JP2021046741A - Electronic key, control device, electronic key system, authentication method, and program - Google Patents

Abstract

To provide an electronic key, etc. that can appropriately prevent theft damage caused by relay attacks.SOLUTION: An electronic key 2, which is configured to communicate wirelessly with a control device 3 installed in a vehicle, includes: receiving means 202 for receiving face information of a person existing around the vehicle from the control device 3; authentication means 203 for performing face authentication by collating the resulting face information with face information stored in a memory in advance; and transmission means 204 for transmitting an unlocking permission signal for unlocking a door of the vehicle to the control device 3 if the face authentication is successful.SELECTED DRAWING: Figure 4

Description

The present invention relates to an electronic key or the like used for unlocking a vehicle door or the like.

In recent years, as a key for unlocking a vehicle door or the like, an electronic key using an electronic means for unlocking or the like is increasing. The electronic key performs wireless communication with the vehicle by weak radio waves and sends authentication information to the vehicle side, and when the authentication on the vehicle side is successful, the door unlocking permission and engine start permission are granted ( See Patent Documents 1 and 2).

For example, when a request signal is transmitted from the vehicle side to a narrow area of about 1 m around the vehicle and a user holding the electronic key approaches the vehicle, the electronic key receives the request signal and is held in the electronic key as a response. Send the authentication ID to the vehicle side. When the vehicle receives the authentication ID, it collates with the authentication ID held on the vehicle side to perform authentication, and when the authentication is successful, the door is set to the unlock permission state. Such a system is also called a smart entry system.

However, in such a system, there is a concern that the vehicle may be stolen by a relay attack, and countermeasures are required. The relay attack relays the wireless communication between the electronic key and the vehicle using a repeater, so that the authentication on the vehicle side is established even if the owner of the electronic key is away from the vehicle. It is a thing.

Japanese Unexamined Patent Publication No. 2018-003437 Japanese Unexamined Patent Publication No. 2011-052506

Since the communication between the electronic key and the vehicle may be cut off to prevent the relay attack, one method is to store the electronic key in a metal case. However, in this case, the owner of the electronic key has to take the trouble to take the electronic key out of the case and put it back in every time he / she gets in and out of the car, which impairs the convenience of the original electronic key.

In addition, even if the content of the authentication information and the transmission method thereof are improved to prevent the relay attack, the one based on the conventional smart entry system basically has a high affinity with the above-mentioned relay attack method. There is a risk of theft.

On the other hand, in Patent Document 1, unlike the conventional smart entry system, as an example of performing authentication on the electronic key side, the atmospheric pressure at the vehicle position is transmitted from the vehicle side to the electronic key, and the atmospheric pressure is measured by the electronic key. It is stated to compare with the barometric pressure at the key position. However, in this case, if the electronic key holder and the vehicle are located at the same altitude, there is a risk that the authentication will be successful even if the electronic key holder is away from the vehicle.

The present invention has been made in view of such a problem, and an object of the present invention is to provide an electronic key or the like that can suitably prevent theft damage due to a relay attack.

The first invention for solving the above-mentioned problems is an electronic key that performs wireless communication with a control device provided in a vehicle, and obtains face information of a person existing around the vehicle in the control device. The receiving means received from the vehicle, the authentication means for performing face recognition by collating the face information with the face information stored in the memory in advance, and unlocking the door of the vehicle when the face recognition is successful. It is an electronic key including a transmission means for transmitting an unlocking permission signal for the purpose to the control device.

The electronic key of the present invention performs face recognition by collating the face information received from the vehicle side with the face information stored in the electronic key in advance, and unlocks the door when the face recognition is successful. The unlocking permission signal is transmitted to the vehicle side. As described above, in the present invention, since the electronic key side authenticates using the information received from the vehicle side, the affinity with the relay attack method described above is basically low, and the risk of theft can be reduced. ..

For example, a relay that is expected to be used in a relay attack on a conventional smart entry system transmits an authentication ID or the like to the vehicle side as described above, and transmits relatively large data such as face information as an electronic key. It is not intended to be sent to the side. Therefore, even if a relay attack is attempted using such a repeater, the face information cannot be transmitted to the electronic key side in the present invention, and the door is not unlocked. Even if the face information can be transmitted to the electronic key side, the face information is for a thief or the like near the vehicle, the authentication by the electronic key is not successful, and the door is also unlocked. There is no such thing. Therefore, theft of the vehicle due to the relay attack can be suitably prevented.

