KR102222857B1 - System and method for access control using blockchain network and computer program for the same - Google Patents

Abstract

An access control system includes: a photographing unit installed in a collective facility and configured to photograph an image of one or more access paths to the collective facility; a manipulation unit installed in the collective facility and configured to receive a user input related to at least one of opening and closing of a blocking facility installed in the at least one access path; a communication unit configured to communicate with the blockchain network maintained by a plurality of nodes; and a control unit configured to control the photographing unit and the communication unit to generate access event information in response to the user input received from the operation unit, and store the access event information and an access image corresponding to the occurrence time of the access event and captured by the photographing unit using the blockchain network. According to the access control system, access records for collective facilities, such as buildings, can be stored in the form of a smart contract on the blockchain network, thereby preventing forgery of access records and enabling easy reading.

Description

Access control system and method using a blockchain network, and a computer program therefor {SYSTEM AND METHOD FOR ACCESS CONTROL USING BLOCKCHAIN NETWORK AND COMPUTER PROGRAM FOR THE SAME}

The embodiments relate to an access control system and method, and a computer program therefor. More specifically, the embodiments are based on a technology that prevents forgery and falsification of access records and enables easy access by storing access records for collective facilities such as buildings in the form of a smart contract on a blockchain network. For.

In most companies with a lot of information that needs to be secured, such as trade secrets, in most cases, a door control system is installed and used to control the access of outsiders to the facility or to manage the access of users. Visitors to the facility are allowed to enter the facility only when they have a pre-issued access card, enter a preset password, or verify based on biometric authentication such as fingerprints. This confirmation is sometimes required at every entry. In addition, CCTV can be installed at the entrance of the facility to check the person entering the facility through video.

However, even when strict restrictions on access to buildings or facilities are in place, the access records of the door control system are stored in the device of the door control system itself or in one server inside the connected company and managed in a centralized manner. It is common to be. In this case, as a malicious user accesses the access record, the user's access information may be easily exposed, and the reliability of the record is liable to be damaged, such as forgery or alteration of the access record by the outside.

For example, in the prior art, Patent Publication No. 10-1445599 discloses an apparatus and method for automatically issuing a face recognition type smart paper access card. However, since the system of Registration Patent Publication No. 10-1445599 is configured to centralize and store the access records generated using the pass in the central building management server, there is a risk that the access records may be forged or altered by hacking into the central building management server. There is a limitation in that access records cannot be permanently preserved due to the problem of storage capacity or period.

Registered Patent Publication No. 10-1445599

According to an aspect of the present invention, by storing access records for collective facilities such as buildings in the form of smart contracts on a blockchain network, forgery of access records by malicious users is prevented and access records are stored. It is possible to provide an access control system and method for easy access and a computer program for this.

An access control system according to an embodiment includes: a photographing unit installed in an aggregate facility and configured to capture an image of one or more access routes to the aggregate facility; An operation unit installed in the collective facility and configured to receive a user input related to one or more of opening and closing of the blocking facility installed in the one or more access paths; A communication unit configured to communicate with a blockchain network maintained by a plurality of nodes; And generating access event information corresponding to the user input received from the control unit, and corresponding to the access event information and the time point of occurrence of the access event, and recording the access image captured by the photographing unit using the blockchain network. And a control unit configured to control the photographing unit and the communication unit to store.

In one embodiment, the control unit generates a hash value of the access event information, and transfers the access event information to a data block on the blockchain network in the form of a smart contract including the hash value. And uploading the access video to the data block on the sidechain linked to the block chain network in association with the access event information.

The access control system according to an embodiment further includes a sensor unit installed in the assembly facility and configured to detect the presence or location of a person in the assembly facility. In this case, the control unit defines an access event generated when a person is detected by the sensor unit and an access event generated when a person is not detected by the sensor unit as different types of smart contracts. It is further configured to upload to a block of data on the chain network.

