JP2009134422A - Biometrics device and biometrics method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To surely prevent biological information from being erased due to an erroneous operation. <P>SOLUTION: This biometrics device includes: a reading means 8 for reading biological information from the finger of a user; a storage means 9 for storing the biological information of the finger of the user; and a biometrics means 12 for comparing the biological information read by the reading means 8 with biological information stored in the storage means 9 for authentication. Furthermore, the biometrics device also includes an erase start means 22 installed at a position inoperable with the hand including the finger of the user when reading the biological information from the finger by the reading means 8, and configured to start erasing the biological information stored in the storage means 9; and erase execution means 12 and 19 for executing erase processing to erase the biological information from the storage means 9 when the erase start means 22 is operated while the biological information is read from the finger of the user by the reading means 8. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a biometric authentication device and a biometric authentication method.

  Conventionally, as a biometric authentication device, fingerprint data can be registered by inserting a user key into a key holder and placing the user's finger on the fingerprint sensor, and the user key is rotated to a deletion position and read by the fingerprint sensor It is known that a fingerprint can be deleted when it matches registered fingerprint data (see, for example, Patent Document 1).

JP 2003-13646 A

  However, in the conventional biometric authentication device, when the fingerprint of the finger is read by the fingerprint sensor, if the user key is erroneously operated to the deletion position, the registered fingerprint data may be deleted. Further, since the fingerprint data to be deleted is selected according to the difference in the deletion position, there is a risk that other fingerprint data may be deleted by mistake.

  Accordingly, an object of the present invention is to provide a biometric authentication apparatus and a biometric authentication method that can reliably prevent deletion of biometric information due to an erroneous operation.

As a means for solving the above problems, the present invention provides:
Reading means for reading biometric information from the user's finger;
Storage means for storing biometric information of the user's finger;
A personal authentication unit that compares the biometric information read by the reading unit with the biometric information stored in the storage unit to perform personal authentication;
A biometric authentication device comprising:
When reading the biological information from a finger of the user by the reading means, a deletion start means is provided at a position where it cannot be operated with one hand including the finger and starts the deletion processing of the biological information stored in the storage means When,
A deletion execution unit that executes a deletion process for deleting the biological information from the storage unit by operating the deletion start unit while the reading unit is reading the biological information from the user's finger;
It is equipped with.

  With this configuration, when reading the biometric information of a finger by the reading unit, the deletion start unit cannot be operated with the hand with the finger, and the deletion process is erroneously performed unless the deletion start unit is operated with the other hand. Never executed.

Biometric information determining means for determining whether the biometric information read by the reading means is master information;
The deletion execution means may delete all the biological information other than the master information from the storage means if the biological information determination means determines that the information is master information.

  With this configuration, biological information other than the master information can be easily deleted.

Further, the present invention provides a means for solving the above-described problems,
A reading step of reading biometric information from the user's finger;
Comparing the biometric information read in the reading step with the biometric information stored in the storage means, and performing personal authentication;
A biometric authentication method comprising:
When reading biometric information from a finger of a user in the reading step, the biometric information stored in the storage unit is operated by operating a deletion start unit provided at a position where the user cannot operate with one hand including the finger. A deletion start step for starting the deletion process;
In the reading step, in a state where the biological information is read from the user's finger, the deletion start step is executed, thereby deleting the biological information from the storage unit;
Is to execute.

Before the deletion execution step, execute a biological information determination step for determining whether the biological information read in the reading step is master information,
In the deletion execution step, all the biological information other than the master information may be deleted from the storage means by determining that it is master information in the biological information determination step.

  According to the present invention, when the biometric information of the finger is read by the reading means, the deletion start means cannot be operated by the hand with the finger, so that it is possible to reliably prevent a problem that necessary information is deleted due to an erroneous operation. It becomes possible to do.

  Embodiments according to the present invention will be described below with reference to the accompanying drawings.

  FIG. 1 shows a biometric authentication system according to this embodiment. This biometric authentication system is employed in a vehicle and includes a biometric authentication device 1 and a smart entry control unit 2 (hereinafter, the control unit is abbreviated as C / U). The smart entry C / U2 is connected to a door open / close switch 3 (door open / close SW), a door lock C / U4, an electric steering lock 5 (electric STL), an engine C / U6, a start switch 7 (start SW), and the like. ing.