The electronic key further includes requesting means for transmitting a request signal for face information to the control device when receiving a request signal from the control device, and the receiving means receives the face information as a response to the request signal. Is desirable.
As described above, the authentication process using the electronic key of the present invention can be incorporated as a modification of the process in the smart entry system described above.

After the unlocking permission signal is transmitted to the control device, the receiving means receives biometric information other than the face information of a person in the vehicle from the control device, and the authentication means stores the biometric information in advance in memory. Biometric authentication is performed by collating with the biometric information stored in the vehicle, and when the biometric authentication is successful, the transmission means transmits a start permission signal for starting the drive device of the vehicle to the control device. Is desirable.
As a result, after the door is unlocked, authentication by an electronic key is required even when starting a vehicle drive device such as an engine or a motor, which improves security and reliably prevents the vehicle from being stolen.

The biological information includes, for example, at least one of fingerprint information and vein information.
These biometric information can be naturally acquired by a biosensor provided on the steering wheel of the vehicle without any discomfort, and the authentication accuracy is sufficiently high.

A second invention is a control device provided in a vehicle that performs wireless communication with an electronic key, and is an acquisition means for acquiring face information of a person existing around the vehicle, the face information, and the face information. When the authentication with the electronic key is successful by collating with the face information stored in the memory of the electronic key, the unlocking permission signal for unlocking the door of the vehicle is received from the electronic key, and the unlocking permission signal is received. It is a control device including an unlocking permission means for setting a door in an unlocking permission state.
The second invention is a vehicle control device that wirelessly communicates with the electronic key of the first invention to enable unlocking of the vehicle door.

A third invention is an electronic key system having a control device provided in a vehicle and an electronic key for wireless communication between the control device, wherein the electronic key is a person existing around the vehicle. A receiving means for receiving the face information from the control device, an authentication means for performing face recognition by collating the face information with the face information stored in the memory in advance, and the vehicle when the face recognition is successful. It is an electronic key system including a transmission means for transmitting an unlocking permission signal for unlocking the door of the door to the control device.
The third invention is an electronic key system including the electronic key of the first invention.

A fourth invention comprises a step in which an electronic key that performs wireless communication with a control device provided in a vehicle receives face information of a person existing around the vehicle from the control device, and the face information. , The step of performing face recognition by collating with the face information stored in the memory in advance, and when the face recognition is successful, the unlocking permission signal for unlocking the door of the vehicle is transmitted to the control device. It is an authentication method characterized by performing steps and performing.
The fourth invention is an authentication method using the electronic key of the first invention.

A fifth invention is a receiving means for receiving an electronic key for wireless communication with a control device provided in a vehicle, face information of a person existing around the vehicle from the control device, and the face information. The control device provides an authentication means for performing face recognition by collating with face information stored in a memory in advance, and an unlocking permission signal for unlocking the vehicle door when face recognition is successful. It is a program characterized by functioning as a transmission means for transmitting to.
The fifth invention is a program for operating the electronic key of the first invention.

A sixth aspect of the present invention provides a control device provided in a vehicle for wireless communication with an electronic key, an acquisition means for acquiring face information of a person existing around the vehicle, the face information, and the electronic key. When the authentication with the electronic key is successful by collating with the face information stored in the memory of the above, the unlocking permission signal for unlocking the door of the vehicle is received from the electronic key, and the door is opened. It is a program for functioning as an unlocking permission means for setting the unlocking permission state.
The sixth invention is a program for operating the control device of the second invention.

INDUSTRIAL APPLICABILITY According to the present invention, it is possible to provide an electronic key or the like that can suitably prevent theft damage due to a relay attack.

The figure which shows the structure of the electronic key system 1. The figure which shows the hardware composition of the electronic key 2. An example in which the biosensor 44 is provided on the handle 45. The figure which shows the functional structure of the electronic key system 1. A flowchart showing the flow of the authentication method at the time of boarding. A flowchart showing the flow of the authentication method at the time of starting the engine.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

(1. Electronic key system 1)
FIG. 1 is a diagram showing a configuration of an electronic key system 1 according to an embodiment of the present invention. The electronic key system 1 is for preventing the vehicle 4 from being stolen by a relay attack, and includes an electronic key 2, a control device 3, and the like.

