JP2020069966A - Vehicle authentication system, portable terminal, and control program - Google Patents

Abstract

To improve security while improving convenience in start permission of a travel driving source of a vehicle.SOLUTION: A portable terminal 4 comprises: a fingerprint information acquisition part 401 for acquiring fingerprint information of a user; a memory processing part 402 which makes a memory part 42 store the fingerprint information acquired by the fingerprint information acquisition part 401; a sound recognition part 403 for recognizing an answer back sound emitted when a vehicle door is unlocked; and a transmission control part 404 which is triggered upon recognition of the answer back sound by the sound recognition part 403 to read out the fingerprint information stored in the memory part 42 and transmits it to a BCM which performs fingerprint authentication to collate the fingerprint information with authentic fingerprint information and permits starting of a travel driving source of the vehicle in the case that the fingerprint authentication is successful.SELECTED DRAWING: Figure 4

Description

  The present disclosure relates to a vehicle authentication system, a mobile terminal, and a control program.

  2. Description of the Related Art Conventionally, there has been known a technique in which establishment of fingerprint authentication is a condition for starting a traveling drive source of a vehicle in order to prevent vehicle theft. For example, in Patent Document 1, the fingerprint sensor of the electronic key is used to read the user's fingerprint and the fingerprint information is transmitted to the vehicle side device, and the vehicle side device determines whether the fingerprint information belongs to the user or the vehicle side device. A technique for permitting engine start is disclosed. In the technique disclosed in Patent Document 1, fingerprint information of a fingerprint read by a fingerprint sensor of an electronic key is stored in a memory, and when a request signal transmitted from a vehicle-side device is received by the electronic key, the information is output from the memory. Fingerprint information is read out and an answer signal containing this fingerprint information is transmitted to the vehicle side device. Further, in the technique disclosed in Patent Document 1, the fingerprint information stored in the memory is erased when the answer signal is transmitted or when the permission time such as one hour elapses.

JP, 2006-152730, A

  In the technique disclosed in Patent Document 1, the fingerprint can be read by the electronic key without being read by the fingerprint sensor provided in the vehicle. Therefore, by reading the fingerprint in the room before riding, even if the finger gets wet by touching the wet outer door handle when riding in the rain, unlike when reading the fingerprint with the fingerprint sensor provided in the vehicle, It is considered that the convenience is improved because the problem that the fingerprint becomes difficult to read due to the finger getting wet does not occur. However, in the technique disclosed in Patent Document 1, a third party uses a relay to indirectly communicate with the electronic device and the vehicle-side device until the fingerprint information stored in the memory of the electronic key is erased. If it is realized, there is a problem that the engine start is permitted even though the legitimate user does not intend.

  An object of this disclosure is to provide a vehicle authentication system, a mobile terminal, and a control program that can improve security while improving the convenience of permitting the start of a vehicle drive source. It is in.

  The above objective is achieved by a combination of features described in independent claims, and the subclaims define further advantageous embodiments of the disclosure. The reference numerals in parentheses in the claims show the correspondence with the specific means described in the embodiments described later as one aspect, and do not limit the technical scope of the present disclosure. ..

  In order to achieve the above object, the vehicle authentication system of the present disclosure is used in a vehicle that outputs an answerback sound when a door is unlocked, and a mobile terminal (4) carried by a user and a vehicle used in the vehicle. A vehicle authentication system including a side device (30), wherein the mobile terminal stores a fingerprint information acquisition unit (401) that acquires fingerprint information of the user and a fingerprint information acquisition unit that acquires the fingerprint information by the storage unit (42). A storage processing unit (402) for storing in the storage unit, a sound recognition unit (403) for recognizing an answerback sound, and a transmission control unit (404) for reading fingerprint information stored in the storage unit and transmitting the fingerprint information to the vehicle side device. The transmission control unit reads the fingerprint information stored in the storage unit and causes it to be transmitted when the answer recognition sound is recognized by the sound recognition unit as a trigger, and the vehicle-side device is transmitted from the mobile terminal. A mobile information acquisition unit (307) that acquires fingerprint information, a fingerprint authentication unit (308) that performs fingerprint authentication by matching fingerprint information acquired by the mobile information acquisition unit with regular fingerprint information, and fingerprint authentication by the fingerprint authentication unit. When the above condition is satisfied, the vehicle driving drive source is permitted to start, and when the fingerprint authentication by the fingerprint authentication unit is not satisfied, the vehicle driving drive source is not permitted to be started.

  In order to achieve the above object, the portable terminal of the present disclosure is used in a vehicle that outputs an answerback sound when the door is unlocked, and permits the start of the vehicle drive source depending on whether fingerprint authentication is established. A portable terminal (4) carried by a user, capable of exchanging information via a wireless communication with a vehicle-side device (30) for switching whether or not to perform, and a fingerprint for acquiring fingerprint information of the user. An information acquisition unit (401), a storage processing unit (402) for storing the fingerprint information acquired by the fingerprint information acquisition unit in a storage unit (42), a sound recognition unit (403) for recognizing an answerback sound, and a storage unit. And a transmission control unit (404) for reading the fingerprint information stored in the device, collating the fingerprint information with regular fingerprint information, and transmitting the fingerprint information to a vehicle-side device that performs fingerprint authentication. Answer in part A trigger to the recognition of sound to transmit reads the fingerprint information stored in the storage unit.

