WO2023214596A1

WO2023214596A1 - Nft card production method and system

Info

Publication number: WO2023214596A1
Application number: PCT/KR2022/006284
Authority: WO
Inventors: 한동수
Original assignee: 한국과학기술원
Priority date: 2022-05-03
Filing date: 2022-05-03
Publication date: 2023-11-09

Abstract

The present invention relates to an NFT content authentication method, comprising the steps of: receiving an authentication request including a user ID and a unique ID of an NFT card from a portable terminal that recognizes the NFT card through a camera sensor; determining an owner of NFT content linked to the unique ID; authenticating the authentication request using the owner information of the determined owner; and transmitting authentication data indicating a result of authentication to the portable terminal.

Description

NFT card production method and system

The present invention relates to a method and system for producing an NFT card, and specifically, an NFT that can increase the sense of ownership of NFT content and increase reliability by linking a physical NFT card to NFT content and playing NFT content through a physically owned NFT card. It relates to card production methods and systems.

Non-fungible tokens (NFTs) are commonly used as an authentication method for the owner (original creator) of digital content such as photos, videos, and sound sources created through digital devices such as smartphones, PCs, and cameras. NFTs created separately from content are recognized as ownership of the digital content and are distributed online (usually in a blockchain environment). NFT is significant in that it provides a means to confirm ownership of digital content created in an online environment where content replication is easy. In the future, if virtual environments such as Metaverse become popular and digital content trading in Metaverse becomes active, the utility of NFT will increase further.

NFT is a token that confirms ownership of digital content and can be traded in a virtual environment. Therefore, in order to associate ownership of specific digital content with an NFT, you must first register the digital content on an NFT registration site for a fee or free of charge and go through the process of issuing an NFT associated with it. Content registered in this way is stored in a content DB that can be managed or accessed by the site, and link information accessible on the Internet is usually stored and distributed in NFT.

Digital content authenticated through NFT is content stored online, so there is a limitation in that the owner cannot feel actual ownership offline or in the field, and it is difficult to prove the actual owner to other users offline. .

In this way, there is a need for an NFT card production method and system that can solve or improve problems arising from digital content using existing NFT.

The present invention was devised to solve the above-mentioned problems, and provides a method and system for producing an NFT card that can increase the sense of ownership of NFT content by linking and owning NFT content stored online to a physical NFT card. The purpose is to provide

In addition, the present invention enables the authentication of the owner of the NFT content corresponding to the identifier included in the NFT card and subsequent playback according to the recognition of the physical NFT card to identify the authenticity of the NFT content and the reliability of the registered NFT content accordingly. The purpose is to provide an NFT card production method and system that can increase .

In addition, the purpose of the present invention is to provide an NFT card production method and system that can easily confirm or estimate the purchase authentication and authenticity of offline products through NFT content and physical NFT cards constructed in connection with offline products. there is.

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

The NFT content authentication method according to an aspect of the present invention includes the steps of the NFT management server receiving an authentication request including the unique ID and user ID of the NFT card from a portable terminal that recognizes the NFT card through a camera sensor; The NFT management server determining the owner of the NFT content linked to the unique ID; The NFT management server authenticating the authentication request using owner information of the determined owner; And a step of the NFT management server transmitting authentication data indicating the result of the authentication to the portable terminal.

In the NFT content authentication method described above, before the step of receiving the authentication request, photograph the NFT card using the camera sensor through an app or web equipped with the portable terminal and extract a unique ID from the photographed photo. steps; And after the step of transmitting the response data to the portable terminal, the portable terminal displays authentic data included in the response data. The step of authenticating the authentication request includes the user ID and the Compare the owner ID of the owner information and configure authentication data according to the result of the comparison.

In the NFT content authentication method described above, after displaying the authenticity data, the portable terminal further includes displaying additional information included in the response data on a display provided, and the NFT content is offline. It includes a photo or video taken when purchasing the product, and the additional information includes a warranty and data indicating the seller or purchaser.

In the NFT content authentication method described above, the step of authenticating the authentication request verifies whether the public key included in the authentication request is the owner's public key using the owner's private key.

