Electronic lock device and locking / unlocking method

Abstract

To easily update information for authentication processing by an electronic lock device while maintaining security.SOLUTION: One aspect of the present disclosure is an electronic lock device which includes: an antenna unit that generates power from electromagnetic waves output from a mobile terminal device; a biometric information acquisition unit that is activated by using the power generated by the antenna unit and acquires biometric authentication information of a registered user of the mobile terminal device; a biometric authentication unit that is activated by using the power generated by the antenna unit and performs authentication based on the biometric information acquired by the biometric information acquisition unit; and a locking / unlocking signal output unit that, if biometric authentication by the biometric authentication unit is successful, supplies the power generated by the antenna unit to a locking / unlocking mechanism by outputting a locking signal or unlocking signal by using the power generated by the antenna unit.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to an electronic lock device and a locking / unlocking method. [Background technology]

[0002] Conventionally, electronic lock systems have been known in which an electronic key and an electronic lock communicate to control the locking and unlocking of a door. Conventional electronic lock systems, for example, authenticate the biometric information of registered users. In such electronic lock systems, a biometric authentication function is installed in an electronic lock device that is always powered by an outlet or a battery, and the door is often unlocked when the biometric authentication is successful.

[0003] For example, in the unlocking control system described in Patent Document 1, a mobile terminal communicates with a server device, and the mobile terminal transmits biometric information to the server device. The server device transmits key information to the mobile terminal by referring to a database in which the user's biometric information is linked to key information capable of unlocking an electronic lock. The mobile terminal transmits the key information received from the server device to an electronic lock with which it can communicate, thereby unlocking the electronic lock using a mobile terminal other than the specific mobile terminal.

[0004] In the lock and unlock management system described in Patent Document 2, a sensor unit of a specific area entrance / exit management device reads personal biometric information, and when an IC card is brought into contact with a predetermined position on the specific area entrance / exit management device, the personal biometric information is input from the specific area entrance / exit management device to the IC card. The IC card performs personal authentication by matching the personal biometric information input from the specific area entrance / exit management device with the personal biometric information stored in the IC card, and outputs the personal authentication result to the specific area entrance / exit management device, which opens the door if the personal authentication result is positive.

[0005] The personal identification system described in Patent Document 3 inputs and collates biometric information using a portable electronic device, and if there is a match, transmits the ID number to a personal identification terminal such as a door. If the ID number is registered, the personal identification terminal requests the portable electronic device to input personal information, collates the requested personal information, and unlocks the door only if there is a match. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2019-173306 A [Patent Document 2] JP 2004-353418 A [Patent Document 3] JP 2003-286781 A Summary of the Invention [Problem to be solved by the invention]

[0007] The technologies described in Patent Documents 1, 2, and 3 are based on the premise that power is constantly supplied to the electronic lock device. However, if the electronic lock device is suddenly unplugged, if the power supply is cut off due to a power outage, or if the battery level drops, the electronic lock may stop functioning. In this case, the biometric authentication function of the electronic lock device will not function, and the electronic lock cannot be unlocked.

[0008] The present disclosure has been made in consideration of the above circumstances, and aims to provide an electronic lock device and a locking / unlocking method that can perform authentication using biometric information without constantly supplying power to the electronic lock device. [Means for solving the problem]

[0009] The present disclosure has been made to solve the above-mentioned problems, and one aspect of the present disclosure is an electronic lock device comprising: an antenna unit that generates power from electromagnetic waves output from a mobile terminal device; a biometric information acquisition unit that is activated using the power generated by the antenna unit and acquires biometric authentication information of a registered user of the mobile terminal device; a biometric authentication unit that is activated using the power generated by the antenna unit and performs authentication based on the biometric information acquired by the biometric information acquisition unit; and a locking / unlocking signal output unit that, if biometric authentication by the biometric authentication unit is successful, causes the power generated by the antenna unit to be supplied to a locking / unlocking mechanism by outputting a locking signal or unlocking signal using the power generated by the antenna unit.

