KR20230087025A - Digital image transaction system using NFT and blockchain technologies - Google Patents

Abstract

A digital photo trading system using block chain and NFT technology is launched. The system stores and manages ownership certificates for NFT-based proof of ownership of digital photos evaluated at the asset value evaluation amount for one or more digital photos, and transaction records for each digital asset in an NFT-based blockchain node to store and manage actual transaction information. A digital photo trading system having a blockchain platform system that provides; and a user terminal (Web, App) that is connected to the digital photo trading system through a wired/wireless communication network and receives actual photos, ownership information of the image-processed photos, and actual transaction information.
In a digital asset management system that includes image shapes and backgrounds of the same structure as the image processing of the original photo, public or private blockchain platform systems are used, and digital assets (photos) are transferred to transaction sites using blockchain and NFT technology. A contract to change the ownership of digital assets (photos) of the winning/transacted smart contract transaction parties (buyer-transferee) who initiates the auction and pays the corresponding amount with the owner (transferrer), proof of ownership of the photo, verification of authenticity, or actual The actual transaction information with the smart contract transaction party (buyer) who paid the corresponding amount to the owner of the asset is stored in the blockchain node and stored and managed in the distributed ledger.

Description

Digital asset transaction system using NFT and blockchain technologies

The present invention relates to a digital photo trading system using NFT and block chain technology, and more particularly, image conversion of an original original photo (RGB-> (grayscale conversion, YCbCr conversion, HSI conversion), color (Hue)/ Intensity/Saturation, background pattern), bluring using a blurring mask, sharpening using a sharpening mask, scaling/reduction/rotation of image size, image shape with the same structure as image processing, and a new background. The photo is registered in the digital photo trading system, the private blockchain platform system is used in the digital photo trading system, and the digital asset (photo) is registered on the trading site using NFT and block chain technology, and the owner (transferee) and the corresponding amount are registered. contract to change the ownership of digital assets (photos) of the winning/traded smart contract transaction party (buyer-transferee) that pays the contract, proof of ownership of the photo, or smart contract transaction party that paid the corresponding amount to the owner of the real asset (buyer It is about a digital asset trading system using NFT and blockchain technology that stores actual transaction information with ) in a blockchain node and stores and manages it in a distributed ledger.

Digital technology has characteristics that are easy to copy, and there were problems such as illegal copying and illegal sharing of portal sites. There was a problem with illegal sharing of movies, novels, and webtoons.

In response to this, DRM technology to prevent illegal copying has emerged. However, DRM can prevent piracy, but has limitations in allowing digital assets to be independently owned by individuals.

Recently, Non Fungible Token (NFT) is a non-replaceable token that cannot be reproduced because copies are not recognized, and proves the ownership and authenticity of digital assets.

It utilizes the encryption token technology used in cryptocurrencies (virtual currencies) such as Bitcoin, but unlike cryptocurrencies, it is not interchangeable. In other words, the NFT's digital signature is only used to track and prove ownership.

Recently, non-tamperable ownership information generated by the unique NFT (Non Fungible Token, non-fungible token) used to display the non-fungible digital original is obtained, the authenticity of the digital original is verified, proof of ownership, blockchain and NFT Digital paintings, digital works of art, digital music data, games, and antiques are traded and sold, and for example, metadata containing information about works of art such as digital paintings (owner, work name, copyright holder (name of artist), Copyright storage location URL, transaction history, transaction record) and anti-piracy timestamp are combined, making it impossible to copy. In particular, overseas companies such as ARTNET, ARTSY, and ARTPRICE manage transaction records and data on ownership of works of art displayed in offline and online galleries. When an NFT transaction is made, the ownership is sold to the buyer who has paid the purchase price from the owner, the authenticity of the work is verified, the copyright is not bought, and the copyright is transferable by transaction.

