KR102293423B1 - Digital Content Distribution and Used Trading System - Google Patents

Abstract

The present invention relates to a digital content distribution and used transaction system, and more particularly, digital content registered by a digital content provider and a smart contract derived based on information related to digital content are included in the block chain, the smart contract It relates to a digital content distribution and used transaction system that performs distribution and second-hand transactions of the corresponding digital content in accordance with the

Description

Digital Content Distribution and Used Trading System {Digital Content Distribution and Used Trading System}

The present invention relates to a digital content distribution and used transaction system, and more particularly, digital content registered by a digital content provider and a smart contract derived based on information related to digital content are included in the block chain, the smart contract It relates to a digital content distribution and used transaction system that performs distribution and second-hand transactions of the corresponding digital content in accordance with the

Recently, as the performance of personal terminals such as smartphones and tablet PCs and wireless communication technologies such as 5G mobile communication technology have improved, the consumption of digital contents such as movies, music, e-books, and games is increasing. The method of consuming digital content can be largely divided into using a digital content streaming platform or directly purchasing digital content and downloading it to a user's storage medium.

Through a digital content streaming platform, consumers can pay a predetermined fee to the corresponding platform and consume digital content provided by the corresponding platform in a streaming manner. Meanwhile, a consumer can purchase digital content by paying a predetermined cost through a web page that sells digital content, such as a portal site, and download the purchased digital content to the consumer's terminal to consume the digital content.

However, in the case of the digital content streaming platform method, the concept of the consumer owning specific digital content is not included. Consumers are forced to consume, and digital content to which DRM Free is applied is easy to copy and transmit to others, so it is virtually impossible to trade used digital content purchased by consumers.

As the digital content supplier, such as the copyright holders, distributors, and distributors of digital content, can only generate revenue by selling new digital content. We have a revenue model that does this. On the other hand, in the case of a consumer who purchases digital content, unnecessary digital content is generated because the first purchased digital content is not used again.

Therefore, as described above, in terms of supplying digital content, a method that can continuously generate revenue for the corresponding digital content is needed, and in terms of consumers who consume digital content, it is possible to purchase digital content more rationally. There is a need for a method.

According to the present invention, digital content registered by a digital content provider and a smart contract derived based on information related to digital content are included in the block chain, and distribution of the corresponding digital content and second-hand transaction are performed according to the smart contract. Digital content It aims to provide a distribution and used trading system.

In order to solve the above problems, the present invention is a digital content distribution and used transaction system including a block chain network and a service server. Digital content registration step of registering in the DB; In the blockchain network, the first to record digital content registration information including information on the digital content, information on the provider of the digital content, and transaction-related information of the digital content in the distributed ledger of the blockchain network distributed ledger recording stage; In the block chain network, based on the new purchase request information received from the terminal of the first user who wants to purchase the digital content, a point set in advance from the electronic wallet of the first user to the electronic wallet of the digital content provider. a second distributed ledger recording step of recording a transfer record in the distributed ledger and adding the information of the first user to the digital content registration information of the distributed ledger; a new digital content providing step of providing, in the service server, the digital content to the first user's terminal in response to a provision request of the first user's terminal; a third distributed ledger recording step of recording, in the block chain network, that a used transaction is possible in the digital content registration information according to a used conversion request of the first user's terminal; In the block chain network, based on the second-hand purchase request information received from the terminal of the second user who wants to purchase the digital content second-hand, a record of adding the second user's information to the digital content registration information of the distributed ledger is recorded. and a fourth distributed ledger recording step of recording, in the distributed ledger, a transfer record of a preset point from the second user's electronic wallet to the first user's electronic wallet and the digital content provider's electronic wallet; and a second-hand digital content providing step of providing, in the service server, the digital content to the second user's terminal according to a request from the second user's terminal. .

In an embodiment of the present invention, in the first distributed ledger recording step, the information on the provider of the digital content included in the digital content registration information recorded in the distributed ledger of the block chain network is the electronic information of the digital content provider. Including address information about the wallet, the transaction-related information of the digital content included in the digital content registration information includes new price information, new price allocation information, second-hand price information, second-hand price allocation information, second-hand price allocation information, and second-hand information. Required period information may be included.

In an embodiment of the present invention, in the first distributed ledger recording step, the transaction-related information of the digital content includes new price information and new price allocation information, and the second distributed ledger recording step includes the first user The first point corresponding to the new price information withdrawn from the electronic wallet of have.

In an embodiment of the present invention, in the first distributed ledger recording step, the transaction-related information of the digital content includes information on a period required for secondaryization, and in the second distributed ledger recording step, the digital content registration information is deactivated. Further adding second-hand status information including a value, wherein the third distributed ledger recording step is performed according to the first user's terminal's second-hand conversion request for digital content that exceeds a period corresponding to the second-hand required period information The used state information may be changed to an activation value.

In an embodiment of the present invention, in the first distributed ledger recording step, the transaction related information of the digital content includes middle price information, middle price allocation information, and middle price allocation information, and the fourth distributed ledger recording step includes: , a third point corresponding to the second-hand price information withdrawn from the second user's electronic wallet and a fourth point derived based on the second-hand price allocation information to the electronic wallet of the first user and the digital With the electronic wallet of the content provider, the transfer record of the third point, the middle price allocation information, and the fifth point derived based on the middle price allocation information may be recorded in the distributed ledger.

According to an embodiment of the present invention, since digital content registration information is recorded in the distributed ledger of the block chain network, it is possible to exhibit the effect of transparently managing purchase details in purchasing the corresponding digital content.

According to one embodiment of the present invention, since preset points are transferred from the electronic wallet of the new purchaser to the electronic wallet of the digital content provider according to the distributed ledger in which the digital content registration information is recorded, a separate point of the purchaser or the digital content provider It is possible to exert the effect of purchasing digital content without performing distribution.

According to an embodiment of the present invention, a verification process is performed based on the value of the signature of the private key received from the terminal of the user who purchased the digital content, and when the verification is completed, the corresponding digital content is provided to the terminal of the user Therefore, it is possible to exert the effect of strengthening security in providing digital content.

According to an embodiment of the present invention, the digital content registration information includes information about the period required for secondaryization, so that the corresponding digital content can be sold second-hand after the period corresponding to the period information required for secondaryization is exceeded. This can have the effect of preventing the sale of second-hand digital contents purchased in the first place.

According to an embodiment of the present invention, when a user newly purchases digital content or purchases second-hand digital content, the information of the corresponding purchaser is recorded in the distributed ledger, so that the digital content can be managed transparently and the recorded user Since the digital content is provided by determining whether the information of the user and the user requesting the provision of the digital content match, it is possible to enhance the security.

