KR102645446B1 - O2o based system and method for intermediating private investigation agent using blockchain - Google Patents

Abstract

The present invention discloses an O2O-based detective brokerage system using blockchain. More specifically, the present invention relates to an O2O-based detective brokerage system and method using blockchain that intermediaries between a client and a detective so that the client can secretly request and handle a private case to the detective online.
According to an embodiment of the present invention, illegal misuse of private investigations can be prevented by performing a registration process if the registration criteria are met through DID identity authentication for the client and detective, and the client who wishes to request a private investigation case When a case is requested using one's own terminal, one or more registered detectives are connected to each other, and the contents of the request are discussed and a conversation about the progress of the case is held through a chat room between the client's terminal and the detective's terminal, but the contents of the chat room are shared with the client. By storing it only in the terminal and discarding it after the case is over, it has the effect of preventing the leakage of the client's information and case details not only by the system operator but also by the detective.

Description

O2O-based detective brokerage system and method using blockchain {O2O BASED SYSTEM AND METHOD FOR INTERMEDIATING PRIVATE INVESTIGATION AGENT USING BLOCKCHAIN}

The present invention relates to an O2O-based detective brokerage system using blockchain. In particular, an O2O-based detective system using blockchain that mediates between a client and a detective so that a client can secretly request and handle a private case to a private detective online. It relates to brokerage systems and methods.

A detective is a world where unforeseen events and accidents occur in daily life as the current society develops highly and changes into the information age. In particular, in the case of crime, various civil and criminal cases that occur in daily life are diversified, intellectualized, and wide-ranging. It refers to a private investigator who carries out investigative work such as collecting information on individuals or companies, collecting data, and confirming facts to the extent permitted by current law in areas of an accident that cannot be covered by public authority.

As a prior art document related to this, Publication Patent No. 10-2017-0138909 includes the steps of entering request information for a private investigation through an interface, the step of selecting a request method for a private investigation, and the request information and request method. Transmitting a survey request request to a mediation server, displaying bid information of at least one survey company that bid on the private survey request request, and selecting any one survey company from among the at least one survey company; , a direct request method in which the customer terminal requests a private investigation to the selected investigation company, and a request agency method in which the customer terminal delegates the request for the private investigation to a brokerage company, and the brokerage company requests the private investigation to the selected investigation company. The content provided is disclosed.

According to the above-mentioned prior art literature, a private investigation brokerage service that provides an optimized interface for requesting a private investigation and provides cost information for each case to the customer terminal by bidding on the cost of the requested case to a private investigation company. You can expect effects that can provide.

However, the above-mentioned prior art document only suggests a means of providing a 'safe number' that changes the customer's phone number to another number in order to prevent exposure of the customer's personal information and leakage of request details. , there is a limitation in that it cannot provide separate means of preventing leakage of all information, from the personal information of the client who requested the case to the specific details of the request.

In addition, even if the client has a criminal record such as stalking, violence, or kidnapping, there is a possibility that private investigations can be abused because the client's criminal history cannot be confirmed in advance.

The contents of the request of the client requesting a private investigation may be private and may include contents that are highly sensitive to individuals and related parties, and confidentiality of such contents must be maintained, and the present invention fundamentally prevents this information leakage problem. We want to provide the technical means to do this.

Public Patent Publication No. 10-2017-0138909 (Publication date: 2017.12.18.)

The present invention was created to solve the above-mentioned problems. The present invention connects to an intermediate server through a blockchain DApp (Decentralized App) for the requester that runs on the requester terminal, such as a smartphone owned by the requester, to establish a public blockchain. Once the client registration is decided by requesting DID (Decentralized ID) identity authentication based on the request, the case is requested, and a conversation is conducted through a communication session with the matched detective terminal to discuss and report on the progress of the case. , there is a challenge in providing an O2O-based detective brokerage system and method using blockchain that includes a client terminal that discards all information related to the request upon completion of the case.

In order to provide the above-described tasks, the O2O-based detective brokerage system using blockchain according to a preferred embodiment of the present invention registers as a client through a blockchain DApp (Decentralized App) for clients, requests receipt of a case, and By opening a chat room through a chat session, the client terminal provides a conversation function about the contents of the request and the progress of the case with the detective in the chat room, registers as a detective through the blockchain DApp for detectives, and connects with the client terminal through the chat session. A detective terminal, a plurality of private blockchain nodes, and a blockchain DApp for the client or detective are provided to the client terminal or detective terminal that provide a conversation function about the request content and case progress with the client in the chat room, and Performing a registration procedure in response to a registration request from a client terminal and a detective terminal, receiving a case requested from the client terminal, matching a client of a registered case with a registered detective to generate connection information, and It includes a mediation server that distributes connection information to the client terminal and the detective terminal, and the client terminal invites the matched detective terminal to a chat room opened through the blockchain DApp for the client to conduct a conversation, and when the chat room ends, The conversation content and transmitted and received data of the chat room are stored in storage, and when a conversation session is created and the chat room is re-run after the chat room is terminated, the conversation content stored in the storage is loaded into the chat room and transmitted to the detective terminal to be synchronized. When the chat room is closed after the chat room is opened through the detective blockchain DApp, the detective terminal automatically deletes all conversations that have taken place to date in the chat room, and the client blockchain DApp is connected to the information and communication network. After connecting to the mediation server, a terminal communication unit that performs data communication with the plurality of private blockchain nodes, or a detective terminal, and the mediation server, the request information input by the requester is transmitted to the mediation server to request a case. A request requesting unit for requesting a request, a session creation unit for creating a chat session with the detective terminal for a chat network based on the connection information, and opening a chat room linked to the chat session, where the requester inputs in the chat room. It includes a chat room processing unit that shares content and content input to the detective terminal through a chat session, wherein the chat room processing unit opens a chat room according to the creation of the chat session and processes a conversation function with the detective terminal in the chat room. A chat room opening module, a storage that stores all conversation content and transmitted and received data that occurred in the chat room, and when the detective terminal reconnects through the conversation session, the conversation content of the chat room stored in the storage through a restoration session created by the session creation unit. It may include a conversation restoration module that restores previous conversation content in the chat room of the detective terminal by transmitting a conversation and a chat room disposal module that deletes all conversation content and data stored in the storage upon normal completion of the incident.