  To achieve the above object, the control program according to the present disclosure is used in a vehicle that outputs an answerback sound when a door is unlocked, and permits starting of a traveling drive source of the vehicle depending on whether fingerprint authentication is established. The fingerprint of the user's fingerprint information is acquired by using the computer of the mobile terminal (4) carried by the user, which is capable of exchanging information via the wireless communication with the vehicle side device (30) for switching whether to perform the fingerprint information. An information acquisition unit (401), a storage processing unit (402) for storing the fingerprint information acquired by the fingerprint information acquisition unit in a storage unit (42), a sound recognition unit (403) for recognizing an answerback sound, and a sound recognition When the answerback sound is recognized by the unit, the fingerprint information stored in the storage unit is read, and the fingerprint information is compared with the legitimate fingerprint information and transmitted to the vehicle-side device that performs fingerprint authentication. To function as a signal control unit (404).

  According to these, in the mobile terminal, the fingerprint information acquisition unit acquires the fingerprint information of the user, the storage processing unit stores the fingerprint information in the storage unit, and the transmission control unit stores the fingerprint information stored in the storage unit. The information is read and transmitted to the vehicle side device. Therefore, it is not necessary to read the fingerprint with the fingerprint sensor provided in the vehicle, and it is possible to avoid the problem that the finger becomes wet and difficult to read even in rainy weather. The vehicle-side device performs fingerprint authentication by collating the fingerprint information transmitted from the mobile terminal with the regular fingerprint information, and determines whether to permit the start of the driving source of the vehicle depending on whether fingerprint authentication is established. Since switching is performed, according to the above configuration, it is possible to improve the convenience of permission to start the traveling drive source of the vehicle.

  In addition, the transmission control unit causes the sound recognition unit to recognize the answerback sound when the vehicle door is unlocked, and causes the fingerprint information stored in the storage unit to be read and transmitted. The fingerprint information is not transmitted unless the vehicle is approached within a distance recognizable by the sound recognition unit. Therefore, it is possible to reduce the chances of stealing fingerprint information. Further, even if the third party attempts to illegally transmit the fingerprint information by relaying the answerback sound using the relay device, the user can recognize the answerback sound. The user becomes aware of what has been done and can take measures against the theft of the vehicle. As a result, it becomes possible to improve the security while improving the convenience of permitting the starting of the traveling drive source of the vehicle.

1 is a diagram showing an example of a schematic configuration of a vehicle authentication system 1. It is a figure which shows an example of a schematic structure of the electronic key 2. It is a figure which shows an example of a schematic structure of the vehicle side unit 3 and BCM30. It is a figure which shows an example of a schematic structure of the portable terminal 4. It is a sequence diagram which shows an example of the flow of the authentication relevant process in the vehicle authentication system 1. 9 is a flowchart showing an example of the flow of authentication-related processing in the mobile terminal 4 according to the second embodiment.

  A plurality of embodiments for disclosure will be described with reference to the drawings. Note that, for convenience of description, between a plurality of embodiments, parts having the same functions as the parts shown in the drawings used in the above description are denoted by the same reference numerals, and the description thereof may be omitted. is there. For the parts denoted by the same reference numerals, the description in other embodiments can be referred to.

(Embodiment 1)
<Schematic configuration of vehicle authentication system 1>
Hereinafter, Embodiment 1 of the present disclosure will be described with reference to the drawings. The vehicle authentication system 1 shown in FIG. 1 includes an electronic key 2 carried by a user, a vehicle side unit 3 used in a vehicle, and a mobile terminal 4 carried by a user carrying the electronic key 2.

  In the vehicle authentication system 1, code matching is performed between the electronic key 2 and the vehicle-side unit 3 via wireless communication, and locking / unlocking of the vehicle door is permitted based on the fact that the code verification is successful. .. Further, in the vehicle authentication system 1, the vehicle side unit 3 acquires the user's fingerprint information transmitted from the mobile terminal 4, and based on the fact that the fingerprint authentication based on this fingerprint information is established, the vehicle drive source is started. Allow

<Schematic configuration of electronic key 2>
Next, the electronic key 2 will be described with reference to FIG. As shown in FIG. 2, the electronic key 2 includes a controller 20, an LF receiver 21, and an RF transmitter 22. The electronic key 2 is a so-called Fob.

  The LF receiving unit 21 has an LF receiving antenna, and receives a request signal transmitted from an LF transmitting antenna 31 described later on an LF (Low Frequency) band radio wave. The request signal received by the LF receiving unit 21 includes, for example, a challenge signal requesting transmission of a code for code verification. The challenge signal is a signal for cryptographic communication and is a code signal made up of random numbers. The LF band is, for example, a frequency band of 30 kHz to 300 kHz. The LF reception unit 21 generates a reception signal while electrically processing the received signal, and outputs the generated reception signal to the control unit 20.

  The RF transmitter 22 has an RF transmitter antenna, electrically processes the original signal input from the controller 20, and generates a response signal to the signal received by the LF receiver 21. Is transmitted from the UHF transmission antenna on the radio wave in the RF band. In the present embodiment, the following description will be made on the assumption that the response signal is transmitted on the UHF band of the RF band. The UHF band is, for example, an ultra-high frequency band of 300 MHz to 3 GHz.

  The control unit 20 is an IC, a microcomputer, or the like, and when the reception signal of the request signal is input from the LF reception unit 21, generates the original signal of the response signal according to the request signal and outputs the original signal. Output to the RF transmitter 22. When the received signal of the challenge signal is input, the control unit 20 generates an encrypted code obtained by encrypting the code of the challenge signal with the secret key and the encryption algorithm used in the common key cryptosystem, and the encrypted code is generated. The original signal of the response signal containing the code is generated. This encrypted code corresponds to the code collation information. When the request signal has a configuration in which the electronic key 2 side also includes an identification code for performing code verification, the control unit 20 performs code verification using this identification code, and this code verification is performed. What is satisfied may be a condition for generating the response signal.

