JP2020118031A - Electric lock system - Google Patents

Abstract

To prevent a relay attack to an electric lock system that has a configuration in which a fixed control unit that is connected to a fixed switch transmits an authentication request in response to an unlock request that is input from the fixed switch, and commands an electric lock to switch from the locked state to the unlocked state on condition that authentication using unique identification information answered from a portable device that wirelessly communicates with the fixed control unit succeeds.SOLUTION: The electric lock system includes: a person detection sensor 40 that detects persons entering/exiting a particular passage area; and a command transmission unit 41 that commands a portable device 5 to stop a response function for an authentication request transmitted from a fixed control unit when the person detection sensor 40 detects a person exiting the passage area.SELECTED DRAWING: Figure 7

Description

The present invention relates to an electric lock system provided to switch an electric lock from a locked state to an unlocked state on the condition that a portable device is successfully authenticated.

This type of electric lock system generally has an installation switch and an installation control unit installed near a door to be locked and unlocked by an electric lock. A wireless communication antenna connected to the installation control unit and an installation switch are arranged outside the room. The installation switch is for manually inputting a lock/unlock request for the electric lock. The installation switch is arranged in an area where direct wireless communication with the installation control unit is possible. The portable device stores the unique identification information and wirelessly communicates with the installation control unit. The portable device is carried by an authorized person who locks and unlocks the electric lock, for example, a resident of the room. The installation control unit issues an authentication request in response to the locking/unlocking request input from the installation switch, and locks/unlocks the electric lock on condition that the unique identification information replied from the portable device that received the authentication request is successful. To switch between the two (for example, Patent Document 1).

JP 2004-190419 A

However, with the development of mobile communication in recent years, this type of electric lock system has a risk of being exposed to a joint attack by a plurality of criminals. That is, the crime group prepares a relay relay network including the first portable radio relay device and the second portable radio relay device and connecting these portable radio relay devices, and monitors the going out of the authorized person. When an authorized person locks the door with an electric lock and goes out, a criminal (tailing personnel) who possesses the first portable wireless relay device follows the authorized person. When the authorized person is far from the door and it takes time to return from the door, another criminal (intruder) who possesses the second portable wireless repeater operates the installation switch to operate the door. Enter the unlock request and wait in front of the door. The installation control unit that has received the unlock request sends an authentication request. The authentication request is relayed from the second portable radio relay device and reaches the first portable radio relay device carried by the tailing staff. The first portable device wireless repeater transmits the received authentication request. Then, the portable device possessed by the authorized person receives the authentication request and transmits the unique identification information in response to the authentication request. The unique identification information is relayed from the first portable wireless repeater and reaches the second portable wireless repeater in the front. The second portable wireless repeater transmits the arrived unique identification information. Then, the installation control unit receives the unique identification information and commands the electric lock to unlock (hereinafter, this cooperative attack is referred to as "relay attack").

In view of the above background, the problem to be solved by the present invention is to prevent a relay attack on an electric lock system.

A first invention for solving the above-mentioned problems includes an installation control unit for instructing an electric lock to switch between locking and unlocking, an installation switch connected to the installation control unit, and a portable device wirelessly communicating with the installation control unit. The installation control unit transmits an authentication request in response to an unlock request input from the installation switch, and switches from a locked state to an unlocked state on condition that the authentication of the unique identification information returned from the portable device is successful. In the electric lock system for instructing switching, the portable device has a contact sensation section that receives a direct operation, and switches the response of the authentication request depending on whether the contact sensation section is directly operated. It was done.

According to the first aspect of the present invention, it is possible to judge whether or not the authorized person may allow the portable device to respond, and directly give an operation to the touch sensitive unit to reflect the judgment on the portable device. For this reason, in the case of going out to receive a relay attack, the authorized person can refuse the response of the portable device and prevent the relay attack.

