WO2024010233A1

WO2024010233A1 - Method and device for providing service for platform using blockchain-based did

Info

Publication number: WO2024010233A1
Application number: PCT/KR2023/008013
Authority: WO
Inventors: 김한조; 김태원
Original assignee: 주식회사 쿵월드
Priority date: 2022-07-06
Filing date: 2023-06-12
Publication date: 2024-01-11
Also published as: KR102460170B1; KR20240006408A

Abstract

Disclosed is a service providing method performed by a service providing device for a platform using a blockchain-based DID. The service providing method of the present invention comprises the steps of: receiving an object registration request for requesting registration of at least one object with a platform from a user terminal referring to a terminal of a user who has signed up for membership with the platform; acquiring history information related to a trading history and ownership information related to ownership of the object for which registration has been requested, and issuing a blockchain-based NFT for the at least one object; generating a blockchain-based DID for the at least one object by causing each piece of NFT information to be reflected in a structure of the blockchain-based DID so as to be classified according to preconfigured criteria; and providing a service related to trading for the at least one object to multiple users, who have signed up for membership with the platform, by using the blockchain-based DID.

Description

Service provision method and device for a platform using blockchain-based DID

The present invention relates to a method and device for providing services for a platform that uses a blockchain-based DID (Decentraized Identifier). More specifically, the present invention relates to a service provision method and device for a platform that uses a blockchain-based network and uses DID to provide services to users of the platform. It relates to a method and device for providing.

Recently, as blockchain-based technology has developed and been applied to various fields, services are also becoming more diverse. In particular, blockchain-based technology has strengths in security aspects, and is being actively applied to service areas where security aspects are important, such as finance. In addition, as interest in NFT (Non-fungible Token) rapidly increases in relation to blockchain-based technology, it is expanding to services that prove rights such as ownership and copyright and enable transactions.

In this regard, the application of NFTs in services related to blockchain-based technology is increasing, and the importance of security and safety issues is increasing accordingly. Meanwhile, most service-related platforms apply a membership system that allows users to use the service by registering as a member. Accordingly, users use the ID (Identifier), a unique identifier issued to them, to use the service. I am using it.

However, the ID, which is a unique identifier used in service-related platforms, poses a risk of leakage and the inconvenience of managing the user's personal information. Accordingly, platforms providing the Internet or applications require public certificates. Although procedures such as authentication are applied, there is a problem that can be very inconvenient for users.

One purpose of the present invention to solve the above problems is to provide a method of providing services to users of the platform using a DID (Decentraized Identifier) in a platform operated through a blockchain-based network.

Another purpose of the present invention to solve the above problems is to provide a device that provides services to users of the platform using DID in a platform operated through a blockchain-based network.

A service provision method for a platform using a blockchain-based DID (Decentraized Identifier) according to an embodiment of the present invention to achieve the above purpose is to provide services performed in a service provision device for a platform using a blockchain-based DID. As a method, receiving an object registration request requesting registration of at least one object in the platform from a user terminal, which means a terminal of a user who has registered as a member of the platform, ownership of the object for which registration is requested, and Obtaining history information related to related ownership information and transaction history and issuing a blockchain-based NFT for the at least one object, classifying each information of the NFT according to preset criteria in the structure of the blockchain-based DID Generating a blockchain-based DID for the at least one object by reflecting it as much as possible, and using the blockchain-based DID to make a transaction for the at least one object to a plurality of users who have registered as members of the platform Includes steps of providing related services.

Here, the step of issuing the blockchain-based NFT includes requesting object information, ownership information, and history information for at least one object requesting registration on the platform from the user terminal in response to the object registration request. , obtaining object information, ownership information, and history information about the at least one object from the user terminal and issuing a blockchain-based NFT for the at least one object, and ID information used by the user terminal on the platform. And it may include matching information related to the address of the blockchain-based NFT of the at least one object and transmitting it to the user terminal.

Here, the step of generating the blockchain-based DID divides each information included in the issued NFT to be distinguished by the preset criteria to generate a plurality of NFT information used to generate the blockchain-based DID. Converting the plurality of NFT information to correspond to a plurality of information items related to the blockchain-based DID to generate a blockchain-based DID for the at least one object, ID information of the user terminal Instead, updating the value for the identification criteria for the user terminal so that the blockchain-based DID is used on the platform, and transmitting the blockchain-based DID for the user terminal to the user terminal to use the platform. It may include supporting the user terminal to use the blockchain-based DID.

