KR20230030863A - Operating server of nft trading service which enables modification of storage route information, included in nft, and the operating method thereof - Google Patents

Abstract

Disclosed are an operating server of a non-fungible token (NFT) trading service, capable of modifying content storage route information included in NFTs, and an operating method thereof. The present invention relates to an operating server of a non-fungible token (NFT) trading service and an operating method thereof, wherein when, among a plurality of members joining in an NFT trading service, an approval request command for requiring approval of modifying first storage route information contained in a first NFT is received from a first electronic terminal of a first member who is an owner of the first NFT corresponding to first content, a second member, a manufacturer of the first content, approves to proceed modification on the first storage route information, and only when all of the plurality of members do not oppose the modification of the first storage route information, approval of the modification of the first storage route information by the first member is processed.

Description

Operating server of NFT trading service enabling modification of content storage path information included in NFT and its operating method

The present invention relates to an operation server of an NFT transaction service that enables modification of content storage path information included in a non-fungible token (NFT) and an operation method thereof.

NFT (Non-Fungible Token) means 'non-fungible token', and each token has a unique value, so it means a virtual asset that cannot be replaced with other tokens.

Recently, the introduction of NFTs is increasing in various fields such as digital artworks, online sports, game item trading, and the like.

On the other hand, when issuing an NFT for content, in general, the content itself is stored in a cloud storage, and the NFT for the content includes storage path information for the cloud storage in which the content is stored.

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

In order to solve this problem, it is necessary to introduce a technology to support modification of the storage path information included in the NFT.

In addition, as a way to ensure the reliability of the modified storage path information, when the owner of the NFT wants to modify the storage path information included in the NFT, he/she obtains approval from the creator of the content corresponding to the NFT, and the storage path Only when no one opposes the modification of the information, it is possible to consider introducing a method of allowing storage path information to be modified.

Therefore, there is a need for research on NFT-related technologies that enable modification of content storage path information included in NFTs.

Among a plurality of members subscribed to a Non-Fungible Token (NFT) transaction service, the present invention is included in the first NFT from a first electronic terminal of a first member who is an owner of a first NFT corresponding to a first content. When an approval request command for requesting approval for modifying the first storage path information is received, a second member who is a producer of the first content approves the modification process for the first storage path information; Operation server of NFT transaction service that approves the 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 operation thereof By presenting a method, we intend to support the owner of the NFT to modify the storage path information included in the NFT.

An operating server of an NFT transaction service that enables modification of content storage path information included in a non-fungible token (NFT) according to an embodiment of the present invention is 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 a 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 is 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 contents corresponding to each NFT are stored Is included - information on, information on the owner of each of the plurality of NFTs - the owner of each of the plurality of NFTs is any one of the plurality of members - and the producer of each of the plurality of contents -The producer of each of the plurality of contents is any one of the plurality of members -NFT information storage unit in which information about is stored, and the owner of the first NFT corresponding to the first content among the plurality of members 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 requesting unit requesting an electronic signature based on first storage path information, in the first electronic terminal, a first individual whose data for the first storage path information is stored in the first electronic terminal When the first electronic signature value is received from the first electronic terminal as the first electronic signature value is generated by digital signature with the key, the first public key for the first member is extracted from the public key storage unit, and then , Based on the first public key, a first electronic signature verification unit for performing verification of the first electronic signature value Verification of the first electronic signature value is completed If, referring to the NFT information storage unit, after identifying a second member who is a producer of the first content among the plurality of members, modifying the first storage path information with a second electronic terminal of the second member A second electronic signature requesting unit requesting an electronic signature based on the first storage path information while transmitting an inquiry message inquiring whether to approve the first storage path information, from the second electronic terminal, the first storage path information At the same time as an approval message indicating approval of the modification process is received, in the second electronic terminal, the data for the first storage path information is digitally signed with the second private key stored in the second electronic terminal As the second electronic signature value is generated, when the second electronic signature value is received from the second electronic terminal, after extracting the second public key for the second member from the public key storage unit, the second electronic signature value is generated. Based on the public key, a second electronic signature verification unit that performs verification of the second electronic signature value, and when the verification of the second electronic signature value is completed, the plurality of members are pre-built to be accessible A notification message posting unit that posts a notification message indicating that the first storage path information will be modified on a web page for disclosure, and a preset notification period elapses after the notification message is posted on the web page for disclosure. until the first storage path information is modified, when objection messages indicating opposition to the modification of the first storage path information are not received from all of the electronic terminals of each of the plurality of members, the modification of the first storage path information is approved. After processing, an approval completion message transmission unit for transmitting an approval completion message indicating that modification of the first storage path information has been approved, to the first electronic terminal.

In addition, the operating method of the operating server of the NFT transaction service enabling modification of the content storage path information included in the NFT according to an embodiment of the present invention is the 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 forming a key pair with a public key for each of the plurality of members is pre-stored in an electronic terminal owned by each of the plurality of members Yes - Maintaining a public key storage unit in which is stored, a plurality of NFTs corresponding to each of a plurality of contents - Storage for cloud storage in which contents corresponding to each NFT are stored in each of the plurality of NFTs Path information is included - information about, information on the owner of each of the plurality of NFTs - the owner of each of the plurality of NFTs is any one of the plurality of members - and each of the plurality of contents Maintaining an NFT information storage unit in which information on a producer of the plurality of contents, each of which 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, by an electronic terminal, an electronic signature based on the first storage path information; in the first electronic terminal, a first individual whose data for the first storage path information is stored in the first electronic terminal; When the first electronic signature value is received from the first electronic terminal as the first electronic signature value is generated by digital signature with the key, 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, the NFT With reference to the information storage unit, after confirming a second member who is a creator of the first content among the plurality of members, a second electronic terminal of the second member is authorized to modify the first storage path information. requesting an electronic signature based on the first storage path information while transmitting an inquiry message inquiring whether the first storage path information is valid, instructing the second electronic terminal to approve the modification process for the first storage path information At the same time as the approval message is received, in the second electronic terminal, the data for the first storage path information is digitally signed with the second private key stored in the second electronic terminal to generate a second electronic signature value. , When the second electronic signature value is received from the second electronic terminal, after extracting the second public key for the second member from the public key storage unit, based on the second public key, the second Performing verification of the electronic signature value, when the verification of the second electronic signature value is completed, the first storage path information is displayed on a web page for public disclosure that is pre-built so that the plurality of members can access it. Posting a notice message indicating that it will be modified, and after the notice message is posted on the notice web page, until a preset notice period elapses, from all electronic terminals of each of the plurality of members, When the objection message indicating opposition to the modification of the first storage path information is not received, after approval of the modification of the first storage path information, to the first electronic terminal, the first storage path information and transmitting an approval completion message indicating that modification of .

