JP6986905B2 - Electronic key and communication control method - Google Patents

Description

The present invention relates to an electronic key and a communication control method.

Currently, when a push operation is performed on the operation unit of the door lock / unlock control device, wireless communication is performed with the wireless communication device owned by the user, and the door is automatically locked or unlocked. The system has been put into practical use (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2003-343131

However, while this type of authentication method is highly convenient, it uses a repeater to detect the problem that the door can be unlocked from the outside immediately after the door is unlocked and locked immediately after returning home, and the system is vulnerable. There was a concern that crimes such as theft would occur due to the so-called relay attack that unlocks illegally.

Therefore, the present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide an electronic key and a communication control method for improving crime prevention by preventing unauthorized unlocking of the key.

Embodiment 1; One or more embodiments of the present invention is an electronic key possessed by a user and performing wireless communication with an electric lock that locks and unlocks a door, and controls the wireless communication between the electric lock and the electric lock. A communication control unit is provided, and the communication control unit performs authentication communication for unlocking with the electric lock for a predetermined period after the authentication communication for locking is completed with the electric lock. We are proposing an electronic key that features invalidation.

Embodiment 2; In one or more embodiments of the present invention, when the communication control unit detects that the authentication signal for unlocking from the electric lock has been received within the predetermined period, the communication control unit has received the authentication signal for unlocking. We are proposing an electronic key characterized by extending the predetermined period.

Embodiment 3; One or more embodiments of the present invention propose an electronic key characterized in that the user includes a variable portion for varying the predetermined period.

Embodiment 4; One or more embodiments of the present invention propose an electronic key comprising a release unit for releasing the invalidation of the authentication communication for unlocking by the user.

Embodiment 5; One or more embodiments of the present invention is a communication control method in an electronic key that is possessed by a user and performs wireless communication with an electric lock that locks and unlocks a door, and is said to be between the electric lock and the electric lock. The communication control unit that controls the wireless communication invalidates the authentication communication for unlocking with the electric lock for a predetermined period after the authentication communication for locking with the electric lock is completed. We are proposing a communication control method characterized by this.

According to one or more embodiments of the present invention, there is an effect that crime prevention can be improved by preventing unauthorized unlocking of the lock.

It is a figure which shows the structure of the locking / unlocking system which uses the electronic key which concerns on embodiment of this invention. It is a figure which shows the structure of the electronic key which concerns on embodiment of this invention. It is a figure which shows the structure of the electric lock which concerns on embodiment of this invention. It is a figure which shows the appearance of the electric lock and the electronic key which concerns on embodiment of this invention. It is a figure which shows the communication area of the locking / unlocking system which uses the electronic key which concerns on embodiment of this invention. It is a figure which exemplifies the stalker measures function in the locking / unlocking system which uses the electronic key which concerns on embodiment of this invention. It is a figure which illustrates the relay attack measures function in the locking / unlocking system which uses the electronic key which concerns on embodiment of this invention. It is a figure which exemplifies the misplacement prevention function in the locking / unlocking system which uses the electronic key which concerns on embodiment of this invention. It is a processing flow of the electronic key which concerns on embodiment of this invention. It is a processing flow of the electronic key which concerns on embodiment of this invention. It is a processing flow of the electronic key which concerns on embodiment of this invention. It is a processing flow of the electronic key which concerns on embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 12.

<Configuration of locking / unlocking system>
As shown in FIG. 1, the locking / unlocking system in which the electronic key according to the embodiment of the present invention is used is composed of an electronic key 100 and an electric lock 200, and the system includes an electronic key 100 and an electric lock. A wireless signal is transmitted to and received from the 200 to control locking and unlocking.

<Electronic key configuration>
As shown in FIG. 2, the electronic key 100 includes a lock switch 110, an unlock switch 120, an LF receiving unit 130, a receiving antenna 140, a UHF transmitting unit 150, a transmitting antenna 160, and a communication control unit 170. It is composed of. Further, the communication control unit 170 has a built-in memory 171, a timer 172, a variable unit 173, and a release unit 174. The electronic key 100 has undergone authentication processing with the electric lock 200 by the user pressing the lock switch 110 or the unlock switch 120 of the electronic key 100, or by using a wireless signal transmitted from the electric lock 200. After that, the electric lock 200 is used to lock and unlock the door.