Here, the step of generating the plurality of NFT information includes generating first NFT information, which means the content file itself for at least one object corresponding to the issued blockchain-based NFT, and the issued blockchain-based NFT. A step of generating second NFT information, which means the title for at least one object corresponding to the NFT, the creator of the object, and the address information where the content file itself is stored, and at least one corresponding to the issued blockchain-based NFT It may include the step of generating third NFT information, which means address information where the ownership information, the history information, and the second NFT information for the object are stored.

Here, the step of generating the blockchain-based DID converts the ID information used by the user terminal into a unique identifier item among a plurality of items related to the blockchain-based DID, and selects the first item. It may include generating a step and converting the plurality of NFT information to be defined and stored within a DID Document among a plurality of items related to blockchain-based DID to generate a second item.

Here, the item of the unique identifier is in the DID Scheme area where the type of the blockchain-based DID is defined as DID, the DID Method area where information related to the DID document is defined, and within the DID method. It may include a DID method-specific identifier area (DID Method-Specific Identifier) in which the identifier used in is defined.

Here, the items of the DID document may be defined by the content indicated by the plurality of NFT information and the information related to the block in which each NFT information is stored among the plurality of blocks included in the blockchain-based network, separated for each NFT information. there is.

Here, the object may be a sound source.

According to another embodiment, a service provision method performed by a service providing device to generate a DID (Decentraized Identifier) through a blockchain network and update it on the platform includes the service providing device requesting a user terminal to register as a member of the platform. Obtaining ID information of the generated user terminal; Receiving, by the service providing device, an object registration request requesting registration of at least one object on the platform from a user terminal; Obtaining, by the service providing device, ownership information related to ownership of the object for which registration is requested and history information related to transaction history from the user terminal; The service providing device issues an NFT containing ownership information about ownership of the acquired object and history information about transaction history through a blockchain network; Generating a DID for the at least one object by reflecting each information of the NFT to be classified according to a preset standard; And when a service related to a transaction for the at least one object occurs by a plurality of users who have registered as members of the platform, issuing an NFT on a blockchain network and updating the generated DID.

Here, the step of issuing the NFT through a blockchain network includes object information, ownership information, and Requesting history information from the user terminal; Obtaining object information, ownership information, and history information for the at least one object from the user terminal, by the service providing device, through a blockchain network, and issuing an NFT for the at least one object; And the service providing device may include the step of matching the ID information generated by the user terminal through the platform and the address of the NFT of the issued at least one object and transmitting it to the user terminal.

Here, the step of generating the DID includes generating a plurality of NFT information by dividing each information included in the issued NFT by the service providing device to be distinguished by the preset standard; Converting, by the service providing device, the plurality of NFT information to correspond to a plurality of information items related to the DID to generate a DID for the at least one object; Updating, by the service providing device, an identification reference value for the user terminal to the platform so that the blockchain-based DID is used in the platform instead of the ID information of the user terminal; And it may include the step of the service providing device transmitting a blockchain-based DID for the user terminal to the user terminal.

According to the present invention, a service provision method for a platform using a blockchain-based DID has the effect of issuing a DID, a unique identifier that can guarantee security, reliability, and economic efficiency to users using the platform. , In relation to this, there is an effect of guaranteeing the same security, reliability, and economic efficiency for information related to NFTs of objects registered on the platform.

According to the present invention, the service provision method can be created through a blockchain network through a DID (Decentraized Identifier) and updated on the platform. Specifically, the service provision device that performs the service provision method can primarily generate and distribute ID information to users who sign up for membership on the platform, and secondarily, in the process of issuing blockchain-based NFTs, blockchain-based By creating a DID, an update can be performed on the platform so that the ID information can be changed to DID information and used.

Through this, security, reliability, and economic efficiency can be guaranteed for information or services related to objects during the user's use of services provided through the platform.

Figure 1 is a hardware block diagram of a service providing device that performs a service providing method for a platform using a blockchain-based DID according to an embodiment of the present invention.

Figure 2 is a conceptual diagram illustrating an environment in which a service provision method for a platform using a blockchain-based DID is performed according to an embodiment of the present invention.