Among a plurality of members subscribed to a Non-Fungible Token (NFT) transaction service, the present invention is included in the first NFT from a first electronic terminal of a first member who is an owner of a first NFT corresponding to a first content. When an approval request command for requesting approval for modifying the first storage path information is received, a second member who is a producer of the first content approves the modification process for the first storage path information; Operation server of NFT transaction service that approves the 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 operation thereof By presenting a method, it is possible to support the owner of the NFT to modify the storage path information included in the NFT.

1 is a diagram showing the structure of an operating server of an NFT transaction service that enables modification of content storage path information included in a non-fungible token (NFT) according to an embodiment of the present invention.
2 is a flowchart illustrating an operating method of 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.

Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings. This description is not intended to limit the present invention to specific embodiments, but should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. While describing each drawing, similar reference numerals have been used for similar components, and unless otherwise defined, all terms used in this specification, including technical or scientific terms, are common knowledge in the art to which the present invention belongs. has the same meaning as commonly understood by the person who has it.

In this document, when a certain component is said to "include", it means that it may further include other components without excluding other components unless otherwise stated. In addition, in various embodiments of the present invention, each component, functional block, or means may be composed of one or more sub-components, and the electrical, electronic, and mechanical functions performed by each component are electronic It may be implemented with various known elements or mechanical elements such as circuits, integrated circuits, ASICs (Application Specific Integrated Circuits), and may be implemented separately or two or more may be integrated into one.

On the other hand, the blocks of the accompanying block diagram or the steps of the flowchart are computer program instructions that perform designated functions by being loaded into a processor or memory of a device capable of data processing, such as a general-purpose computer, a special purpose computer, a portable notebook computer, and a network computer. can be interpreted as meaning Since these computer program instructions may be stored in a memory included in a computer device or in a computer readable memory, the functions described in blocks of a block diagram or steps of a flowchart are produced as a product containing instruction means for performing them. It could be. Further, 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). Also, it should be noted that in some alternative embodiments, functions mentioned in blocks or steps may be executed out of a predetermined 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.

1 is a diagram showing the structure of an operating server of an NFT transaction service that enables modification of content storage path information included in a non-fungible token (NFT) according to an embodiment of the present invention.

Referring to FIG. 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 notification message posting unit 117.

The public key storage unit 111 includes member information of 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 public key for each of the plurality of members 131, 132, and 133 and the private key forming the key pair are electronic terminals 141, 142, and 143 owned by each of the plurality of members 131, 132, and 133. ) is pre-stored.

In relation to this, in the public key storage unit 111, as shown in Table 1 below, member information of each of the plurality of members 131, 132, and 133 subscribed to the NFT transaction service, and the plurality of members 131, 132, 133) pre-issued public keys 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 producer of each of the plurality of contents. has been

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

For example, in the NFT information storage unit 112, 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 on each producer may be stored.

multiple contents Multiple NFTs Multiple NFTs
each owner multiple contents
each producer content 1 NFT 1 member 1 member 2 content 2 NFTs 2 member 2 member 3 content 3 NFTs 3 member 4 member 1 ... .... ... ...

The first electronic signature requesting unit 113 sends 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' who is the owner of 'NFT 1' corresponding to 'content 1', the first storage path included in 'NFT 1' Assume that an approval request command requesting approval for modifying information 'storage path information 1' is received.

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

At this time, in the first electronic terminal, 'Public Key 1', which is a public key for 'Member 1', and 'Private Key 1' forming a key pair may be stored, and the NFT transaction service operation server 110 may store the When a request for an electronic signature based on 'storage path information 1' is received, the first electronic terminal digitally 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 operating server 110 of the NFT transaction service.

In this way, in the first electronic terminal, as the data for the first storage path information is digitally signed with the first private key stored in the first electronic terminal to generate a first electronic signature value, NFT transaction service is operated. When the server 110 receives the first electronic signature value from the first electronic terminal, the first electronic signature verification unit 114 first discloses the first member to the first member from the public key storage unit 111. After extracting the key, the first electronic signature value is verified based on the first public key.

At this time, according to an embodiment of the present invention, the first electronic signature verification unit 114 receives the first electronic signature value from the first electronic terminal, 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 the data for the first storage path information matches, the verification of the first electronic signature value may be completed.

For example, as in the above 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' 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 'Electronic Signature Value 1 It can be checked whether the first decryption value generated when ' is decrypted with 'public key 1' matches the data for 'storage path information 1'.

In this regard, according to the above example, 'electronic signature value 1' is an electronic signature value generated by digitally signing data for 'storage path information 1' in the first electronic terminal with 'private key 1', and Since key 1' is a private key forming 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 the 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 a plurality of members After confirming the second member who is the producer of the first content among the 131, 132, and 133, whether or not to approve modification of the first storage path information by the second electronic terminal of the second member is determined. An electronic signature based on the first storage path information is requested while transmitting an inquiry message for querying.

For example, as in the above example, when it is assumed that the verification of 'electronic signature value 1' is completed by the first electronic signature verification unit 114, the second electronic signature request unit 115 performs Referring to the NFT information storage unit 112, after confirming that the second member, who is the producer of 'Content 1', is 'Member 2', the 'Storage Path Information 1' is modified with the second electronic terminal of 'Member 2'. It is possible to request an electronic signature based on 'storage path information 1' while sending an inquiry message inquiring whether to approve it.