Hereinafter, the authentication method will be described.
First, as the first authentication method, when the user presses the lock switch 110 or the unlock switch 120, the electronic key 100 is activated from the hibernation state, and the UHF band unlock signal or the lock signal is transmitted via the transmission antenna 160. It is transmitted to the electric lock 200. This type of authentication method is called wireless authentication.

On the other hand, as another authentication method, a challenge code signal described later, which is a magnetic field signal in the LF band transmitted from the electric lock 200 by the operation of the activation switch (operation unit) 270 provided on the electric lock 200 described later by the user. Is received by the LF receiving unit 130 via the receiving antenna 140, and the received challenge code signal is output to the communication control unit 170. When the challenge code signal is input, the communication control unit 170 activates the electronic key 100 from the hibernation state. Further, the communication control unit 170 creates a response code calculated from the input challenge code signal and the ID code unique to the electronic key stored in the memory 171. When the communication control unit 170 inputs the challenge code signal and matches the challenge code stored in the memory 171 of the electronic key 100, the communication control unit 170 transmits a UHF band response code signal from the UHF transmitter unit 150 via the transmission antenna 160. Send to the electric lock 200. This type of authentication method is called passive authentication.

The challenge code signal is a challenge code preset in the control unit 250, which will be described later, set in accordance with the registration order of the electronic keys 100 in the control unit 250, and is given to a plurality of electronic keys 100 registered in the control unit 250. It is stored in the memory 252 in association with the ID code unique to each electronic key. When a plurality of registered electronic keys 100 are within the communication area (LF range), the challenge code signal is sequentially sent to each of the electronic keys 100 in order to avoid interference. That is, when the challenge code signal corresponding to the first registered electronic key 100 is transmitted, only the electronic key 100 associated with the first electronic key 100 returns the response code signal, and the other electronic keys 100 return the response code signal. Will not reply. The challenge code signal includes a lock challenge code signal and an unlock challenge code signal, and the response code signal includes a lock response code signal and an unlock response code signal. In the following, these signals will be described separately according to the intended use.

As described above, the electronic key 100 according to the present embodiment supports both wireless authentication and passive authentication.

In addition to the well-known functions described above, the communication control unit 170 communicates with the electric lock 200 for unlocking for a predetermined period after the authentication communication for locking is completed. To disable. The counting of the predetermined period is performed by the timer 172 in the electronic key 100.

Here, the completion of the authentication communication for locking means that the user presses the lock switch 110 of the electronic key 100 by wireless authentication, and the signal transmitted from the electronic key 100 to the electric lock 200 is authenticated to generate electricity. When the lock 200 is locked and by passive authentication, the electronic key 100 returns a lock response code signal in response to the lock challenge code signal from the electric lock 200, and is transmitted from the electronic key 100 to the electric lock 200. This includes both cases where the electric lock 200 is locked by authenticating the lock response code signal.

Further, the electronic key 100 invalidates the authentication communication for unlocking with the electric lock 200, specifically, in response to the unlocking challenge code signal transmitted from the electric lock 200, electronically. For example, a process for prohibiting the return of the unlocking response code signal from the key 100 to the electric lock 200 can be exemplified.

Further, as a process of invalidating the authentication communication for unlocking with the electric lock 200 by the electronic key 100, the unlocking challenge code signal transmitted from the electric lock 200 in the electronic key 100 for a predetermined period is performed. Reception may be prohibited. Specifically, when the authentication communication for locking is completed with the electric lock 200, the timer 172 is activated and, for example, the timer 172 is arranged in series between the receiving antenna 140 and the LF receiving unit 130. The switching unit 170 may be controlled by the communication control unit 170 to open the space between the receiving antenna 140 and the LF receiving unit 130 until the timer counts up.

Further, although the electronic key 100 has been illustrated above, the electronic key 100 has detected that the lock has been locked by turning the key cylinder of the electric lock 200 using a mechanical key instead of the electronic key 100. In some cases, it can also be applied when executing the above invalidation process.

Further, in the above, the authentication for unlocking with the electric lock 200 is performed for a predetermined period from the time when the electronic key 100 returns the lock response code signal in response to the lock challenge code signal from the electric lock 200. Although the example of disabling communication is illustrated, a signal indicating that the lock has been locked is transmitted from the electric lock 200 to the electronic key 100, and the electric lock 200 is used for a predetermined period from the time when the electronic key 100 receives the signal. You may want to disable the authentication communication for unlocking between.

