TWI835526B - Offline combination lock system and operation method thereof - Google Patents

Abstract

An offline combination lock system and an operation method thereof are disclosed. The offline combination lock system includes a controller device, an offline combination lock, a cloud database and a user device. The controller device generates a key password and sends it to the offline combination lock for the binding process. The controller device, the offline combination lock and the key password are registered in the cloud database. The user device sends an unlock request to the controller device, and the controller device sends a one time password request to the cloud database. The cloud database sends back the access link of the one time password request and sends it to the user device. The user device requests the unlock password from the cloud database by the access link. The cloud database returns the unlock password to the user device for the unlocking process.

Description

Offline password lock system and its operation method

The present invention relates to an offline password lock system and its operating method, and in particular to an offline password lock system and its operating method that can remotely perform scheduling and authority control.

A combination lock is a lock that uses a combination of numbers, letters or symbols as the opening password. Traditional combination locks open the lock by moving the mechanism corresponding to the numbers or letters to the unlocking position, but mechanical combination locks are difficult to change and open. Passwords and fixed passwords are easy to be cracked. Most existing password locks use electronic password locks to replace traditional mechanical password locks.

Because electronic password locks have computing and memory functions, the password setting can be changed according to user needs, and there are also devices that can be connected to the Internet for remote control. However, electronic code locks that are controlled through the Internet are prone to network intrusion and leakage of passwords, causing security problems. If an offline electronic code lock is used, although it is more secure, it has problems in terms of control. Have greater difficulty. Administrators must be in the position of the electronic code lock to operate and change related settings. To meet the needs of different users or different usage periods, there is still considerable room for improvement in the operating efficiency and convenience of offline devices.

In view of this, the current offline combination lock is still inconvenient in operation and cannot effectively assist the operator in management and control. Therefore, the inventor of the present invention thought about and designed an offline password lock system and its operating method to improve the shortcomings of the existing technology and thereby enhance industrial implementation and utilization.

In view of the above-mentioned problems of the conventional technology, the purpose of the present invention is to provide an offline password lock system and its operation method, so as to solve the problem that the conventional offline password lock is still efficient and effective in operation, remote management, control and scheduling. Convenience issues.

According to one object of the present invention, an offline password lock system is proposed, which includes an administrator device, an offline password lock, a cloud database, and a user device. The manager device includes a password management module and a first communication module, and the password management module generates a key password. The offline password lock includes a password storage module and a transmission interface. The offline password lock receives the key password from the transmission interface and stores it in the password storage module. It is bound to the administrator's device through the key password. The cloud database includes a password registration module and a password generation module. The administrator device registers the administrator device, offline password lock and key password in the password registration module through the first communication module. The user device includes a second communication module, and the user device connects to the administrator device and the cloud database through the second communication module. The user device sends an unlocking request to the manager device through the second communication module. The manager device sends a one-time password (One Time Password, OTP) request to the cloud database through the first communication module, and the cloud database returns it once. The access link of the password request is sent to the user device. The user device requests the unlock password from the cloud database through the access link. The password generation module of the cloud database returns the unlock password to the user device for unlocking. program.

Preferably, the transmission interface can be a Bluetooth communication transmission interface or a near field communication transmission interface, and the administrator device is connected to the transmission interface of the offline password lock through the first communication module.

Preferably, the one-time password request may include a time limit for unlocking time, and the password generation module determines whether the access link is a valid link within the time limit.

Preferably, the administrator device can register the virtual fence of the offline password lock in the password registration module, and the password generation module determines whether the geographical location of the user device is within the range of the virtual fence.

Preferably, the offline password lock may include a password comparison module. The password comparison module receives the unlocking password and compares it with the key password to determine whether the unlocking password is correct.

Preferably, the user device can send the unlocking request to the administrator device through the communication application program, and receive the access link through the communication application program.

According to one object of the present invention, an operation mode of an offline password lock system is proposed, which includes the following steps: setting up an offline password lock system, and the offline password lock system includes an administrator device, an offline password lock, a cloud database, and a user device; The password management module of the administrator device generates a golden key password, transmits the golden key password to the offline password lock and stores it in the password management module, and binds the offline password lock to the administrator device through the golden key password; through the cloud database The password registration module registers the administrator device, offline password lock and key password; the user device sends an unlocking request to the administrator device; the administrator device sends a one-time password request to the cloud database, and the cloud database returns a one-time password The access link of the password request is sent to the user device; the user device requests the unlock password from the cloud database through the access link, and the cloud database returns the unlock password to the user device for the unlock process.