In addition, the NFT content authentication system according to an aspect of the present invention receives an authentication request including a user ID and a unique ID of the NFT card from a portable terminal that recognizes the NFT card through a camera sensor, and is linked to the unique ID. It includes; an NFT management server that determines the owner of the NFT content, authenticates the authentication request using the owner information of the determined owner, and transmits authentication data indicating the result of the authentication to the portable terminal.

In the NFT content authentication system described above, the NFT card is photographed using the camera sensor through a provided app or web, a unique ID is extracted from the captured photo, and the unique ID and the user ID of the app or web are included. It further includes; a portable terminal that transmits an authentication request and displays authenticity data included in the received response data, wherein the NFT management server compares the user ID and the owner ID of the owner information and authenticates according to the result of the comparison. Organize the data.

In the NFT content authentication system described above, the portable terminal further displays additional information included in the response data on a display, and the NFT content includes a photo or video taken when purchasing an item offline, Additional information includes data indicating the warranty, seller, or purchaser.

In the NFT content authentication system described above, the NFT management server authenticates the authentication request using the owner's private key to determine whether the public key included in the authentication request is the owner's public key.

In addition, the NFT card production method according to an aspect of the present invention includes the steps of an NFT management server receiving registration data of NFT content through an app, web, or kiosk; The NFT management server stores the NFT content in a content DB using the registration data and issues an NFT token mapped to the NFT content; And a step of the NFT management server issuing an NFT card including a unique ID that can access the NFT content, wherein the unique ID is linked to the ID of the NFT token, and the NFT card is a portable card.

In the above NFT card production method, the step of issuing the NFT card is to adjust the NFT content into an image of a specified size and print a physical card containing the adjusted image, a mark representing the NFT card, and the unique ID through a printer. issue.

In the above-mentioned NFT card production method, it further includes the step of registering the issued NFT card as NFT card content by the NFT management server, wherein the NFT content and the NFT card content have the same NFT token or individual NFT tokens. has

In addition, the NFT card production system according to an aspect of the present invention receives registration data of NFT content, stores the NFT content in a content DB using the registration data, and issues an NFT token mapped to the NFT content, It includes; an NFT management server that issues an NFT card containing a unique ID that can access the NFT content, wherein the unique ID is linked to the ID of the NFT token, and the NFT card is a portable card.

In the above-described NFT card production system, it further includes a portable terminal that transmits registration data of NFT content of a photograph or video taken to the NFT management server, wherein the NFT management server converts the NFT content into an image of a specified size. A physical card containing the adjusted image, a mark representing the NFT card, and the unique ID is issued through a printer.

In the NFT card production system described above, the NFT management server further registers the issued NFT card as NFT card content, and the NFT content and the NFT card content have the same NFT token or individual NFT tokens.

In addition, the NFT card production system according to an aspect of the present invention receives registration data of NFT content, stores the NFT content in a content DB using the registration data, and issues an NFT token mapped to the NFT content, An NFT management server that issues an NFT card containing a unique ID that can access the NFT content; And when purchasing an offline product, an electronic device that takes a photo or video containing the product and transmits the captured registration data to the NFT management server, wherein the unique ID is linked to the ID of the NFT token, and the NFT The card is a portable card.

In the NFT card production system described above, the electronic device is a portable terminal or kiosk.

The NFT card production method and system according to the present invention as described above has the effect of increasing the sense of ownership of NFT content by linking and owning NFT content stored online to a physical NFT card.

In addition, the NFT card production method and system according to the present invention as described above confirms the authenticity of the NFT content by authenticating the owner of the NFT content corresponding to the identifier included in the NFT card and subsequent playback according to the recognition of the physical NFT card. It has the effect of increasing the reliability of identifiable and thus registered NFT content.

In addition, the NFT card production method and system according to the present invention as described above has the effect of easily confirming or estimating the purchase authentication and authenticity of the product offline through NFT content and a physical NFT card constructed in connection with the product offline. There is.

The effects that can be obtained from the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description below. will be.

1 is a diagram illustrating an exemplary NFT content management system.

