KR20200093972A - Method and system for matching professional - Google Patents

Abstract

Provided are an expert matching method and a system. The method is the expert matching method of a user terminal which is operated by at least one processor. The expert matching method includes the steps of: receiving blocks including expert user reviews from other user terminals and adding the blocks to a blockchain; accessing an expert matching platform server and searching for expert information based on information input from the user; acquiring the review of an expert selected by the user from the searched expert information from the blockchain; and requesting and receiving the information of the expert finally selected by the user from the expert matching platform server.

Description

Expert matching method and its system{METHOD AND SYSTEM FOR MATCHING PROFESSIONAL}

The present invention relates to an expert matching method and its system.

In general, the majority of people who seek specialists, such as civil, criminal, tax, accounting, industrial property rights, real estate transactions, and request for appraisal, search through telephone or internet search, and then apply for counseling and cases through telephone. They choose to view and choose one-sided advertisements or profiles, and there is a problem that the client of the case is not sure whether they are the right experts for the case. Also, most people are reluctant to consult how to apply for expert consultation and how much it will cost.

As such, since the anxiety about searching for dozens of experts or searching for hundreds of experts does not disappear and sufficient counseling is not conducted, the client is in urgent need of an expert matching system that can solve these anxieties.

Also, I would like to obtain a reliable and verifiable babysitter and housekeeping helper, but in particular, there is no way to verify these service personnel, so I have no choice but to ask for an assessment of the level of awareness through neighboring networks.

The technical problem to be achieved by the present invention is to provide expert reputation information through customer testimonials for expert services, and to efficiently match experts who can provide services required by customers based on expert reputation information. It is to provide an expert matching method and its system.

An expert matching method according to an embodiment of the present invention is an expert matching method of a user terminal operated by at least one processor, receiving blocks including expert reviews from other user terminals and adding them to the blockchain, an expert Accessing a matching platform server, based on information input from the user, searching for expert information, obtaining a review of the expert selected by the user from the searched expert information from the blockchain, and the expert finally selected by the user And requesting and receiving information from the expert matching platform server.

Before the adding step, the method may further include executing an expert matching program to access the expert matching platform server, and connecting a plurality of different user terminals to peer to peer (P2P).

The expert matching program may include a smart contract received from the expert matching platform server.

The smart contract of claim 3, wherein the smart contract is composed of program codes indicating at least one operation of expert search, expert review writing and sharing, and expert use fee payment, and includes an access address of the expert matching platform server. Can.

After the receiving step, generating a first payment block that transfers the amount of use of the last selected expert from an electronic wallet of a user registered in the blockchain to an escrow electronic wallet, and the first payment block is transferred to other user terminals. Broadcasting to the client, receiving a contract fulfillment completion from the expert matching platform server, generating a second payment block for transferring the amount of money from the escrow electronic wallet to the expert electronic wallet, and the second payment The method may further include broadcasting the block to other user terminals.

The expert use cost may be applied to a discount according to whether or not an expert review is made.

After the step of receiving the completion of the contract, writing a review of experts, and The method may further include generating a block including the expert review, broadcasting it to other user terminals, and adding it to the blockchain.

The expert review can be encrypted with the user's private key that created the expert review and decrypted with the user's public key.

Broadcasting to the other user terminals and adding to the block chain include broadcasting a block including a hash operation value of a previous block stored in the block chain, and a previous block included in the broadcast block If the hash operation value of is equal to the hash operation value of the previous block stored in other user terminals, the method may include adding the broadcast block to the blockchain.

Expert matching system according to another embodiment of the present invention is composed of a plurality of user terminals sharing a block, a blockchain system for recording a blockchain including expert reviews, and a user terminal of one of the plurality of user terminals When receiving an expert search request from, and transmitting expert information that satisfies a search requirement included in the expert search request among a plurality of expert information to the one user terminal, and receiving expert selection information from the one user terminal , An expert matching platform server transmitting matching information to the one user terminal and the selected expert terminal.

The matching information may include information of the user terminal, information of the expert, and service request condition information of the user terminal.

The matching platform server may generate a smart contract composed of program codes instructing at least one operation of expert search, writing and sharing expert reviews, and payment of expert use fees, and transmit the generated smart contract to the blockchain system.

The one user terminal receives a first block including expert reviews written by another user terminal, and generates a second block including expert reviews for the matched experts to broadcast to other user terminals And, the first block and the second block can be recorded on the blockchain.

