KR102271201B1 - Method for maintaining private information on blockchain network and device thereof - Google Patents

Abstract

A method for a plurality of users to store and manage personal information in a block chain network in order to receive a service from at least one service provider according to an embodiment of the present invention is a method in which an administrator of the block chain network receives personal information from each of the plurality of users. Receiving personal information including personal identification information, which is information for identifying a person, and additional information, which is additional information about an individual; generating, by the administrator, a unique identifier for each of the plurality of users using the personal identification information; adding, by the administrator, a block including the identifier and the personal identification information to a main channel of the blockchain network including the at least one service provider and the administrator; and adding, by the administrator, a block including the identifier and the additional information to a subchannel of the blockchain network including the administrator.

Description

A method for managing personal information using a block chain and a block chain network manager to which the method is applied {METHOD FOR MAINTAINING PRIVATE INFORMATION ON BLOCKCHAIN NETWORK AND DEVICE THEREOF}

The present invention relates to a method for managing personal information using a block chain and a block chain network manager to which the method is applied.

In order to receive a service using the Internet, a user must register with a service company in the same form as a member registration in order to receive the service. To this end, the user provides his/her personal information to the service provider. In this process, individuals can be authenticated and information can be provided through mobile phone authentication, i-PIN, and public certificates. However, personal information is managed individually for each service company, and is not managed in an integrated way.

In addition, since personal information is stored and managed by each company, various security devices such as intrusion detection systems, firewalls, and access control systems must be independently operated to protect personal information. However, due to the advancement of attack technology by malicious users, it is practically difficult to prevent leakage of personal information from all attacks, and internal leakage of personal information continues to occur. Furthermore, since it is difficult to confirm the occurrence of such damage in real time, secondary damages such as voice phishing and identity theft due to personal information leakage are occurring.

Accordingly, there is a need for a personal information management method that not only manages users' personal information used in various service companies in an integrated way, but also ensures high security and reliability.

Korean Patent Publication No. 10-1893729 (Aug. 24, 2018)

An object of the present invention is to provide a method for distributing and managing personal information that secures high security and reliability of personal information by integrating and managing user's personal information using a block chain.

The technical problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, the personal information management method using the block chain provided by the present invention is a method for a plurality of users to store and manage personal information in a block chain network in order to receive a service from at least one service provider. , receiving, by the administrator of the block chain network, personal information including personal identification information, which is information for identifying an individual, and additional information, which is additional information about the individual, from each of the plurality of users; generating, by the administrator, a unique identifier for each of the plurality of users using the personal identification information; adding, by the administrator, a block including the identifier and the personal identification information to a main channel of the blockchain network including the at least one service provider and the administrator; and adding, by the administrator, a block including the identifier and the additional information to a subchannel of the blockchain network including the administrator.

Preferably, after the step of generating the unique identifier, the method may further include, by the administrator, transmitting the generated identifier to each of the plurality of users.

Preferably, after the step of transmitting the generated identifier, the manager receives an information inquiry request including inquiry information that is information about the identifier and the inquiry target from a first user who is one of the plurality of users step; transmitting, by the administrator, a user authentication request for requesting predetermined authentication information to the first user; receiving, by the administrator, the authentication information from the first user; The manager obtains result information corresponding to the inquiry information from the main channel or the sub-channel by operating the inquiry chain code, which is a chain code that performs inquiry of the block including the identifier according to the reception of the authentication information. to do; and transmitting, by the manager, the result information to the first user.

Preferably, after the step of transmitting the generated identifier, the administrator sends an information change request including correction information, which is information about the identifier and optionally a correction target, from a first user who is one of the plurality of users. receiving; transmitting, by the administrator, a user authentication request for requesting predetermined authentication information to the first user; receiving, by the administrator, the authentication information from the first user; A change chain code, which is a chain code for which the manager performs a change of a block including the identifier according to the reception of the authentication information, operates, so that the identifier is transmitted from the main channel or the sub-channel according to whether the correction information is included. correcting or deleting personal information corresponding to and transmitting, by the administrator, change information, which is information on a result of the modification or deletion, to the first user.