The mediation server is a server communication unit that performs data communication with the plurality of private blockchain nodes, public blockchain, one or more client terminals, or detective terminals through an information and communication network, and prepayment or deposit of fees for requested cases. A cost processing department that processes the procedures for the request, a request reception department that receives the request for the case requested from the client terminal, and upon completion of prepayment or deposit of the cost, receives request information for the case and registers it in the case database; According to the request information, a case matching unit matches one of a plurality of detectives registered in the detective database to the request, and connection information is generated to connect the matched client terminal and detective terminal to the client terminal and detective terminal. It may include a connection information generation unit to distribute, and all data transmitted and received in the chat room of the blockchain DApp for the requester and the blockchain DApp for the detective may be end-to-end encrypted.

The mediation server receives requests for client registration from multiple client terminals, performs DID (Decentralized ID) identity authentication based on a public blockchain, and provides proof information (VP: Verifiable Presentation) related to criminal records received from the client terminals. Based on this, the client's criminal history, crime type, sentence type, and sentence period are evaluated according to preset standards to determine whether or not to register the client, and for the client whose registration has been decided, client information is registered in the client database, and the client is Requests for detective registration are received from a plurality of detective terminals and a client management unit that stores the DID and hash values of information in the plurality of private blockchain nodes, performs DID identity authentication based on the public blockchain, and collects the received detective information and information. Comprising a detective management unit that compares set detective registration requirements, registers detective information for detectives that meet the criteria in the detective database, and stores the DID and hash value of the detective information in the plurality of private blockchain nodes, The cost processing department may process payment procedures to the detective for costs excluding a certain rate of commission for the advance payment or deposit paid at the time of filing for the case when the ongoing case is normally completed.

The chat room opening module deletes some or all of the conversation contents included in the activated chat room and the chat room stored in the storage, according to the requester's selection, and the session creation unit executes a storage process created or running in the detective terminal. Create a detection session for detection, the blockchain DApp for the requester detects the storage process through the detection session, and commands related to saving, capturing, or transmitting the screen of the detective terminal while the chat room is activated. If execution of is detected, it may further include a suspicious activity detection unit that requests the chat room processing unit to force termination of the chat room.

In addition, the O2O-based detective mediation method using blockchain according to an embodiment of another aspect of the present invention to solve the above-described problem is one in which the mediation server is requested to receive a request for a case requested from a client terminal through an information and communication network. Step, the mediation server processes procedures for prepayment of fees or deposit for the requested case, once the prepayment of fees or deposit for the requested case is completed, the mediation server requests the case A step of receiving information and registering it in a case database, matching the mediation server with one of a plurality of detectives registered in the detective database according to the request information to the request, a client terminal to which the mediation server is matched, and Generating connection information connecting detective terminals to each other and distributing it to the client terminal and the detective terminal, wherein the client terminal and the detective terminal identify each other in response to the connection information, create a conversation session, and connect to each other. Step, the client terminal opens a chat room, invites the detective terminal, and performs a conversation with each other in the chat room. When the chat room is terminated, the client terminal stores the conversation content and transmitted and received data in the chat room in storage. When one of the requester terminal and the detective terminal creates a conversation session and runs a chat room, the requester terminal creates a restoration session, loads the conversation content stored in the storage into the chat room, and transmits it to the detective terminal to synchronize it. May include steps.

Before the step in which the mediation server is requested to receive a request for a case requested from a client terminal through an information and communication network, a step in which the mediation server receives a request for detective registration from a plurality of detective terminals, the mediation server is based on a public blockchain A step of performing DID (Decentralized ID) identity authentication, comparing the detective information received by the mediation server with preset detective registration requirements, registering detective information in the detective database for detectives that meet the criteria, and registering the detective information in the detective database. It may include storing the DID and hash value of the information in a plurality of private blockchain nodes.

Before the step in which the mediation server is requested to receive a request for a case requested from a client terminal through an information and communication network, a step in which the mediation server receives a request for client registration from a plurality of client terminals, the mediation server is based on a public blockchain The step of performing DID (Decentralized ID) identity authentication, based on the criminal history-related proof information (VP: Verifiable Presentation) received from the client terminal, the client's criminal history, crime type, sentence type, and sentence period are determined. A step of evaluating whether to register a client by evaluating according to preset standards, registering client information in the client database for the client whose registration has been decided, and storing the DID and hash value of the client information in the plurality of private blockchain nodes. May include steps.

When one of the requester terminal and the detective terminal creates a conversation session and runs a chat room, the requester terminal creates a restoration session, loads the conversation content stored in the storage into the chat room, and transmits it to the detective terminal to synchronize, Upon normal completion of an ongoing case, the mediation server may include a step of processing payment procedures to the detective for costs excluding a commission of a certain rate with respect to the prepayment or deposit paid at the time of filing for the case.

After the requester terminal opens a chat room, invites the detective terminal, and conducts a conversation with each other in the chat room, some of the conversation contents included in the activated chat room and the chat room stored in the storage are selected according to the requester's selection. Alternatively, it may include the step of deleting everything.

The step of the client terminal and the detective terminal identifying each other in response to the connection information, creating a conversation session, and connecting to each other includes the step of the client terminal detecting a storage process created or running in the detective terminal. A step of creating a session, the requester terminal detecting the storage process through the detection session, and the requester terminal of a command related to saving, capturing or transmitting the screen of the detective terminal while the chat room is activated. If execution is detected, the step of forcibly terminating the chat room may be further included.

According to an embodiment of the present invention, DID identity authentication is performed on the client and detective who wish to request and undertake a private investigation case, and if the registration criteria are met, the registration process is performed, and the client requests the case using his or her terminal. In this case, one or more registered private investigators are connected to each other, and the contents of the request are discussed and a conversation about the progress of the case is held through a chat room between the client terminal and the detective terminal. However, the contents of the chat room are stored only in the client terminal and discarded after the case is completed. This has the effect of preventing the leakage of the client's information and case details not only by the system operator but also by the detective.

Additionally, by applying registration standards for clients or detectives and performing DID identity authentication, there is an effect of preventing private investigations from being misused illegally.