Figure 2 is a diagram showing an example of a configuration of an NFT management server.

Figure 3 is a diagram showing the main control flow for registration of NFT content and production of an NFT card linked accordingly.

Figure 4 is a diagram showing the main control flow of the authentication and subsequent processing of NFT content associated with an NFT card.

The above-described purpose, features and advantages will become clearer through the detailed description below with reference to the accompanying drawings, and accordingly, those skilled in the art will understand the technical idea of the present invention. It will be easy to implement. Additionally, in describing the present invention, if it is determined that a detailed description of known technologies related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description will be omitted. Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the attached drawings.

1 is a diagram illustrating an exemplary NFT content management system.

The exemplary NFT content management system of FIG. 1 is an NFT card production system that produces and registers an NFT card (300; see FIG. 4), which is a physical card (content card) that specifies NFT content, and/or an NFT card (300). It can be used as all or part of an NFT content authentication system that authenticates NFT content linked to the NFT card 300 according to an authentication request and further reproduces NFT content and outputs various information.

The NFT card production system and/or NFT content authentication system (NFT content management system) includes one or more electronic devices (200; 210, 250, 290) and an NFT management server (100).

The electronic device 200 includes a camera sensor, a processor, and a display, and authenticates the authenticity of the NFT content corresponding to the physical NFT card 300 recognized through the camera sensor through the NFT management server 100 and stores the NFT content. It is a device that can be played. The electronic device 200 is a device used or installed in various environments and situations, and may be, for example, a portable terminal 210, a personal computer 250, or a kiosk 290. The portable terminal 210 may be, for example, a smartphone or a tablet PC, and the kiosk 290 may be a dedicated device designed according to the present invention and placed in a specific location (e.g., a specific shopping mall or public location, etc.).

Portable terminals 210, personal computers 250, and kiosks 290 can be used to create and register NFT content. For example, the electronic device 200, such as a portable terminal 210, a personal computer 250, or a kiosk 290, is installed in a department store, a shopping mall, etc. and takes photos or videos containing the product when purchasing it offline. do. The electronic device 200 may transmit registration data including captured photos or videos and additional registration information to the NFT management server 100 via the Internet. The kiosk 290 may be installed in various other locations other than department stores and shopping malls.

Alternatively (also), the portable terminal 210, personal computer 250, or kiosk 290 may be used to authenticate NFT content through the NFT card 300. The portable terminal 210, personal computer 250, or kiosk 290 captures the NFT card 300 using a camera sensor through an app or web (program) provided in the internal memory and captures the captured photo. Using the information extracted from the NFT card 300, furthermore, the NFT content linked to the NFT card 300 can be authenticated, and depending on the authentication result, the authenticity of the NFT content can be displayed on the display and the NFT content can be played.

The main control flow performed in the electronic device 200, such as the portable terminal 210 or the kiosk 290, will be discussed in more detail below in FIG. 3.

The NFT management server 100 is a server that manages NFT content. The NFT management server 100 registers NFT content produced online or offline through the electronic device 200, issues an NFT card 300 linked to the produced NFT content, or responds to an authentication request through the NFT card 300. Accordingly, the NFT content is authenticated and the corresponding NFT content can be played through the electronic device 200.

The NFT management server 100 may be implemented in various forms. For example, all or part of the NFT management server 100 may be configured to include multiple physically separated servers and a DB, may be configured to include a DB at a single site, or may be implemented as a distributed cloud server. The NFT management server 100 can be implemented according to various known or to be known methods and structures. The NFT management server 100 will be examined in more detail in Figure 2 below.

Figure 2 is a diagram showing an example of a configuration of the NFT management server 100.

As in the example of Figure 2, the NFT management server 100 is configured to include an NFT content registration server 110, an NFT content authentication server 150, and a content DB 190. The example of the configuration block diagram in FIG. 2 shows an example in which the registration and use (authentication) processes are implemented on a separate server, but various modifications may be made.