In the first aspect of the invention, the first mode in which the response is set to the normal state and the response is switched to the response enabled when the direct operation is performed, and the second mode in which the response is set to the normal state and the response is switched to the disabled state when the direct operation is performed Either of these may be adopted.

For example, the contact sensation unit includes a biometric sensor that acquires biometric unique information, and the portable device causes the direct operation of causing the biometric sensor to acquire the biometric unique information and authentication of the acquired biometric unique information succeeds. It is preferable to have a determination unit that permits the response under the condition. Here, the biometric unique information refers to information indicating a physical characteristic unique to each individual. In this example, a direct operation of touching the touch sensitive part with the human body and causing the biometric sensor to acquire the biometric unique information is performed. Therefore, in a situation where a portable device is carried in a bag or a pocket and is held by another object, there is no fear that the response will be switched even if another object in the bag or the like accidentally touches the touch sensitive section. In addition, the successful authentication of the biometric unique information in the determination unit means that the operation was performed directly by the authorized person. Since the response is allowed under this condition, there is no concern that a third party will switch the response whether the portable device is lost.

Further, the touch sensing unit may be an operation switch capable of manually switching whether to respond. In this example, a direct operation of moving the operation switch by hand is performed. In this example, there is no calculation processing for collating and authenticating the biometric sensor or biometric unique information, and the touch sensitive unit can be provided in the portable device with a relatively simple implementation. In this example, either the first aspect or the second aspect can be adopted.

A second invention for solving the above-mentioned problems includes an installation control unit for instructing an electric lock to switch between locking and unlocking, an installation switch connected to the installation control unit, and a portable device wirelessly communicating with the installation control unit. The installation control unit transmits an authentication request in response to an unlock request input from the installation switch, and switches from a locked state to an unlocked state on condition that the authentication of the unique identification information returned from the portable device is successful. In the electric lock system for instructing switching, the installation control unit includes a stationary biometric sensor that is connected to the installation control unit and acquires biometric unique information, and the installation control unit acquires and generates the biometric unique information by the installation biometric sensor. The configuration is adopted in which the authentication request is transmitted on condition that the authentication of the biometric unique information is successful.

According to the second invention, when the installation switch is operated, the installation biosensor acquires the biometric unique information of the authorized person, and if the authentication is not successful, the portable device is requested to authenticate the unique identification information. Do not send. That is, even if an intruder who attempts a relay attack operates the installation switch, the authentication request is not transmitted and the relay attack is not established.

The installation biosensor may be provided separately from the installation switch or may be provided integrally. When integrally provided, the operation of the installation switch and the operation of acquiring the biometric unique information can be performed in the same operation.

In the second invention, the collation process for authenticating the biometric information may be performed by either the installation control unit or the installation biosensor. For example, the arithmetic processing unit of the installed biometric sensor performs collation processing, and only when the authentication is successful, allow the installation switch to accept input, or allow the installation switch to transmit an unlock request to the installation control unit. In this case, the installation control unit sends an authentication request on condition that the biometric unique information is acquired and the acquired biometric unique information is successfully authenticated. In addition, if the installed biometric sensor performs verification processing, notifies the installation control unit of the authentication result, and the installation control unit issues an authentication request only when the authentication is successful. An authentication request will be sent on condition that the authentication is successful and the acquired biometric unique information is successfully authenticated. If the biometric unique information acquired by the installed biometric sensor is sent to the installation control unit, and the installation control unit performs verification processing and sends an authentication request only when the authentication is successful, the biometric unique information An authentication request is issued on condition that the acquisition occurs and the authentication of the acquired biometric information is successful.

A third invention for solving the above-mentioned problems includes an installation control unit for instructing an electric lock to switch between locking and unlocking, an installation switch connected to the installation control unit, and a portable device wirelessly communicating with the installation control unit. The installation control unit transmits an authentication request in response to an unlock request input from the installation switch, and switches from a locked state to an unlocked state on condition that the authentication of the unique identification information returned from the portable device is successful. In the electric lock system for instructing the switching of the above, a person detection sensor for detecting entry and exit of a person to and from a specific passage area, and a response to the authentication request when the person detection sensor detects a person going out of the passage area And a command transmission unit for instructing the portable device to stop the function.

