Electric lock system, locking / unlocking method, and locking / unlocking program

Abstract

To provide an electric lock system, a locking / unlocking method, and a locking / unlocking program which are capable of locking / unlocking when a mobile terminal is in an area close to the electric lock.SOLUTION: An electric lock system includes: a mobile terminal that stores a one-time key with usage restrictions set; an electric lock installed at a gateway of a building; a terminal detection unit that detects that the mobile terminal is in the vicinity of the electric lock; and an authentication unit that authenticates the one-time key obtained from the mobile terminal and outputs permission to lock / unlock the electric lock.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to an electric lock system, a locking / unlocking method, and a locking / unlocking program. [Background technology]

[0002] 2. Description of the Related Art There is known an electric lock device that unlocks a door by wireless communication with a mobile terminal that stores an authentication key (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2019-56243 A Summary of the Invention [Problem to be solved by the invention]

[0004] If the authentication key is a one-time key, there is a security problem in that if wireless communication with an electric lock device is possible, the mobile terminal can lock and unlock the door no matter where it is.

[0005] The present disclosure has been made in consideration of the above-mentioned circumstances, and aims to provide an electric lock system, a locking / unlocking method, and a locking / unlocking program that can lock and unlock an electric lock when a mobile terminal is in an area close to the electric lock. [Means for solving the problem]

[0006] One aspect of the present disclosure is an electric lock system that includes a mobile terminal that stores a one-time key with usage restrictions set, an electric lock installed at an entrance to a building, a terminal detection unit that detects that the mobile terminal is in an area near the electric lock, and an authentication unit that authenticates the one-time key obtained from the mobile terminal and outputs permission to lock and unlock the electric lock. [Brief description of the drawings]

[0007] [Figure 1] 1 is a block diagram showing the overall configuration of an electric lock system. [Diagram 2] FIG. 2 is a schematic diagram showing the mechanism on the outside of the electric lock. [Diagram 3] FIG. 11 is a first communication sequence diagram showing the operation of the electric lock system. [Figure 4] FIG. 1 is a first schematic diagram showing the operation of the electronic lock system. [Diagram 5] FIG. 2 is a second schematic diagram showing the operation of the electronic lock system. [Figure 6] FIG. 3 is a third schematic diagram showing the operation of the electronic lock system. [Figure 7] FIG. 4 is a fourth schematic diagram showing the operation of the electronic lock system. [Figure 8] FIG. 5 is a fifth schematic diagram showing the operation of the electronic lock system. [Figure 9] FIG. 6 is a sixth schematic diagram showing the operation of the electronic lock system. [Figure 10] FIG. 7 is a seventh schematic diagram showing the operation of the electric lock system. [Figure 11] FIG. 8 is an eighth schematic diagram showing the operation of the electronic lock system. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] 1, the electric lock system A according to this embodiment includes as its components an electric lock 1, a relay device 2, a gateway 3, a router 4, a resident mobile terminal 5, a server 6, and a guest mobile terminal 7. Of the components of the electric lock system A, the electric lock 1, the relay device 2, the gateway 3, and the router 4 are building facilities fixed within a building B.

[0009] Of the electric lock 1, relay device 2, gateway 3, and router 4, the gateway 3 and router 4 constitute an indoor network C as shown in the figure. The indoor network C is connected to the electric lock 1 so as to be able to communicate with each other via the relay device 2. The resident mobile terminal 5 and the guest mobile terminal 7 are communication terminals that can be carried by users, and can be moved freely to the outside or inside of building B.

[0010] The electric lock 1 is installed on the front door D (entrance) of a building B such as a general residence. As shown in FIG. 2, the electric lock 1 is equipped with a handle 1a, a keyhole 1b, and an operation unit 1c as a mechanism on the outside of the building B. The handle 1a is a member that a user holds when opening or closing the front door D. The keyhole 1b is a hole for inserting a mechanical (physical) key. The operation unit 1c is a numeric keypad or simple buttons through which the user inputs operation instructions.

[0011] The electric lock 1 mechanically locks and unlocks the front door D based on a mechanical key that the user inserts into the keyhole 1b. The electric lock 1 is capable of short-range communication with the relay device 2, the resident mobile terminal 5, and the guest mobile terminal 7. The short-range communication between the electric lock 1 and the relay device 2, the guest mobile terminal 7, and the resident mobile terminal 5 is wireless communication based on so-called "Bluetooth (registered trademark)".