Looking more closely at the NFT management server 100, the NFT content registration server 110 registers NFT content in the system in conjunction with the electronic device 200 and issues an NFT card 300 linked to the NFT content. The NFT content registration server 110 configures NFT content, metadata of the NFT content, owner information, etc., stores the composed NFT content information in the content DB 190, and issues an NFT token corresponding to the NFT content information. In addition, the NFT content registration server 110 generates a unique ID accessible to the registered NFT content, stores it in the NFT content information, and issues an NFT card 300 including a unique ID and a representative image of the content. Additionally, the NFT content registration server 110 may further store the issued NFT card 300 as one NFT content in the content DB 190.

The issued NFT card 300 is a portable physical card (e.g., rectangular in shape) made of plastic, paper, or metal, and a unique ID and a representative image of the NFT content may be printed on the NFT card 300. The main control flow associated with the NFT content registration server 110 will be examined in more detail in FIG. 3.

The NFT content authentication server 150 authenticates the NFT content through the information identified in the authentication request according to the authentication request received from the electronic device 200 (e.g., portable terminal 210, etc.) and displays the authentication result. Authentication data including additional data is transmitted to the electronic device 200. The NFT content authentication server 150 utilizes information and user ID extracted from the NFT card 300 owned by the user, etc. to allow the holder of the NFT card 300 to use the NFT content corresponding to the NFT card 300. It is designed to verify whether the person is the actual owner. The main control flow performed in the NFT content authentication server 150 will be examined in more detail in FIG. 4.

The content DB 190 stores multiple NFT contents and further NFT card contents. The content DB 190 includes a number of NFT content items, and the NFT content items are configured to specify NFT content for which an NFT token has been issued. The NFT content item includes the ID of the issued NFT token, metadata and owner information of the NFT content, and further includes a unique ID linked to the ID of the NFT token and printed on the NFT card 300.

Additionally, the content DB 190 includes a plurality of NFT card content items, and the NFT card content items include the ID of the NFT token issued for the NFT card 300, a unique ID, and a representative image of the associated NFT content. Specific NFT card content linked to specific NFT content may have the same NFT token or each may have individual NFT tokens.

Figure 3 is a diagram showing the main control flow for registration of NFT content and production of the NFT card 300 linked accordingly.

The control flow of FIG. 3 is performed by the NFT content management system (the NFT card production system) and is preferably controlled by the NFT management server 100 (the NFT content registration server 110).

First, configure NFT content registration data (S11). The electronic device 200 (for example, the portable terminal 210 or the kiosk 290) can register stored content or content generated using a camera sensor or microphone as NFT content. Registered NFT content may be photos, videos, sound content, etc. Alternatively, the registered NFT content may be a photo or video that includes the product or the place where the product was purchased to indicate the purchase of the product when purchasing the product offline at the portable terminal 210 or the kiosk 290, which is a dedicated device.

The electronic device 200 further configures metadata, which is additional information of NFT content, as registration data. Metadata may include, for example, the title and description of the content, information about the creator of the content, consent to issue the NFT card 300 linked to the NFT content, content to be included in the NFT card 300, etc. . The metadata may further include data such as specification and size adjustment of representative images of NFT content to be displayed on the NFT card 300. When purchasing an offline product, metadata may further store (include) additional information related to the purchased product and may further include, for example, a warranty, data indicating the seller or the purchaser.

Additionally, the electronic device 200 further configures owner information as registration data. The initially configured owner information includes data representing the owner of the NFT content to be registered and may further include, for example, a user ID and further a password. The user ID may be an ID or/and an electronic wallet ID used to access the NFT management server 100 on the electronic device 200 (web, app, or kiosk 290).

Thereafter, the NFT management server 100 receives registration data of NFT content from an app, web, or kiosk 290 through the Internet. The NFT management server 100 registers NFT content in the NFT content management system using the received registration data (S13).

The NFT management server 100 stores the NFT content in the content DB 190 using the received registration data and issues an NFT token mapped to the registered NFT content. The NFT management server 100 creates a new NFT content item in the content DB 190 and stores the ID, metadata, and owner information of the NFT token in the newly created NFT content item. The NFT management server 100 can further store NFT content such as photos, sound sources, and videos in new NFT content items of the content DB 190. Alternatively, NFT content may be stored in a distributed storage medium such as IPFS (Inter Planetary File System) or Swarm, and an address (Internet address) that can access the NFT content may be stored in a new NFT content item. The issued NFT token or NFT token ID can be stored in the owner's electronic wallet (e-wallet app), etc.