Further, when the communication control unit 170 detects that the authentication signal for unlocking from the electric lock 200 is received within the predetermined period, the communication control unit 170 extends the predetermined period.

The variable unit 180 changes the predetermined period by the operation of the user. The unlocking unit 190 cancels the invalidation of the authentication communication for unlocking by the user's operation.

<Composition of electric lock>
As shown in FIG. 3, the electric lock 200 includes an LF transmitting unit 210, a transmitting antenna 220, a UHF receiving unit 230, a receiving antenna 240, a control unit 250, a door locking / unlocking unit 260, and a start switch. (Operation unit) 270, a door open / close detection unit 280, and a battery 290. Further, the control unit 250 is composed of a timer 251 and a memory 252, and the door locking / unlocking unit 260 is composed of a locking / unlocking detection unit 261 and a locking mechanism 263.

The LF transmitting unit 210 transmits a challenge code signal to the electronic key 100 via the transmitting antenna 220. The UHF receiving unit 230 receives a response code signal or a lock / unlock signal from the electronic key 100 via the receiving antenna 240.

The control unit 250 controls the operation of the entire electric lock 200 by a control program stored in the memory 252, which will be described later. The timer 251 in the control unit 250 clocks a predetermined predetermined time. The memory 252 stores the above-mentioned control program, various data, and the like.

The lock / unlock detection unit 261 of the door lock / unlock unit 260 detects the lock / unlock state of the lock mechanism 263.

The start switch (operation unit) 270 accepts a user's operation. Then, when the start switch (operation unit) 270 receives the user's operation, the control unit 250 controls the LF transmission unit 210 to transmit the challenge code signal toward the communication area. The challenge code signal is transmitted by determining whether it is a lock challenge code signal or an unlock challenge code signal according to the lock / unlock state of the lock mechanism 263 and the control content. The door open / close detection unit 280 detects the open / closed state of the door. The battery 290 is a power source that supplies electric power to the control unit 250 and the door locking / unlocking unit 260.

<Appearance configuration of electronic key and electric lock>
As shown in FIG. 4, the electronic key 100 has an external configuration in which the lock switch 110 and the unlock switch 120 are provided in the main body, and the electric lock 200 is, for example, in the central portion on the left side of the door and on the door handle 203. It has an exterior configuration provided on the top. As shown in FIG. 4, the electric lock 200 is provided on the door 201 and includes a door handle 203 connected to a lock mechanism (not shown) and an operation lock portion 202 attached to the outside of the door. The start switch (operation unit) 270 is provided in 202.

Further, as shown in FIG. 5, the door 201 has substantially the same plane as the outer wall on the outdoor side, and has a communication area (LF range) having substantially the same area indoors and outdoors centering on the electric lock 200. It is formed. Similarly, a communication area (UHF range) having substantially the same area indoors and outdoors around the electric lock 200 and having a wider communication area area than the communication area (LF range) is formed. The reason why the communication area in the UHF range has a wider communication area than the communication area in the LF range is due to the frequency band used.

6 to 8 show measures against stalking, measures against relay attack, and measures against misplacement in the locking / unlocking system using the electronic key according to the present embodiment.
Here, as a measure against stalking, as shown in FIG. 6, after returning home, a touch unlocking operation (unlocking operation by the start switch (operation unit) 270) (1) was performed, and the room was entered and the locking operation was performed (1). 2) After that, even if the electronic key 100 stays in the LF detection area in the room, it means a function that cannot be unlocked by operating the touch button (start switch (operation unit) 270) from the outside of the room for a certain period of time.

As a measure against relay attack, as shown in FIG. 7, a touch unlocking operation from the room (unlocking operation by the start switch (operation unit) 270) (1) was performed, and a locking operation was performed outdoors (2). ) After that, until the approximate time until the electronic key 100 goes out of the outdoor LF detection area (3) elapses, even if there is a touch unlock operation (4) -1 from the outdoor, the electric lock Reference numeral 200 is a function of stopping the transmission of the challenge code signal so that the lock cannot be unlocked.