When the hash operation value of the previous block included in the first block matches the hash operation value of the previous block stored in the blockchain, the one user terminal adds the first block to the blockchain, and the The hash operation value of one block may be included in the second block.

When the matching platform server receives the completion information of the service use contract from the one user terminal or the expert terminal, the matching platform server may transmit the completion information to the one user terminal.

The one user terminal generates and shares the first payment block for transferring the amount of the expert's use from the user's electronic wallet registered in the blockchain system to the escrow electronic wallet, and upon receiving the contract fulfillment completion information, the A second payment block for transferring the use amount from the escrow electronic wallet to the expert electronic wallet can be generated and shared.

The first payment block and the second payment block include an electronic wallet address, an electronic money amount corresponding to the amount of use, an electronic wallet balance and authentication data, and the authentication data includes the first payment block and the second 2 It may include an electronic signature using the secret key of the user terminal that generated the payment block.

According to an embodiment of the present invention, based on expert reputation information, it is possible to reduce an expert search time required by a user and match a highly reliable expert to a customer. In addition, by exposing professional service costs, it is possible to induce comparative competition and provide a service cost reduction effect.

1 is a block diagram of an expert matching system according to an embodiment of the present invention.
2 is a view showing a block chain structure used in an embodiment of the present invention.
3 is a view showing the configuration of a matching platform server according to an embodiment of the present invention.
4 is a view showing the configuration of a user terminal according to an embodiment of the present invention.
5 is a flowchart illustrating an expert matching method according to an embodiment of the present invention.
6 is a flowchart illustrating the operation of a blockchain according to an embodiment of the present invention.
7 is a flowchart illustrating an expert matching method according to another embodiment of the present invention.
8 is a flowchart illustrating an expert matching method according to another embodiment of the present invention.
9 is a block diagram showing a hardware configuration of an expert matching system according to another embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art to which the present invention pertains may easily practice. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. In addition, in order to clearly describe the present invention in the drawings, parts irrelevant to the description are omitted, and like reference numerals are assigned to similar parts throughout the specification.

Throughout the specification, when a part “includes” a certain component, it means that the component may further include other components, not to exclude other components, unless otherwise stated.

In addition, the terms “… unit” and “… module” described in the specification mean a unit that processes at least one function or operation, which may be implemented by hardware or software or a combination of hardware and software.

In this specification, a block chain (blockchain) records continuously increasing data in a block of a specific unit, and each node constituting a peer-to-peer network manages the block as a chain-type data structure. It refers to data itself composed of data management technology or data structures in the form of a chain. At this time, the blockchain data composed of a chain-type data structure is operated in a distributed ledger form at each node without a central system.

Also, a smart contract refers to program code that can execute and execute contracts or negotiations using blockchain technology. Smart contracts can automate or replace legal contracts by automating the entire process by program code. Among the multiple cryptocurrencies, ethereum is a blockchain system that can execute smart contracts and can provide a global platform through EVM (Ethereum Virtual Machine).

1 is a block diagram of an expert matching system according to an embodiment of the present invention.

Referring to FIG. 1, the expert matching system 1 includes a blockchain system 2 consisting of an expert matching platform server 100 and a plurality of user terminals 200.

The plurality of user terminals 200 correspond to a user terminal using an expert service, that is, a user terminal. The user terminal 200 may be a user computer, laptop, tablet, handheld PC, PDA (Personal Digital Assistants), mobile phone, or the like. Hereinafter, the blockchain node and the user terminal refer to the same configuration.

Here, the plurality of user terminals 200 operate as a blockchain node. That is, the plurality of user terminals 200 are connected to each other to form a blockchain network. The plurality of user terminals 200 create a block including content related to the expert matching service, and add the generated block to the blockchain. Such a blockchain is shared between a plurality of user terminals 200.

The plurality of user terminals 200 share Internet protocol (IP) addresses, ports, and protocol information between each blockchain node 200 of each user terminal 200.

The plurality of user terminals 200 perform operations such as block generation, propagation, verification, and recording according to the blockchain algorithm. The plurality of user terminals 200 propagate the blocks on the blockchain network to achieve a distributed agreement. When a decentralized agreement is reached, the block is registered on the blockchain. The propagation of blocks is promised by communication protocols. For example, when a transaction occurs, one user terminal 200 propagates the transaction to the designated eight user terminals 200. Transaction propagation is performed to all user terminals 200 having a blockchain through pyramidal propagation that repeatedly propagates to each of the 8 user terminals 200 designated for each of the 8 user terminals 200 that have received the transaction. Therefore, transactions recorded on the blockchain cannot be forged and altered later.