In one embodiment, the operation unit is further configured to receive user identification information of a user requesting the opening or closing of the blocking facility. At this time, the smart contract corresponding to the access event information is, by subtracting a token managed by the blockchain network from the user's electronic wallet address corresponding to the user identification information, or the token to the user's electronic payment address. It is defined as a contract to deposit.

In one embodiment, the communication unit is further configured to transmit one-time authentication information to a user device corresponding to the user identification information by using the user identification information received on the operation unit, and the operation unit is configured to transmit the one-time authentication information from the user. It is further configured to receive information.

An access control method according to an embodiment includes the steps of, by an access control system installed in an aggregate facility, taking an image of one or more access routes to the aggregate facility; Receiving, by the access control system, a user input associated with at least one of opening and closing of blocking facilities installed in the at least one access path; Generating, by the access control system, access event information corresponding to the user input; And storing, by the access control system, the access event information and an access image photographed corresponding to the occurrence time of the access event on a blockchain network maintained by a plurality of nodes.

In one embodiment, the storing on the blockchain network includes: generating, by the access control system, a hash value of the access event information; Uploading, by the access control system, the access event information in the form of a smart contract including the hash value to a data block on the blockchain network; And uploading, by the access control system, the access image to a data block on a sidechain linked with the block chain network in association with the access event information.

The access control method according to an embodiment further includes, before the step of receiving the user input, detecting, by the access control system, the presence or absence of a person in the collective facility by one or more sensors installed in the collective facility. Includes. In this case, the uploading of the data block on the blockchain network includes an access event generated when a person is detected by the at least one sensor and a state in which a person is not detected by the at least one sensor by the access control system. And defining the access events generated in each other as different types of smart contracts and uploading them to a data block on the blockchain network.

In one embodiment, the step of receiving the user input includes the step of receiving, by the access control system, user identification information of a user requesting the opening or closing of the blocking facility. In addition, the smart contract corresponding to the access event information deducts a token managed by the blockchain network from the user's electronic wallet address corresponding to the user identification information or deposits the token into the user's electronic wallet address. It is defined as a contract.

In one embodiment, the receiving of the user input includes: transmitting, by the access control system, one-off authentication information to a user device corresponding to the user identification information; And receiving, by the access control system, the disposable authentication information from a user.

A computer program according to an embodiment is for executing the access control method according to the above-described embodiments by being combined with hardware, and may be stored in a computer-readable medium.

According to the access control system and method according to an aspect of the present invention, since management records for buildings, etc. are recorded in the form of a smart contract on a blockchain network, semi-permanent storage of access records is possible, It is possible to prevent a malicious user from falsifying the access record, and has the advantage of being able to easily read the access record when necessary.

In addition, in the access control system and method according to an aspect of the present invention, by uploading the video record such as CCTV at the time of the access event to the side chain of the blockchain network, it is limited according to the size of the data block on the main blockchain network. While it is possible to store the access video without receiving, it is possible to solve the problem that the CCTV video is lost after a limited storage period as in the prior art.

Furthermore, according to the access control system and method according to an aspect of the present invention, when the access record is stored, the user's identification information is included in the access record through communication with the user terminal, such as coronavirus infection (COVID-19). There is an advantage that an access control system and method can be used for creating a visitor list to prevent the spread of diseases.

1 is a conceptual diagram illustrating an exemplary form in which an access control system according to an embodiment is applied to a building.
2 is a schematic block diagram of an access control system according to an embodiment.
3 is a flowchart illustrating each step of an access control method according to an exemplary embodiment.
4 is a flowchart illustrating each step of a process of storing access event information in a blockchain network in an access control method according to an exemplary embodiment.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings.

1 is a conceptual diagram illustrating an exemplary form in which an access control system according to an embodiment is applied to a building.

