the control device, and the control device For example, there is a system for controlling the switching operation of the television by giving a control signal for turning on the power to the television or changing a program currently being broadcast.

  Note that examples of the electronic device include an air conditioner, a lighting fixture, and the like in addition to the television. The switching operation can be power on / off, control of air volume or illuminance, and the like. It goes without saying that such a system is extremely effective for persons with physical disabilities such as the elderly and disabled persons.

  Note that the analysis unit and the authentication unit in the personal authentication device can be executed on a computer by a personal authentication device control program. Further, by recording the personal authentication device control program on a computer-readable recording medium, the personal authentication device control program can be executed on any computer.

  A personal authentication device according to the present invention includes a detection unit that detects temporomandibular joint vibration due to user's temporomandibular joint movement, and the user's biometric information from the temporomandibular joint vibration to the resonance frequency of the user's skull and the resonance. An analysis unit that analyzes at least one of the vibration amplitudes of the frequency, and at least one of the resonance frequency and the vibration amplitude given from the analysis unit is registered in advance in the registration device. It is characterized by having an authentication unit that compares and collates with information and performs authentication.

  This produces an effect that a personal authentication device that can easily and firmly protect privacy can be realized without causing problems that have occurred in conventional biometric authentication.

  An embodiment according to the present invention will be described below with reference to FIGS.

  The skull of a human body has a resonance frequency (natural vibration frequency) defined by the shape and density (see Non-Patent Document 3). The present inventor has proved that there are a plurality of resonance frequencies of the skull and the ratio of the vibration amplitudes of the resonance frequencies is strongly dependent on the individual. The personal authentication device 10 according to the present embodiment is a device that uses the resonance frequency of the skull and its vibration amplitude for personal authentication.

  By the way, in the personal authentication device 10, the resonance frequency and vibration amplitude of the skull are detected by temporomandibular joint vibration caused by the temporomandibular joint motion of the user (user of the personal authentication device 10). In describing this embodiment, first, the point that the resonance frequency and vibration amplitude of the skull are detected by the user's temporomandibular joint vibration will be described. The temporomandibular joint movement corresponds to an action in which the user moves his / her upper and lower jaws up and down to make the teeth tick, and the vibration of the temporomandibular joint caused thereby is temporomandibular joint vibration.

  FIG. 5 shows a cantilever beam 25 which is a simple structural resonance model. As illustrated, only one end (surface a) of the cantilever 25 is bonded and fixed to the rectangular parallelepiped 20. The resonance frequency of the cantilever beam 25 is obtained by the following equation (1).

fr = 0.162 × t / l ² × (Ey / ρ) ^(1/2) (1)
here,
fr: resonance frequency of the cantilever beam t: length (thickness) of the z portion of the cantilever beam 25
l: length of the x portion of the cantilever 25 Ey: Young's modulus of the material of the cantilever 25 ρ: density of the material of the cantilever 25.
Thus, if the material, length, and thickness are defined, the resonance frequency can be obtained.

  Further, the high-order resonance frequency is also obtained by the following equation (2).

fr2 = 6.3 × fr1 (2)
here,
fr1: primary resonance frequency of the cantilever beam fr2: secondary resonance frequency of the cantilever beam 25.

  FIG. 6 shows an example of the resonance frequency of the cantilever 25 in the thermal vibration state, and FIG. 7 shows an example of the resonance frequency of the cantilever 25 in the vibration state. FIG. 8 is a diagram comparing the resonance frequency shown in FIG. 6 (shown by a broken line) and the resonance frequency shown in FIG. 7 (shown by a solid line). In FIG. 6, the horizontal axis represents frequency (kHz) and the vertical axis represents vibration amplitude (μV). In FIGS. 7 and 8, the horizontal axis represents frequency (kHz) and the vertical axis represents vibration amplitude (mV). . In the case of thermal vibration, the cantilever 25 is vibrated by heating the rectangular parallelepiped 20 by some means, and in the case of vibration, the cantilever 25 is vibrated by disposing a vibration element in the rectangular parallelepiped 20.

  From each figure, the resonance frequency of the cantilever 25 does not change between the thermal vibration state and the vibration state, and the vibration amplitude of the resonance frequency increases in the vibration state compared to the thermal vibration state. I understand that. That is, by making the skull in an oscillating state, it can be easily detected as an electrical signal without changing the resonance frequency of the skull.