In addition to the existing known NFT registration procedure, the NFT management server 100 issues an NFT card 300 containing a unique ID that can access the registered NFT content (S15). The NFT management server 100 is equipped with a physical card of a standardized shape having a unique ID uniquely mapped to the registered NFT content, a representative image representing the NFT content, and a mark representing the NFT card 300, or a remote printer. issued through

The NFT management server 100 generates a new unique ID mapped to the NFT content, stores the generated unique ID in the newly created NFT content item, and automatically resizes or images the NFT content according to the information in the metadata. Select and configure the adjusted or selected image as a representative image, and create a physical card containing the representative image, a mark (such as a letter mark or logo mark) representing the NFT card 300, and a unique ID through a printer.

The NFT management server 100 issues a physical card made of plastic, metal, or paper through any connected printer (for example, a printer provided in the kiosk 290 or a printer from a specific card generating company) and issues the issued physical NFT. The card 300 can be delivered offline to the original owner. Here, the NFT card 300 may further include the owner's public key. NFT cards 300 containing representative images of NFT content are all implemented as physical cards of the same form and standardized size and can be carried by the owner, etc. In this way, the unique ID displayed on the NFT card 300 is linked to the ID of the NFT token through the NFT content item, and the NFT card 300 is a portable card.

By carrying the NFT card 300, which is a physical card, the owner can clarify the rights of the original owner of the digital NFT content and the owner can feel a sense of ownership. In addition, even when trading NFT tokens to transfer ownership of NFT content, the printed physical NFT card 300 can be delivered or transferred together.

In addition, the NFT management server 100 further registers the issued NFT card 300 as NFT card content (S17). The NFT management server 100 may create a new NFT card content item and store the ID of the NFT token, unique ID, and representative image of the associated NFT content in the created NFT card content item. Here, NFT card content issued in connection with NFT content may have the same NFT token (ID) or may have different individual NFT tokens (ID).

Through the control flow of FIG. 3 examined above, content generated according to digital content or the purchase of offline items is registered as NFT content, and further, an NFT card 300, which is a physical card, is issued, and NFT card 300 is used through the NFT card 300. Make it available for authentication of content.

Figure 4 is a diagram showing the main control flow of the authentication and subsequent processing of NFT content associated with the NFT card 300.

The control flow of FIG. 4 is performed by the NFT content management system (NFT content authentication system) and is preferably controlled by the NFT management server 100 (NFT content authentication server 150).

First, the portable terminal 210 photographs the NFT card 300 using a camera sensor and extracts a unique ID from the photographed photo (S51). The portable terminal 210 can photograph the NFT card 300 and extract the ID through an app provided in the internal storage memory or the web. The portable terminal 210 is capable of taking pictures and extracting IDs using an electronic wallet app or the web.

As shown in Figure 4, the NFT card 300, which is a rectangular physical card, is configured to include an NFT card mark 310, a unique ID mark 350, and a representative image mark 390, and the portable terminal 210 is A unique ID can be extracted from a taken photo including an NFT card mark (310), a unique ID mark (350), and a representative image mark (390).

The portable terminal 210, which recognizes the NFT card 300 through the provided camera sensor, configures and transmits an authentication request including at least the extracted unique ID and user ID, and the NFT management server 100 receives the authentication request. (S52) Do. The authentication request may further include a password, etc. in addition to the user ID. The user ID may be the user ID in the e-wallet app or on the web. Additionally, the authentication request may further include a public key and a private key provided by the owner, and the public key may be extracted by recognizing what is printed on the NFT card 300.

Upon receiving the authentication request, the NFT management server 100 determines the owner of the NFT content linked to the unique ID of the authentication request through the content DB 190 (S53). The NFT management server 100 searches for an NFT content item having a unique ID of the NFT card 300 captured in the NFT content items of the content DB 190, extracts owner information of the searched NFT content item, and extracts the current NFT content item. The owner can be determined.