The electronic key 2 is a terminal owned by a user (owner of the vehicle 4), and is also called a portable device, a smart key, or the like. The electronic key 2 performs wireless communication with the control device 3 provided in the vehicle 4.

FIG. 2 is a diagram showing a hardware configuration of the electronic key 2. As shown in FIG. 2, the electronic key 2 includes a control unit 21, a memory 22, a communication unit 23, and the like.

The control unit 21 is a computer equipped with a CPU, ROM, RAM, and the like. The CPU calls a program stored in a storage medium such as a memory 22 or a ROM into a work memory area on the RAM and executes the program.

The memory 22 is a storage device such as a flash memory, and stores a program executed by the control unit 21, data necessary for program execution, and the like.

In particular, in the present embodiment, the user's face information 221 and the biometric information 222 are stored in the memory 22 by the pre-registration process.

The face information 221 is information about the user's face, and in the present embodiment, the user's face image is used.
The biometric information 222 is the biometric information of the user other than the face information 221. In this embodiment, the fingerprint image and the vein image of the user are used.

When registering the face information 221 and the biometric information 222, for example, the face image, fingerprint image, and vein image input to the personal computer or smartphone may be recorded in the memory 22 of the electronic key 2 using a writing device such as a reader / writer. .. However, the registration method is not limited to this.

The communication unit 23 wirelessly communicates with the control device 3 of the vehicle 4 and exchanges various signals and data with the control device 3.

Returning to the description of FIG. The control device 3 controls the vehicle 4, particularly permits the unlocking of the door and the start of the engine, and includes a security ECU (Electronic Control Unit) 31, a transmitting unit 32, a receiving unit 33, and the like.

The security ECU 31 is a control unit that performs various processes related to door unlocking permission and engine start permission, and can be realized by a computer equipped with a CPU, ROM, RAM, and the like. The security ECU 31 executes a program stored in a storage medium such as a ROM to execute a process related to permission to unlock the door and permission to start the engine. These processes will be described later.

The transmission unit 32 wirelessly communicates with the electronic key 2 and transmits various signals and data to the electronic key 2. The transmission unit 32 transmits via the antenna outside the vehicle or the antenna inside the vehicle. The outside antenna is provided on the outer door handle of the vehicle 4, and the inside antenna is provided inside the vehicle 4.

The receiving unit 33 wirelessly communicates with the electronic key 2 and receives various signals and data from the electronic key 2. The receiving unit 33 receives the signal via an antenna provided on the vehicle body.

The vehicle 4 is also provided with a drive recorder 41, a door lock 42, a control unit 43, a biosensor 44, and the like, and these are connected to the security ECU 31 in a communicable manner.

The drive recorder 41 captures an image of the surroundings of the vehicle 4 as a moving image by the camera 411 and records the image. The camera 411 is a video camera that uses an image sensor such as a CCD (Charge Coupled Device) image sensor or a CMOS (Complementary Metal Oxide Semiconductor) image sensor, and can capture an image in a range of 360 ° around the entire circumference of the vehicle 4.

The door lock 42 includes a door lock mechanism for the vehicle 4, a door lock ECU, and the like. The door lock ECU can switch the door lock mechanism from the locked state to the unlocked state. The user can unlock the door by operating the outer door handle (not shown) of the vehicle 4, for example, when the door is in the unlocking permitted state. On the other hand, when the door is locked, the door cannot be unlocked by operating the outer door handle.

The control unit 43 controls various types of driving devices of the vehicle 4, such as an engine and a motor. In the following description, it is assumed that the control unit 43 controls the engine, and the control unit 43 switches the engine from the locked state to the start permission state. The user can start the engine by pressing the engine start button (not shown), for example, when the engine is in the start permission state. On the other hand, when the engine is locked, the engine cannot be started even if the engine start button is pressed. The motor may be controlled by the control unit 43. In that case, the engine may be read as a motor in the following description.

