JP7183834B2 - portable machine - Google Patents

Description

The present invention relates to a portable device that is carried by a vehicle user and communicates with a wireless communication device mounted on the vehicle.

In order to eliminate the troublesomeness of taking out the key and unlocking the door every time one gets into the vehicle, a technology called passive entry has been developed and is now widely used. In this technology called passive entry, a wireless communication device installed in the vehicle and a portable device such as an electronic key carried by the vehicle user communicate wirelessly to determine whether or not the device is a legitimate portable device. Authenticate.

However, radio waves may be relayed between the vehicle and a portable device located far from the vehicle, and authentication may be performed by an unauthorized method. As a result, there is a risk that the vehicle door lock will be unlocked by a third party who does not carry the official portable device.

Therefore, by installing a device that authenticates using physical information such as fingerprints in the vehicle and performing authentication using personal information (hereinafter referred to as physical authentication) in addition to authenticating the portable device, theft of the vehicle can be prevented. Techniques have been proposed to try to prevent this. In addition, it has been proposed to equip a portable device with a function of physical authentication (Patent Document 1).

JP 2017-115439 A

However, if physical authentication is required each time a portable device is authenticated, as in the above proposed technology, the user will be forced to perform physical authentication instead of key operation, which is convenient. There was a problem of losing sexuality.

The present disclosure has been made to solve the above-described problems in the conventional technology, and is a portable device capable of achieving high crime prevention performance by using physical authentication while suppressing deterioration in convenience. for the purpose of providing

The above objects are achieved by the combination of features stated in the independent claims, and the sub-claims define further advantageous embodiments. The symbols in parentheses described in the claims indicate the corresponding relationship with specific means described in the embodiments described later as one aspect, and do not limit the disclosed technical scope.

One disclosure relating to a portable device that solves the above problems is:
A portable device (100) carried by a user of a vehicle (1) and communicating with a wireless communication device (10) mounted on the vehicle,
a physical information acquisition unit (111) for acquiring physical information including physical characteristics of the user;
a physical information authentication unit (112) that performs authentication based on authentication data determined from physical information read from the user and authorized data determined from the physical information of the authorized user;
a storage unit (106) for storing a physical authentication result indicating that the authentication is successful when the physical information authenticating unit succeeds in authentication;
a timing unit (113) for measuring elapsed time after successful authentication by the physical information authentication unit;
a receiving unit (103) for receiving a transmission request for a physical authentication result from a wireless communication device;
an elapsed time determination unit (116) that determines whether or not the elapsed time when the transmission request is received is within the transmittable time;
a transmission unit (102) for transmitting the physical authentication result stored in the storage unit when the elapsed time determination unit determines that it is within the transmittable time;
a transmittable time changing unit (114) for changing the transmittable time;
a map indicating where to increase or decrease the set value of the transmittable time;
a position acquisition unit that acquires the position of the portable device ,
The transmittable time change unit uses the map to change the set value of the transmittable time to a value according to the position where the portable device is present.

This portable device transmits the physical authentication result if the elapsed time when receiving the transmission request is within the transmittable time, but does not transmit the physical authentication result if the elapsed time exceeds the transmittable time. As a result, when the user does not plan to use the portable device, even if the portable device receives a transmission request transmitted from the vehicle by an unauthorized person, it is possible to prevent the physical authentication result from being transmitted. be. Therefore, high crime prevention performance can be realized.

On the other hand, if a legitimate user using a portable device authenticates his or her physical information in advance when the time allowed for transmission does not elapse when using a portable device, the result of physical authentication will be displayed when a response request is received. sent. Therefore, deterioration of convenience is also suppressed.

In addition, although the portable device disclosed above transmits the result of physical authentication, it is also possible to transmit authentication data determined from physical information instead of the result of physical authentication, as disclosed in the following two portable devices.