[0010] Another aspect of the present disclosure is a locking / unlocking method including the steps of: an antenna unit of an electronic locking device generating power from electromagnetic waves output from a mobile terminal device; a biometric information acquisition unit of the electronic locking device starting up using the power generated by the antenna unit and acquiring biometric authentication information of a registered user of the mobile terminal device; a biometric authentication unit of the electronic locking device starting up using the power generated by the antenna unit and performing authentication based on the biometric information acquired by the biometric information acquisition unit; and a locking / unlocking signal output unit of the electronic locking device, if biometric authentication is successful, supplying the power generated by the antenna unit to a locking / unlocking mechanism by outputting a locking signal or unlocking signal using the power generated by the antenna unit. Effect of the Invention

[0011] According to one aspect of the present invention, authentication using biometric information can be performed without constantly supplying power to an electronic lock device. [Brief description of the drawings]

[0012] [Figure 1] 1 is a schematic diagram showing an example of an electronic lock system 1 in an embodiment. [Diagram 2] 1 is a block diagram showing an example of the configuration of an electronic lock device 100 according to an embodiment. [Diagram 3]FIG. 2 is a diagram illustrating an example of a functional configuration of an IC chip 120 according to the embodiment. [Figure 4] 2 is a sequence diagram showing an example of the operation of the electronic lock system 1 in an embodiment. [Diagram 5] FIG. 13 is a block diagram showing a modified example of the mobile terminal device in the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] An electronic lock device and a locking / unlocking method to which the present invention is applied will be described below with reference to the drawings. The electronic lock system of the embodiment described below is an example to which the electronic lock device is applied. In the electronic lock system, for example, a registered person of an accommodation facility locks and unlocks an electronic lock installed on a door of a room. The object to be locked and unlocked by the electronic lock system of the embodiment is a door of an accommodation facility, but is not limited to this, and it may be anything that temporarily grants the authority to lock and unlock lockers, rental spaces, entrance and exit gates of office buildings, doors of rental cars, etc., as long as the electronic key is used to lock and unlock the electronic lock.

[0014] (Electronic lock system configuration) 1 is a schematic diagram showing an example of an electronic lock system 1 according to an embodiment. The electronic lock system includes, for example, an electronic lock device 100 and a mobile terminal device 200. The electronic lock device 100 locks and unlocks the door 10, thereby permitting and prohibiting the opening and closing of the door 10 using the doorknob 20. The mobile terminal device 200 is, for example, an information processing device such as a smartphone held by a user.

[0015] The mobile terminal device 200 is installed with, for example, locking / unlocking application software. The mobile terminal device 200 includes, for example, an NFC (near field communication) communication circuit 202, a user interface unit 204, a display unit 206, a processing unit 208, and a storage unit 210. The NFC communication circuit 202 transmits electromagnetic waves corresponding to NFC and receives electromagnetic waves corresponding to NFC. The user interface unit 204 includes, for example, an operation input mechanism such as a touch panel, and a voice input / output mechanism. The display unit 206 is, for example, a liquid crystal display. The processing unit 208 is a processor that performs various processes by executing the locking / unlocking application software. The processing unit 208 controls the NFC communication circuit 202, the user interface unit 204, the display unit 206, and the storage unit 210 according to the locking / unlocking application software based on the operation accepted by the user interface unit 204.

[0016] The storage unit 210 is realized by, for example, a flash memory or an EEPROM (Electrically Erasable Programmable Read Only Memory). The storage unit 210 stores locking / unlocking information, which is information for performing at least one of locking and unlocking. The locking / unlocking information may be written to the storage unit 210 by, for example, a reader / writer device managed by an administrator of a facility including the door 10, or may be written to the storage unit 210 via the Internet or the like from a server device managed by the administrator. The locking / unlocking information includes an electronic lock ID, a registrant ID, and device authentication information. The electronic lock ID is information that uniquely identifies the electronic lock device 100. The registrant ID is information that uniquely identifies the registrant. The device authentication information is, for example, information generated based on an encryption key corresponding to the registrant. The device authentication information is, for example, information obtained by encrypting the electronic lock ID or the registrant ID with the encryption key of the registrant, but is not limited thereto, and the device authentication information may be information necessary for device authentication processing, such as a password.

[0017] FIG. 2 is a block diagram showing an example of the configuration of the electronic lock device 100 according to the embodiment. The electronic lock device 100 of the embodiment does not have a function of connecting to a server device, a power source, or a battery, for example. Such an electronic lock device 100 that is not connected to a server device is called, for example, an offline electronic lock. Also, an electronic lock device 100 that does not have a power source is called a battery-less electronic lock. The electronic lock device 100 of the embodiment will be described as an example applied to an offline electronic lock or a battery-less electronic lock, but is not limited thereto. The electronic lock device 100 includes, for example, an antenna unit 110, an IC chip 120, a rectifier circuit 130, a control microcomputer 140, a locking / unlocking mechanism 150 (locking / unlocking mechanism), and a biometric information acquisition unit 160. In the present embodiment, the locking / unlocking mechanism 150 may perform both a locking operation and an unlocking operation, but is not limited thereto, and may perform only an unlocking operation.