Referring to FIG. 1, the access control system according to the present embodiment may include a photographing unit 10, an operation unit 20, and a management server 3 including a communication unit and a control unit. The photographing unit 10 is installed in the assembly facility 1 and serves to photograph an image of an access route to the assembly facility 1. The operation unit 20 is a device that is operated by a user entering the collective facility 1 to open or close a blocking facility for access to the collective facility 1, for example, the operation unit 20 is a keypad or fingerprint recognition of an entrance door. It may refer to a locking device equipped with a sensor.

In one embodiment, the communication unit and the control unit may be implemented in the management server 3 configured to communicate with the photographing unit 10 and the operation unit 20. The communication unit is a part for communicating with the blockchain network 2 composed of a plurality of nodes 200. In addition, the control unit generates access event information corresponding to the person’s access to the access facility 1 and controls the communication unit, so that the access event information and the captured image of the photographing unit 10 at the time of access are displayed on the blockchain network 2 This is the part for uploading to the data block.

For the above operation, the management server 3 is configured to be communicatively connected with the photographing unit 10, the operation unit 20, and the blockchain network 2 through a wired and/or wireless network. In addition, the management server 3 may be communicatively connected with one or more sensors 4 installed in the collective facility 1. The communication method between the management server 3 and the photographing unit 10, the operation unit 20, the one or more sensors 4 and/or the blockchain network 2 is that the object and the object are networked through a wired and/or wireless network. It may include all possible communication methods, and is not limited to wired communication, wireless communication, 3G, 4G, or other methods.

For example, a wired and/or wireless network between the management server 3 and the photographing unit 10, the operation unit 20, the one or more sensors 4 and the blockchain network 2 is a local area network (LAN), MAN (Metropolitan Area Network), GSM (Global System for Mobile Network), EDGE (Enhanced Data GSM Environment), HSDPA (High Speed Downlink Packet Access), W-CDMA (Wideband Code Division Multiple Access), CDMA (Code Division Multiple Access) ), Time Division Multiple Access (TDMA), Bluetooth, Zigbee, Wi-Fi, Voice over Internet Protocol (VoIP), LTE Advanced, IEEE802.16m, WirelessMAN-Advanced, HSPA+, 3GPP Long Term Evolution (LTE), Mobile WiMAX (IEEE 802.16e), UMB (formerly EV-DO Rev. C), Flash-OFDM, iBurst and MBWA (IEEE 802.20) systems, HIPERMAN, Beam-Division Multiple Access (BDMA) , Wi-MAX (World Interoperability for Microwave Access), and may refer to a communication network using one or more communication methods selected from the group consisting of ultrasonic communication, but is not limited thereto.

2 is a schematic block diagram of an access control system according to an embodiment. For convenience of explanation, the configuration of the access control system according to the present embodiment will be described with reference to FIGS. 1 and 2.

The access control system 100 according to the present embodiment includes a photographing unit 10, an operation unit 20, a communication unit 30, and a control unit 50. In one embodiment, the access control system 100 further includes a sensor unit 40. In addition, in one embodiment, the access control system 100 further includes an authentication unit (70). Furthermore, in one embodiment, the access control system 100 further includes a database (DB) 60. Some or all of the above-described units may be implemented in the management server.

The access control system 100 according to the embodiments and each unit (10, 20, 30, 40, 50, 60, 70) included therein are entirely hardware, or partially hardware and partially software. Can have sides. For example, the access control system 100 and each unit (10, 20, 30, 40, 50, 60, 70) included therein are hardware for processing data of a specific format and content or/or sending and receiving data in an electronic communication method. And software related thereto. In this specification, terms such as "unit", "module", "device", "terminal", "server" or "system" are intended to refer to a combination of hardware and software driven by the hardware. For example, the hardware may be a data processing device including a CPU or other processor. In addition, software driven by hardware may refer to an executing process, an object, an executable file, a thread of execution, a program, and the like.