According to an embodiment of the present invention, according to the distributed ledger in which digital content registration information is recorded, the electronic wallet of the user who purchases preset points is transferred to the electronic wallet of the digital content provider and the electronic wallet of the user who sells it used. Therefore, it is possible to exert the effect of being able to purchase second-hand digital contents without performing an operation for distributing separate points of the corresponding subjects.

1 schematically shows the configuration of a digital content distribution and used transaction system according to an embodiment of the present invention.
2 schematically illustrates a process in which digital content is registered in a service server and digital content registration information is recorded in a distributed ledger in a blockchain network according to an embodiment of the present invention.
3 schematically shows the configuration of digital content registration information according to an embodiment of the present invention.
4 schematically illustrates a process of newly purchasing digital content according to an embodiment of the present invention.
5 schematically illustrates a process of registering newly purchased digital content as used according to an embodiment of the present invention.
6 schematically illustrates a process of pre-purchasing digital content according to an embodiment of the present invention.
7 schematically illustrates a verification process performed to provide corresponding digital content in response to a user's request for provision according to an embodiment of the present invention.
8 schematically shows a connection structure of blocks stored in a blockchain network according to an embodiment of the present invention.
9 schematically illustrates an internal configuration of a computing device according to an embodiment of the present invention.

Hereinafter, various embodiments and/or aspects are disclosed with reference to the drawings. In the following description, for purposes of explanation, numerous specific details are set forth to provide a thorough understanding of one or more aspects. However, it will also be recognized by one of ordinary skill in the art that such aspect(s) may be practiced without these specific details. The following description and accompanying drawings set forth in detail certain illustrative aspects of one or more aspects. These aspects are illustrative, however, and some of the various methods in principles of various aspects may be employed, and the descriptions set forth are intended to include all such aspects and their equivalents.

Further, various aspects and features will be presented by a system that may include a number of devices, components and/or modules, and the like. It is also noted that various systems may include additional devices, components, and/or modules, etc. and/or may not include all of the devices, components, modules, etc. discussed with respect to the drawings. must be understood and recognized.

As used herein, “embodiment”, “example”, “aspect”, “exemplary”, etc. may not be construed as an advantage or advantage in any aspect or design described above over other aspects or designs. . The terms '~part', 'component', 'module', 'system', 'interface', etc. used below generally mean a computer-related entity, for example, hardware, hardware A combination of and software may mean software.

Also, the terms "comprises" and/or "comprising" mean that the feature and/or element is present, but excludes the presence or addition of one or more other features, elements, and/or groups thereof. should be understood as not

Also, terms including an ordinal number, such as first, second, etc., may be used to describe various elements, but the elements are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, a first component may be referred to as a second component, and similarly, a second component may also be referred to as a first component. and/or includes a combination of a plurality of related listed items or any of a plurality of related listed items.

In addition, in the embodiments of the present invention, unless otherwise defined, all terms used herein, including technical or scientific terms, are generally understood by those of ordinary skill in the art to which the present invention belongs. have the same meaning as Terms such as those defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in an embodiment of the present invention, an ideal or excessively formal meaning is not interpreted as

1 schematically shows the configuration of a digital content distribution and used transaction system according to an embodiment of the present invention.

As shown in FIG. 1 , the digital content distribution and used transaction system includes a service server 100 and a block chain network 200 , and a terminal 300.N of a plurality of digital content providers and a terminal of a plurality of users. By communicating with (400.M), digital content distribution and second-hand transactions can be performed. Each component shown in FIG. 1 is an embodiment, and may further include additional components.

The service server 100 corresponds to a computing device including one or more processors and one or more memories. The service server 100 communicates with the terminals 300.N of the plurality of digital content providers, the terminals 400.M of the plurality of users, and the block chain network 200, and performs communication with each component. based on the received information to perform the steps for distribution of digital content and used transaction.

The service server 100 stores the digital content received from the terminal 300.N of the digital content provider, including the DB, and performs a predetermined process to transmit the digital content to the terminal 400.M of the user who purchased the digital content. to provide. Preferably, the service server 100 may provide the digital content stored in the DB to the user's terminal 400.M in a streaming manner. Meanwhile, the DB is physically included in the service server 100 or disposed outside the service server 100 to store digital content by the request of the service server 100, and the corresponding digital content by the call of the service server 100 content can be provided.

In addition, the service server 100 may generate a smart contract with the blockchain network 200 and request to generate a transaction based on the generated smart contract. More specifically, the service server 100 receives a plurality of information about digital content from the terminal 300.N of the digital content provider, and a plurality of nodes ( 210.K), it transmits request information to create a smart contract for the corresponding digital content to a specific node 210.1. The specific node 210.1 that has received the request information generates a smart contract for the corresponding digital content based on the request information, and based on the generated smart contract, various A transaction can be created. On the other hand, in the embodiment shown in FIG. 1, the service server 100 does not participate as a node 210.K of the blockchain network 200, but in another embodiment, the service server 100 is a blockchain network ( 200) by participating as the node 210.K, directly creating a smart contract for the corresponding digital content, and creating a transaction based on this.

The blockchain network 200 includes a plurality of nodes 210.K that operate based on blockchain technology. The block chain technology uses a storage structure in which blocks are linked in a chain form, and data related to digital content including smart contracts for digital content and transactions generated based on the smart contract constitute a block chain network 200. It is a distributed storage technology that stores in a plurality of nodes (210.K).

The blockchain network 200 may store the smart contract or transaction generated in the specific node 210.K in the form of a block based on a preset consensus algorithm. Data stored in block form may be shared by a plurality of nodes 210.K constituting the block chain network 200 .

According to the implementation type, the blockchain network 200 is a public blockchain network in which arbitrary nodes can perform a consensus operation, or only a preset node or a node determined through a separate approval process to perform a consensus operation. It may include the form of a private blockchain network that can be The consensus algorithm performed in the blockchain network 200 according to an embodiment is a Proof of Work (PoW) algorithm, a Proof of Stake (PoS) algorithm, a Delegated Proof of Stake (DPoS) algorithm, and a Practical Byzantine Fault Tolerance (PBFT) algorithm. Algorithm, Delegated Byzantine Fault Tolerance (DBFT) Algorithm, Redundant Byzantine Fault Tolerance (RBFT) Algorithm, Sieve Algorithm, Tendermint Algorithm, Paxos Algorithm, Raft Algorithm, Proof of Authority (PoA) Algorithm, or Proof of Elapsed Time (PoET) Algorithm. may include

Each node 210.K included in the block chain network 200 may operate by a block chain core package according to a hierarchical structure. The hierarchical structure defines the structure of data handled in the block chain network 200, a data layer that manages data, performs mining to verify the validity of a block, and creates a block. The consensus layer responsible for processing, the smart contract layer that processes and executes smart contracts, the common layer that implements and manages P2P network protocols, hash functions, digital signatures, encoding and common storage, and applications where various applications are created, processed and managed It may contain layers.