<Schematic configuration of vehicle-side unit 3>
Next, an example of a schematic configuration of the vehicle-side unit 3 will be described with reference to FIG. As shown in FIG. 3, the vehicle-side unit 3 includes a BCM (Body Control Module) 30, an LF transmission antenna 31, an RF receiver 32, a communication module 33, a vehicle state sensor 34, a locking / unlocking switch (hereinafter, locking / unlocking SW) 35. , A start switch (hereinafter, start SW) 36, a door lock motor 37, a power unit ECU 38, and a buzzer 39.

  The LF transmission antenna 31 is a transmission antenna that transmits a request signal by an LF band radio wave. A plurality of LF transmission antennas 31 may be provided in the vehicle. For example, the LF transmission antenna 31 may be provided near the door of the driver's seat, the door of the passenger seat, the door of the trunk room, or the like. In the following, for simplification of description, description will be given assuming that there is one LF transmission antenna 31. The RF receiver 32 receives a response signal transmitted from the electronic key 2 side in a UHF band radio wave.

  The communication module 33 is a communication module for performing wireless communication with the mobile terminal 4. The wireless communication between the communication module 33 and the mobile terminal 4 may be wireless communication according to the short-range wireless communication standard. In the present embodiment, the description will be given assuming that the wireless communication is based on Bluetooth (registered trademark) Low Energy (hereinafter referred to as BLE).

  The vehicle state sensor 34 is a sensor group for detecting information about the behavior of the vehicle such as the traveling state and the operating state of the vehicle. Examples of the vehicle state sensor 34 include a vehicle speed sensor that detects a vehicle speed, a shift position sensor that detects a shift position, and a brake switch that detects a brake operation.

  The locking / unlocking SW 35 is a switch for requesting locking / unlocking of vehicle doors such as a driver's seat door, a passenger seat door, and a luggage compartment door. The locking / unlocking SW 35 may be provided on the outer door handle of the vehicle or on the rear bumper. As the locking / unlocking SW 35, for example, a touch switch or a mechanical button switch can be used. The start SW 36 is, for example, a switch provided in front of the driver's seat for requesting start of a traveling drive source of the vehicle. As the starting SW 36, for example, a mechanical button switch may be used.

  The door lock motor 37 is an actuator for locking and unlocking the vehicle, and locks or unlocks the door lock of the vehicle in response to a signal from the BCM 30. The door lock motor 37 receives the lock signal to operate to lock the door lock, and receives the unlock signal to operate to unlock the door lock.

  The power unit ECU 38 is an electronic control device that controls a traveling drive source such as an internal combustion engine or a motor generator of the vehicle. When the start permission signal of the traveling drive source is acquired from the BCM 30, the power unit ECU 38 operates the traveling drive source such as the internal combustion engine or the motor generator of the vehicle. To start.

  The buzzer 39 is a so-called answerback buzzer, and outputs an electronic sound in the audible range as an answerback sound for locking and unlocking the vehicle. The frequency band of the electronic sound output from the buzzer 39 may be in the range of 20 Hz to 20 kHz, and may be, for example, about 100 Hz to 10 kHz. The buzzer 39 is arranged outside the vehicle so that an electronic sound can be heard. In addition, it is preferable that the answerback sound output from the buzzer 39 has identification information for identifying each vehicle embedded therein. As an example, this identification information is a code for each vehicle, and is encoded by a series of pitches and tones so that it can be put on a sound wave.

The BCM 30 includes a processor, a memory, an I / O, and a bus connecting these, and executes various processes related to vehicle authentication by executing a control program stored in the memory. The memory mentioned here is a non-transitory tangible storage medium that non-temporarily stores computer-readable programs and data. The non-transitional physical storage medium is realized by a semiconductor memory or a magnetic disk. The BCM 30 corresponds to the vehicle side device.

<Schematic configuration of BCM 30>
Here, an example of a schematic configuration of the BCM 30 will be described with reference to FIG. As shown in FIG. 3, the BCM 30 includes a microcomputer 300 and an LF driver IC 320. The LF driver IC 320 is an IC that causes the LF transmission antenna 31 to transmit a signal. The LF driver IC 320 causes the LF transmission antenna 31 to transmit a request signal in accordance with a request from the microcomputer 300. The microcomputer 300 includes a vehicle state determination unit 301, a request unit 302, a response acquisition unit 303, a storage unit 304, a code collation unit 305, a lock / unlock permission unit 306, a mobile information acquisition unit 307, a fingerprint authentication unit 308, and a start permission unit 309. Is provided as a functional block.

  The vehicle state determination unit 301 determines the vehicle state based on the sensing result regarding the vehicle state detected by the vehicle state sensor 34. For example, it is determined whether or not the vehicle is parked based on the vehicle speed detected by the vehicle speed sensor, the shift position detected by the shift position sensor, and the like.

  The request unit 302 requests the LF driver IC 320 to transmit a request signal according to the signal input from the lock / unlock SW 35 and the vehicle state determined by the vehicle state determination unit 301. For example, when the vehicle state determination unit 301 determines that the own vehicle is parked, the request unit 302 periodically requests the LF driver IC 320 to transmit a request signal from the LF transmission antenna 31. Further, when the vehicle state determination unit 301 determines that the vehicle is parked and a signal indicating that the locking / unlocking SW 35 is operated is input, the request unit 302 receives the LF transmission antenna 31. The LF driver IC 320 may be requested to transmit a request signal from the device.

  The response acquisition unit 303 acquires, via the RF receiver 32, the response signal including the encryption code, which is transmitted from the electronic key 2 that has received the request signal transmitted from the LF transmission antenna 31. The response acquisition unit 303 corresponds to the code matching information acquisition unit. The storage unit 304 is, for example, an electrically rewritable non-volatile memory, and stores information for authentication. For example, as the information for authentication by code matching, for example, a secret key used in the common key cryptosystem is stored. Further, as the information for fingerprint authentication, the fingerprint information of the authorized user is stored.