The biosensor 44 is a sensor that acquires biometric information of the user. The biosensor 44 of the present embodiment is an image sensor, which is provided on the handle 45 of the vehicle 4 as shown in FIG. 3, and biometric information is obtained from a fingerprint image (fingerprint information) and a vein image (vein information) of a user holding the handle 45. Get as. However, the location where the biosensor 44 is installed is not limited to this.

(2. Functions of electronic key system 1)
FIG. 4 is a diagram showing a functional configuration of the electronic key system 1. As shown in FIG. 4, in the electronic key system 1, the electronic key 2 has a requesting means 201, a receiving means 202, an authentication means 203, a transmitting means 204, and the like, and the control device 3 has a requesting means 301, an acquiring means 302, and a solution. It has a lock permission means 303, a start permission means 304, and the like.

In the request means 201, the control unit 21 of the electronic key 2 transmits a request signal for face information and biometric information to the control device 3 of the vehicle 4 via the communication unit 23.

In the receiving means 202, the control unit 21 of the electronic key 2 responds to the request signal by other than the face information of the person existing around the vehicle 4 from the control device 3 of the vehicle 4 and the face information of the person in the vehicle 4. The biometric information is received via the communication unit 23.

The authentication means 203 authenticates by the control unit 21 of the electronic key 2 collating the face information and the biometric information received from the control device 3 of the vehicle 4 with the face information 221 and the biometric information 222 stored in the memory in advance. It is something to do.

When the above authentication is successful, the transmission means 204 allows the control unit 21 of the electronic key 2 to perform an unlock permission signal for unlocking the door of the vehicle 4 and a start permission for starting the engine of the vehicle 4. The signal is transmitted to the control device 3 of the vehicle 4 via the communication unit 23.

In the request means 301, the security ECU 31 of the control device 3 transmits a request signal via the transmission unit 32. When the electronic key 2 receives the request signal, the electronic key 2 transmits the above-mentioned request signal to the control device 3 as a response.

In the acquisition means 302, the security ECU 31 of the control device 3 acquires the face information of a person existing around the vehicle 4 and the biometric information of the person in the vehicle 4. The face information (face image) can be extracted by performing image processing on the photographed image taken around the vehicle 4 by the camera 411 of the drive recorder 41, and the biometric information (fingerprint image and vein image) is obtained by the biosensor 44. be able to.

When the security ECU 31 of the control device 3 receives the unlocking permission signal from the electronic key 2 via the receiving unit 33, the unlocking permission means 303 transmits a control signal to the door lock 42 to open the door of the vehicle 4. The unlocking is permitted.

When the security ECU 31 of the control device 3 receives the start permission signal from the electronic key 2 via the receiving unit 33, the start permission means 304 transmits a control signal to the control unit 43 and permits the engine of the vehicle 4 to start. It is a state.

(3. Authentication method in electronic key system 1)
Next, the authentication method in the electronic key system 1 will be described. In the present embodiment, authentication is performed by the electronic key system 1 both at the time of boarding and at the time of starting the engine, and therefore each procedure will be described below.

(3-1. Authentication at the time of boarding)
FIG. 5 is a flowchart showing the flow of the authentication method at the time of boarding. S102 to S103 and S107 to S110 of FIG. 5 are processes in which the control unit 21 of the electronic key 2 controls and executes each part of the electronic key 2, and other processes are performed by the security ECU 31 of the control device 3 in each part of the control device 3. Control and execute. Here, it is assumed that the vehicle 4 is stopped with the door locked and the engine stopped.

In the present embodiment, the control device 3 of the vehicle 4 transmits a request signal from the antenna outside the vehicle to a narrow area of about 1 m around the vehicle 4 (S101). When the user approaches the vehicle 4 while possessing the electronic key 2, the electronic key 2 entering the narrow region receives the request signal (S102) and transmits a face information request signal to the control device 3 as a response. (S103).

The control device 3 transmits a request signal on condition that the user touches a touch sensor (not shown) of the outer door handle when the user operates the outer door handle of the vehicle 4 to open the door. You may try to do it. Also in this case, the user's electronic key 2 receives the request signal and transmits the face information request signal to the control device 3.

When the control device 3 receives the face information request signal (S104), the control device 3 transmits the control signal to the drive recorder 41 to photograph the surroundings of the vehicle 4 by the camera 411, and extracts the face image of the person from the photographed image. Then, it is acquired as face information (S105). A known image processing method can be applied to the extraction of the face image.

