WO2020050117A1 - Dispositif d'authentification biométrique - Google Patents

Dispositif d'authentification biométrique Download PDF

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Publication number
WO2020050117A1
WO2020050117A1 PCT/JP2019/033788 JP2019033788W WO2020050117A1 WO 2020050117 A1 WO2020050117 A1 WO 2020050117A1 JP 2019033788 W JP2019033788 W JP 2019033788W WO 2020050117 A1 WO2020050117 A1 WO 2020050117A1
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WO
WIPO (PCT)
Prior art keywords
biometric information
control unit
registered
authentication device
registered biometric
Prior art date
Application number
PCT/JP2019/033788
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English (en)
Japanese (ja)
Inventor
洋介 大橋
里仁 大脇
喬彦 安藤
恭久 太田
雄哉 後藤
直幸 ▲高▼田
小川　大輔
Original Assignee
株式会社東海理化電機製作所
トヨタ自動車株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社東海理化電機製作所, トヨタ自動車株式会社 filed Critical 株式会社東海理化電機製作所
Publication of WO2020050117A1 publication Critical patent/WO2020050117A1/fr

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/117—Identification of persons
    • A61B5/1171—Identification of persons based on the shapes or appearances of their bodies or parts thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
    • B60R25/20—Means to switch the anti-theft system on or off
    • B60R25/25—Means to switch the anti-theft system on or off using biometry
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/30—Authentication, i.e. establishing the identity or authorisation of security principals
    • G06F21/31—User authentication
    • G06F21/32—User authentication using biometric data, e.g. fingerprints, iris scans or voiceprints
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/117—Identification of persons
    • A61B5/1171—Identification of persons based on the shapes or appearances of their bodies or parts thereof
    • A61B5/1172—Identification of persons based on the shapes or appearances of their bodies or parts thereof using fingerprinting

Definitions

  • the present invention relates to a biometric information authentication device.
  • a start control device including a control unit that executes the control (for example, see Patent Document 1).
  • the control means of the start control device performs a fingerprint collation between the fingerprint read by the fingerprint sensor and a pre-registered fingerprint before executing the start by the start means when the start is instructed by the start switch, If a match is determined, the user is authenticated as a legitimate user, and starting by the starting means is permitted.
  • the control means has a RAM (Random Access Memory) in which the registered fingerprint is stored.
  • An object of the present invention is to provide a biometric information authentication device capable of suppressing improper biometric authentication.
  • a biometric information authentication device has a storage unit that has a plurality of storage areas and stores registered biometric information generated based on a registrant's biometric information in a storage area, and stores registered biometric information.
  • biometric information authentication device that suppresses improper biometric authentication.
  • FIG. 1A is an explanatory diagram of the inside of a vehicle in which a start switch device according to an embodiment is arranged.
  • FIG. 1B is an explanatory diagram illustrating the start switch device according to the embodiment.
  • FIG. 2A is a block diagram of the start switch device according to the embodiment.
  • FIG. 2B is a block diagram of the vehicle.
  • FIG. 2C is an explanatory diagram illustrating a read image read by the biological information sensor of the start switch device according to the embodiment.
  • FIG. 3A is an explanatory diagram illustrating a structure of a nonvolatile memory of the start switch device according to the embodiment.
  • FIG. 3B is an explanatory diagram showing a configuration of registered biometric information stored in a nonvolatile memory of the start switch device according to the embodiment.
  • FIG. 1A is an explanatory diagram of the inside of a vehicle in which a start switch device according to an embodiment is arranged.
  • FIG. 1B is an explanatory diagram illustrating the start switch device according to
  • FIG. 3C is an explanatory diagram showing a state in which the nonvolatile memory of the start switch device according to the embodiment stores the registered biometric information irregularly.
  • FIG. 3D is an explanatory diagram showing a state in which the nonvolatile memory of the start switch device according to the embodiment irregularly stores dummy data and registered biometric information.