  The code matching unit 305 obtains by encrypting the encryption code included in the response signal acquired by the response acquisition unit 303 and the code of the challenge signal transmitted from the LF transmission antenna 31 with the secret key stored in the storage unit 304. Authentication is performed by matching the code with the encrypted code that is used.

  The locking / unlocking permission unit 306 sends a signal to the door lock motor 37 to permit locking / unlocking of each vehicle door based on the fact that the code collation unit 305 has succeeded in the code collation. If the door is locked, an unlocking signal may be sent to the door lock motor 37. If the door is unlocked, a locking signal may be sent to the door lock motor 37. If the condition for transmitting the request signal from the LF transmitting antenna 31 does not include the operation of the locking / unlocking SW 35, a code indicating that the lock / unlocking SW 35 has been operated is displayed. The input may be a condition for permitting locking / unlocking of the vehicle door. The locking / unlocking permission unit 306 does not permit locking / unlocking of the vehicle door when the code collation unit 305 fails in code collation.

  Further, the locking / unlocking permission unit 306 sends an instruction to output an answerback sound to the buzzer 39 when sending a signal permitting locking / unlocking of each vehicle door to the door lock motor 37 to lock / unlock the vehicle door. .. This causes the buzzer 39 to output an answerback sound when the vehicle door is locked and unlocked.

  The mobile information acquisition unit 307 acquires the fingerprint information transmitted from the mobile terminal 4 via the communication module 33. The fingerprint authentication unit 308 performs fingerprint authentication by comparing the fingerprint information acquired by the mobile information acquisition unit 307 with the regular fingerprint information stored in the storage unit 304.

  When a signal indicating that the fingerprint authentication has been established by the fingerprint authentication unit 308 and the start SW 36 has been operated, the start permission unit 309 outputs to the power unit ECU 38 a start permission signal for the traveling drive source of the vehicle. send. The start permission unit 309 does not permit the start of the driving source of the vehicle when the fingerprint authentication by the fingerprint authentication unit 308 is unsuccessful.

<Schematic configuration of mobile terminal 4>
Next, an example of a schematic configuration of the mobile terminal 4 will be described with reference to FIG. The mobile terminal 4 is an information processing terminal separate from the electronic key 2 carried by the user. As the mobile terminal 4, for example, a multifunctional mobile phone such as a smartphone, a tablet terminal, or the like can be used. In the following, the case where the mobile terminal 4 is a multifunctional mobile phone will be described as an example for the following description. As shown in FIG. 4, the mobile terminal 4 includes a control unit 40, a fingerprint sensor 41, a storage unit 42, a microphone 43, and a communication module 44. In the present embodiment, for convenience, the description of the functions other than the functions related to fingerprint authentication in the vehicle authentication system 1 of the mobile terminal 4 is omitted.

  The fingerprint sensor 41 is a sensor that reads a human fingerprint, and may use any of an optical type, an electrostatic capacitance type, a pressure sensitive type, and an ultrasonic type. It is preferable that the fingerprint sensor 41 is commonly used for unlocking the screen lock of the mobile terminal 4. The screen lock is a function of restricting display and operation of a display in an information processing terminal such as a multi-function mobile phone and a tablet terminal, and can be restated as a screen lock.

  The storage unit 42 is, for example, an electrically rewritable nonvolatile memory, and stores fingerprint information of a regular user read by the fingerprint sensor 41. In the mobile terminal 4, in the process of registering the fingerprint information of the authorized user, the fingerprint sensor 41 may read the fingerprint information of the authorized user and store it in the storage unit 42. The fingerprint information of the authorized user is used for fingerprint authentication when the screen lock of the mobile terminal 4 is unlocked (hereinafter, fingerprint information for unlocking), and is transmitted from the mobile terminal 4 to the vehicle-side unit 3 (hereinafter , Transmission fingerprint information), and storage is preferably managed separately.

  The microphone 43 is a small microphone built in the mobile terminal 4, collects a voice uttered by the user and ambient sounds, converts the voice into an electrical voice signal, and outputs the electrical voice signal to the control unit 40. The microphone 43 is preferably the one used for the voice recognition function of the mobile terminal 4.

  The communication module 44 is a communication module for performing wireless communication with the communication module 33 of the vehicle side unit 3. The wireless communication between the communication module 33 and the communication module 44 may be wireless communication according to the short-range wireless communication standard as described above.

  The control unit 40 includes a processor, a memory, an I / O, and a bus connecting these, and executes various processes related to vehicle authentication by executing a control program stored in the memory. Executing the control program by the processor corresponds to executing the method corresponding to the control program. The memory mentioned here is a non-transitory tangible storage medium that non-temporarily stores computer-readable programs and data. The non-transitional physical storage medium is realized by a semiconductor memory or a magnetic disk. As shown in FIG. 4, the control unit 40 includes a fingerprint information acquisition unit 401, a storage processing unit 402, a sound recognition unit 403, and a transmission control unit 404 as functional blocks.

  The fingerprint information acquisition unit 401 acquires fingerprint information of the user's fingerprint read by the fingerprint sensor 41. The fingerprint information may be, for example, a finger pattern image or the like. The fingerprint of the user is read by the fingerprint sensor 41, for example, indoors before getting on the vehicle.

  The storage processing unit 402 writes the fingerprint information of the user acquired by the fingerprint information acquisition unit 401 in the storage unit 42 and stores it. The storage processing unit 402 also erases the fingerprint information stored in the storage unit 42. The storage processing unit 402 may be configured to separately manage the user's fingerprint information acquired by the fingerprint information acquisition unit 401 into release fingerprint information and transmission fingerprint information.