Further, still another disclosure related to a portable device that solves the above-mentioned problems is:
A portable device (100) carried by a user of a vehicle (1) and communicating with a wireless communication device (10) mounted on the vehicle,
a physical information acquisition unit (111) for acquiring physical information including physical characteristics of the user;
a storage unit (106) for storing authentication data determined from physical information read from the user;
a timer (113) that measures the elapsed time after reading the physical information;
a receiving unit (103) for receiving a transmission request for authentication data from a wireless communication device;
an elapsed time determination unit (116) that determines whether or not the elapsed time when the transmission request is received is within the transmittable time;
a transmission unit (102) for transmitting authentication data stored in a storage unit when the elapsed time determination unit determines that it is within the transmittable time;
a transmittable time changing unit (114) for changing the transmittable time ;
a map showing where to increase or decrease the transmittable time;
a position acquisition unit that acquires the position of the portable device,
The transmittable time changing unit uses the map to change the transmittable time to a value corresponding to the position of the portable device .

The portable device according to another disclosure above does not transmit data if the elapsed time exceeds the transmittable time, which is the same as the portable device disclosed in the first disclosure. Therefore, like the portable device according to the first disclosure, it is possible to suppress deterioration in convenience while achieving high security performance.

It is a figure explaining the operation|movement outline|summary of a passive entry system. 2 is a diagram showing an internal configuration of portable device 100. FIG. 2 is a diagram showing an internal configuration of an authentication device 20; FIG. FIG. 3 is a flow chart showing the flow of processing executed by a physical information authentication unit 112 of FIG. 2; FIG. It is a flowchart which shows the flow of a process which transmits a response signal. It is a figure explaining that the theft of the vehicle 1 can be prevented. It is a figure which shows the internal structure of the portable device 200 of 2nd Embodiment. It is a figure which shows the internal structure of the authentication apparatus 1020 of 2nd Embodiment.

<First embodiment>
[System Overview]
Hereinafter, embodiments will be described based on the drawings. FIG. 1 illustrates how the user of the vehicle 1 carries the portable device 100 and approaches the vehicle 1 to achieve passive entry. It should be noted that the portable device 100 will be described as a dedicated electronic key provided in the passive entry system. However, unlike this, a multifunctional mobile terminal such as a smart phone can also be used as the mobile device 100 .

The portable device 100 includes a physical information reader 100d that reads physical information such as a fingerprint. be read. In FIG. 1(a), when the user of the vehicle 1 leaves home, the portable device 100 is made to read physical information. After having the portable device 100 read the physical information, the portable device 100 may be put in, for example, a pocket or a bag.

The physical information to be read by the portable device 100 is not limited to fingerprints, and can be various information as long as the information can identify the user of the vehicle 1 . For example, the physical information can be the shape of the face or the shape of the iris of the pupil. Furthermore, not only the shape but also the voiceprint may be acquired as physical information. As the physical information reader 100d mounted on the portable device 100, a device corresponding to the content to be read as physical information is adopted.

The portable device 100 stores regular data in advance. The authorized data is data determined from the bodily information of the authorized user, for example, data indicating the feature amount of the bodily information. When the physical information is read, physical authentication for confirming whether the read physical information is the physical information of an authorized user is performed using the authorized data. Then, when the authentication is successful, the body authentication result indicating the authentication success is stored.

As shown in FIG. 1B, the vehicle 1 is equipped with an authentication device 20 that authenticates the wireless communication device 10 and the portable device 100 . The wireless communication device 10 is connected to an in-vehicle antenna 10a that transmits radio waves in the LF band (hereinafter referred to as LF waves) and receives radio waves in the RF band (hereinafter referred to as RF waves). In the drawings and the specification, for the sake of simplification of illustration and description, it is assumed that one vehicle-mounted antenna 10a performs transmission of LF waves and reception of RF waves. However, transmission by LF waves and reception by RF waves can be shared by dedicated antennas.

The authentication device 20 periodically transmits a response request signal requesting a response from the portable device 100 to the surroundings from the vehicle-mounted antenna 10a via the wireless communication device 10 . The portable device 100 is also equipped with an antenna 100a that receives LF waves and transmits RF waves. Therefore, as shown in FIG. 1B, when the user of the vehicle 1 carries the portable device 100 and approaches the vehicle 1, the portable device 100 can receive the response request signal. Upon receiving the response request signal from the vehicle 1, the portable device 100 transmits a response signal to the response request signal. Note that the antenna 100a of the portable device 100 will also be described as a single antenna 100a that receives LF waves and transmits RF waves. However, the reception of LF waves and the transmission of RF waves may be shared by dedicated antennas.