The United States has established an NFT exchange to put antiques, digital paintings, digital artworks, and digital art on the auction market and conduct auction activities for artworks. Representative NFT trading marketplaces are OpenSea, Rarible, and Valuables. ), Super Rare, etc.

As prior art 1 related to this, a "digital photo trading method" is registered in Patent Registration No. 10-0656219.

1A is a block diagram of a conventional digital photo trading system.

In the digital photo transaction system, a card company site is networked with a bank site through a payment agency site, and the payment agency site is interconnected with an electronic payment server of the download server 106 . The download server 106 is composed of a web server through a firewall along with an electronic payment server, an authentication server, and an image file server. The web server is interconnected to the subject's PC 108 through the Internet, and the photographer's PC 102, which takes pictures with the digital camera 104 and transmits them, is interconnected.

The software (S/W) used to drive the digital photo trading system is security-related password generation and password authentication, payment and settlement (settlement/distribution, electronic payment module and tax calculation), image-related image processing, image upload, and image download. and image file management and user interface.

Figure 1b shows the digital photo trading method of Figure 1a.

The digital photo transaction method (i) takes a photo of a target person by a digital camera, provides a network of a photographer's PC, a target person's PC, and a download server, and provides a site address to search for a subject's photo from the photographer's PC, a photographer ID, and an encryption key. Step of providing the picture target PC; (ii) the photographer's PC encrypts the target person's photo and transmits the photo together with the photographer's information and encryption key to a download server and uploads it to a digital photo service site; (iii) the PC of the subject of the photo accesses the digital photo service site, searches for sample photos processed with an encryption key, selects the photo to be purchased and the folder on the user's computer to download, and electronically pays the amount of the photo; (iv) downloading, by the download server, the corresponding photo to the user's computer folder or storing it as an Internet album provided by a photo trading system; (v) settling the payment amount for the downloaded photos among the photos uploaded by the photographer's PC as the photographer's PC inquires about the sales status of the target person's photos uploaded to the download server. Provide a trading method.

However, in the existing digital photo trading system, transactions were made with sellers and buyers, but since the original NFT was not used, proof of ownership of digital assets, authenticity verification, and anti-forgery technology were not applied. , image conversion (RGB -> grayscale conversion, YCbCr conversion, HSI conversion), bluring using a blurring mask, sharpening using a sharpening mask, image scaling, and image compositing technology of modern art are image processing. did not trade photos with the same structured image features and new backgrounds.

Patent Registration No. 10-0656219 (registration date: December 05, 2006), "Digital Photo Trading Method", Kim Oh-jin

The object of the present invention to solve the above problem is the image conversion of the original original photo (RGB-> (grayscale conversion, YCbCr conversion, HSI conversion), color (Hue) / brightness (Intensity) / saturation (Saturation), background pattern ), bluring using a blurring mask, sharpening using a sharpening mask, enlarging/reducing the size of an image, image processing of the same structure, and photos including a new background are registered with the digital photo trading system, and the digital photo trading system uses a private blockchain platform system, and uses blockchain and NFT technology to initiate an auction on the trading site for digital assets (photos) and pay the owner (transferrer) and the winning / traded smart contract transaction party (Ownership buyer-transferee)’s ownership change contract of digital asset (photo), proof of ownership of photo, or actual transaction information with the smart contract transaction party (buyer) who paid the corresponding amount to the owner of the actual asset to the blockchain node node) to store and manage in a distributed ledger, and provides a digital photo trading system using NFT and block chain technology.

In order to achieve the object of the present invention, a photo trading system using NFT and block chain technology provides an ownership certificate, digital A digital photo trading system having a blockchain platform system that stores and manages transaction records for each asset in an NFT-based blockchain node to provide actual transaction information; and a user terminal (Web, App) that is connected to the digital photo trading system through a wired/wireless communication network and receives actual photos, ownership information of the image-processed photos, and actual transaction information.