[0018] The antenna unit 110 generates power by electromagnetic waves output from the mobile terminal device 200 (electronic device). Specifically, the antenna unit 110 generates power by receiving electromagnetic waves compatible with NFC from the mobile terminal device 200. The transmission method of the electromagnetic waves compatible with NFC is, for example, a radio wave method (microwave method), but may be an electromagnetic induction method. When the electromagnetic waves for NFC communication are in the UHF band or 2.45 GHz band, the electromagnetic waves may be transmitted and received by a radio wave method (microwave method), and when the electromagnetic waves for NFC communication are in a low frequency of 13.56 MHz or less, the electromagnetic waves may be transmitted and received by an electromagnetic induction method. The antenna unit 110 outputs an electric signal corresponding to the electromagnetic waves received from the mobile terminal device 200 to the IC chip 120.

[0019] The IC chip 120 performs a predetermined decoding process on the electric signal corresponding to the electromagnetic waves to obtain the lock / unlock information transmitted from the mobile terminal device 200. The IC chip 120 performs a predetermined process to output the lock / unlock signal to the control microcomputer 140. The lock / unlock signal may also be referred to as a lock signal or an unlock signal.

[0020] The rectifier circuit 130 generates DC power by rectifying an electric signal corresponding to the electromagnetic waves. The rectifier circuit 130 supplies the DC power to the control microcomputer 140, the locking / unlocking mechanism 150, and the biometric information acquisition unit 160. When a locking / unlocking signal is supplied from the IC chip 120, the control microcomputer 140 outputs a drive signal to the locking / unlocking mechanism 150. The locking / unlocking mechanism 150 moves the tip of the deadbolt 152 toward the strike 22 of the door 10 in accordance with the drive signal. The locking / unlocking mechanism 150 may include an actuator such as a solenoid and a motor, for example, and the locking / unlocking mechanism 150 may include a cylinder that generates a drive force, such as a hydraulic cylinder, a pneumatic cylinder, or a hydraulic cylinder, or may include an artificial muscle (soft actuator) using a polymer.

[0021] Regarding locking, the door 10 may be automatically locked when closed by a latch mechanism (such as a spring) of the locking / unlocking mechanism 150 (auto-lock). In this case, the locking / unlocking mechanism 150 compresses a spring provided on a bar (rod-shaped member) of the latch when unlocking. When the locking / unlocking mechanism 150 is stopped, the latch is automatically locked by the restoring force of the spring. However, the spring is only an example, and rubber or other elastic bodies may be used. The bar of the latch may be a cylindrical part (such as a cylinder) that contains a fluid such as gas or liquid. In addition, in reality, the invention is not limited to these examples, and an auto-lock method that does not use electricity for locking may be used. At this time, the electronic lock device 100 can maintain the unlocked state by constantly receiving electromagnetic waves corresponding to NFC. However, a mechanism (such as a lock and a stopper) that can maintain the unlocked state after unlocking and release the unlocked state when locking may be provided.

[0022] The biometric information acquisition unit 160 is activated by using power generated by the antenna unit 110, and acquires biometric authentication information of a registered user of the mobile terminal device 200. The biometric information acquisition unit 160 includes, for example, a fingerprint sensor 162 and a lighting unit 164. When a fingerprint of a user's finger is pressed against the reading surface, information corresponding to the fingerprint is acquired. The fingerprint sensor 162 may be a capacitance type sensor or an optical sensor. Note that the fingerprint sensor 162 is an example of a biometric information sensor, and the biometric information acquisition unit 160 may acquire other biometric information such as a face, an iris, or a voiceprint. The lighting unit 164 lights up the fingerprint reading surface under the control of the IC chip 120. The biometric information acquisition unit 160 is activated by being supplied with DC power based on electromagnetic waves from the mobile terminal device 200. When reading biometric authentication information, the biometric information acquisition unit 160 prompts the user to press his / her finger against the reading surface by lighting up the fingerprint reading surface with the lighting unit 164. The fingerprint sensor 162 outputs a sensor signal obtained by reading the user's fingerprint to the IC chip 120 .