When the authentication device 20 of the vehicle 1 receives the response signal via the vehicle-mounted antenna 10 a and the wireless communication device 10 , it recognizes that the portable device 100 exists around the vehicle 1 . Specifically, the response request signal and the response signal are a series of signals, and are signals for confirming whether the portable device 100 is a legitimate portable device through transmission and reception of signals several times. The response signal includes a key authentication code for authenticating that the portable device 100 is legitimate, and also includes a physical authentication result indicating that the physical authentication has been successful. It can be said that the response request signal requesting transmission of this response signal is a transmission request requesting transmission of the physical authentication result.

In this embodiment, a time (hereinafter referred to as transmittable time) during which a response signal including a physical authentication result can be transmitted is set. If the elapsed time from the reading of the physical information exceeds the transmittable time, the portable device 100 does not transmit the response signal, that is, the physical authentication result to the vehicle 1 even if it receives the response request signal.

When the authentication device 20 of the vehicle 1 acquires the response signal from the wireless communication device 10, in addition to collating the key authentication code included in the response signal, it also checks whether the response signal includes the physical authentication result. do. When it is confirmed that the physical authentication result is included in addition to the verification of the key authentication code, the vehicle door lock is unlocked.

In this manner, the portable device 100 can implement passive entry as in the case of using a general portable device within a transmittable time after causing the portable device 100 to read physical information. On the other hand, after the transmittable time has passed, even if a response request signal is received from the vehicle 1, the response signal is not transmitted. Therefore, it is possible to avoid the risk of the vehicle 1 being stolen by being authenticated by an unauthorized method such as a relay attack.

[Configuration of portable device 100]
2 shows the internal configuration of the portable device 100. As shown in FIG. The portable device 100 includes a wireless communication section 101, a notification section 104, a setting switch 105, a storage section 106, a vibration sensor 107, and a control section 110 in addition to the physical information reader 100d described above.

The wireless communication section 101 has a transmission section 102 and a reception section 103 . The transmission unit 102 modulates and amplifies the signal input from the control unit 110, and transmits the signal from the antenna 100a as radio waves. The receiving unit 103 amplifies and demodulates the radio wave received by the antenna 100 a to extract a vehicle signal, and inputs the vehicle signal to the control unit 110 .

The notification unit 104 is a part that provides information to the user of the portable device 100 by means of one or more of sound, light, and vibration. A speaker, an indicator lamp, or a vibrating body can be used for the notification unit 104 . A setting switch 105 is a switch operated by the user when changing the transmittable time.

The storage unit 106 is writable and stores regular data. The authorized data is data determined from the bodily information of the authorized user, for example, data indicating the feature amount of the bodily information. Storage unit 106 also stores a transmittable time and a key authentication code indicating that portable device 100 is a legitimate portable device. In addition, in the storage unit 106, when the authentication of the physical information is successful, the physical authentication result indicating the success is also stored. The vibration sensor 107 is a sensor that detects vibrations occurring in the portable device 100 .

The control unit 110 can be realized by a configuration including at least one processor. For example, control unit 110 can be implemented by a computer including a CPU, ROM, RAM, I/O, and a bus line connecting these components. A program for causing a general-purpose computer to function as the control unit 110 is stored in the ROM. By executing the program stored in the ROM while the CPU uses the temporary storage function of the RAM, the control unit 110 controls the physical information acquisition unit 111, the physical information authentication unit 112, the clock unit 113, and the transmittable time change. It functions as a unit 114 , a vehicle signal acquisition unit 115 , an elapsed time determination unit 116 and a response signal generation unit 117 . Execution of these functions means that the method corresponding to the program is executed.

The physical information acquisition unit 111 is connected to the physical information reader 100d and acquires the physical information read by the physical information reader 100d. Physical information acquisition section 111 outputs the read physical information to physical information authentication section 112 .