Figure 1 is a diagram schematically showing the overall structure of an O2O-based detective brokerage system using blockchain according to an embodiment of the present invention.
Figure 2 is a diagram showing the structure of a client terminal of an O2O-based detective brokerage system using blockchain according to an embodiment of the present invention.
Figure 3 is a diagram showing the structure of the mediation server of the O2O-based detective mediation system using blockchain according to an embodiment of the present invention.
Figure 4 is a diagram showing the connection method of the requester terminal and the detective terminal of the O2O-based detective brokerage system using blockchain according to an embodiment of the present invention.
Figure 5 is a sequence diagram showing the brokerage method of the O2O-based detective brokerage system using blockchain according to an embodiment of the present invention.
Figure 6 is a diagram illustrating a screen provided to a client terminal of an O2O-based detective brokerage system using blockchain according to an embodiment of the present invention.

Throughout the specification, when a part is said to be “equipped with” or “includes” a certain element, this means that it may further include other elements rather than excluding other elements, unless specifically stated to the contrary. In addition, terms such as "...Unit", "...Server", and "...System" used in the specification refer to a unit that processes one or more functions or operations. This means that it can be implemented through hardware, software, or a combination of hardware and software.

Also, in this specification, the term "example" means serving as an example, example, or illustration, but the subject matter of the invention is not limited by such examples. In addition, "comprising", "comprising", "having" and other similar terms are used, but when used in the claims, "including" is an open transition word that does not exclude any additional or other elements. It can be used generically in a similar way to the term “comprising.”

The various techniques described herein may be implemented with hardware or software, or a combination of both as appropriate. As used in this specification, terms such as "...Unit", "...Server", and "...System" also refer to computer-related entities, that is, hardware. , it can be treated as a combination of hardware and software, equivalent to software or software at execution time. Additionally, each function executed in the program of the present invention may be configured in module units and may be recorded in one physical memory, or may be distributed and recorded between two or more memories and recording media.

In the following description, the term “O2O-based detective brokerage system using blockchain” may be abbreviated as “system” for convenience of explanation.

In the following description, the term “Blockchain DApp (Decentralized App)” may be abbreviated as “Application” for convenience of explanation.

Hereinafter, an O2O-based detective brokerage system and method using blockchain according to an embodiment of the present invention will be described with reference to the drawings.

Figure 1 is a diagram schematically showing the overall structure of an O2O-based detective brokerage system using blockchain according to an embodiment of the present invention.

Referring to Figure 1, the O2O-based detective brokerage system using blockchain according to an embodiment of the present invention registers as a client through a blockchain DApp (Decentralized App) for clients, requests receipt of a case, and conducts a conversation session. By opening a chat room through the chat room, the client terminal (100) provides a conversation function about the contents of the request and the progress of the case with the detective in the chat room, registers as a detective through the blockchain DApp for detectives, and communicates with the client terminal (100) through a chat session. A detective terminal (200) that is connected and provides a conversation function about the request content and case progress with the client in a chat room, a plurality of private blockchain nodes (400), and a client terminal (100) through a blockchain DApp for the client or detective. ) and perform a registration procedure in response to a registration request from the detective terminal 200, receive a case requested from the client terminal 100, and match the client of the registered case with any registered detective to provide connection information. It may include a mediation server 300 that generates and distributes the connection information to the requester terminal 100 and the detective terminal 200.

The client terminal 100 may be a terminal device that a client who wishes to request private information to a detective in a confidential manner installs, possesses, and uses a blockchain DApp for the client.

Here, a blockchain DApp (Decentralized App) refers to a decentralized application written based on a blockchain, and a smart contract is a contract that automatically carries out when predetermined conditions are achieved on the blockchain. Various functions can be performed using software code.

Here, a private blockchain is a blockchain composed only of authorized nodes, unlike a public blockchain in which all data on the blockchain is made public. Representative examples include private blockchain technologies such as Hyperledger Fabric and Quorum. exist. Since this invention deals with sensitive information, it is decided to utilize a private blockchain.

However, the O2O-based detective brokerage system using the blockchain of the present invention can perform DID identity authentication based on a public blockchain during the process of registering a client or detective.

DID stands for Decentralized Identity, meaning a globally unique identifier that does not require registration with a centralized registration agency because it is registered in distributed ledger technology or another form of decentralized network. do. Unlike existing identification methods, it is not controlled by a central system and allows individuals to have complete control over their own information. This is made possible by configuring identity information to be verifiable through blockchain.

Because the DID document does not contain personal information to prove identity, it can be stored in a public space such as a blockchain. The DID document includes an ID that explains where the DID document is located, a list of public keys related to the ID, and authentication information that proves ownership of the ID. Information related to actual identity is included in Verifiable Credential (VC). This verifiable qualification (VC) includes information such as issuer information (ID, name, etc.), qualification information (identity-related information such as name, age, degree, parental relationship, etc.), and issuer signature (issuer's signature to prove issuance information). may include. These verifiable qualifications (VC) can be received from various issuing organizations (Issuers), and can be issued by dividing identity information into multiple VCs. Since they contain sensitive personal information, they are encrypted in the user's (Holder) personal storage. It can be saved as .

Verifiable Presentation means collecting only the information you want to prove without directly submitting your verifiable qualifications (VC) when proving your identity. For example, if you want to prove only your age, you can only submit a verifiable qualification (VC) that includes age information. Therefore, among the plurality of VCs owned by an individual, it is possible to provide Verifiable Presentation (VP), which is a collection of VCs that have specific information related to the identity required by the verifier. The verifier can confirm the identity of the submitter by verifying the signature of the submitter (signature using a private key) and the signatures of the VCs included in the proof information (VP).

The mediation server 300 according to an embodiment of the present invention can perform DID identity authentication by receiving criminal history-related verification information (VP: Verifiable Presentation) from the client terminal. In addition, based on the criminal history-related proof (VP: Verifiable Presentation) information, it is possible to determine whether to register the client by evaluating the client's criminal history, crime type, sentence type, and sentence period according to preset standards. The reason why criminal record-related proof information (VP) is requested when performing DID identity authentication like this is because it is unknown whether the client is requesting an investigation for the purpose of committing a crime such as stalking, kidnapping, sex crime, or murder. The purpose is to determine in advance whether it is okay to register as a client by checking the existing criminal history of the person wishing to register.