  As shown in FIG. 2, the biometric authentication device 1 includes an imaging unit 8, a first storage unit 9, a first power supply unit 10, a first communication unit 11, and a first control unit 12.

  The imaging unit 8 includes an infrared irradiation unit 13 and a camera unit 14. The infrared irradiation unit 13 includes a plurality of LEDs for irradiating infrared rays, and these LEDs are irradiated with near infrared rays so that a finger vein pattern can be read by the camera unit 14. The camera unit 14 includes a CCD (Charge Coupled Device) camera, a CMOS (Complementary Metal-Oxide Semiconductor) camera, and the like, and reads a vein pattern from a finger irradiated with near infrared rays.

  The first storage unit 9 stores biometric information (here, finger vein pattern) of a user permitted to use the vehicle and ID (identification) data that is identification information in association with each other. Here, one ID data (ID number) corresponds to one person, and one ID data is associated with a plurality of times of reading a vein pattern of a specific finger, and one ID data What is constituted by a plurality of data storing different fingers is stored. For example, the first data, the second, and third biometric recognition results (biological information) for the ID number (1) are stored as the first data, and the ID number (1) is stored as the second data. For the first finger, the second finger and the third finger of the middle finger (biological information) are stored, and as the third data, the first, second, and The result of the third biometric recognition (biometric information) is stored. Further, the first storage unit 9 stores a control program for executing an authentication process described later.

  The first power supply unit 10 supplies power to the imaging unit 8, the first storage unit 9, the first communication unit 11, and the first control unit 12.

  The 1st communication part 11 is for performing transmission / reception of data between smart entry C / U2, and can employ | adopt both a wire communication and a radio | wireless. Here, a connector is used. The first communication unit 11 transmits the result of the personal authentication process performed by the first control unit 12 to the smart entry C / U2.

  The first control unit 12 performs biometric authentication processing as will be described later by collating biometric information captured by the camera unit 14 of the imaging unit 8 with biometric information stored in the first storage unit 9. Execute. The vein pattern is digitized by image processing, and compared with the biometric information registered in the first storage unit 9 (also digitized), it is determined whether the vein pattern is of a registered person.

  The digitization of the vein pattern is performed as follows. That is, near-infrared rays applied to the finger are easily absorbed by reduced hemoglobin flowing through veins in the blood after carrying oxygen. For this reason, the image is dark for the veins and bright for the portions other than the veins. Therefore, the brightness at each part is converted into numerical data of “0” or “1” by the binary system.

  The smart entry C / U 2 includes an input / output unit 15, a second storage unit 16, a second power supply unit 17, a second communication unit 18, and a second control unit 19.

  The input / output unit 15 receives output signals from the door opening / closing SW3, door lock C / U4, electric STL5, engine C / U6, start SW7, remote control 20 (smart entry device), registration button 21, deletion button 22, etc. Conversely, a control signal is transmitted to each C / U to perform a predetermined operation.

  The door opening / closing SW3 outputs an on / off signal when the door is opened / closed. The door lock C / U 4 drives and controls an actuator of a door lock device provided on the door of the vehicle to lock and unlock the door. The electric STL 5 prevents the vehicle from being stolen by locking and unlocking the steering shaft. Here, the internal motor is driven and controlled based on the control signal from the smart entry C / U2, and the steering shaft is locked / unlocked. The engine C / U 6 controls engine start, stop, and operation. The start SW 7 is a switch for starting the engine, and is installed in the vicinity of the steering wheel in the vehicle.

  The remote controller 20 is used for locking and unlocking a vehicle door. That is, when the user gets into the vehicle and touches the door handle is detected by a touch sensor (not shown) provided on the door handle, and an ON signal is output from the touch sensor, a request signal is sent from the smart entry C / U2. Sent. The remote controller 20 receives this request signal and transmits an identification signal registered in advance. The smart entry C / U2 outputs an unlock instruction signal to the door lock C / U4 based on this identification signal, and the door is unlocked.

  The registration button 21 is used when registering biometric information. When the registration button 21 is operated, a registration mode signal is transmitted from the smart entry C / U 2 to the biometric authentication device 1. If the finger vein pattern of the finger is read by the camera unit 14 of the imaging unit 8, the vein pattern can be stored in the first storage unit 9 as biological information.