When the physical information is input from the physical information acquiring unit 111, the physical information authenticating unit 112 performs authentication to confirm whether the physical information is that of a legitimate user. For authentication, authentication data determined from body information and normal data are used. Authentication data is, for example, a feature amount that can be extracted from physical information. Also, physical information itself may be used as authentication data. When physical information authentication unit 112 determines that the acquired physical information is the physical information of a legitimate user, physical information authentication unit 112 stores a physical authentication result indicating successful authentication in storage unit 106 .

Timekeeping unit 113 measures the elapsed time after physical information authentication unit 112 succeeds in authentication and the physical authentication result is stored in storage unit 106 .

Transmittable time changing unit 114 changes the transmittable time stored in storage unit 106 based on the operation of setting switch 105 by the user. Further, transmittable time changing section 114 may change the transmittable time when elapsed time determination section 116 actually makes a determination.

Transmittable time change unit 114 extends the transmittable time actually used for determination by elapsed time determination unit 116 when it is detected that portable device 100 is in use. The state of use is either the state of being in use or the state of being likely to be used within a certain period of time.

In the present embodiment, it is assumed that the portable device 100 is in use when vibration is detected by the vibration sensor 107 within a certain period of time in the past. If vibration has been detected within the past fixed period of time, it can be considered that the portable device 100 is moving with the user or the vehicle 1 . This is because there is a possibility that the portable device 100 will be used in this state. Transmittable time changing unit 114 also extends the transmittable time used for determination by elapsed time determination unit 116 when an unlock signal is input from receiving unit 103 . When extending the transmittable time used for determination by the elapsed time determination unit 116, the transmittable time stored in the storage unit 106 remains unchanged.

Vehicle signal acquisition unit 115 acquires a vehicle signal input from reception unit 103 . A vehicle signal is a signal transmitted from the vehicle 1 and includes a response request signal. Another vehicle signal is an unlock signal indicating that the vehicle door lock has been unlocked. Vehicle signal acquiring section 115 outputs a response request signal to elapsed time determining section 116 and outputs an unlocking signal to transmittable time changing section 114 .

When the response request signal is input from the vehicle signal acquisition unit 115, the elapsed time determination unit 116 confirms whether the physical authentication result is stored in the storage unit 106 and whether the elapsed time is within the transmittable time. do. If the physical authentication result is stored in the storage unit 106 and the elapsed time is within the transmittable time, the response signal generation unit 117 is instructed to generate a response signal. On the other hand, when the elapsed time exceeds the transmittable time, the notification unit 104 notifies that the elapsed time has passed the transmittable time. That is, when the response request signal is received after the elapsed time reaches the transmittable time, it is notified that the elapsed time has passed the transmittable time. Further, even before the response request signal is acquired, the elapsed time determination unit 116 notifies the fact from the notification unit 104 when the elapsed time has passed the transmittable time.

Response signal generation section 117 generates a response signal when instructed to generate a response signal by elapsed time determination section 116 , and inputs the generated response signal to transmission section 102 of wireless communication section 101 . When the response signal is input, the transmission section 102 modulates the response signal and transmits it as radio waves from the antenna 100a.

[Configuration of authentication device 20]
FIG. 3 shows the configuration of the authentication device 20. As shown in FIG. As shown in FIG. 3, the authentication device 20 includes a storage device 21 and a control device 30. As shown in FIG. Verification data for verifying the key authentication code of the portable device 100 is stored in the storage device 21 . The storage device 21 also stores regular data.

The controller 30 can be realized by a configuration with at least one processor. For example, the authentication device 20 can be realized by a computer including a CPU, ROM, RAM, I/O, and a bus line connecting these components. A program for causing a general-purpose computer to function as the authentication device 20 is stored in the ROM. The authentication device 20 functions as a vehicle signal generation unit 31 , a response signal acquisition unit 32 and a code authentication unit 33 by the CPU executing programs stored in the ROM while using the temporary storage function of the RAM.

The control device 30 is connected to an unlocking device 41, a driving force source control device 42, and the like via an in-vehicle LAN 40. As shown in FIG. The unlocking device 41 is a device for locking and unlocking the vehicle door lock. The driving force source control device 42 is a control device that controls the driving force source mounted on the vehicle 1 . The driving force source is one or both of an engine and a motor.