According to the third aspect of the present invention, the person detection sensor is arranged in a specific traffic area through which the authorized person goes out, and the command transmission unit transmits the authentication request to the portable device possessed by the authorized person. It is possible to command the stop of the response function. The portable device that has received this command does not respond to the authentication request relayed to the destination even if it is received. Therefore, the relay attack cannot be established.

In the third invention, the installation control unit is provided with an installation biometric sensor for acquiring biometric information, and the installation control unit acquires and generates biometric information by the installation biosensor and the acquired biometric information. It is preferable to instruct the portable device to restore the response function on condition that the information is successfully authenticated. In this way, the response function can be reliably restored only to the authorized person who has succeeded in authenticating the biometric unique information.

When the third invention is applied to an apartment house, the person detection sensor and the command transmitting unit may be set to either a common area or an exclusive area of the apartment house.

In particular, when the human detection sensor and the command transmission unit are installed in the traffic area that belongs to the common area of the housing complex, it becomes unnecessary to install the human detection sensor and the command transmission unit in each home, and You can prevent relay attacks on the residents of your home.

As described above, any of the first to third inventions can prevent relay attack on the electric lock system.

Functional block diagram showing the overall configuration of the first embodiment The flowchart which shows the processing content of the determination part of 1st Embodiment. Functional block diagram showing a portable device of the second embodiment. Functional block diagram showing the overall configuration of the third embodiment The flowchart which shows the processing content of the installation control part of 3rd Embodiment. Functional block diagram showing the overall configuration of the fourth embodiment. A conceptual diagram showing a system operation when a resident of an apartment house goes out in the fourth embodiment. The flowchart which shows the processing content of the command transmission part of 4th Embodiment. A conceptual diagram showing a system operation when a resident of an apartment house returns home in the fourth embodiment.

As an example of the first invention, the electric lock system according to the first embodiment will be described with reference to FIGS. 1 and 2 of the accompanying drawings. As shown in FIG. 1, this electric lock system includes an installation control unit 2 that commands the electric lock 1 to switch between locking and unlocking, installation switches 3 and 4 connected to the installation control unit 2, and an installation control unit 2. And a portable device 5 for wireless communication. Further, the electric lock system includes an LF transmission unit 6 connected to the installation control unit 2 and an RF reception unit 7 connected to the installation control unit 2. The electric lock 1, the installation control unit 2, the LF transmission unit 6, and the RF reception unit 7 are installed in a building. The installation control unit 2 and each device 1, 3, 4, 6, 7 are connected by a wired signal transmission path.

The electric lock 1 shown in the figure is a device capable of electrically switching between locking and unlocking of a front door, and electrically switches the operating state between a locked state and an unlocked state in response to a command from the installation control unit 2. Has become.

The installation control unit 2 in the figure stores in advance, in the internal memory, unique identification information uniquely assigned to each portable device 5 that is authorized to lock and unlock the entrance door.

As the installation switches 3 and 4, a lock switch 3 and an unlock switch 4 are provided. Each of the installation switches 3 and 4 is operated by a push button method. The operation of pressing each of the installation switches 3 and 4 is converted into a signal indicating a lock request and an unlock request, and input to the installation control unit 2.

The installation control unit 2 transmits an authentication request in response to a lock request or an unlock request input from the installation switches 3 and 4, and the electric lock 1 of the electric lock 1 is output according to the authentication result of the unique identification information returned from the portable device 5. Whether or not lock/unlock switching is possible is determined, and the electric lock 1 is instructed to switch from the locked state to the unlocked state or to switch from the unlocked state to the locked state on condition that the unique identification information is successfully authenticated.