Meanwhile, in the smart contract described above, information related to digital content, for example, the new sale price of digital content, the dividend rate for the new sale price, the minimum period during which second-hand sales are possible, etc. is written in a programmable language, and an arbitrary computing device can be executed in That is, when the code or function included in the smart contract is executed, new transactions and used transactions for digital content may be performed as in the embodiments of the present invention.

In addition, the smart contract may be executed by at least one of a method of creating a new smart contract, a method of executing a code or function on a specific smart contract, or a method of transferring points distributed in the blockchain network 200 . In addition, smart contracts can be executed by transactions that occur by externally owned accounts or by other contracts.

The above-mentioned point may mean any type of virtual currency or token that can be operated on the blockchain network 200 . These points may be exchanged for cash according to the market price by the service server 100 or a separate server.

On the other hand, the terminal 300.N of the digital content provider corresponds to a terminal used by all subjects for providing the corresponding digital content to the service server 100, such as a copyright holder, distributor, and distributor of the corresponding digital content. In addition, the terminal 300.N of the digital content provider is a computing device including one or more processors and one or more memories. Specifically, the terminal 300 of the digital content provider is a desktop personal computer (PC), a laptop PC (Laptop). personal computer), workstation personal computer (PC), smart phone, tablet, personal digital assistant (PDA), and the like.

The terminal 300.N of the digital content provider may communicate with the service server 100 through a wired or wireless communication method, and transmit digital content and a plurality of information about the digital content to the service server 100 . can send

The user's terminal (400.M) is a digital content provider's terminal (300.N) through the digital content provider's terminal (300.N) to newly purchase the digital content registered in the service server 100, or all entities that sell and purchase the newly purchased digital content used. It corresponds to the terminal you are using. Similarly, the user's terminal 400.M is a computing device including one or more processors and one or more memories. Specifically, the user's terminal includes a desktop PC (Desktop Personal Computer), a laptop PC (Laptop Personal Computer), and a workstation PC. (Workstation Personal Computer), smart phone (Smartphone), tablet (Tablet), PDA (Personal Digital Assistant) and the like.

On the other hand, it includes a plurality of digital content providers' terminals (300.N) and a plurality of user terminals (400.M) respectively corresponding to the electronic wallets (310.N, 410.M). Each of the electronic wallets (310.N, 410.M) includes the points held by the corresponding digital content provider or user, and the points distributed in the block chain network 200 are the respective electronic wallets (310.N, 410.M). ), the corresponding point is transferred according to the unique address assigned to it, and the transfer record can be included as a transaction in the block. On the other hand, the address of each electronic wallet (310.N, 410.M) may also serve as an identifier that can identify a digital content provider or user in the block chain network 200.

The terminal 400 of the first user and the terminal 500 of the second user, which will be described later, refer to a user who newly purchases digital content registered by a digital content provider as a first user, and the first user in order to facilitate explanation. Although the user who purchases the digital content purchased by the second user is named as the second user, the first user and the second user are not limited to performing only a new purchase or only a second-hand purchase.

2 schematically illustrates a process in which digital content is registered in a service server and digital content registration information is recorded in a distributed ledger in a blockchain network according to an embodiment of the present invention.

2, in the service server 100, digital content registration step (S20) of registering the digital content received from the terminal 300 of the digital content provider in the DB of the service server 100; and digital content registration information including, in the block chain network 200, information 610 on the digital content, information 620 on the provider of the digital content, and transaction-related information 630 of the digital content A first distributed ledger recording step (S40) of recording (600) in the distributed ledger of the blockchain network 200; is performed.

Specifically, the terminal 300 of the digital content provider performs a step (S10) of transmitting the digital content to be provided by the corresponding digital content provider to the service server 100 . In the corresponding step (S10), as well as the digital content file, digital content registration information 600 for the corresponding digital content may be further included and transmitted. The digital content registration information 600 includes information 610 on the corresponding digital content, information 620 on the provider of the digital content, and transaction related information 630 of the digital content, that is, the digital content registration The information 600 may include meta information about the corresponding digital content.

For example, when the movie A is transmitted through the terminal 300 of the digital content provider, image data on which the movie A can be played and meta information about the movie A are transmitted to the service server 100 .

The service server 100 performs a digital content registration step (S20) of registering the digital content received from the terminal 300 of the corresponding digital content provider in the DB. By performing the digital content registration step (S20), the service server 100 stores the digital content in the DB, and later on the basis of the provision request received from the terminal of the user who purchased the digital content to the user's terminal. can provide

On the other hand, the service server 100 transmits the request information for recording the digital content in the distributed ledger to the block chain network 200 based on the digital content received from the terminal 300 of the digital content provider (S30) ) is performed. More specifically, the service server 100 derives the request information including the digital content registration information 600 for the digital content, and the derived request information is a plurality of nodes constituting the block chain network 200 . It is transmitted to a specific node (210.K) among (210.K). Preferably, the request information corresponds to request information for generating a smart contract for the corresponding digital content in the specific node 210.K.

The specific node 210.K of the block chain network 200 that has received the request information from the service server 100 records the digital content registration information 600 for the corresponding digital content in the distributed ledger first distributed ledger record. Step S40 is performed. More specifically, through the first distributed ledger recording step (S40), the specific node 210.K generates a smart contract for the corresponding digital content based on the digital content registration information 600, and the generated smart contract can be recorded in the distributed ledger, that is, the transactions of the blocks that form the blockchain. Information included in the smart contract will be described with reference to FIG. 3 to be described later.

3 schematically shows the configuration of digital content registration information according to an embodiment of the present invention.

3, in the first distributed ledger recording step (S40), the digital content provider included in the digital content registration information 600 recorded in the distributed ledger of the block chain network 200. The information 620 includes address information on the electronic wallet of the corresponding digital content provider, and the transaction related information 630 of the digital content included in the digital content registration information 600 includes new price information 631, It includes new price allocation information 632 , middle price information 633 , middle price allocation information 634 , middle price allocation information 635 , and used period information 636 .