[0012] The electric lock 1 performs Bluetooth communication in accordance with the Bluetooth communication protocol with the relay device 2, the resident mobile terminal 5, and the guest mobile terminal 7. In addition to mechanically locking and unlocking the front door D based on the key inserted in the keyhole 1b, the electric lock 1 performs electrically locking and unlocking of the front door D based on operation instructions received by the operation unit 1c and Bluetooth communication with the resident mobile terminal 5 and the guest mobile terminal 7.

[0013] In addition to "Bluetooth (registered trademark)", several other short-range communication methods (communication standards) are generally known, such as "ZigBee (registered trademark)". In this embodiment, "Bluetooth (registered trademark)" is used as the short-range communication method, but other short-range communication methods may be used to construct the electric lock system A as necessary.

[0014] The electric lock 1 acquires a one-time key from the guest mobile terminal 7 by performing Bluetooth communication with the guest mobile terminal 7. The one-time key is an encryption key (digital code) required to lock and unlock the electric lock 1, and allows the electric lock 1 to be locked and unlocked under certain usage restrictions. The electric lock 1 transmits the one-time key to the relay device 2 using Bluetooth communication. Hereinafter, the one-time key will be referred to as a guest key.

[0015] The Bluetooth communication between the electric lock 1 and the guest mobile terminal 7 indicates that the guest E carrying the guest mobile terminal 7 has come into the vicinity of the electric lock 1. The electric lock 1 notifies the relay device 2 of the Bluetooth communication with the guest mobile terminal 7, that is, that the guest E has come into the vicinity of the electric lock 1, using Bluetooth communication.

[0016] When a locking / unlocking operation occurs, the electric lock 1 notifies the server 6 of the locking / unlocking operation via the relay device 2 and the indoor network C, etc. The electric lock 1 also notifies the server 6 of its own locking / unlocking state via the relay device 2 and the indoor network C, etc., and also notifies the resident mobile terminal 5 via the server 6.

[0017] The relay device 2 is installed near the front door D in the building B. The relay device 2 is a communication device that relays communication between the electric lock 1 and the indoor network C, and connects the electric lock 1 and the gateway 3 so that they can communicate freely. The relay device 2 performs Bluetooth communication (wireless communication) with the electric lock 1, and performs communication with the gateway 3 using a communication method (communication standard) that has a longer communication distance than Bluetooth communication.

[0018] The relay device 2 detects, based on Bluetooth communication between the electric lock 1 and the guest mobile terminal 7, that the guest mobile terminal 7 is in the vicinity of the electric lock 1 and that the guest E carrying the guest mobile terminal 7 has come into the vicinity of the electric lock 1. The relay device 2 corresponds to a terminal detection unit in this disclosure.

[0019] The communication method (indoor communication method) between the relay device 2 and the gateway 3 (indoor network C) is the communication method of the indoor network C, and is, for example, wireless communication such as a wireless LAN (Local Area Network) or a wired LAN. The relay device 2 performs communication (indoor communication) with the gateway 3 in accordance with the indoor communication method.

[0020] For example, when the relay device 2 receives the locked / unlocked status of the front door D from the electric lock 1 via Bluetooth communication, it transfers the locked / unlocked status of the front door D to the gateway 3 via indoor communication conforming to the indoor communication method.

[0021] The gateway 3 is a communication device that relays data to the Internet (public network), which is a well-known computer network. The gateway 3 performs indoor communication with the relay device 2 in accordance with an indoor communication method. The gateway 3 performs wired LAN communication with the router 4 in accordance with, for example, a wired LAN.

[0022] For example, when the gateway 3 receives the locked / unlocked state of the electric lock 1 from the relay device 2 or the operating state from the building equipment through the above-mentioned communication method, it outputs the operating state information to the router 4 through wired LAN communication. When the gateway 3 receives a confirmation request for the operating state of the building equipment from the router 4, it outputs the confirmation request to the relay device 2 and the building equipment through the above-mentioned communication method.

[0023] The router 4 is a communication device (connection device) that connects the gateway 3 to the Internet (public network) provided outside the building. The router 4 performs wired LAN communication with the gateway 3 in compliance with the LAN communication protocol. The router 4 performs communication with the server 6 (Internet communication) in compliance with the Internet communication protocol.