It should be noted that the installation control unit 2 performs switching of locking and unlocking of the electric lock, such as a PIN authentication unit that performs connection authentication between the electric lock 1 and the installation control unit 2 by collating a pairing code, a buzzer, a light emitting device, and the like in advance. It is also possible to appropriately connect or add an alarm device control function or the like for notifying residents.

The LF transmission unit 6 generates a digital signal in the LF band (hereinafter, referred to as “LF signal”) in which the authentication request transmitted from the installation control unit 2 is stored in a predetermined format, and wirelessly transmits the signal from a transmission antenna. It is a processing unit.

The RF receiving unit 7 receives an RF band digital signal (hereinafter, referred to as “RF signal”) transmitted from the portable device 5 in a predetermined format by a receiving antenna, and stores the unique signal stored in the received RF signal. It is a wireless communication processing unit that sends various information such as identification information to the installation control unit.

The portable device 5 in the figure includes a locking switch 8, an unlocking switch 9, a control unit 10, an LF receiving unit 11, an RF transmitting unit 12, a contact feeling unit 13, and a determining unit 14.

The locking switch 8 and the unlocking switch 9 each have a push button operated by the holder of the portable device 5. The operations of pressing the lock switch 8 and the unlock switch 9 are converted into signals indicating a lock request and an unlock request, respectively, and input to the control unit 10.

The LF receiving unit 11 receives a LF signal by a receiving antenna and performs a wireless receiving process of sending various information such as an authentication request stored in the received LF signal to the control unit 10.

The control unit 10 stores the unique identification information assigned to itself in the internal memory in advance. The control unit 10 transmits pre-registered unique identification information in response to a locking request or an unlocking request input from the locking switch 8 or the unlocking switch 9. In this transmission, the unique identification information and the lock request or unlock request corresponding to the above-mentioned input are transmitted as a set. Further, the control unit 10 responds with the unique identification information in response to the authentication request sent from the LF receiving unit 11.

Upon receiving the above-mentioned set and response, the RF transmitter 12 generates an RF signal in which the set and the response are stored in a predetermined format, and performs a wireless transmission process to emit from the transmitting antenna.

Generally, the LF band is used for transmission from the installation control unit 2 to the portable device 5, and the RF band is used for transmission from the portable device 5 to the installation control unit 2. These frequency bands are used for the purpose of limiting the battery consumption of the portable device 5 as well as the communication with a relatively short distance and the communication with high security. That is, in the LF band communication, which is also called a low frequency band of 100 kHz band (mainly 125 kHz), the communication range is relatively short, the transmission power is relatively large, and the induction electromagnetic field is used. It has the characteristics that it is not easily affected by the environment and is not easily disturbed by other propagation. On the other hand, communication in the RF band, which is also called a high frequency band in the 300 MHz band (mainly 315 MHz), has a characteristic that it can transmit a relatively long distance for the transmission power. The wireless communication between the installation control unit 2 and the portable device 5 preferably limits the communication area, but is not limited to the example shown in the figure. For example, an RF band is used for transmission from the installation control unit 2 to the portable device 5. You may.

In wireless communication between the installation control unit 2 and the portable device 5, generally, security information such as unique identification information sent by an RF signal is stored in an encrypted state and decrypted by the other party. ing.

The contact sensation unit 13 in the figure includes a portion that is directly operated, and is composed of a biometric sensor that acquires biometric unique information when the direct operation is performed. A person who carries the portable device 5 directly performs the operation of touching a predetermined portion of his/her hand with the touch sensitive unit 13 to read the biometric information. The contact feeling unit 13 sends the living body unique information acquired by the reading to the determination unit 14.

The determination unit 14 performs a biometric authentication process of collating the biometric unique information sent from the contact feeling unit 13 with the biometric unique information registered in advance. The biometric unique information registered in the determination unit 14 is obtained by previously obtaining the biometric unique information of a person who has the right to open and close the entrance door with a biometric sensor and stores the biometric unique information in the memory of the determination unit 14.