Preferably, the offline password lock can receive the key password through a transmission interface. The transmission interface is a Bluetooth communication transmission interface or a near field communication transmission interface. The administrator device is connected to the transmission interface of the offline password lock through the first communication module.

Preferably, the one-time password request may include a time limit for the unlocking time, and the cloud database uses the password generation module to determine whether the access link is a valid link within the time limit.

Preferably, the administrator device can register the virtual fence of the offline password lock in the password registration module, and the password generation module determines whether the geographical location of the user device is within the range of the virtual fence.

Preferably, the offline password lock may include a password comparison module. The password comparison module receives the unlocking password and compares it with the key password to determine whether the unlocking password is correct.

Preferably, the user device can send the unlocking request to the administrator device through the communication application program, and receive the access link through the communication application program.

Based on the above, according to the offline password lock system and its operating method of the present invention, it can have one or more of the following advantages:

(1) This offline password lock system and its operation method can bind the offline password lock to the administrator's device through the binding process, and register the device and password information in the cloud database, allowing users to connect to the cloud database To obtain the unlocking password, reduce the waste of device hardware and computing resources, and reduce system operating costs.

(2) This offline password lock system and its operating method can obtain the access link of the unlocking password by requesting a one-time password from the administrator device, so that the administrator device can effectively control the operation of the offline password lock and limit the operation time. Increase the efficiency and convenience of management and control.

(3) This offline password lock system and its operation method allow users to obtain a one-time unlocking password through an access link, and increase the device security of the offline password lock through different unlocking passwords.

10,20:Offline password lock system

11,21: Manager device

12,22:Offline password lock

13,23:Cloud database

14,24: User device

111: Password management module

112: First communication module

121:Password storage module

122:Transmission interface

123: Password comparison module

131: Password registration module

132:Password generation module

141: Second communication module

S01~S06, S10~S12, S20~S26: steps

In order to make the technical features, content and advantages of the present invention and the effects it can achieve more obvious, the present invention is described in detail as follows with the accompanying drawings and in the form of embodiments: Figure 1 is an embodiment of the present invention. Block diagram of offline password lock system.

Figure 2 is a flow chart of the operation mode of the offline password lock system according to the embodiment of the present invention.

Figure 3 is a schematic diagram of an offline password lock system according to an embodiment of the present invention.

Figure 4 is a binding flow chart of the operation mode of the offline password lock system according to the embodiment of the present invention.

Figure 5 is a password acquisition flow chart of the operation mode of the offline password lock system according to the embodiment of the present invention.

In order to facilitate understanding of the technical features, contents and advantages of the present invention as well as the effects it can achieve, the present invention is described in detail below in conjunction with the accompanying drawings and in the form of embodiments. The drawings used therein are only for their main purpose. They are for illustration and auxiliary description purposes, and may not represent the actual proportions and precise configurations after implementation of the present invention. Therefore, the proportions and configuration relationships of the attached drawings should not be interpreted to limit the scope of rights of the present invention in actual implementation. Description.

All terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms such as those defined in commonly used dictionaries should be construed to have meanings consistent with their meanings in the context of the relevant technology and the present invention, and are not to be construed as idealistic or excessive Formal meaning, unless expressly so defined herein.

Please refer to Figure 1, which is a block diagram of an offline combination lock system according to an embodiment of the present invention. As shown in the figure, the offline password lock system 10 includes an administrator device 11 , an offline password lock 12 , a cloud database 13 and a user device 14 . The manager device 11 is a management device for the offline password lock 12. The manager device 11 is used to schedule and control the permissions of the offline password lock 12. The manager device 11 can bind a specific management device when the offline password lock 12 is produced, or bind it through a binding program when the consumer purchases it. on consumer devices. The manager device 11 is an electronic device with computing and network transmission functions, such as a desktop computer, a notebook computer, a tablet computer or a smart phone and other fixed or portable electronic devices. The processor in the electronic device can perform control Instructs to access the program in the memory to run the application program of the password management module 111, and execute the first communication module 112 through communication and network transmission components. The first communication module 112 includes wireless communication network transmission and short-distance transmission. Communication network transmission. The password management module 111 can randomly generate a golden key password by the application program, and bind it to the offline password lock 12 through the golden key password.