[0024] When the router 4 receives building equipment operation status information, such as the locked / unlocked state of the electric lock 1, from the gateway 3 via wired LAN communication, it transmits the operation status information to the server 6 via Internet communication. When the router 4 receives a building equipment operation status confirmation request from the server 6 via Internet communication, it outputs the confirmation request to the gateway 3 via wired LAN communication.

[0025] The resident mobile terminal 5 is a mobile communication device carried by a resident of building B, and is capable of wireless communication with the guest mobile terminal 7 via the Internet (public network) and a server 6. The resident mobile terminal 5 is pre-loaded with a dedicated application program (electric lock control app) for remotely locking and unlocking the electric lock 1.

[0026] The resident of building B locks and unlocks the electric lock 1 through short-range communication by operating the electric lock control app installed in the resident mobile terminal 5. The resident of building B operates the electric lock control app to instruct the server 6 to send an authorization message for locking and unlocking the electric lock 1 to the guest mobile terminal 7.

[0027] For example, if a resident of building B cannot return to building B for some reason, he or she will ask guest E to run an errand in building B. Guest E needs to enter building B to complete the errand requested by the resident of building B. When asking guest E to run an errand in building B, the resident of building B instructs the server 6 from the resident mobile terminal 5 to send an authorization message with a guest key (one-time key) attached to the guest mobile terminal 7.

[0028] The server 6 is a computer with a communication function provided on the Internet. The server 6 remotely controls the locking and unlocking of the electric lock 1 based on a pre-installed locking and unlocking program. The server 6 relays wireless communications between the resident mobile terminal 5 and the indoor network C and between the resident mobile terminal 5 and the guest mobile terminal 7. More specifically, the server 6 is connected to the router 4 of the indoor network C, the guest mobile terminal 7, and the resident mobile terminal 5 so as to be able to communicate freely over the Internet.

[0029] When the server 6 receives an authorization instruction from the resident mobile terminal 5, it generates an authorization message based on the authorization and transmits it to the guest mobile terminal 7 via Internet communication. The authorization message is a message that includes a specific guest key required for locking and unlocking the electric lock 1 and specific usage restrictions, and may be, for example, various types of e-mail and various types of short messages.

[0030] When the server 6 receives a lock / unlock request accompanied by a guest key from the electric lock 1 via the relay device 2 and the indoor network C, it performs validation (authentication) of the guest key. If the guest key is valid, the server 6 generates a one-time password corresponding to the guest key and transmits it to the guest mobile terminal 7 via Internet communication.

[0031] When the guest E operates the electric lock 1 and a one-time password is input from the electric lock 1 via the relay device 2 and the indoor network C, the server 6 performs validity verification (authentication) of the one-time password. If the one-time password is valid, the server 6 transmits locking / unlocking permission (locking permission or unlocking permission) to the guest mobile terminal 7 using Internet communication.

[0032] The server 6 authenticates the one-time password generated corresponding to the guest key in addition to the locking / unlocking request from the guest mobile terminal 7 using the guest key, and based on the authentication, outputs locking / unlocking permission to the guest mobile terminal 7. The server 6 is an authentication unit that authenticates the guest key (one-time key) acquired from the guest mobile terminal 7 (mobile terminal) and the one-time password corresponding to the guest key.

[0033] The guest mobile terminal 7 is a mobile communication device carried by a guest E who visits the building B. The guest mobile terminal 7 is communicatively connected to the server 6 via the Internet. The guest mobile terminal 7 is communicatively connected to the resident mobile terminal 5 via the Internet and the server 6.

[0034] A guest E who possesses a guest mobile terminal 7 does not originally have the authority to lock or unlock the electric lock 1. The guest mobile terminal 7 receives an authority grant message from the server 6 based on an authority grant instruction from the resident mobile terminal 5, and the guest E acquires the authority to lock or unlock the electric lock 1.

[0035] The guest mobile terminal 7 is capable of short-distance communication such as Bluetooth communication with the electric lock 1. When the guest E acquires the authority to lock and unlock the electric lock 1, the guest E locks and unlocks the electric lock 1 through Bluetooth communication between the guest mobile terminal 7 and the electric lock 1 and by inputting operation instructions to the operation unit 1c of the electric lock 1. The guest mobile terminal 7 is a mobile terminal of the present disclosure that stores a one-time key in advance.

[0036] The operation of the electric lock system A according to this embodiment, that is, the locking / unlocking method and program for the electric lock 1 will be described with reference to the communication sequence diagram of FIG.