  • FIG. 3E is an explanatory diagram showing a message displayed on the main monitor.
  • FIG. 4 is a flowchart illustrating an operation relating to registration of the start switch device according to the embodiment.
  • FIG. 5 is a flowchart illustrating an operation related to biometric authentication of the start switch device according to the embodiment.
  • the biometric information authentication device has a plurality of storage areas, a storage unit that stores registered biometric information generated based on the registrant's biometric information in the storage area, and a registered biometric information storage unit And a control unit for storing the storage areas in an irregular order without storing them in the order in which the storage areas are arranged.
  • this biometric information authentication device since the registered biometric information to be compared at the time of biometric authentication is stored in an irregular order in the storage unit, the contents of the storage unit are copied as compared with the case where they are stored in order. Even if it is used, it becomes difficult to use, and it is possible to suppress improper biometric authentication.
  • FIG. 1A is an explanatory diagram inside a vehicle in which a start switch device according to an embodiment is arranged
  • FIG. 1B is an explanatory diagram illustrating a start switch device according to an embodiment
  • FIG. 2A is a block diagram of a start switch device according to the embodiment
  • FIG. 2B is a block diagram of a vehicle
  • FIG. 2C is a readout read by a biological information sensor of the start switch device according to the embodiment.
  • FIG. 3A is an explanatory diagram showing a structure of a nonvolatile memory of the start switch device according to the embodiment.
  • FIG. 3A is an explanatory diagram showing a structure of a nonvolatile memory of the start switch device according to the embodiment.
  • FIG. 3B is a diagram showing a configuration of registered biometric information stored in the nonvolatile memory of the start switch device according to the embodiment.
  • FIG. 3C is an explanatory diagram showing a state in which the non-volatile memory of the start switch device according to the embodiment stores the registered biometric information irregularly
  • FIG. 3D is a diagram showing the state according to the embodiment.
  • FIG. 3E is an explanatory diagram showing a state where the nonvolatile memory of the start switch device stores dummy data and registered biometric information irregularly
  • FIG. 3E is an explanatory diagram showing a message displayed on the main monitor.
  • the start switch device 1 as a biometric information authentication device is located, for example, as shown in FIG. 1A, in front of a user sitting in a driver's seat, a panel 80 around a steering 84, and between a driver's seat and a passenger's seat. It is arranged on the floor console 81, the steering 84, and the like.
  • the start switch device 1 instructs the vehicle control unit 89 of the vehicle 8 to start or prepare to start the driving device of the vehicle 8 by a push operation (ON operation), and by a push operation (OFF operation) performed thereafter.
  • the stop of the driving device can be instructed.
  • the biometric information authentication device is not limited to the start switch device 1, but can be mounted on a device that performs login, unlock, settlement, and the like by biometric authentication.
  • the start switch device 1 has a plurality of storage areas 5c, for example, as shown in FIGS. 2A and 3C, and stores the registered biometric information 51 generated based on the registrant's biometric information in the storage area 5c.
  • the start switch device 1 includes, as an example, a biological information sensor 2, an extraction unit 3, and a switch unit 4, as shown in FIGS. 1B and 2A.
  • the start switch device 1 includes, for example, a cylindrical main body 10 and operation buttons 12, as shown in FIG. 1B.
  • the operation button 12 is inserted into the opening 102 of the main body 10.
  • the vehicle 8 includes a main monitor 86, a sub monitor 87, an authentication device 88, and a vehicle control unit 89, for example.
  • the main monitor 86 is disposed on the center console 82 as shown in FIG. 1A, but is not limited to this.
  • the main monitor 86 is, for example, a liquid crystal monitor, for displaying based on the display signal S 5 outputted from the vehicle control unit 89.
  • the sub-monitor 87 is disposed on the instrument panel 83 in front as viewed from the driver's seat, as shown in FIG. 1A.
  • the sub monitor 87 is, for example, a liquid crystal monitor, and performs display based on a display signal S 6 output from the vehicle control unit 89.