The offline password lock 12 can be a password lock device with computing and storage functions, such as various locks, door locks or access control switches that are opened and locked by passwords. The offline password lock 12 is an offline independent individual mode and does not need to be connected to The network or server, but through the internal computing function, the lock can be unlocked by dynamically generated different passwords to prevent the static fixed password from being cracked and leaked and affecting the security of the password lock device. The offline password lock 12 includes a password storage module 121, a transmission interface 122 and a password comparison module 123. The password storage module 121 can store the key password of the offline password lock 12. When the user enters the unlocking password for the offline password lock 12 , the password comparison module 123 determines whether it is the correct unlocking password by comparing whether the unlocking password matches the golden key password, and then determines whether to open or unlock the locked state of the offline password lock 12 .

As mentioned above, the offline password lock 12 can be bound to the administrator device 11 during production or actual consumer use. The binding process mainly generates a key password by the password management module 111 of the administrator device 11. The key password is received through the transmission interface 122 of the offline password lock 12 through the first communication module 112, and the key password is stored in the password storage module 121 for binding. The offline password lock 12 is not connected to the network, but uses a short-distance transmission interface such as a Bluetooth communication transmission interface or a near field communication transmission interface. 122, can cooperate with the first communication module 112 in the administrator device 11 to perform short-distance communication network transmission, so that the offline password lock 12 can receive the key password for binding.

After the offline password lock 12 receives and stores the key password, the administrator device 11 further registers the data of the offline password lock 12 in the cloud database 13. The cloud database 13 is a computer device with computing and storage functions, such as a cloud server. The cloud database 13 includes a password registration module 131 and a password generation module 132. When the administrator device 11 is connected to the cloud database 13 through the first communication module 112, the administrator device 11, the offline password lock 12 and the key password can be uploaded to the cloud database 13 and stored in the password registration module 131 to record the offline password lock 12 and the corresponding bound administrator device 11. In addition, the administrator device 11 can set a virtual fence for the offline password lock 12 during registration, and store the usage scope of the offline password lock in the cloud database 13.

The user device 14 is an electronic device with computing and network transmission functions, such as a portable electronic device such as a laptop, a tablet, or a smartphone. The user device 14 includes a second communication module 141 . Group 141 includes wireless communication network transmission and short-range communication network transmission. The user device 14 connects the administrator device 11 and the cloud database 13 through the second communication module 141 . The user device 14 is an electronic device held by the unlocker. When the actual unlocker needs to operate the offline combination lock 12 at a predetermined time, the administrator device 11 must arrange the unlocking schedule and provide the user device 14 with the required information for the unlocking procedure. password. Specifically, the user device 14 first makes an unlocking request to the manager device 11, that is, transmits the unlocking request to the first communication module 112 of the manager device 11 through the second communication module 141. The communication modules here are two. Communication applications installed on the device, such as instant messaging applications such as Line and WhatApp, or text messaging applications on smartphones. When the administrator device 11 receives the unlocking request, it can send a one-time password request to the cloud database 13 through the first communication module 112 according to the schedule. The one-time password request here is not only included in the password registration module 131 Registered tube The manager device 11 and the offline password lock 12 for which the unlocking process is to be performed also include the effective operating time for operating the offline password lock 12. By limiting the unlocking time, the effective period during which different unlockers can open the offline password lock 12 is planned. For example, when a guest opens the hotel door, the offline code lock 12 on the door is only valid during the guest's stay. When the time limit is exceeded, the offline code lock 12 on the door cannot be opened.

In actual operation, the cloud database 13 returns the access link to the administrator device 11 based on the one-time password request received, and then transmits it to the user device 14 through the communication module, allowing the unlocker to obtain time-limited access. link. When the valid unlocking time is entered, the unlocker can obtain the access link from the user device 14 and connect to the cloud database 13 to request the unlock password. The password generation module 132 of the cloud database 13 determines the memory of the user device 14 . Check whether the link is a valid link within the time limit. If it is a valid link, the unlocking password is returned to the user device 14 so that the unlocker can use the unlocking password to perform the unlocking process. On the contrary, if the access link does not enter the valid time limit or exceeds the time limit, the cloud database 13 treats the link as an invalid link and does not return the unlocking password to the user device 14 . In another embodiment, in addition to determining the effective usage time, the cloud database 13 can also compare the geographical location of the user device 14 to determine whether it is within the set virtual fence. When both the time limit and the geographical location restriction comply with the settings, Only when the standard is met, the unlocking password can be returned to the user device 14.