Preferably, when a target service provider that is one of the at least one service provider receives a service provision request from a second user who is one of the plurality of users, the manager corresponds to the second user from the target service provider receiving an information inquiry request including inquiry information that is information about an identifier and an inquiry target; transmitting, by the administrator, a user authentication request requesting predetermined authentication information to the second user; receiving, by the administrator, the authentication information from the second user; In response to the receipt of the authentication information, the manager operates a query chain code, which is a chain code corresponding to an inquiry stored in the block including the identifier, to retrieve result information corresponding to the inquiry information from the main channel or the sub-channel. obtaining; and transmitting, by the manager, the result information to the target service provider.

Preferably, after the operation of the chaincode, the method may further include the step of recording, by the administrator, a log corresponding to the operation of the chaincode.

In addition, in order to achieve the above object, a blockchain network manager that stores and manages personal information provided by the present invention is a block chain in which a plurality of users store and manage personal information in order to receive services from at least one service provider. A network manager comprising: a communication unit for receiving personal information including personal identification information, which is information for identifying an individual, and additional information, which is additional information about an individual, from each of the plurality of users; an identifier generator for generating a unique identifier for each of the plurality of users by using the personal identification information; and adding the block including the identifier and the personal identification information to the main channel of the block chain network including the at least one service provider and the manager, and adding the block including the identifier and the additional information to the manager It includes; a block chain connection unit that is added to the sub-channel of the block chain network including.

Preferably, when a target service provider that is one of the at least one service provider receives a service provision request from a second user who is one of the plurality of users, the communication unit responds to the second user from the target service provider Receives an information inquiry request including inquiry information that is information about an identifier and an inquiry target, transmits a user authentication request requesting predetermined authentication information to the second user, and receives the authentication information from the second user, , the block chain connection unit operates a query chain code, which is a chain code corresponding to an inquiry stored in a block including the identifier, according to the reception of the authentication information, and results corresponding to the inquiry information from the main channel or the sub-channel After obtaining the information, the communication unit may transmit the result information to the target service provider.

Preferably, after the operation of the inquiry chain code, a log recorder for recording a log corresponding to the operation of the inquiry chain code may be further included.

The present invention eliminates the need for individual personal information storage and management of service providers by integrating and managing user information by an administrator using a block chain. That is, since the service provider does not store personal information, it is possible to prevent leakage of personal information. In addition, since the administrator is in charge of managing the user's personal information, the service provider can reduce the related system operation cost.

In addition, in the present invention, the user and the service provider cannot directly access the personal information stored step by step, and in the case of the service provider, it is also impossible to request an inquiry without the user's request, so higher security is secured compared to the existing personal information management. In addition, when personal information is inquired or changed through an administrator, the reliability of the administrator can be secured by storing the relevant details in the network.

In addition, the range of personal information stored in the present invention can be expanded according to the needs of the user. Users can store information other than personal information required by multiple service providers in the blockchain. That is, since the user can deliver information to a plurality of service providers by storing information once, convenience can be increased.

Effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those skilled in the art from the following description.

1 is a flowchart illustrating a personal information management method using a block chain according to an embodiment of the present invention.
2 is a flowchart illustrating a user's personal information inquiry method according to an embodiment of the present invention.
3 is a flowchart illustrating a method of changing a user's personal information according to an embodiment of the present invention.
4 is a flowchart illustrating a method of inquiring personal information of a service provider according to an embodiment of the present invention.
5 is a block diagram illustrating a blockchain network manager for storing and managing personal information according to an embodiment of the present invention.
7 and 8 are diagrams illustrating the structure of blocks of a main channel and a sub-channel according to an embodiment of the present invention.

Since the present invention can have various changes and can have various embodiments, specific embodiments will be described in detail with reference to the drawings. However, this is not intended to limit the present invention to specific embodiments, and it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention. In describing each figure, like reference numerals have been used for like elements.

Terms such as first, second, A, and B may be used to describe various elements, but the elements should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, a first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. and/or includes a combination of a plurality of related description items or any of a plurality of related description items.

When a component is referred to as being “connected” or “connected” to another component, it may be directly connected or connected to the other component, but it should be understood that other components may exist in between. something to do. On the other hand, when it is said that a certain element is "directly connected" or "directly connected" to another element, it should be understood that no other element is present in the middle.