Vehicle signal generator 31 generates a vehicle signal that is a signal to be transmitted from vehicle 1 to portable device 100 . The vehicle signal includes the response request signal and the unlocking signal, as described above. The response request signal is generated periodically while the wireless communication device 10 is not communicating with the portable device 100 . The unlocking signal is a signal generated when the unlocking device 41 acquires that the vehicle door lock has been unlocked from the unlocking device 41 through the in-vehicle LAN 40 .

The response signal acquisition unit 32 acquires from the wireless communication device 10 the response signal transmitted by the portable device 100 and received by the wireless communication device 10 . When the response signal is acquired, the response signal acquisition section 32 outputs the key authentication code included in the response signal to the code authentication section 33 .

When the code authentication section 33 acquires the key authentication code from the response signal acquisition section 32 , the code authentication section 33 performs code authentication using the key authentication code and the verification code stored in the storage device 21 . Then, when the code authentication is successful, an operation permission signal is output to the unlocking device 41 or the driving force source control device 42 .

The code authentication unit 33 outputs the operation permission signal to the unlocking device 41 when it is recognized that the portable device 100 is outside the vehicle 1 . Determination of whether the portable device 100 is outside the vehicle 1 depends on whether the portable device 100 has responded to a response request signal transmitted outside the vehicle or whether the portable device 100 has responded to a response request signal transmitted toward the interior of the vehicle. to decide.

After the operation permission signal is output to the unlocking device 41 , the unlocking device 41 unlocks the doors of the vehicle 1 when the user touches the unlock sensor provided on the doorknob of the vehicle 1 . After the operation permission signal is output to the driving force source control device 42, when the user performs a driving force source starting operation such as pressing a push start button, the driving force source becomes ready to start. The state in which the driving force source can be started is a state in which the driving force source can start starting when the accelerator pedal is depressed.

[Flow of Processing Executed by Physical Information Authentication Unit 112]
The flow of processing executed by physical information authentication unit 112 will be described with reference to FIG. In step (hereinafter, step is omitted) S11, it is determined whether physical information is input from the physical information acquisition unit 111 or not. If the determination result is NO, the processing shown in FIG. 4 is terminated. If the judgment result of S11 is YES, it will progress to S12.

In S12, feature amounts are extracted from the input physical information. For example, if the physical information is a fingerprint, the feature amount is a numerical value representing a feature that allows the fingerprint to be distinguished from other fingerprints in terms of shape. In S<b>13 , regular data is read from storage unit 106 . In S14, the feature quantity extracted in S12 is compared with the regular data read out in S13, and authentication is performed to confirm whether the physical information acquired by the physical information acquisition unit 111 is that of a legitimate user. do.

In S15, it is determined whether or not the authentication has succeeded. If the authentication has not succeeded, the process of FIG. 4 ends without executing S16. On the other hand, if the authentication is successful, the process proceeds to S16. In S16, the physical authentication result indicating that the authentication was successful is stored in the storage unit 106. FIG.

[Processing for sending a response signal]
Processing when transmitting a response signal will be described with reference to FIG. In FIG. 5, S21, S22, and S26 are executed by the elapsed time determination unit 116, S23 to S25 are executed by the transmittable time change unit 114, and S27 is executed by the response signal generation unit 117. FIG.

In S21, it is determined whether or not a response request signal has been input from the vehicle signal acquisition section 115. FIG. If the determination result of S21 is NO, the process shown in FIG. 5 is terminated, and if the determination result of S21 is YES, the process proceeds to S22.

At S<b>22 , it is determined whether or not the physical authentication result is stored in the storage unit 106 . If the determination result of S22 is NO, the process shown in FIG. 5 is terminated, and if the determination result of S22 is YES, the process proceeds to S23.

In S23, it is determined whether or not the portable device 100 is in use. If the portable device 100 is in use, the process proceeds to S25, and if the portable device 100 is not in the use state, the process proceeds to S24.

