KR102578855B1 - Operating server of nft trading service which enables modification of storage route information, included in nft, and the operating method thereof - Google Patents

Abstract

An operating server for an NFT transaction service that allows modification of content storage path information included in a non-fungible token (NFT) and a method of operating the same are disclosed. The present invention provides a first storage path included in the first NFT from the first electronic terminal of the first member who is the owner of the first NFT corresponding to the first content among the plurality of members subscribed to the NFT transaction service. When an approval request command requesting approval for modifying information is received, the second member who is the creator of the first content approves the modification process for the first storage path information, and all of the plurality of members It relates to an operation server of an NFT transaction service that approves the first member to modify the first storage path information only when the first member does not object to the modification of the first storage path information and a method of operating the same.

Description

The operating server of the NFT transaction service that allows modification of content storage path information included in NFT and its operating method {OPERATING SERVER OF NFT TRADING SERVICE WHICH ENABLES MODIFICATION OF STORAGE ROUTE INFORMATION, INCLUDED IN NFT, AND THE OPERATING METHOD THEREOF}

The present invention relates to an operation server for an NFT transaction service that allows modification of content storage path information included in a Non-Fungible Token (NFT) and a method of operating the same.

NFT (Non-Fungible Token) refers to a 'non-fungible token' and is a virtual asset that cannot be replaced with another token because each token has a unique value.

Recently, the adoption of NFTs has been increasing in various fields such as digital artwork, online sports, and game item trading.

Meanwhile, when issuing an NFT for content, the content itself is generally stored in cloud storage, and the NFT for the content includes storage path information about the cloud storage where the content is stored.

In this regard, because the storage path information cannot be modified, the storage path information for the content cannot be modified even when content stored in cloud storage is transferred to another cloud storage. , there is the inconvenience of having to issue a new NFT for the content.

To solve this, it is necessary to introduce technology to support modifying the storage path information included in NFT.

Additionally, as a way to ensure the reliability of the modified storage path information, when the owner of an NFT wishes to modify the storage path information included in the NFT, approval is obtained from the creator of the content corresponding to the NFT, and the storage path information is Only when no one objects to modifying the information can the introduction of a measure to allow modification of storage path information be considered.

Therefore, research is needed on NFT-related technology that allows modification of content storage path information included in NFT.

The present invention is included in the first NFT from the first electronic terminal of the first member who is the owner of the first NFT corresponding to the first content among the plurality of members subscribed to the NFT (Non-Fungible Token) transaction service. When an approval request command requesting approval for modifying the first storage path information is received, the second member who is the creator of the first content approves the modification process for the first storage path information, An operation server of an NFT transaction service that approves modification of the first storage path information by the first member only when all of the plurality of members do not object to the modification of the first storage path information and its operations By presenting a method, we aim to help owners of NFTs modify the storage path information included in NFTs.

The operation server of the NFT transaction service that enables modification of content storage path information included in the NFT (Non-Fungible Token) according to an embodiment of the present invention is operated by each member of a plurality of members subscribed to the NFT transaction service. Information and a pre-issued public key for each of the plurality of members - a private key forming a key pair with the public key for each of the plurality of members is pre-stored in an electronic terminal owned by each of the plurality of members - A public key storage unit in which a plurality of contents are stored, a plurality of NFTs corresponding to each of a plurality of contents - In each of the plurality of NFTs, storage path information for cloud storage in which the contents corresponding to each NFT are stored. Includes - information about, and information about the owner of each of the plurality of NFTs - the owner of each of the plurality of NFTs is one of the plurality of members - and the creator of each of the plurality of contents - The creator of each of the plurality of contents is one of the plurality of members - NFT information storage unit storing information about, Among the plurality of members, the owner of the first NFT corresponding to the first content When an approval request command requesting approval for modifying the first storage path information included in the first NFT is received from the first electronic terminal of the first member, to the first electronic terminal, A first electronic signature request unit that requests an electronic signature based on first storage path information, in the first electronic terminal, a first individual for whom data about the first storage path information is stored in the first electronic terminal As the first electronic signature value is generated by electronically signing with a key, when the first electronic signature value is received from the first electronic terminal, the first public key for the first member is extracted from the public key storage unit, and then , a first electronic signature verification unit that performs verification of the first electronic signature value based on the first public key. When verification of the first electronic signature value is completed, referring to the NFT information storage unit, After identifying a second member among a plurality of members who is the creator of the first content, a query message asks whether to approve modification of the first storage path information to the second electronic terminal of the second member. While transmitting, a second electronic signature request unit requesting an electronic signature based on the first storage path information, an approval indicating approval to proceed with modification to the first storage path information from the second electronic terminal. At the same time as the message is received, in the second electronic terminal, the data for the first storage path information is electronically signed with the second private key stored in the second electronic terminal, thereby generating a second electronic signature value. When the second electronic signature value is received from the second electronic terminal, the second public key for the second member is extracted from the public key storage unit, and then the second electronic signature is generated based on the second public key. A second electronic signature verification unit that performs verification of the value, and when verification of the second electronic signature value is completed, the first electronic signature is stored on a pre-built public web page so that the plurality of members can access it. A public message posting unit that posts a public notice message indicating that the route information will be modified, and after the public message is posted on the public web page, each of the plurality of members until a preset public notice period has elapsed. If no objection message indicating opposition to modification of the first storage path information is received from any of the electronic terminals, after approval for modifying the first storage path information, to the first electronic terminal, and an approval message transmission unit that transmits an approval message indicating that modification of the first storage path information has been approved.

In addition, a method of operating an operation server of an NFT transaction service that enables modification of content storage path information included in an NFT according to an embodiment of the present invention includes member information of each of a plurality of members subscribed to the NFT transaction service. and a pre-issued public key for each of the plurality of members - a private key that is paired with the public key for each of the plurality of members is pre-stored in an electronic terminal owned by each of the plurality of members. - Maintaining a public key storage unit in which a plurality of contents are stored, a plurality of NFTs corresponding to each of a plurality of contents - Each of the plurality of NFTs is stored in a cloud storage in which contents corresponding to each NFT are stored. Path information is included - information about and information about the owner of each of the plurality of NFTs - the owner of each of the plurality of NFTs is one of the plurality of members - and each of the plurality of contents Maintaining an NFT information storage unit in which information about the creator - the creator of each of the plurality of contents is one of the plurality of members - is stored, among the plurality of members, corresponding to the first content When an approval request command requesting approval for modifying the first storage path information included in the first NFT is received from the first electronic terminal of the first member who is the owner of the first NFT, the first NFT Requesting, from an electronic terminal, an electronic signature based on the first storage path information, at the first electronic terminal, a first individual whose data for the first storage path information is stored in the first electronic terminal As the first electronic signature value is generated by electronically signing with a key, when the first electronic signature value is received from the first electronic terminal, the first public key for the first member is extracted from the public key storage unit, and then , performing verification of the first electronic signature value based on the first public key, when verification of the first electronic signature value is completed, referring to the NFT information storage unit, the plurality of members After confirming the second member who is the creator of the first content, sending a query message to the second electronic terminal of the second member asking whether to approve modification of the first storage path information, Requesting an electronic signature based on the first storage path information, receiving an approval message indicating approval to proceed with modification of the first storage path information from the second electronic terminal, and simultaneously receiving the second electronic signature from the second electronic terminal. In the electronic terminal, as the data for the first storage path information is electronically signed with the second private key stored in the second electronic terminal and a second electronic signature value is generated, the second electronic signature is transmitted from the second electronic terminal. When a signature value is received, extracting a second public key for the second member from the public key storage unit and then performing verification of the second electronic signature value based on the second public key, When verification of the second electronic signature value is completed, posting a public notice message indicating that the first storage path information will be modified on a pre-built public web page so that the plurality of members can access it. and objecting to modification of the first storage path information from all of the electronic terminals of each of the plurality of members until a preset public notice period elapses after the public notice message is posted on the public web page. If an opposing message indicating is not received, after approval for modifying the first storage path information is processed, an approval completion message indicating to the first electronic terminal that modification of the first storage path information has been approved. It includes the step of transmitting.