In this case, when it is assumed that 'Member 2' inputs an approval command indicating approval of the modification process for 'Storage Path Information 1' to the second electronic terminal in response to the query message, the second electronic terminal may 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 a public key for 'Member 2', and 'Private Key 2' forming a key pair may be stored, and from the operation server 110 of the NFT transaction service ' 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 instructing the operation server 110 of the NFT transaction service to approve the modification process for the first storage path information is received from the second electronic terminal, 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 to generate a second electronic signature value, from the second electronic terminal, the operation server 110 of the NFT transaction service ), 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 Based on , verification of the second electronic signature value is performed.

At this time, according to an embodiment of the present invention, the second electronic signature verification unit 116, when the second electronic signature value is received at the same time as the approval message is received from the second electronic terminal, the public key storage unit After extracting the second public key from (111), 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 Upon confirmation, if it is confirmed that the second decryption value matches the data for the first storage path information, the verification of the second electronic signature value may be completed.

For example, as in the above 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' 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, It can be checked whether the second decryption value generated when ' is decrypted with 'public key 2' matches the data for 'storage path information 1'.

In this regard, according to the above example, 'electronic signature value 2' is an electronic signature value generated by digitally signing the data for 'storage path information 1' in the second electronic terminal with 'private key 2', and Since key 2' is a private key forming 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 the 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 announcement message posting unit 117 pre-registers so that the plurality of members 131, 132, and 133 can access it. A notification message indicating that the first storage path information is to be modified is posted on the constructed web page for disclosure.

The approval completion message transmission unit 118 sends a plurality of members 131 to the operating server 110 of the NFT transaction service after the announcement message is posted on the announcement web page until a preset announcement period elapses. , 132, 133) to modify the first storage path information when an objection message indicating opposition to modification of the first storage path information is not received from each of the electronic terminals 141, 142, and 143 After approval processing is performed, an approval completion message indicating that modification of the first storage path information is approved is transmitted to the first electronic terminal.

Hereinafter, operations of the notification message posting unit 117 and the approval complete message transmission unit 118 will be described in detail, for example.

First, as in the above example, when it is determined that the verification of the 'electronic signature value 2' is completed by the second electronic signature verification unit 116, the announcement message posting unit 117 sends a plurality of members 131, 132 and 133) may post a notification message indicating that 'storage path information 1' will be modified on a web page for public disclosure that is pre-built to be accessible.

At this time, the preset public notice period is set to '2 weeks', and until '2 weeks' has elapsed since the announcement message was posted on the web page for publication by the notice message posting unit 117, the NFT transaction service The operation server 110 does not receive an objection message indicating that the modification of 'storage path information 1' is opposed from all of the electronic terminals 141, 142, and 143 of each of the plurality of members 131, 132, and 133. If it is not, the approval completion message transmission unit 118 approves the modification of 'storage path information 1', and then instructs 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' is approved, and then modify 'Storage Path Information 1'.

That is, the operating 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 for requesting approval for modification is received, the second member, who is a creator of the first content, approves the modification process for the first storage path information, and the plurality of members 131, 132, 133) Only when neither of the members oppose 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 generator 119 and a first registration request unit 120.

When the approval completion message is transmitted to the first electronic terminal by the approval completion message transmission unit 118, the first transaction generating unit 119 uses a pre-issued operator private key for the first storage path information. Approval 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 after digitally signing data to generate an operator electronic signature value is approved. Creates a first transaction that includes.

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

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

First, as in the above example, when it is determined that the transmission of an approval completion message indicating that modification of 'storage path information 1' has been approved to the first electronic terminal by the approval completion message transmission unit 118 has been completed, 1 The transaction generating unit 119 electronically signs the data for 'storage path information 1' with the operator's private key issued in advance to generate 'operator electronic signature value', then 'electronic signature value 1', 'electronic signature 'Transaction 1' including approval information indicating that modification of value 2', 'operator digital signature value', and 'storage path information 1' is approved may be generated.

Then, the first registration request unit 120 randomly selects any 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, while the blockchain network 100 of 'transaction 1' ) can send a registration request to.

Accordingly, when the first node device receives the first transaction and the registration request from the operation server 110 of the NFT transaction service, the first node device blocks the block stored on the memory of the first node device. The first block containing the first transaction is created based on the previous block linked to the chain data by the chain, and the storage of the first block is completed by connecting the first block to the blockchain data by the chain. Then, the first block is propagated to the remaining node devices excluding 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 example, while the first node device is referred to as the node device 101 and the first registration request unit 120 transmits 'Transaction 1' to the node device 101, 'Transaction 1' As the registration request to the blockchain network 100 is transmitted, if the node device 101 receives the 'transaction 1' and the registration request of the 'transaction 1' to the blockchain network 100, 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 By connecting to, after completing the storage of the first block, the first block is transferred to a node device among a plurality of node devices 101, 102, 103, 104, 105, and 106 through the blockchain network 100. It can propagate to the remaining node devices (102, 103, 104, 105, 106) except for (101).

Specifically, when the node device 101 receives a registration request to the blockchain network 100 of 'transaction 1' and 'transaction 1' from the operation server 110 of the NFT transaction service, the chain connects to the blockchain data. The first block, which is a new block including the transaction, may be generated by referring to a block header of a previous block. Then, the node device 101 connects the first block to the blockchain data in a chain, thereby completing the storage of the first block and then transferring the first block to the remaining nodes through the blockchain network 100. It can propagate to devices 102, 103, 104, 105, 106.

In this way, when the transmission of the approval completion message to the first electronic terminal is completed, 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 is possible to support participants participating in the transaction to confirm that modification of the first storage path information has been approved through the blockchain network 100 .

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

After the approval completion message is transmitted to the first electronic terminal by the approval completion message transmission unit 118, the second transaction generating unit 121 transmits the first storage path information to the second electronic terminal by the first member. As the storage path information is modified, when modification 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 modification information is generated. do.

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

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

First, as in the above example, it is assumed that the approval completion message indicating that modification of 'storage path information 1' has been approved is transmitted to the first electronic terminal by the approval completion message transmission unit 118, and then , Assume that 'storage path information 1' is modified to 'storage path information 2' by 'member 1'.