Specifically, the digital content registration information 600 may include meta information for the corresponding digital content as described above with reference to FIG. 2 . More specifically, the digital content registration information 600 includes information 610 on digital content, information 620 on a provider of digital content, and transaction-related information 630 on digital content.

The information 610 on the digital content includes information for categorizing digital content, such as title information of the corresponding digital content, image or thumbnail image information of the corresponding digital content, genre information of the corresponding digital content, and the like, and the digital content itself. includes information about

The information 620 on the provider of the digital content is the terminal 300 of the digital content provider that has transmitted the digital content or unique identification information that can identify the digital content provider and the terminal 300 of the digital content provider. It includes information on the terminal 300 of the digital content provider that has transmitted the corresponding digital content to the service server 100, such as the included address information of the electronic wallet. On the other hand, since the address information of the electronic wallet itself can serve as unique identification information, the unique identification information can be omitted.

Also, the information 620 on the provider of the digital content may include information on a single subject or information on a plurality of subjects. More specifically, when the subject providing the digital content provides the digital content by a plurality of entities, such as the copyright holder who produced the digital content, the distributor who distributes the digital content, and the distributor who distributes the digital content , the information 620 on the provider of the digital content may include information on each subject. Meanwhile, even when the copyright holder, distributor, and distributor of the digital content are each composed of a plurality of subjects, the information 620 about the provider of the digital content may include information about each subject.

Meanwhile, the transaction related information 630 of the digital content includes new price information 631, new price allocation information 632, middle price information 633, middle price allocation information 634, and middle price allocation of the corresponding digital content. It includes information necessary for distributing the corresponding digital content (new transaction) and performing second-hand transactions, such as information 635 and information about the period required for second-hand use 636 .

The new price information 631 corresponds to point information for first registering the corresponding digital content by the provider of the digital content and selling it to the user. The new price allocation information 632 corresponds to information on the dividend rate distributed to the providers of the corresponding digital content at the point corresponding to the new price information 631 . The used price information 633 corresponds to point information for selling the corresponding digital content as used. The middle price allocation information 634 corresponds to information on the dividend rate distributed to the remaining subjects except for users who sell the corresponding digital content at a point corresponding to the middle price information 633 . More specifically, the remaining subjects include a provider of digital content that has provided the corresponding digital content, and an operator who operates a digital content distribution and used transaction system, preferably an operator who operates the service server 100 . The middle price allocation information 635 corresponds to information on the dividend rate allocated to the provider of the corresponding digital content at a point in which the middle price allocation information 634 is considered in the middle price information 633 . Finally, the second-hand required period information 636 corresponds to information on a period during which digital content newly registered in the service server 100 can be sold second-hand. More specifically, in the case where a second-hand transaction is possible immediately after a user purchases the digital content newly provided today, the number of users who want to purchase the digital content newly decreases, resulting in a decrease in the revenue of the provider of the digital content. do. Accordingly, the information on the required period for second-hand purchase 636 corresponds to a period for enabling second-hand transactions after the new transaction of the corresponding digital content is sufficiently made. For example, the information on the period required for secondary resale 636 may include information about a specific period or time, such as one year after initial registration or November 13, 2019.

As described above, it is possible to exhibit the effect of preventing indiscriminate second-hand transactions of newly registered digital content through the information on the period required for second-hand use 636 .

On the other hand, as described above, when the information on the digital content provider includes information on a plurality of subjects, the new price allocation information 632 and the middle price allocation information 635 are distributed to each subject. Contains information about each odds.

In this way, the specific node 210.K of the block chain network 200 that has received the digital content registration information 600 generates a smart contract for the corresponding digital content based on the digital content registration information 600 and , the created smart contract can be recorded on the distributed ledger. Meanwhile, the block chain network 200 may include a separate DB to store the smart contract created in the node 210.K and the latest state of the smart contract.

In addition, although not shown in FIG. 3 , a movement of a point performed based on a smart contract for the corresponding digital content may be recorded in the digital content registration information 600 . For example, the transfer record of a predetermined point from the electronic wallet of the first user who newly purchased the digital content to the electronic wallet of the digital content provider and the second-hand seller in the electronic wallet of the second user who purchased the digital content The transfer of a predetermined point to the electronic wallet of the first user or the electronic wallet of the corresponding digital content provider may be recorded.

4 schematically illustrates a process of newly purchasing digital content according to an embodiment of the present invention.

4, in the block chain network 200, based on the new purchase request information received from the terminal 400 of the first user who wants to purchase the digital content, the first user's electronic A second distributed ledger that records a transfer record of a preset point from a wallet to the electronic wallet of the digital content provider in the distributed ledger, and adds the first user's information to the digital content registration information 600 of the distributed ledger A recording step (S110); is performed.

Specifically, the service server 100 may provide list information on one or more digital contents registered in the DB based on a request from the terminal 400 of the first user who wants to purchase the digital contents. The list information is displayed on the display device of the first user's terminal 400 so that the first user can input new purchase request information for a specific digital content. The first user's terminal 400 transmits new purchase request information for the digital content selected by the first user to the service server 100 (S50). Preferably, the new purchase request information may include address information of the electronic wallet included in the terminal 400 of the first user and unique identification information of the first user.

The service server 100 performs a step (S60) of requesting to perform a new purchase of the corresponding digital content to the block chain network 200 according to the new purchase request information received from the terminal 400 of the first user. do. Meanwhile, in another embodiment of the present invention, after determining whether the points recorded in the electronic wallet included in the terminal 400 of the first user are equal to or more than the points corresponding to the new price information 631 of the digital content, the new price In the case of more than the points corresponding to the information 631 , it is possible to request to perform a new purchase of the corresponding digital content to the block chain network 200 . Meanwhile, the determination of the points recorded in the electronic wallet included in the terminal 400 of the first user described above may be performed through a smart contract for the corresponding digital content in the block chain network 200 .

Meanwhile, the second distributed ledger recording step (S110) is derived based on a first point corresponding to the new price information 631 withdrawn from the first user's electronic wallet and the new price allocation information 632 The transfer record of the second point to the electronic wallet of the digital content provider is recorded in the distributed ledger.

More specifically, when the block chain network 200 receives a request to perform a new purchase of the corresponding digital content from the service server 100, the point for the new purchase of the corresponding digital content according to the smart contract for the corresponding digital content. carry out the transfer First, the first point corresponding to the new price information 631 of the digital content is withdrawn (S70) from the electronic wallet of the first user who wants to newly purchase the digital content, and the total points of the first user's electronic wallet are withdrawn (S70). is subtracted by the first point (S80). Meanwhile, the second point calculated in consideration of the new price allocation information 632 of the corresponding digital content from the first point withdrawn is transferred (S90) to the electronic wallet of the corresponding digital content provider, and the digital content provider's electronic wallet The second point is deposited (S100).