The present invention is included in the first NFT from the first electronic terminal of the first member who is the owner of the first NFT corresponding to the first content among the plurality of members subscribed to the NFT (Non-Fungible Token) transaction service. When an approval request command requesting approval for modifying the first storage path information is received, the second member who is the creator of the first content approves the modification process for the first storage path information, An operation server of an NFT transaction service that approves modification of the first storage path information by the first member only when all of the plurality of members do not object to the modification of the first storage path information and its operations By presenting a method, it is possible to support the owner of an NFT to modify the storage path information included in the NFT.

Figure 1 is a diagram showing the structure of an operation server for an NFT transaction service that enables modification of content storage path information included in an NFT (Non-Fungible Token) according to an embodiment of the present invention.
Figure 2 is a flowchart showing a method of operating an NFT transaction service operation server that enables modification of content storage path information included in NFT according to an embodiment of the present invention.

Hereinafter, embodiments according to the present invention will be described in detail with reference to the attached drawings. This description is not intended to limit the present invention to specific embodiments, but should be understood to include all changes, equivalents, and substitutes included in the spirit and technical scope of the present invention. In describing each drawing, similar reference numerals are used for similar components, and unless otherwise defined, all terms used in this specification, including technical or scientific terms, are within the scope of common knowledge in the technical field to which the present invention pertains. It has the same meaning as generally understood by those who have it.

In this document, when a part "includes" a certain component, this means that it may further include other components rather than excluding other components, unless specifically stated to the contrary. Additionally, in various embodiments of the present invention, each component, functional block, or means may be composed of one or more subcomponents, and the electrical, electronic, and mechanical functions performed by each component may be electronic. It may be implemented with various known elements or mechanical elements such as circuits, integrated circuits, and ASICs (Application Specific Integrated Circuits), and may be implemented separately or by integrating two or more into one.

Meanwhile, the blocks in the attached block diagram or the steps in the flow chart are computer program instructions that are mounted on the processor or memory of equipment capable of data processing, such as general-purpose computers, special-purpose computers, portable laptop computers, and network computers, and perform designated functions. It can be interpreted to mean. Because these computer program instructions can be stored in a memory provided in a computer device or in a computer-readable memory, the functions described in the blocks of a block diagram or the steps of a flow diagram can be produced as a manufactured product containing instruction means to perform them. It could be. In addition, each block or each step may represent a module, segment, or portion of code that includes one or more executable instructions for executing specified logical function(s). Additionally, it should be noted that in some alternative embodiments, it is possible for functions mentioned in blocks or steps to be executed in a different order. For example, two blocks or steps shown in succession may be performed substantially simultaneously or in reverse order, and in some cases, some blocks or steps may be omitted.

Figure 1 is a diagram showing the structure of an operation server for an NFT transaction service that enables modification of content storage path information included in an NFT (Non-Fungible Token) according to an embodiment of the present invention.

Referring to Figure 1, the operation server 110 of the NFT transaction service according to an embodiment of the present invention includes a public key storage unit 111, an NFT information storage unit 112, a first electronic signature request unit 113, It includes a first electronic signature verification unit 114, a second electronic signature request unit 115, a second electronic signature verification unit 116, and a public message posting unit 117.

The public key storage unit 111 contains member information for each of the plurality of members 131, 132, and 133 subscribed to the NFT transaction service, and pre-issued information for each of the plurality of members 131, 132, and 133. The public key is stored.

Here, the private key forming the public key and key pair for each of the plurality of members (131, 132, 133) is the electronic terminal (141, 142, 143) owned by each of the plurality of members (131, 132, 133). ) is pre-saved.

In relation to this, the public key storage unit 111 contains member information for each of a plurality of members 131, 132, and 133 subscribed to the NFT transaction service, and a plurality of members 131, as shown in Table 1 below. 132, 133) A pre-issued public key for each may be stored.

Multiple members (131, 132, 133) Profile public key member 1 Member Information 1 public key 1 member 2 Member Information 2 public key 2 member 3 Member Information 3 public key 3 member 4 Member Information 4 public key 4 ... ... ...

The NFT information storage unit 112 stores information about a plurality of NFTs corresponding to each of a plurality of contents, information about the owner of each of the plurality of NFTs, and information about the creator of each of the plurality of contents. It is done.

Here, each of the plurality of NFTs includes storage path information for cloud storage where content corresponding to each NFT is stored, and the owner of each of the plurality of NFTs and the creator of each of the plurality of contents All are one of multiple members (131, 132, 133).

For example, the NFT information storage unit 112 includes information on a plurality of NFTs corresponding to each of a plurality of contents as shown in Table 2 below, information on the owner of each of the plurality of NFTs, and the plurality of contents Information about each producer may be stored.

Multiple contents Multiple NFTs Multiple NFTs
respective owners Multiple contents
each creator content 1 NFT 1 member 1 member 2 content 2 NFT 2 member 2 member 3 Content 3 NFT 3 member 4 member 1 ... .... ... ...

The first electronic signature request unit 113 sends a message to the first NFT from the first electronic terminal of the first member who is the owner of the first NFT corresponding to the first content among the plurality of members 131, 132, and 133. When an approval request command requesting approval for modifying the included first storage path information is received, an electronic signature based on the first storage path information is requested from the first electronic terminal.

For example, in the operation server 110 of the NFT transaction service, from the first electronic terminal of 'Member 1', the owner of 'NFT 1' corresponding to 'Content 1', the first storage path included in 'NFT 1' Assume that an approval request command is received requesting approval for modifying the information 'storage path information 1'.

Then, the first electronic signature request unit 113 may request an electronic signature based on 'storage path information 1' from the first electronic terminal.

At this time, in the first electronic terminal, 'Public Key 1', which is the public key for 'Member 1', and 'Private Key 1' forming a key pair may be stored, and the NFT transaction service operation server 110 When a request for an electronic signature based on 'storage path information 1' is received, the first electronic terminal electronically signs the data for 'storage path information 1' with 'private key 1' to obtain 'electronic signature value 1'. After creation, 'electronic signature value 1' can be transmitted to the operation server 110 of the NFT transaction service.

In this way, in the first electronic terminal, the data for the first storage path information is electronically signed with the first private key stored in the first electronic terminal and a first electronic signature value is generated, thereby operating the NFT transaction service. When the first electronic signature value is received from the first electronic terminal in the server 110, the first electronic signature verification unit 114 generates the first public key information for the first member from the public key storage unit 111. After extracting the key, verification of the first electronic signature value is performed based on the first public key.

At this time, according to an embodiment of the present invention, when the first electronic signature value is received from the first electronic terminal, the first electronic signature verification unit 114 collects the first public key from the public key storage unit 111. After extracting, it is checked whether the first decryption value generated when the first electronic signature value is decrypted with the first public key matches the data for the first storage path information, and the first decryption value is If it is confirmed that it matches the data for the first storage path information, verification of the first electronic signature value can be completed.

For example, as in the above-described example, as the first electronic terminal transmits 'electronic signature value 1' to the operation server 110 of the NFT transaction service, 'electronic signature value 1' is sent to the operation server 110 of the NFT transaction service. ' is received, the first electronic signature verification unit 114 extracts 'public key 1' for 'member 1' from the public key storage unit 111 as shown in Table 1 above, and then extracts 'electronic signature value 1' It is possible to check whether the first decrypted value generated when the value is decrypted with 'public key 1' matches the data for 'storage path information 1'.