[0023] When such an electronic lock device 100 receives electromagnetic waves output from the NFC communication circuit 202 via the antenna unit 110, power is supplied to the rectifier circuit 130, the control microcomputer 140, the locking / unlocking mechanism 150, and the biometric information acquisition unit 160, and the IC chip 120 is activated.

[0024] FIG. 3 is a diagram showing an example of a functional configuration of the IC chip 120 in the embodiment. The IC chip 120 includes, for example, an acquisition unit 122, a device authentication unit 124, a biometric authentication unit 126, a storage unit 128, and a lock / unlock signal output unit 129. The acquisition unit 122 acquires a communication signal via the antenna unit 110. The acquisition unit 122 also acquires biometric information from the biometric information acquisition unit 160. The device authentication unit 124 is started using power generated by the antenna unit 110, and performs device authentication based on the device authentication information acquired by the acquisition unit 122. The biometric authentication unit 126 performs biometric authentication based on the biometric information acquired by the acquisition unit 122. The storage unit 128 stores an electronic lock ID fixed to the door 10, device authentication information, a registered user ID, and registered user biometric authentication information. The registered user biometric authentication information is information to be compared with biometric authentication information indicating the characteristics of the biometric information acquired by the biometric information acquisition unit 160. The registered user biometric authentication information is registered in advance in the electronic lock device 100 as the biometric authentication information of the registered user who uses the door 10. The lock / unlock signal output unit 129 locks or unlocks the door when the information authentication by the device authentication unit 124 is successful and the biometric authentication by the biometric authentication unit 126 is successful.

[0025] In the embodiment, both device authentication and biometric authentication are performed, but device authentication may not be performed. In this case, when biometric authentication by biometric authentication unit 126 is successful, lock / unlock signal output unit 129 outputs a lock signal or unlock signal using the power generated by antenna unit 110, thereby supplying the power generated by antenna unit 110 to lock / unlock mechanism 150.

[0026] The biometric information acquiring unit 160 may acquire the biometric information when the device authentication by the device authentication unit 124 is successful. At this time, when the device authentication by the device authentication unit 124 is successful, the biometric information acquiring unit 160 drives the lighting unit 164 to acquire the biometric information by the fingerprint sensor 162. Furthermore, when the biometric authentication by the biometric authentication unit 126 is successful, the locking / unlocking signal output unit 129 may supply the power generated by the antenna unit 110 to the locking / unlocking mechanism 150.

[0027] (Operation sequence of electronic lock system 1) FIG. 4 is a sequence diagram showing an example of the operation of the electronic lock system 1 in the embodiment. When the mobile terminal device 200 is held up near the antenna unit 110 of the electronic lock device 100, the NFC communication circuit 202 transmits electromagnetic waves S10 corresponding to NFC near the door 10 to the electronic lock device 100 (step ST10). The electronic lock device 100 receives the electromagnetic waves S10, starts up, supplies power to each unit of the electronic lock device 100, and transitions to a standby state (step ST20).

[0028] The NFC communication circuit 202 transmits a lock / unlock command S12 including the electronic lock ID, registered user ID, and device authentication information stored in the storage unit 210 to the electronic lock device 100 (step ST12). The electronic lock device 100 receives the lock / unlock command S12 (step ST22), and the IC chip 120 checks the electronic lock ID included in the lock / unlock command S12 (step ST24). The IC chip 120 compares the electronic lock ID included in the lock / unlock information with the electronic lock ID stored in the storage unit 128, and if they match, determines that the electronic lock ID included in the lock / unlock command S12 is correct (step ST26). If the received electronic lock ID is incorrect (step ST26: NO), the IC chip 120 proceeds to step ST52. In step ST52, the electronic lock device 100 generates a failure response to lock or unlock, and transmits the generated failure response S14 to the mobile terminal device 200 (step ST50). The NFC communication circuit 202 receives the failure response S14 from the electronic lock device 100 (step ST14).

[0029] If the received electronic lock ID is correct (step ST26: YES), the IC chip 120 checks the device authentication information included in the lock / unlock command S12 (step ST28). The device authentication unit 124 determines that the device authentication has been successful when the device authentication information stored in the storage unit 128 matches the device authentication information included in the lock / unlock command S12 (step ST30: YES). If the device authentication information stored in the storage unit 128 does not match the device authentication information included in the lock / unlock command S12, the device authentication unit 124 determines that the device authentication has failed (step ST30: NO), and proceeds to step ST52.