  As shown in FIG. 3, the delete button 22 is provided at a position where a finger is placed on the imaging unit 8 and cannot be operated by the hand with the finger, and is used when deleting biometric information. Thus, in the state where the biological information is being read from the finger, the user cannot operate the delete button 22 with the hand with the finger, so that the user erroneously operates the delete button 22 to delete necessary data. It is possible to prevent problems in advance.

  The second storage unit 16 stores ID data of a user who is permitted to use the vehicle.

  The second power supply unit 17 supplies power to the input / output unit 15, the second storage unit 16, the second communication unit 18, and the second control unit 19.

  The second communication unit 18 transmits and receives data to and from the first communication unit 11 of the biometric authentication device 1. Here, a connector is used. From the second communication unit 18, a power-on signal, a registration mode signal, and the like are transmitted to the first communication unit 11, and in addition to ID data and biometric information, a verification result and the like are received.

  When the biometric authentication device 1 determines that the biometric authentication result is stored biometric information, the second control unit 19 stores ID data, which is identification information associated with the biometric information, in the second storage unit 16. The door lock C / U4, the electric STL5, and the engine C / U6 are driven and controlled based on input signals from the door opening / closing SW3, the start SW, and the like.

  Next, the operation of the biometric authentication system will be described.

(Registration mode)
In the initial state, since no data is stored in each of the storage units 9 and 16, as shown in FIG. 4, the registration button 21 is operated (step S1) to start a registration mode for registering biometric information. That is, by operating the registration button 21, it is determined whether or not master authentication has been performed in a normal mode to be described later (step S2). In master authentication, the biometric information read by the imaging unit 8 is compared with the biometric information stored as the master in the first storage unit 9, and if they match, the person set as the master has been authenticated. It is what. Whether or not the master authentication has been performed is determined by confirming the authenticated ID data stored in the second storage unit 16 in the normal mode. That is, not everyone can register biometric information, and only a person set as a master can perform registration. Note that biometric information serving as a master can be registered only at a dedicated terminal at a dealer, for example. Even if the registration button 21 is operated, if master authentication is not performed (step S2: NO), a warning (warning) process is executed so that biometric information cannot be registered (step S3). The warning process may be performed by voice, buzzer, lamp lighting, or the like. Moreover, as long as it is equipped with apparatuses, such as a radio | wireless, it can also be comprised so that it may contact other places away from the vehicle. If the master data is registered (step S2: YES), a registration mode signal is transmitted from the smart entry C / U2 to the biometric authentication device 1 (step S4).

  The biometric authentication device 1 starts the registration mode based on the registration mode signal transmitted from the smart entry C / U2 (step S11). That is, when biometric information (vein pattern) is read from the user's finger by the imaging unit 8 (step S12), the read biometric information is binary / encrypted (step S13). Further, ID data is created (step S14). Then, the biometric information and the ID data are associated with each other and stored in the first storage unit 9 (step S15). If stored in the first storage unit 9, the ID data is transmitted to the smart entry C / U2 (step S16). When the next biometric information registration process is performed (step S17), the process returns to step S13 and the same process is repeated.

  The smart entry C / U2 receives the ID data transmitted from the biometric authentication device 1 (step S5) and stores it in the second storage unit 16 (step S6). Here, it waits for 30 seconds (step S7), and during that time, the standby state is maintained (step S8). If 30 seconds have elapsed, a registration end signal is transmitted to the biometric authentication device 1 (step S9).

  The biometric authentication device 1 maintains a standby state (step S19) until a registration end signal is received from the smart entry C / U2 (step S18), and if a registration end signal is received, a series of biometric information registration processing is completed. To do.

(Normal mode)
Processing (normal mode) when the user gets on the vehicle and starts the engine will be described with reference to the flowcharts of FIGS. 5 and 6.

  In the smart entry C / U2, if a signal indicating that the door has changed from the open state to the closed state is input from the door opening / closing SW3 (step S31), the biometric authentication device 1 is turned on. A power-on signal is output (step S32), and an authentication mode activation signal is output (step S33).

  The biometric authentication device 1 initializes data based on the power-on signal from the smart entry C / U2 (step S51), and starts an authentication mode process if an authentication mode activation signal is input from the smart entry C / U2. (Step S52).