Figure 3 is a flowchart showing a service provision method for a platform using a blockchain-based DID according to an embodiment of the present invention.

Figure 4 is a flow chart illustrating a method of issuing a blockchain-based NFT in a service provision method for a platform using a blockchain-based DID according to an embodiment of the present invention.

Figure 5 is a flowchart showing a method of generating a blockchain-based DID in a service provision method for a platform using a blockchain-based DID according to an embodiment of the present invention.

Figure 6 is a flowchart showing a method of generating NFT information in a service provision method for a platform using a blockchain-based DID according to an embodiment of the present invention.

Figure 7 is a flowchart showing a method of generating a plurality of items for DID in a service provision method for a platform using blockchain-based DID according to an embodiment of the present invention.

Figure 8 shows that the service providing device according to an embodiment of the present invention issues an NFT on the blockchain when a transaction occurs, such as a platform server, a user terminal, and transfer of ownership of an object, and based on the ID for the issued NFT and the user terminal This is a block diagram showing the specific details of creating a DID and updating it on the platform.

Since the present invention can make various changes and have various embodiments, specific embodiments will be illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all changes, equivalents, and substitutes included in the spirit and technical scope of the present invention. While describing each drawing, similar reference numerals are used for similar components.

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

When a component is said to be "connected" or "connected" to another component, it is understood that it may be directly connected to or connected to the other component, but that other components may exist in between. It should be. On the other hand, when it is mentioned that a component is “directly connected” or “directly connected” to another component, it should be understood that there are no other components in between.

The terms used in this application are only used to describe specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, terms such as “comprise” or “have” are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. It should be understood that this does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof.

Hereinafter, a preferred embodiment according to the present invention will be described in detail with reference to a plurality of attached drawings (FIGS. 1 to 7).

First, the 'object' described in relation to the service provision method and service provision device for a platform using blockchain-based DID according to an embodiment of the present invention is an asset in the current situation compared to the past, such as ancient coins or works of art. It can refer to an object whose value has rapidly increased and is receiving attention as an object of investment.

In addition, the 'object' described in relation to the service provision method and service provision device for a platform using a blockchain-based DID according to an embodiment of the present invention is a virtual space (e.g., a virtual space, not a real one). It may primarily refer to objects such as works of art and real estate that exist in spaces such as the metaverse.

In addition, the 'object' described in relation to the service provision method and service provision device for a platform using a blockchain-based DID according to an embodiment of the present invention is a virtual space (e.g., an online game and It may primarily refer to objects such as items or contents that exist in the same space, etc.).

In particular, the 'object' described in relation to the service provision method and service provision device for a platform using blockchain-based DID according to an embodiment of the present invention is an 'object' to which the concepts of 'copyright' and 'ownership' can be applied. It may primarily refer to objects such as 'works', and for example, 'works' such as 'sound recording', 'music', etc. may also exist. In embodiments of the present invention, the 'object' may preferably be a 'sound source'.

Referring to FIG. 1, a block diagram of a service providing device 100 that performs a service providing method to generate a Decentraized Identifier (DID) through a blockchain network and update it on the platform is shown. The service providing device 100 includes at least one processor 110 for performing a service providing method and a memory storing instructions that instruct the at least one processor to perform at least one step. 120) may be included.

Here, the at least one processor 110 is a central processing unit (CPU), a graphics processing unit (GPU), or a dedicated processor on which methods according to embodiments of the present invention are performed. It can mean. Each of the memory 120 and the storage device 160 may be comprised of at least one of a volatile storage medium and a non-volatile storage medium. For example, the memory 120 may be comprised of at least one of read only memory (ROM) and random access memory (RAM).

Additionally, the service providing device 100 may include a transceiver 130 that performs communication through a wireless network. Additionally, the service providing device 100 may further include an input interface device 140, an output interface device 150, and a storage device 460. Each component included in the service providing device 100 is connected by a bus 170 and can communicate with each other.