[0030] In response to the success of the device authentication, the IC chip 120 checks the registrant ID included in the lock / unlock command S12 (step ST32). If the registrant ID included in the lock / unlock command S12 does not exist in the memory unit 128 (step ST34: NO), the IC chip 120 proceeds to step ST52.

[0031] When the registered user ID included in the lock / unlock command S12 exists in the storage unit 128 (step ST34: YES), the IC chip 120 activates the biometric information acquisition unit 160 to drive the lighting unit 164 and waits for input of biometric information (step ST36). When the biometric information is not input from the biometric information acquisition unit 160 within a predetermined period (step ST36: NO), the IC chip 120 proceeds to the process of step ST52. When the biometric information is input from the biometric information acquisition unit 160 within a predetermined period (step ST36: YES), the IC chip 120 extracts characteristic information from the biometric information to generate biometric authentication information (step S40). The IC chip 120 compares the generated biometric authentication information with the biometric authentication information stored in the storage unit 128 (step ST42) and determines whether the biometric authentication has been successful or not (step ST44). When the two pieces of biometric authentication information do not match, the IC chip 120 determines that the biometric authentication has failed (step ST44: NO), and proceeds to the process of step ST52.

[0032] If both pieces of biometric authentication information match, the IC chip 120 determines that the biometric authentication has been successful (step ST44: YES) and transmits a lock / unlock signal to the control microcomputer 140, which then operates the lock / unlock mechanism 150 to perform the locking or unlocking operation (step ST46). The IC chip 120 generates a success response to the locking or unlocking operation (step S48) and transmits the generated success response S14 to the mobile terminal device 200 (step ST50). The NFC communication circuit 202 receives the success response S14 from the electronic lock device 100 (step ST14).

[0033] (Modification) FIG. 5 is a block diagram showing a modified example of the mobile terminal device according to the embodiment. The portable terminal device 200A of the modified example can lock or unlock a plurality of electronic lock devices 100. For this purpose, the portable terminal device 200A has a function of storing a plurality of lock / unlock information (1), (2), ... in the storage unit 210A and selecting any one of the plurality of lock / unlock information. The plurality of lock / unlock information is, for example, lock / unlock information of a plurality of electronic lock devices 100 corresponding to different doors such as the front door of a house, a garage door, a locker at a company (or school), and a locker at a sports club. When the portable terminal device 200A is held up to the electronic lock device 100, it acquires an electronic lock ID from the electronic lock device 100 and transmits a lock / unlock command to the electronic lock device 100 using the lock / unlock information corresponding to the acquired electronic lock ID. This allows the portable terminal device 200A to smoothly lock or unlock a plurality of electronic lock devices 100.

[0034] (Effects of the embodiment) As described above, the electronic lock device 100 of the embodiment can be started up using the power generated by the antenna unit 110, acquire biometric authentication information of a registered user of the mobile terminal device 200, start up using the power generated by the antenna unit 110, perform authentication based on the biometric authentication information, and if the biometric authentication is successful, output a locking signal or an unlocking signal using the power generated by the antenna unit 110. As a result, the electronic lock device 100 can perform authentication using biometric information without constantly supplying power to the electronic lock device 100. In other words, the electronic lock device 100 can realize a battery-less electronic lock with a biometric authentication function that is not connected to a server device or the like.

[0035] In addition, the electronic lock with biometric authentication function can be installed on the door 10 without the need for power supply work or server device connection work, which simplifies the installation work of the electronic lock and reduces costs.

[0036] Moreover, according to the electronic lock device 100 of the embodiment, the device authentication information is acquired from the mobile terminal device 200, device authentication is performed based on the device authentication information, and if the device authentication and biometric authentication are successful, a locking signal or an unlocking signal can be output. As a result, according to the electronic lock device 100, by using both the device authentication information and the biometric information stored in the mobile terminal device 200, the identity can be reliably confirmed and the door can be locked or unlocked. Furthermore, since the identity can be confirmed by the successful biometric authentication, even if the mobile terminal device 200 is dropped and picked up by a third party or is stolen, the device authentication may be successful but the biometric authentication may fail, so that the door 10 can be prevented from being unlocked. If a registered person belongs to a company and leaves the company, even if the deletion of the biometric authentication information from the electronic lock device 100 of the locker is delayed and the person is able to go to the locker, if the application software for locking / unlocking the mobile terminal device 200 is erased during the resignation process, the device authentication will fail before the biometric authentication is performed, so that the locker can be prevented from being unlocked.