In relation to this, according to the above-described example, 'electronic signature value 1' is an electronic signature value generated by electronically signing the data for 'storage path information 1' in the first electronic terminal with 'private key 1', and 'personal Since 'key 1' is a private key that forms a key pair with 'public key 1', the first electronic signature verification unit 114 confirms that the first decryption value matches the data for 'storage path information 1', Verification of electronic signature value 1' can be completed.

In this way, when the verification of the first electronic signature value is completed by the first electronic signature verification unit 114, the second electronic signature request unit 115 refers to the NFT information storage unit 112, and selects a plurality of members. After confirming the second member who is the creator of the first content among the fields 131, 132, and 133, whether to approve modification of the first storage path information with the second electronic terminal of the second member While transmitting a query message, an electronic signature based on the first storage path information is requested.

For example, as in the above-described example, when verification of 'electronic signature value 1' is completed by the first electronic signature verification unit 114, the second electronic signature request unit 115 performs the same as Table 2 above. Referring to the NFT information storage unit 112, after confirming that the second member who is the creator of 'Content 1' is 'Member 2', 'Storage Path Information 1' is modified to the second electronic terminal of 'Member 2'. You can request an electronic signature based on 'storage path information 1' while transmitting a query message asking whether to approve something.

At this time, in the case where 'member 2' inputs an approval command indicating approval to proceed with modification of 'storage path information 1' to the second electronic terminal in response to the inquiry message, the second electronic terminal Can generate an approval message indicating approval of the modification process for 'Storage Path Information 1' and transmit it to the operation server 110 of the NFT transaction service.

In addition, in the second electronic terminal, 'Public Key 2', which is the public key for 'Member 2', and 'Private Key 2' forming a key pair may be stored, and 'Private Key 2' forming a key pair may be stored in the second electronic terminal, When a request for an electronic signature based on 'storage path information 1' is received, the second electronic terminal electronically signs the data for 'storage path information 1' with 'private key 2' to generate 'electronic signature value 2'. After that, 'electronic signature value 2' can be transmitted to the operation server 110 of the NFT transaction service.

Accordingly, an approval message indicating approval to proceed with modification of the first storage path information is received from the second electronic terminal in the operation server 110 of the NFT transaction service, and in the second electronic terminal, the As the data for the first storage path information is electronically signed with the second private key stored in the second electronic terminal and a second electronic signature value is generated, from the second electronic terminal, the operation server of the NFT transaction service (110) ), when the second electronic signature value is received, the second electronic signature verification unit 116 extracts the second public key for the second member from the public key storage unit 111, and then extracts the second public key from the public key storage unit 111. Based on this, verification is performed on the second electronic signature value.

At this time, according to one embodiment of the present invention, when the second electronic signature value is received at the same time as the approval message is received from the second electronic terminal, the second electronic signature verification unit 116 is connected to the public key storage unit. After extracting the second public key from (111), it is determined whether the second decryption value generated when the second electronic signature value is decrypted with the second public key matches the data for the first storage path information. If it is confirmed that the second decryption value matches the data for the first storage path information, verification of the second electronic signature value can be completed.

For example, as in the above-described example, as the second electronic terminal transmits 'electronic signature value 2' to the operation server 110 of the NFT transaction service, 'electronic signature value 2' is sent to the operation server 110 of the NFT transaction service. ' is received, the second electronic signature verification unit 116 extracts 'public key 2' for 'member 2' from the public key storage unit 111 as shown in Table 1 above, and then extracts 'electronic signature value 2' It is possible to check whether the second decrypted value generated when the value is decrypted with 'public key 2' matches the data for 'storage path information 1'.

In relation to this, according to the above-mentioned example, 'electronic signature value 2' is an electronic signature value generated by electronically signing the data for 'storage path information 1' in the second electronic terminal with 'private key 2', and 'personal Since 'key 2' is a private key that forms a key pair with 'public key 2', the second electronic signature verification unit 116 confirms that the second decryption value matches the data for 'storage path information 1', Verification of electronic signature value 2' can be completed.

In this way, when the verification of the second electronic signature value is completed by the second electronic signature verification unit 116, the public message posting unit 117 creates a dictionary so that a plurality of members 131, 132, and 133 can access it. A public notice message indicating that the first storage path information will be modified is posted on the constructed public notice web page.

The approval completion message transmission unit 118 sends a plurality of members 131 to the operation server 110 of the NFT transaction service until the preset public notice period has elapsed after the public notice message is posted on the public web page. , 132, 133) if no objection message indicating opposition to modification of the first storage path information is received from each of the electronic terminals 141, 142, 143, modifying the first storage path information. After approval processing, an approval completion message indicating that modification of the first storage path information has been approved is transmitted to the first electronic terminal.

Hereinafter, the operations of the public message posting unit 117 and the approval message transmitting unit 118 will be described in detail using an example.

First, as in the above-mentioned example, when verification of 'electronic signature value 2' is completed by the second electronic signature verification unit 116, the public message posting unit 117 sends a message to a plurality of members 131, 132, 133), a public notice message indicating that 'storage path information 1' will be modified can be posted on a pre-built public notice web page that can be accessed.

At this time, the preset disclosure period is '2 weeks', and the NFT transaction service is operated until '2 weeks' have elapsed since the disclosure message was posted on the disclosure web page by the disclosure message posting unit 117. An opposition message indicating opposition to the modification of 'storage path information 1' is not received from all of the electronic terminals 141, 142, 143 of the plurality of members 131, 132, and 133 on the operation server 110. If not, the approval completion message transmission unit 118 processes approval for modifying 'storage path information 1' and then sends an instruction to the first electronic terminal that modification of 'storage path information 1' has been approved. An approval completion message can be sent.

Through this, 'Member 1' can check the approval completion message, confirm that modification of 'Storage Path Information 1' has been approved, and then edit 'Storage Path Information 1'.

That is, the operation server 110 of the NFT transaction service according to the present invention receives the first storage path information from the first electronic terminal of the first member who is the owner of the first NFT corresponding to the first content. When an approval request command requesting approval for modification is received, the second member, who is the creator of the first content, approves the modification process for the first storage path information, and a plurality of members 131, 132, 133) Only when no one objects to the modification of the first storage path information, the first member may approve the modification of the first storage path information.

According to one embodiment of the present invention, the operation server 110 of the NFT transaction service may further include a first transaction generation unit 119 and a first registration request unit 120.

When the approval completion message is completely transmitted to the first electronic terminal by the approval completion message transmission unit 118, the first transaction generator 119 provides information about the first storage path information using a pre-issued private key for the operator. Authorization information indicating that it is approved to modify the first electronic signature value, the second electronic signature value, the operator electronic signature value, and the first storage path information after electronically signing data to generate an operator electronic signature value. Create a first transaction containing .

When the first transaction is generated by the first transaction generator 119, the first registration request unit 120 generates a plurality of node devices 101, 102, 103, and 104 constituting the blockchain network 100. , 105, 106), one of the first node devices is randomly selected, and the first transaction is transmitted to the first node device, while transmitting a request for registration of the first transaction to the blockchain network.

Hereinafter, the operations of the first transaction creation unit 119 and the first registration request unit 120 will be described in detail using an example.

First, as in the above-mentioned example, when it is said that an approval completion message indicating that modification of 'storage path information 1' has been approved has been transmitted to the first electronic terminal by the approval completion message transmission unit 118, the first 1 The transaction generator 119 electronically signs the data for 'storage path information 1' with a pre-issued private key for the operator to generate an 'operator electronic signature value', and then generates 'electronic signature value 1' and 'electronic signature'. You can create 'Transaction 1', which contains authorization information indicating that modifications to 'Value 2', 'Operator Digital Signature Value', and 'Storage Path Information 1' are approved.