  • the sub-monitor 87 is not limited to the instrument panel 83, for example, and may be arranged at another place such as a head-up display.
  • the authentication device 88 performs authentication wirelessly with the electronic key 88a carried by the user.
  • communication is performed between the electronic key 88a and the authentication device 88, and the ID (identifier) of the electronic key 88a and the ID registered in the authentication device 88 are transmitted.
  • Authentication starts.
  • the authentication device 88 the establishment of authentication, to generate authentication result information S 7 which is information not hold outputs to the vehicle control unit 89. If the authentication is successful, the vehicle control unit 89 outputs the start switch device 1 the information of users registered in the electronic key 88a as the user information S 8 based on the authentication result information S 7.
  • the vehicle control unit 89 is, for example, a microcomputer including a CPU (Central Processing Unit), a RAM, which is a semiconductor memory, and a ROM (Read Only Memory).
  • the vehicle control unit 89 is electromagnetically connected to the start switch device 1 via a vehicle LAN (Local Area Network) such as CAN (Controller Area Network) or LIN (Local Interconnect Network).
  • vehicle LAN Local Area Network
  • CAN Controller Area Network
  • LIN Local Interconnect Network
  • the biological information sensor 2 is configured to read a fingerprint of the operating finger 9 as the biological information 23, as shown in FIGS. 1B and 2C, for example.
  • the biometric information 23 is not limited to the fingerprint of the operation finger 9 but may be a vein of the operation finger 9 or the like.
  • a sensor configured to read a fingerprint such as an optical type, a capacitance type, an electric field intensity measurement type, a pressure-sensitive type, and a heat-sensitive type is used as the biological information sensor 2. .
  • a sensor configured to read the vein based on the reflected near-infrared radiation is used as the biological information sensor 2.
  • a sensor configured to irradiate visible light and process a captured image to extract a fingerprint and a vein is used as the biological information sensor 2.
  • the biological information sensor 2 of the present embodiment is, for example, a capacitance-type sensor that reads a fingerprint as the biological information 23.
  • the biological information sensor 2 is configured to read the biological information 23 from the operating finger 9 that has contacted the reading surface 20 when the operator contacts the operating surface 120 of the operation button 12.
  • the reading surface 20 may be disposed below the operation surface 120 without being exposed to the operation surface 120. Further, the reading surface 20 is not limited to a rectangle, for example, and may be a circle or an ellipse.
  • the biological information sensor 2 includes, for example, a plurality of detection electrodes arranged in rows and columns in a grid below the reading surface 20. As an example, tens of thousands to hundreds of thousands of the plurality of detection electrodes are formed and arranged at intervals of several ⁇ m to several tens ⁇ m.
  • the biological information sensor 2 scans all the detection electrodes by repeating, for example, reading the capacitance of the detection electrodes arranged in a row while changing the column, and subsequently reading the capacitance of the detection electrodes while changing the row. Is configured.
  • the scanning cycle is, for example, about 100 ms.
  • Biometric information sensor 2 outputs, for example, an electrostatic capacity information S 1 formed on the basis of a plurality of capacitive read by scanning the control unit 5.
  • the capacitance information S 1 is formed, for example, based on the capacitance of one period.
  • the biological information sensor 2 divides the capacitance above a predetermined threshold value into “1”, the capacitance below the threshold value into “0”, and the position of the detection electrode. in association with generating the electrostatic capacity information S 1.
  • Image 22 reading shown in FIG. 2C is obtained the position of the detection electrode of the "1" described above on the basis of the capacitance information S 1 black, the position of the detection electrodes of "0" as a white .
  • the circles in the figure are added to indicate a part of the feature points 6 described later.
  • a read image 22 as shown in FIG. 2C is obtained as an example.
  • the image shown in black in the read image 22 is the read biological information 23.
  • the control unit 5 is configured to select a read image 22 suitable for extracting the characteristic point 6 from the plurality of read images 22 read periodically, for example, after the operation finger 9 touches the reading surface 20. May be.