At this time, the first electronic terminal may generate modification 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 any one of the plurality of node devices 101 , 102 , 103 , 104 , 105 , and 106 , the second node device.

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, while the blockchain network 100 of 'transaction 2' ) can send a registration request to.

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

For example, as in the above example, while the second node device is referred to as the node device 102 and the second registration request unit 122 transmits 'transaction 2' to the node device 102, 'transaction 2' As the registration request to the blockchain network 100 is transmitted, if the node device 102 receives the 'transaction 2' and the registration request of the 'transaction 2' to the blockchain network 100, the node device 102 generates a second block containing 'transaction 2' based on the previous block chained to the blockchain data stored on the memory of the node device 102, and chains the second block to the blockchain data By connecting to, after completing the storage of the second block, the node device of the plurality of node devices (101, 102, 103, 104, 105, 106) the second block through the blockchain network 100 It can propagate to the remaining node devices (101, 103, 104, 105, 106) except for (102).

In this way, the operating 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, the modified information is transferred 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 having a size of n x n (where n is a natural number greater than or equal to 2) that is previously shared with electronic terminals of each of the plurality of members.

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

'라고 하는 경우, 인증용 행렬 저장부(123)에는 '

'이 저장되어 있을 수 있다.For example, let n be '3', and a plurality of members (131, 132, 133) each of the electronic terminals (141, 142, 143) pre-shared with the '3 x 3' size authentication matrix '

', in the authentication matrix storage unit 123, '

' may be stored.

After the announcement message is posted on the web page for announcement by the announcement message posting unit 117 and before the announcement period elapses, the random generator 124 generates a plurality of members 131 , 132 , 133 . ) is received from the third electronic terminal of a third member who is any one of them, an objection message indicating opposition to the modification of the first storage path information is received, 1 random data and n ² -1 dummy data generate them randomly.

When the 1 random data and n ² -1 pieces of dummy data are randomly generated by the random generator 124, the encryption matrix generator 125 determines, in the authentication matrix, n ² constituting the authentication matrix. By replacing components designated with '1' among the components with the one random data, and replacing n ² -1 components designated with '0' with the n ² -1 pieces of dummy data one by one, Generates an nxn encryption matrix.

When the encryption matrix is generated by the encryption matrix generator 125, the third electronic signature requesting unit 126 generates an electronic signature based on the random data while transmitting the encryption matrix to the third electronic terminal. request.

The verification unit 127 calculates a Hadamard product between the encryption matrix and the authentication matrix in the third electronic terminal to generate an nxn-sized operation matrix, and generates n ² numbers constituting the operation matrix. After a first component other than '0' among the components is extracted, the first component is electronically signed with a third private key stored in the third electronic terminal to generate a third electronic signature value, and the third electronic signature value is generated. 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 decoded value generated when the random data is identical to the random data.

Here, the Hadamard product means an operation of multiplying each component in a matrix of the same size, and when there are matrices of '[a b c]' and '[x y z]', if the Hadamard product of two matrices is calculated, the operation matrix for this can be expressed as '[ax by cz]'.

When it is confirmed by the confirmation unit 127 that the third decoded value matches the random data, 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, to the electronic terminal, a disapproval completion message indicating that modification of the first storage path information is disapproved is transmitted.

Hereinafter, operations of the random generator 124, the encryption matrix generator 125, the third digital signature requester 126, the confirmation unit 127, and the disapproval completion message transmission unit 128 are described in detail. Let's explain.

First, as in the above example, when n is set to '3', the notice period is set to '2 weeks', and the notice message is posted on the notice webpage by the notice message posting unit 117, Suppose that, before 'two weeks' elapses, an objection message indicating opposition to modification of 'storage path information 1' is received from a third electronic terminal of 'member 3'.

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

'에서, 상기 인증용 행렬을 구성하는 '9'개의 성분들 중 '1'이 지정되어 있는 성분을 'R'로 치환하고, '0'이 지정되어 있는 '8'개의 성분들을, '8'개의 더미 데이터들인 'D1, D2, D3, D4, D5, D6, D7, D8'로 하나씩 치환함으로써, '3 x 3' 크기의 암호화 행렬을 생성할 수 있다. Then, the encryption matrix generating unit 125 ', the authentication matrix '

', among the '9' components constituting the authentication matrix, the component to which '1' is designated is substituted with 'R', and the '8' components to which '0' is designated are replaced with '8' An encryption matrix having a size of '3 x 3' may be generated by substituting 'D1, D2, D3, D4, D5, D6, D7, and D8', which are three dummy data, one by one.

At this time, when the encryption matrix generator 125 replaces '8' elements designated with '0' among the '9' elements constituting the authentication matrix with '8' dummy data one by one. , It can be substituted one by one in the direction from the left column to the right column, and from the top row to the bottom row. That is, in the authentication matrix, the encryption matrix generator 125 selects '1 row and 1 column, 1 row and 2 columns, 1 row and 3 columns, 2 rows and 1 column, 2 rows and 2 columns, 2 rows and 3 columns, 3 rows and 1 column, .

'의 '1행 1열'의 성분은 '0'이므로, 암호화 행렬 생성부(125)는 상기 인증용 행렬의 '1행 1열'의 성분을, '8'개의 더미 데이터들 중 하나인 'D1'로 치환할 수 있다. 또한, 상기 인증용 행렬의 '1행 2열'의 성분은 '1'이므로, 암호화 행렬 생성부(125)는 상기 인증용 행렬의 '1행 2열'의 성분을, 상기 랜덤 데이터인 'R'로 치환할 수 있다.In relation to this, the authentication matrix '

Since the element of '1 row and 1 column' of ' is '0', the encryption matrix generator 125 converts the element of '1 row and 1 column' of the authentication matrix to '0', which is one of '8' pieces of dummy data. It can be substituted with D1'. In addition, since the component of '1st row and 2nd column' of the authentication matrix is '1', the encryption matrix generator 125 converts the element of '1st row and 2nd column' of the authentication matrix to 'R', which is the random data. ' can be substituted.