Then, the first registration request unit 120 randomly selects the first node device, which is one of the plurality of node devices 101, 102, 103, 104, 105, and 106 constituting the blockchain network 100. You can choose.

At this time, when the first node device is referred to as the node device 101, the first registration request unit 120 transmits 'Transaction 1' to the node device 101, and the blockchain network 100 of 'Transaction 1' You can send a registration request to ).

Accordingly, when the first transaction and the registration request are received from the operation server 110 of the NFT transaction service in the first node device, the first node device blocks the block stored on the memory of the first node device. By creating a first block containing the first transaction based on the previous block linked to the chain data by chain, and linking the first block to the blockchain data by chain, storage of the first block is completed. Then, the first block is propagated to the remaining node devices except the first node device among the plurality of node devices 101, 102, 103, 104, 105, and 106 through the blockchain network 100.

For example, as in the above-mentioned example, the first node device is called the node device 101, and the first registration request unit 120 transmits 'transaction 1' to the node device 101, and 'transaction 1' As a result of transmitting a registration request to the blockchain network 100, when it is said that the node device 101 receives a registration request to the blockchain network 100 for 'Transaction 1' and 'Transaction 1', the node device 101 Generates a first block containing 'Transaction 1' based on the previous block chained to the blockchain data stored on the memory of the node device 101, and chains the first block to the blockchain data. After completing the storage of the first block, the first block is connected to a node device among a plurality of node devices 101, 102, 103, 104, 105, and 106 through the blockchain network 100. It can be propagated to the remaining node devices (102, 103, 104, 105, and 106) except for (101).

Specifically, when the node device 101 receives a registration request for 'Transaction 1' and 'Transaction 1' from the operation server 110 of the NFT transaction service to the blockchain network 100, it connects to the blockchain data in a chain. The first block, which is a new block containing the transaction, can be created by referring to the block header of the previous block. Then, the node device 101 connects the first block to the blockchain data in a chain, so that after completing storage of the first block, the node device 101 transfers the first block to the remaining nodes through the blockchain network 100. It can propagate to devices 102, 103, 104, 105, and 106.

In this way, when the approval completion message is completely transmitted to the first electronic terminal, the operation server 110 of the NFT transaction service according to the present invention generates the approval information and registers it in the blockchain network 100, thereby NFT It can be supported so that participants participating in a transaction can confirm that modification of the first storage path information has been approved through the blockchain network 100.

At this time, according to an embodiment of the present invention, the operation server 110 of the NFT transaction service may further include a second transaction generation unit 121 and a second registration request unit 122.

The second transaction generator 121 is configured to transmit the first storage path information to the second electronic terminal by the first member after the approval completion message is transmitted to the first electronic terminal by the approval completion message transmission unit 118. As the storage path information is modified, when correction information indicating that the first storage path information has been modified to the second storage path information is received from the first electronic terminal, a second transaction including the correction information is generated. do.

When the second transaction is generated by the second transaction generator 121, the second registration request unit 122 is one of the plurality of node devices 101, 102, 103, 104, 105, and 106. A two-node device is randomly selected and the second transaction is transmitted to the second node device, while a request for registration of the second transaction to the blockchain network 100 is transmitted.

Hereinafter, the operations of the second transaction creation unit 121 and the second registration request unit 122 will be described in detail using an example.

First, as in the above-described example, it is assumed that an approval completion message indicating that modification of 'storage path information 1' has been approved has been transmitted to the first electronic terminal by the approval completion message transmission unit 118, and thereafter, , Let us assume that ‘storage path information 1’ has been modified to ‘storage path information 2’ by ‘member 1’.

At this time, the first electronic terminal may generate correction information indicating that 'storage path information 1' has been modified to 'storage path information 2' and transmit it to the operation server 110 of the NFT transaction service.

Accordingly, when the correction information is received by the operation server 110 of the NFT transaction service, the second transaction generator 121 may generate 'Transaction 2' including the correction information.

Then, the second registration request unit 122 may randomly select a second node device, which is one of the plurality of node devices 101, 102, 103, 104, 105, and 106.

At this time, when the second node device is referred to as the node device 102, the second registration request unit 122 transmits 'Transaction 2' to the node device 102, and the blockchain network 100 of 'Transaction 2' You can send a registration request to ).

At this time, when the second transaction and the registration request are received from the operation server 110 of the NFT transaction service, the second node device is connected to the blockchain data stored in the memory of the second node device as a chain. After completing the storage of the second block by creating a second block containing the second transaction based on the block and connecting the second block to the blockchain data as a chain, the blockchain network (100 ), the second block is propagated to the remaining node devices except the second node device among the plurality of node devices 101, 102, 103, 104, 105, and 106.

For example, as in the above-described example, the second node device is called the node device 102, and the second registration request unit 122 transmits ‘transaction 2’ to the node device 102, As the registration request to the blockchain network 100 is transmitted, if the node device 102 receives the registration request to the blockchain network 100 for 'Transaction 2' and 'Transaction 2', the node device 102 Generates a second block containing 'Transaction 2' based on the previous block chained to the blockchain data stored in the memory of the node device 102, and chains the second block to the blockchain data. After completing the storage of the second block, the second block is connected to a node device among a plurality of node devices 101, 102, 103, 104, 105, and 106 through the blockchain network 100. It can be propagated to the remaining node devices (101, 103, 104, 105, and 106) except for (102).

In this way, the operation server 110 of the NFT transaction service according to the present invention, when the first storage path information is modified to the second storage path information by the first member, sends the correction information to the blockchain network 100. By registering in , it is possible to support participants participating in NFT transactions to confirm that the first storage path information has been modified to the second storage path information through the blockchain network 100.

In addition, according to an embodiment of the present invention, the operation server 110 of the NFT transaction service includes an authentication matrix storage unit 123, a random generator 124, an encryption matrix generator 125, and a third electronic signature request. It may further include a unit 126, a confirmation unit 127, and a disapproval completion message transmission unit 128.

The authentication matrix storage unit 123 stores an authentication matrix of size n x n (n is a natural number of 2 or more) that is pre-shared with the electronic terminals of each of the plurality of members.

Here, the authentication matrix is a matrix composed of components of '1' and '0', and is pre-stored in the electronic terminal of each of the plurality of members, and among the n ² components constituting the authentication matrix One component is designated as '1', and the remaining n ² -1 components are designated as '0'.

For example, let n be '3', and the authentication matrix of size '3 In the case of ', the authentication matrix storage unit 123 contains ' ' may be stored.

The random generator 124 is a plurality of members 131, 132, 133 after the public message is posted on the public web page by the public message posting section 117 and before the public notice period elapses. ), when an opposition message indicating opposition to modification of the first storage path information is received from a third electronic terminal of a third member, one random data and n ² -1 dummy data are generated randomly.

When the 1 random data and n ² -1 dummy data are randomly generated by the random generator 124, the encryption matrix generator 125 generates n ² from the authentication matrix, which constitutes the authentication matrix. Among the components, the component designated as '1' is replaced with the one random data, and the n ² -1 components designated as '0' are replaced one by one with the n ² -1 dummy data, Create an encryption matrix of nxn size.

When the encryption matrix is generated by the encryption matrix generator 125, the third electronic signature request unit 126 transmits the encryption matrix to the third electronic terminal and creates an electronic signature based on the random data. request.