If the camera 411 of the drive recorder 41 continues to shoot the surroundings even when the engine of the vehicle 4 is stopped, the face image may be extracted from the shot image taken by the camera 411 when the face information request signal is received. ..

The control device 3 transmits the face information (face image) acquired in S105 to the electronic key 2 (S106). When the electronic key 2 receives the face information (S107), the electronic key 2 executes face authentication using the face information (S108).

In S108, the electronic key 2 collates the face image received as face information in S107 with the face image of the user stored in the memory 22 as face information 221 in advance, and both face images are of the same person. Judge whether or not. When both face images are of the same person, the authentication is successful (S109; Yes), and the electronic key 2 transmits an unlock permission signal for unlocking the door of the vehicle 4 to the control device 3 (S110). ).

When the captured image of the camera 411 includes the face images of a plurality of people, for example, these plurality of face images are transmitted to the electronic key 2, and one of the face images is stored in the memory 22 as face information 221. If it is determined that the person is the same as the face image of the user, the authentication can be successful.

When the control device 3 receives the unlock permission signal (S111), the control device 3 transmits the control signal to the door lock 42 to put the door of the vehicle 4 in the unlock permission state (S112). As a result, the user can unlock the door by operating the outer door handle or the like and get on the vehicle 4.

On the other hand, in the face authentication (S108), if it is not determined that the face image received in S107 and the face image of the user stored in the memory 22 belong to the same person, the authentication fails (S109; Nо). , End the process. In this case, the door remains locked and cannot be unlocked.

(3-2. Certification when starting the engine)
FIG. 6 is a flowchart showing the flow of the authentication method at the time of starting the engine. S202 to S203 and S207 to S210 of FIG. 6 are processes in which the control unit 21 of the electronic key 2 controls and executes each part of the electronic key 2, and other processes are performed by the security ECU 31 of the control device 3 in each part of the control device 3. Control and execute.

The authentication method at the time of starting the engine is almost the same as the authentication method at the time of boarding except that the authentication is performed using the fingerprint image and the vein image.

That is, in the present embodiment, the control device 3 of the vehicle 4 transmits the request signal from the in-vehicle antenna to the narrow space in the vehicle 4 (S201). When the user unlocks the door of the vehicle 4 in the above procedure, possesses the electronic key 2 and gets into the vehicle 4, the electronic key 2 receives the request signal (S202), and in response, the biometric information request signal. Is transmitted to the control device 3 (S203).

The control device 3 receives the biometric information request signal (S204), and then acquires the fingerprint image and the vein image as biometric information by the biosensor 44 (S205), and obtains the acquired biometric information (fingerprint image and vein image). It is transmitted to the electronic key 2 (S206). As described above, the biosensor 44 is provided on the steering wheel 45, and in the present embodiment, when the user who gets into the vehicle 4 holds the steering wheel 45, the biosensor 44 acquires a fingerprint image and a vein image.

When the electronic key 2 receives the biometric information (S207), the electronic key 2 executes biometric authentication using the electronic key 2 (S208).

In S208, for example, the electronic key 2 collates the fingerprint image received as biometric information in S207 with the fingerprint image of the user stored in the memory 22 as biometric information 222 in advance, and both fingerprint images are of the same person. It is determined that there is, and both vein images are of the same person by collating the vein image also received as biometric information in S207 with the user's vein image recorded as biometric information 222 in the memory 22. If so, the authentication is successful, and if not, the authentication is unsuccessful.

If the authentication is successful (S209; Yes), the electronic key 2 transmits a start permission signal for starting the engine to the control device 3 (S210). When the control device 3 receives the start permission signal (S211), the control device 3 transmits the control signal to the control unit 43 to put the engine in the start permission state (S212). As a result, the engine of the vehicle 4 can be started, and the user can start the engine by, for example, operating the engine start button.

If the authentication fails (S209; Nо), the engine start permission is not given and the process ends as it is. In this case, the engine cannot be started even if the engine start button is operated.

As described above, the electronic key 2 of the present embodiment performs face recognition by collating the face information received from the vehicle 4 side with the face information 221 stored in the electronic key 2 in advance, and the face recognition is successful. In that case, an unlocking permission signal for unlocking the door is transmitted to the vehicle 4 side. As described above, in the present embodiment, since the electronic key 2 authenticates using the information received from the vehicle 4 side, the affinity with the relay attack method described above is basically low, and the risk of theft is reduced. Can be done.