The photo trading system and method using the NFT and block chain technology of the present invention are the image conversion of the first original photo (RGB-> (grayscale conversion, YCbCr conversion, HSI conversion, wallpaper), bluring using a blurring mask, sharpening Sharpening using a mask, zooming in/out/rotating the image size, image processing of the same structured image shape and photos with a new background are registered, and the Flybit blockchain platform system is used in the digital asset management system, and NFT and blockchain are used. A winning/traded smart contract that initiates an auction on the trading site for digital assets (pictures) using technology and pays the owner (transferrer) and the corresponding amount. It has the effect of storing and managing ownership change contracts, verification of photo authenticity, or actual transaction information with smart contract transaction parties (buyers) who paid the corresponding amount to the owner of the real asset in a blockchain node and storing it in a distributed ledger.

1A is a block diagram of a conventional digital photo trading system.
Figure 1b shows the digital photo trading method of Figure 1a.
2 is a block diagram of a digital photo trading system using NFT and block chain technology according to the present invention.
3 is a picture in which the original photo is converted to the same photo size, and RGB -> (grayscale conversion, YCbCr conversion, HSI conversion), color (Hue) / brightness (Intensity) / saturation (Saturation), and background pattern are converted. . The first original photo can also be enlarged/reduced in photo size using image scaling technology.

Hereinafter, the configuration and operation of a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the description of the present invention, if it is determined that a detailed description of a related known technology or known configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. In addition, drawing numbers are assigned the same drawing numbers in different drawings when indicating the same configuration.

The digital photo trading system and method using the NFT and block chain technology of the present invention include enlargement and reduction of the original original photo, image conversion (RGB -> grayscale conversion, YCbCr conversion, HSI conversion), bluring using a blurring mask, Sharpening using a sharpening mask, enlargement/reduction of the image, images with the same structure as image processing, and photos with new backgrounds are registered in the digital photo trading system, and the Flybit blockchain platform system is used in the digital photo trading system. Digital assets of the winning/transacted smart contract transaction parties (ownership buyer-transferee) who initiate a transaction on the trading site for digital assets (pictures) using blockchain and NFT technology and pay the corresponding amount with the owner (transferrer) (Photo) ownership change contract, proof of ownership and authenticity verification of the photo, or actual transaction information with the smart contract transaction party (buyer) who paid the corresponding amount to the owner of the real asset is stored in the blockchain node and stored in the distributed ledger. manage

For example, the public blockchain platform system includes Bitcoin, Ethereum, etc., and in the embodiment, the private blockchain platform system uses the HyperLedger Fabric private blockchain platform system. did

A block connected to the blockchain can be created based on mining, which is a mining method that grants specific rights based on POW (proof of work), POS (proof of stake), DPOS (delegated proof of stake), or Hyperledger. Various methods can be used, such as for granted nodes to create blocks. A block is mined by including the information of the previous block, and this mining method can prevent forgery and alteration of transaction information recorded on the block.

2 is a block diagram of a digital photo trading system using NFT and block chain technology according to the present invention.

3 is a picture in which the original photo is converted to the same photo size, and RGB -> (grayscale conversion, YCbCr conversion, HSI conversion), color (Hue) / brightness (Intensity) / saturation (Saturation), and background pattern are converted. . The first original photo can also be enlarged/reduced in photo size using image scaling technology.

The digital asset trading system using the NFT and block chain technology of the present invention

For one or more digital photos, NFT-based proof of ownership for digital photos evaluated at the asset value evaluation amount, certificate of ownership used as authenticity verification, and transaction records for each digital asset are stored and managed in NFT-based blockchain nodes to provide actual transaction information A digital photo trading system having a blockchain platform system that provides; and

It is connected to the digital photo trading system through a wired or wireless communication network, and includes a user terminal (Web, App) that receives real photos, ownership information to which NFTs of the image-processed photos are assigned, and real transaction information.

The user terminal uses a PC, smart phone, or tablet PC (Web, App) connected to the digital asset management system through a wired or wireless communication network.