  By the way, in a human body, sufficient energy is consumed for temporomandibular joint vibration for food intake and the like. This energy consumed is the second largest after the energy consumed for the heat retaining function of the human body. The hardest tissue in the human body is the “teeth”, which is the only point where the skull is exposed. From the above, it can be said that temporomandibular joint vibration is the most effective method for bringing the skull into an oscillating state. In order to pick up overtones that resonate with the skull, it is useful to vibrate the back teeth.

  From the above, the personal authentication device 10 detects the resonance frequency and vibration amplitude of the skull based on the temporomandibular joint vibration caused by the user's temporomandibular joint movement, and performs personal authentication using the detected resonance frequency and vibration amplitude of the skull. Is going. As a result, the personal authentication device 10 does not cause various problems that have occurred in conventional biometric authentication as shown in the above-described conventional technology. This will be specifically described below.

  First, in order to forge biometric information (resonant frequency and vibration amplitude of the skull) in the personal authentication device 10, the head must be completely duplicated, and such duplication is impossible. In particular, it is difficult to completely replicate the density and shape of the skull, but even if the density and shape of the skull can be completely replicated, the skull is covered with the scalp and face skin. Therefore, it is impossible to replicate in consideration of moisture contained in the skin.

  Further, as means other than duplication, it is possible to record the temporomandibular joint movement sound (sound that makes the teeth ticks) generated by the user's temporomandibular joint movement on the audio equipment. For example, forgery is impossible. That is, forgery of biometric information is extremely difficult in the personal authentication device 10.

  Moreover, the resonance state (resonance phenomenon) of the skull occurs in the same manner as an unconscious state, for example, eye blink. Furthermore, the resonance state of the skull due to the vibration of the temporomandibular joint is merely a dynamic operation for detecting the resonance frequency and vibration amplitude of the skull with high sensitivity, and the individual cannot intentionally change the resonance state of the skull. That is, in the personal authentication device 10, the reproducibility of biometric information is extremely high.

  In addition to extremely high reproducibility of biological information, the conventional frequency detection technology, specifically frequency counting, is said to be most sensitive in the current measurement technology. For example, voltage and current have three significant digits, but frequency detection has five significant digits. Therefore, the possibility of erroneous recognition of biometric information in the personal authentication device 10 is extremely low.

  In addition, since the temporomandibular joint movement is naturally performed during meals and conversations, there is no person who exhibits resistance and discomfort to move the temporomandibular joint except for the disabled. Further, as will be described in detail later, the detection unit that detects the user's temporomandibular joint vibration does not necessarily need to be brought into contact with the user. Therefore, in the personal authentication device 10, there is no resistance or discomfort at the time of biometric information acquisition.

  In addition, if the user does not maintain his life, the temporomandibular joint cannot be vibrated, so that biological information can be applied only when he is alive. Therefore, the ultimate malicious intent can be prevented in the personal authentication device 10.

  Next, the personal authentication device 10 will be specifically described. FIG. 1 shows a configuration example of the personal authentication device 10 and a configuration example of a personal authentication system 15 of the personal authentication device 10 and the electronic device 11. The personal authentication device 10 includes a detection unit 1, an analysis unit 2, and an authentication unit 3 as illustrated. And the authentication part 3 is connected to the registration apparatus 4 which registers a user's biometric information.

  The detection unit 1 detects the user's temporomandibular joint vibration, converts the detected temporomandibular joint vibration into an electrical signal (hereinafter referred to as temporomandibular joint vibration signal), amplifies it, and outputs it to the analysis unit 2. In view of the fact that the detection unit 1 has good time response and is easy to use, a piezoelectric sensor may be used. The piezoelectric body does not depend on the characteristics of materials such as inorganic materials (high sensitivity and low cost) and organic materials (flexible, lightweight, and excellent acoustic impedance characteristics with living bodies).

  The detection unit 1 may be provided with soundproofing means for preventing noise from being detected. Thereby, since it can prevent that the detection part 1 detects a noise, authentication precision can be made higher. As the soundproofing means, for example, a soundproofing shutter (a combination of sound absorption, vibration isolation and sound insulating materials is important) is suitable. Furthermore, the detection unit 1 may be in contact with the user or in a non-contact state. When the detection unit 1 is in contact with the user, the vibration amplitude of the temporomandibular joint vibration signal to be detected is increased, so that the possibility of malfunction is reduced and the personal authentication device has high authentication accuracy.