[0037] When locking or unlocking the electric lock 1 using the electric lock system A, the resident of building B and guest E make advance contact using the resident mobile terminal 5 and guest mobile terminal 7. In advance contact, when the resident of building B asks guest E to run an errand, the resident of building B notifies guest E that he or she will be granted the authority to lock or unlock the electric lock 1 using a guest key (one-time key). There are no particular limitations on the communication tool used for advance contact, and for example, telephone, email, or various message tools can be used.

[0038] Once the resident of building B has completed the advance contact, he or she launches the electric lock control app on the resident mobile terminal 5 and sets usage restrictions for the guest key (step S1). The usage restrictions are, for example, the usage period and number of times the guest key can be used, as shown in Figs. 4 to 7. The usage period is set by the usage start date and time and usage end date and time, as shown in Fig. 4. The number of times the guest key can be used is set by selecting from several usage limits, as shown in Fig. 5.

[0039] After setting the usage period and number of times the guest key is used, the resident of building B sets the destination of the guest key. The destination of the guest key is set as an email address of the guest mobile terminal 7, for example, as shown in Fig. 6. After setting the destination of the guest key, the resident of building B sends an authorization instruction to the server 6 by pressing the send button displayed on the guest mobile terminal 7.

[0040] The issuance of authorization instructions is saved in the electric lock control application (resident mobile terminal 5) as an issuance history, as shown in Fig. 7. By checking the issuance history, the resident of building B can easily confirm what usage restrictions have been imposed on the server 6 to issue guest keys in the past.

[0041] When the server 6 receives the authorization instruction from the resident mobile terminal 5, the server 6 stores the authorization instruction in association with the resident of building B. The server 6 transmits an authorization message with the guest key and usage restrictions attached to it as an email or a short message to the guest mobile terminal 7. When the guest mobile terminal 7 receives the authorization message, the guest E causes the guest mobile terminal 7 to display the authorization message (step S2).

[0042] The guest E confirms the usage restrictions (usage conditions) for locking and unlocking the electric lock 1 with the guest key by displaying the authorization message on the guest mobile terminal 7. The guest key display screen displays how to lock and unlock the electric lock 1 with the guest key, for example, as shown in Fig. 8.

[0043] When guest E confirms the authorization message, he / she transmits the guest key to the electric lock 1 using Bluetooth communication. When guest E has completed transmitting the guest key to the electric lock 1, guest E operates the buttons on the electric lock 1 (step S3). The button operation is to input a lock / unlock request to the electric lock 1 using the guest key. The button operation (lock / unlock request) is input to the electric lock 1 by pressing a touch button provided on the operation unit 1c of the electric lock 1, for example, as shown in FIG. 9.

[0044] 2, a locking / unlocking request accompanied by a guest key is transmitted from the electric lock 1 to the server 6 via the relay device 2 and the indoor network C. By receiving the locking / unlocking request accompanied by the guest key from the electric lock 1, the relay device 2 detects that the guest E carrying the guest mobile terminal 7 has come into the vicinity of the electric lock 1.

[0045] When the server 6 receives the locking / unlocking request, it verifies the validity of the guest key accompanying the locking / unlocking request (step S4). The server 6 verifies the validity of the guest key accompanying the locking / unlocking request by comparing the previously stored authorization instruction with the guest key received from the electric lock 1.

[0046] If the server 6 determines that the guest key obtained from the electric lock 1 is valid as a result of the guest key validity verification, it generates a one-time password corresponding to the guest key (step S5). The server 6 transmits the one-time password to the guest mobile terminal 7 using Internet communication. The one-time password is transmitted to the guest mobile terminal 7 as an email or a short message, similar to the authorization message.

[0047] If the server 6 verifies the validity of the guest key and the guest key acquired from the electric lock 1 does not match the usage restrictions of the authorization instruction stored earlier, the server 6 rejects the lock / unlock request. The server 6 transmits a notification of the refusal of the lock / unlock request to the guest mobile terminal 7 via Internet communication.

[0048] The server 6 rejects the lock / unlock request if the guest key acquired from the electric lock 1 does not satisfy the usage period, which is one of the usage restrictions. The server 6 rejects the lock / unlock request if the guest key acquired from the electric lock 1 does not satisfy the usage count, which is the other of the usage restrictions.

[0049] When the guest mobile terminal 7 receives the one-time password, the guest E inputs the password to the electronic lock 1 (step S6). For example, as shown in Fig. 10, the guest E inputs the one-time password acquired from the server 6 on the screen of the guest mobile terminal 7, and transmits the one-time password to the electronic lock 1 using Bluetooth communication.