As a measure against misplacement, as shown in FIG. 8, after returning home, a touch unlocking operation (unlocking operation by the start switch (operation unit) 270) (1) was performed, and the room was entered and the locking operation was performed (2). After that, if the electronic key 100 is left in the LF detection area near the door, the electronic key 100 is invalidated (3), and even if there is a touch operation from the outside, the electric lock 200 is a challenge code. A function that stops the transmission of signals so that the lock cannot be unlocked (4). The invalidated electronic key 100 is restored when the electric lock 200 is unlocked.

<Processing of electronic keys>
The processing of the electronic key 100 according to the present embodiment will be described with reference to FIGS. 9 to 12.

FIG. 9 is a processing flow for determining the operation input of the electronic key 100 and a processing flow for canceling the invalidation of the authentication communication for unlocking between the electric lock 200 and the electric lock 200 when the timer 172 clocks a predetermined time.
First, the communication control unit 170 of the electronic key 100 determines whether or not the LF signal (unlocking challenge code signal or locking challenge code signal) has been received by the LF receiving unit 130 (step S101). At this time, when the communication control unit 170 determines that the LF signal is received by the LF receiving unit 130 (“Yes” in step S101), the process proceeds to (2).

On the other hand, when the communication control unit 170 determines that the LF reception unit 130 has not received the LF signal (“No” in step S101), whether or not the lock switch 110 or the unlock switch 120 is pressed. (Step S102). At this time, when the communication control unit 170 determines that the lock switch 110 or the unlock switch 120 has been pressed (“Yes” in step S102), the process proceeds to (3).

Further, when the communication control unit 170 determines that the lock switch 110 or the unlock switch 120 is not pressed (“No” in step S102), it is determined whether or not the prohibition timer has been set infinitely (“No”). Step S103). At this time, when the communication control unit 170 determines that the prohibition timer has been set infinitely (“Yes” in step S103), the process returns to step S101. Here, the prohibition timer is a timer 172 for prohibiting the electronic key 100 from returning the unlocking response code signal to the electric lock 200 for a predetermined time.

On the other hand, when the communication control unit 170 determines that the prohibition timer has not been set infinitely (“No” in step S103), the communication control unit 170 prohibits the reply of the unlocking response code signal to the electric lock 200 for a predetermined time. Is determined (step S104). At this time, if the communication control unit 170 prohibits the reply of the unlocking response code signal to the electric lock 200 and determines that the predetermined time has not elapsed (“No” in step S104), the process is stepped. The process is returned to S101. Further, when the communication control unit 170 prohibits the reply of the unlocking response code signal to the electric lock 200 and determines that the predetermined time has elapsed (“Yes” in step S104), the communication control unit 170 Allows the reply of the unlocking response code signal (step S105), and the unlocking unit 190 cancels the invalidation of the authentication communication for unlocking with the electric lock 200. Further, the time count of the prohibition timer is cleared (step S106), and the process is returned to step S101.

FIG. 10 is a processing flow when the communication control unit 170 receives the LF signal in the LF reception unit 130.
When the communication control unit 170 determines that the LF signal has been received by the LF reception unit 130 (“Yes” in step S101), it determines whether or not the received LF signal is an unlocking challenge code signal. (Step S107). When the communication control unit 170 determines that the received LF signal is not the unlocking challenge code signal (“No” in step S107), the process shifts to step S112.

On the other hand, when the communication control unit 170 determines that the received LF signal is the unlocking challenge code signal (“Yes” in step S107), the unlocking response code signal is returned to the electric lock 200. It is determined whether or not it is prohibited (step S108). When the communication control unit 170 determines that the reply of the unlocking response code signal to the electric lock 200 is not prohibited (“No” in step S108), the unlocking response code is given to the electric lock 200. The signal is returned (step S109), and the process returns to step S101. When the communication control unit 170 determines that the reply of the unlocking response code signal to the electric lock 200 is prohibited (“Yes” in step S108), it is determined whether or not the prohibition timer has been set indefinitely. If the communication control unit 170 determines that the prohibition timer has not been set indefinitely (“No” in step S110), the communication control unit 170 restarts the prohibition timer for a predetermined time (step S111). When the communication control unit 170 detects that the authentication signal for unlocking from the electric lock 200 is received within the predetermined period, the communication control unit 170 is set to extend the predetermined period, and the process is set to step S101. return. In this process, since the unlocking LF has been transmitted even though the prohibition timer was set in step S116 described later, it is determined that there is a high possibility that the unlocking timer has been transmitted illegally, and the timer is extended. .. Further, when the communication control unit 170 determines that the prohibition timer has been set infinitely (“Yes” in step S110), the process returns to step S101.