For example, a relay that is expected to be used in a relay attack on a conventional smart entry system transmits an authentication ID or the like to the vehicle 4 side as described above, and electronically transmits relatively large data such as face information. It is not sent to the key 2 side. Therefore, even if a relay attack is attempted using such a repeater, the face information cannot be transmitted to the electronic key 2 side in the present embodiment, and the door is not unlocked. Further, even if the face information can be transmitted to the electronic key 2 side, the face information is for a thief or the like near the vehicle 4, and the authentication by the electronic key 2 is not successful, and the door is also opened. It will not be locked. Therefore, theft of the vehicle due to the relay attack can be suitably prevented.

Further, the authentication process using the electronic key 2 of the present embodiment can be incorporated as a modification of the process in the smart entry system described above. That is, when the electronic key 2 receives the request signal from the control device 3 of the vehicle 4, the electronic key 2 transmits the request signal of face information and biometric information to the control device 3. As a response, the electronic key 2 receives face information and biological information from the control device 3 and authenticates the electronic key 2.

Further, in the present embodiment, after the door is unlocked, authentication is also required when starting a drive device such as an engine or a motor, and security is improved by using both authentication at the time of boarding and authentication at the time of starting the engine. Theft of the vehicle 4 can be reliably prevented. By using the fingerprint image and the vein image as the biometric information used at this time, the biometric information 44 provided on the steering wheel 45 or the like of the vehicle 4 can naturally acquire the biometric information without any discomfort, and the authentication accuracy is sufficiently high.

However, the present invention is not limited to the above embodiments. For example, in the above embodiment, the request signal is transmitted from the vehicle 4 side at the time of authentication at the time of boarding, but instead, the face information request signal may be transmitted from the electronic key 2 to the narrow area around the vehicle. Good. After the control device 3 of the vehicle 4 receives the face information request signal, the processing after S105 in FIG. 5 can be performed in the same manner. This also applies to the certification at the time of starting the engine.

Further, in the present embodiment, a face image is used as the face information and a fingerprint image or a vein image is used as the biometric information at the time of authentication, but the feature amount calculated from these images is used as the face information or the biometric information. Is also possible. In this case, the security ECU 31 of the control device 3 calculates the feature amounts of the face image, the fingerprint image, and the vein image acquired by the camera 411 and the biosensor 44, and transmits the feature amounts to the electronic key 2.

As biological information, information on fingerprints such as fingerprint images and their feature amounts (fingerprint information) and information on veins such as vein images and their feature amounts (vein information) are used, but only one of them is used. You may. However, the authentication accuracy is further improved by using both.

Further, the biological information used for authentication is not limited to fingerprint information and vein information, and may be any information obtained from the living body. As the biological sensor 44, one corresponding to the acquired biological information can be used. For example, it is possible to use iris information such as an iris image and its feature amount as biological information, and a camera or the like arranged at an appropriate position can be used for the acquisition.

Further, as authentication at the time of boarding, the control device 3 of the vehicle 4 transmits the identification information of the vehicle 4 such as the vehicle ID together with the face information to the electronic key 2, and the electronic key 2 adds the identification information to the electronic key in addition to the face authentication. The process of collating with the identification information of the vehicle 4 stored in advance in the memory 22 of 2 may be performed. The electronic key 2 sends an unlocking permission signal to the control device of the vehicle 4 when the face recognition is successful and the identification information of the vehicle 4 received from the control device 3 matches the identification information of the vehicle 4 stored in the memory 22. Send to 3. As a result, it is possible to reliably prevent the authentication from being established with the vehicle 4 owned by another person. The above is an example at the time of boarding, but the same processing can be performed at the time of starting the engine.

Further, in the present embodiment, the owner of the vehicle 4 is registered in the electronic key 2 as the face information 221 and the biometric information 222, but the owner such as the owner of the vehicle 4 as well as the owner of the vehicle 4 permits it. It is also possible to register face information 221 and biometric information 222 of a plurality of people including a person. In this case, the electronic key 2 is authenticated if it is determined that the face information received from the vehicle 4 side is the same person for any of the face information 221 of a plurality of people, for example, as authentication at the time of boarding. This also applies to the certification at the time of starting the engine.