  • Extraction unit 3 extracts, for example, the feature point 6 performs extraction processing on the capacitance information S 1.
  • This extraction processing is, for example, ridge extraction processing.
  • the feature point 6 is, for example, a center point, a branch point, an end point, a delta, or the like as shown in FIG. 2C, but is not limited thereto.
  • the center point is a point that is the center of the fingerprint.
  • the branch point is a point at which the ridge of the fingerprint branches.
  • An end point is a point where a ridge is broken.
  • Deltas are points where ridges gather from three directions.
  • the extraction unit 3 extracts, for example, these feature points 6, generates an extracted image 30 which is an image of the extracted feature points 6, and outputs the extracted image 30 to the control unit 5.
  • the switch unit 4 is configured as, for example, a rubber dome switch that contacts an end of the operation button 12 opposite to the operation surface 120.
  • the rubber dome switch includes, for example, a rubber dome that generates an elastic force and has a movable contact, and a switch substrate on which the rubber dome is disposed and has a fixed contact facing the movable contact.
  • the start switch device 1 is configured such that, for example, when the push operation is completed, the operation button 12 returns to the initial position by the elastic force of the rubber dome.
  • the control unit 5 is, for example, a microcomputer including a CPU (Central Processing Unit) that performs operations, processing, and the like on the acquired data in accordance with stored programs, a RAM that is a semiconductor memory, a ROM (Read Only Memory), and the like. is there. In the ROM, for example, a program for operating the control unit 5 is stored. The RAM is used, for example, as a storage area for storing calculation results and the like.
  • the control unit 5 has a means for generating a clock signal therein, and operates based on the clock signal.
  • the non-volatile memory 5a has, for example, registered biometric information 51 and an authentication threshold 52, as shown in FIG. 3A.
  • the nonvolatile memory 5a includes, for example, a plurality of unit areas 5b.
  • the unit area 5b is, for example, a minimum area in which data can be stored.
  • the non-volatile memory 5a connects, for example, a plurality of unit areas 5b to form a storage area 5c, and stores the registered biometric information 51 in the storage area 5c.
  • the non-volatile memory 5a is used as a storage unit.
  • the present invention is not limited to this, and another semiconductor memory connected to the control unit 5, an HDD (hard disk drive), or the like may be used.
  • the storage unit may be, for example, rewritable, or may not be rewritable once written. Therefore, the nonvolatile memory 5a is configured as, for example, a RAM or a ROM of the control unit 5.
  • the nonvolatile memory 5a of the present embodiment is a RAM, for example.
  • the registered biometric information 51 is information in which at least a registration number 51a, a registrant name 51b, and a template 51c are associated.
  • the registration number 51a is an identification number given when the control unit 5 stores the registered biometric information 51 in the nonvolatile memory 5a.
  • Registrant name 51b is used for identifying the registrant for registering registered biometric information 51 is generated based on the user information S 8 obtained from the vehicle 8.
  • the template 51 c is created based on the extracted image 30, and mainly includes the feature points 6. Note that the registered biometric information 51 is generated for each biometric information 23 of the finger registered by the user.
  • the control unit 5 compares, for example, the template 51c of the registered biometric information 51 stored in the nonvolatile memory 5a with the extracted image 30 from which the characteristic points 6 are extracted, and determines the position of the characteristic points 6 and the position between the characteristic points 6. The degree of similarity is calculated based on the distance between the objects. Then, the control unit 5, if the degree of similarity is not authenticated threshold 52 or more, and outputs an instruction signal S 3 as biometric authentication is successful.
  • the authentication threshold value 52 is defined as, for example, 80% of the number of feature points 6 used for authentication. That is, for example, when the number of feature points 6 of the extracted image 30 used for authentication is 80, the control unit 5 registers the user if 64 or more feature points 6 match the feature point 6 of the template 51c. Is determined to be a person. Note that the match includes matching such as the position of the feature points 6 and the distance between the feature points 6.