The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It should be understood that this does not preclude the existence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not

Throughout the specification and claims, when a part includes a certain element, it means that other elements may be further included, rather than excluding other elements, unless specifically stated to the contrary.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

Blockchain was first implemented in "Bitcoin: A Peer-to-Peer Electronic Cash System", a paper submitted by Satoshi Nakamoto. Blockchain is a distributed, independent and open common ledger management technology. All users participating in the blockchain own the contents of the common ledger, and only blocks approved by more than half of the participants are connected to the blockchain. Initially, block chain was used as a base technology for virtual currency, but recently, it is presenting a business model that replaces the existing system. This is because existing services or new services can be built at low cost through blockchain. In addition, it is often applied to log-based services by maintaining integrity through a shared ledger.

In the present invention, a user, an administrator, and a service provider may mean a smartphone, a notebook computer, a desktop computer, a tablet PC, or other computing device used by the user, the administrator, and the service provider, respectively.

Meanwhile, with reference to FIG. 6 , a user, an administrator, and a service provider of the present invention will be described.

The administrator may act as a trusted authority in the present invention. In other words, it can perform the role of registering and managing basic personal information and additional information of all service providers and users in the blockchain. In addition, if the user's personal information is necessary to the service providers, it can be provided. In addition, administrators can manage certificates and private/public keys of nodes belonging to the blockchain network. The administrator provides a service module to create, modify, and view personal information, and users can manage personal information through a distributed app. Service providers are included in the same blockchain network as managers and can exchange information through request/service modules.

A service provider may generally perform a role of providing various services to users using the Internet. The service provider may request the user's personal information necessary from the manager, and may provide the service to the user by receiving the request. In order for a service provider to request a user's personal information, it may need to be authenticated by an administrator in advance. The service provider cannot read the user's personal information alone, and can only view the user's personal information at the request of the user.

Users can provide administrators with the ability to store their personal information in the block chain and protect their personal information. The user has an identifier given by the administrator, and this identifier can be used for functions such as viewing, modifying, and deleting personal information. In general, data on the blockchain cannot be deleted, but if deletion is unavoidable due to, for example, a user's death or immigration, a function such as deletion can be performed by changing the data corresponding to the user's identifier to blank. have. When requesting access to personal information from a service provider, the administrator can check whether the user agrees or not and deliver personal information to a specific service provider.

1 is a flowchart illustrating a personal information management method using a block chain according to an embodiment of the present invention.

In step S110, the manager of the block chain network receives personal information including personal identification information, which is information for identifying an individual, and additional information, which is additional information about the individual, from each of a plurality of users.

Here, the plurality of users may be users of services provided by at least one service provider. In addition, the service provided by the service provider may be various types of services provided through the Internet. For example, games, shopping, music, movies, video streaming, etc. may correspond.

The personally identifiable information may be information used to identify an individual. For example, it may be a user ID, name, contact information, and the like. In addition, the additional information may be personal information of various users in addition to personal identification information. For example, it may be a resident registration number, an address, a password, and the like.

Preferably, the additional information may be information more sensitive to security than personally identifiable information. This may be because, as described below, in the present invention, for security reasons, the blockchain network is divided into a main channel and a sub-channel and managed separately.

In step S120, the administrator generates a unique identifier for each of the plurality of users using personal identification information.

In this case, the identifier may mean a unique constant value generated based on personal identification information. For example, assuming that ID, name, and contact information are included in the personally identifiable information, there will be no users with the same ID, name, and contact information, so the administrator can create different identifiers for a plurality of users. do.

In step S130, the manager adds a block including the identifier and personal identification information to the main channel of the block chain network including at least one service provider and the manager.

Here, referring to FIG. 7 , the block of the main channel may be composed of a block header, transaction information, consensus information, and data part, and in the header part of the block, the number of the block, the hash value of the previous block, and the hash value of the current block This can be saved. In the transaction information part, chaincode-related information used when executing a transaction may be stored. In the consensus information part, certificates, public keys, and digital signatures of nodes agreed upon when a transaction is submitted may be stored. The main channel is a channel in which all nodes of the blockchain network participate, and can store identifiers and personally identifiable information (eg, name, contact information, ID, etc.) in the data part. The identifier is stored to identify the user within the network, and personally identifiable information can be used together with the identifier to prove that the user is an authenticated user.

Finally, in step S140, the manager adds a block including the identifier and additional information to the subchannel of the block chain network including the manager.