The confirmation unit 127 calculates the Hadamard product between the encryption matrix and the authentication matrix in the third electronic terminal to generate an nxn-sized operation matrix, and n ² constituting the operation matrix. After the first component other than '0' is extracted from among the components, the first component is electronically signed with the third private key stored in the third electronic terminal, thereby generating a third electronic signature value. When the third electronic signature value is received from the electronic terminal, the third public key for the third member is extracted from the public key storage unit 111, and then the third electronic signature value is decrypted with the third public key. It is checked whether the third decryption value generated matches the random data.

Here, the Hadamard product refers to the operation of multiplying each component in a matrix of the same size. When there are matrices '[a b c]' and '[x y z]', if the Hadamard product between the two matrices is calculated, the corresponding operation matrix can be expressed as '[ax by cz]'.

If the third decryption value is confirmed to match the random data by the confirmation unit 127, the disapproval completion message transmission unit 128 disapproves the modification of the first storage path information, and then disapproves the modification of the first storage path information. 1 A disapproval completion message indicating that modification of the first storage path information is disapproved is transmitted to the electronic terminal.

Hereinafter, the operations of the random generator 124, the encryption matrix generator 125, the third electronic signature request unit 126, the verification unit 127, and the disapproval completion message transmission unit 128 will be described in detail, for example. Let me explain.

First, as in the above-mentioned example, n is set to '3', the public notice period is set to '2 weeks', and the public notice message is posted on the public web page by the public notice message posting unit 117. Afterwards, let us assume that before 'two weeks' have elapsed, an opposition message indicating opposition to the modification of 'storage path information 1' is received from the third electronic terminal of 'member 3'.

At this time, the random generator 124 may randomly generate random data 'R' and '8' pieces of dummy data 'D1, D2, D3, D4, D5, D6, D7, D8'.

Then, the encryption matrix generator 125 generates the authentication matrix ' ', among the '9' components constituting the authentication matrix, the component designated as '1' is replaced with 'R', and the '8' components designated as '0' are replaced with '8'. By replacing one by one the dummy data 'D1, D2, D3, D4, D5, D6, D7, D8', an encryption matrix of size '3 x 3' can be created.

At this time, the encryption matrix generator 125 replaces '8' components for which '0' is designated among the '9' components constituting the authentication matrix one by one with '8' dummy data. , they can be replaced one by one sequentially from the left column to the right column and from the top row to the bottom row. That is, the encryption matrix generator 125 generates '1st row 1 column, 1st row 2 columns, 1st row 3 columns, 2nd row 1 column, 2nd row 2 columns, 2nd row 3 columns, 3rd row 1 column' in the authentication matrix. , 3 rows 2 columns, 3 rows 3 columns', '8' components for which '0' is designated among each component can be replaced with '8' pieces of dummy data.

In relation to this, the authentication matrix ' Since the component of '1st row, 1st column' of ' is '0', the encryption matrix generator 125 sets the component of '1st row, 1st column' of the authentication matrix to ', which is one of '8' dummy data. It can be replaced with D1'. In addition, since the component of '1 row, 2 columns' of the authentication matrix is '1', the encryption matrix generator 125 uses the component of '1 row, 2 columns' of the authentication matrix as 'R', which is the random data. It can be replaced with '.

In this way, the encryption matrix generator 125 generates the authentication matrix ' ', among the '9' components constituting the authentication matrix, the component designated as '1' is replaced with 'R', and the '8' components designated as '0' are replaced with '8'. By replacing one by one the dummy data 'D1, D2, D3, D4, D5, D6, D7, D8', an encryption matrix of size '3 x 3' is created as ' It can be created like this:

Then, the third electronic signature request unit 126 is the third electronic terminal, and the encryption matrix ' While transmitting ', an electronic signature based on the random data 'R' can be requested.

At this time, the authentication matrix ' ', 'Public key 3', which is the public key for 'Member 3', and 'Private key 3' forming a key pair may be stored, and from the operation server 110 of the NFT transaction service, the encryption matrix ' 'And, when an electronic signature request based on the random data 'R' is received, ' 'class ' ' Calculate the Hadamard product between It can be created like this:

At this time, the operation matrix ' Among the '9' components constituting ', the component that is not '0' is 'R', so the third electronic terminal can extract 'R' as the first component from the operation matrix. Then, the third electronic terminal electronically signs 'R' with 'private key 3' to generate 'electronic signature value 3', and then sends 'electronic signature value 3' to the operation server 110 of the NFT transaction service. Can be transmitted.

Accordingly, when 'electronic signature value 3' is received in the operation server 110 of the NFT transaction service, the confirmation unit 127 receives information about 'member 3' from the public key storage unit 111 as shown in Table 1 above. After extracting 'public key 3', it can be confirmed whether the third decryption value generated when 'electronic signature value 3' is decrypted with 'public key 3' matches the random data 'R'.

At this time, 'electronic signature value 3' is an electronic signature value generated by electronically signing the random data 'R' with 'private key 3' in the third electronic terminal, and 'private key 3' is 'public key 3'. Since it is a private key that forms a key pair with ', the verification unit 127 can confirm that the third decryption value matches the random data 'R'.

Then, the disapproval completion message transmission unit 128 processes disapproval for modifying 'storage path information 1' and then sends a disapproval completion message to the first electronic terminal indicating that modifying 'storage path information 1' is disapproved. Messages can be sent.

That is, if one of the plurality of members 131, 132, and 133 objects to the modification of the first storage path information, the operation server 110 of the NFT transaction service according to the present invention To prevent members from modifying the first storage path information, modification of the first storage path information may be disapproved.

Figure 2 is a flowchart showing a method of operating an NFT transaction service operation server that enables modification of content storage path information included in NFT according to an embodiment of the present invention.

In step S210, member information for each of the plurality of members subscribed to the NFT transaction service, and a pre-issued public key for each of the plurality of members (public key and key pair for each of the plurality of members) Iru maintains a public key storage unit in which the private key (pre-stored in an electronic terminal owned by each of the plurality of members) is stored.

In step S220, a plurality of NFTs corresponding to each of a plurality of contents (each of the plurality of NFTs includes storage path information for cloud storage in which the content corresponding to each NFT is stored) Information, information about the owner of each of the plurality of NFTs (the owner of each of the plurality of NFTs is one of the plurality of members), and the creator of each of the plurality of contents (each of the plurality of contents The creator of is one of the plurality of members) and maintains an NFT information storage unit in which information about the member is stored.

In step S230, from the first electronic terminal of the first member who is the owner of the first NFT corresponding to the first content among the plurality of members, the first storage path information included in the first NFT is modified. When an approval request command requesting approval is received, an electronic signature based on the first storage path information is requested from the first electronic terminal.

In step S240, in the first electronic terminal, the data for the first storage path information is electronically signed with the first private key stored in the first electronic terminal, thereby generating a first electronic signature value. 1 When the first electronic signature value is received from the electronic terminal, the first public key for the first member is extracted from the public key storage unit, and then, based on the first public key, the first electronic signature value Perform verification.

In step S250, when verification of the first electronic signature value is completed, the NFT information storage unit is referred to, and a second member who is the creator of the first content among the plurality of members is confirmed, and then the second member A query message inquiring whether to approve modification of the first storage path information is transmitted to the second electronic terminal, and an electronic signature based on the first storage path information is requested.

In step S260, an approval message indicating approval to proceed with modification of the first storage path information is received from the second electronic terminal, and at the same time, the second electronic terminal As data is electronically signed with a second private key stored in the second electronic terminal and a second electronic signature value is generated, when the second electronic signature value is received from the second electronic terminal, it is stored in the public key storage unit. , After extracting the second public key for the second member, verification of the second electronic signature value is performed based on the second public key.

In step S270, when verification of the second electronic signature value is completed, a public announcement indicating that the first storage path information will be modified is made on a public disclosure web page that is pre-built so that the plurality of members can access it. Post a message.