  • the biometric authentication is not limited to the authentication method using the similarity of the feature points 6, but may be an authentication method such as pattern matching.
  • Control unit 5 controls the biometric information sensor 2 to scan the reading surface 20 a switching signal S 2 output from the switching unit 4 as a trigger.
  • the contact area of the operation finger 9 on the reading surface 20 is larger than when the operation surface 120 is touched before the push operation, and more feature points 6 can be extracted.
  • Control unit 5 outputs a notification signal S 4 indicating that the biometric authentication was not established to the vehicle control unit 89.
  • the vehicle control unit 89 for example, to display a message image 861 indicating that at least one of the authentication was not established for the main monitor 86 and the sub-monitor 87 based on the notification signal S 4 inputted.
  • FIG. 3E shows a case where a message image 861 is displayed on the display screen 860 of the main monitor 86 as an example.
  • the message image 861 is, for example, "authentication is established” for notifying that biometric authentication has been established.
  • the message image 861 is, for example, is displayed based on the instruction signal S 3 which biometric authentication is outputted satisfied.
  • the control section 5 when storing the registered biometric information 51 in the non-volatile memory 5a, the control section 5 does not store the stored biometric information 51 in the order in which the storage areas 5c are lined up. Rearrange and memorize. Further, the control unit 5 stores the registered biometric information 51 by changing the size irregularly. Further, the control unit 5 assigns a registration number 51a to the registered biometric information 51, stores the registered biometric information 51 in the storage area 5c in an irregular order, and reads the registered biometric information 51 from the nonvolatile memory 5a based on the registration number 51a. Is configured.
  • the order in which some of the storage areas 5c of the nonvolatile memory 5a are arranged is indicated by numerals 1 to 15.
  • the registered biometric information 51 stored in the storage area 5c is described as, for example, data 1 to data 15 as shown in FIGS. 3C and 3D.
  • the control unit 5 When storing the registered biometric information 51 in the non-volatile memory 5a, the control unit 5 does not store the storage areas 5c in the order in which the storage areas 5c are arranged, that is, sequentially from the numeral 1, but stores them in an irregular order.
  • the registered biometric information 51 is stored regularly, for example, “data 1” is stored in “1”, “data 2” is stored in “2”, and “data 15” is stored in “15” in that order.
  • Control unit 5 for example, when the biometric authentication to identify the user's electronic key 88a on the basis of the user information S 8, identifies a storage area 5c on the basis of the registration number 51a granted in connection with the specified user At the same time, the registered biometric information 51 is read, and biometric authentication is performed.
  • control unit 5 adds dummy data to the registered biometric information 51, and changes the size of the registered biometric information 51 irregularly to be stored.
  • the width of the storage area 5c in FIGS. 3C and 3D indicates the size of the registered biometric information 51.
  • control unit 5 is provided with a unique function for each control unit, and uses this function to rearrange the registered biometric information 51 irregularly or to change the size of the registered biometric information 51. Be composed. Further, as a modified example, for example, a unique number is set for each control unit, and the control unit 5 may randomly rearrange or change the size using this number. Further, the control unit 5 may use, for example, a combination of unique functions and numbers.
  • a third party copies the contents of the non-volatile memory of the start switch device of the own vehicle and copies it to the non-volatile memory of the start switch device of the other vehicle, if they are arranged in order, the other person's vehicle Biometric authentication may be established.
  • the registered biometric information 51 is stored in an irregularly arranged manner, so that even if the biometric information 23 is read by another control unit, it is compared with the read biometric information 23. It is not known where the biometric information 51 is stored, and biometric authentication is not established.
  • control unit 5 may store dummy data 510 that is not the registered biometric information 51 in the storage area 5c.
  • the registered biometric information 51 and the dummy data 510 are rearranged irregularly and stored in the storage area 5c, unauthorized use becomes more difficult.
  • FIG. 4 illustrates an example of an operation from generation of the registered biometric information 51 to storage thereof.