The service providing device 100 can issue NFTs through the blockchain network 500. The blockchain network 500 may be composed of a plurality of nodes (500-1, 500-2, 500-3, 500-4, ..., 500-N) operating by a plurality of computing systems. The blockchain network 500 can distribute (minting) the NFT smart contract generated by the service providing device 100. Smart contracts define contractual obligations between two or more parties and automatically enforce these obligations. A person skilled in the art can understand a smart contract as a self-executing contract, blockchain contract, or digital contract. Smart contracts contain computer code that is stored and replicated in the blockchain network 500 and is supervised by multiple computing systems 500-1-500-N running on the blockchain. Blockchain network 500 is a digitized, decentralized distributed ledger of transactions. In some implementations, blockchain network 500 operates on a public blockchain-based computing platform, such as Ethereum, for example. In other implementations, blockchains may operate on private blockchain-based computing platforms.

Here, at least one step may refer to a step related to a service provision method for a platform using the blockchain-based DID according to an embodiment of the present invention, and more specifically, the blockchain-based DID of the present invention. Steps related to the operating method of the service providing device 100 that performs the service providing method for the platform being used may be further included. For example, the service provision device 100 may perform a service provision method to generate a Decentraized Identifier (DID) through a blockchain network and update it on the platform.

Hereinafter, a service providing method for a platform using a blockchain-based DID according to an embodiment of the present invention described with reference to FIG. 1 is performed using a blockchain-based DID performed in the service providing device 100. The environment related to the service provision method for the platform can be described in more detail with reference to FIG. 2.

Referring to FIG. 2, the service provision method for a platform using a blockchain-based DID according to an embodiment of the present invention includes a service provision device (which may refer to the service provision device 100 described with reference to FIG. 1). 200), it may be performed by the user terminal 300 and the server 400, and more specifically, it may be performed by the leading role of the service providing device 200. The service providing device 200 may issue an NFT on the blockchain network 500 based on data about object transactions exchanged with the user terminal 300 and the server 400. At this time, only meta information and transaction information related to the transaction can be issued on the blockchain network 500 through a smart contract, and the original content data can be stored in a separate storage (not shown). Here, the platform provides object transactions performed by the physical components (hardware, memory, storage, I/O device, communication unit) of the server 400 and transaction services through user terminals by members participating in object transactions. It can refer to software/program that does.

First, the service providing device 200 may obtain ID information of the user terminal 100 generated when the user terminal 100 requests membership registration to the server 400 of the platform (see FIG. 8). . ID information is unique identification information and may mean a value that allows the platform server 400 to identify the user terminal 100.

In addition, the service provision device 200 transmits and receives all information (object information, ownership information, history information, ID information, etc.) required to perform the service provision method to the user terminal 300 and the server 400. It can be interconnected based on communication with the user terminal 300 and the server 400 to make a request (see FIG. 8).

Meanwhile, the user terminal 300 may refer to a device such as a user's terminal that uses the service, and more specifically, a device such as a user's smart phone and PC that includes a function to perform communication. It can mean. In addition, when the user terminal 300 receives a request for information required to perform a service provision method for a platform using a blockchain-based DID according to an embodiment of the present invention from the service provision device 200, The corresponding information can be transmitted to the service providing device 200. For example, when a transaction occurs for an object that is a transaction target, the user terminal 300 may transmit object information (content information), ownership information, and history information to the service providing device 200. In some cases, the user terminal 300 may receive information (eg, ID information) necessary for specifying information from the server 400 (see FIG. 8). The above-mentioned necessary information may be information about the platform.

Additionally, the server 400 may refer to a device such as a server that operates or manages a platform using the blockchain-based DID of the present invention, and more specifically, a user (e.g., a business operator) that operates or manages the platform. etc.) may refer to a device. At this time, the server 400 performs a function of storing or managing information generated through a service provision method for a platform using a blockchain-based DID according to an embodiment of the present invention in the service provision device 200. can do. A platform is a software service that provides all management/transactions/functions for object transactions and may be a type of program/software that allows multiple members to access and control through their respective user terminals (see Figure 8) ).

For example, the server 400 specifically performs a member registration function according to a platform member registration request requested by the user terminal 100, generates an ID value capable of identifying members, and allocates it for each user terminal 100. can do.

When the server 400 receives a request for information required to perform a service provision method for a platform using a blockchain-based DID according to an embodiment from the service provision device 200, the server 400 provides the corresponding information to the service. It can be transmitted to the device 200. In addition, when the server 400 receives a request for storage of information generated through a service provision method for a platform using a blockchain-based DID according to an embodiment of the present invention, the server 400 sends the corresponding information to the server 400. ) can also be saved within.