In S24, it is determined whether or not an unlock signal has been received. Also when the unlocking signal is received, the process proceeds to S25. In S25, the transmittable time stored in the storage unit 106 is extended for a certain period of time. Therefore, when the portable device 100 is in use and when the unlocking information is received, the transmittable time is extended. By extending the transmittable time in these states, it is possible to prevent the response signal from not being transmitted due to the elapsed time exceeding the transmittable time. As a result, when the user tries to unlock the vehicle door lock or to operate the driving force source, it is possible to prevent the operation intended by the user from not being performed.

In S26, it is determined whether or not the elapsed time since the physical authentication result was stored in the storage unit 106 is within the transmittable time. If the determination result of S26 is NO, the process shown in FIG. 5 is terminated, and if the determination result is YES, the process proceeds to S27.

At S27, a response signal is generated. This response signal contains the key authentication code and the physical authentication result. In S<b>27 , the generated response signal is further output to transmission section 102 . When the response signal is output to transmission section 102, the response signal is transmitted as radio waves.

[Summary of the first embodiment]
In the passive entry system of the first embodiment described above, the portable device 100 receives the response request signal, and if the elapsed time is within the transmittable time (S26: YES), the response signal including the physical authentication result is transmitted (S27).

On the other hand, if the elapsed time exceeds the transmittable time (S26: NO), no response signal is transmitted even if the response request signal is received. As illustrated in FIG. 6, when the user of the vehicle 1 is authenticated when returning home and the doors of the vehicle 1 are locked, the portable device 100 is left at the front door. end up Even if a radio wave such as a response request signal is relayed using the repeater 5, the portable device 100 will not transmit a response signal after the transmittable time has passed. As a result, it is possible to prevent a situation in which the vehicle 1 is stolen due to authentication being established by an illegal method such as a so-called relay attack. Therefore, high crime prevention performance can be realized.

On the other hand, if the authorized user of the portable device 100 authenticates his/her physical information in advance when the transmittable time does not elapse when using the portable device 100, the physical authentication result is obtained when the response request is received. is sent. Therefore, deterioration of convenience is also suppressed.

Further, in the first embodiment, the transmittable time changing unit 114 is provided, and the transmittable time can be changed based on the user's setting operation. As a result, the user can set an appropriate transmittable time assuming a case where the user leaves home and gets into the vehicle 1 after authenticating the physical information at home. In this way, by enabling the user to change the time allowed for transmission, it is possible to set an appropriate time for transmission according to the circumstances of each user. can achieve

Further, in the first embodiment, when it is determined that the portable device 100 is in use (S23: YES), the transmittable time is extended. As a result, when the portable device 100 is carried to the vehicle 1, the transmittable time is extended. Therefore, it is possible to prevent the door lock from being unlocked because the response signal is not transmitted when the authorized user gets into the vehicle 1 . Also, since the transmittable time stored in the storage unit 106 is not changed, the transmittable time when the portable device 100 is not in use becomes relatively short. Therefore, it is possible to improve the security performance when the authorized user does not use the portable device 100 .

Moreover, the portable device 100 of the first embodiment extends the transmittable time even when the unlocking signal is received (S24: YES). As a result, although the transmittable time has not been reached at the time of getting into the vehicle 1, the transmittable time has been exceeded when trying to start the driving force source after getting into the vehicle 1, and the vehicle 1 cannot be run. You can prevent situations where you can't.

<Second embodiment>
Next, a second embodiment will be described. In the following description of the second embodiment, the elements having the same reference numerals as those used so far are the same as the elements having the same reference numerals in the previous embodiments unless otherwise specified. Moreover, when only part of the configuration is described, the previously described embodiments can be applied to the other portions of the configuration.

In the first embodiment described above, the portable device 100 authenticates the physical information. Embodiments differ.

FIG. 7 shows the internal configuration of the portable device 200 of the second embodiment. This portable device 200 is partially different from the portable device 100 of the first embodiment in functions executed by a control unit 210 . Specifically, the control unit 210 does not include the physical information authentication unit 112 that the control unit 110 of the first embodiment includes, but instead includes a feature amount extraction unit 212 . Also, the content of the response signal generated by the response signal generator 217 is different from the response signal generated by the response signal generator 117 of the first embodiment.