Since the portable device 5 is provided with the touch sensation unit 13, the biometric unique information that can be acquired from the hand is adopted. As a biometric authentication technique using such biometric unique information, it is possible to adopt biometric impedance as well as fingerprint authentication generally used. When the bioelectrical impedance is used, for example, the technique disclosed in Japanese Unexamined Patent Application Publication No. 2014-68989 can be used to realize the above-described touch sensitive unit and biometric authentication processing.

Moreover, the determination unit 14 controls whether or not signal transmission between the control unit 10 and the RF transmission unit 12 is possible. Specifically, as shown in FIGS. 1 and 2, the determination unit 14 normally rejects the relay of the signal transmitted from the control unit 10 to the RF transmission unit 12, and then determines whether or not the touch sensing unit 13 detects a living body. Waiting for unique information (waiting state). When the determination unit 14 receives the biometric unique information from the touch sensing unit 13 (S1), the determination unit 14 is allowed to relay the signal for a specified time, and receives the authentication request transmitted from the control unit 10 during this period. In this case, the signal is relayed to the RF transmission unit 12, and after the stipulated time has elapsed, the standby state is returned (S2, S3). As described above, since the biometric unique information sent to the determination unit 14 is obtained by the touch sensation unit by a direct operation on the touch sensation unit, the determination unit 14 determines whether the direct operation occurs and the acquired biometric unique information. If the authentication is successful, the above response will be allowed. That is, as the portable device 5, whether to respond to the authentication request described above is switched depending on the presence or absence of the direct operation described above.

According to the first embodiment as described above, the authorized person registered in the determination unit 14 holds the portable device 5 in his hand and directly operates the contact feeling unit 13, and within the specified time, the installation control unit is operated. Only when the portable device 5 responds to the authentication request from 2, the installation control unit 2 commands the electric lock 1 to be locked/unlocked. Therefore, when a relay attack is attempted, even if an authentication request arrives from the wireless relay of the tailing staff to the portable device 5, the regulation is performed after the authorized person directly operates the contact feeling unit 13 of the portable device 5. The relay attack does not work, except in the extremely accidental case that it is within the time. As described above, in the first embodiment, the relay attack on the electric lock system can be prevented only by improving the portable device 5. In addition, in a situation where the portable device 5 is carried in a bag or a pocket, even if another object such as a bag accidentally touches the contact feeling part 13, no biometric unique information is acquired and the portable device 5 is used. There is no worry that the response will be switched. Further, since the response is permitted on the condition of the direct operation by the authorized person, there is no fear that the response will be switched by the third party when the portable device 5 is lost.

In the first embodiment, when the portable device receives an LF signal, an appropriate hardware configuration and control program are adopted as long as the response to the LF signal is transmitted with the direct operation by the authorized person as an essential condition. be able to. For example, the determination unit may be implemented as a program executed by the control unit, and the LF signal reception of the control unit may be used as a trigger to accept the biometric authentication process only for a specified time.

A second embodiment will be described based on FIG. Only the differences from the first embodiment will be described below. In the second embodiment, the contact feeling part of the portable device 5 is changed as compared with the first embodiment. As shown in FIG. 3, the touch sensation unit 20 of the second embodiment includes an operation switch capable of manually switching whether to respond to the LF signal. The contact feeling part 20 in the figure has a push button provided at a position different from the locking switch 8 and the unlocking switch 9. The contact feeling unit 20 is an a-contact operation switch that can mechanically open and close the signal transmission path between the control unit 10 and the RF transmission unit 12. Normally, the touch sensation unit 20 is on standby with the signal transmission path opened, and therefore, even if the control unit 10 transmits a response corresponding to the LF signal, it does not reach the RF transmission unit 12. The above-mentioned response reaches the RF transmission unit 12 only when the person carrying the portable device 5 is performing a direct operation of pressing the contact feeling unit 20 to close the signal transmission path. That is, as the portable device 5, whether to respond to the above-mentioned authentication request is switched depending on the presence or absence of the above-mentioned direct operation.