In step S280, after the public notice message is posted on the public web page, the first storage path information is modified from all electronic terminals of each of the plurality of members until a preset public notice period elapses. If an opposition message indicating opposition is not received, after approval for modifying the first storage path information is processed, an indication is given to the first electronic terminal that modification of the first storage path information has been approved. Sends an approval completion message.

At this time, according to one embodiment of the present invention, in step S240, when the first electronic signature value is received from the first electronic terminal, the first public key is extracted from the public key storage unit, and the first electronic signature value is received from the first electronic terminal. Check whether the first decryption value generated when decrypting the first electronic signature value with a public key matches the data for the first storage path information, and determine whether the first decryption value is in the first storage path information. If it is confirmed that it matches the data, verification of the first electronic signature value can be completed, and in step S260, at the same time as the approval message is received from the second electronic terminal, the second electronic signature When the value is received, the second decrypted value generated when the second public key is extracted from the public key storage unit and the second electronic signature value is decrypted with the second public key is stored in the first storage path information. If it is confirmed that the second decrypted value matches the data for the first storage path information, verification of the second electronic signature value can be completed.

In addition, according to an embodiment of the present invention, the method of operating the operation server of the NFT transaction service is when the approval completion message is completed to be transmitted to the first electronic terminal, using the pre-issued private key for the operator, the first storage path After electronically signing data about information to generate an operator electronic signature value, indicating that modification of the first electronic signature value, the second electronic signature value, the operator electronic signature value and the first storage path information is approved generating a first transaction containing approval information, and when the first transaction is generated, randomly selecting a first node device, which is one of a plurality of node devices constituting the blockchain network, and It may further include transmitting a registration request for the first transaction to the blockchain network while transmitting the first transaction to a 1 node device, wherein the first node device operates the NFT transaction service. When the first transaction and the registration request are received from the server, a first block containing the first transaction is generated based on the previous block chained to the blockchain data stored in the memory of the first node device. And, by connecting the first block to the blockchain data in a chain, after completing storage of the first block, the first block is transferred to the first block among the plurality of node devices through the blockchain network. It can be propagated to all node devices except the node device.

At this time, according to an embodiment of the present invention, the operating method of the operation server of the NFT transaction service is after the approval completion message is completed transmitted to the first electronic terminal, by the first member, the first storage path information As is modified to the second storage path information, when correction information indicating that the first storage path information has been modified to the second storage path information is received from the first electronic terminal, the second storage path information including the correction information Generating a transaction and when the second transaction is generated, randomly selecting a second node device among the plurality of node devices and transmitting the second transaction to the second node device, It may further include the step of transmitting a registration request for a 2 transaction to the blockchain network, wherein the second node device receives the second transaction and the registration request from the operating server of the NFT transaction service, Generate a second block containing the second transaction based on a previous block chained to the blockchain data stored in the memory of the second node device, and chain the second block to the blockchain data. By connecting, after completing the storage of the second block, the second block can be propagated to the remaining node devices except the second node device among the plurality of node devices through the blockchain network.

In addition, according to an embodiment of the present invention, the method of operating the operation server of the NFT transaction service includes an authentication matrix of size nxn (n is a natural number of 2 or more) that is pre-shared with the electronic terminal of each of the plurality of members. (The authentication matrix is a matrix composed of components of '1' and '0', and is pre-stored in the electronic terminal of each of the plurality of members, and 1 of the n ² components constituting the authentication matrix is maintaining a matrix storage unit for authentication in which (n components are designated as '1' and the remaining n ² -1 components are designated as '0'), and the disclosure message on the disclosure web page. After is posted, but before the disclosure period elapses, an opposition message indicating opposition to the modification of the first storage path information is received from a third electronic terminal of a third member, one of the plurality of members. If so, randomly generating 1 random data and n ² -1 dummy data, when the 1 random data and n ² -1 dummy data are randomly generated, in the authentication matrix, the authentication matrix Among the n ² components constituting , the component designated as '1' is replaced with the 1 random data, and the n ² -1 components designated as '0' are replaced with the n ² -1 dummy data. generating an encryption matrix of size nxn by replacing them one by one; when the encryption matrix is generated, a third electronic terminal transmits the encryption matrix to the third electronic terminal and requests an electronic signature based on the random data. In the electronic signature request unit, the third electronic terminal, the Hadamard product between the encryption matrix and the authentication matrix is calculated to generate an operation matrix of size nxn, and '0' among the n ² components constituting the operation matrix After the first component is extracted, the first component is electronically signed with the third private key stored in the third electronic terminal to generate a third electronic signature value, and the third electronic signature is generated from the third electronic terminal. When the electronic signature value is received, the third public key for the third member is extracted from the public key storage unit, and the third decryption value generated when the third electronic signature value is decrypted with the third public key is , checking whether it matches the random data, and if it is confirmed that the third decryption value matches the random data, disapproval of modifying the first storage path information, and then processing the first electronic terminal. The method may further include transmitting a disapproval completion message indicating that modification of the first storage path information is disapproved.

Above, with reference to FIG. 2, a method of operating an NFT transaction service operation server that enables modification of content storage path information included in an NFT according to an embodiment of the present invention has been described. Here, the operating method of the operation server of the NFT transaction service that enables modification of the content storage path information included in the NFT according to an embodiment of the present invention is the operation server 110 of the NFT transaction service described using FIG. 1. Since it may correspond to the configuration of the operation, a more detailed description thereof will be omitted.

The operating method of the NFT transaction service operation server that enables modification of the content storage path information included in the NFT according to an embodiment of the present invention may be implemented as a computer program stored in a storage medium for execution through combination with a computer. You can.

In addition, the method of operating the operation server of the NFT transaction service that enables modification of content storage path information included in the NFT according to an embodiment of the present invention is implemented in the form of program instructions that can be executed through various computer means. Can be recorded on a readable medium. The computer-readable medium may include program instructions, data files, data structures, etc., singly or in combination. Program instructions recorded on the medium may be specially designed and constructed for the present invention or may be known and usable by those skilled in the art of computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tapes, optical media such as CD-ROMs and DVDs, and magnetic media such as floptical disks. -Includes optical media (magneto-optical media) and hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, flash memory, etc. Examples of program instructions include machine language code, such as that produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter, etc.

As described above, the present invention has been described with specific details such as specific components and limited embodiments and drawings, but this is only provided to facilitate a more general understanding of the present invention, and the present invention is not limited to the above embodiments. , those skilled in the art can make various modifications and variations from this description.

Accordingly, the spirit of the present invention should not be limited to the described embodiments, and the scope of the patent claims described below as well as all modifications that are equivalent or equivalent to the scope of this patent claim shall fall within the scope of the spirit of the present invention. .