The plurality of user terminals 200 may manage blocks with a data structure as shown in FIG. 2. Blocks are individual elements that make up the blockchain, and store reference values and electronic document information for previous blocks.

2 shows a blockchain structure to which an embodiment of the present invention is applied.

Referring to FIG. 2, the block 300 includes a block hash 310, a header 320, a transaction count/Ethereum Classic (ETC) 330 and a body 340.

The block hash 310 is name information of the block 300. The block hash 310 includes a version 321 included in the header 320, a previous block hash 322, a Merkle Root 323, a time stamp 324, and a difficulty target (time, bits) 325. , It may be a result value converted to a hash function (eg, SHA256) obtained by adding all of the nonces 326.

The version 321 included in the header 320 is a version of the block 300 and represents an upgraded version of the blockchain software or the protocol used.

The previous block hash 322 included in the header 320 indicates the address value of the previous block before the current block in the blockchain. Therefore, block #1 and block #2 are connected to each other. Therefore, as the blocks are accumulated, forgery and alteration of transactions recorded in the blocks becomes difficult, and reliability of transactions recorded in each block is improved.

The merkle 323 in the header 320 is a hash tree of transactions stored in the body 340 of block 300. Mercut 323 can be used to verify the integrity of transactions that exist within a single block. Merkle root 323 constructs a Merkle tree using all the transactions stored in the block and stores the root value of the tree to verify the integrity of all the transactions the block has, or whether a specific transaction is included in the block You can check whether or not.

The time stamp 324 in the header 320 is a field indicating the creation time of the block, and a value calculated in seconds from a Unix reference date is stored.

The difficulty target 325 in the header 320 and the nonce 326 are used in a process called mining. The difficulty target 325 includes bits that indicate a difficulty hash target value. The nonce 326 is a counter used in proof of work during the block mining process.

Here, when mining is described, mining produces electronic money, verifies the validity of the transaction on the block, and connects the block to the blockchain. In order to perform mining, a large number of miners participate, and among a large number of miners, a coin is obtained through a consensus mechanism, and a miner who creates a block and connects to the blockchain is selected. This consensus mechanism is achieved through Proof Of Work in Bitcoin, and hash cash problem is used as proof of work. As the computing performance improves, the hash cash problem is quickly solved. In this case, the time to solve the hash cash problem can be adjusted by modifying the difficulty target field value.

The transaction count/ETC 330 stores the number of transactions.

The body 340 stores a plurality of transactions. Transactions include expert reviews, payment information based on expert use, and authentication data. Here, the authentication data includes electronic signature data generated according to an electronic signature algorithm using a secret key of a user who has written an expert review or paid an expert usage amount.

Electronic signatures are techniques for verifying that an electronic document has not been falsified or tampered with in its original content (Data origin Authentication) and who is the originator of the signature. Since the electronic signature has a function of proving the data generated by itself to a large number of others, a secret key, ie, a private key, that only the user knows in the signature generation process is used. In addition, since the digital signature must be verifiable by a large number of others, the public key is used in the verification process. According to an embodiment, the authentication data may be a hash calculation value for expert reviews or payment information, which may be encrypted with a private key.

3 is a view showing the configuration of a matching platform server according to an embodiment of the present invention.

Referring to FIG. 3, the matching platform server 100 includes an expert database 101, an expert provider 103, and an escrow broker 105.

The expert database 101 stores a plurality of expert registration information. The plurality of expert registration information may store expert information registered online or offline. Here, the expert may include a lawyer, a tax accountant, an architect, a babysitter, a domestic helper, and the like. The expert information may include a brief identification information of the expert, contact information, and services provided.

The expert providing unit 103 extracts expert information meeting the search requirements from the expert database 101 and provides it to the user terminal 200 according to the expert search request of the user terminal 200. Then, when expert selection information is received from the user terminal 200, matching information is transmitted to the user terminal 200 and the selected expert terminal (not shown). Here, the matching information may include information of the user terminal 200, expert information, and service request condition information of the user terminal 200.

In addition, the expert providing unit 103 generates a smart contract composed of program codes instructing at least one of expert search, expert review writing and sharing, and expert use payment, and transmits it to the blockchain system 2 .