'에서, 상기 인증용 행렬을 구성하는 '9'개의 성분들 중 '1'이 지정되어 있는 성분을 'R'로 치환하고, '0'이 지정되어 있는 '8'개의 성분들을, '8'개의 더미 데이터들인 'D1, D2, D3, D4, D5, D6, D7, D8'로 하나씩 치환함으로써, '3 x 3' 크기의 암호화 행렬을 '

'과 같이 생성할 수 있다. In this way, the encryption matrix generating unit 125 generates the authentication matrix '

', among the '9' components constituting the authentication matrix, the component to which '1' is designated is substituted with 'R', and the '8' components to which '0' is designated are replaced with '8' By substituting 'D1, D2, D3, D4, D5, D6, D7, D8', which are 'D1, D2, D3, D4, D8', the '3 x 3' size encryption matrix

' can be created.

'을 전송하면서, 상기 랜덤 데이터인 'R'을 기초로 한 전자 서명을 요청할 수 있다.Then, the third electronic signature request unit 126 sends the encryption matrix ' to the third electronic terminal.

', an electronic signature based on the random data 'R' may be requested.

'과, '회원 3'에 대한 공개키인 '공개키 3'과 키쌍을 이루는 '개인키 3'이 저장되어 있을 수 있고, NFT 거래 서비스의 운영 서버(110)로부터, 상기 암호화 행렬인 '

'과, 상기 랜덤 데이터인 'R'을 기초로 한 전자 서명 요청이 수신되면, '

'과 '

' 간의 아다마르 곱을 연산하여, '3 x 3' 크기의 연산 행렬을 '

'과 같이 생성할 수 있다.At this time, on the memory of the third electronic terminal, the authentication matrix '

' and 'Private Key 3' forming a key pair with 'Public Key 3', which is the public key for 'Member 3', 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 '3 x 3' size operation matrix '

' can be created.

'을 구성하는 '9'개의 성분들 중 '0'이 아닌 성분은 'R'이므로, 상기 제3 전자 단말은 상기 연산 행렬로부터, 'R'을 제1 성분으로 추출할 수 있다. 그러고 나서, 상기 제3 전자 단말은 'R'을 '개인키 3'으로 전자 서명하여 '전자 서명 값 3'을 생성한 후, '전자 서명 값 3'을 NFT 거래 서비스의 운영 서버(110)로 전송할 수 있다.At this time, the operation matrix '

Since an element other than '0' among the '9' components constituting ' is 'R', the third electronic terminal may extract 'R' as the first component from the operation matrix. Then, the third electronic terminal digitally signs 'R' with 'private key 3' to generate 'electronic signature value 3', and transfers the 'electronic signature value 3' to the operation server 110 of the NFT transaction service. can transmit

Accordingly, when 'electronic signature value 3' is received in the operation server 110 of the NFT transaction service, the confirmation unit 127 determines the 'member 3' from the public key storage unit 111 as shown in Table 1 above. After extracting 'Public Key 3', it can be checked 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 digitally 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 forming a key pair with ', the verification unit 127 can confirm that the third decryption value matches 'R', which is the random data.

Then, the disapproval completion message transmission unit 128 disapproves the modification of 'storage path information 1' and then completes the disapproval indicating that the modification of 'storage path information 1' is disapproved to the first electronic terminal. message can be sent.

That is, the operating server 110 of the NFT transaction service according to the present invention, when one of the plurality of members 131, 132, and 133 opposes modification of the first storage path information, the first Disapproval may be processed for modification of the first storage path information so that the member cannot modify the first storage path information.

2 is a flowchart illustrating an operating method of 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.

In step S210, member information of 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) A public key storage unit in which a private key is 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 the plurality of contents (each of the plurality of NFTs includes storage path information for the cloud storage in which the contents corresponding to each NFT are stored) information, information on the owner of each of the plurality of NFTs (the owner of each of the plurality of NFTs is any one of the plurality of members) and the producer of each of the plurality of contents (each of the plurality of contents The producer of maintains an NFT information storage unit in which information about one of the plurality of members) is stored.

In step S230, a first storage path information included in the first NFT is modified from a first electronic terminal of a first member who is an owner of a first NFT corresponding to a first content among the plurality of members. When an approval request command for requesting approval for the information 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, as the data for the first storage path information is digitally signed with the first private key stored in the first electronic terminal to generate a first electronic signature value, the first electronic signature value is generated. 1 When the first electronic signature value is received from the electronic terminal, after extracting the first public key for the first member from the public key storage unit, based on the first public key, the first electronic signature value perform verification on

In step S250, when the verification of the first electronic signature value is completed, a second member who is a producer of the first content is identified among the plurality of members with reference to the NFT information storage unit, and then the second member An electronic signature based on the first storage path information is requested while transmitting an inquiry message inquiring whether or not to approve modification of the first storage path information to the second electronic terminal of .

In step S260, an approval message indicating approval of the modification process for the first storage path information is received from the second electronic terminal, and at the same time, the second electronic terminal for the first storage path information As data is digitally signed with the second private key stored in the second electronic terminal to generate a second electronic signature value, when the second electronic signature value is received from the second electronic terminal, 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 the verification of the second electronic signature value is completed, a public announcement indicating that the first storage path information will be modified on a web page for public announcement that is pre-built so that the plurality of members can access it. post a message

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

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, after extracting the first public key from the public key storage unit, the first It is checked whether the first decryption value generated when the first electronic signature value is decrypted with the public key matches the data for the first storage path information, so that the first decryption value corresponds to the first storage path information. If it is confirmed that the data for the first electronic signature matches, the verification of the first electronic signature value may be completed, and in step S260, the second electronic signature is received at the same time as the approval message is received from the second electronic terminal. When a value is received, a second decryption value generated when the second electronic signature value is decrypted with the second public key after extracting the second public key from the public key storage unit is included in the first storage path information. It is checked whether the second decryption value matches the data for the first storage path, and if it is confirmed that the second decryption value matches the data for the first storage path information, the verification of the second electronic signature value may be completed.