On the other hand, in another embodiment of the present invention, the remaining points obtained by subtracting the second point from the first point may be transferred to the corresponding service server 100 , preferably the electronic wallet of the corresponding service server 100 . .

For example, when the new price information 631 of the digital content 'A' is 1,000 points and the new price allocation information 632 is 80%, the electronic wallet of the first user who wants to purchase the digital content 'A' new Withdraw 1,000 points corresponding to the first point from the The points are deposited in the electronic wallet of the service server 100, and the above-described point transfer process may be performed based on a smart contract for the corresponding digital content.

Meanwhile, the blockchain network 200 performs a second distributed ledger recording step (S110) of adding the transfer records for the first point and the second point to the distributed ledger. More specifically, in the second distributed ledger recording step (S110), a corresponding transfer record is added to the distributed ledger, and the user who has purchased the corresponding digital content is recorded in the digital content registration information (600). It is possible to further add identification information and used state information on whether the corresponding digital content is in a used state. Preferably, the user's unique identification information may correspond to the user's electronic wallet address information. Since the period has not been exceeded, the used state information may include an inactivation value.

In another embodiment of the present invention, when the block chain network 200 includes a smart contract created in the node 210.K and a separate DB for storing the latest state of the smart contract, the DB includes the second distribution It may include records added in the ledger recording step (S110).

5 schematically illustrates a process of registering newly purchased digital content as used according to an embodiment of the present invention.

As shown in FIG. 5 , in the block chain network 200 , in the first user's terminal 400 , according to the used conversion request, the third distribution is recorded in the digital content registration information 600 that the used transaction is possible. performing the ledger recording step (S140);

In the third distributed ledger recording step (S140), the used state according to the second-hand conversion request of the first user's terminal 400 for the digital content exceeding the period corresponding to the second-hand required period information 636 Change the information to the active value.

Specifically, the first user who has purchased the specific digital content transmits the used conversion request information for the digital content to the service server 100 in order to trade the digital content used (S120). Meanwhile, the used conversion request information may include the first user's electronic wallet address or the first user's unique identification information and the signature of the first user's private key.

On the other hand, in another embodiment of the present invention, the first user transmits a separate input to the service server 100 to the terminal 400 of the first user, and the service server 100 is Among one or more digital contents, a list of digital contents available for used transaction may be transmitted to the terminal 400 of the first user. Meanwhile, the corresponding list is displayed on the display of the first user's terminal 400, and the first user can select a specific digital content to be used and perform the above step (S120).

More specifically, in the above embodiment, it is determined whether the digital content available for second-hand transaction has exceeded a period corresponding to the period required for second-hand use 636 of the corresponding digital content, and when the period is exceeded, the second-hand transaction is possible. It can be identified as digital content.

In another embodiment of the present invention, the service server 100 transmits a list of all digital contents purchased by the first user to the terminal 400 of the first user, and digital contents available for second-hand transactions are selected from the list. It may be displayed on the terminal 400 of the first user to be distinguished.

On the other hand, the service server 100 that has received the used conversion request for the corresponding digital content requests the block chain network 200 to change the used status information of the corresponding digital content (S130).

The block chain network 200 records the change of the used state information of the corresponding digital content including the inactive value to the active value through the smart contract for the corresponding digital content according to the request received from the service server 100. 3 A distributed ledger recording step (S140) is performed. More specifically, the third distributed ledger recording step (S140) determines whether the unique identification information of the user added in the second distributed ledger recording step (S110) matches the unique identification information included in the used conversion request information, Used status information including the deactivation value added in the second distributed ledger recording step (S110) after verification is performed using the signature of the private key included in the used conversion request whether the first user actually requested the used conversion record the change to the active value.

On the other hand, in the third distributed ledger recording step (S140), it is determined whether the period corresponding to the required period information 636 of the digital content has been exceeded for the digital content to be converted to used, and when it is exceeded, the used state information Changes to the activation value of can be recorded.

On the other hand, if the block chain network 200 includes a separate DB for storing the latest state of the smart contract and the smart contract created in the node 210.K, the DB is changed in the third distributed ledger recording step. Records may be included.

6 schematically illustrates a process of pre-purchasing digital content according to an embodiment of the present invention.

As shown in FIG. 6 , in the blockchain network 200 , based on the used purchase request information received from the terminal 500 of the second user who wants to purchase the digital content used, the digital content of the distributed ledger is A record of adding the information of the second user to the content registration information 600 is recorded, and the transfer record of preset points from the electronic wallet of the second user to the electronic wallet of the first user and the electronic wallet of the digital content provider is recorded. A fourth distributed ledger recording step (S230) of recording in the distributed ledger is performed.

Specifically, the service server 100 has one or more second-hand purchasable digital contents registered in the DB based on a request from the terminal 500 of the second user who wants to purchase the digital contents second-hand, preferably second-hand state information. It is possible to provide list information for digital content including an activation value, and the list information is displayed on the display device of the second user's terminal 500 so that the second user can provide used purchase request information for specific digital content. can be entered. The second user's terminal 500 transmits the used purchase request information for the digital content selected by the second user to the service server 100 (S150). Preferably, the used purchase request information may include address information of the electronic wallet included in the second user's terminal 500 and unique identification information of the second user.

The service server 100 performs a step (S160) of requesting the second-hand purchase of the corresponding digital content to the block chain network 200 according to the second-hand purchase request information received from the terminal 500 of the second user. do. On the other hand, in another embodiment of the present invention, after determining whether the points recorded in the electronic wallet included in the terminal 500 of the second user are equal to or more than the points corresponding to the middle price information 633 of the digital content, the middle price In the case of more than the point corresponding to the information 633 , it is possible to request the execution of the second-hand purchase of the corresponding digital content to the block chain network 200 . On the other hand, the determination of the points recorded in the electronic wallet included in the terminal 500 of the second user described above may be performed through a smart contract for the corresponding digital content in the block chain network 200 .

On the other hand, the fourth distributed ledger recording step (S230) is derived based on the third point corresponding to the used price information 633 withdrawn from the electronic wallet of the second user and the middle price allocation information 634 Based on the transfer record of the first user to the electronic wallet of the fourth point and the third point to the electronic wallet of the digital content provider, the middle price allocation information 634 and the middle price allocation information 635 The transfer record of the derived 5th point is recorded in the distributed ledger.