According to the second embodiment as described above, the portable device 5 can be operated only when the holder of the portable device 5, which is usually a legitimate authority, holds it in the hand and directly operates the touch sensitive unit 20. In response to the authentication request from the installation control unit 2 shown in FIG. 1, the installation control unit 2 receives the request and instructs the electric lock 1 to switch between locking and unlocking. Therefore, when a relay attack is attempted, even if an authentication request arrives from the wireless relay of the tailing personnel to the portable device, a direct operation on the contact feeling unit 20 of the portable device 5 shown in FIG. 3 is caused. The relay attack will not work unless it is extremely accidental. As described above, the second embodiment can prevent a relay attack on the electric lock system by a relatively simple implementation in which a manual operation switch is added to the portable device 5 without adding a high function such as biometric authentication. it can.

In the second embodiment, the contact sensation unit may be an operation switch that can manually switch whether or not to respond to the LF signal, and can be changed to a b-contact switch. Further, the contact feeling unit is not limited to the mechanical switch, and may be a relay switch that electromagnetically switches between opening and closing according to a manual operation. Further, the contact feeling unit can be provided as a main power ON/OFF switch of the portable device.

A third embodiment as an example of the second invention will be described with reference to FIGS. In the third embodiment, the portable device 5 of the first embodiment is the same as the conventional one without the touch sensing unit and the determination unit, but is provided with the installation biosensor 30 connected to the installation control unit 2. Different from the embodiment. The installation biosensor 30 shown in the figure is integrated with the installation switch 4 for unlocking, and acquires the biometric unique information when the installation switch 4 is operated. The installation control unit 2 performs a biometric authentication process of collating the biometric unique information sent from the installation biometric sensor 30 with pre-registered biometric unique information, and when the biometric authentication is successful, the lock request or unlock request is issued. It has a judging means 31 which permits the transmission of the authentication request in response to the lock request and does not permit the transmission of the authentication request in response to the locking request or the unlocking request when it fails. Fingerprint authentication technology or bioimpedance authentication technology can be used for the installed biometric sensor 30 and the determination means 31.

Specifically, as shown in FIG. 5, the installation control unit 2 normally waits for an unlock request from the installation switch 4 in the locked state (standby state). When the installation switch 4 is operated, the unlock request corresponding to the operation and the biometric unique information acquired during the operation are sent to the installation control unit 2 as a set (S11). Upon receiving this, the determination means 31 of the installation control unit 2 collates the sent biometric unique information with the registered biometric unique information, and if there is a match among the registered biometric unique information, determines that the authentication is successful, If not, it is determined that the authentication has failed (S12). If the authentication is successful, the installation control unit 2 issues an authentication request (S13), and the LF transmission unit 6 that has received the authentication request transmits an LF signal. On the other hand, when the authentication fails, the installation control unit 2 ignores the lock request or the unlock request of the set and does not send the authentication request. If the authentication is successful, the installation control unit 2 waits for the reception of the RF signal, and when the RF signal is received within the specified time, sends a command corresponding to the locking request or the unlocking request to the electric lock 1 (S14-). S16). When the installation control unit 2 cannot receive the RF signal within the specified time, it issues the authentication request again, and the LF transmission unit 6 retransmits the LF signal (retransmission processing). The installation control unit 2 returns to the standby state when the RF signal cannot be received even after repeating the retransmission process a predetermined number of times (S14, S17).

As described above, according to the third embodiment, the installation control unit 2 sends an authentication request on condition that the installation biometric sensor 30 acquires the biometric unique information and the authentication unit succeeds in determining the acquired biometric unique information. It will be. Therefore, according to the third embodiment, even if an intruder who attempts a relay attack operates the installation switch, the installation controller 2 does not issue an authentication request and the relay attack is not established.