In addition, according to one embodiment of the present invention, the operation method of the operation server of the NFT transaction service is performed by using a pre-issued private key for an operator when the transmission of the approval completion message to the first electronic terminal is completed, and the first storage path 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 digitally signing data about information to generate an operator electronic signature value; Generating a first transaction including approval information to, and when the first transaction is generated, randomly selecting a first node device that is any one of a plurality of node devices constituting a blockchain network, It may further include transmitting a registration request to the blockchain network of the first transaction while transmitting the first transaction to a one-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 including the first transaction is generated based on a previous block chained to blockchain data stored on the memory of the first node device. And, by connecting the first block to the blockchain data in a chain, after completing the storage of the first block, the first block is transferred to the first one of the plurality of node devices through the blockchain network. It can propagate to the rest of the node devices except for the node device.

At this time, according to an embodiment of the present invention, in the operating method of the operation server of the NFT transaction service, after the approval completion message is 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 is received. Generating a transaction and when the second transaction is generated, randomly selecting a second node device that is any one of the plurality of node devices and transmitting the second transaction to the second node device, 2 It may further include sending a registration request to the blockchain network of the transaction, at this time, when the second node device receives the second transaction and the registration request from the operation server of the NFT transaction service, A second block including the second transaction is generated based on a previous block chained to the block chain data stored on the memory of the second node device, and the second block is chained to the block chain data. By connecting, after completing the storage of the second block, the second block can be propagated to the remaining node devices other than 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 operating method of the operation server of the NFT transaction service is an nxn (n is a natural number equal to or greater than 2) size matrix for authentication previously shared with the electronic terminal of each of the plurality of members. (The authentication matrix is a matrix composed of '1' and '0' components, pre-stored in the electronic terminal of each of the plurality of members, and 1 of n ² components constituting the authentication matrix maintaining an authentication matrix storage unit in which n elements are designated as '1' and the remaining n ² -1 elements are designated as '0', the announcement message on the web page for announcement After is posted, and before the announcement period elapses, an objection message indicating objection to modification of the first storage path information is received from a third electronic terminal of a third member who is one of the plurality of members. , randomly generating 1 random data and n ² -1 dummy data, and if 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 , a component designated with '1' is replaced with the one random data, and n 2 -1 elements designated with '0' are replaced with the n ^{2 -1} pieces of dummy data. Generating an nxn-sized encryption matrix by substituting one by one with, When the encryption matrix is generated, a third request for an electronic signature based on the random data while transmitting the encryption matrix to the third electronic terminal. In the electronic signature requesting unit and the third electronic terminal, a Hadamard product between the encryption matrix and the authentication matrix is calculated to generate an nxn-sized operation matrix, and '0' among n ² components constituting the operation matrix After a first component other than the first component is extracted, the first component is digitally signed with a third private key stored in the third electronic terminal to generate a third electronic signature value, and the third electronic terminal receives the third electronic signature value. digital signature value If received, a third decryption value generated when a third public key for the third member is extracted from the public key storage unit and then the third electronic signature value is decrypted with the third public key, the random data and, if it is confirmed that the third decryption value matches the random data, after disapproving the modification of the first storage path information, to the first electronic terminal, the first 1 may further include transmitting a disapproval completion message indicating that modification of the storage path information is disapproved.

In the above, with reference to FIG. 2, a method of operating an NFT transaction service operating 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 enabling 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 with reference to FIG. Since it may correspond to a configuration for an operation, a detailed description thereof will be omitted.

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 is implemented as a computer program stored in a storage medium for execution through combination with a computer. can

In addition, 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 implemented in the form of program commands that can be executed through various computer means, so that a computer It can be recorded on a readable medium. The computer readable medium may include program instructions, data files, data structures, etc. alone or in combination. Program instructions recorded on the medium may be those specially designed and configured for the present invention or those known and usable to those skilled in 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 hardware devices specially configured to store and execute program instructions, such as magneto-optical media, and ROM, RAM, flash memory, and the like. Examples of program instructions include high-level language codes that can be executed by a computer using an interpreter, as well as machine language codes such as those produced by a compiler.

As described above, the present invention has been described by specific details such as specific components and limited embodiments and drawings, but these are provided to help a more general understanding of the present invention, and the present invention is not limited to the above embodiments. , Those skilled in the art in the field to which the present invention belongs can make various modifications and variations from these descriptions.

Therefore, the spirit of the present invention should not be limited to the described embodiments, and it will be said that not only the claims to be described later, but also all modifications equivalent or equivalent to these claims belong to the scope of the present invention. .

110: Operating 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: Publication message posting unit 118: Approval completion message transmission unit
119: first transaction generator 120: first registration request unit
121: second transaction generator 122: second registration request unit
123: authentication matrix storage unit 124: random generator
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 terminal owned by each of a plurality of members
100: blockchain network
101, 102, 103, 104, 105, 106: multiple node devices

Claims (12)