110: Operation server of NFT transaction service that enables modification of content storage path information included in NFT (Non-Fungible Token)
111: public key storage unit 112: NFT information storage unit
113: first electronic signature request unit 114: first electronic signature verification unit
115: second electronic signature request unit 116: second electronic signature verification unit
117: Public message posting unit 118: Approval message sending unit
119: first transaction creation unit 120: first registration request unit
121: second transaction creation unit 122: second registration request unit
123: Authentication matrix storage unit 124: Random generation unit
125: Encryption matrix generation unit 126: Third electronic signature request unit
127: Confirmation unit 128: Disapproval completion message transmission unit
131, 132, 133: Multiple members
141, 142, 143: Electronic terminals owned by multiple members
100: Blockchain network
101, 102, 103, 104, 105, 106: multiple node devices

Claims (12)

In the operation server of the NFT transaction service that allows modification of content storage path information included in the NFT (Non-Fungible Token),
Member information for each of the plurality of members subscribed to the NFT transaction service, a pre-issued public key for each of the plurality of members - a private key forming a key pair with the public key for each of the plurality of members, a public key storage unit in which - is stored in advance in an electronic terminal owned by each of the plurality of members;
Information on a plurality of NFTs corresponding to each of a plurality of contents - each of the plurality of NFTs includes storage path information for cloud storage in which the content corresponding to each NFT is stored - and the plurality of NFTs Information on the owner of each of the NFTs - the owner of each of the plurality of NFTs is one of the plurality of members - and the creator of each of the plurality of contents - the creator of each of the plurality of contents is the plurality of members One of the members of - NFT information storage where information about is stored;
Among the plurality of members, approval is given for modifying the first storage path information included in the first NFT from the first electronic terminal of the first member who is the owner of the first NFT corresponding to the first content. a first electronic signature request unit that requests, from the first electronic terminal, an electronic signature based on the first storage path information when an approval request command is received;
In the first electronic terminal, the data for the first storage path information is electronically signed with the first private key stored in the first electronic terminal to generate a first electronic signature value, thereby generating the first electronic signature value from the first electronic terminal. When the first electronic signature value is received, the first public key for the first member is extracted from the public key storage unit, and then verification of the first electronic signature value is performed based on the first public key. a first electronic signature verification unit;
When verification of the first electronic signature value is completed, refer to the NFT information storage unit, identify a second member who is the creator of the first content among the plurality of members, and then use the second electronic terminal of the second member. a second electronic signature request unit that requests an electronic signature based on the first storage path information while transmitting a query message asking whether to approve modification of the first storage path information;
At the same time that an approval message indicating approval to proceed with modification of the first storage path information is received from the second electronic terminal, data on the first storage path information is transmitted to the second electronic terminal. As the second electronic signature value is generated by electronically signing with the second private key stored in the electronic terminal, when the second electronic signature value is received from the second electronic terminal, the second electronic signature value is received from the public key storage unit. a second electronic signature verification unit that extracts a second public key for and then verifies the second electronic signature value based on the second public key;
When verification of the second electronic signature value is completed, a public notice message indicating that the first storage path information will be modified is posted on a pre-built public web page so that the plurality of members can access it. message posting section; and
After the public notice message is posted on the public web page, an instruction is made to oppose modification of the first storage path information from all electronic terminals of each of the plurality of members until a preset public notice period has elapsed. If a counter message is not received, after approval for modifying the first storage path information is processed, an approval completion message is sent to the first electronic terminal indicating that modification of the first storage path information has been approved. Transmitting approval message transmission unit
The operating server of the NFT transaction service including. According to paragraph 1,
The first electronic signature verification unit
When the first electronic signature value is received from the first electronic terminal, the first public key is extracted from the public key storage unit and the first electronic signature value is decrypted with the first public key. Check whether the decryption value matches the data for the first storage path information, and if it is confirmed that the first decryption value matches the data for the first storage path information, the first electronic signature value Complete verification and process,
The second electronic signature verification unit
When the second electronic signature value is received at the same time as the approval message is received from the second electronic terminal, the second public key is extracted from the public key storage unit, and then the second electronic signature is performed using the second public key. It is confirmed whether the second decrypted value generated when the value is decrypted matches the data for the first storage path information, and the second decrypted value is confirmed to match the data for the first storage path information. When done, the operation server of the NFT transaction service, characterized in that the verification of the second electronic signature value is completed. According to paragraph 1,
When the approval completion message is completed transmitted to the first electronic terminal, an operator electronic signature value is generated by electronically signing the data for the first storage path information using a pre-issued private key for the operator, and then the first electronic signature is performed. a first transaction generator that generates a first transaction including approval information indicating that modification of the value, the second electronic signature value, the operator electronic signature value, and the first storage path information is approved; and
When the first transaction is generated, a first node device, which is one of a plurality of node devices constituting a blockchain network, is randomly selected, and the first transaction is transmitted to the first node device. 1 A first registration request unit that transmits a registration request for a transaction to the blockchain network
It further includes,
The first node device is
When the first transaction and the registration request are received from the operation server of the NFT transaction service, the first transaction is included based on the previous block linked to the chain in the blockchain data stored on the memory of the first node device. After completing storage of the first block by creating a first block and connecting the first block to the blockchain data as a chain, the first block is transferred to the plurality of nodes through the blockchain network. An operating server for an NFT transaction service, characterized in that it propagates to the remaining node devices except the first node device among the devices. According to paragraph 3,
After the approval completion message is completed transmitted to the first electronic terminal, the first storage path information is modified to the second storage path information by the first member, so that the first storage path information is changed from the first electronic terminal to the first storage path information. a second transaction generator that generates a second transaction including the correction information when correction information indicating that the path information has been modified to the second storage path information is received; and
When the second transaction is generated, a second node device, which is one of the plurality of node devices, is randomly selected, the second transaction is transmitted to the second node device, and the blockchain of the second transaction is generated. A second registration request unit that transmits a registration request to the network
It further includes,
The second node device is
When the second transaction and the registration request are received from the operation server of the NFT transaction service, the second transaction is included based on the previous block linked to the chain in the blockchain data stored on the memory of the second node device. After completing the storage of the second block by creating a second block and connecting the second block to the blockchain data as a chain, the second block is transferred to the plurality of nodes through the blockchain network. An operating server for an NFT transaction service, characterized in that it propagates to the remaining node devices except the second node device among the devices. According to paragraph 1,
An authentication matrix of size nxn (n is a natural number of 2 or more) that is pre-shared with the electronic terminals of each of the plurality of members - the authentication matrix is a matrix composed of components of '1' and '0', It is pre-stored in the electronic terminal of each of a plurality of members, and one of the n ² components constituting the authentication matrix is designated as '1', and the remaining n ² -1 components are '0'. Designated as -Authentication matrix storage where this is stored;
Modification of the first storage path information from a third electronic terminal of a third member, one of the plurality of members, after the public notice message is posted on the public web page and before the public notice period elapses. a random generator that randomly generates 1 random data and n ² -1 dummy data when an opposition message indicating opposition is received;
When the 1 random data and n ² -1 dummy data are randomly generated, in the authentication matrix, the component for which '1' is designated among the n ² components constituting the authentication matrix is selected as the one an encryption matrix generator that generates an encryption matrix of size nxn by replacing random data and n ² -1 components designated as '0' with the n ² -1 dummy data;
When the encryption matrix is generated, a third electronic signature request unit transmits the encryption matrix to the third electronic terminal and requests an electronic signature based on the random data;
In the third electronic terminal, the Hadamard product between the encryption matrix and the authentication matrix is calculated to generate an nxn-sized operation matrix, and among the n ² components constituting the operation matrix, '0' After the first component is extracted, the first component is electronically signed with the third private key stored in the third electronic terminal to generate a third electronic signature value, and the third electronic signature is generated from the third electronic terminal. When the electronic signature value is received, the third public key for the third member is extracted from the public key storage unit, and the third decryption value generated when the third electronic signature value is decrypted with the third public key is , a confirmation unit that checks whether it matches the random data; and
If it is confirmed that the third decryption value matches the random data, the modification of the first storage path information is disapproved, and then the first electronic terminal is disapproved of modifying the first storage path information. A disapproval completion message transmission unit that transmits a disapproval completion message indicating that