Here, referring to FIG. 8 , the header, transaction information, and agreement information part of the block of the subchannel may be the same as the configuration of the main channel block. In the data part of the sub-channel block, personal information such as an identifier that can identify the user's information and additional information (eg, resident registration number, address, and password proving that the user is an authenticated user) can be stored. A block of another subchannel, which is opened to store additional information later, also has the same configuration, and only the data part of the block may be changed according to the characteristics of the additional information to be stored.

In another embodiment, an administrator may send the generated identifier to each of a plurality of users.

In this case, a plurality of users may use the transmitted identifier for inquiring, deleting, or correcting personal information. Specific details on this will be described later in detail with reference to FIGS. 2 to 4 .

In another embodiment, an administrator may provide a service using a blockchain network including one main channel and a plurality of sub-channels.

In this case, the main channel may be a channel in which users, administrators, and service providers participate, and basic transactions for personal information distribution are performed. Information (identifier) that can identify a user is stored in the main channel, and users and service providers can request personal information by using the identifier. In addition, the sub-channel is a channel including only the administrator, and may store additional information other than the main personal information at the request of the user. The subchannel may provide additional information of a user corresponding to the identifier by sharing the identifier stored in the main channel. In addition, a sub-channel may be additionally opened according to the personal information of the user who wants to distribute it.

In other words, the main channel stores the user's identifier and the sub-channel stores actual personal information, so that personal information can be managed step by step. In other words, the main channel can be accessed by all members of the blockchain network, but only the administrator can access it because the user's direct personal information is stored in the sub-channel. In this way, by restricting access rights for each channel, intrusion and hacking from outside can be prevented. Therefore, the user's sensitive personal information can only be viewed through the administrator. Later, when the administrator wants to store additional information according to the user's needs, he/she can open and store a new sub-channel. As such, distributing and storing the user's personal information using a plurality of subchannels can facilitate management and improve the overall security of the system.

2 is a flowchart illustrating a user's personal information inquiry method according to an embodiment of the present invention.

Meanwhile, the description of FIG. 2 below assumes that all of the processes described with respect to FIG. 1 have been completed.

In step S210, the manager receives an information inquiry request including inquiry information, which is information about an identifier and an inquiry target, from a first user who is one of the plurality of users.

For example, the manager may receive an information inquiry request including inquiry information for requesting an inquiry about the identifier and ID from the first user.

In step S220, the manager transmits a user authentication request requesting predetermined authentication information to the first user.

That is, the administrator may transmit a user authentication request to confirm whether the first user is a party capable of inquiring information.

In step S230, the administrator receives authentication information from the first user.

For example, the administrator may receive authentication information such as an identifier, ID, password, etc. from the first user in response to the user authentication request.

In step S240, the manager obtains the result information corresponding to the inquiry information from the main channel or the sub-channel by operating the inquiry chain code, which is a chain code for inquiry of the block including the identifier according to the reception of the authentication information. .

Here, the chaincode is a kind of digital automation contract in which the contract is executed without human intervention if the conditions are met, also called a smart contract. For example, the inquiry chaincode may be a code that executes a contract that performs inquiry of a block including an identifier, subject to the administrator receiving the authentication information.

That is, the manager can obtain the result information corresponding to the inquiry information from the sub-channel due to the operation of the inquiry chain code. For example, when the inquiry information requests an inquiry about an address, information about the address may be acquired from a main channel or a sub-channel.

Finally, in step S250, the manager transmits the result information to the first user.

3 is a flowchart illustrating a method of changing a user's personal information according to an embodiment of the present invention.

Meanwhile, the description of FIG. 3 below assumes that all of the processes described with reference to FIG. 1 have been completed.

In step S310, the administrator receives an information change request including an identifier and, optionally, correction information, which is information about a correction target, from a first user who is one of a plurality of users.

That is, the manager may receive an information change request including an identifier from the first user or an information change request including an identifier and correction information.

At this time, if the information change request does not include the correction information, the administrator may determine that the request to delete the information corresponding to the identifier from the block chain. In addition, when the information change request includes correction information, the administrator may determine that the information corresponding to the identifier in the block chain is requested to be corrected based on the correction information.

In step S320, the administrator transmits a user authentication request for requesting predetermined authentication information to the first user.

In step S330, the administrator receives authentication information from the first user.

In step S340, a change chain code, which is a chain code for changing a block including an identifier, is operated by the administrator according to the reception of the authentication information, so that the identifier is changed from the main channel or sub-channel depending on whether the correction information is included or not. Correct or delete the corresponding personal information.