[0050] The one-time password is transmitted to the server 6 via the electric lock 1, the relay device 2, and the indoor network C. Note that the one-time password may be transmitted directly from the guest mobile terminal 7 to the server 6 using Internet communication, instead of being transmitted to the server 6 via the electric lock 1, the relay device 2, and the indoor network C.

[0051] When the server 6 receives the one-time password, it verifies the validity of the one-time password (step S7). The server 6 verifies the validity of the one-time password obtained from the guest mobile terminal 7 by comparing the one-time password stored at the time of generation with the one-time password obtained from the guest mobile terminal 7 via the electronic lock 1.

[0052] If the server 6 determines that the one-time password obtained from the electric lock 1 is valid as a result of the one-time password validity verification, it transmits locking / unlocking permission to the guest mobile terminal 7 via Internet communication. The locking / unlocking permission is transmitted to the guest mobile terminal 7 as an email or a short message, similar to the authorization message and the one-time password.

[0053] When the guest mobile terminal 7 receives the lock / unlock permission, the guest E causes the lock / unlock permission screen to be displayed (step S8). The lock / unlock permission screen includes an "unlock" button and a "lock" button, for example, as shown in FIG. 11. The guest E goes to the front door D according to the lock / unlock permission screen, and operates the "unlock" button or the "lock" button to transmit the lock / unlock operation to the electric lock 1 using Bluetooth communication. The electric lock 1 locks / unlocks the door by receiving the lock / unlock operation from the guest mobile terminal 7 (step S9).

[0054] In addition, the locking and unlocking operations may not be provided to the electric lock 1 via Bluetooth communication between the guest mobile terminal 7 and the electric lock 1, but may be provided from the sending guest mobile terminal 7 to the server 6 using Internet communication, and then supplied from the server 6 to the electric lock 1 via the indoor network C and the relay device 2.

[0055] When the electric lock 1 locks or unlocks the door based on the lock / unlock permission, it transmits a lock / unlock notification to the server 6 via the relay device 2 and the indoor network C. When the server 6 receives the lock / unlock notification from the electric lock 1, it ends the process related to the authorization instruction previously received from the resident mobile terminal 5.

[0056] The electric lock system A includes a relay device 2 (terminal detection unit) that detects that a guest mobile terminal 7 (mobile terminal) is in the vicinity of the electric lock 1, and a usage restriction is set for a guest key (one-time key) that is pre-stored in the guest mobile terminal 7 (mobile terminal). According to the electric lock system A, when the guest mobile terminal 7 is in the vicinity of the electric lock 1, the electric lock 1 can be locked and unlocked with higher security.

[0057] The electric lock system A includes a relay device 2 that detects that a guest mobile terminal 7 is in the vicinity of the electric lock 1, and an authentication unit that authenticates the guest key and the one-time password corresponding to the guest key input from the guest mobile terminal 7. According to the electric lock system A, when the guest mobile terminal 7 is in the vicinity of the electric lock 1, the electric lock 1 can be locked and unlocked with higher security.

[0058] The present disclosure is not limited to the above-described embodiment, and various modifications are possible. (1) In the above embodiment, the relay device 2 detects that the guest mobile terminal 7 is in the vicinity of the electric lock 1 and that the guest E has entered the vicinity of the electric lock 1 based on the button operation of the electric lock 1, but the present disclosure is not limited to this. It may be possible to detect that the guest E has entered the vicinity of the electric lock 1 based on other means instead of the button operation of the electric lock 1, for example, based on Bluetooth between the electric lock 1 and the guest mobile terminal 7.

[0059] When using the operation unit 1c of the electric lock 1, the guest E may enter a number string known only to the guest E to detect that the guest E has come into the vicinity of the electric lock 1. As other means, instead of operating the operation unit 1c, possible means include detecting the position of the guest mobile terminal 7 using a GPS (Global Positioning System) or the like, reading a one-dimensional or two-dimensional code with a reading device additionally provided in the electric lock 1, an image authentication device or a voice authentication device additionally provided in the electric lock 1, etc.

[0060] (2) In the above embodiment, the relay device 2 is the terminal detection unit, but the present disclosure is not limited to this. For example, the electric lock 1, the indoor network C, or the server 6 may be the terminal detection unit.