  In the authentication mode, first, finger detection is performed to determine whether or not a finger can be imaged by the camera unit 14 of the imaging unit 8 (step S54). If a finger is detected (step S55: YES), imaging is performed by the camera unit 14 (step S56). If a finger is not detected (step S55: NO), finger detection is continued for 30 seconds (step S57). If it is still not detected, the authentication mode is terminated.

  The vein pattern imaged by the camera unit 14 is subjected to image processing by the first control unit 12 (step S58). In the image processing, as described above, each part (for each segment) is converted into numerical data “0” or “1” based on the brightness of the captured vein pattern. And based on the obtained result, it collates with the biometric information memorize | stored in the 1st memory | storage part 9 (step S59). The result obtained by the collation (collation result) and the ID data associated with the corresponding biometric information are transmitted to the smart entry C / U2 (step S60).

  In the smart entry C / U2, by receiving data from the biometric authentication device 1, it is determined whether or not the received ID data is master data and the delete button 22 is operated (step S34). When the received ID data is master data, the delete button 22 is operated to shift to an erase mode to be described later. Accordingly, when another user who does not have biometric information corresponding to the master data performs biometric authentication, it is possible to prevent the user from executing the erasure mode for erasing the biometric information without permission. In addition, when the finger is set with the biometric authentication device 1, as described above, the erasing button 22 cannot be erased with a hand with the finger. It becomes possible to prevent.

  When not entering the erasure mode, it is determined whether or not the erasure button 22 is operated and the biometric information read by the biometric authentication device 1 is stored in the first storage unit 9 (verification OK). Judgment is made (step S35). If the erase button 22 is operated or the collation is inappropriate, the processing in the normal mode is stopped. On the other hand, if the delete button 22 is not operated and the collation is appropriate, after the ID data is confirmed, the authenticated ID data is stored in the second storage unit 16 (step S36), and the ID data In response to the control signal, a control signal is output to each device such as a mirror, a seat, and a steering (step S37). When the start SW 7 is turned on (step S38), an STL release signal is transmitted to the electric STL 5 (step S39).

  In the electric STL5, the steering lock state is released based on the STL release signal, and the unlocked state is set (step S61). Then, an unlock signal is transmitted to the smart entry C / U2 and the engine C / U6 (step S62).

  In smart entry C / U2, the unlock signal from electric STL5 is confirmed (step S40), and ID data is transmitted to engine C / U6 (step S41).

  Engine C / U6 confirms the unlock signal from electric STL5 (step S71), and based on this unlock signal and the ID data from smart entry C / U2, whether or not the steering is unlocked. It is determined whether the ID data is appropriate (step S72). If either condition is not satisfied, the normal mode is terminated, and if both conditions are satisfied, the engine is started (step S73). Then, an engine start signal is transmitted to the smart entry C / U2 (step S74).

  In the smart entry C / U2, the engine start signal transmitted from the engine C / U6 is confirmed (step S42), and the processing in the series of normal modes is terminated.

(Erase mode)
In step S34, if the received ID data is master data and the delete button 22 is operated, the delete mode is executed.

  That is, as shown in FIG. 7, the smart entry C / U 2 transmits an erasing mode signal to the biometric authentication device 1 based on the operation of the erasing button 22 (step S 81) and stores it in the second storage unit 16. The ID data is erased (step S82).

  The biometric authentication device 1 starts the erasure mode by receiving the erasure mode signal transmitted from the smart entry C / U2 (step S91), and associates the biometric information stored in the first storage unit 9 with the biometric information. The ID data is erased (step S92). Here, all the biometric information and data related to the ID data other than the master data are deleted. If the erasure of these data is completed, the result is transmitted to the smart entry C / U2 (step S93).

  The smart entry C / U2 receives the result from the biometric authentication device 1 and confirms whether or not the erasure has been properly performed (step S83). If it is properly erased, the erase mode is terminated, and if it is not erased properly due to some trouble, a warning is given by notifying with a buzzer (step S84).

  However, in the erase mode, all data other than the master data is erased, but the master data may also be deleted. Further, in step S34 in the normal mode, the mode can be shifted to the erasure mode only when the read ID data is master data. However, any one of the biological information stored in the first storage unit 9 can be used. It may be possible to shift to the erase mode. In this case, only the read biometric information may be erased, or other biometric information may be erased. It is also possible not to erase only the master data.