More specifically, when the block chain network 200 receives a request to perform second-hand purchase of the corresponding digital content from the service server 100, the point for second-hand purchase of the corresponding digital content according to the smart contract for the corresponding digital content. carry out the transfer First, the third point corresponding to the used price information 633 of the digital content is withdrawn (S170) from the electronic wallet of the second user who wants to purchase the digital content second-hand, and the total points of the electronic wallet of the second user are withdrawn (S170). is subtracted by the third point (S180). On the other hand, the fourth point calculated in consideration of the used price allocation information 634 of the corresponding digital content from the third point withdrawn is transferred (S190) to the electronic wallet of the first user who sells the corresponding digital content, and the The fourth point is deposited in the electronic wallet of the first user (S200). More specifically, the fourth point corresponds to a difference between the third point and a result of multiplying the third point by a ratio corresponding to the middle and high price allocation information 634 of the corresponding digital content and the third point. In addition, the fifth point calculated in consideration of the middle and high price allocation information 634 and the medium and high price allocation information 635 of the corresponding digital content at the third point is transferred (S210) to the electronic wallet of the corresponding digital content provider (S210), and the digital The fifth point is deposited in the electronic wallet of the content provider (S220).

On the other hand, in another embodiment of the present invention, in the case of the remaining points obtained by subtracting the fourth point and the fifth point from the third point, the electronic wallet of the corresponding service server 100, preferably the corresponding service server 100 can be transferred to

For example, if the middle price information 633 of the digital content 'A' is 800 points, the middle price allocation information 634 is 25%, and the middle price allocation information 635 is 50%, the digital content 'A' Withdraw 800 points corresponding to the 3rd point from the electronic wallet of the second user who wants to purchase used 600 points corresponding to the difference is calculated as the 4th point and deposited into the electronic wallet of the first user who sells digital content 'A', and the used price allocation information (634) 25% from 800 points corresponding to the 3rd point And 100 points corresponding to the fifth point to which 50% of the middle price dividend information (635) is applied is deposited into the electronic wallet of the provider of digital content 'A', and the remaining 100 points are deposited into the electronic wallet of the service server 100, , the above-described point transfer process may be performed based on a smart contract for the corresponding digital content.

Meanwhile, the blockchain network 200 performs a fourth distributed ledger recording step (S230) of adding the transfer records for the third point, the fourth point, and the fifth point to the distributed ledger. More specifically, in the fourth distributed ledger recording step (S230), the transfer record is added to the distributed ledger, and the user who has currently purchased the digital content is uniquely identified in order to record the user in the digital content registration information (600). Information and second-hand state information on whether the digital content is in a used state may be further added. Preferably, the user's unique identification information may correspond to the user's electronic wallet address information, and the used status information of the corresponding digital content including the activation value for second-hand sales may be changed back to an inactive value, and later When the second user performs a used conversion request in order to sell the digital content used, the used state information of the digital content may be changed to an activation value.

In another embodiment of the present invention, when the block chain network 200 includes a smart contract created in the node 210.K and a separate DB for storing the latest state of the smart contract, the DB includes the fourth distribution It may include records performed in the ledger recording step (S230).

Meanwhile, in the aforementioned distributed ledger, various information such as digital content registration, distribution, point movement or transfer, and electronic wallet information in the present invention may be recorded in the form of a transaction. The digital content registration information 600 may be recorded in such a distributed ledger, and point information recorded in each electronic wallet for a provider of digital content or a user who purchases new or used digital content, for example, a point holding point , information on the moved or transferred points may be recorded in a form included in the digital content registration information 600 on the distributed ledger, or in a form other than the digital content registration information 600 of the distributed ledger. It can also be registered as data. For example, an item called point data may exist as a data category recorded in the distributed ledger, and as such, information about a point of a provider or a user of the digital content may be recorded as an item called point data. However, as described above, the point data may be included in the digital content registration information 600 .

7 schematically illustrates a verification process performed to provide corresponding digital content in response to a user's request for provision according to an embodiment of the present invention.

As shown in FIG. 7 , in the verification process, the service server 100 provides the digital content to the first user's terminal 400 according to the request of the first user's terminal 400 . New digital content provision step; and a second-hand digital content providing step of providing, in the service server 100, the digital content to the second user's terminal 500 according to a request from the second user's terminal 500; verification for performing It can be done as a process.

Specifically, the first user's terminal 400 transmits, to the service server 100, provision request information for a specific digital content to be provided among one or more digital contents that the first user purchased new or used ( S240) is performed. More specifically, the provision request information may include a value for the signature of the corresponding user's private key and unique identification information, and the unique identification information may include electronic wallet address information of the corresponding user.

The service server 100 receiving the provision request information from the terminal 400 of the first user requests verification for providing the corresponding digital content to the block chain network 200 based on the provision request information ( S250) is performed.

On the other hand, the blockchain network 200 that has been requested to verify through the step (S250) includes the user's unique identification information currently recorded in the corresponding digital content through the smart contract for the corresponding digital content and the user included in the verification request. It is determined whether the unique identification information matches, and a step (S260) of verifying the signature of the user's private key included in the verification request using the public key corresponding to the private key is performed.

When verification is normally completed through the step S260 , the service server 100 may provide the corresponding digital content pre-stored in the DB to the terminal 400 of the first user. Preferably, instead of downloading a file for fully executing the digital content, the digital content is provided to the first user's terminal 400 in a streaming manner to prevent unauthorized copying and transmission of the digital content. .

On the other hand, the verification process shown in FIG. 7 illustrates a verification process performed when the service server 100 provides the corresponding digital content to a user who has purchased the digital content, but the user purchases digital content new or used. A corresponding verification process may also be performed in the process.

8 schematically shows a connection structure of blocks stored in a blockchain network according to an embodiment of the present invention.

As shown in FIG. 8, blocks 700.1, 700.2, and 700.3, which are storage units in the block chain network 200, may be connected to each other to constitute a block chain. The blocks 700.1, 700.2 and 700.3 may consist of a block header and a transaction. The block header may include a hash value of a previous block header, a nonce value, and a hash value of a transaction group (merkle tree). The Nonce value is a value that a node included in the blockchain network 200 changes to create blocks 700.1, 700.2 and 700.3. When the hash value of the block header is smaller than the preset difficulty value, the corresponding block A hash value for the header may be determined. The hash value of the transaction group (merkle tree) may mean a root hash value of data included in one or more transactions.

