KR20200087418A - System for security enforced crypto currency based on block chain - Google Patents

Abstract

The present invention relates to a blockchain-based security-enhanced cryptocurrency system and, more specifically, to the blockchain-based security-enhanced cryptocurrency system which can allow a service to be safely used by tracking cryptocurrency transactions in a blockchain-based cryptocurrency system to ensure anonymity since individuals cannot be identified.

Description

Cryptocurrency system with enhanced security based on blockchain{SYSTEM FOR SECURITY ENFORCED CRYPTO CURRENCY BASED ON BLOCK CHAIN}

The present invention relates to a cryptocurrency system with enhanced security based on blockchain, and more specifically, by tracking transactions of cryptocurrency in the blockchain-based cryptocurrency system, so that anonymity is guaranteed because an individual cannot be identified, It is related to a blockchain-based security-enhanced cryptocurrency system that enables safe use of services.

As the concept of blockchain-based cryptocurrency has spread, and the number of practical applications has increased, various services can be used through cryptocurrency.

Cryptocurrency is electronic information that can be distributed and issued through encryption (e.g., hash) using blockchain technology, and used as currency on the network, using the peer-to-peer (P2P) method on the Internet. It is distributed, stored, operated and managed, and functions as a distributed ledger.

In other words, blockchain is a digitalized, decentralized public ledger used in cryptocurrency transactions. Each block contains a confirmed transaction history for a period of time, and this block is sent to all participants in the network, allowing participants to track digital currency transactions without a central ledger.

Cryptocurrency was originally designed as a medium of goods exchange, that is, as a kind of payment method, but it has no face value at present, and has become the purpose of investment, and has been traded through exchanges at prices formed according to the supply and demand of the market. Therefore, if you invest in cryptocurrency, income or loss will occur.

There is a public blockchain that anyone can participate as a trading party, a private blockchain that is a method mainly used by financial institutions, and a large number of managers. And a consortium blockchain where decisions are made according to the agreement of the nodes.

To complement the limitations of the existing blockchain public blockchain, a consortium blockchain and a private blockchain appeared. Therefore, it is advantageous to use a private blockchain if service stability is important, and a public blockchain if reliability is important.

In addition, there is a side chain, and if the consortium blockchain and private blockchain are chains to replace the existing blockchain, the side chain can utilize the resources of blockchains with different functions to activate the blockchain platform. It is a technology to secure interoperability between existing blockchains.

In particular, bitcoin (bitcoin) refers to an online virtual currency (digital currency) that does not have a physical form unlike banknotes or coins. It was created to create a new currency that works without the intervention of centralized power, and introduced blockchain technology, which is a decentralized ledger that allows individuals and individuals to exchange money directly and without going through a bank.

Bitcoin is traded anonymously, and anyone with a computer connected to the Internet can open a Bitcoin account. As such, Bitcoin believes that it is an anonymous currency, but this is partially correct, but it is not in any way. It is actually anonymous, not anonymous. All Bitcoin transactions do not contain information about traders, but the transaction records themselves are recorded and published on the blockchain.

Of course, the ultimate goal of Bitcoin is to create a global financial system that is ideally completely decentralized and secures anonymity, so it has a structure that does not disclose user data, but can be used to identify individuals when used without care. And personal information may be disclosed thereby.

Unlike companies that provide services in exchange for taking financial gains or receiving personal information, Bitcoin can work well without personal information because it does not aim for financial gains, but if you look at whether it is actually anonymous, Bitcoin The asset can be tracked as long as it can link the public address with the individual. If you use the blockchain in this way, you can check all transaction details that the user participated in.

If you look at the data stored in the blockchain, you can check the start address, target address, sending number and date information of the transaction. Nobody knows who the owner of this address is, and in fact, the address doesn't hold any information about the owner. However, when the actual transaction tracking is performed, the secrets of the blockchain are unlocked. This is because, when making payments using Bitcoin, it is possible to track the flow of money on the blockchain even if the trader does not reveal the identity.