In addition, each element constituting the access control system 100 is not necessarily intended to refer to separate devices that are physically separated from each other. That is, each unit of the access control system 100 shown in FIG. 2, in particular, the communication unit 30, the sensor unit 40, the control unit 50, the DB 60, the authentication unit 70, etc. are the access control system The hardware constituting 100 is functionally classified according to an operation performed by the corresponding hardware, and each unit is not necessarily provided independently of each other. Of course, depending on the embodiment, at least one of the communication unit 30, the sensor unit 40, the control unit 50, the DB 60, and the authentication unit 70 may be implemented as separate devices that are physically separated from each other. Do.

As described above with reference to FIG. 1, the photographing unit 10 is installed at a location capable of photographing the access route of the collective facility 1 and serves to capture an image of the access route. For example, the photographing unit 10 may be installed on a ceiling or a wall at a location where the vicinity of the entrance door of the collective facility 1 can be photographed, but the installation position of the photographing unit 10 is not limited thereto. The collective facility (1) may refer to a facility in which a large number of people live or work, such as apartments, officetels, and factories, and is not limited to a specific form.

In addition, the photographing unit 10 is a device configured to photograph an image of an access route through which a person or vehicle enters or exits the collective facility 1, and may be, for example, a CCTV, but is not limited thereto. The photographing of the access route by the photographing unit 10 may be configured to be performed at all times, or it is preset in response to a specific event such as manipulation of the operation unit 20 or detection of a visitor by a sensor (not shown). It may be configured to take a picture of the access route during the time.

The operation unit 20 is a device configured to operate for opening/closing a blocking facility accessing the collective facility 1 or registering an access fact. For example, the operation unit 20 may be a locking device provided at an entrance door of a building and configured to input a password or fingerprint using a keypad. In addition, at this time, the blocking device that is opened and/or closed by the operation of the operation unit 20 refers to any means related to the access to the collective facility 1, and for example, the blocking device is the door itself or installed on the door. It may be a locking device, a blocking rod for controlling the access of the vehicle, or any means for controlling the access to the collective facility 1 in other ways.

In addition, the manipulation of the manipulation unit 20 may not necessarily be for operating the physical blocking device. For example, even if there is no device that physically blocks access to the collective facility (1), a person entering the collective facility (1) may manipulate the control unit 20 for the purpose of recording the fact of his/her access. . For example, when the collective facility (1) is a working space of a company, the control unit 20 may correspond to a device used by employees of the company to register their attendance and time, or whether they leave work and the time. .

When it is confirmed that the user enters or exits the collective facility 1 through a user input to the operation unit 20, the control unit 50 may generate access event information corresponding to the user input received on the operation unit 20. . The access event information may include an access date and time and contents of a user input input to the control unit 20. In addition, when a person entering information that can identify himself/herself (fingerprint, the number of the visitor used in the collective facility, the visitor's employee number, etc.) is entered into the control unit 20, the access event information includes the visitor's identification information. It can also be included together.

In addition, the control unit 50 may upload the generated access event information to a data block on the blockchain network 2 so that the access event information is stored in a distributed ledger on the blockchain network 2. In addition, the controller 50 may store the access image captured by the photographing unit 10 according to the access time point of the access event information using the blockchain network 2. The above operation may be performed by the control unit 50 controlling the communication unit 30.

In one embodiment, the controller 50 may generate a hash value of the access event information and upload the access event information, including the hash value, to a data block on the blockchain network 2. In addition, the control unit 50 may upload the access event information to the blockchain network 2 in the form of a smart contract. At this time, the access event information is in the form of a smart contract in the form of a smart contract that defines transactions related to the deposit and withdrawal of tokens whose transaction details are recorded and managed by the distributed ledger on the blockchain network (2). Is stored in a block of data on the top.

Meanwhile, in an embodiment, the control unit 50 may upload an access image corresponding to the access event information to a data block on a sidechain other than the main net of the blockchain network 2. When uploading the access video to the sidechain, there is an advantage that it can significantly increase the transaction processing speed and lower the fee burden by introducing a sidechain that uses a consensus algorithm such as Proof of Authority (POA). . In addition, there are advantages such as allowing the service provider of the sidechain service to bear the transaction fee, and being able to use the signature function of a third-party e-wallet application with high ease of use so that transaction signing is easy.