As shown in FIG. 8 , since the hash value of the block header of block #14 is used as an input value to derive the hash value of the block header of block #15, block #14 and block #15 can be connected. In addition, in deriving the hash value of the block header, since the hash value of the transaction group (Merkle Tree), which is a hash value representing one or more transactions, is used as an additional input value, when forgery occurs in a transaction, the transaction group Since the hash value of is changed, forgery can be prevented. In this way, neighboring blocks 700.1, 700.2 and 700.3 can be connected to each other, and transaction information in blocks 700.1, 700.2 and 700.3 can be stored in integrity.

The transactions of blocks 700.1, 700.2, and 700.3 are transactions included in blocks 700.1, 700.2, and 700.3 among the performed transactions. The operation may be performed in the blockchain network 200 .

A, B, C, D, E, and F of the transaction shown in FIG. 8 may correspond to addresses used in the blockchain network 200, such as the above-described address information of the electronic wallet. In addition, Contract #1 and Contract #2 of the transaction may mean smart contracts for each digital content.

The transaction in block #14 shown may include a transaction (Tx 1) that transmits 60 points from A to B, and a transaction (Tx 2) in which Contract #1 is generated or performed by C. Meanwhile, although not shown in FIG. 8 , the above-described digital content registration information 600 may also be recorded in a transaction of a block.

On the other hand, in another embodiment of the present invention, the block headers of blocks 700.1, 700.2 and 700.3 are the hash value (ParentHash) of the parent block (previous block), and the uncle block of the current block (the difficulty of the block is relatively low) The hash value (UncleHash) of blocks that have not been adopted), the account address to receive the transaction fee after mining (Coinbase), the hash value of the root node of the Merkle Patricia tree where account status information is gathered (Root), and all transactions in the block Hash value of the root node of the Merkle tree for each transaction (TxHash), the hash value of the root node of the Merkle tree of receipts for all transactions in the block (ReceiptHash), 32-byte bloom filter information used to use log information (Bloom), the previous block Block difficulty calculated by the difficulty and timestamp of the block (Difficulty), the current block number (Number), and the sum of the maximum gas payable per block (concept of cost (token) used to process a transaction/smart contract) (GasLimit), A value used to ensure a sufficient number of calculations to calculate the hash value in the total amount of gas used in transactions in the block (GasUsed), the initial creation time of the block (Time), other information of the block (Extra), and/or the proof-of-work (MixDigest, Nonce) may be included.

According to an embodiment of the present invention, since digital content registration information is recorded in the distributed ledger of the block chain network, it is possible to exhibit the effect of transparently managing purchase details in purchasing the corresponding digital content.

According to one embodiment of the present invention, since preset points are transferred from the electronic wallet of the new purchaser to the electronic wallet of the digital content provider according to the distributed ledger in which the digital content registration information is recorded, a separate point of the purchaser or the digital content provider It is possible to exert the effect of purchasing digital content without performing distribution.

According to an embodiment of the present invention, a verification process is performed based on the value of the signature of the private key received from the terminal of the user who purchased the digital content, and when the verification is completed, the corresponding digital content is provided to the terminal of the user Therefore, it is possible to exert the effect of strengthening security in providing digital content.

According to an embodiment of the present invention, the digital content registration information includes information about the period required for secondaryization, so that the corresponding digital content can be sold second-hand after the period corresponding to the period information required for secondaryization is exceeded. This can have the effect of preventing the sale of second-hand digital contents purchased in the first place.

According to an embodiment of the present invention, when a user newly purchases digital content or purchases second-hand digital content, the information of the corresponding purchaser is recorded in the distributed ledger, so that the digital content can be managed transparently and the recorded user Since the digital content is provided by determining whether the information of the user and the user requesting the provision of the digital content match, it is possible to enhance the security.

According to an embodiment of the present invention, according to the distributed ledger in which digital content registration information is recorded, the electronic wallet of the user who purchases preset points is transferred to the electronic wallet of the digital content provider and the electronic wallet of the user who sells it used. Therefore, it is possible to exert the effect of being able to purchase second-hand digital contents without performing an operation for distributing separate points of the corresponding subjects.

9 schematically illustrates an internal configuration of a computing device according to an embodiment of the present invention.

As described above, the service server, the node included in the block chain network, the terminal of the digital content provider, and the user's terminal may include one or more modules of the computing device shown in FIG. 9 .

9, the computing device 11000 includes at least one processor 11100, a memory 11200, a peripheral interface 11300, an input/output subsystem ( I/O subsystem) 11400 , a power circuit 11500 , and a communication circuit 11600 may be included at least. In this case, the computing device 11000 may correspond to the service server, a node included in the block chain network, a terminal of a digital content provider, and a terminal of a user.

The memory 11200 may include, for example, a high-speed random access memory, a magnetic disk, an SRAM, a DRAM, a ROM, a flash memory, or a non-volatile memory. have. The memory 11200 may include a software module, an instruction set, or other various data necessary for the operation of the computing device 11000 .

In this case, access to the memory 11200 from other components such as the processor 11100 or the peripheral interface 11300 may be controlled by the processor 11100 . The processor 11100 may be configured as a single or a plurality of processors, and may include a GPU and a TPU type processor in order to improve operation processing speed.

Peripheral interface 11300 may couple input and/or output peripherals of computing device 11000 to processor 11100 and memory 11200 . The processor 11100 may execute a software module or an instruction set stored in the memory 11200 to perform various functions for the computing device 11000 and process data.

The input/output subsystem 11400 may couple various input/output peripherals to the peripheral interface 11300 . For example, the input/output subsystem 11400 may include a controller for coupling a peripheral device such as a monitor, keyboard, mouse, printer, or a touch screen or sensor as required to the peripheral interface 11300 . According to another aspect, input/output peripherals may be coupled to peripheral interface 11300 without going through input/output subsystem 11400 .

The power circuit 11500 may supply power to all or some of the components of the terminal. For example, the power circuit 11500 may include a power management system, one or more power sources such as batteries or alternating current (AC), a charging system, a power failure detection circuit, a power converter or inverter, a power status indicator, or a power source. It may include any other components for creation, management, and distribution.

The communication circuit 11600 may enable communication with another computing device using at least one external port.

Alternatively, as described above, if necessary, the communication circuit 11600 may transmit and receive an RF signal, also known as an electromagnetic signal, including an RF circuit, thereby enabling communication with other computing devices.