The client terminal 100, whose client registration has been determined through this client registration process, connects to the mediation server 300 through an information and communication network, uploads request information including rough request conditions and contents, and registers the request in the system. Afterwards, a one-on-one chat room can be opened with the detective terminal 200 of the detective matched by the mediation server 300 to consult with the detective about specific requests and receive reports of the results at any time after the start of the investigation.

The mediation server 300 according to an embodiment of the present invention can perform DID identity authentication for registration of a detective terminal. To this end, the detective information received during DID identity authentication can be compared with the preset detective registration requirements to register a detective who satisfies the standards.

The detective terminal 200 may be a terminal operated by one or more detectives who wish to accept a request through the system of the present invention. In the present invention, a detective registered in the system may be an individual or a company that complies with relevant laws and regulations and is normally registered with the association, and is connected to the client terminal 100 through a chat room at the request of the mediation server 300 to conduct the investigation. Reporting of results, etc. can be performed.

Here, a blockchain DApp for clients or detectives distributed by the system may be installed in the client terminal 100 and the detective terminal 200, respectively, and a chat room will be created and managed by the blockchain DApp for clients or detectives. You can.

The above-described client terminal 100 and detective terminal 200 include Personal Communication System (PCS), Global System for Mobile communications (GSM), Personal Digital Cellular (PDC), Personal Handyphone System (PHS), and Personal Digital Assistant (PDA). , IMT (International Mobile Telecommunication)-2000, CDMA (Code Division Multiple Access)-2000, W-CDMA (W-Code Division Multiple Access), Wibro (Wireless Broadband Internet) terminal, smartphone, smartpad ), all types of handheld-based mobile terminal devices such as tablet PCs, and computing devices such as stationary PCs and laptops can be used.

The mediation server 300 is a server device that mediates between a plurality of clients who want to request a case and a plurality of detectives who want to take over the case through an information and communication network.

In detail, the mediation server 300 distributes a blockchain DApp for clients or detectives to each terminal, receives a request for client registration from the client terminal that wishes to request a private investigation through execution of the blockchain DApp for clients, DID (Decentralized ID) identity authentication is performed based on the public blockchain (500), and the client's criminal history, crime type, and sentence type are performed based on criminal history-related proof information (VP: Verifiable Presentation) received from the client terminal. and the type period are evaluated according to preset standards to determine whether to register the requester, register the requester information for the requester whose registration has been decided in the requester database, and send the DID and hash value of the requester information to a plurality of private blockchain nodes (400) ), receive and register requests, and receive detective registration from detective terminals that wish to accept registered requests through the execution of the blockchain DApp for clients, and DID (DID) based on the public blockchain (500) Decentralized ID) performs identity authentication, compares the received detective information with the preset detective registration requirements, registers the detective information in the detective database for detectives who meet the criteria, and sends the DID and hash value of the detective information to multiple private It is stored in the blockchain node 400 and serves to connect the two by matching one request with one detective.

A plurality of private blockchain nodes 400 store the DID and hash values of the client information and detective information received from the mediation server 300, and the client terminal 100 or detective terminal 200 creates a block for the client or detective. Each time a chain DApp is executed, it performs authentication by determining whether the DID and hash value match the stored DID and hash value.

In other words, in the process of registering as a client or detective, public blockchain-based DID identity authentication is performed, but after registration is decided, each time a blockchain DApp is executed, the DID and hash values stored in multiple private blockchain nodes (400) are verified. Authentication is performed by determining whether there is a match.

The above-mentioned information and communication networks include long-term evolution (LTE), LTE Advance (LTE-A), code division multiple access (CDMA), wideband CDMA (WCDMA), universal mobile telecommunications system (UMTS), and wireless broadband (WiBro). , or GSM (Global System for Mobile Communications), etc., can be used.

In particular, the mediation server 300 according to an embodiment of the present invention does not perform any action for management or mediation until the case is completed after mediation between the client and the detective, and provides case-related information other than the minimum information for operation. It is characterized by not creating or storing. This means that in the process of registering a client and a detective, the mediation server 300 performs DID identity authentication based on a public blockchain, processes registration only for those that meet the registration requirements of the client and detective, and processes the registered client and detective. The detective's information is registered in the database, but the client information and detective information are stored in a plurality of private blockchain nodes (400) so that DID identity authentication can be performed each time the client and detective run the client or detective blockchain DApp, respectively. By storing the DID and hash value of the case and processing the case using the blockchain DApp for the requester or detective on the two terminals respectively to avoid directly processing the requester and case-related data, hacking or other unpredictable information Leakage problems can be prevented at the source.

In other words, the mediation server 300 collects only the information necessary to mediate the client terminal 100 and the detective terminal 200, that is, information directly related to the case or necessary to connect the two terminals and process cost-related parts. and is not stored, and information directly related to the incident is used only on two terminals, thereby maximizing the effect of preventing leakage of the client's identity and information.

According to the above-described structure, the detective brokerage system according to an embodiment of the present invention allows a client who wishes to request a personal case to register as a client by installing and using the blockchain DApp for clients on his or her terminal, and then registering the request. , the mediation server matches multiple already registered detectives and connects the client and detective to provide one-on-one consultation and process requests. After matching, reports on requests are processed in a chat room where the client and detective are connected one-on-one. By doing so, no separate information related to the case is stored in the mediation server, and since opinions and reports related to the case are shared only through the chat room between the client terminal and the detective terminal, the possibility of leakage to the outside is significantly lowered.

Hereinafter, the client terminal of the O2O-based detective brokerage system using blockchain according to an embodiment of the present invention will be described in detail with reference to the drawings.

Figure 2 is a diagram showing the structure of a client terminal of an O2O-based detective brokerage system using blockchain according to an embodiment of the present invention.

In the following description, the requester terminal and each component part thereof may be implemented in the form of an application program executable by a known microprocessor, and may be recorded on a readable and writable recording medium and mounted on the terminal device.