[0061] (3) In the above embodiment, the button operation of the electric lock 1 is used as a trigger for transmitting the lock / unlock request to the server 6 (authentication unit), but the present disclosure is not limited to this. For example, the lock / unlock request may be transmitted to the electric lock 1 via Bluetooth communication (short-distance communication) between the guest mobile terminal 7 and the electric lock 1, and the lock / unlock request may be transmitted from the electric lock 1 to the server 6 via the relay device 2 and the indoor network C.

[0062] (4) In the above embodiment, the server 6 is the authentication unit, but the present disclosure is not limited to this. For example, the indoor network C may be the authentication unit instead of the server 6. When the indoor network C is the authentication unit, the server 6 transmits an authorization message to the guest mobile terminal 7, to which a guest key (one-time key) is attached, and then transmits the guest key held by the server 6 to the router 4.

[0063] The guest key of the server 6 is transferred from the router 4 in the indoor network C to the relay device 2 via the gateway 3 and stored therein. The relay device 2 compares the guest key of the server 6 with the guest key acquired from the electric lock 1, and issues a lock / unlock permission to the guest mobile terminal 7.

[0064] (5) In the above embodiment, the usage of the one-time key is restricted to both the period during which the electric lock 1 can be locked and the number of times the electric lock 1 can be locked and unlocked, but the present disclosure is not limited to this. For example, the usage of the one-time key may be restricted to either the period during which the electric lock 1 can be locked and unlocked or the number of times the electric lock 1 can be locked and unlocked.

[0065] (6) In the above embodiment, unlocking of the electric lock 1 installed on the front door D (the entrance of the building B) has been described, but the present disclosure is not limited thereto. The present disclosure is also applicable to an electric lock installed on a door other than the entrance of the building B. [Explanation of symbols]

[0066] A...electric lock system, B...building, C...indoor network, D...front door, E...guest, 1...electric lock, 2...relay device, 3...gateway, 4...router, 5...resident mobile terminal, 6...server, 7...guest mobile terminal

Claims

1. A mobile terminal that stores a one-time key with a usage restriction set thereon; An electric lock is installed at the entrance of the building; A terminal detection unit that detects that the mobile terminal is in a vicinity of the electric lock; an authentication unit that authenticates the one-time key acquired from the mobile terminal and outputs permission to lock and unlock the electric lock; An electric lock system comprising:

2. A mobile terminal that stores a one-time key; An electric lock is installed at the entrance of the building; A terminal detection unit that detects that the mobile terminal is in a vicinity of the electric lock; an authentication unit that authenticates the one-time key and a one-time password corresponding to the one-time key acquired from the mobile terminal and outputs permission to lock and unlock the electric lock; An electric lock system comprising:

3. The electric lock system according to claim 1 , wherein the usage restriction is one or both of a period during which the electric lock can be locked and unlocked and a number of times the electric lock can be locked and unlocked.

4. The electronic lock system according to claim 1 or 2, wherein the mobile terminal obtains the one-time key by using an email or a short message.

5. The electric lock system according to claim 1 or 2, wherein the terminal detection unit detects the presence of the mobile terminal in the nearby area by short-range communication with the mobile terminal.

6. The electric lock system according to claim 1 or 2, wherein the terminal detection unit detects that the mobile terminal is present in the nearby area by an operation on the electric lock.

7. A locking / unlocking method for authenticating an electric lock when a locking / unlocking request using a one-time key with usage restrictions set thereon is received from an area near the electric lock and outputting permission to lock / unlock the electric lock.

8. A locking / unlocking method in which, when a locking / unlocking request using a one-time key is received from an area near an electric lock, a one-time password corresponding to the one-time key is generated and transmitted to a mobile terminal, the one-time password received from the mobile terminal is authenticated, and permission to lock / unlock the electric lock is output.

9. A locking / unlocking program installed in a computer that controls the locking / unlocking of an electric lock, When a locking / unlocking request using a one-time key with usage restrictions set is received from an area near the electric lock, the locking / unlocking program authenticates the one-time key and outputs permission to lock / unlock the electric lock.

10. A locking / unlocking program installed in a computer that controls the locking / unlocking of an electric lock, A locking / unlocking program that, when a locking / unlocking request using a one-time key is received from an area near an electric lock, generates a one-time password corresponding to the one-time key, transmits it to a mobile terminal, authenticates the one-time password received from the mobile terminal, and outputs permission to lock / unlock the electric lock.

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