In the operating server of the NFT transaction service that enables modification of content storage path information included in NFT (Non-Fungible Token),
Member information of 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 - a private key forming a key pair with a public key for each of the plurality of members, a public key storage unit in which - is pre-stored in an electronic terminal owned by each of the plurality of members;
Information on a plurality of NFTs corresponding to each of the plurality of contents, wherein each of the plurality of NFTs includes storage path information for a cloud storage in which the contents corresponding to each NFT are stored, and the plurality of NFTs Information on the owner of each of the NFTs of -the owner of each of the plurality of NFTs is any one of the plurality of members -and the producer of each of the plurality of contents -the producer of each of the plurality of contents Is any one of the members of - NFT information storage unit for which information is stored;
Among the plurality of members, the first electronic terminal of the first member who is the owner of the first NFT corresponding to the first content will give permission to modify the first storage path information included in the first NFT. a first electronic signature requesting unit for requesting, to the first electronic terminal, an electronic signature based on the first storage path information when an approval request command requesting a request is received;
In the first electronic terminal, as the data for the first storage path information is digitally signed with the first private key stored in the first electronic terminal to generate a first electronic signature value, 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 the first electronic signature value is verified based on the first public key. a first electronic signature verification unit;
When the verification of the first electronic signature value is completed, the second member who is the producer of the first content is identified among the plurality of members with reference to the NFT information storage unit, and then the second electronic terminal of the second member is identified. a second electronic signature requesting unit requesting an electronic signature based on the first storage path information while transmitting an inquiry message inquiring whether to approve modification of the first storage path information;
At the same time as an approval message indicating approval of the modification process for the first storage path information is received from the second electronic terminal, the data for the first storage path information is transmitted from the second electronic terminal to the second electronic terminal. As the second electronic signature value is generated by being digitally signed with the second private key stored in the electronic terminal, when the second electronic signature value is received from the second electronic terminal, from the public key storage unit, the second electronic signature value is generated. a second electronic signature verification unit extracting a second public key for , and then verifying the second electronic signature value based on the second public key;
When the verification of the second electronic signature value is completed, a public announcement message indicating that the first storage path information will be modified is posted on a web page for public announcement that is pre-built so that the plurality of members can access it. message posting department; and
After the announcement message is posted on the announcement webpage, until a preset announcement period elapses, from all of the electronic terminals of each of the plurality of members, an objection to modification of the first storage path information is instructed. is not received, an approval completion message indicating that modification of the first storage path information has been approved is transmitted to the first electronic terminal after processing approval for modifying the first storage path information. Transmitting approval completion message transmission unit
Operation server of NFT transaction service including. According to claim 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 then the first electronic signature value is decrypted with the first public key. It is checked 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 the verification 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 used with the second public key. It is checked whether the second decrypted value generated when the value is decoded matches the data for the first storage path information, and it is determined that the second decrypted value matches the data for the first storage path information. When it is, the operation server of the NFT transaction service, characterized in that for completing the verification process for the second electronic signature value. According to claim 1,
When the approval completion message is transmitted to the first electronic terminal, an operator digital signature value is generated by digitally signing the data for the first storage path information using a pre-issued operator private key, and then the first electronic signature a first transaction generator configured to generate a first transaction including a value, the second electronic signature value, the operator electronic signature value, and approval information indicating that modification of the first storage path information is approved; and
When the first transaction is generated, a first node device that is any one of a plurality of node devices constituting the blockchain network is randomly selected and the first transaction is transmitted to the first node device, while the first node device is selected. A first registration request unit for transmitting a registration request to the blockchain network of 1 transaction
Including more,
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 chained to the blockchain data stored on the memory of the first node device. After completing the storage of the first block by generating a first block and connecting the first block to the blockchain data in a chain, the first block is transferred to the plurality of nodes through the blockchain network. Operation server of the NFT transaction service, characterized in that for propagating to the rest of the node devices except for the first node device among the devices. According to claim 3,
After the approval completion message is transmitted to the first electronic terminal, as the first storage path information is modified to second storage path information by the first member, the first storage path information is transmitted from the first electronic terminal to the first storage path information. a second transaction generator configured to generate a second transaction including the modified information when modification information indicating that path information has been modified to the second storage path information is received; and
When the second transaction is generated, a second node device that is any one of the plurality of node devices is randomly selected and the second transaction is transmitted to the second node device, while the block chain of the second transaction A second registration request unit that transmits a registration request to the network
Including more,
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 chained to the blockchain data stored on the memory of the second node device. After completing the storage of the second block by generating a second block and connecting the second block to the blockchain data in a chain, the second block is transmitted to the plurality of nodes through the blockchain network. Operation server of the NFT transaction service, characterized in that for propagating to the rest of the node devices except for the second node device among the devices. According to claim 1,
An authentication matrix of size nxn (n is a natural number equal to or greater than 2) shared with electronic terminals of each of the plurality of members in advance - the authentication matrix is a matrix composed of '1' and '0' components, It is pre-stored in the electronic terminal of each of a plurality of members, and one of the n ² elements constituting the authentication matrix is designated as '1', and the remaining n ² -1 elements are designated as '0'. Designated as - a matrix storage unit for authentication in which is stored;
After the announcement message is posted on the announcement web page, but before the announcement period elapses, the first storage path information is modified from a third electronic terminal of a third member who is one of the plurality of members. When an opposite message indicating that the opposite is received is received, a random generator randomly generating 1 random data and n ² -1 dummy data;
If the 1 piece of random data and n ² -1 pieces of dummy data are randomly generated, in the authentication matrix, the component to which '1' is designated among the n ² components constituting the authentication matrix is selected as the one an encryption matrix generating unit that generates an nxn-sized encryption matrix by replacing n ² -1 elements designated with '0' with random data and replacing n ² -1 elements with the n 2 -1 dummy data one by one;
a third electronic signature requesting unit requesting an electronic signature based on the random data while transmitting the encryption matrix to the third electronic terminal when the encryption matrix is generated;
In the third electronic terminal, a Hadamard product between the encryption matrix and the authentication matrix is calculated to generate an nxn-sized operation matrix, and '0' of n ² components constituting the operation matrix is '0'. After the first component other than 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 terminal receives the third electronic signature value. When an electronic signature value is received, a third decryption value generated when a third public key for the third member is extracted from the public key storage unit and then the third electronic signature value is decrypted with the third public key , a check unit for checking whether the random data matches; and
If it is determined that the third decryption value matches the random data, after disapproval of the modification of the first storage path information, modification of the first storage path information to the first electronic terminal is disapproved. Disapproval completion message transmission unit for transmitting a disapproval completion message indicating that
Operation server of the NFT transaction service further comprising. In the operating method of the operating server of the NFT transaction service that enables modification of content storage path information included in NFT (Non-Fungible Token),