When physical information is input from physical information acquisition section 111, feature amount extraction section 212 extracts a feature amount from the physical information. Then, the extracted feature amount is stored in the storage unit 106 . Since the feature amount is stored in the storage unit 106 instead of the physical information authentication result, the response signal generated by the response signal generation unit 217 includes the feature amount stored in the storage unit 106 instead of the physical authentication result. is included. This feature amount is authentication data.

FIG. 8 shows the internal configuration of the authentication device 1020 of the second embodiment. The authentication device 1020 is partially different from the control device 30 of the first embodiment in functions executed by the control device 1030 . Specifically, the control device 1030 includes a physical information authentication unit 1034 in addition to the functions of the control device 30 of the first embodiment. Also, the processing executed by the code authentication unit 1033 is different from that of the code authentication unit 33 of the first embodiment. Furthermore, in the second embodiment, the authorized data stored in the storage unit 106 of the portable device 100 in the first embodiment is stored in the storage device 21 .

Physical information authentication section 1034 acquires the feature amount included in the response signal from response signal acquisition section 32 . Physical information authentication unit 1034 also acquires regular data from storage device 21 . Then, the feature amount is compared with the authorized data, and authentication is performed to confirm whether or not the physical information indicated by the feature amount is that of an authorized user. If the authentication is successful, the physical authentication result indicating that the authentication is successful is input to the code authentication section 1033 .

The code authentication unit 1033 performs code authentication similar to the code authentication unit 33 of the first embodiment. However, the operation permission signal is not output only by successful code authentication. Code authentication section 1033 outputs an operation permission signal when code authentication is successful and when body authentication result indicating that authentication is successful is acquired from body information authentication section 1034 .

[Summary of the second embodiment]
In the second embodiment, since physical information is authenticated on the vehicle side, the content of the response signal generated by the response signal generator 217 differs from that in the first embodiment. However, as in the first embodiment, the portable device 200 does not transmit the response signal if the elapsed time exceeds the transmittable time. Therefore, similarly to the first embodiment, it is possible to suppress deterioration of convenience while achieving high security performance.

Although the embodiments have been described above, the disclosed technology is not limited to the above-described embodiments, and the following modifications are also included in the disclosed scope. Various modifications can be made.

<Modification 1>
The transmittable time changing unit 114 may change the transmittable time according to the position where the portable device 100 is present. In order to detect the position, the portable device 100 has a position detection device that detects the current position. Also, if the mobile device 100 does not include a position detection device and is capable of short-range wireless communication with another mobile terminal (smartphone, etc.), the current location may be acquired from the other mobile terminal.

Portable device 100 also has a map that determines the transmittable time according to the current location, or a map that determines the extent to which the transmittable time stored in storage unit 106 is varied according to the current location. Then, based on the map and the current position, the transmittable time is changed.

In this way, for example, in areas where vehicle thefts are frequent, the map is set so that the transmittable time is set to be relatively short, thereby realizing higher crime prevention performance.

<Modification 2>
In the embodiment, when vibration is detected by the vibration sensor 107 within the past fixed time, the portable device 100 is in a state of being used. Alternatively or additionally, however, the portable device 100 may be in use when the position of the portable device 100 has changed within a certain period of time in the past.

<Modification 3>
In the second embodiment, the response signal includes the feature amount extracted from the physical information and is transmitted. Body information may be included in the response signal and transmitted instead of the feature amount.

<Modification 4>
The controllers 110, 210, controllers 30, 1030 and techniques described in the embodiments can be performed by a dedicated computer comprising a processor programmed to perform one or more functions embodied by a computer program. may be implemented. Alternatively, the controllers 110, 210, controllers 30, 1030 and techniques thereof may be implemented by dedicated hardware logic circuits. Alternatively, the controllers 110, 210, controllers 30, 1030 and methods thereof are implemented by one or more dedicated computers configured by a combination of a processor executing a computer program and one or more hardware logic circuits. good too. Hardware logic circuits are, for example, ASICs and FPGAs.