On the other hand, if the access video is uploaded to the sidechain as it is, the transaction processing performance may deteriorate, and the fee burden of the service provider providing the sidechain service may increase. To solve this problem, in one embodiment, the access video is stored in a separate storage such as DB 60 of the access control system, and only the storage location information of the access video on the DB 60 is included in a transaction and uploaded to the sidechain. By doing so, you can also lighten the transaction.

In one embodiment, the sensor unit 40 may be configured to detect the presence or location of a person in the assembly facility 1 using one or more sensors 4 installed in the assembly facility 1. For example, one or more sensors 4 may be installed in each room or area that divides the internal space of the collective facility 1, and may be infrared sensors capable of detecting a person in the corresponding room or area. In addition, the sensor 4 may be integrally formed with a lighting fixture inside the assembly facility 1. However, the sensor 4 may be any device capable of detecting the presence or location of a person, and is not limited to the above-described configuration.

When the presence/absence and/or location of a person in the collective facility 1 is detected by the sensor unit 40, the control unit 50 includes an access event and a sensor unit generated in a state in which a person is detected by the sensor unit 40. It is also possible to define the access events generated in the state where no person is detected by (40) as different types of smart contracts and upload them to the data block on the blockchain network (2). For example, when an access event occurs in a state in which no person is detected by the sensor unit 40, it is regarded as having higher importance than a normal access event, and this may be defined as a different type of smart contract.

In one embodiment, the access control system receives accessor identification information through communication with the accessor's user device (not shown) when there is a person entering or exiting the collective facility 1 using the control unit 20, or/or It can perform the function of authenticating the access authority of the visitor. For example, when there is a user input for access to the control unit 20, identification information (eg, mobile phone number) of the user device is input through the control unit 20, and the authentication unit 70 One-time authentication information (eg, password) can be transmitted. Thereafter, the authentication unit 70 may enable access to the collective facility 1 by opening the blocking device only when the disposable authentication information identical to the disposable authentication information transmitted to the accessor is input to the operation unit 20.

According to the present embodiment, since identification information (eg, mobile phone number) of a user device capable of identifying the person who enters the assembly facility 1 is input to the operation unit 20, the assembly facility 1 ), the list of accessors and records can be managed, and the corresponding identification information can be included in the access event information and stored in the blockchain network (2).

In addition, according to the present embodiment, it is possible to check whether the corresponding person has access rights to the collective facility 1 by using the identification information of the user device input by the person accessing. To this end, user information including identification information of user devices of users with access rights to the collective facility 1 may be stored in advance in the DB 60 of the access control system, and the authentication unit 70 includes an operation unit ( By comparing the identification information of the user device entered in 20) with the user information of the DB 60, it is possible to verify whether the currently requesting access is a user who has access rights, and access is restricted by a user without access rights. If requested, it is possible to control the blocking device of the operation unit 20 and the assembly facility 1 to reject the access request. Furthermore, the fact of an access request by an unauthorized user may be stored in a data block on the blockchain network 2 as a type of access event information.

3 is a flowchart illustrating each step of an access control method according to an exemplary embodiment. The access control method according to the embodiments may be performed using the access control system according to the embodiments of the present invention. Hereinafter, for convenience of description, each step of the access control method according to embodiments will be described with reference to FIGS. 1 to 3.

First, the access control system may capture an access image for the access route of the collective facility 1 by the photographing unit 10 (S1). In one embodiment, the access control system may detect the presence or location of a person in each room or area in the collective facility 1 using one or more sensors 4 of the sensor unit 40 (S2). The above photographing and detection operations may be performed at all times, or may be performed only when a specific event such as manipulation of the manipulation unit 20 occurs.