In this case, the change chain code may be a code that executes a contract to change the block including the identifier, subject to the administrator receiving the authentication information.

More specifically, the change chain code modifies the block containing the identifier if the information change request contains correction information, and if the information change request does not contain the correction information, the data of the block containing the identifier (e.g., identifier, contact, ID, name, address, etc.) can be deleted.

Finally, in step S340, the administrator transmits change information, which is information on the result of the modification or deletion, to the first user.

4 is a flowchart illustrating a method of inquiring personal information of a service provider according to an embodiment of the present invention.

Meanwhile, the description of FIG. 4 below assumes that all of the processes described with respect to FIG. 1 are completed.

Also, it is assumed that a target service provider that is one of at least one service provider receives a service provision request from a second user that is one of a plurality of users.

In step S410, the manager receives an information inquiry request including inquiry information that is information on an identifier corresponding to the second user and inquiry object from the target service provider.

That is, the manager may receive an information inquiry request including the identifier of the second user and inquiry information of the second user from the target service provider. In this case, the target service provider receives the identifier directly while receiving a service provision request from the second user, or uses personal identification information such as ID included in the service provision request of the second user, the identifier of the second user stored in the main channel information can be obtained.

In step S420, the administrator transmits a user authentication request requesting predetermined authentication information to the second user.

In this case, the user authentication is to confirm whether the request of the target service provider is based on the request of the second user, and may be performed in the form of obtaining consent for personal information inquiry.

In step S430, the administrator receives authentication information from the second user.

In step S440, the manager acquires the result information corresponding to the inquiry information from the main channel or the sub-channel by operating the inquiry chain code, which is the chain code corresponding to the inquiry stored in the block including the identifier, according to the reception of the authentication information. do.

Finally, in step S450, the manager transmits the result information to the target service provider.

In this case, the target service provider can provide the service to the second user by receiving the result information from the manager.

In another embodiment, after the operation of the chaincode, the administrator records a log corresponding to the operation of the chaincode.

For example, the administrator can store a log corresponding to the operation on the blockchain network or in a separate database whenever the chaincode operates and performs inquiry or change.

In this way, by recording and preserving a log corresponding to the operation of the chaincode by the administrator, the reliability of the administrator can be secured.

5 is a block diagram illustrating a blockchain network manager for storing and managing personal information according to an embodiment of the present invention.

Referring to FIG. 5 , the blockchain network manager 500 for storing and managing personal information according to an embodiment of the present invention includes a communication unit 510 , an identifier generator 520 , and a block chain connection unit 530 . . Optionally, it may further include a log recording unit (not shown).

The communication unit 510 receives personal information including personal identification information, which is information for identifying an individual, and additional information, which is additional information about the individual, from each of a plurality of users.

The identifier generator 520 generates a unique identifier for each of the plurality of users by using personal identification information.

The block chain connection unit 530 adds a block including the identifier and personal identification information to the main channel of the block chain network including at least one service provider and a manager, and adds a block including the identifier and additional information to the manager. Add to the subchannel of the containing blockchain network.

Finally, the log recorder (not shown) records the log corresponding to the operation of the inquiry chain code after the operation of the inquiry chain code.

In another embodiment, when a target service provider that is one of the at least one service provider receives a service provision request from a second user who is one of the plurality of users, the communication unit 510 is configured to correspond to the second user from the target service provider. It is possible to receive an information inquiry request including inquiry information that is information about an identifier and an inquiry target, transmit a user authentication request requesting predetermined authentication information to the second user, and receive authentication information from the second user.

At this time, the block chain connection unit 530 operates the inquiry chain code, which is a chain code corresponding to the inquiry stored in the block including the identifier, according to the reception of the authentication information, so that the result information corresponding to the inquiry information from the main channel or the sub-channel can be obtained.

Also, the communication unit 510 may transmit the result information to the target service provider.