Please refer to Figure 2, which is a flow chart of the operation method of the offline password lock system according to the embodiment of the present invention. As shown in the figure, the operation method of the offline password lock system includes the following steps (S01~S06):

Step S01: Set up an offline password lock system. The offline password lock system includes an administrator device, an offline password lock, a cloud database and a user device. First, an offline password lock system is set up. As described in the previous embodiment, the offline password lock system may include an administrator device, an offline password lock, a cloud database, and a user device. The administrator device includes a password management module and a first communication module. Group, offline password lock It includes a password storage module, a transmission interface and a password comparison module, the cloud database includes a password registration module and a password generation module, and the user device includes a second communication module.

Step S02: Generate a golden key password through the password management module of the administrator device, transmit the golden key password to the offline password lock and store it in the password management module, and bind the offline password lock to the administrator device through the golden key password. In the offline password lock system, the password management module of the administrator device can randomly generate a key password and send it to the offline password lock through a transmission interface, such as receiving the key password through Bluetooth communication transmission method or near field communication transmission method, and storing it. In the password management module. The key password generated by the administrator's device can include the administrator's device information. The password comparison module must use the key password to compare the subsequent unlocking password. That is, the offline password lock must provide a valid unlocking password through the administrator's device. The offline password lock is bound to the administrator device, and the administrator device schedules the unlocking time and manages the unlockers.

Step S03: Register the administrator device, offline password lock and key password through the password registration module of the cloud database. When the offline password lock is bound to the administrator device, the administrator device further registers the information of the offline password lock in the cloud database, that is, connects to the cloud database through the first communication module, and connects the administrator device and the offline password lock to the cloud database. And the key password is uploaded to the cloud database and stored in the password registration module to record the offline password lock and the corresponding bound administrator device.

Step S04: Send an unlocking request from the user device to the administrator device. When the unlocker needs to unlock the door, he or she can make an unlocking request to the manager's device. For example, if the warehouse staff needs to enter or exit the warehouse when loading or shipping goods, and the offline password lock of the warehouse door is opened, the warehouse manager can make an unlocking request to the manager. , transmit the unlocking request to the administrator device, allowing the administrator to arrange and control these unlocking requests.

Step S05: The administrator device sends a one-time password request to the cloud database, and the cloud database returns the access link of the one-time password request and sends it to the user device. When managers install After arranging each unlocking request, you can connect to the cloud database through the second communication module and send a one-time password request to the cloud database. The one-time password request includes the administrator device registered in the password registration module and the administrator device to be processed. The offline password lock of the unlocking program also includes the effective operating time for operating the offline password lock. The cloud database returns the access link to the administrator device based on the one-time password request received, and then transmits it to the user device through the first communication module, allowing the unlocker to obtain the time-limited access link.

Step S06: The user device requests an unlocking password from the cloud database through the access link, and the cloud database returns the unlocking password to the user device for the unlocking process. When the valid unlocking time is entered, the unlocker obtains the access link from the user device and connects to the cloud database to request the unlocking password. The password generation module of the cloud database determines whether the access link is valid within the time limit. The link, if it is a valid link, will return the unlocking password to the user's device, allowing the unlocker to use the unlocking password to perform the unlocking process. On the contrary, if the access link does not enter the valid time limit or exceeds the time limit, the cloud database will treat it as an invalid link and will not return the unlocking password to the user device. In another embodiment, in addition to determining the effective usage time, the cloud database can also compare the geographical location of the user's device to determine whether it is within the set virtual fence. When both the time limit and the geographical location restriction meet the set standards, The unlocking password is then sent back to the user device.