Here, the service providing device 200 and the server 400 have been described as being physically separated from each other, but this may not necessarily be limited to this. In other words, the service providing device 200 may be formed to be included in the server 400, or may be formed in the form of a hardware module that performs the role of the service providing device 200 within the server 400.

Hereinafter, the service providing device 100 described with reference to FIG. 1 and the service providing device 200 described with reference to FIG. 2, the user terminal 300 server 400, and the blockchain network 500 are described. The specific process in which the service provision method for a platform using a blockchain-based DID according to an embodiment of the invention is performed can be described in more detail with reference to FIGS. 3 to 8.

Referring to FIG. 3, a method of providing a service for a platform using a blockchain-based DID according to an embodiment of the present invention includes the service providing device 100 described with reference to FIG. 1 and the service described with reference to FIG. 2. It may be performed by the providing device 200, the user terminal 300, and the server 400, and more specifically, it may be performed by the leading role of the

service providing devices

100 and 200.

First, the service providing device may receive an object registration request requesting registration of at least one object in the platform from a user terminal, which refers to a terminal of a user who has registered as a member of the platform (S100).

Specifically, the user terminal of a user who needs to register at least one object in the platform according to an embodiment of the present invention may register as a member through the platform's server. The user terminal can receive ID information of the user terminal that can be used on the platform from the platform server and provide it to the service provision device (see Figure 8). Thereafter, the user terminal may transmit an object registration request requesting registration of at least one object to the service providing device. Accordingly, the service providing device can receive an object registration request from the user terminal (see Figure 8).

Thereafter, the service providing device can acquire ownership information related to ownership of the object for which registration has been requested and history information related to transaction history from the user terminal and issue a blockchain-based NFT for at least one object (S200) .

Specifically, the issuance of an NFT may be a step in which the service providing device issues an NFT containing ownership information about the ownership of the acquired object and history information about the transaction history through a blockchain network. Referring to Figure 8, the service providing device 200 issues an NFT based on object information, history information, and ownership information provided from the user terminal, stores the original content in storage, and uses the smart contract in the blockchain network 500. It can be issued on the

This step S200 can be described in more detail with reference to FIG. 4 below.

Referring to FIG. 4, a service providing device that performs a service providing method for a platform using a blockchain-based DID according to an embodiment of the present invention requests registration to the platform through a user terminal in response to an object registration request. Object information, ownership information, and history information for at least one object may be requested (S210).

First, the service providing device may request the user terminal to provide object information, which means a content file for at least one object requesting registration on the platform, a title for the object, and information on the creator of the object. Additionally, the service providing device may request the user terminal to provide information about the owner of the object and the date when ownership was changed as ownership information. Additionally, the service providing device may request information about the number of times an object has been traded and the amount for each transaction as history information from the user terminal.

Thereafter, the service providing device may obtain object information, ownership information, and history information for at least one object from the user terminal and issue a blockchain-based NFT for at least one object (S220, see FIG. 8).

Here, the service providing device can issue an NFT on a blockchain network by setting it to include object information, ownership information, and history information for at least one object acquired from the user terminal, and more specifically, at least one object Object information, ownership information, and history information can be supported to be stored based on a plurality of blocks included in a blockchain-based network. In NFT, ownership information, history information, transaction information, and original content storage address can be issued directly to the blockchain network through a smart contract. The original content is stored in separate storage, and only the address where the original content is stored can be published on the blockchain network. For the issuance of NFT, the service providing device includes first NFT information, which means the content file itself for at least one object, a title for at least one object, a creator of the object, and first NFT information, which means the address information where the content file itself is stored. 2 NFT information can be created, divided into third NFT information including ownership information, history information, and second NFT information to manage the information, and in particular, only the third NFT can be issued to the blockchain network using a smart contract.

Thereafter, the service providing device may match the ID information used by the user terminal in the platform and the address of the blockchain-based NFT of at least one object and transmit it to the user terminal (S230).

Specifically, the service providing device may request ID information generated for the user terminal from the server of the platform. Accordingly, the platform server can receive a request for ID information generated for the user terminal from the service providing device. Afterwards, the platform server can confirm the ID information generated for the user terminal and transmit the confirmed ID information to the service providing device.