In the third embodiment, as the transmission condition of the LF signal corresponding to the locking or unlocking operation given to the installation switch, it is essential that the installation biosensor acquire and generate the biometric unique information and the biometric authentication succeeds by the determination means. As long as the above, an appropriate hardware configuration and control program can be adopted. For example, the essential condition can also be satisfied by providing a determination unit integrally with the installation biosensor and the installation switch, and not sending a locking request or an unlocking request to the installation control unit when biometric authentication fails. it can.

A fourth embodiment as an example of the third invention will be described with reference to FIGS. 6 to 9. The fourth embodiment further includes a human detection sensor 40 and a command transmitting unit 41 in the electric lock system according to the third embodiment. As shown in FIGS. 6 and 7, in the fourth embodiment, the electric lock system according to the third embodiment is applied to each house of an apartment house such as a condominium, and a common doorway belonging to a common part of the apartment house is opened and closed. The human detection sensor 40 and the command transmission unit 41 are installed near the automatic door 42, and the opening control of the automatic door 42 using these is realized. Note that, in FIG. 6, only main parts of the portable device 5 and the building-side device of the electric lock system provided in each home are illustrated.

Specifically, as shown in FIGS. 6 and 7, the human detection sensor 40 detects the entrance and exit of a person to and from a specific traffic area. In the figure, the specific passage area is set to the passage on the site located outside the automatic door 42. The human detection sensor 40 and the command transmission unit 41 are installed on the passage in the site. The human detection sensor 40 outputs a determination result based on an output signal of the sensor unit that detects the presence of a person, that is, a person who approaches the sensor unit or a person who separates from the sensor unit. As the human detection sensor 40, an appropriate type that uses infrared rays, ultrasonic waves, visible light, or the like can be adopted as long as it is possible to obtain information capable of determining the approach and separation of a person. The human detection sensor 40 sends the determination result of the approaching person or the leaving person to the command transmitting unit 41 each time it is detected.

The command transmission unit 41 has the same LF transmission unit, RF reception unit, and installation control unit as in the first embodiment, and the installation control unit 2 instructs the portable device 5 to stop and restore the response function. 43 has been added by installing a program. As shown in FIG. 6 and FIG. 8, when the person detection sensor 40 detects a person coming into the traffic area, that is, the approaching person, the command transmitting unit 41, which is informed of this, notifies the authentication request and The LF signal including the command to restore the response function is transmitted from the LF transmitter 6 of itself to the portable device 5 (S21 to S23). On the other hand, when the person detection sensor 40 detects a person who is going out of the traffic area, that is, the person who has left the area, the command transmitting unit 41 informed of this includes a stop command of the response function to the authentication request. The LF signal is transmitted from its own LF transmitter 6 to the portable device 5 (S21, S24). The command transmitting unit 41 also has a function of sending an opening command to the automatic door when the unique identification information responded by the RF signal from the portable device 5 is successfully authenticated (S25 to S28).

In the control unit 10 of the portable device 5, a response ON/OFF means 44 for stopping or restoring the response function to the LF signal in accordance with an instruction to restore or stop the response function included in the LF signal is mounted by installing a program. ..

The installation control unit 2 of the electric lock system provided in each home is provided with the portable device 5 on condition that the installation biometric sensor 30 of its own obtains the biometric unique information and the authentication unit 31 of the acquired biometric unique information succeeds in the authentication. Sends a command to restore the response function and an authentication request.

According to such a fourth embodiment, as shown in FIG. 7, when the resident carrying the portable device 5 goes out, the human detection sensor 40 detects the approach of the resident to the automatic door, and the output of this detection. Upon receiving the signal, the command transmitting unit 41 commands the portable device 5 to restore the response function and to request the authentication with the LF signal. At this time, since the response function of the portable device 5 is normally alive, this restoration command has no special meaning. Since the command transmitting unit 41 succeeds in authenticating the unique identification information responded by the RF signal from the portable device 5, it transmits an opening command to the automatic door 42. When the resident who has exited from the automatic door 42 advances and separates from the human detection sensor 40, the human detection sensor 40 detects this separation, and the command transmitting unit 41 that receives the output signal of this detection, The stop of the response function is commanded by the LF signal. The portable device 5 receiving this command stops the response function to the LF signal. Therefore, even if the portable device 5 receives the authentication request relayed to the destination, the portable device 5 does not respond to the authentication request. Therefore, the relay attack cannot be established. As described above, according to the fourth embodiment, it is possible to prevent the relay attack for the resident of each home while eliminating the need to install the person detection sensor 40 and the command transmission unit 41 in each home.