  FIG. 2 shows a configuration example of the detection unit 1 for detecting temporomandibular joint vibration without contact with the user. In order to detect temporomandibular joint vibration without contact with the user, it is desirable that the detection unit 1 has a parabolic shape (parabolic shape detection unit 1a) as illustrated. In addition, it is desirable to provide a bandpass filter (not shown) in order to detect only necessary frequency components. Thus, by making the detection unit 1 non-contact with the user, for example, a sense of resistance (especially for women) that touches a sensor shared among an unspecified number of people, which has occurred in fingerprint authentication, etc. This makes it possible to eliminate the psychological problem of the personal authentication device.

  The analysis unit 2 measures the resonance frequency component and vibration amplitude component of the temporomandibular joint vibration signal obtained from the detection unit 1, and outputs the resonance frequency and vibration amplitude of the user's skull to the authentication unit 3.

  FIG. 3 specifically shows the processing of the analysis unit 2. In the graph shown in the figure, the analysis unit 2 measures the resonance frequency component and the vibration amplitude component of the temporomandibular joint vibration signal obtained from the detection unit 1 (corresponding to the calculation of the peak position and vibration amplitude in the figure). It shows how they are doing. The table shown in the figure shows the results of the above measurement in the analysis unit 2, and shows a plurality of resonance frequencies of the skull and vibration amplitudes of the plurality of resonance frequencies in association with each other. Yes. In the graph, the horizontal axis is frequency (kHz), and the vertical axis is vibration amplitude (mV).

  As shown in the above table, the measurement result of the analysis unit 2 is output to the authentication unit 3. As described above, when the detection unit 1 is not in contact with the user, the analysis unit 2 is preferably configured to be able to measure higher frequencies in order to detect higher-order resonance frequencies.

  Based on the resonance frequency and vibration amplitude of the skull obtained from the analysis unit 2, the authentication unit 3 performs processing such as user registration, authentication, and deletion of biometric information already registered in the registration device 4. For the processing of the authentication unit 3, processing methods such as registration and authentication in a conventional personal authentication system can be used.

  Next, the processing operation of the personal authentication device 10 will be described.

  First, when the user is registered, the user performs temporomandibular joint movement toward the detection unit 1, and the detection unit 1 detects temporomandibular joint vibration due to the temporomandibular joint movement of the user, and the temporomandibular joint vibration signal. Is generated. The analysis unit 2 measures the resonance frequency component and vibration amplitude component of the user's skull from the temporomandibular joint vibration signal obtained from the detection unit 1, and outputs the measurement results as shown in the above table to the authentication unit 3. The authentication unit 3 registers the measurement result in the registration device 4.

  Next, in the case of user authentication, the detection unit 1 generates a temporomandibular joint vibration signal based on the user's temporomandibular joint movement, and the analysis unit 2 displays The resonance frequency component and vibration amplitude component of the skull are measured, and the measurement result is output to the authentication unit 3. The authentication unit 3 reads out biometric information already registered in the registration device 4, compares it with the measurement result, and performs authentication.

  The determination at the time of registration, at the time of authentication, at the time of deletion of biometric information, etc., for example, is further provided with a display unit (not shown) in the personal authentication device 10, and in this display unit, “user registration”, “ Menus such as “user authentication” and “deletion of biometric information” may be displayed, and the user may select one of the menus to perform the above-described operation.

  As described above, in the personal authentication device 10, the authentication unit 3 performs user registration, authentication, and the like using a simple numerical value such as the detected resonance frequency and vibration amplitude of the skull. Therefore, the apparatus can be downsized and the processing time can be shortened.

  In this embodiment, the case where personal authentication is performed using both the resonance frequency and the vibration amplitude of the skull has been described as an example. However, only one of the resonance frequency and the vibration amplitude of the skull is used. Personal authentication may be performed. The processing method in that case is the same as the case of performing personal authentication using both the resonance frequency and the vibration amplitude of the skull.