Referring to Figure 2, the client terminal 100 of the O2O-based detective brokerage system using blockchain according to an embodiment of the present invention is a public blockchain, a plurality of private blockchain nodes, a brokerage server, or a detective terminal through an information and communication network. and a terminal communication unit 110 that performs data communication, a request request unit 120 that transmits request information input by the requester to the mediation server to request a case request after connecting to the mediation server, based on the connection information. A session creation unit 130 that creates a conversation session with the detective terminal for a chat network, opens a chat room linked to the chat session, and records the contents entered by the requester in the chat room and the contents entered into the detective terminal through the chat session. It may include a shared chat room processing unit 140.

The terminal communication unit 110 is connected to a mediation server, a plurality of private blockchain nodes 400, a public blockchain 500, or a matched detective terminal through an information and communication network to perform data communication to use the mediation service of the present invention. Various data can be transmitted and received.

The request request unit 120 can connect to the mediation server according to the requester's input, receive request information to be requested, register it with the mediation server, and request a case request. Here, the request information excludes the client's identity and specific request details, and may only include rough information such as the desired consultation date, approximate request cost, and consultation field. In particular, it is desirable that information that could identify the requester is omitted from the request information, but may include a phone number, IP or MAC address for communication with the requester terminal.

The session creation unit 130 registers the request requested by the client terminal in the mediation server, matches it with a detective registered with the mediation server according to the request information, and distributes connection information to both terminals to enable communication with the detective. You can create one or more communication sessions for

In particular, the session creation unit 130 according to an embodiment of the present invention can create, in addition to one conversation session for the chat room, a restoration session to restore previous conversation content on the terminal during the investigation period upon reconnection. This means that when the chat room is terminated, the content is stored in the storage 147 of the requester terminal 100, but not in the detective terminal, so that it is not difficult to understand each other when the conversation is resumed, and at the same time, after the conversation ends, the conversation content is stored on the detective side. This is to block the possibility of leakage to the outside world.

In addition, the chat room processing unit 140 opens a chat room according to the connection of the chat session and invites the detective terminal so that the client and the detective can share the details of the consultation and investigation progress regarding the specific case.

As a configuration for this, the chat room processing unit 140 may include a chat room opening module 141, a chat restoration module 143, a chat room disposal module 145, and a storage 147.

The chat room opening module 141 opens a chat room according to the creation of a chat session and processes the conversation function with the detective terminal in the chat room. The client terminal 100 and the detective terminal are connected through a communication session and open the chat room. This allows the client and detective to participate. These chat rooms can provide functions such as sending and receiving known conversations, file transfer, and data calls.

The chat room opening module 141 can be executed by requesting a data call from the other party in the chat room, if necessary, depending on the selection of the client or detective. In this way, the data call function provided by the chat room opening module 141 provides an additional means of conversation for communication that may be insufficient through text or files, but does not require each other's contact information, so it can prevent the risk of personal information being exposed. there is.

In addition, the chat room opening module 141 may, at the request of the requester, unilaterally delete some or all of the conversation content included in the active chat room and the chat room stored in the storage in order to protect the client's personal information or other information. there is.

When the detective terminal is reconnected through a conversation session, the conversation restoration module 143 transmits the conversation content of the chat room stored in the storage 147 to restore the previous conversation content in the detective terminal's chat room.

In detail, after opening a chat room, if the current conversation is terminated and the communication session is closed, the application of the detective terminal can automatically delete all conversation contents that have been conducted to date in the chat room. This is a function to fundamentally block the leakage of request-related information from the detective side. Until the chat room is reopened, the detective terminal does not maintain any information other than the connection information for the requester terminal, so if the requester is out of contact for a long period of time, Even if something like this happens, at least detectives will not be able to obtain or leak any information about the requested information.

In addition, when the chat room is later reopened, all previous conversation contents are restored from the client's terminal through a restoration session, so there is no particular difficulty for the detective to check the contents of the previous conversation and proceed with the subsequent case processing. In other words, in the present invention, through the restoration session, which is the second communication session, the detective feels as if he is continuing the previous conversation, but in reality, the conversation is restored through the client terminal every time the conversation starts, and the conversation continues. do.

The chat room disposal module 145 deletes all conversation contents and data stored in the storage 147 when the incident is normally completed. As the incident ends, the chat room disposal module 145 is used to minimize the possibility of subsequent leakage of request information, conversation contents, etc. You can delete data stored in (147). Here, the scope of data deletion, retention period, etc. can be adjusted according to the user's intention.

The storage 147 stores all conversation content and transmitted and received data that occurred in the chat room. By storing conversation content and attached files in the chat room until the incident is completed, at the request of the requestor, the requester terminal 100 stores the storage ( 147), you can check the details of the request and the progress of the investigation when necessary by loading the saved data. In addition, the storage 147 can provide the conversation contents stored to date to the detective terminal when the chat room is resumed under the control of the conversation restoration module 143.

Meanwhile, as described above, the session creation unit 130 in the requester terminal 100 can further create a restoration session to detect the storage process created or running on the detective terminal, and the requester terminal 100 can also perform restoration. Through the session, the storage process running on the detective terminal can be detected, and if the execution of a command related to saving, capturing, or transmitting the screen of the detective terminal while the chat room is active is detected, the chat room is forced to be terminated by the chat room processing unit. It may further include a suspicious activity detection unit 150 that requests.

This suspicious activity detection unit 150 is designed to prevent unintentional information leakage due to information leakage attempts or hacking that may occur in the detective terminal. The requester terminal 100 creates a detection session, and through this, the detective Among the processes running on the detective terminal through the terminal application, the execution of processes that can be exploited for data leakage, such as screen capture and data storage, is monitored, and if a command related to this is executed, the chat room is forcibly terminated, thereby protecting the detective terminal side. Automatically deletes data and prevents future actions such as saving conversation content from being performed.

Additionally, the suspicious activity detection unit 150 acquires control rights to the front camera of the detective terminal while running the application of the detective terminal, and when a separate camera is detected, the suspicious activity detection unit 150 can automatically delete data on the detective terminal side by forcibly terminating the chat room. there is. In this way, information leakage through a third camera can also be prevented through the front camera of the detective terminal.

Hereinafter, the mediation server of the O2O-based detective mediation system using blockchain according to an embodiment of the present invention will be described in detail with reference to the drawings.

Figure 3 is a diagram showing the structure of the mediation server of the O2O-based detective mediation system using blockchain according to an embodiment of the present invention.