The NFT management server 100 authenticates the received authentication request using the determined owner information (S54). The NFT management server 100 compares the ID of the owner information and the received user ID and configures authentication data according to the comparison result. The NFT management server 100 configures authentication data including authenticity data indicating that the product is genuine (and/or the holder of the physical NFT card 300 is the actual owner of the NFT content) when the owner's ID and user ID are the same. Authentication data may further include NFT content (or Internet address) playable on the portable terminal 210 and additional information from metadata of the searched NFT content item. If the owner ID and user ID are different, authentication data including authenticity data indicating a counterfeit or unauthenticated product is constructed.

The NFT management server 100 can authenticate the authentication request using a known public key-private key method. The risk of the card being copied can be prevented by requiring the card to have a public key and the card owner to have a private key. The NFT management server 100 performs authentication using the public key and private key of the authentication request. In addition, the NFT management server 100 matches one NFT content to one NFT card 300, instead of specifying the ownership relationship, issues multiple NFT cards 300 by matching them, and uses them as a reproduction right for NFT content. It can be distributed as an authorization card. The NFT management server 100 can authenticate whether the public key of a specific NFT card 300 corresponds to the private key of the NFT content and allow playback of the NFT content according to the authentication. This alternative authentication method allows the owner of specific NFT content and the reproduction rights holder to be separated, allowing many people (e.g., fans) to reproduce content belonging to a specific owner (e.g., a celebrity or affiliated agency).

The NFT management server 100 transmits authentication data indicating the result of authentication according to authentication to the portable terminal 210 that requested authentication (S55).

The portable terminal 210, which has received the authentication data, displays authenticity data (banner of) indicating genuine or counterfeit products included in the response data on the display (ⓐ in FIG. 4) and determines whether or not NFT content is included according to the authenticity data. Accordingly, the NFT content is played on the display (S56).

Additionally (subsequently), the portable terminal 210 displays additional information included in the response data on the display (S57). The portable terminal 210 can receive and play photos or videos taken when purchasing an offline product as NFT content, and when purchasing a product, a warranty certificate that can authenticate the purchase or genuineness of the product, data indicating the seller or the purchaser are provided as additional information. It can be received and displayed on the display automatically or according to user input (see ⓑ in FIG. 4).

In this way, the NFT management server 100 confirms that the user holding the NFT card 300 is the actual owner of the NFT content corresponding to the unique ID recognized by the NFT card 300, and confirms that the NFT card 300 is connected to the NFT card 300. Ensures that the content is original content. The holder of the NFT card 300 can feel that he or she owns NFT content and can immediately confirm it.

The control flow for NFT content authentication in Figure 4 can be used for purchasing and trading offline items (products) in addition to trading digital content through the Internet (online). For example, when purchasing expensive items such as luxury goods, the luxury goods shop may issue an NFT card 300 that is used to authenticate the product and further authenticate the purchase. A photo or video of the purchased product can be registered as the buyer's NFT content, and a warranty that can be issued at the time of purchase of the product and data about the seller or buyer can be registered as metadata of the NFT content as additional information. The product sales shop issues and prints NFT cards (300) of NFT content registered through the equipped kiosk (290), portable terminal (210), or personal computer (250) and distributes the NFT cards (300) to buyers. You can.

The distributed NFT card 300 can be used to increase the reliability of transactions of used goods by enabling the display of authenticity through the NFT card 300 in subsequent transactions of used goods.

The present invention described above is capable of various substitutions, modifications, and changes without departing from the technical spirit of the present invention to those skilled in the art to which the present invention pertains. It is not limited by the drawings.

Claims

The NFT management server receives an authentication request including a user ID and a unique ID of the NFT card from a portable terminal that recognizes the NFT card through a provided camera sensor;

The NFT management server determining the owner of the NFT content linked to the unique ID;

The NFT management server authenticating the authentication request using owner information of the determined owner; and

Including, comprising the step of the NFT management server transmitting authentication data indicating the result of the authentication to the portable terminal.