  The sound recognition unit 403 recognizes the answerback sound from the electrical signal of the answerback sound converted by the microphone 43 that collects the answerback sound output from the buzzer 39. The sound recognition unit 403 stores the waveform pattern of the electrical signal characteristic of the answerback sound of the vehicle in the storage unit 42 in advance, and compares the waveform patterns to recognize the answerback sound. Good. Further, when the sound recognition unit 403 adopts a configuration in which the identification information for each vehicle is embedded in the answerback sound, it is embedded in the answerback sound by decoding the identification information encoded in the answerback sound. The identification information only needs to be recognized.

  The transmission control unit 404 uses the recognition of the answerback sound by the sound recognition unit 403 as a trigger to read out the fingerprint information for transmission of the user stored in the storage unit 42, and the communication of the vehicle-side unit 3 from the communication module 44. Send to module 33. When the sound recognition unit 403 does not recognize the answerback sound, the transmission control unit 404 does not allow the transmission fingerprint information of the user stored in the storage unit 42 to be transmitted.

  Further, when the transmission control unit 404 adopts a configuration in which the identification information for each vehicle is embedded in the answerback sound, when the identification information recognized by the sound recognition unit 403 matches the identification information of the vehicle of the user, the sound recognition is performed. The recognition of the answerback sound by the unit 403 may be used as a trigger to cause the transmission fingerprint information of the user stored in the storage unit 42 to be transmitted. The identification information of the vehicle of the user to be compared with the identification information recognized by the sound recognition unit 403 may be stored in the storage unit 42 in advance. On the other hand, when the identification information recognized by the sound recognition unit 403 does not match the identification information of the vehicle of the user, the transmission fingerprint information of the user stored in the storage unit 42 may not be transmitted. According to this, the portable terminal 4 does not have to transmit the fingerprint information for transmission of the user in response to an answerback sound output by a vehicle other than the vehicle of the user.

  Then, when the transmission control unit 404 reads the transmission fingerprint information stored in the storage unit 42 and causes the transmission fingerprint information to be transmitted, the storage processing unit 402 deletes the transmission fingerprint information from the storage unit 42. On the other hand, the storage processing unit 402 may be configured not to delete the transmission fingerprint information stored in the storage unit 42 depending on the elapsed time after the transmission fingerprint information is stored in the storage unit 42. That is, the transmission fingerprint information stored in the storage unit 42 may be continuously stored in the storage unit 42 unless the transmission control unit 404 transmits the transmission fingerprint information. According to this, the user does not have to worry about the expiration date of the fingerprint information for transmission stored in the mobile terminal 4, so that the convenience is improved.

  The release fingerprint information stored in the storage unit 42 is deleted when the storage processing unit 402 receives an instruction to change or delete the release fingerprint information via the operation input unit of the mobile terminal 4. It may be configured.

<Authentication related processing in vehicle authentication system 1>
Next, an example of the flow of processing related to vehicle authentication in the vehicle authentication system 1 (hereinafter referred to as authentication related processing) will be described using the sequence diagram of FIG. In the sequence diagram of FIG. 5, the vehicle is parked and locked, the user is getting off the vehicle, and is approaching the vehicle for boarding, and the fingerprint of the user is stored in the storage unit 42 of the mobile terminal 4. An example will be described in which the information is already stored.

  First, a challenge signal is transmitted from the LF transmission antenna 31 of the vehicle unit 3, and the electronic key 2 receives this challenge signal (t1). The electronic key 2 that has received the challenge signal transmits a response signal including an encrypted code obtained by encrypting the code of the challenge signal, and the RF receiver 32 of the vehicle side unit 3 receives this response signal (t2).

  In the vehicle-side unit 3 that has received the response signal, the code collating unit 305 obtains the encrypted code included in the response signal and the code of the challenge signal transmitted from the LF transmission antenna 31 with the secret key. Authentication is performed by performing code collation with (t3). Then, when the encrypted codes match, the authentication by code collation is established (t4).

  When the authentication by the code verification is established, the locking / unlocking permission unit 306 permits the locking / unlocking of each vehicle door based on the authentication by the code verification being established (t5). Further, the locking / unlocking permission unit 306 causes the buzzer 39 to output an answerback sound when permitting locking / unlocking of each vehicle door (t6). Note that the locking / unlocking permission unit 306 may output an answerback sound before sending an unlocking signal to the door lock motor 37 when permitting locking / unlocking of each vehicle door, or unlocking the door lock motor 37. An answer back sound may be output after sending the lock signal, or an answer back sound may be output at the same time when the unlock signal is sent to the door lock motor 37.

  The portable terminal 4 collects the answerback sound output from the buzzer 39 with the microphone 43, and recognizes the answerback sound with the sound recognition unit 403 (t7). It is preferable that the application that performs the authentication-related process on the mobile terminal 4 is configured as a background application so that the user does not have to perform a trigger operation each time the vehicle gets into the vehicle. When the configuration in which the identification information for each vehicle is embedded in the answerback sound is adopted, the identification information embedded in the answerback sound may be recognized by the sound recognition unit 403.

  When the sound recognition unit 403 can recognize the answerback sound, the transmission control unit 404 reads out the transmission fingerprint information stored in the storage unit 42 (t8). In the case of adopting a configuration in which the identification information for each vehicle is embedded in the answer-back sound, it may be set as the reading condition that the identification information recognized by the sound recognition unit 403 matches the identification information of the vehicle of the user.

  Then, the transmission controller 404 causes the communication module 44 to transmit the read transmission fingerprint information, and the communication module 33 of the vehicle side unit 3 receives the transmission fingerprint information (t9). The storage processing unit 402 also deletes the transmission fingerprint information transmitted from the communication module 44 by the transmission control unit 404 from the storage unit 42 (t10).