When the communication control unit 170 determines in step S107 that the received LF signal is not the unlocking challenge code signal (“No” in step S107), is the received LF signal a locking challenge code signal? It is determined whether or not (step S112). When the communication control unit 170 determines that the received LF signal is not the lock challenge code signal (“No” in step S112), the process returns to step S101.

On the other hand, when the communication control unit 170 determines that the received LF signal is the lock challenge code signal (“Yes” in step S112), the lock response code signal is returned to the electric lock 200. (Step S113), and the reply of the unlocking response code is prohibited (step S114). As a result, the communication control unit 170 invalidates the authentication communication for unlocking with the electric lock 200 after the authentication communication for locking is completed with the electric lock 200. That is, even if the unlocking LF is illegally sent, the unlocking response signal is not sent, so that the unlocking cannot be performed. Therefore, it is possible to prevent unauthorized unlocking using the repeater. Then, the communication control unit 170 determines whether or not the prohibition timer has been set infinitely (step S115), and if it determines that the prohibition timer has not been set infinitely (“No” in step S115), it is predetermined. The time prohibition timer is started (step S116), and the process is returned to step S101. As a result, the invalidation of the authentication communication for unlocking described above will continue for a predetermined period. If the communication control unit 170 determines that the prohibition timer has been set infinitely (“Yes” in step S115), the process returns to step S101.

FIG. 11 is a processing flow when either the unlock switch 120 or the lock switch 110 is pressed in step S102.
When the communication control unit 170 determines that the LF reception unit 130 has not received the LF signal (“No” in step S101), and then determines that the lock switch 110 or the unlock switch 120 has been pressed (step). Next, in "Yes" of S102, it is determined whether or not the unlock switch 120 and the lock switch 110 are pressed at the same time (step S117). At this time, if the communication control unit 170 determines that the unlock switch 120 and the lock switch 110 are pressed at the same time (“Yes” in step S117), the process shifts to (4).

On the other hand, when the communication control unit 170 determines that the unlock switch 120 and the lock switch 110 are not pressed at the same time (“No” in step S117), the communication control unit 170 is unlocked by the user. It is determined whether or not the switch 120 has been operated (step S118). When the communication control unit 170 determines that the unlock switch 120 has been operated by the user (“Yes” in step S118), the unlock drive request is transmitted to the electric lock 200 (step S119). Further, the reply of the unlocking response code signal to the electric lock 200 is permitted (step S120), the count-up of the prohibition timer is cleared (step S121), and the process is returned to step S101. That is, the unlocking unit 190 cancels the invalidation of the authentication communication for unlocking.

When the communication control unit 170 determines that the unlock switch 120 has not been operated by the user (“No” in step S118), it is determined whether or not the lock switch 110 has been operated by the user (step S122). .. At this time, if the communication control unit 170 determines that the lock switch 110 has been operated by the user (“Yes” in step S122), the lock drive request is transmitted to the electric lock 200 (step S123). Further, the reply of the unlocking response code signal to the electric lock 200 is prohibited (step S124). As a result, the communication control unit 170 invalidates the authentication communication for unlocking with the electric lock 200 after the authentication communication for locking is completed with the electric lock 200. Next, it is determined whether or not the prohibition timer has been set infinitely (step S125), and if it is determined that the prohibition timer has not been set infinitely (“No” in step S125), the prohibition timer for a predetermined time is reset. It is started (step S126), and the process is returned to step S101. As a result, the invalidation of the authentication communication for unlocking described above will continue for a predetermined period. That is, even if the unlocking LF is illegally sent, the unlocking response signal is not sent, so that the unlocking cannot be performed. On the other hand, even when the communication control unit 170 determines that the lock switch 110 has not been operated by the user (“No” in step S122), the process is returned to step S101.

FIG. 12 is a processing flow when the unlocking switch 120 and the locking switch 110 are pressed at the same time and the user intentionally prohibits unlocking.
When the communication control unit 170 determines that the unlock switch 120 and the lock switch 110 are pressed at the same time (“Yes” in step S117), the simultaneous press timer is set to 3 seconds and activated (step S127). , The count of the simultaneous push timer is increased by "1" (step S128).