  Further, when registering biometric information in the registration device 4, it is desirable to register biometric information encrypted. In this case, it is possible to prevent important biological information from leaking to others. The registration device 4 may be provided in the personal authentication device 10. The registration device 4 can be replaced by a recording medium. As this recording medium, for example, a disk system including an optical disk such as a CD-ROM / MO / MD / DVD / CD-R, a card system such as an IC card (including a memory card) / optical card, or a mask ROM / EPROM. A semiconductor memory system such as / EEPROM / flash ROM can be used.

  The personal authentication device 10 is not limited to the configuration described above. For example, a server is provided, the server includes an analysis unit and an authentication unit, the personal authentication device 10 includes a detection unit 1, and the server transmits a temporomandibular joint vibration signal that is a detection result of the detection unit 1, It is good also as a structure provided with the receiving part etc. which receive the authentication result (from the authentication part in the said server) from a server.

  The personal authentication device 10 also uses conventional biometric authentication such as vein authentication, iris authentication, handwriting authentication, writing pressure authentication, voiceprint authentication, gene authentication, seal authentication, face-to-face sign authentication, and photo authentication. be able to. In this case, privacy can be protected more reliably.

  Examples of the personal authentication system 15 include a system in which the electronic device 11 controls opening and closing of a door such as a building, and the door is opened and closed based on an authentication result of the authentication unit 3. The connection between the personal authentication device 10 and the electronic device 11 may be wired or wireless.

  The personal authentication system 15 can be applied to a system (personal authentication system 15a) that performs a switching operation of the electronic device 11. FIG. 4 shows a configuration example of the personal authentication system 15a. As shown in the figure, the personal authentication system 15a is based on the measurement device 13 that measures the number of temporomandibular joint movement sounds generated by the user's temporomandibular joint movement and the measurement result of the measurement device 13. It is the structure provided with the control apparatus 14 which controls switching operation of the electronic device 11.

  As a specific example of the personal authentication system 15a, when the electronic device 11 is a television (hereinafter referred to as TV), and the user's temporomandibular joint movement sound is measured, for example, twice by the measurement device 13, the measurement result Is sent to the control device 14, and the control device 14 gives a control signal for turning on the power to the TV, for example, or changing the program currently being broadcast, and performs a switching operation of the TV. Can be mentioned.

  In addition to the TV, the electronic device 11 in the personal authentication system 15a includes an air conditioner, a lighting fixture, and the like, and as a switching operation, it is possible to turn on / off the power, control the air volume or illuminance, and the like. It goes without saying that such a system is extremely effective for persons with physical disabilities such as the elderly and disabled persons.

  As described above, the personal authentication device 10 authenticates an individual using the resonance frequency and vibration amplitude of the user's skull, and the resonance frequency and vibration amplitude of the skull is extremely easy, ie, the user's temporomandibular joint movement. It is detected by simple movement. Therefore, it is possible to realize a personal authentication device that is highly reliable and safe and easy to use. In addition, since there is no psychological resistance and discomfort, forgery is extremely difficult, and personal authentication with high authentication accuracy can be realized, it can be said that the social significance of the present invention is extremely large.

  The inventor prototypes the personal authentication device 10 using a piezoelectric sensor (detection unit 1), a spectrum analyzer (analysis unit 2), and a personal computer (authentication unit 3).

  Finally, each block of the personal authentication device 10, particularly the analysis unit 2 and the authentication unit 3, may be configured by hardware logic, or may be realized by software using a CPU as follows.

  That is, the personal authentication device 10 includes a central processing unit (CPU) that executes instructions of a control program that implements each function, a read only memory (ROM) that stores the program, and a random access memory (RAM) that expands the program. And a storage device (recording medium) such as a memory for storing the program and various data. An object of the present invention is a recording medium on which a program code (execution format program, intermediate code program, source program) of a control program of the personal authentication device 10 which is software for realizing the functions described above is recorded so as to be readable by a computer. This can also be achieved by supplying the personal authentication device 10 and reading and executing the program code recorded on the recording medium by the computer (or CPU or MPU).

  Examples of the recording medium include a tape system such as a magnetic tape and a cassette tape, a magnetic disk such as a floppy (registered trademark) disk / hard disk, and an optical disk such as a CD-ROM / MO / MD / DVD / CD-R. Card system such as IC card, IC card (including memory card) / optical card, or semiconductor memory system such as mask ROM / EPROM / EEPROM / flash ROM.