Thereafter, the service providing device can receive ID information generated for the user terminal from the server of the platform, and match the received ID information with the blockchain-based NFT issued for at least one object. Afterwards, the service providing device can transmit the ID information of the matched user terminal and the blockchain-based NFT to the user terminal. (Refer to the diagram in which matching information is provided from the service providing device 200 in FIG. 8 to the user terminal 300)

Referring again to FIG. 3, the service providing device according to an embodiment of the present invention can generate a DID for the at least one object by reflecting each information of the NFT to be classified according to a preset standard (S300) .

Here, this step S300 can be described in more detail with reference to FIG. 5 below.

Referring to Figure 5, the service providing device according to an embodiment of the present invention can generate a plurality of NFT information used to generate a DID by dividing each information included in the issued NFT so that it is distinguished by a preset standard. There is (S310).

Here, this step S310 can be described in more detail with reference to FIG. 6 below.

Referring to Figure 6, the service providing device according to an embodiment of the present invention can generate first NFT information, which means the content file itself for at least one object corresponding to the issued blockchain-based NFT ( S311, see the city in FIG. 8 where the creation of 1 ^st NFT Data is created from storage storing the original content).

Specifically, the first NFT information generated by the service providing device may mean 'NFT Media data' among information related to NFT, and more specifically, the original for the object corresponding to the issued NFT. It can refer to the digital content itself.

In other words, the first NFT information generated by the service providing device may be generated based on object information previously obtained from the user terminal.

Thereafter, the service providing device may generate second NFT information, which means the title of at least one object corresponding to the issued blockchain-based NFT, the creator of the object, and the address information where the content file itself is stored (S312, Refer to the storage address of the original storage in Figure 8 and the city where ^2nd NFT Data is created by receiving history information and ownership information from the service providing device).

Here, the second NFT information generated by the service providing device may mean 'NFT Metadata' among information related to NFT, and more specifically, the title and description of the object corresponding to the issued NFT. , may refer to the location (e.g., address, etc.) where the creator and original digital content are stored.

In other words, the second NFT information generated by the service providing device may be generated based on object information and ownership information previously obtained from the user terminal.

Thereafter, the service providing device may generate third NFT information, which means ownership information, history information, and address information where the second NFT information is stored for at least one object corresponding to the issued blockchain-based NFT (S313 , see the illustration of generating information from a published blockchain network 500 smart contract in Figure 8).

Here, the third NFT information generated by the service providing device may mean an 'NFT Smart Contract' among information related to NFT, and more specifically, the owner of the object corresponding to the issued NFT, This may refer to information about the date when ownership was changed, the number of times the object was traded, and the amount for each transaction.

In other words, the third NFT information generated by the service providing device may be generated based on object information, ownership information, and history information previously obtained from the user terminal.

Again, referring to Figure 5, the service providing device according to an embodiment of the present invention can generate a DID for at least one object by converting a plurality of NFT information to correspond to a plurality of information items related to the DID. (S320).

Here, this step S320 can be described in more detail with reference to FIGS. 7 and 8 below.

Referring to FIG. 7, the service providing device according to an embodiment of the present invention converts the ID information used by the user terminal into a unique identifier item among a plurality of items related to the blockchain-based DID. A first information item can be created (S321, see the illustration of converting id information from the user terminal into a unique identifier in FIG. 8).

Here, the item of the unique identifier meaning the first information item is the DID Scheme area, where the type of blockchain-based DID is defined as DID, and the DID Method area, where information related to the DID document is defined. And it may include a DID method-specific identifier area (DID Method-Specific Identifier) in which the identifier used within the DID method is defined.

For example, a unique identifier item indicating the first information item may have the form “Scheme:DID Method:Did Method Specific Identifier”. At this time, "Scheme" can be defined as a fixed value as "did", and "DID Method" can be defined as the method by which DID and DID documents are created or updated. Based on the W3C, lowercase English letters can be defined. It can be defined as a value.

Afterwards, the service providing device can convert a plurality of NFT information to be defined and stored within a DID Document among a plurality of items related to blockchain-based DID to create a second information item (S322, (See the city where a DID document is created from the extracted plurality of NFT information in Figure 8).

Here, the item of the DID document, which means the second information item, is the content indicated by the plurality of NFT information and the information related to the block in which each NFT information is stored among the plurality of blocks included in the blockchain-based network for each NFT information. Can be defined separately.