Next, the communication control unit 170 determines whether or not the simultaneous pressing of the unlock switch 120 and the lock switch 110 is released (step S129), and the communication control unit 170 simultaneously presses the unlock switch 120 and the lock switch 110. When it is determined that is released (“Yes” in step S129), it is determined again whether or not the unlock switch 120 and the lock switch 110 are pressed at the same time (step S130), and the unlock switch 120 is again determined. When it is determined that the lock switch 110 and the lock switch 110 are pressed at the same time (“Yes” in step S130), the process returns to step S127. Further, when the communication control unit 170 determines that the simultaneous pressing of the unlock switch 120 and the lock switch 110 has not been released (“No” in step S129), the unlock switch 120 and the lock switch 110 are again pressed. When it is determined that they are not pressed at the same time (“No” in step S130), the communication control unit 170 then determines whether or not the simultaneous pressing timer has elapsed for 3 seconds (step S131).

If it is determined in step S131 that the simultaneous push timer has not elapsed for 3 seconds (“No” in step S131), the process returns to step S129. On the other hand, when it is determined that the simultaneous pressing timer has elapsed for 3 seconds (“Yes” in step S131), the communication control unit 170 is simultaneously pressed for 3 seconds continuously after being pressed simultaneously for the first time. It is determined whether or not it has been done (step S132).

At this time, if it is determined that the communication control unit 170 is simultaneously pressed for 3 seconds continuously after being simultaneously pressed (“Yes” in step S132), the prohibition timer for a predetermined time is set infinitely. (Step S133), and the process returns to step S101. That is, unless the unlocking unit 190 cancels the invalidation of the authentication communication for unlocking, the variable unit 180 is predetermined so that the invalidation is not canceled by timing the elapse of the predetermined time by the timer 172. Set the period to infinity. On the other hand, when the communication control unit 170 determines that the simultaneous pressing has not been performed for 3 consecutive seconds since the first simultaneous pressing (“No” in step S132), the prohibition timer has been set infinitely. Whether or not it is determined (step S134). Then, when it is determined that the prohibition timer has been set infinitely (“Yes” in step S134), the process is returned to step S101, and when it is determined that the prohibition timer has not been set infinitely (“Yes” in step S134). In "No"), the prohibition timer is restarted (step S135) with the value obtained by adding the counter value of the switch simultaneous pressing counter multiplied by 2 minutes to the predetermined time as the setting time of the prohibition timer, and the process is stepped. Return to S101. That is, the variable portion 180 extends the predetermined period. In the present embodiment, the value to be added to the predetermined time is multiplied by the counter value of the switch simultaneous pressing counter and 2 minutes, but the present invention is not limited to this.

<Effect of this embodiment>
As described above, according to the present embodiment, the electronic key 100 includes a communication control unit 170 that controls wireless communication with the electric lock 200, and the communication control unit 170 is between the electric lock 200 and the electric lock 200. Then, after the authentication communication for locking is completed, the authentication communication for unlocking with the electric lock 200 is invalidated for a predetermined period. That is, in response to the lock challenge code signal from the electric lock 200, the electronic key 100 returns the lock response code signal, or the user operates the electronic key 100 to transmit the lock signal to transmit the electric lock. When the lock authentication communication is performed in the 200, the electronic key 100 invalidates the unlock communication for unlocking the electric lock 200 for a certain period of time.
Therefore, for example, there is a so-called relay attack in which the door is unlocked when returning home and the door can be unlocked from the outside immediately after locking, or the system is vulnerable and illegally unlocked using a repeater. It is possible to prevent crimes such as theft from occurring.
Further, since the function is restored after a predetermined time, the user does not feel inconvenience when using the electronic key 100 next time.
Further, since it is possible to respond by changing only the electronic key 100, it is not necessary to change the electric lock 200, and if only the electronic key 100 is changed, the electric lock 200 becomes an electric lock 200 that prevents fraudulent acts such as relay attack, and the cost is high. It is possible to improve the anti-theft performance by suppressing.

Further, according to the present embodiment, when the communication control unit 170 detects that the authentication signal for unlocking from the electric lock 200 is received within the predetermined period, the predetermined period is extended. And said.
Therefore, even under the situation where the unlocking challenge code signal is illegally sent to the electronic key 100, the electronic key 100 continues to invalidate the unlocking communication for unlocking the electric lock 200. Therefore, the security can be improved.