When a visitor wishing to enter the assembly facility 1 manipulates the control unit 20 to request access (S3), the access control system stores access event information by the process described below, and stores the access event information in the control unit 20. Depending on the operation, the opening or closing of the blocking facility for the access route can be performed. At this time, the blocking facility may refer to a locking device for an entrance door or a rod for blocking vehicle entry, but is not limited thereto.

In an embodiment, the access control system may be further configured to receive identification information of the visitor through the operation unit 20, and further, may be further configured to perform authentication for the visitor using the identity information of the visitor. To this end, first, the access control system may specify an accessor through a user input to the operation unit 20 (S4). This allows the visitor to identify himself/herself, such as identification information (e.g., mobile phone number) of his/her user device, the number of persons used in the pre-set assembly facility, the employee number of the visitor, and the fingerprint of the visitor when entering the collective facility (1). This can be done by having to enter information that is available.

When the accessor is specified, the access control system may transmit one-time authentication information (eg, authentication number) to the user device of the corresponding accessor (S5). This may be accomplished by sending a text message or push notification of an application to the entered number when the person entering his or her mobile phone number on the control panel 20, or by sending the user to the access control system in advance. When the information is stored in a DB, identification information of the visitor may be retrieved from the user information of the DB 60 and authentication information may be transmitted to the user device of the corresponding visitor through text message or push notification.

When the accessor who has received the authentication information enters the authentication information into the control panel 20 (S6), the access control system verifies whether the authentication information transmitted to the accessor matches the authentication information input into the control panel 20, and enters the access event. Information can be generated (S7). The access event information may include the date and time of access, identification information related to the user requesting access, information on whether or not the user is allowed to enter.

In addition, if the authentication information transmitted to the visitor and the authentication information input to the operation unit 20 match, the access control system is configured to allow the corresponding person to enter or exit the collective facility (1). The blocking device of (1) can be controlled (S8). However, depending on the embodiment, the blocking facility may refer to the door itself of the assembly facility 1 that is not equipped with a separate locking device, and in this case, the blocking device control process (S8) by the access control system is required. You may not.

Meanwhile, the access control system may store the above-described access event information in a data block on the blockchain network 2 (S9). In one embodiment, the access event information may be recorded in a distributed ledger on the blockchain network 2 in the form of a smart contract that defines a transaction based on a token managed on the blockchain network 2. In addition, an access image captured by the photographing unit 10 at a time corresponding to the access date and time of the access event information may also be stored using the blockchain network 2.

According to the above embodiment, since the records of access to the collective facilities (1) such as buildings are recorded in the form of smart contracts in the distributed ledger on the blockchain network (2), semi-permanent storage of the access records is possible, and malicious users are allowed to enter. Falsification of records can be prevented, and access records can be easily viewed when necessary. In addition, if additional identification information related to the visitor is received when an access event occurs, the access control system is included in the visitor list to prevent the spread of diseases such as coronavirus infection (COVID-19). It can be used for writing.

4 is a flowchart illustrating each step of a process of storing access event information in a blockchain network in an access control method according to an embodiment.

1, 2 and 4, in this embodiment, the access information to the collective facility 1 is a transaction related to the movement of the token in which the transaction details are recorded by the distributed ledger on the blockchain network 2. It is recorded in the data block on the blockchain network (2) in the form of a defined smart contract. To this end, in the present embodiment, the control unit 50 of the access control system may assign a unique e-wallet address to each of users having access rights to the collective facility 1.

In addition, in an embodiment, the control unit 50 may provide a predetermined amount of tokens to each user's electronic wallet address at regular intervals (S10). This is to manage the access event in connection with the token transaction on the blockchain network (2) by defining a smart contract so that the deposit or withdrawal of the token using the user's electronic wallet address occurs when an access event occurs. It will be described later.