Digital assets include photos, webtoons, cartoons, cartoons, illustrations, industrial design images, industrial design images, 3D graphics and games with three-dimensional effects expressed in light and shadow contrast, and media data on ehdudd. It includes the certificate of ownership, owner information and real asset information.

For NFTs and blockchains, the original author, proof of ownership, and sales history are stored in the blockchain node.

The ownership certificate, ownership information, and asset information of the real digital asset cannot be changed by a third party who is not authorized to access the owner's own NFT-based ownership certificate, encrypted ownership information and encrypted real asset information from the owner. .

The user terminal uses a PC, smart phone, or tablet PC (Web, App) connected to the digital photo trading system 100 and the trading system 200 through a wired or wireless communication network.

The one or more digital photos are

Original photo enlargement and reduction, image conversion (RGB -> grayscale conversion, YCbCr conversion, HSI conversion), bluring using a blurring mask, sharpening using a sharpening mask, image enlargement/reduction and image compositing technology of modern art It is characterized in that it is a photo including an image shape of the same structure and a new background to which the image processing has been applied. For reference, bluring is also referred to as smoothing in which high-frequency components that refine an image are removed through low-pass filtering to be smoothed out. Sharpening emphasizes detailed high-frequency components in an image, and removes low-frequency components through high-pass filtering to achieve a sharpening effect (remove low-frequency components = high-pass filtering).

In addition, the digital photo trading system 100 is not limited to digital photo trading, but webtoons, cartoons, cartoons, illustrations, industrial design images, industrial design images, Unique NFTs are given to 3D graphics and games with three-dimensional effects of lighting, shadow contrast, and contrast, and are sold through a blockchain network. It is provided with a game player that provides.

For example, a buyer who wants to purchase a product catalog image or a Christmas card image accesses a digital asset trading system (digital photo trading system) to purchase an industrial design image or an industrial design image, and a separate text containing company address and contact information. The company logo image can be purchased by synthesizing the image using an image editor and making a payment.

The digital asset trading system 200 registers the information of the owner who has registered the one or more digital photos and the desired transaction price, deducts the transaction fee, and provides buyers with an "asset value evaluation amount" that requires expert appraisal in the case of expensive works. In the case of works of general low price, they are sold in an “auction method” in which the highest price at the auction is won with the amount of the bidder.

The digital asset trading system 200 is equipped with a public blockchain platform system or a private blockchain platform system,

In the blockchain platform system, the blockchain using its own NFT does not have a central server, and individual and individual distributed P2P in the Merkle Tree structure in which blockchain nodes connected in a chain structure are formed. Blocks (N1-B1,N2- After B2,N3-B3,..) is formed, blockchain nodes are sequentially connected in a chain structure.

The digital photo trading system uses a private blockchain platform system,

In the blockchain platform system, a blockchain using a unique NFT is allocated to each blockchain node through a distributed P2P network of individuals in a merkle tree structure in which blockchain nodes connected in a chain structure are formed (N1 ,N2,N3,..) After blocks (N1-B1,N2-B2,N3-B3,..), which are transaction ledgers in which P2P transaction data is recorded, are formed, sequentially block chain nodes form a chain structure. connected to

The digital asset management system is a unique NFT-based ownership certificate and owner information for real assets (photos) whose asset value is individually evaluated, smart contract management of real asset ownership change, history of real asset ownership change and actual Stores and manages the transaction details and transaction records of the owner and buyer of the asset.

The private blockchain platform system issues certificates that can record, modify, and delete data in the distributed ledger to participants who are authorized to participate in the private blockchain. Identity verification (idetify), which issues a private key (credential) by verifying the identity of a blockchain node by receiving a Network Certificate certificate;

A distributed ledger that stores and manages data in blockchain nodes diverged by a blockchain ordering service as a basic component of a private blockchain; Manage transaction transactions by storing transaction details and transaction records based on ownership certificates, owner information, real asset copyright owner information, and smart contracts for each real asset, which have proof of ownership of the unique NFT-based real asset by consensus protocol in the private blockchain Transaction;

In the case of ownership change by smart contract of real assets, use the Hyperledger Fabric private blockchain platform system that provides smart contracts between the current owner (transferrer) and the transaction party (transferee).