When the escrow broker 105 receives all the completion information of the service use contract from the user terminal 200 and the expert, the transfer completion information is transmitted to the user terminal 200. The escrow account of the service use amount can be an expert matching platform server operator as a depositor.

As described above, the configuration of the user terminal operating as the blockchain node 200 is as shown in FIG. 4.

4 is a view showing the configuration of a user terminal according to an embodiment of the present invention.

Referring to FIG. 4, the user terminal 200 connects to the expert matching platform server 100 by executing an expert matching program, and makes a peer to peer (P2P) connection with a plurality of other user terminals 200.

The user terminal 200 is composed of program codes instructing at least one operation of searching for experts, writing and sharing expert reviews, and paying for using experts, and a smart contract including an access address of the expert matching platform server 100 Can be received from the expert matching platform server 100. The expert matching program of the user terminal 200 may be operated by a smart contract. Each function is described as follows.

The user terminal 200 may include a blockchain database 201, a blockchain processing unit 203, an expert search unit 205, an expert matching unit 207, a payment unit 209, and a late registration unit 211. .

The blockchain database 201 stores a blockchain including expert reviews and a blockchain including electronic wallet information.

The blockchain processing unit 203 connects peer to peer (P2P) with a plurality of different user terminals. The blockchain processing unit 203 generates a new block including the written expert reviews, propagates it on the blockchain network, receives the block broadcast from other user terminals 200 and adds it to the blockchain.

The blockchain processing unit 203 calculates a hash value using expert reviews, a nonce value, a timestamp, and a public key as input information, and calculates the hash value and The input information used to calculate the hash value is transmitted to other user terminals 200.

Blockchain processing unit 203 receives hash values, expert reviews, payment transaction, etc., and other user terminals 200 hashes based on past transactions of user terminals 200 that transmit hash values, etc. Validate values, past transactions. And it adds the verified block to the blockchain.

The blockchain processing unit 203 broadcasts a block including a hash operation value of a previous block stored in the blockchain.

If the hash operation value of the previous block included in the block received from other user terminals matches the hash operation value of the previously stored block, the block processing unit 203 adds the received block to the blockchain.

According to one embodiment, the block includes 1) encrypted expert reviews, payment information, 2) hash values of the previous block, 3) encrypted expert reviews, and payment information.

Here, the blockchain processing unit 203 stores a private key and a public key required for encryption and decryption. The private key and public key form a key pair.

The expert search unit 205 accesses the expert matching platform server 100 and searches for expert information based on information input from the user. Then, a user's review of the expert selected by the user among the searched expert information is obtained from the blockchain database 201. And the reviews of the acquired experts are displayed on the screen.

The expert matching unit 207, when a user input signal for selecting an expert output by the expert searching unit 205 is generated, requests the user's final selected expert information to the expert matching platform server 100 and receives it.

The payment unit 209 requests the blockchain processing unit 203 to generate a first payment block that transfers the amount of the last selected expert's usage from the electronic wallet of the user registered in the blockchain to the escrow electronic wallet. Then, the blockchain processing unit 203 generates the first payment block, broadcasts it to other user terminals 200, and adds it to the blockchain. At this time, the first payment block includes the user's electronic wallet address, escrow electronic wallet address, amount of use, authentication data, and the like.

Upon receiving the completion of the contract fulfillment from the expert matching platform server 100, the payment unit 209 requests the blockchain processing unit 203 to create a second payment block for transferring the use amount from the escrow electronic wallet to the expert electronic wallet. do. Then, the blockchain processing unit 203 generates a second payment block, broadcasts it to other user terminals 200, and adds it to the blockchain. At this time, the second payment block includes an escrow e-wallet address, an expert e-wallet address, amount of use, authentication data, and the like.

At this time, the payment unit 209 checks whether an expert review is written, and when the expert review is written, a discount rate registered in the smart contract may be applied.

According to an embodiment, the payment unit 209 may include the usage amount to which the discount rate is applied in the second payment block. According to another embodiment, the payment unit 209 may create a third block for charging the electronic money corresponding to the reward amount in the user's electronic wallet, add it to the blockchain, and share it.

Based on the configuration described so far, an expert matching method according to an embodiment of the present invention will be described. At this time, the same reference numerals are used for the description of the same components as in FIGS. 1 to 4.

5 is a flowchart illustrating an expert matching method according to an embodiment of the present invention.

Referring to FIG. 5, the matching platform server 100 registers expert information (S101).

The user terminal 200 executes the expert matching program (S103), and accesses the matching platform server 100.