On the other hand, as shown in FIG. 9, even when a resident carrying the portable device 5 returns home through the automatic door 42, the human detection sensor 40 and the command transmitting unit 41 output the output signal and the command in the same manner as when going out. Emit. Therefore, when the resident arrives in front of the front door of his/her home, the response function of the portable device 5 is usually stopped. When the resident operates the installation switch 4 at home, the installation biometric sensor 30 acquires the biometric unique information. Upon receiving the unlock request and the biometric-specific information, the installation control unit 2 sends a response function restoration command and an authentication request to the portable device 5 upon successful biometric authentication, and an LF signal including these sets is transmitted to the portable device 5. Reach. As a result, the portable device 5 restores the response function and transmits a response to the authentication request as an RF signal. As a result, the front door of the home will be unlocked. As described above, in the fourth embodiment, the response function can be reliably restored only to the authorized person who has successfully authenticated the biometric unique information.

It should be noted that the person detection sensor and the command transmission unit may be installed for each electric lock system of each home instead of on the passage of the common unit as in the fourth embodiment. Also, when the response function is restored to the portable device of the resident who has returned home in the subsystem of each home, biometric authentication can be omitted from the conditions. In addition, a person detection sensor not only detects the entry and exit of a specific traffic area, but also a highly functional one that can detect the exit direction from inside the building to outside the building, from outside the building to inside the building If so, the human detection sensor sends information indicating the escape direction to the command transmitting unit, and the command transmitting unit determines whether to instruct the portable device to stop or restore the response function according to the escape direction. You may do it. Further, the portable device is provided with a vibrator means and a notification sound generating means, and when the response ON/OFF means restores the response function, it sends an operation command to the vibrator means etc. to notify the owner of the portable device of the restoration of the response function. You may do it.

The technical scope of the present invention is not limited to the above-described embodiments and includes all modifications within the scope of the technical idea based on the description of the claims.

DESCRIPTION OF SYMBOLS 1 Electric lock 2 Installation control part 3,4 Installation switch 5 Portable device 6 LF transmission part 7 RF reception part 10 Control part 11 LF reception part 12 RF transmission part 13,20 Contact feeling part 14 Judgment part 30 Installation biosensor 31 Judgment means 40 Human Detection Sensor 41 Command Transmitter 42 Automatic Door 43 Command Means 44 Response ON/OFF Means

Claims (3)

An installation control unit that commands the electric lock to switch between locking and unlocking, an installation switch connected to the installation control unit, and a portable device that wirelessly communicates with the installation control unit,
The installation control unit issues an authentication request in response to an unlock request input from the installation switch, and switches from a locked state to an unlocked state on condition that the unique identification information returned from the portable device is successfully authenticated. In the electric lock system that commands
A person detection sensor for detecting the entrance and exit of people to and from a specific traffic area,
When the person detection sensor detects a person going out of the traffic area, a command transmission unit for instructing the portable device to stop the response function to the authentication request,
An electric lock system comprising: Connected to the installation control unit, equipped with an installation biosensor for acquiring biometric information,
The electric lock according to claim 1, wherein the installation control unit instructs the portable device to restore the response function on condition that acquisition of biometric unique information by the installed biometric sensor and successful authentication of the acquired biometric unique information are performed. system. The electric lock system according to claim 1 or 2, wherein the human detection sensor and the command transmission unit are installed in the traffic area belonging to a common area of an apartment house.

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