Referring to FIG. 3, the mediation server 300 of the O2O-based detective mediation system using blockchain according to an embodiment of the present invention connects a plurality of private blockchain nodes 400 and a public blockchain 500 through an information and communication network. , a server communication unit 310 that performs data communication with one or more client terminals 100 and detective terminals 200, a cost processing unit 320 that processes procedures for prepayment of costs or deposits for requested cases, Upon receiving the request for the requested case from the client terminal 100 and completing the prepayment or deposit, the request reception unit 330 receives request information for the case and registers it in the case database 325. Connection information connecting the case matching unit 340, which matches one of a plurality of detectives registered in the detective database 345 to the request according to the information, the matched client terminal 100, and the detective terminal 200. A connection information generator 350 generates and distributes to the client terminal 100 and the detective terminal 200, receives requests for client registration from multiple client terminals, and performs DID (Decentralized ID) identity authentication based on the public blockchain. Based on the criminal history-related verification information (VP: Verifiable Presentation) received from the client terminal, the client's criminal history, crime type, sentence type, and sentence period are evaluated according to preset standards to determine whether to register the client. and a client management unit 370, which registers client information for the client whose registration has been determined in the client database 375 and stores the DID and hash value of the client information in the plurality of private blockchain nodes 400. A detective registration request is received from the detective terminal 200, DID (Decentralized ID) identity authentication is performed based on a public blockchain, and the received detective information is compared with the preset detective registration requirements for detectives who meet the criteria. It may include a detective management unit 360 that registers detective information in the detective database 345 and stores the DID and hash value of the detective information in the plurality of private blockchain nodes 400.

The server communication unit 310 can perform data communication with a plurality of private blockchain nodes 400, a public blockchain 500, a plurality of requester terminals 100, and a detective terminal 200 through an information and communication network. Data transmitted and received according to such data communication includes criminal record-related proof information (VP) for DID identity authentication included in the requester registration request of the client terminal 100, DID, hash value, request information, and request receipt based thereon. Request, DID included in the detective registration request of the detective terminal 200, DID for identity authentication, hash value, and transmission of connection information according to matching between the requester and the detective.

The cost processing unit 320 may process procedures such as prepayment or deposit of costs for a case requested from the client terminal 100. In the case of credit cards, it can be processed by linking with external financial company systems and can be linked with external deposit agency systems such as escrow. The cost processing unit 320 can provide simple payment using a payment agency service (PG) when the client makes a payment.

In the present invention, the receipt of a request may be premised on the requester's fee payment procedure being preceded. This is because separate data related to the case that can identify the client is not stored and managed not only in the detective terminal 200 but also in the mediation server 300, so the case and costs are likely to be left unprocessed due to the client's unilateral disappearance. This is to minimize possible problems. Of course, depending on the contract details, it is also possible to perform a procedure to refund the requester for uncompleted requests or the difference in amount.

In particular, the cost processing unit 320 can process payment procedures to the detective for expenses excluding a certain rate of commission for the prepayment or deposit paid at the time of filing the case when the ongoing case is normally completed. Here, the excluded costs become the income of the system operator.

The case database 325 may store request information for requests for which payment has been completed. Additionally, the event database 325 can store the minimum personal information about the client required to provide the service, and this personal information may be the contact information or MAC address of the client terminal.

The request reception unit 330 receives the request and request information requested from the client terminal 100, and when the cost payment process by the cost processing unit 320 is completed, the request is registered in the mediation server 300. , request information can be transmitted to the case matching unit 340.

The case matching unit 340 compares the information on the request included in the request information with the information on one or more detectives already registered for the case registered in the system to select and match one detective suitable for the request. .

The request information includes minimal information about the case, such as the investigation area, investigation request period, and expected cost, and the case matching unit 340 considers the service area and price included in the detective information presented by the detective and provides appropriate information. Detectives can be extracted and connected to clients.

The client database 375 may store client information of registered clients according to the essentials of the client terminal 100. Client information may include the client's payment method, contact information, etc.

The detective database 345 may store detective information of registered detectives at the request of the detective terminal 200. Detective information may include information related to detective qualifications, specialty areas, payment methods, and personal information about detectives with private investigation qualifications, etc., and such detective information is referred to by the case matching unit 340 when registering a request. It can be used to select a detective or to pay expenses after the case is completed.

The connection information generator 350 generates connection information as a connection means for each terminal with reference to the request information and detective information, according to the matching of the request and the detective, and generates connection information as a connection means for the requester terminal 100 and the detective terminal 200. ) can be distributed. This connection information may include one or more of each terminal's phone number, IP address, and MAC address.

The detective management unit 360 may register the detective in the system as a mediation target in response to a request from a plurality of detective terminals 200 connected to the mediation server 300. Detectives subject to registration in the system may be detectives or companies that comply with certain standards and relevant laws and are normally registered with the association, and a separate screening procedure may be added to determine whether these requirements are met.

Hereinafter, with reference to the drawings, a session connection structure for communication using a chat room between a client terminal and a detective terminal of an O2O-based detective brokerage system using a blockchain according to an embodiment of the present invention will be described in detail.

Figure 4 is a diagram showing the connection method of the requester terminal and the detective terminal of the O2O-based detective brokerage system using blockchain according to an embodiment of the present invention.

Referring to FIG. 4, the client terminal 100 of the O2O-based detective brokerage system using blockchain according to an embodiment of the present invention identifies the other party upon receipt of connection information and executes and converses with the client-side conversation process 101. You can create a session (SS1), open a chat room, and attempt to connect to the detective terminal 200. The detective terminal 200 also identifies the other party upon receiving the connection information, executes the detective conversation process 201, and conducts the conversation. You can access the session (SS1) and attempt to connect to the requester terminal (100). This client-side conversation process 101 may include at least one conversation thread 102 for transmitting conversation content, data (data1), etc. input by the requester, and the detective-side conversation process 201 may include at least one conversation thread 102 that the detective inputs. At least one conversation thread 202 for transmitting conversation content, data (data2), etc. may be included.

Additionally, all conversation content and transmitted and received data (data1, data2) displayed in the chat window of the requester terminal 100 may be stored in the storage 147.