The private blockchain platform system

Ownership certificates of real assets are managed as unique NFTs so that forgery cannot be tampered with. Distributed identity verification module that issues NFT-based DID using blockchain technology;

In the private blockchain platform system, real asset information, real asset value appraised amount information, real asset owner information are registered, NFT-based ownership certificate for each real asset, owner information of real asset, and transaction details and transactions for each real asset Stock, which is used as a distributed storage of blockchain nodes in a private blockchain system and stores records in the owner's blockchain node;

In the private blockchain platform system, after the NFT-based ownership certificate of the real asset (digital asset) registered in the blockchain node of each owner, the encrypted owner information and the real asset information are stored in the storage of the stock, Ownership of Real Assets At the time of the transaction, the current owner of real assets (transferrer) and the authorized transaction party who has paid the corresponding amount specified in the contract in advance (transferee) are authorized transaction parties who have transferred ownership of real assets according to a smart contract. Store unique NFT-based ownership certificates (digital assets) for real assets that are renewed on new blockchain nodes for Assets that manage contract information (transferr/transferee information), transaction details and transaction records for each actual asset; and

The owner of the real asset issues and stores proof of ownership of the real asset to verify the ownership of the real asset stored in the asset at the request of the authorized owner, and when trading the real asset, In the case of a smart contract between the owner and the trading party, the owner of the real asset controls to allow access to the blockchain node of the owner with the trading partner only when the ownership of the real asset is changed, and the link that connects to the management server includes

In the above private blockchain platform system, the contract for changing the ownership of real assets, the smart contract based on the electronic signature between the owner (transferrer) and the transferee in the case of a transaction between the owner of the real asset and the transferee, the contract for changing the ownership of real assets is currently The proof-of-work (PoW) method is used by confirmation by the consensus algorithm between the owner and the transaction party, and the digital photo transaction system is linked with the private blockchain platform system, and the owner of the real asset Proof of Stake (PoS) is used for smart contracts that provide investment contracts for investors' real assets.

In the embodiment, in the blockchain platform system, when a contract for changing ownership of a real asset is transacted, a smart contract based on an electronic signature between the owner (transferrer) and the transferee is a smart contract between the current owner (AAA) of the real asset and the transaction party (the current owner). The Proof-of-Work (PoW) method is used by consensus by the Consensus Algorithm with the BBB who has paid the asset amount, and the digital photo trading system is private. Integrates with the blockchain platform system Proof-of-Stake (PoS) method was used for smart contracts of each real asset.

The electronic signature guarantees the legitimacy between the owner of the transaction and the transaction party, prevents forgery and alteration of the blockchain node (data storage), and provides a security function by hash encryption. Each blockchain node uses a hash function to create a unique hash value, and all blockchain nodes connected in a chain structure include the hash value (previousHash) of the previous blockchain node as one of the values to obtain the value. . In each block, six management information [Version, Previous block hash, Merkle Root, Time, difficulty target (bits, target), and Nonce] are included in the header. and the body stores transaction details (transaction #1, transaction #2, transaction #3, transaction #N). At this time, the previous block hash points to the hash of the previous block. After adding all 6 management information, the nonce is increased and repeated until it is smaller than the target value bits (target) through the hash function. If the above condition is satisfied, the hash value of the current block is determined and the newly created block is managed. It returns to the hash value (previousHash) of the previous blockchain node, which is one of the information.