When an access event occurs by an accessor to the collective facility 1 manipulating the control unit 20 (S11), the control unit 50 provides the access date and time, identification information related to the accessor (identification information of the number or area to be entered, individual accessor The access event information may be generated by using information such as identification information of, or the identification information of the user device of the visitor), and/or whether access is permitted as a single data record (S12). In addition, the control unit 50 may generate a hash value of the access event information to be uploaded to the blockchain network 2.

Next, the controller 50 uploads the access event information to the data block on the blockchain network 2, so that the access event information can be recorded in the distributed ledger on the blockchain network 2 (S13). In addition, in an embodiment, the control unit 50 may store an access image at a time point corresponding to the access date and time of the access event information using the blockchain network 2 (S14). The access video may be stored in the main net of the blockchain network 2, similar to the access event information, or may be stored in a data block on the sidechain that operates in conjunction with the main net of the blockchain network 2. Alternatively, the access image itself may be stored in the access control system, and information on the storage location may be converted into a form such as a hash value and stored in the sidechain of the blockchain network 2.

In one embodiment, the smart contract in which the access event information is recorded, the token managed by the blockchain network 2 is deducted from the electronic wallet address of the user identified as the accessor, or the access control system is applied to the electronic payment address of the user. It is a contract for depositing tokens from the electronic wallet address of the administrator of, and when an access event occurs, an access control system may be configured so that the deposit and withdrawal of the token is performed accordingly (S15). This will be used for the purpose of storing the access record in the blockchain network 2 by the access control system, furthermore, to manage the outing time or staying time of users based on the access record based on the deposit and withdrawal of tokens. I can.

For example, the control unit 50 of the access control system may collectively provide the same amount of tokens to users who have access rights to the collective facility 1 at regular intervals (e.g., 1 day) ( S10). Thereafter, when a specific user's access event occurs, the control unit 50 of the access control system determines the type (entry or exit) of the same user's previous access event, the access date and time, the type of the current access event (entry or exit) and access. By comparing the date and time, it is possible to calculate the time for the user to go out. For example, if the previous access event is an exit event that occurred at 15:00, and this entry event is an entry event that occurred at 16:00, comparing both access events, the user has gone out from the collective facility (1) for 1 hour. It can be seen that it was in a state.

At this time, the control unit 50 stores the access event information on the blockchain network 2 when the time out when the user has left the collective facility 1 is defined through a comparison between a specific access event and the immediately preceding access event, Access event information can be stored in the distributed ledger in the form of a smart contract in which an amount of tokens corresponding to the user's outing time is withdrawn from the user's e-wallet address and deposited to the e-wallet address of the operator of the access control system.

For example, assuming that 100 tokens are paid every day to each user with access authority, and 20 tokens are transferred from the visitor to the operator every time an hour of going out is recognized through an access event, each user goes out. Time is managed in the form of token transfer amount, and each user can go out for up to 5 hours per day.

When the amount of time to go out exceeds the amount of tokens paid, that is, when the amount of tokens to be transferred corresponding to the amount of time out is greater than the remaining amount of tokens in the user's electronic wallet address, the control unit 50 informs the DB 60 By recording in or notifying the user through the operation unit 20, the user or the administrator of the access control system may know this. Alternatively, the control unit 50 may access the operation unit 20 or the collective facility 1 so that the user cannot access when going out, etc., requiring the movement of more tokens than the remaining amount of tokens remaining in the user's electronic wallet address. It is also possible to control the blocking device for the path.

In the above-described embodiment, when the collective facility (1) is a company and each user is an employee of the company, it is used to manage the working attitude through management of the employee's outing time, or the collective facility (1) is a collective residence such as an apartment. It is a facility, and if each user is a resident of an apartment, etc., it can be used for purposes such as to provide appropriate guidance by specifying the residents who have been away for a long time. In addition, although the present specification has described an embodiment of calculating the time to go out through the type of the access event and the date and time of access, the access control system to manage the stay time of each user in the collective facility 1 using the same principle. It is also possible to configure.