  The personal authentication device 10 may be configured to be connectable to a communication network, and the program code may be supplied via the communication network. The communication network is not particularly limited. For example, the Internet, intranet, extranet, LAN, ISDN, VAN, CATV communication network, virtual private network, telephone line network, mobile communication network, satellite communication. A net or the like is available. Also, the transmission medium constituting the communication network is not particularly limited. For example, even in the case of wired such as IEEE 1394, USB, power line carrier, cable TV line, telephone line, ADSL line, etc., infrared rays such as IrDA and remote control, Bluetooth ( (Registered trademark), 802.11 wireless, HDR, mobile phone network, satellite line, terrestrial digital network, and the like can also be used. The present invention can also be realized in the form of a computer data signal embedded in a carrier wave in which the program code is embodied by electronic transmission.

  The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope shown in the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments. Is also included in the technical scope of the present invention.

  It can be suitably used for all fields that require personal authentication, such as financial networks and the Internet (for example, online trading).

It is a block diagram which shows this embodiment and shows the structural example of a personal authentication apparatus and a personal authentication system. It is a figure which shows the structural example of the detection part in the said personal authentication apparatus. It is the figure which showed concretely the process of the analysis part in the said personal authentication apparatus. It is a block diagram which shows the other structural example of the said personal authentication system. It is the perspective view which showed the structural resonance model by a cantilever beam. It is a graph which shows the resonant frequency of the cantilever in a thermal vibration state. It is a graph which shows the resonant frequency of the cantilever in an oscillating state. It is the graph which compared the resonant frequency of the cantilever shown in FIG. 6 and FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Detection part 2 Analysis part 3 Authentication part 4 Registration apparatus 10 Personal authentication apparatus 11 Electronic device 13 Measuring apparatus 14 Control apparatus 15, 15a Personal authentication system

Claims (10)

A personal authentication device for authenticating an individual based on a biological characteristic of a human body,
A detection unit for detecting temporomandibular joint vibration caused by user's temporomandibular joint movement;
An analysis unit that analyzes at least one of the resonance frequency of the user's skull and the vibration amplitude of the resonance frequency from the temporomandibular joint vibration as the biological information of the user,
An authentication unit that performs authentication by comparing at least one of the resonance frequency and the vibration amplitude given from the analysis unit with the biometric information of the user registered in advance in a registration device; A personal authentication device.   The personal authentication device according to claim 1, wherein the detection unit detects vibration of the user's temporomandibular joint in a non-contact state with the user.   The personal authentication device according to claim 1, wherein the detection unit is provided with soundproofing means for preventing noise from being detected.   The personal authentication device according to claim 1, wherein the personal authentication device encrypts and registers biometric information when registering user biometric information in the registration device.   The combination of fingerprint authentication, vein authentication, iris authentication, handwriting authentication, writing pressure authentication, voiceprint authentication, gene authentication, seal authentication, face-to-face sign authentication, and photo authentication The personal authentication device according to any one of the above.   6. A personal authentication system comprising: the personal authentication device according to claim 1; and an electronic device connected to the personal authentication device and controlled by an output signal of the personal authentication device.   The personal authentication system includes: a measuring device that measures the number of temporomandibular joint movement sounds generated by a user's temporomandibular joint movement; and a control device that controls a switching operation of the electronic device based on a measurement result of the measuring device. The personal authentication system according to claim 6, further comprising: A method of controlling a personal authentication device for authenticating an individual based on biological characteristics of a human body,
Detecting temporomandibular joint vibration due to user's temporomandibular joint movement;
Analyzing at least one of the resonance frequency of the user's skull and the vibration amplitude of the resonance frequency from the temporomandibular joint vibration as the biological information of the user;
Registering the analyzed biometric information of the user in a registration device;
And a step of comparing and verifying at least one of the resonance frequency and the vibration amplitude with the biometric information of the user registered in advance in the registration device. Control method.   A personal authentication device control program for operating the personal authentication device according to any one of claims 1 to 5, wherein the personal authentication device control program causes a computer to function as the analysis unit and the authentication unit.   A computer-readable recording medium on which the personal authentication device control program according to claim 9 is recorded.

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