Further, when the authentication by the electronic key 2 fails (S109; No in FIG. 5; S209; No in FIG. 6), the electronic key 2 may issue an alarm such as an alarm. This makes it possible to notify the user of the existence of a thief or the like. The alarm may be not only by an auditory means such as an alarm, but also by a visual means such as lighting a lamp.

Although preferred embodiments of the electronic key system and the like according to the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to such examples. It is clear that a person skilled in the art can come up with various modifications or modifications within the scope of the technical idea disclosed in the present application, and these also naturally belong to the technical scope of the present invention. Understood.

1: Electronic key system 2: Electronic key 3: Control device 4: Vehicle 21: Control unit 22: Memory 23: Communication unit 31: Security ECU
32: Transmitter 33: Receiver 41: Drive recorder 42: Door lock 43: Control unit 44: Biosensor 201: Requesting means 202: Receiving means 203: Authentication means 204: Transmitting means 221: Face information 222: Biometric information 301: Request means 302: Acquisition means 303: Unlocking permission means 304: Start permission means 411: Camera

Claims (9)

An electronic key that performs wireless communication with a control device installed in the vehicle.
A receiving means for receiving face information of a person existing around the vehicle from the control device, and
An authentication means that performs face recognition by collating the face information with face information stored in a memory in advance.
When the face recognition is successful, a transmission means for transmitting an unlock permission signal for unlocking the door of the vehicle to the control device, and a transmission means.
An electronic key characterized by being equipped with. Upon receiving the request signal from the control device, the control device is further provided with a request means for transmitting the request signal for face information.
The electronic key according to claim 1, wherein the receiving means receives the face information as a response to the request signal. After the unlocking permission signal is transmitted to the control device, the receiving means receives biological information other than the face information of a person in the vehicle from the control device.
The authentication means performs biometric authentication by collating the biometric information with the biometric information stored in the memory in advance.
The electronic key according to claim 1 or 2, wherein the transmission means transmits a start permission signal for starting the drive device of the vehicle to the control device when the biometric authentication is successful. .. The electronic key according to claim 3, wherein the biological information includes at least one of fingerprint information and vein information. A control device installed in a vehicle that performs wireless communication with an electronic key.
An acquisition means for acquiring face information of a person existing around the vehicle, and
An unlocking permission signal for unlocking the vehicle door from the electronic key when the authentication with the electronic key is successful by collating the face information with the face information stored in the memory of the electronic key. And the unlocking permission means that puts the door in the unlocking permission state.
A control device comprising. An electronic key system having an electronic key for wireless communication between a control device provided in a vehicle and the control device.
The electronic key is
A receiving means for receiving face information of a person existing around the vehicle from the control device, and
An authentication means that performs face recognition by collating the face information with face information stored in a memory in advance.
When the face recognition is successful, a transmission means for transmitting an unlock permission signal for unlocking the door of the vehicle to the control device, and a transmission means.
An electronic key system characterized by being equipped with. An electronic key that performs wireless communication with a control device installed in the vehicle
A step of receiving face information of a person existing around the vehicle from the control device, and
A step of performing face recognition by collating the face information with the face information stored in the memory in advance, and
When the face recognition is successful, a step of transmitting an unlocking permission signal for unlocking the door of the vehicle to the control device, and a step of transmitting the unlocking permission signal to the control device.
An authentication method characterized by performing. An electronic key that performs wireless communication with a control device installed in the vehicle
A receiving means for receiving face information of a person existing around the vehicle from the control device, and
An authentication means that performs face recognition by collating the face information with face information stored in a memory in advance.
When the face recognition is successful, a transmission means for transmitting an unlock permission signal for unlocking the door of the vehicle to the control device, and a transmission means.
A program characterized by functioning as. A control device installed in the vehicle that performs wireless communication with the electronic key,
An acquisition means for acquiring face information of a person existing around the vehicle, and
An unlocking permission signal for unlocking the vehicle door from the electronic key when the authentication with the electronic key is successful by collating the face information with the face information stored in the memory of the electronic key. And the unlocking permission means that puts the door in the unlocking permission state.
A program to function as.

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