Furthermore, token transaction using the electronic wallet address of the visitor is based on whether a person in the collective facility 1 is detected by the sensor at the time of the access event, and the amount of tokens or the transaction type (i.e., deposit or withdrawal) is determined. It can be done differently. For example, if the collective facility (1) is a corporate building, an access event that occurs during the commute time without a person being detected in the collective facility (1) means that the person entering the corporate building is the earliest. It is also possible to realize compensation according to the type of access event using tokens on the blockchain network (2), such as paying corresponding token compensation to the electronic wallet address of the visitor.

The operation by the access control method according to the embodiments described above may be implemented at least partially as a computer program and recorded on a computer-readable recording medium. A recording medium in which a program for implementing an operation according to the access control method according to the embodiments is recorded and the computer-readable recording medium includes all types of recording devices in which data that can be read by a computer is stored. Examples of computer-readable recording media include ROM, RAM, CD-ROM, magnetic tape, floppy disk, and optical data storage devices. In addition, the computer-readable recording medium may be distributed over a computer system connected through a network, and computer-readable codes may be stored and executed in a distributed manner. In addition, functional programs, codes, and code segments for implementing this embodiment may be easily understood by those of ordinary skill in the art to which this embodiment belongs.

The present invention described above has been described with reference to the embodiments shown in the drawings, but these are merely exemplary, and those of ordinary skill in the art will understand that various modifications and variations of the embodiments are possible therefrom. However, such a modification should be considered to be within the technical protection scope of the present invention. Therefore, the true technical scope of the present invention should be determined by the technical spirit of the appended claims.

Claims (11)

A photographing unit installed in an assembly facility and configured to photograph an image of one or more access routes to the assembly facility;
An operation unit installed in the collective facility and configured to receive a user input associated with one or more of opening and closing of the blocking facility installed in the one or more access paths;
A communication unit configured to communicate with a blockchain network maintained by a plurality of nodes;
Generates access event information according to the user input received from the control unit, and stores the access event information and the access image captured by the photographing unit corresponding to the occurrence time of the access event using the blockchain network. And a control unit configured to control the photographing unit and the communication unit so as to be,
The controller generates a hash value of the access event information, uploads the access event information in the form of a smart contract including the hash value to a data block on the blockchain network, and transfers the access image to the access event information It is further configured to upload to a data block on the sidechain that is linked with the blockchain network,
Further comprising a sensor unit installed in the assembly facility and configured to detect the presence or location of a person in the assembly facility,
The control unit defines an access event generated when a person is detected by the sensor unit and an access event generated when a person is not detected by the sensor unit as different types of smart contracts, and the blockchain network Access control system further configured to upload to data blocks on the screen
delete delete delete delete An access control system installed in the assembly facility taking an image of one or more access routes to the assembly facility;
Receiving, by the access control system, a user input associated with at least one of opening and closing of blocking facilities installed in the at least one access path;
Generating, by the access control system, access event information corresponding to the user input; And
The access control system includes storing, by the access control system, the access video captured in accordance with the access event information and the occurrence time of the access event on a blockchain network maintained by a plurality of nodes,
The step of storing on the blockchain network,
Generating, by the access control system, a hash value of the access event information;
Uploading, by the access control system, the access event information to a data block on the blockchain network in the form of a smart contract including the hash value; And
And uploading, by the access control system, the access image to a data block on a sidechain linked to the block chain network in association with the access event information,
Before the step of receiving the user input, the access control system further comprises the step of detecting the presence or location of a person in the collective facility by one or more sensors installed in the assembly facility,
The uploading of the data block on the blockchain network may include an access event generated when a person is detected by the one or more sensors and a state in which a person is not detected by the one or more sensors, by the access control system. An access control method comprising the step of defining the entered access events as different types of smart contracts and uploading them to a data block on the blockchain network.
delete delete delete delete A computer program that is combined with hardware and stored in a computer-readable recording medium to execute the access control method according to claim 6.

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