The above description is merely illustrative of the technical idea of the present invention, and various modifications and variations will be possible without departing from the essential characteristics of the present invention by those skilled in the art to which the present invention pertains. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical spirit of the present invention is not limited by these embodiments. The protection scope of the present invention should be construed by the following claims, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

Claims (9)

A method for a plurality of users to store and manage personal information in a blockchain network in order to receive a service from at least one service provider,
receiving, by the management device of the block chain network, personal information including personal identification information, which is information for identifying an individual, and additional information, which is additional information about the individual, from each of the plurality of users;
generating, by the management device, a unique identifier for each of the plurality of users using the personal identification information;
adding, by the management device, a block including the identifier and the personal identification information to a main channel of the block chain network; and
adding, by the management device, a block including the identifier and the additional information to a subchannel of the blockchain network;
including,
The main channel is a channel accessible to all members including service providers and administrators of the blockchain network, and the sub-channel is a channel accessible to the administrator. According to claim 1,
After generating the unique identifier,
transmitting, by the management device, the generated identifier to each of the plurality of users
Personal information management method using a block chain, characterized in that it further comprises. 3. The method of claim 2,
After transmitting the generated identifier,
receiving, by the management device, an information inquiry request including inquiry information, which is information about the identifier and an inquiry target, from a first user who is one of the plurality of users;
transmitting, by the management device, a user authentication request requesting predetermined authentication information to the first user;
receiving, by the management device, the authentication information from the first user;
When the management device receives the authentication information, the query chain code, which is a chain code for querying the block including the identifier, operates, and results information corresponding to the query information from the main channel or the sub-channel. obtaining a; and
transmitting, by the management device, the result information to the first user
Personal information management method using a block chain, characterized in that it further comprises. 3. The method of claim 2,
After transmitting the generated identifier,
receiving, by the management device, an information change request including correction information, which is information on the identifier and optionally a correction target, from a first user who is one of the plurality of users;
transmitting, by the management device, a user authentication request requesting predetermined authentication information to the first user;
receiving, by the management device, the authentication information from the first user;
A change chain code, which is a chain code for which the management device performs a change of a block including the identifier according to the reception of the authentication information, operates, so that the change chain code correcting or deleting personal information corresponding to the identifier; and
Transmitting, by the management device, change information, which is information on a result of the modification or deletion, to the first user
Personal information management method using a block chain, characterized in that it further comprises. According to claim 1,
When a target service provider that is one of the at least one service provider receives a service provision request from a second user that is one of the plurality of users,
receiving, by the management device, an information inquiry request including inquiry information that is information about an identifier corresponding to the second user and an inquiry target from the target service provider;
transmitting, by the management device, a user authentication request requesting predetermined authentication information to the second user;
receiving, by the management device, the authentication information from the second user;
When the management device receives the authentication information, the query chain code, which is a chain code corresponding to the query stored in the block including the identifier, operates, so that the result corresponding to the query information from the main channel or the sub-channel obtaining information; and
transmitting the result information to the target service provider by the management device
Personal information management method using a block chain, characterized in that it further comprises. 6. The method according to any one of claims 3 to 5,
Recording, by the management device, a log corresponding to the operation of the chaincode after the operation of the chaincode
Personal information management method using a block chain, characterized in that it further comprises. In the management device of a blockchain network in which a plurality of users store and manage personal information in order to receive a service from at least one service provider,
a communication unit for receiving personal information including personal identification information, which is information for identifying an individual, and additional information, which is additional information about an individual, from each of the plurality of users;
an identifier generator for generating a unique identifier for each of the plurality of users by using the personal identification information; and
a block chain connection unit for adding a block including the identifier and the personal identification information to a main channel of the block chain network, and adding a block including the identifier and the additional information to a subchannel of the block chain network;
including,
The main channel is a channel accessible to all members including service providers and administrators of the blockchain network, and the sub-channel is a channel accessible to the administrator. 8. The method of claim 7,
When a target service provider that is one of the at least one service provider receives a service provision request from a second user that is one of the plurality of users,
The communication unit receives an information inquiry request including inquiry information that is information about an identifier corresponding to the second user and an inquiry target from the target service provider, and a user authentication request for requesting predetermined authentication information from the second user and receiving the authentication information from the second user,
The block chain connection unit operates a query chain code that is a chain code corresponding to an inquiry stored in a block including the identifier according to the reception of the authentication information, so that the result information corresponding to the inquiry information from the main channel or the sub-channel to obtain,
The communication unit is a block chain network management device for storing and managing personal information, characterized in that for transmitting the result information to the target service provider. 9. The method of claim 8,
After the operation of the inquiry chaincode, a log recording unit that records a log corresponding to the operation of the inquiry chaincode
A block chain network management device for storing and managing personal information, characterized in that it further comprises.

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