The user terminal 200 transmits an expert information search request to the matching platform server 100 based on the information input from the user (S105).

Matching platform server 100 transmits to the user terminal 200 the expert information that satisfies the search requirements included in the expert search request (S107) among a plurality of registered expert information (S101) (S107).

The user terminal 200 outputs the received expert search result (S109) on the screen (S109). In addition, the user terminal 200 extracts the reviews of the searched experts from the blockchain database 201 (S111) and outputs them to the screen, thereby providing them to the user.

When the user terminal 200 finally selects the expert (S113), the expert selection information is transmitted to the matching platform server 100 (S115).

The matching platform server 100 performs matching between the user terminal 200 and the expert (S117). In this case, the matching may include an operation of providing matching information to the user terminal 200 and the expert terminal (not shown). The matching information may include information of the user terminal 200, information of experts, and service requirement information of the user terminal 200. The information of the user terminal 200 and the information of the expert may include contact information, etc. that can be in contact with each other.

6 is a flowchart illustrating the operation of a blockchain according to an embodiment of the present invention.

Referring to FIG. 6, when an expert review is written, the user terminal 200 generates and shares a block including the expert review (S201) (S203).

The user terminal 200 searches for another user terminal 200 based on a previously shared IP address, port, and protocol, and transmits a block to the discovered user terminal 200.

The user terminal 200 calculates the hash value using the expert user reviews, nonce value, timestamp, public key, etc. as input information, and calculates the hash value and The input information used to calculate the hash value is transmitted to another user terminal 200 (S205).

Another user terminal 200 that receives inputs such as a hash value and expert reviews verifies the validity of the hash values and blocks based on past expert reviews of the user terminal 200 that has transmitted the hash values and the like (S207) ). The validated block is added to the blockchain (S209).

At this time, the user terminal 200 broadcasts a block including the hash operation value of the previous block stored in the blockchain. When the broadcasted block is received, if the previous hash operation value of the received block matches the hash operation value of the previously stored block, the received block is added to the blockchain.

Steps S201 to S209 described above have described the expert review block, but the blockchain operation for the payment block is also the same.

7 is a flowchart illustrating an expert matching method according to another embodiment of the present invention.

Referring to FIG. 7, the user terminal 200 creates and shares the first payment block for transferring the amount of the last selected expert's use from the electronic wallet of the user registered in the blockchain to the electronic wallet in escrow (S301) and shares it in the blockchain. Register (S303).

Matching platform server 100 determines whether the contract is completed (S305). At this time, upon receiving the completion information of the service use contract from the user terminal 200 or the expert, it may be determined that the contract is completed.

The matching platform server 100 transmits the fulfillment completion information to the user terminal 200 when the contract fulfillment is completed (S307).

The user terminal 200 creates and shares a second payment block that transfers the amount of the expert's use from the escrow electronic wallet to the expert's electronic wallet (S309) and registers it on the blockchain (S311).

When the user terminal 200 registers for expert reviews, the user terminal 200 creates and shares a third payment block for charging the electronic money corresponding to the reward amount registered in the smart contract to the user's electronic wallet (S313) and registers it on the blockchain (S315).

At this time, S303, S311, and S315 include steps S205 and S207 described in FIG. 6. That is, the second payment block may be registered in the blockchain when the hash operation value of the first payment block is included as the previous hash operation value. And the third payment block can be registered in the blockchain when the hash operation value of the second payment block is included as the previous hash operation value.

8 is a flowchart illustrating an expert matching method according to another embodiment of the present invention.

Referring to FIG. 8, the matching platform server 100 generates a smart contract based on expert matching operation information (S401) and transmits it to the blockchain system 2 (S403).

The user terminal 200 executes an expert matching program (S405) and executes an expert matching operation based on the received smart contract (S403) (S407). Here, the smart contract includes instruction information regarding the operation of the user terminal 200 described with reference to FIGS. 1 to 7.

Meanwhile, FIG. 9 is a block diagram showing the hardware configuration of the expert matching system according to another embodiment of the present invention, and shows the hardware configuration of FIGS. 1 to 8.

Referring to FIG. 9, the expert matching system 400 includes a communication device 401, a memory 403, a storage device 405, and at least one processor 407.

The communication device 401 is connected to at least one processor 407 to transmit and/or receive data through a communication network (not shown). The memory 403 is connected to the at least one processor 407 and stores a program including instructions to execute a configuration and/or method according to the embodiments described with reference to FIGS. 1 to 8. The program implements the present invention in combination with hardware such as memory 403 and at least one processor 407.