The operating server of the NFT transaction service further includes. In the method of operating the operation server of the NFT transaction service that allows modification of content storage path information included in the NFT (Non-Fungible Token),
Member information for each of the plurality of members subscribed to the NFT transaction service, a pre-issued public key for each of the plurality of members - a private key forming a key pair with the public key for each of the plurality of members, maintaining a public key storage unit in which - is stored in advance in an electronic terminal owned by each of the plurality of members;
Information on a plurality of NFTs corresponding to each of a plurality of contents - each of the plurality of NFTs includes storage path information for cloud storage in which the content corresponding to each NFT is stored - and the plurality of NFTs Information on the owner of each of the NFTs - the owner of each of the plurality of NFTs is one of the plurality of members - and the creator of each of the plurality of contents - the creator of each of the plurality of contents is the plurality of members One of the members of - Maintaining an NFT information storage unit in which information about is stored;
Among the plurality of members, approval is given for modifying the first storage path information included in the first NFT from the first electronic terminal of the first member who is the owner of the first NFT corresponding to the first content. When an approval request command requesting an approval is received, a first electronic signature request unit requests an electronic signature based on the first storage path information from the first electronic terminal;
In the first electronic terminal, the data for the first storage path information is electronically signed with the first private key stored in the first electronic terminal to generate a first electronic signature value, thereby generating the first electronic signature value from the first electronic terminal. When the first electronic signature value is received, the first electronic signature verification unit extracts the first public key for the first member from the public key storage unit, and then, based on the first public key, the first electronic signature verification unit extracts the first public key for the first member from the public key storage unit. performing verification on the signature value;
When verification of the first electronic signature value is completed, the second electronic signature request unit refers to the NFT information storage unit, identifies a second member among the plurality of members who is the creator of the first content, and then identifies the second member who is the creator of the first content. requesting an electronic signature based on the first storage path information while transmitting, to a second electronic terminal of a second member, an inquiry message asking whether to approve modifying the first storage path information;
At the same time that an approval message indicating approval to proceed with modification of the first storage path information is received from the second electronic terminal, data on the first storage path information is transmitted to the second electronic terminal. As the second electronic signature value is generated by being electronically signed with the second private key stored in the electronic terminal, when the second electronic signature value is received from the second electronic terminal, the second electronic signature verification unit stores the public key. extracting a second public key for the second member from a copy, and then performing verification of the second electronic signature value based on the second public key;
When verification of the second electronic signature value is completed, the public message posting unit provides a notice indicating that the first storage path information will be modified on the public web page that is pre-built so that the plurality of members can access it. Posting a message; and
After the public notice message is posted on the public web page, an instruction is made to oppose modification of the first storage path information from all electronic terminals of each of the plurality of members until a preset public notice period has elapsed. If the opposite message is not received, the approval completion message transmitting unit processes approval for modifying the first storage path information, and then sends a message to the first electronic terminal indicating that modification of the first storage path information has been approved. Step of transmitting an approval completion message indicating
A method of operating an operation server of an NFT transaction service including. According to clause 6,
The step of performing verification on the first electronic signature value is
When the first electronic signature value is received from the first electronic terminal, the first electronic signature verification unit extracts the first public key from the public key storage unit, and then uses the first public key as the first electronic signature value. Check whether the first decryption value generated when decrypting matches the data for the first storage path information, and if it is confirmed that the first decryption value matches the data for the first storage path information, , complete verification of the first electronic signature value, and
The step of performing verification of the second electronic signature value is
When the second electronic signature value is received at the same time as the approval message is received from the second electronic terminal, the second electronic signature verification unit extracts the second public key from the public key storage unit, and then extracts the second electronic signature value from the public key storage unit. 2 Check whether the second decryption value generated when the second electronic signature value is decrypted with the public key matches the data for the first storage path information, and the second decryption value is the first storage path information. When confirmed to match the data for, a method of operating an operation server of an NFT transaction service, characterized in that verification of the second electronic signature value is completed. According to clause 6,
When the approval completion message is completely transmitted to the first electronic terminal, the first transaction generator electronically signs the data about the first storage path information using a pre-issued private key for the operator to generate an operator electronic signature value. , generating a first transaction including authorization information indicating that modification of the first electronic signature value, the second electronic signature value, the operator electronic signature value, and the first storage path information is approved; and
When the first transaction is generated, the first registration request unit randomly selects a first node device, which is one of a plurality of node devices constituting the blockchain network, and sends the first transaction to the first node device. Transmitting a registration request for the first transaction to the blockchain network while transmitting
It further includes,
The first node device is
When the first transaction and the registration request are received from the operation server of the NFT transaction service, the first transaction is included based on the previous block linked to the chain in the blockchain data stored on the memory of the first node device. After completing storage of the first block by creating a first block and connecting the first block to the blockchain data as a chain, the first block is transferred to the plurality of nodes through the blockchain network. A method of operating an operation server of an NFT transaction service, characterized in that it propagates to the remaining node devices except the first node device among the devices. According to clause 8,
After the approval completion message is completed transmitted to the first electronic terminal, the first storage path information is modified to the second storage path information by the first member, so that the first storage path information is changed from the first electronic terminal to the first storage path information. When correction information indicating that path information has been modified to the second storage path information is received, generating, by a second transaction generator, a second transaction including the correction information; and
When the second transaction is generated, the second registration request unit randomly selects a second node device, which is one of the plurality of node devices, and transmits the second transaction to the second node device. 2. Sending a request for registration of a transaction to the blockchain network.
It further includes,
The second node device is
When the second transaction and the registration request are received from the operation server of the NFT transaction service, the second transaction is included based on the previous block linked to the chain in the blockchain data stored on the memory of the second node device. After completing the storage of the second block by creating a second block and connecting the second block to the blockchain data as a chain, the second block is transferred to the plurality of nodes through the blockchain network. A method of operating an operation server of an NFT transaction service, characterized in that it propagates to the remaining node devices except the second node device among the devices. According to clause 6,
An authentication matrix of size nxn (n is a natural number of 2 or more) that is pre-shared with the electronic terminals of each of the plurality of members - the authentication matrix is a matrix composed of components of '1' and '0', It is pre-stored in the electronic terminal of each of a plurality of members, and one of the n ² components constituting the authentication matrix is designated as '1', and the remaining n ² -1 components are '0'. Designated as - maintaining a stored authentication matrix storage unit;
Modification of the first storage path information from a third electronic terminal of a third member, one of the plurality of members, after the public notice message is posted on the public web page and before the public notice period elapses. When an opposition message indicating opposition to is received, the random generator randomly generates 1 random data and n ² -1 dummy data;
When the 1 random data and n ² -1 dummy data are randomly generated, the encryption matrix generator generates a device in which '1' is designated among the n ² components constituting the authentication matrix in the authentication matrix. generating an encryption matrix of size nxn by replacing a component with the one random data and replacing n ² -1 components designated with '0' with the n ² -1 dummy data one by one;
When the encryption matrix is generated, a third electronic signature request unit transmits the encryption matrix to the third electronic terminal and requests an electronic signature based on the random data;
In the third electronic terminal, the Hadamard product between the encryption matrix and the authentication matrix is calculated to generate an nxn-sized operation matrix, and among the n ² components constituting the operation matrix, '0' After the first component is extracted, the first component is electronically signed with the third private key stored in the third electronic terminal to generate a third electronic signature value, and the third electronic signature is generated from the third electronic terminal. When the electronic signature value is received, the verification unit extracts the third public key for the third member from the public key storage unit and then decrypts the third electronic signature value with the third public key. Checking whether the decrypted value matches the random data; and
If it is confirmed that the third decryption value matches the random data, the disapproval completion message transmission unit disapproves the modification of the first storage path information, and then sends the first storage path to the first electronic terminal. Transmitting a disapproval completion message indicating that modification of the information has been disapproved.
A method of operating an operation server of an NFT transaction service further comprising: A computer-readable recording medium recording a computer program for executing the method of any one of claims 6 to 10 through combination with a computer. A computer program stored in a storage medium for executing the method of any one of claims 6 to 10 through combination with a computer.

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