Owners of real assets are legal entities or individuals;

Ownership information includes corporate information (corporate name, corporate registration number, corporate address, corporate phone number, corporate representative information-name, resident registration number, home address, TEL, mobile phone number, e-mail address), or personal information (name, resident registration number, home address, TEL, mobile phone number, e-mail address, etc.).

Digital assets are managed by storing in a private blockchain platform system a unique NFT-based ownership certificate that cannot be tampered with for real assets in a building, owner information, corresponding real asset information, and transaction history and transaction records of real assets.

The private blockchain platform system allows access to the unique NFT-based ownership certificate of real assets stored in the storage of the blockchain node, encrypted ownership information and encrypted real asset information, and asset valuation information of encrypted real assets. Unauthorized third parties cannot change the ownership certificate of real assets.

The owner registered as the owner of the real asset in the building decrypts it (unique NFT-based ownership certificate, encrypted ownership information and encrypted real asset information, and encrypted real asset asset valuation information) to obtain information about the ownership of the real asset In the case of a change in ownership of real assets in the building or a real estate lease contract transaction of real assets of the owner, the owner can request verification of ownership of the real asset from the blockchain platform system and obtain proof of ownership.

Embodiments according to the present invention may be implemented in the form of program instructions that can be executed through various computer means and recorded in a computer readable recording medium. The computer readable recording medium may include program instructions, data files, and data structures alone or in combination. Computer-readable recording media include storage, hard disks, magnetic media such as floppy disks and magnetic tapes, optical media such as CD-ROMs and DVDs, and magnetic media such as floptical disks. - A hardware device configured to store and execute program instructions in storage media such as magneto-optical media, ROM, RAM, flash memory, etc. may be included. Examples of program instructions may include those produced by a compiler and machine language codes as well as high-level language codes that can be executed by a computer using an interpreter. The hardware device may be configured to operate as one or more software modules to perform the operations of the present invention.

As described above, the method of the present invention is implemented as a program and can be read using computer software on a recording medium (CD-ROM, RAM, ROM, memory card, hard disk, magneto-optical disk, storage device, etc.) ) can be stored in

Although described with reference to specific embodiments of the present invention, the present invention is not limited to the same configuration and operation as the specific embodiments to illustrate the technical idea as described above, and within the limit that does not deviate from the technical spirit and scope of the present invention It can be implemented with various modifications, and the scope of the present invention should be determined by the claims described later.

100: Blockchain platform system (NFT, Blockchain)
200: trading system

Claims (10)