Thereafter, when the current conversation window ends, the detective side conversation process 201 can automatically delete all conversation content and data displayed in the conversation window, and when the conversation between the requester terminal 100 and the detective terminal 200 resumes after a certain period of time has elapsed, The requester terminal 100 creates a restoration session (SS2) and transmits all conversation contents and transmitted and received data (data1, data2) to the storage 147 to the detective terminal 200, and the detective side conversation process 201 Using this, the conversation contents up to the present can be restored and the conversation can be continued.

Additionally, the requester terminal 100 according to an embodiment of the present invention may further execute the detection process 105 to create a detection session (SS3) and connect to the detective terminal 200. This detection session (SS3) detects the execution of the storage process 205 related to the media storage function on the detective terminal 200, and while a conversation is in progress, functions such as screen capture and data storage are performed on the detective terminal 200. When the storage process 205 that executes is executed, it can detect it and report it to the requester-side conversation process 101 to request that the chat room be stopped, and the requester-side conversation process 101 can stop the chat room by stopping the chat room. It is possible to control the deletion of all conversation contents and transmitted and received data (data1, data2) displayed in the chat window of 200).

The above-described function can be activated or deactivated depending on the client's settings.

Hereinafter, a brokerage method using an O2O-based detective brokerage system using blockchain according to an embodiment of the present invention will be described in detail with reference to the drawings.

Figure 5 is a sequence diagram showing the brokerage method of the O2O-based detective brokerage system using blockchain according to an embodiment of the present invention. In the drawing, procedures indicated by solid lines refer to the transmission and reception of signals and processing of processes between each terminal and server, and procedures indicated by dotted lines refer to processing of processes offline or through an external system. Here, the description will be made on the assumption that the requester terminal 100 and the detective terminal 200 have performed a registration procedure in advance.

Referring to Figure 5, first, when a client who wishes to request a case executes the blockchain DApp for clients on his or her client terminal 100, transmits rough request information to the mediation server 300, and requests receipt of the case request. (S100), the mediation server 300 identifies the relevant client and requests the client terminal 100 to deposit a deposit in the form of a prepayment for case registration (S110).

Next, when the client who has confirmed the deposit request through the client terminal 100 pays the deposit to the system operator by means such as bank transfer or credit card payment (S120), the mediation server 300 receives and registers the request. In addition, matching is performed with one or more already registered detectives and the matching result is transmitted to the detective terminal 200 (S130).

Accordingly, the detective of the detective terminal 200 checks the request information and decides whether to accept the case. If it is decided to accept the case, the detective of the detective terminal 200 replies that the case is accepted (S140).

The mediation server 300, which has confirmed receipt of the case from the detective terminal 200, distributes connection information including the device identification number and IP address to the corresponding client terminal 100 and the detective terminal 200 so that the two terminals are connected to each other. Do it (S150).

Accordingly, the client and detective blockchain DApps of the client terminal 100 and the detective terminal 200 create a communication session based on the connection information, connect in a P2P manner, open a chat room (S160), and Request consultation is conducted through conversation transmission and reception between the requester terminal 100 and the investigation period terminal 200 (S170).

At this time, the above-described communication session includes a conversation session for the chat room and a restoration session for recovering conversation content, and here, the content transmitted and received in the chat room is transmitted as a conversation session.

Thereafter, it is stored in the client terminal 100 before deletion, and when the chat room is reopened according to the request of either the client terminal 100 or the detective terminal 200, it is transferred to the chat room on the client terminal through the above-described restoration session. The contents will be restored.

Next, when the request is terminated (S180), the requester terminal 100 discards the chat room (S181). If the chat room is stopped at a time when the request has not yet been terminated, the requester terminal 100 stores the contents of the chat room in the storage and , When the chat room is reopened, step S170 is re-performed along with restoration of the contents. At this time, the conversation content stored in the storage may be maintained for a certain period of time according to the settings of the requester.

Additionally, when the request is terminated (S190), the detective terminal 200 reports the termination of the case to the mediation server 300 (S191) and discards the chat room. Afterwards, when the chat room is resumed, the conversation content is received from the requester terminal and step S170 is performed again along with restoration of the content.

In addition, the operation side of the mediation server 300 processes payment for the cost paid in advance to the private investigation detective (S200) and then discards the case information related to the case (S210), thereby completing the procedure for one case. . Here, the case information only includes general information for case management, such as the request information provided by the initial client, subsequent schedule, and whether or not costs are processed, as well as specific conversations that occurred while handling the case and information directly related to case processing. However, it is desirable to discard it in the future to protect personal information.

Hereinafter, the technical idea of the present invention will be explained in detail through an example of a chat window screen provided by the O2O-based detective brokerage system using the blockchain of the present invention.

Figure 6 is a diagram illustrating a screen provided to a client terminal of an O2O-based detective brokerage system using blockchain according to an embodiment of the present invention.

Referring to FIG. 6, the previously registered client terminal of the O2O-based detective brokerage system using blockchain according to an embodiment of the present invention is connected to the detective terminal through a chat room, and the brokerage server connects the client and detective after matching. If the connection information is distributed to the requester terminal, the requester terminal is directly connected to the detective terminal using the connection information, and a chat room can be opened.

This chat room screen (W110) may have an interface similar to a known chat room, and the other party may also be provided with the same interface. The chat room screen (W100) may include a chat window (W110) that displays the conversation details exchanged between the client and the detective to date.

The content displayed in this chat window (W110) is maintained while the two terminals are connected, and when the conversation ends, the conversation content up to this point is stored only in the storage mounted on the requester terminal and deleted from both chat windows (W110). Afterwards, when the chat room is resumed, the chat window (W110) can be restored by loading the previous chat content stored in the requester's terminal. In particular, since previous conversation contents are not stored in the detective terminal, they are received from the requester terminal and synchronized.

In addition, the requester's conversation input window (W120) is placed at the bottom of the conversation window (W110), and the requester enters the desired conversation content using the input window (W120) and the virtual keyboard provided by the requester terminal to enter the conversation window (W110). can be reflected in

In addition, the chat window according to the embodiment of the present invention can transmit not only text-type conversation contents but also files such as images and videos necessary for research activities to the other party, and as an interface for this, attached files are displayed at the bottom of the input window (W120). An upload window (W130) that provides an upload function may be placed.