For example, the item of the DID document, which means the second information item, can be defined for each NFT information based on methods such as JSON (JavaScript Object Notation), and in addition, the cryptographic public key and DID can be used for authentication. Additional information about the method may be included.

Referring again to FIG. 5, the service providing device according to an embodiment of the present invention updates the value for the identification standard for the user terminal so that the blockchain-based DID is used on the platform instead of the ID information of the user terminal. It may be possible (see S330, where the generated DID of FIG. 8 is updated on the server 400 of the platform).

Specifically, the service providing device can transmit information about the blockchain-based DID generated for the user terminal to the platform server, and through this, the ID generated for the user terminal can be changed to a blockchain-based DID and stored. You can request this from the platform's server.

Accordingly, the server of the platform can receive information about the blockchain-based DID generated for the user terminal from the service providing device, and the ID information generated for the user terminal can be converted to the blockchain-based DID received from the service providing device. You can change it to DID and save it. Afterwards, the platform's server can transmit a message to the service providing device notifying that the blockchain-based DID for the user terminal has been stored.

Afterwards, the service providing device can receive a message from the platform's server notifying that the blockchain-based DID for the user terminal has been stored, and through this, it can be determined that the blockchain-based DID for the user terminal has been stored in the platform's server. You can. Through this method, the service providing device can update the value for the identification standard for the user terminal so that the blockchain-based DID can be used on the platform instead of the ID information of the user terminal.

Afterwards, the service providing device can transmit the blockchain-based DID for the user terminal to the user terminal. (S340).

Here, the user terminal may receive DID information, which is information related to the blockchain-based DID or DID generated for the user terminal, from the service providing device. Thereafter, the user terminal can use the blockchain-based DID or DID-related information received from the service providing device in place of the ID information received in advance during membership registration from the platform server. Through this, the service providing device can support user terminals to use blockchain-based DID on the platform.

Referring again to FIG. 3, the service providing device according to an embodiment of the present invention provides services related to transactions for at least one object to a plurality of users who have registered as members of the platform using a blockchain-based DID. Can be provided (S400).

Specifically, when a service related to a transaction for an object is generated by multiple users who have registered as members on the platform for a plurality of objects registered on the platform, the service provision device provides a service related to the transaction that occurred for the object. Based on the contents of , blockchain-based NFTs can be issued on the blockchain network, and blockchain-based DIDs can be updated on the platform based on the issued blockchain-based NFT.

In other words, the blockchain-based DID according to an embodiment of the present invention may include NFT information about the object, and the NFT information about the object may be changed based on the contents of the service related to the transaction that occurred for the object. This may mean that the blockchain-based DID can be updated based on changed NFT information.

A service providing device that performs a service providing method for a platform using a blockchain-based DID according to an embodiment of the present invention through the method described above primarily provides ID information to a user registering as a member of the platform. It can be created and distributed, and in the process of issuing a secondary blockchain-based NFT, a blockchain-based DID can be created to support the use of ID information by changing it to DID information.

Through this, the service providing device that performs the service providing method for a platform using blockchain-based DID according to an embodiment of the present invention provides information or services related to objects in the process of the user using the service provided through the platform. Security, reliability, and economic efficiency can be guaranteed.

Referring to Figure 8, the service providing method according to the present invention is performed between the service providing device 200, the user terminal 300, the server 400, and the blockchain network 500 described through Figures 1 to 7. The configuration is shown.

In summary, the user terminal 300 can perform membership registration and obtain identifiable user terminal ID information through the server 400 operating the platform. The user terminal 300 provides an object registration request requesting registration of at least one object to the service providing device 200. The service providing device 200 receives object information, history information, and ownership information about the requested object from the user terminal 300.

The service provision device 200 issues an NFT containing ownership information about the ownership of the acquired object and history information about the transaction history through the blockchain network 500. Specifically, the service providing device 200 may store the original content data in a separate storage and issue a smart contract including ownership information, transaction history, content storage address, etc. through the blockchain network 500.

Thereafter, the service providing device 200 may divide each piece of information included in the NFT issued for DID generation to be distinguished based on the preset criteria. The preset criteria may consist of i) original content data ii) NFT metadata iii) smart contract. Specifically, referring to Figure 8, the first NFT information (1 ^st NFT Data) is generated based on the original content data, and refers to the title for one object, the creator of the object, and the address information where the content file itself is stored. You can generate second NFT information ( ^2nd NFT Data) and generate third NFT information ( ^3rd NFT Data) corresponding to smart contract information.