  In the vehicle-side unit 3 that has received the fingerprint information for transmission, the fingerprint authentication unit 308 receives the fingerprint information for transmission, which is received by the communication module 33 and acquired by the mobile information acquisition unit 307, from the regular fingerprint information stored in the storage unit 304. Fingerprint authentication is performed by collating with the fingerprint information (t11). Then, when the fingerprint information matches, the fingerprint authentication is established (t12). When the fingerprint authentication is established, the start permitting unit 309 permits the start of the traveling drive source of the vehicle based on the establishment of the fingerprint authentication (t13).

<Summary of Embodiment 1>
According to the configuration of the first embodiment, the fingerprint information of the user is acquired by the mobile terminal 4 and stored in the storage unit 42, and the fingerprint information stored in the mobile terminal 4 is read out to the BCM 30 of the vehicle side unit 3. Will be sent. Therefore, it becomes possible to transmit the fingerprint information of the fingerprint read by the user indoors by the fingerprint sensor 41 to the BCM 30. According to this, it is not necessary to read the fingerprint with the fingerprint sensor provided in the vehicle, and it is possible to avoid the problem that the finger becomes wet and difficult to read even in rainy weather. The BCM 30 performs fingerprint authentication by collating the fingerprint information transmitted from the mobile terminal 4 with the regular fingerprint information, and switches whether or not to permit the start of the driving source of the vehicle depending on whether or not the fingerprint authentication is established. Therefore, according to the above configuration, it is possible to improve the convenience of permitting the start of the traveling drive source of the vehicle.

  In addition, since the portable terminal 4 causes the sound recognition unit 403 to recognize the answerback sound when the vehicle door is unlocked, the portable terminal 4 causes the fingerprint information stored in the storage unit 42 to be read and transmitted. The fingerprint information is not transmitted unless the vehicle is approached by a distance that can be recognized by the sound recognition unit 403. Therefore, it is possible to reduce the chances of stealing fingerprint information. Further, even when the third party uses the relay device to relay the answerback sound and illegally transmits the fingerprint information, the user can recognize the answerback sound. It becomes possible for the user to take measures against the theft of the vehicle by noticing that the operation has been performed. As a result, it becomes possible to improve the security while improving the convenience of permitting the starting of the traveling drive source of the vehicle.

  Further, according to the configuration of the first embodiment, the electronic key 2 used for code collation for permitting locking / unlocking of the vehicle door and the portable terminal 4 used for fingerprint authentication for permitting the start of the traveling drive source of the vehicle are different. It is the body. Therefore, the code verification and the fingerprint authentication are performed by different wireless communications. Therefore, the time and effort required for the relay attack increase, and the security can be further improved.

  In addition, since the fingerprint sensor 41 for reading the fingerprint on the mobile terminal 4 is also used for unlocking the screen lock of the mobile terminal 4, the fingerprint information of the fingerprint read when unlocking the screen of the mobile terminal 4 is used as a fingerprint. It can be used for authentication, and the convenience can be improved.

(Embodiment 2)
In the first embodiment, when the storage processing unit 402 causes the transmission control unit 404 to transmit the transmission fingerprint information stored in the storage unit 42 of the mobile terminal 4 once, the transmission fingerprint information is deleted from the storage unit 42. However, the present invention is not limited to this. For example, the storage processing unit 402 may have a configuration in which the transmission fingerprint information stored in the storage unit 42 is not deleted unless the transmission control unit 404 transmits the transmission fingerprint information multiple times (hereinafter, Embodiment 2).

  The configuration of the second embodiment will be described below. The vehicle authentication system 1 according to the second embodiment is the same as the vehicle authentication system 1 according to the first embodiment, except that the processing in the storage processing unit 402 of the mobile terminal 4 is partially different.

  The storage processing unit 402 of the second embodiment stores the storage of the first embodiment except that the transmission fingerprint information stored in the storage unit 42 is not deleted unless the transmission control unit 404 transmits the transmission fingerprint information multiple times. It is similar to the processing unit 402. The storage processing unit 402 of the second embodiment causes the transmission control unit 404 to count the transmission information after the transmission fingerprint information is stored in the storage unit 42 by the counter or the like. Then, when the counted cumulative number of times reaches a predetermined plurality of times (hereinafter referred to as a prescribed number), the transmission fingerprint information stored in the storage unit 42 is erased, while when the prescribed number of times is not reached, , Do not delete the fingerprint information for transmission.

  Here, an example of the flow of authentication-related processing in the mobile terminal 4 according to the second embodiment will be described with reference to the flowchart in FIG. The flowchart of FIG. 6 may be configured to start when the transmission fingerprint information is stored in the storage unit 42, for example.

  First, in step S21, when the sound recognition unit 403 recognizes an answerback sound (YES in S21), the process proceeds to step S22. On the other hand, if the sound recognition unit 403 does not recognize the answerback sound (NO in S21), the process returns to S21 and repeats the processing.

  In step S22, the transmission control unit 404 reads out the fingerprint information for transmission stored in the storage unit 42. In step S23, the transmission control unit 404 causes the communication module 44 to transmit the fingerprint information for transmission read in step S22. In step S24, the storage processing unit 402 adds 1 to the count of the number of transmissions of the fingerprint information for transmission (hereinafter, transmission count). The default value of the transmission count is 0, and the value is incremented by 1 every time the process of S24 is performed, and returns to 0 when the transmission fingerprint information is deleted from the storage unit 42. ..

  In step S25, if the transmission count has reached the specified number (YES in S25), the process proceeds to step S26. On the other hand, when the transmission count is less than the specified count (NO in S25), the process returns to S21 to repeat the process. The specified number of times referred to here may be a plurality of times and can be set arbitrarily. In step S26, the storage processing unit 402 erases the fingerprint information for transmission stored in the storage unit 42, and ends the authentication-related processing in the mobile terminal 4. At this time, the storage processing unit 402 resets the transmission count to 0, which is the default value.