Moreover, the storage medium for storing the computer program is not limited to the ROM, and may be stored in a computer-readable non-transition tangible storage medium as instructions executed by the computer. For example, the program may be stored in a flash memory.

1: vehicle 5: repeater 10: wireless communication device 10a: vehicle antenna 20: authentication device 21: storage device 30: control device 31: vehicle signal generation unit 32: response signal acquisition unit 33: code authentication unit 40: in-vehicle LAN 41 : unlocking device 42: driving force source control device 100: portable device 100a: antenna 100d: physical information reader 101: wireless communication unit 102: transmitting unit 103: receiving unit 104: reporting unit 105: setting switch 106: storage unit 107 : vibration sensor 110: control unit 111: physical information acquisition unit 112: physical information authentication unit 113: timer unit 114: transmittable time change unit 115: vehicle signal acquisition unit 116: elapsed time determination unit 117: response signal generation unit 200: Portable device 210: Control unit 212: Feature amount extraction unit 217: Response signal generation unit 1020: Authentication device 1030: Control device 1033: Code authentication unit 1034: Physical information authentication unit

Claims (7)

A portable device (100) carried by a user of a vehicle (1) and communicating with a wireless communication device (10) mounted on the vehicle,
a physical information acquisition unit (111) for acquiring physical information including physical characteristics of the user;
a physical information authentication unit (112) that performs authentication based on authentication data determined from the physical information read from the user and authorized data determined from the physical information of the authorized user;
a storage unit (106) for storing a result of body authentication indicating that the authentication is successful when the body information authentication unit succeeds in authentication;
a timing unit (113) for measuring elapsed time after successful authentication by the physical information authentication unit;
a receiving unit (103) that receives a transmission request for the physical authentication result from the wireless communication device;
an elapsed time determination unit (116) that determines whether the elapsed time at the time of receiving the transmission request is within the transmittable time;
a transmission unit (102) for transmitting the physical authentication result stored in the storage unit when the elapsed time determination unit determines that it is within the transmittable time;
a transmittable time changing unit (114) for changing the transmittable time;
a map indicating locations for increasing or decreasing the set value of the transmittable time;
A position acquisition unit that acquires the position of the portable device ,
The portable device, wherein the transmittable time change unit changes the set value of the transmittable time to a value according to the position where the portable device is present, using the map. 2. The portable device according to claim 1 , wherein said transmittable time changing unit changes said transmittable time based on a user's setting operation. The transmittable time changing unit, when it is possible to detect that the portable device is in use, is more likely to transmit than when it is not possible to detect that the portable device is in use. 2. The portable device according to claim 1 , which extends the available time. 2. The transmittable time change unit according to claim 1 , wherein said transmittable time change unit extends said transmittable time when receiving an unlocking signal indicating unlocking of a door lock of said vehicle after transmitting said physical authentication result. mobile phone. The portable device according to any one of claims 1 to 4 , wherein when the elapsed time has reached the transmittable time, the elapsed time judging section notifies that effect. 2. The elapsed time determining unit, when receiving the transmission request after the elapsed time reaches the transmittable time, notifies that the elapsed time exceeds the transmittable time. 6. The portable device according to any one of 1 to 5 . A portable device (100) carried by a user of a vehicle (1) and communicating with a wireless communication device (10) mounted on the vehicle,
a physical information acquisition unit (111) for acquiring physical information including physical characteristics of the user;
a storage unit (106) for storing authentication data determined from the physical information read from the user;
a timer (113) for measuring elapsed time after reading the physical information;
a receiving unit (103) for receiving a transmission request for the authentication data from the wireless communication device;
an elapsed time determination unit (116) that determines whether the elapsed time at the time of receiving the transmission request is within the transmittable time;
a transmission unit (102) for transmitting the authentication data stored in the storage unit when the elapsed time determination unit determines that it is within the transmittable time;
a transmittable time changing unit (114) for changing the transmittable time ;
a map showing locations where the transmittable time is lengthened or shortened;
A position acquisition unit that acquires the position of the portable device,
The portable device, wherein the transmittable time changing unit uses the map to change the transmittable time to a value corresponding to the position of the portable device.

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