  • control unit 5 irregularly selects a storage area 5c for storing the registered biometric information 51 to be registered (Step 2).
  • the control unit 5 selects the storage area 5c based on, for example, a unique function.
  • control unit 5 identifies the user based on the user name of the specified user and the selected storage area 5c and generates a registration number 51a specifying the storage area 5c (Step 3).
  • control unit 5 generates the registered biometric information 51 by associating the registration number 51a, the registrant name 51b, and the template 51c (Step 4).
  • the control unit 5 further irregularly changes the size of the registered biometric information 51.
  • control unit 5 stores the generated registered biometric information 51 in the selected storage area 5c (Step 5), and ends the registration operation.
  • Step 10 the biometric information sensor
  • the capacitance information S 1 obtained from the second information 2 is output to the extraction unit 3 to generate an extracted image 30.
  • control unit 5 to identify the user based on the user information S 8 acquired, the registered biometric information 51 in which the user registers from the nonvolatile memory 5a based on the registration number 51a which was subjected to the user identified Reading is performed (Step 11).
  • control unit 5 compares the extracted image 30 with the read template 51c of the registered biometric information 51, calculates the similarity, and performs biometric authentication.
  • Control unit 5 if the similarity is a the authentication threshold value 52 or more established biometrics (Step12; Yes), it generates an indication signal S 3 indicating the establishment of detection and biometric push operation output Then, the driving device is driven (Step 13), and the biometric authentication ends.
  • the vehicle control unit 89 drives the drive unit based on an instruction signal S 3 input, biometrics displays a message image 861 indicating that it has established on the main monitor 86.
  • control unit 5 in step 12 if the biometric authentication was not satisfied (Step12: No), displays a message image 861 indicating that it was not satisfied and outputs a notification signal S 4 indicating the unsatisfied (Step14).
  • the vehicle control unit 89 displays a message image 861 indicating that the biometric authentication was not satisfied the main monitor 86 based on the notification signal S 4 inputted.
  • the start switch device 1 can suppress improper biometric authentication. Specifically, the start switch device 1 stores the registered biometric information 51 to be compared at the time of biometric authentication in the nonvolatile memory 5a in an irregular order. However, even if the contents of the non-volatile memory 5a are copied, it is difficult to use the contents, and it is possible to suppress improper biometric authentication.
  • the start switch device 1 changes the size of the registered biometric information 51 irregularly, it becomes more difficult to read the registered biometric information 51 as compared with a case where this configuration is not used, and suppresses improper biometric authentication. be able to.
  • the start switch device 1 can be used in other devices because the registered biometric information 51 and the like are stored irregularly for each device that performs biometric authentication. And high security.
  • the start switch device 1 Since the start switch device 1 stores the dummy data and the registered biometric information 51 in an irregular manner in the nonvolatile memory 5a, the start switch device 1 is used even if the contents of the nonvolatile memory 5a are copied, as compared with the case where this configuration is not adopted. This makes it more difficult to further suppress fraud in biometric authentication.

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Abstract

L'invention porte sur un dispositif interrupteur de démarrage 1 servant de dispositif d'authentification biométrique, qui comprend : une mémoire non volatile 5a qui comporte une pluralité de régions de stockage 5c et stocke dans les régions de stockage 5c des informations biométriques enregistrées 51 générées sur la base d'informations biométriques d'une personne inscrite ; et une unité de commande 5 qui, lors du stockage des informations biométriques enregistrées 51 dans la mémoire non volatile 5a, amène les informations biométriques enregistrées 51 à être stockées dans un ordre irrégulier, au lieu d'être stockées dans l'ordre dans lequel les régions de stockage 5c sont agencées.
PCT/JP2019/033788 2018-09-04 2019-08-28 Dispositif d'authentification biométrique WO2020050117A1 (fr)

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JP2018165272A JP2020038492A (ja) 2018-09-04 2018-09-04 生体情報認証装置

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