This embodiment of FIG. 9 is only an example of the computing device 11000, and the computing device 11000 may omit some components shown in FIG. 9 or further include additional components not shown in FIG. 9, or 2 It may have a configuration or arrangement that combines two or more components. For example, a computing device for a communication terminal in a mobile environment may further include a touch screen or a sensor in addition to the components shown in FIG. 9 , and may include various communication methods (WiFi, 3G, LTE) in the communication circuit 11600 . , Bluetooth, NFC, Zigbee, etc.) may include a circuit for RF communication. Components that may be included in the computing device 11000 may be implemented as hardware, software, or a combination of both hardware and software including an integrated circuit specialized for one or more signal processing or applications.

Methods according to an embodiment of the present invention may be implemented in the form of program instructions that can be executed through various computing devices and recorded in a computer-readable medium. In particular, the program according to the present embodiment may be configured as a PC-based program or an application dedicated to a mobile terminal. The application to which the present invention is applied may be installed in the user terminal through a file provided by the file distribution system. As an example, the file distribution system may include a file transmission unit (not shown) that transmits the file according to a request of the user terminal.

The device described above may be implemented as a hardware component, a software component, and/or a combination of the hardware component and the software component. For example, devices and components described in the embodiments may include, for example, a processor, a controller, an arithmetic logic unit (ALU), a digital signal processor, a microcomputer, a field programmable gate array (FPGA). , a programmable logic unit (PLU), a microprocessor, or any other device capable of executing and responding to instructions, may be implemented using one or more general purpose or special purpose computers. The processing device may execute an operating system (OS) and one or more software applications executed on the operating system. The processing device may also access, store, manipulate, process, and generate data in response to execution of the software. For convenience of understanding, although one processing device is sometimes described as being used, one of ordinary skill in the art will recognize that the processing device includes a plurality of processing elements and/or a plurality of types of processing elements. It can be seen that can include For example, the processing device may include a plurality of processors or one processor and one controller. Other processing configurations are also possible, such as parallel processors.

Software may comprise a computer program, code, instructions, or a combination of one or more thereof, which configures a processing device to operate as desired or is independently or collectively processed You can command the device. The software and/or data may be any kind of machine, component, physical device, virtual equipment, computer storage medium or device, to be interpreted by or to provide instructions or data to the processing device. , or may be permanently or temporarily embody in a transmitted signal wave. The software may be distributed over networked computing devices, and may be stored or executed in a distributed manner. Software and data may be stored in one or more computer-readable recording media.

The method according to the embodiment may be implemented in the form of program instructions that can be executed through various computer means and recorded in a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, etc. alone or in combination. The program instructions recorded on the medium may be specially designed and configured for the embodiment, or may be known and available to those skilled in the art of computer software. Examples of the computer-readable recording medium include magnetic media such as hard disks, floppy disks and magnetic tapes, optical media such as CD-ROMs and DVDs, and magnetic such as floppy disks. - includes magneto-optical media, and hardware devices specially configured to store and carry out program instructions, such as ROM, RAM, flash memory, and the like. Examples of program instructions include not only machine language codes such as those generated by a compiler, but also high-level language codes that can be executed by a computer using an interpreter or the like. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.

As described above, although the embodiments have been described with reference to the limited embodiments and drawings, various modifications and variations are possible from the above description by those skilled in the art. For example, the described techniques are performed in a different order than the described method, and/or the described components of the system, structure, apparatus, circuit, etc. are combined or combined in a different form than the described method, or other components Or substituted or substituted by equivalents may achieve an appropriate result. Therefore, other implementations, other embodiments, and equivalents to the claims are also within the scope of the following claims.

Claims (5)

As a digital content distribution and used transaction system including a block chain network and service server,
a digital content registration step of registering, in the service server, digital content received from a terminal of a digital content provider in a DB of the service server;
In the blockchain network, the first to record digital content registration information including information on the digital content, information on the provider of the digital content, and transaction-related information of the digital content in the distributed ledger of the blockchain network distributed ledger recording stage;
In the block chain network, based on the new purchase request information received from the terminal of the first user who wants to purchase the digital content, a point set in advance from the electronic wallet of the first user to the electronic wallet of the digital content provider. a second distributed ledger recording step of recording a transfer record in the distributed ledger and adding the information of the first user to the digital content registration information of the distributed ledger;
a new digital content providing step of providing, in the service server, the digital content to the first user's terminal in response to a provision request of the first user's terminal;
a third distributed ledger recording step of recording, in the block chain network, that a used transaction is possible in the digital content registration information according to a used conversion request of the first user's terminal;
In the block chain network, based on the second-hand purchase request information received from the terminal of the second user who wants to purchase the digital content second-hand, a record of adding the second user's information to the digital content registration information of the distributed ledger and a fourth distributed ledger recording step of recording, in the distributed ledger, a transfer record of a preset point from the second user's electronic wallet to the first user's electronic wallet and the digital content provider's electronic wallet; and
performing, in the service server, a second-hand digital content providing step of providing the digital content to the second user's terminal in response to a request from the second user's terminal;
In the first distributed ledger recording step,
Transaction-related information of the digital content,
and information about the period required for second-hand use including information on the time when the digital content can be sold second-hand,
The second distributed ledger recording step further adds used state information including an inactivation value to the digital content registration information,
In the third distributed ledger recording step, the used state information is changed to an activation value in response to a used conversion request of the first user's terminal for digital content that has exceeded a time point corresponding to the second-hand required period information. Content distribution and used trading system.
The method according to claim 1,
In the first distributed ledger recording step,
The information on the provider of the digital content included in the digital content registration information recorded in the distributed ledger of the block chain network includes address information on the electronic wallet of the digital content provider,
The digital content transaction-related information included in the digital content registration information further includes new price information, new price allocation information, second-hand price information, middle-to-higher price allocation information, and middle-to-higher price allocation information, digital content distribution and used transaction system .
The method according to claim 1,
In the first distributed ledger recording step, the transaction-related information of the digital content further includes new price information and new price allocation information,
The second distributed ledger recording step is
The transfer record of the first point corresponding to the new price information withdrawn from the electronic wallet of the first user and the second point derived based on the new price allocation information to the electronic wallet of the digital content provider is recorded in the distributed ledger Recorded in, digital content distribution and used trading system.
delete The method according to claim 1,
In the first distributed ledger recording step, the transaction-related information of the digital content further includes used price information, middle price allocation information, and middle price allocation information,
In the fourth distributed ledger recording step,
A third point corresponding to the second-hand price information withdrawn from the second user's electronic wallet and a fourth point derived based on the second-hand price allocation information to the electronic wallet of the first user;
A digital content distribution and used transaction system that records the transfer record of the third point, the middle and high price allocation information, and the fifth point derived based on the middle and high price allocation information in the distributed ledger to the electronic wallet of the digital content provider .

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