Member information of 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 - a private key forming a key pair with a public key for each of the plurality of members, pre-stored in an electronic terminal owned by each of the plurality of members - maintaining a public key storage unit in which is stored;
Information on a plurality of NFTs corresponding to each of the plurality of contents, wherein each of the plurality of NFTs includes storage path information for a cloud storage in which the contents corresponding to each NFT are stored, and the plurality of NFTs Information on the owner of each of the NFTs of -the owner of each of the plurality of NFTs is any one of the plurality of members -and the producer of each of the plurality of contents -the producer of each of the plurality of contents Is any one of the members of - Maintaining an NFT information storage unit in which information about is stored;
Among the plurality of members, the first electronic terminal of the first member who is the owner of the first NFT corresponding to the first content will give permission to modify the first storage path information included in the first NFT. requesting, to the first electronic terminal, an electronic signature based on the first storage path information, when an approval request command requesting a request is received;
In the first electronic terminal, as the data for the first storage path information is digitally signed with the first private key stored in the first electronic terminal to generate a first electronic signature value, 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 the first electronic signature value is verified based on the first public key. doing;
When the verification of the first electronic signature value is completed, the second member who is the producer of the first content is identified among the plurality of members with reference to the NFT information storage unit, and then the second electronic terminal of the second member is identified. requesting an electronic signature based on the first storage path information while transmitting an inquiry message inquiring whether to approve modification of the first storage path information;
At the same time as an approval message indicating approval of the modification process for the first storage path information is received from the second electronic terminal, the data for the first storage path information is transmitted from the second electronic terminal to the second electronic terminal. As the second electronic signature value is generated by being digitally signed with the second private key stored in the electronic terminal, when the second electronic signature value is received from the second electronic terminal, from the public key storage unit, the second electronic signature value is generated. After extracting a second public key for , performing verification on the second electronic signature value based on the second public key;
When the verification of the second electronic signature value is completed, posting a public announcement message indicating that the first storage path information will be modified on a web page for public announcement that is pre-built so that the plurality of members can access it. ; and
After the announcement message is posted on the announcement webpage, until a preset announcement period elapses, from all of the electronic terminals of each of the plurality of members, an objection to modification of the first storage path information is instructed. is not received, an approval completion message indicating that modification of the first storage path information has been approved is transmitted to the first electronic terminal after processing approval for modifying the first storage path information. steps to transmit
Operation method of the operating server of the NFT transaction service including. According to claim 6,
The step of verifying the first electronic signature value
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 then the first electronic signature value is decrypted with the first public key. It is checked 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 the verification process,
The step of verifying the second electronic signature value
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 used with the second public key. It is checked whether the second decrypted value generated when the value is decoded matches the data for the first storage path information, and it is determined that the second decrypted value matches the data for the first storage path information. When it is, the operation method of the operating server of the NFT transaction service, characterized in that for completing the verification of the second electronic signature value. According to claim 6,
When the approval completion message is transmitted to the first electronic terminal, an operator digital signature value is generated by digitally signing the data for the first storage path information using a pre-issued operator private key, and then the first electronic signature generating a first transaction including a value, the second electronic signature value, the operator electronic signature value, and approval information indicating that modification of the first storage path information is approved; and
When the first transaction is generated, a first node device that is any one of a plurality of node devices constituting the blockchain network is randomly selected and the first transaction is transmitted to the first node device, while the first node device is selected. 1 Sending a request for registration of the transaction to the blockchain network
Including more,
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 chained to the blockchain data stored on the memory of the first node device. After completing the storage of the first block by generating a first block and connecting the first block to the blockchain data in a chain, the first block is transferred to the plurality of nodes through the blockchain network. Method of operating a server operating an NFT transaction service, characterized in that for propagating to the rest of the node devices except for the first node device among the devices. According to claim 8,
After the approval completion message is transmitted to the first electronic terminal, as the first storage path information is modified to second storage path information by the first member, the first storage path information is transmitted from the first electronic terminal to the first storage path information. generating a second transaction including the modified information when modification information indicating that path information has been modified to the second storage path information is received; and
When the second transaction is generated, a second node device that is any one of the plurality of node devices is randomly selected and the second transaction is transmitted to the second node device, while the block chain of the second transaction Sending a registration request to the network
Including more,
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 chained to the blockchain data stored on the memory of the second node device. After completing the storage of the second block by generating a second block and connecting the second block to the blockchain data in a chain, the second block is transmitted to the plurality of nodes through the blockchain network. Method of operating a server operating an NFT transaction service, characterized in that for propagating to the rest of the node devices except for the second node device among the devices. According to claim 6,
An authentication matrix of size nxn (n is a natural number equal to or greater than 2) shared with electronic terminals of each of the plurality of members in advance - the authentication matrix is a matrix composed of '1' and '0' components, It is pre-stored in the electronic terminal of each of a plurality of members, and one of the n ² elements constituting the authentication matrix is designated as '1', and the remaining n ² -1 elements are designated as '0'. designated as - maintaining a matrix storage unit for authentication in which this is stored;
After the announcement message is posted on the announcement web page, but before the announcement period elapses, the first storage path information is modified from a third electronic terminal of a third member who is one of the plurality of members. If an opposite message indicating that the opposite is received is received, randomly generating 1 random data and n ² -1 dummy data;
If the 1 piece of random data and n ² -1 pieces of dummy data are randomly generated, in the authentication matrix, the component to which '1' is designated among the n ² components constituting the authentication matrix is selected as the one generating an nxn-sized encryption matrix by substituting random data and replacing n ² -1 elements designated with '0' with the n ² -1 dummy data one by one;
a third electronic signature requesting unit requesting an electronic signature based on the random data while transmitting the encryption matrix to the third electronic terminal when the encryption matrix is generated;
In the third electronic terminal, a Hadamard product between the encryption matrix and the authentication matrix is calculated to generate an nxn-sized operation matrix, and '0' among n ² components constituting the operation matrix After a first component other than the first component is extracted, the first component is digitally signed with a third private key stored in the third electronic terminal to generate a third electronic signature value, and the third electronic terminal receives the third electronic signature value. When an electronic signature value is received, a third decryption value generated when a third public key for the third member is extracted from the public key storage unit and then the third electronic signature value is decrypted with the third public key , checking whether the random data matches; and
If it is confirmed that the third decryption value matches the random data, after disapproval of the modification of the first storage path information, modification of the first storage path information to the first electronic terminal is disapproved. Sending a disapproval completion message indicating that
Method of operating the operating server of the NFT trading service further comprising a. A computer-readable recording medium recording a computer program for executing the method of any one of claims 6 to 10 through a 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 a combination with a computer.

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