Please refer to Figure 3, which is a schematic diagram of the offline code lock system according to the embodiment of the present invention. Please refer to Figures 4 and 5 at the same time. Figure 4 is a binding diagram of the operation mode of the offline code lock system according to the embodiment of the present invention. The flow chart is defined, and Figure 5 is a password acquisition flow chart of the operation mode of the offline password lock system according to the embodiment of the present invention. In Figure 3, the offline password lock system 20 may include an administrator device 21, an offline password lock 22, a cloud database 23 and a user device 24. The administrator device 21 is a smart phone and includes a password management module and a first The communication module, the offline password lock 22 can be a password lock device with computing and storage functions, including a password storage module, a transmission interface and a password comparison module, and the cloud database 23 can be a password lock device with computing and storage functions. The cloud server with storage function includes a password registration module and a password generation module. The user device 24 can be a smart phone like the administrator device 21 and includes a second communication module. The offline combination lock system 20 is similar to the system described in the previous embodiment, and the same content will not be repeatedly described here.

In terms of system operation, the offline password lock system 20 can perform a binding process. Please also refer to Figure 4. The binding process in the operation mode of the offline password lock system 20 includes the following steps (S10~S12):

Step S10: Start the binding process. After the offline password lock system 20 is set up, device binding is first performed on the offline password lock 22 .

Step S11: Send the key password to the offline password lock and store it in the password management module. The smart phone of the administrator device 21 can install the application program of the password management module, generate the key password corresponding to the offline password lock 22 model through the application program, and transmit the offline password through the short-distance wireless communication network transmission module of the smart phone. Lock 22. Although the offline password lock 22 is not connected to the network, it can receive the key password through the transmission interface of Bluetooth communication transmission method or near field communication transmission method, and store it in the password management module.

Step S12: Register the administrator device, offline password lock and key password through the password registration module of the cloud database. After the offline password lock 22 stores the key password generated by the administrator device 21, the administrator device 21 connects to the cloud database 23 through the wireless communication network, and uploads data such as the administrator device serial number, the offline password lock serial number, and the key password to The password registration module records the binding relationship in the cloud database 23. When it is necessary to obtain the unlocking password, the password generation module of the cloud database 23 generates the corresponding unlocking password based on the information in the password registration module.

In terms of system operation, the offline password lock system 20 can perform a password acquisition process. Please also refer to Figure 5. The password acquisition process in the operation mode of the offline password lock system 20 includes the following steps (S20~S26):

Step S20: Start the password acquisition process. After the offline password lock 22 completes the binding with the administrator device 21, when the actual unlocker needs to obtain the unlock password, the password acquisition process will be started, that is, the unlock request will be sent to the administrator device through the smart phone of the user device 24. 21 smartphones. Messages between the user device 24 and the administrator device 21 can be transmitted through instant messaging software or text messages. The administrator device 21 does not need to be in a position close to the offline password lock 22 and can manage and control each offline password lock 22 remotely. .

Step S21: The administrator device sends a one-time password request to the cloud database. When the administrator device 21 receives the unlocking request, it connects to the cloud database 23 through the first communication module and makes a request for a one-time password to the cloud database. The one-time password request here may include the offline password lock to be opened. 22 serial number and the time limit of unlocking time, and the cloud database 23 records the offline password lock 22 serial number and time limit at the same time.

Step S22: The cloud database returns the access link of the one-time password request. The cloud database 23 compares the serial number of the offline password lock 22 with the authority of the administrator device 21 , generates an access link for the one-time password request, and sends the access link back to the administrator device 21 .

Step S23: The administrator device sends the access link to the user device. After receiving the access link, the administrator device 21 sends the access link to the user device 24 again through instant messaging software or text message.

Step S24: The user device requests the cloud database for the unlock password through the access link. The user device 24 receives the access link of the unlocking password, and within the set time limit, connects to the cloud database 23 through the access link, and accesses the password information in the cloud database 23 .

Step S25: The cloud database returns the unlocking password to the user device. When the cloud database 23 receives an access request, the password generation module determines whether the access is within the recorded time limit. If so, the password generation module generates an unlocking password through the key password, and transmits the one-time password back to the user device 24; on the other hand, if it is not within the limited time, the password generation module determines that the storage is invalid. Get the link and do not return the unlock password. In another embodiment, the cloud database 23 further compares whether the geographical location of the user device 24 is within the set virtual fence. If it is within the time limit and is within the virtual fence, the one-time password is returned. to the user device 24; correspondingly, if either the time limit or the geographical location limit is not met, the unlocking password will not be returned.