In addition, the chat window (W110) according to the embodiment of the present invention can additionally request a data call according to the selection of the requester or detective, and is an interface for this, between the bottom of the input window (W120) and the upload window (W130), or A data call window (not shown) may be placed at the bottom of the upload window (W130) or the top of the input window (W120). Alternatively, the chat window (W110) can additionally use the safe phone (050) service according to the selection of the client or detective, and as an interface for this, the safe phone call window (not shown) is located at the bottom of the input window (W120) and the upload window. It can be placed between (W130), at the bottom of the upload window (W130), or at the top of the input window (W120).

Although many details are described in detail in the above description, this should be interpreted as an example of a preferred embodiment rather than limiting the scope of the invention. Therefore, the invention should not be determined by the described embodiments, but by the scope of the patent claims and their equivalents.

100: Requester terminal 110: Terminal communication unit
120: Request request unit 130: Session creation unit
140: Chat room processing unit 141: Chat room opening module
143: Chat restoration module 145: Chat room disposal module
147: Storage 150: Suspicious activity detection unit
200: Detective terminal 300: Brokerage server
310: Server communication department 320: Cost processing department
325: Case database 330: Request reception department
340: Case matching department 345: Detective database
350: Connection information generation department 360: Detective management department
370: Client management department 375: Client database
400: Multiple private blockchain nodes
500: Public blockchain

Claims (5)

A client terminal that registers as a client through a blockchain DApp (Decentralized App) for clients, requests receipt of a case, opens a chat room through a chat session, and provides a conversation function about the contents of the request and progress of the case with the detective in the chat room. ;
A detective terminal that registers as a detective through a blockchain DApp for detectives, is connected to the client terminal through the conversation session, and provides a conversation function about the request content and case progress with the client in the chat room;
Multiple private blockchain nodes; and
Provide the client or detective blockchain DApp to the client terminal or detective terminal, perform a registration process in response to registration requests from the client terminal and detective terminal, receive and register cases requested from the client terminal, A mediation server that generates connection information by matching the client of the case and any registered detective, and distributes the connection information to the client terminal and the detective terminal,
The requester terminal is,
The matched detective terminal is invited to a chat room opened through the blockchain DApp (Decentralized App) for the requester and a conversation is conducted. When the chat room is terminated, the conversation contents and transmitted and received data in the chat room are stored in the storage, and the chat room is terminated. Afterwards, when a chat session is created and the chat room is re-run, the chat content stored in the storage is loaded into the chat room and transmitted to the detective terminal for synchronization,
The detective terminal is
After the chat room is opened through the detective blockchain DApp (Decentralized App), if the conversation ends and the chat room is closed, all conversations that have taken place to date in the chat room are automatically deleted,
The blockchain DApp (Decentralized App) for the above requester is
a terminal communication unit that performs data communication with the mediation server, the plurality of private blockchain nodes, or a detective terminal through an information and communication network;
After connecting to the mediation server, a request request unit transmits request information input by a requester to the mediation server to request a case request;
a session creation unit that creates a conversation session with the detective terminal for a conversation network based on the connection information; and
a chat room processing unit that opens a chat room linked to the chat session and shares the content input by the requester in the chat room and the content input to the detective terminal through the chat session; Including,
The chat room processing unit,
a chat room opening module that opens a chat room according to the creation of the chat session and processes a chat function with a detective terminal in the chat room;
a storage that stores all conversation content and transmitted and received data that occurred in the chat room;
When the detective terminal is reconnected through the conversation session, a conversation restoration module that restores the previous conversation content in the conversation room of the detective terminal by transmitting the conversation content of the chat room stored in the storage through the restoration session created by the session creation unit; and
Upon normal completion of the event, it includes a chat room disposal module that deletes all conversation contents and data stored in the storage,
The mediation server is,
A server communication unit that performs data communication with the plurality of private blockchain nodes, one or more requester terminals, or detective terminals through an information and communication network;
Cost processing department, which handles procedures for prepayment or deposit of fees for requested cases;
A request reception unit that receives a request for a case requested from the client terminal and, upon completion of prepayment or deposit, receives request information for the case and registers it in a case database;
a case matching unit that matches one of a plurality of detectives registered in the detective database to the request according to the request information;
A connection information generator that generates connection information connecting the matched client terminal and the detective terminal and distributes it to the client terminal and the detective terminal;
Requests for client registration are received from multiple client terminals, DID (Decentralized ID) identity authentication is performed based on a public blockchain, and the client's identity is verified based on criminal record-related verification information (VP: Verifiable Presentation) received from the client terminal. Criminal history, crime type, sentence type, and sentence period are evaluated according to preset standards to determine whether or not to register the client, and for clients whose registration has been decided, client information is registered in the client database, and the DID and hash of the client information are stored. a client management unit that stores values in the plurality of private blockchain nodes; and
Detective registration is requested from multiple detective terminals, DID (Decentralized ID) identity authentication is performed based on the public blockchain, and detective information is provided to detectives who meet the criteria by comparing the received detective information with preset detective registration requirements. It includes a detective management unit that registers in the detective database and stores the DID and hash value of the detective information in the plurality of private blockchain nodes,
All data transmitted and received in the chat rooms of the blockchain DApp for clients and the blockchain DApp for detectives is end-to-end encrypted,
The cost processing department,
Upon normal completion of an ongoing case, an O2O-based detective brokerage system using blockchain that processes payment procedures to the detective for costs excluding a certain rate of commission for the prepayment or deposit paid at the time of filing for the case. delete delete According to claim 1,
The chat room opening module deletes some or all of the conversation contents included in the activated chat room and the chat room stored in the storage, according to the requester's selection,
The session creation unit creates a detection session to detect a storage process created or running in the detective terminal,
The blockchain DApp (Decentralized App) for the client is,
The storage process is detected through the detection session, and when execution of a command related to saving, capturing, or transmitting the screen of the detective terminal is detected while the chat room is activated, the chat room processing unit forces the chat room to be terminated. Suspicious activity detection department requested by
An O2O-based detective brokerage system using blockchain that further includes. According to claim 4,
The suspicious activity detection unit acquires control rights to the front camera of the detective terminal while the detective blockchain DApp is running on the detective terminal, and when a separate camera is detected, it requests the chat room processing unit to forcibly close the chat room. O2O-based detective brokerage system using blockchain.

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