The storage device 405 includes information necessary for the operation of the expert matching system 400. The processor 407 executes the present invention in combination with hardware such as the memory 403 and the storage device 405.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concept of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

Claims (17)

As an expert matching method of a user terminal operated by at least one processor,
Receiving blocks including expert reviews from other user terminals and adding them to the blockchain,
Accessing the expert matching platform server and searching for expert information based on the information input from the user,
Obtaining reviews of experts selected by the user from the retrieved expert information from the blockchain, and
Requesting and receiving the information of the expert selected by the user to the expert matching platform server
Including, expert matching method. In claim 1,
Before the adding step,
Running an expert matching program to access the expert matching platform server, and connecting a plurality of different user terminals to peer to peer (P2P)
Further comprising, expert matching method. In claim 2,
The expert matching program,
Smart contract received from the expert matching platform server
Containing
How to match experts. In claim 3,
The smart contract,
The expert matching method is composed of program codes instructing at least one operation of searching for experts, writing and sharing expert reviews, and paying for using experts, and includes an access address of the expert matching platform server. In claim 1,
After the receiving step,
Generating a first payment block for transferring the last selected expert's usage amount from the electronic wallet of the user registered in the blockchain to the escrow electronic wallet,
Broadcasting the first payment block to other user terminals,
Receiving a contract fulfillment completion from the expert matching platform server,
Generating a second payment block for transferring the amount of use from the escrow electronic wallet to an expert electronic wallet; and
Broadcasting the second payment block to other user terminals
Further comprising, expert matching method. In claim 5,
The cost of using the expert is
The expert matching method, where discounts are applied according to whether expert reviews are written or not. In claim 5,
After the step of receiving the completion of the contract,
Steps to write an expert review, and
Creating a block containing the expert review, broadcasting it to other user terminals, and adding it to the blockchain
Further comprising, expert matching method. In claim 7,
The expert reviews above,
The expert matching method, wherein the expert key is encrypted with the user's private key and the user's public key is written. In claim 7,
Broadcasting to the other user terminals, and the step of adding to the blockchain,
Broadcasting a block including a hash operation value of a previous block stored in the blockchain, and
If the hash operation value of the previous block included in the broadcast block matches the hash operation value of the previous block stored in other user terminals, adding the broadcast block to the blockchain
Including, expert matching method. Blockchain system that consists of a plurality of user terminals that share a block, records a blockchain that contains expert reviews, and
An expert search request is received from one user terminal among the plurality of user terminals, and expert information corresponding to a search requirement included in the expert search request is transmitted from the plurality of expert information to the one user terminal. When the expert selection information is received from the user terminal of the user, the expert matching platform server transmits matching information to the one user terminal and the selected expert terminal.
Including, expert matching system. In claim 10,
The matching information,
An expert matching system including information on the user terminal, information on the expert, and service requirement information on the user terminal. In claim 10,
The matching platform server,
An expert matching system that generates and transmits a smart contract consisting of program codes instructing at least one of expert search, expert review writing and sharing, and payment of expert use fee to the blockchain system. In claim 12,
The one user terminal,
Receiving a first block including expert reviews written in another user terminal, and generating a second block including expert reviews for the matched experts to broadcast to other user terminals,
Expert matching system that records the first block and the second block on a blockchain. In claim 13,
The one user terminal,
If the hash operation value of the previous block included in the first block matches the hash operation value of the previous block stored in the blockchain, the first block is added to the blockchain,
Expert matching method, including the hash operation value of the first block in the second block. In claim 10,
The matching platform server,
Upon receiving the fulfillment completion information of the service use contract from the one user terminal or the expert terminal, transmitting the fulfillment completion information to the one user terminal
How to match experts. In claim 15,
The one user terminal,
Create and share the first payment block that transfers the amount of the expert's usage from the user's electronic wallet registered in the blockchain system to the escrow electronic wallet,
Upon receiving the contract fulfillment completion information, the expert matching system for generating and sharing a second payment block for transferring the amount of use from the escrow electronic wallet to the expert electronic wallet. In claim 16,
The first payment block and the second payment block,
The electronic wallet address, the amount of electronic money corresponding to the amount used, the balance of the electronic wallet and authentication data,
The authentication data,
And an electronic signature using a secret key of the user terminal that generated the first payment block and the second payment block.

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