Thereafter, the service providing device 200 may generate a DID for the object based on the NFT information extracted by dividing the issued NFT and the ID information of the user terminal. Specifically, the service providing device 200 converts the ID information provided by the user terminal 300 into a unique identifier to generate a first information item, and the service providing device 200 generates a DID document (DID) based on the extracted NFT information. A second information item (document) can be created.

The service providing device 200 may update the DID consisting of the first information item and the second information item in place of the existing ID information stored in the platform server 400.

The service providing device 200 may issue an NFT on the blockchain network and update the DID when a service related to a transaction for an object occurs by a plurality of users who have registered as members of the platform.

Methods according to the present invention may be implemented in the form of program instructions that can be executed through various computer means and recorded on a computer-readable medium. Computer-readable media may include program instructions, data files, data structures, etc., singly or in combination. Program instructions recorded on a computer-readable medium may be those specifically designed and configured for the present invention, or may be known and usable by those skilled in the art of computer software.

Examples of computer-readable media may include hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, flash memory, etc. Examples of program instructions may include machine language code such as that created by a compiler, as well as high-level language code that can be executed by a computer using an interpreter, etc. The above-described hardware device may be configured to operate with at least one software module to perform the operations of the present invention, and vice versa.

Additionally, the above-described method or device may be implemented by combining all or part of its components or functions, or may be implemented separately.

[Explanation of symbols]

100: service provision device 110: processor

120: memory 130: transmitting and receiving device

140: input interface device 150: output interface device

160: storage device 170: bus

200: Service provision server 300: User terminal

400: Server 500: Blockchain network

Claims

A service provision method performed by a service provision device to generate a Decentraized Identifier (DID) through a blockchain network and update it on the platform,

Obtaining, by the service providing device, ID information of the user terminal generated when the user terminal requests membership to the platform;

Receiving, by the service providing device, an object registration request requesting registration of at least one object on the platform from a user terminal;

Obtaining, by the service providing device, ownership information related to ownership of the object for which registration is requested and history information related to transaction history from the user terminal;

The service providing device issues an NFT containing ownership information about ownership of the acquired object and history information about transaction history through a blockchain network;

Generating a DID for the at least one object by reflecting each information of the NFT to be classified according to a preset standard; and

When a service related to a transaction for the at least one object occurs by a plurality of users who have registered as members of the platform, issuing an NFT on a blockchain network and updating the generated DID,

The step of issuing the NFT through a blockchain network is,

requesting, by the service providing device, object information, ownership information, and history information for at least one object requesting registration on the platform from the user terminal to the user terminal in response to the object registration request;

Obtaining object information, ownership information, and history information for the at least one object from the user terminal, by the service providing device, through a blockchain network, and issuing an NFT for the at least one object; and

The service providing device includes the step of matching the ID information generated by the user terminal through the platform and the address of the NFT of the issued at least one object and transmitting it to the user terminal,

The step of generating the DID is,

Generating a plurality of NFT information by dividing each information included in the issued NFT by the service providing device to be distinguished by the preset standard;

Converting, by the service providing device, the plurality of NFT information to correspond to a plurality of information items related to the DID to generate a DID for the at least one object;

Updating, by the service providing device, an identification reference value for the user terminal to the platform so that the blockchain-based DID is used in the platform instead of the ID information of the user terminal; and

A service providing method comprising the step of transmitting, by the service providing device, a blockchain-based DID for the user terminal to the user terminal.
In claim 1,

The step of generating the plurality of NFT information is,

Generating first NFT information meaning the content file itself for at least one object corresponding to the issued NFT;

Generating second NFT information meaning the title of at least one object corresponding to the issued NFT, the creator of the object, and the address information where the content file itself is stored; and

A service comprising the step of generating third NFT information, which means address information where the ownership information, the history information, and the second NFT information for at least one object corresponding to the issued NFT are stored. How to provide.
In claim 2,

The step of generating the blockchain-based DID by converting the plurality of NFT information to correspond to a plurality of information items related to the DID,

generating a first information item by converting the ID information of the user terminal into a unique identifier item; and

Characterized in that it includes the step of generating a second information item by converting the plurality of NFT information into an item of a DID document.