Step S26: The unlocker enters the unlocking password into the offline password lock to unlock. If the user device 24 receives the unlocking password, the actual unlocker can enter the unlocking password into the offline password lock 22 to perform the unlocking procedure; on the contrary, if the unlocking password is not received, the unlocker cannot obtain and enter the unlocking password. Setting the access time limit is mainly to schedule and control the offline password lock 22, so that the set personnel can obtain the password and open the offline password lock 22 within the arranged time. Since the unlock password is a one-time password, different time periods or different unlocks The unlocking passwords obtained by the users are different, which can effectively avoid security problems caused by password leakage.

The above is only illustrative and not restrictive. Any equivalent modifications or changes that do not depart from the spirit and scope of the present invention shall be included in the appended patent scope.

10:Offline password lock system

11:Manager device

12:Offline password lock

13:Cloud database

14:User device

111: Password management module

112: First communication module

121:Password storage module

122:Transmission interface

123: Password comparison module

131: Password registration module

132:Password generation module

141: Second communication module

Claims (12)

An offline password lock system, which includes: a manager device including a password management module and a first communication module, the password management module generates a key password; an offline password lock includes a password storage Module and a transmission interface, the offline password lock receives the key password from the transmission interface and stores it in the password storage module, and is bound to the administrator device through the key password; a cloud database includes a A password registration module and a password generation module, the administrator device registers the administrator device, the offline password lock and the key password in the password registration module through the first communication module; and a user device, The system includes a second communication module, and the user device connects the administrator device and the cloud database through the second communication module; wherein the user device sends an unlocking request to the cloud database through the second communication module. The administrator device sends a one-time password request to the cloud database through the first communication module, and the cloud database returns an access link of the one-time password request and sends it to the cloud database. The user device requests an unlocking password from the cloud database through the access link, and the password generation module of the cloud database returns the unlocking password to the user device to perform the unlocking process. The offline password lock system of claim 1, wherein the transmission interface is a Bluetooth communication transmission interface or a near field communication transmission interface, and the administrator device is connected to the transmission interface of the offline password lock through the first communication module. The offline password lock system as described in claim 1, wherein the one-time password request includes a time limit for unlocking time, and the password generation module determines the access connection Is the link a valid link within the time limit? The offline password lock system of claim 3, wherein the administrator device registers a virtual fence of the offline password lock in the password registration module, and the password generation module determines whether the geographical location of the user device is in the Within the scope of the virtual fence. The offline password lock system as described in claim 1, wherein the offline password lock includes a password comparison module. The password comparison module receives the unlocking password and compares it with the key password to determine whether the unlocking password is correct. The offline password lock system of claim 1, wherein the user device sends the unlocking request to the administrator device through a communication application, and receives the access link through the communication application. An operation method of an offline password lock system, which includes the following steps: setting up an offline password lock system. The offline password lock system includes an administrator device, an offline password lock, a cloud database and a user device; through the management A password management module of the user device generates a key password, transmits the key password to the offline password lock and stores it in a password management module, and binds the offline password lock to the administrator through the key password device; register the administrator device, the offline password lock and the key password through a password registration module of the cloud database; send an unlocking request from the user device to the administrator device; the administrator device The cloud database issues a one-time password request, and the cloud database returns an access link of the one-time password request and sends it to the user device; The user device requests an unlocking password from the cloud database through the access link, and the cloud database returns the unlocking password to the user device to perform the unlocking process. The operation method of the offline password lock system as described in claim 7, wherein the offline password lock receives the key password through a transmission interface, and the transmission interface is a Bluetooth communication transmission interface or a near field communication transmission interface, and the administrator device The transmission interface of the offline password lock is connected through a first communication module. The operation method of the offline password lock system as described in claim 7, wherein the one-time password request includes a time limit for unlocking time, and the cloud database determines whether the access link is within the time limit through a password generation module valid link. The operation mode of the offline password lock system as described in claim 9, wherein the administrator device registers a virtual fence of the offline password lock in the password registration module, and the password generation module determines the geographical location of the user device Whether it is within the range of the virtual fence. The operation mode of the offline password lock system as described in claim 7, wherein the offline password lock includes a password comparison module, and the password comparison module receives the unlocking password and compares it with the key password to determine the password. Is the unlocking password correct? The operation mode of the offline password lock system as described in claim 7, wherein the user device sends the unlocking request to the administrator device through a communication application, and receives the access link through the communication application.