[0037] Furthermore, according to the electronic lock device 100, biometric information is acquired if device authentication is successful, so there is no need to acquire biometric information if device authentication is unsuccessful, thereby preventing the acquisition of a registered user's personal information when device authentication is unsuccessful.

[0038] Furthermore, according to the electronic lock device 100, if the device authentication is successful, the lighting unit 164 is driven to obtain biometric information using the fingerprint sensor 162, so that the device authentication can be performed first and then the biometric authentication can be performed, allowing the authentication of the registered user to be carried out smoothly.

[0039] Furthermore, according to the electronic lock device 100, when the device authentication is successful, it is determined whether or not the registrant ID acquired from the mobile terminal device 200 matches the stored registrant ID, and when both registrant IDs match, the biometric information is acquired, so that the biometric information can be acquired on the condition that the device authentication is successful and the match of the registrant IDs is confirmed. In this way, the electronic lock device 100 can prevent the acquisition of the registrant's personal information even if the registrant ID cannot be confirmed.

[0040] Although each embodiment and variant example has been described, these are merely examples and are not intended to be limiting. For example, any of the embodiments or variant examples, or a part of each embodiment or a part of each variant example, may be combined with one or more other embodiments or one or more other variant examples to realize one aspect of the present invention. [Explanation of symbols]

[0041] 1...electronic lock system, 10...door, 20...doorknob, 22...strike, 100...electronic lock device, 110...antenna section, 120...IC chip, 122...acquisition section, 124...device authentication section, 126...biometric authentication section, 128...storage section, 129...unlocking signal output section, 130...rectifier circuit, 140...control microcomputer, 150...unlocking mechanism, 152...deadbolt, 160...biometric information acquisition section, 162...fingerprint sensor, 164...lighting section, 200, 200A...portable terminal device, 202...NFC communication circuit, 204...user interface section, 206...display section, 208...processing section, 210, 210A...storage section

Claims

1. an antenna unit that generates power using electromagnetic waves output from a mobile terminal device; a biometric information acquisition unit that is activated using the power generated by the antenna unit and acquires biometric authentication information of a registered user of the mobile terminal device; a biometric authentication unit that is activated using the power generated by the antenna unit and performs authentication based on the biometric information acquired by the biometric information acquisition unit; a locking / unlocking signal output unit that outputs a locking signal or an unlocking signal using the power generated by the antenna unit when the biometric authentication by the biometric authentication unit is successful, thereby supplying the power generated by the antenna unit to a locking / unlocking mechanism; An electronic lock device comprising:

2. The antenna unit acquires device authentication information from the mobile terminal device, a device authentication unit that performs device authentication based on device authentication information acquired from the mobile terminal device; the lock / unlock signal output unit outputs a lock signal or an unlock signal when the device authentication unit has successfully performed device authentication and the biometric authentication unit has successfully performed biometric authentication. The electronic lock device according to claim 1.

3. The electronic lock device according to claim 2 , wherein the biometric information acquisition unit acquires the biometric information when the device authentication unit has succeeded in device authentication.

4. The electronic lock device according to claim 3 , wherein the biometric information acquisition unit activates a lighting unit and acquires the biometric authentication information by a biometric information sensor when device authentication by the device authentication unit is successful.

5. The antenna unit acquires a registrant ID from the mobile terminal device, when the device authentication by the device authentication unit is successful, the device authentication unit determines whether or not a registrant ID acquired from the mobile terminal device matches a stored registrant ID; the biometric information acquisition unit acquires the biometric information when both registrant IDs match. The electronic lock device according to claim 3.

6. a step of an antenna unit of the electronic lock device generating power by electromagnetic waves output from the mobile terminal device; A biometric information acquisition unit of the electronic lock device is started up using the power generated by the antenna unit, and acquires biometric authentication information of a registered user of the mobile terminal device; A biometric authentication unit of the electronic lock device is started up using the power generated by the antenna unit, and performs authentication based on the biometric information acquired by the biometric information acquisition unit; a step in which a lock / unlock signal output unit of the electronic lock device outputs a lock signal or an unlock signal using the power generated by the antenna unit when the biometric authentication is successful, thereby supplying the power generated by the antenna unit to a lock / unlock mechanism; A locking / unlocking method comprising:

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