A block that provides real transaction information by storing and managing transaction records for each digital asset in an NFT-based blockchain node a digital photo trading system with a chain platform system; and
Utilizing NFT and block chain technology, including a user terminal (Web, App) connected to the digital photo trading system through a wired/wireless communication network and receiving actual photos, ownership information of the image-processed photos, and actual transaction information Digital asset trading system. According to claim 1,
The user terminal is a digital asset trading system using NFT and block chain technology, using a PC, smartphone, or tablet PC (Web, App) connected to the digital asset management system through a wired or wireless communication network. According to claim 1,
The one or more digital photos are
Original photo enlargement and reduction, image conversion (RGB -> grayscale conversion, YCbCr conversion, HSI conversion), bluring using a blurring mask, sharpening using a sharpening mask, image enlargement/reduction and image compositing technology of modern art A digital asset trading system using NFT and block chain technology, characterized in that it is a photo containing an image shape of the same structure and a new background with image processing applied thereto. According to claim 1,
The digital photo trading system
Webtoons, cartoons, comics, illustrations, industrial design images, industrial design images, 3D graphics and games registered by sellers are given unique NFTs, sold through a blockchain network, and the above content A digital asset trading system using NFT and block chain technology having a viewer for viewing, a 3D viewer having a 3D modeler/3D renderer, and a game player providing a preview. According to claim 1,
The digital photo trading system registers the information of the owner who has registered the one or more digital photos and the desired transaction price, deducts transaction fees, and sells NFTs and block chain technology to buyers by asset value evaluation method or auction method. Utilized digital asset trading system. According to claim 1,
The digital photo trading system uses a private blockchain platform system,
In the blockchain platform system, a blockchain using a unique NFT is allocated to each blockchain node through a distributed P2P network of individuals in a merkle tree structure in which blockchain nodes connected in a chain structure are formed (N1 ,N2,N3,..) After blocks (N1-B1,N2-B2,N3-B3,..), which are transaction ledgers in which P2P transaction data is recorded, are formed, sequentially block chain nodes form a chain structure. A digital asset trading system using NFT and block chain technology. According to claim 6,
The digital asset management system is a unique NFT-based ownership certificate and owner information for real assets (photos) whose asset value is individually evaluated, smart contract management of real asset ownership change, history of real asset ownership change and actual A digital asset trading system using NFT and block chain technology that stores and manages the transaction details and transaction records of asset owners and buyers. According to claim 7,
The private blockchain platform system issues certificates that can record, modify, and delete data in the distributed ledger to participants who are authorized to participate in the private blockchain. Identity verification (idetify), which issues a private key (credential) by verifying the identity of a blockchain node by receiving a Network Certificate certificate;
A distributed ledger that stores and manages data in blockchain nodes diverged by a blockchain ordering service as a basic component of a private blockchain; Manage transaction transactions by storing transaction details and transaction records based on ownership certificates, owner information, real asset copyright owner information, and smart contracts for each real asset, which have proof of ownership of the unique NFT-based real asset by consensus protocol in the private blockchain Transaction;
Digital asset transaction using NFT and blockchain technology, using the Hyperledger Fabric private blockchain platform system that provides a smart contract between the current owner (transferrer) and the transaction party (transferee) when ownership changes by smart contract of real assets system. According to claim 8,
The private blockchain platform system
Ownership certificates of real assets are managed as unique NFTs so that forgery cannot be tampered with. Distributed identity verification module that issues NFT-based DID using blockchain technology;
In the private blockchain platform system, real asset information, real asset value appraised amount information, real asset owner information are registered, NFT-based ownership certificate for each real asset, owner information of real asset, and transaction details and transactions for each real asset Stock, which is used as a distributed storage of blockchain nodes in a private blockchain system and stores records in the owner's blockchain node;
In the private blockchain platform system, after the NFT-based ownership certificate of the real asset (digital asset) registered in the blockchain node of each owner, the encrypted owner information and the real asset information are stored in the storage of the stock, Ownership of Real Assets At the time of the transaction, the current owner of real assets (transferrer) and the authorized transaction party who has paid the corresponding amount specified in the contract in advance (transferee) are authorized transaction parties who have transferred ownership of real assets according to a smart contract. Store unique NFT-based ownership certificates (digital assets) for real assets that are renewed on new blockchain nodes for Assets that manage contract information (transferr/transferee information), transaction details and transaction records for each actual asset; and
The owner of the real asset issues and stores proof of ownership of the real asset to verify the ownership of the real asset stored in the asset at the request of the authorized owner, and when trading the real asset, In the case of a smart contract between the owner and the trading partner, the owner of the real asset controls to allow access to the blockchain node of the owner with the trading partner only when the ownership of the real asset is changed, and the link that connects to the management server A digital asset trading system using NFT and blockchain technology, including According to claim 1,
In the above private blockchain platform system, the contract for changing the ownership of real assets, the smart contract based on the electronic signature between the owner (transferrer) and the transferee in the case of a transaction between the owner of the real asset and the transferee, the contract for changing the ownership of real assets is currently The proof-of-work (PoW) method is used by confirmation by the consensus algorithm between the owner and the transaction party, and the digital photo transaction system is linked with the private blockchain platform system, and the owner of the real asset A digital asset management system using NFT and block chain technology, which uses Proof of Stake (PoS) method for smart contracts that provide investment contracts for real assets of investors.

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