  According to the configuration of the second embodiment, except that the storage processing unit 402 does not delete the transmission fingerprint information stored in the storage unit 42 unless the transmission control unit 404 transmits the transmission fingerprint information multiple times, Since it is the same as that of the first embodiment, it is possible to improve the security as well as the convenience of starting permission of the traveling drive source of the vehicle, as in the first embodiment.

  Furthermore, according to the configuration of the second embodiment, the transmission fingerprint information stored in the storage unit 42 is not deleted unless the transmission control unit 404 transmits the transmission fingerprint information a plurality of times. Once the user reads the fingerprint, it is not necessary to read the fingerprint every time the passenger gets on the vehicle. Therefore, convenience is further improved. Even when the transmission fingerprint information is continuously stored in the storage unit 42 until the transmission fingerprint information is transmitted from the mobile terminal 4 a plurality of times, that is, until the user gets on the board a plurality of times, Since the fingerprint information for transmission is transmitted with the trigger of recognizing the answerback sound at the time of unlocking, it is possible to maintain high security against relay attack.

(Embodiment 3)
In the first embodiment, when the storage processing unit 402 causes the transmission control unit 404 to transmit the transmission fingerprint information stored in the storage unit 42 of the mobile terminal 4 once, the transmission fingerprint information is deleted from the storage unit 42. However, the present invention is not limited to this. For example, the storage processing unit 402 may be configured not to delete the transmission fingerprint information stored in the storage unit 42 by causing the transmission control unit 404 to transmit the transmission fingerprint information (hereinafter, Embodiment 3).

  In the third embodiment, the storage processing unit 402 may be configured to delete it when the storage processing unit 402 receives an instruction to change or delete the transmission fingerprint information via the operation input unit of the mobile terminal 4. .. Further, in the third embodiment, the releasing fingerprint information may be shared as the transmitting fingerprint information.

  According to the configuration of the third embodiment, except that the storage processing unit 402 does not erase the transmission fingerprint information stored in the storage unit 42 by causing the transmission control unit 404 to transmit the transmission fingerprint information. Since it is the same as the first embodiment, it is possible to improve the security as well as the convenience of permitting the start of the traveling drive source of the vehicle, as in the first embodiment.

  Furthermore, according to the configuration of the third embodiment, the transmission fingerprint information stored in the storage unit 42 is not deleted no matter how many times the transmission fingerprint information is transmitted by the transmission control unit 404. You will not have to read. Therefore, the convenience is greatly improved. Even when the transmission fingerprint information is continuously stored in the storage unit 42, the transmission fingerprint information is transmitted when the answerback sound at the time of unlocking the vehicle door is recognized as a trigger. It is possible to maintain high sex.

(Embodiment 4)
In the above-described embodiment, the fingerprint information acquisition unit 401 of the mobile terminal 4 has been shown to acquire the fingerprint information of the user read by the fingerprint sensor 41 built in the mobile terminal 4, but the present invention is not limited to this. For example, the fingerprint information acquisition unit 401 may be configured to acquire the fingerprint information of the user, which is read by a fingerprint sensor provided indoors other than the mobile terminal 4.

  As an example, the fingerprint information acquisition unit 401 may acquire the fingerprint information of the user, which is read by the fingerprint sensor provided on the door knob inside the entrance door of the user's home, via wireless communication. This wireless communication may be performed by the communication module 44, or may be performed by using another communication module having a narrower communication range than the communication module 44. The fingerprint sensor may be installed in a place other than the doorknob inside the entrance door as long as it is indoors. However, from the viewpoint of security, it is preferable to provide it in the private space of the user.

  In addition, the fingerprint information acquisition unit 401 may be configured to acquire the fingerprint information of the user, which is read by a fingerprint sensor provided outside the mobile terminal 4 in a building outdoor portion under the rain shielding structure. Examples of the structure for rain protection include eaves and the like. Examples of the building outdoor portion under the rain shield structure include a door knob on the outside of the entrance door under the eaves.

  According to the configuration of the fourth embodiment, even if the mobile terminal 4 does not have a built-in fingerprint sensor, the mobile terminal 4 can acquire the fingerprint information of the user.

(Embodiment 5)
In the above-described embodiment, the electronic key 2 used for code matching for permitting locking / unlocking of the vehicle door and the mobile terminal 4 used for fingerprint authentication for permitting the start of the traveling drive source of the vehicle are separate components. Although shown, it is not necessarily limited to this. For example, the mobile terminal 4 may also have the function of the electronic key 2, and the mobile terminal 4 and the electronic key 2 may be integrated.

  It should be noted that the present disclosure is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims, and are obtained by appropriately combining the technical means disclosed in the different embodiments. Embodiments are also included in the technical scope of the present disclosure. Further, the control unit and the method thereof described in the present disclosure may be realized by a dedicated computer that configures a processor programmed to execute one or more functions embodied by a computer program. Alternatively, the apparatus and method described in the present disclosure may be realized by a dedicated hardware logic circuit. Alternatively, the apparatus and method described in the present disclosure may be realized by one or more dedicated computers configured by a combination of a processor that executes a computer program and one or more hardware logic circuits. Further, the computer program may be stored in a computer-readable non-transition tangible recording medium as an instruction executed by a computer.