Further, according to the present embodiment, the user is provided with a variable portion for changing a predetermined period.
As a result, since the user can set the time for disabling the unlock authentication, it is possible to set it individually according to the convenience of the user, which is highly convenient.

Further, according to the present embodiment, the user is provided with a release unit for canceling the invalidation of the authentication communication for unlocking.
As a result, if necessary, the unlocking operation can be performed at the user's will, so that the convenience is not reduced.
In the embodiment, it is exemplified that the stop of the authentication communication can be released by pressing the unlock switch 120 of the electronic key 100. However, by diverting the existing switch in this way, the cost increase is suppressed. Then, the function can be enhanced.

By recording a program for executing each process of the present invention on a computer-readable recording medium, causing the computer system to read the program recorded on the recording medium, and executing the program, each of the electronic keys 100 is executed. The various processes described above may be performed. The "computer system" here may include hardware such as an OS and peripheral devices. Further, the "computer system" includes the homepage providing environment (or display environment) if the WWW system is used. The "computer-readable recording medium" includes flexible disks, magneto-optical disks, ROMs, writable non-volatile memories such as flash memories, portable media such as CD-ROMs, hard disks built into computer systems, and the like. Refers to the storage device of.

Further, the "computer-readable recording medium" is a volatile memory inside a computer system that serves as a server or client when a program is transmitted via a network such as the Internet or a communication line such as a telephone line (for example, DRAM (Dynamic)). It also includes those that hold the program for a certain period of time, such as Random Access Memory)). Further, the program may be transmitted from a computer system in which this program is stored in a storage device or the like to another computer system via a transmission medium or by a transmission wave in the transmission medium. Here, the "transmission medium" for transmitting a program refers to a medium having a function of transmitting information, such as a network (communication network) such as the Internet or a communication line (communication line) such as a telephone line. Further, the above program may be for realizing a part of the above-mentioned functions. Further, it may be a so-called difference file (difference program) that can realize the above-mentioned function in combination with a program already recorded in the computer system.

Although the embodiments and examples of the present invention have been described in detail with reference to the drawings, the specific configuration is not limited to the embodiments or the embodiments and does not deviate from the gist of the present invention. Design etc. are also included. For example, in the present embodiment, the door of the house has been illustrated as an example for the convenience of installing the electric lock, but also in the locking / unlocking system in which the electric lock according to the present embodiment is provided on the door of the vehicle. , The same effect can be expected.

100; Electronic key 110; Lock switch 120; Unlock switch 130; LF receiver 140; Receive antenna 150; UHF transmitter 160; Transmit antenna 170; Communication control unit 171; Memory 172; Timer 173; Variable unit 174; Release unit 200; Electric lock 201; Door 202; Operation lock 203; Door handle 210; LF transmitter 220; Transmit antenna 230; UHF receiver 240; Receiver antenna 250; Control unit 251; Timer 252; Memory 260; Door lock / unlock Lock unit 261; Lock / unlock detection unit 263; Lock mechanism 270; Start switch (operation unit)
280; Door open / close detector 290; Battery

Claims (4)

An electronic key that is possessed by the user and that communicates wirelessly with an electric lock that locks and unlocks the door.
A communication control unit for controlling the wireless communication with the electric lock is provided.
The communication control unit invalidates the authentication communication for unlocking with the electric lock for a predetermined period after the authentication communication for locking is completed with the electric lock .
An electronic key characterized in that when the communication control unit detects that an authentication signal for unlocking from the electric lock has been received within the predetermined period, the predetermined period is extended. User, the electronic key according to claim 1, characterized in that with a variable section for varying the predetermined time period. The electronic key according to claim 1 or 2 , wherein the user includes a release unit for releasing the invalidation of the authentication communication for unlocking. It is a communication control method in an electronic key that is possessed by the user and performs wireless communication with an electric lock that locks and unlocks the door.
After the communication control unit that controls the wireless communication with the electric lock completes the authentication communication for locking with the electric lock, the unlocking with the electric lock is performed for a predetermined period. When the communication control unit detects that the authentication signal for unlocking from the electric lock is received within the predetermined period, the authentication communication for the purpose is invalidated, and the predetermined period is extended. A communication control method characterized by.

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