NFT content authentication method.
According to paragraph 1,

Before receiving the authentication request, photographing the NFT card using the camera sensor through an app equipped with the portable terminal or the web and extracting a unique ID from the photographed photo; and

After transmitting the response data to the portable terminal, the portable terminal displays true and false data included in the response data,

The step of authenticating the authentication request compares the user ID and the owner ID of the owner information and configures authentication data according to the result of the comparison.

NFT content authentication method.
According to paragraph 2,

After displaying the authentic data, the portable terminal displays additional information included in the response data on a display,

The NFT content includes a photo or video taken when purchasing an offline item, and the additional information includes a warranty, data indicating the seller or the buyer,

NFT content authentication method.
According to paragraph 1,

The step of authenticating the authentication request involves authenticating using the public key and private key included in the authentication request.

NFT content authentication method.
Receive an authentication request including a user ID and a unique ID of the NFT card from a portable terminal that recognizes the NFT card through a provided camera sensor, determine the owner of the NFT content linked to the unique ID, and determine the owner of the determined owner. An NFT management server that authenticates the authentication request using owner information and transmits authentication data indicating the result of the authentication to the portable terminal; including,

NFT content authentication system.
According to clause 5,

Photograph the NFT card using the camera sensor through the provided app or web, extract a unique ID from the captured photo, send an authentication request including the unique ID and the user ID of the app or web, and receive a response. It further includes a portable terminal that displays authentic data included in the data,

The NFT management server compares the owner ID of the user ID and the owner information and configures authentication data according to the result of the comparison,

NFT content authentication system.
According to clause 6,

The portable terminal further displays additional information included in the response data on a display,

The NFT content includes a photo or video taken when purchasing an offline item, and the additional information includes a warranty, data indicating the seller or the buyer,

NFT content authentication system.
According to clause 5,

The NFT management server authenticates the authentication request using the owner's private key to determine whether the public key included in the authentication request is the owner's public key.

NFT content authentication system.
An NFT management server receiving registration data of NFT content through an app, web, or kiosk;

The NFT management server stores the NFT content in a content DB using the registration data and issues an NFT token mapped to the NFT content; and

Including a step of the NFT management server issuing an NFT card containing a unique ID that can access the NFT content,

The unique ID is linked to the ID of the NFT token, and the NFT card is a portable card,

How to make an NFT card.
According to clause 9,

The step of issuing the NFT card involves adjusting the NFT content into an image of a specified size and issuing a physical card including the adjusted image, a mark representing the NFT card, and the unique ID through a printer.

How to make an NFT card.
According to clause 9,

It further includes the step of registering the NFT card issued by the NFT management server as NFT card content,

The NFT content and the NFT card content have the same NFT token or have individual NFT tokens,

How to make an NFT card.
Receive registration data of NFT content, store the NFT content in a content DB using the registration data, issue an NFT token mapped to the NFT content, and issue an NFT card containing a unique ID that can access the NFT content. Includes an NFT management server that issues,

The unique ID is linked to the ID of the NFT token, and the NFT card is a portable card,

NFT card production system.
According to clause 12,

It further includes; a portable terminal that transmits registration data of NFT content of a photo or video taken to the NFT management server,

The NFT management server adjusts the NFT content into an image of a specified size and issues a physical card including the adjusted image, a mark representing the NFT card, and the unique ID through a printer.

NFT card production system.
According to clause 13,

The NFT management server further registers the issued NFT card as NFT card content,

The NFT content and the NFT card content have the same NFT token or have individual NFT tokens,

NFT card production system.
Receive registration data of NFT content, store the NFT content in a content DB using the registration data, issue an NFT token mapped to the NFT content, and issue an NFT card containing a unique ID that can access the NFT content. NFT management server issuing; and

When purchasing an offline product, an electronic device that takes a photo or video containing the product and transmits the captured registration data to the NFT management server; includes,

The unique ID is linked to the ID of the NFT token, and the NFT card is a portable card,

NFT card production system.
According to clause 15,

The electronic device is a portable terminal or kiosk,

NFT card production system.