  As described above, in this embodiment, since the biological button is being read from the finger and the hand with the finger cannot operate the erase button 22, the user operates the erase button 22 accidentally and needs data. Can be prevented beforehand. Further, since the operation of the delete button 22 is configured not to shift to the delete mode unless it is performed simultaneously with the reading of the biometric information, the possibility of performing an operation of deleting the biometric information by mistake can be further reduced. . In addition, if the finger is moved during the reading of the biological information by the reading means, the reading may not be performed accurately, so the user needs to suppress the movement of the hand, but this suppresses the movement of the entire body for the user. As a result, it is possible to prevent the delete button 22 that needs to be operated simultaneously at the time of reading from being erroneously operated.

  The biometric authentication device of the present invention is not limited to the configuration of the above embodiment, and various modifications can be made. For example, in the embodiment, each process is executed using the two control units 12 and 19, but each process may be executed by one control unit.

It is a block diagram which shows the example which employ | adopted the biometrics system which concerns on this embodiment for the vehicle. It is a block diagram which shows the detail of the smart entry control unit and biometrics authentication apparatus of FIG. It is the schematic which shows the layout example of the biometrics apparatus of FIG. 1, and an erasure | elimination button. It is a flowchart which shows the processing content of the registration mode in the biometric authentication system which concerns on this embodiment. It is a flowchart which shows the processing content of the normal mode in the biometric authentication system which concerns on this embodiment. It is a flowchart which shows the processing content of the normal mode in the biometric authentication system which concerns on this embodiment. It is a flowchart which shows the processing content of the deletion mode in the biometric authentication system which concerns on this embodiment.

Explanation of symbols

1 ... Biometric authentication device 2 ... Smart entry C / U
3 ... Door open / close switch
4 ... Door lock C / U
5 ... Electric STL
6 ... Engine C / U
7 ... Start SW
8 ... Imaging unit (reading means)
9 ... 1st memory | storage part (memory | storage means)
DESCRIPTION OF SYMBOLS 10 ... 1st power supply part 11 ... 1st communication part 12 ... 1st control part (personal authentication means, deletion execution means)
DESCRIPTION OF SYMBOLS 13 ... Infrared irradiation part 14 ... Camera part 15 ... Input-output part 16 ... 2nd memory | storage part 17 ... 2nd power supply part 18 ... 2nd communication part 19 ... 2nd control part (deletion execution means, biological information determination means)
20 ... Remote control 21 ... Registration button 22 ... Erase button (deletion start means)

Claims (4)

Reading means for reading biometric information from the user's finger;
Storage means for storing biometric information of the user's finger;
A personal authentication unit that compares the biometric information read by the reading unit with the biometric information stored in the storage unit to perform personal authentication;
A biometric authentication device comprising:
When reading the biological information from a finger of the user by the reading means, a deletion start means is provided at a position where it cannot be operated with one hand including the finger and starts the deletion processing of the biological information stored in the storage means When,
A deletion execution unit that executes a deletion process for deleting the biological information from the storage unit by operating the deletion start unit while the reading unit is reading the biological information from the user's finger;
A biometric authentication device comprising: Biometric information determining means for determining whether the biometric information read by the reading means is master information;
The biometric authentication apparatus according to claim 1, wherein the deletion executing unit deletes all biometric information other than the master information from the storage unit when the biometric information determining unit determines that the information is master information. A reading step of reading biometric information from the user's finger;
Comparing the biometric information read in the reading step with the biometric information stored in the storage means, and performing personal authentication;
A biometric authentication method comprising:
When reading biometric information from a finger of a user in the reading step, the biometric information stored in the storage unit is operated by operating a deletion start unit provided at a position where the user cannot operate with one hand including the finger. A deletion start step for starting the deletion process;
In the reading step, in a state where the biological information is read from the user's finger, the deletion start step is executed, thereby deleting the biological information from the storage unit;
A biometric authentication method comprising: Before the deletion execution step, execute a biological information determination step for determining whether the biological information read in the reading step is master information,
4. The biometric authentication method according to claim 3, wherein in the deletion execution step, all of the biometric information other than the master information is deleted from the storage unit when the biometric information determination step determines that the information is master information. 5. .

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