1 vehicle authentication system, 2 electronic key, 3 vehicle side unit, 4 portable terminal, 20 control unit, 21 LF receiving unit, 22 RF transmitting unit, 30 BCM (vehicle side device), 31 LF transmitting antenna, 31 LF transmitting antenna, 32 RF receiver, 33 communication module, 34 vehicle state sensor, 35 locking / unlocking SW, 36 starting SW, 37 door lock motor, 38 power unit ECU, 39 buzzer, 40 control unit, 41 fingerprint sensor, 42 storage unit, 43 microphone, 44 Communication module, 300 microcomputer, 301 vehicle state determination unit, 302 request unit, 303 response acquisition unit (code collation information acquisition unit), 304 storage unit, 305 code collation unit, 306 locking / unlocking permission unit, 307 mobile information acquisition unit, 308 Fingerprint authentication unit, 309 start permission unit, 320 LF driver C, 401 fingerprint information acquisition unit, 402 storage unit, 403 a sound recognition unit, 404 transmission control unit

Claims (8)

A vehicle authentication system which is used in a vehicle that outputs an answerback sound when a door is unlocked and includes a mobile terminal (4) carried by a user and a vehicle side device (30) used in the vehicle,
The mobile terminal is
A fingerprint information acquisition unit (401) for acquiring the fingerprint information of the user,
A storage processing unit (402) for storing the fingerprint information acquired by the fingerprint information acquisition unit in a storage unit (42);
A sound recognition unit (403) for recognizing the answerback sound,
A transmission control unit (404) for reading the fingerprint information stored in the storage unit and transmitting the fingerprint information to the vehicle-side device,
The transmission control unit is triggered by recognition of the answerback sound by the sound recognition unit, reads the fingerprint information stored in the storage unit, and causes the fingerprint information to be transmitted.
The vehicle-side device,
A mobile information acquisition unit (307) for acquiring fingerprint information transmitted from the mobile terminal;
A fingerprint authentication unit (308) for performing fingerprint authentication by collating the fingerprint information acquired by the mobile information acquisition unit with regular fingerprint information;
When the fingerprint authentication unit establishes the fingerprint authentication, the vehicle driving drive source is permitted to start. On the other hand, when the fingerprint authentication unit does not succeed, the vehicle traveling drive source is permitted to start. A vehicle authentication system including a start permission unit (309).   The storage processing unit, based on the transmission control unit, to read and transmit the fingerprint information stored in the storage unit triggered by the recognition of the answerback sound in the sound recognition unit, based on, The fingerprint information stored in the storage unit is not erased depending on the elapsed time since the fingerprint information was stored in the storage unit while the fingerprint information was erased from the storage unit. Vehicle authentication system.   The storage processing unit has a predetermined cumulative number of times that the transmission control unit reads and transmits the fingerprint information stored in the storage unit, triggered by the sound recognition unit recognizing the answerback sound. The vehicle authentication system according to claim 1 or 2, wherein the fingerprint information stored in the storage unit is erased when it reaches a plurality of times. An electronic key (2) carried by the user, capable of exchanging information with the vehicle-side device via wireless communication;
The electronic key transmits code matching information for code matching to the vehicle side device,
The vehicle-side device,
A code collation information acquisition unit (303) for acquiring the code collation information transmitted from the mobile terminal,
A code collating unit (305) for performing the code collation using the code collating information acquired by the code collating information acquiring unit;
The code collating unit permits unlocking of the door of the vehicle when the code collating is established, while the code collating unit permits unlocking of the door of the vehicle when the code collating is not established. And an unlock permission unit (306)
The vehicle authentication system according to claim 1, wherein the electronic key and the mobile terminal are separate bodies.   5. The fingerprint information acquisition unit acquires fingerprint information of the user, which is read by a fingerprint sensor provided in an indoor or outdoor building under a rain shield structure other than the mobile terminal. The vehicle authentication system according to the item. In the answer back sound, identification information for identifying each vehicle is embedded,
The sound recognition unit, in addition to recognizing the answerback sound, also recognizes the identification information embedded in the answerback sound,
When the identification information recognized by the sound recognition unit matches the identification information of the vehicle of the user, the transmission control unit triggers that the answer recognition sound is recognized by the sound recognition unit, and While the fingerprint information stored in the storage unit is read out and transmitted, if the identification information recognized by the sound recognition unit does not match the identification information of the vehicle of the user, it is stored in the storage unit. The vehicle authentication system according to claim 1, wherein the fingerprint information that is present is not read and transmitted. A vehicle-side device (30) used in a vehicle that outputs an answerback sound when the door is unlocked and that switches whether to permit the start of the traveling drive source of the vehicle depending on whether fingerprint authentication is established. A mobile terminal (4) carried by a user, capable of exchanging information via wireless communication between
A fingerprint information acquisition unit (401) for acquiring the fingerprint information of the user,
A storage processing unit (402) for storing the fingerprint information acquired by the fingerprint information acquisition unit in a storage unit (42);
A sound recognition unit (403) for recognizing the answerback sound,
A transmission control unit (404) for reading the fingerprint information stored in the storage unit, collating the fingerprint information with regular fingerprint information, and transmitting the fingerprint information to the vehicle-side device that performs the fingerprint authentication;
The transmission control unit is a mobile terminal that causes the sound recognition unit to recognize the answerback sound as a trigger to read out and transmit the fingerprint information stored in the storage unit. A vehicle-side device (30) used in a vehicle that outputs an answerback sound when the door is unlocked and that switches whether to permit the start of the traveling drive source of the vehicle depending on whether fingerprint authentication is established. A portable terminal (4) computer carried by a user, capable of exchanging information via wireless communication between
A fingerprint information acquisition unit (401) for acquiring the fingerprint information of the user,
A storage processing unit (402) for storing the fingerprint information acquired by the fingerprint information acquisition unit in a storage unit (42);
A sound recognition unit (403) for recognizing the answerback sound,
When the answer recognition sound is recognized by the sound recognition unit, the fingerprint information stored in the storage unit is read, and the fingerprint information is collated with regular fingerprint information to perform the fingerprint authentication. A control program for causing the vehicle-side device to function as a transmission control unit (404).

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