When a computer or mobile device makes a payment, it records personal information such as the IP address of the hardware used by the trader. In reality, a company may be looking at a bitcoin transmission record that travels to and from a typical network for a long time and store the related IP. Therefore, by looking at the bitcoin transmission history going to and from the network, the IP address of the hardware used by the trader is found, and from this, the personal information of the trader is tracked in more detail.

Therefore, in the present invention, in order to solve such a problem, two or more cryptocurrencies are used, and these cryptocurrencies are tracked to exchange an individual into a transaction that cannot be specified. In other words, public cryptocurrency is exchanged by creating an internal cryptocurrency, which is a pool of currencies with multiple participants with the same value and simultaneously participating in it. By doing so, it is intended to provide a cryptocurrency system that ensures anonymity by not allowing someone to identify an individual by tracking the account of the cryptocurrency.

Next, the prior art existing in the technical field of the present invention will be briefly described, and then the technical matters to be achieved differently from the prior art will be described.

U.S. Patent Publication No. US 2018/0307859 A1 (2018.10.25.) relates to a system and method for strengthening centralized privacy control in a decentralized system, and data in a distributed ledger data structure such as a blockchain. It relates to a system for improving both data privacy/anonymity and data values where subject-related data is used and stored.

The prior art minimizes re-identification and risk by unauthorized persons. In addition, by granting access to only data relating to the purpose, duration, location, and other levels of obfuscation of specific data values, data containing similar identifiers related to the data subject is granted to authorized persons. Make it public. In particular, it is a technology through a kind of proxy that does not clearly understand the meaning even after reading data on the blockchain by changing it to disassociation, replacement, etc. before recording the information on the blockchain. Instead, in the case of a query, if it passes a legitimate authentication, when fetching the value from the blockchain, it goes through this proxy again, and some sort of decryption proceeds to retrieve the original. Therefore, the technology presented in the prior art maintains a certain level of privacy and anonymity while still satisfying the immutability, auditability and verification required by blockchain and other distributed ledger technologies for distributed storage of transaction data. do.

On the other hand, Korean Registered Patent KR 1833323 (2018.02.22.) is about a method of confirming the intention to use a blockchain, and more specifically, an intention to guarantee anonymity and prevent Sybil Attack It's about how to check. In order to prevent the Civil attack, it is necessary to ensure the uniqueness of the participants, and in the end, sensitive personal information must be collected and stored. This undermines the privacy and anonymity of the user, and rather free display of intention may be limited. By applying a homogeneous password that can be calculated in an encrypted state, it is possible to guarantee the uniqueness and anonymity of the user at the same time. This prior art overcomes the disadvantages of online pseudo-display methods such as counterfeiting, tampering, and coercion while maintaining the advantages of the online pseudo-marking verification method, while ensuring anonymity and fundamentally blocking cyber attacks, and allowing participants to The aim is to provide a method for confirming the intention to confirm whether or not one's doctor is properly reflected in the results.

On the other hand, the technology proposed in the present invention is to make it impossible to specify who the actual cryptocurrency is, even if the data related to the blockchain is disclosed and the cryptocurrency is tracked. That is, instead of changing the information stored in the blockchain itself, two or more identifiers (e-wallets) that can identify an entity are created to identify the identifiers that may be exposed due to external use and actual service usage identifiers. It is a technology that makes it impossible to identify individuals in a transaction by separating and keeping track of transactions between them. Therefore, the technology proposed in the present invention is fundamentally different from the approach to guarantee anonymity by strengthening the access rights suggested in the prior art.

The present invention was created to solve the above problems, and secures cryptocurrency services by ensuring the anonymity by removing the possibility of identifying individuals by tracking the transactions of cryptocurrencies in a blockchain-based cryptocurrency system. It aims to provide a blockchain-based security-enhanced cryptocurrency system that enables the use of.

In addition, the present invention converts a normal public cryptocurrency into an internal cryptocurrency, but a number of people participate in the exchange to the internal cryptocurrency at once, and the public cryptocurrency and the internal cryptocurrency exchange at the same exchange rate. The object of the present invention is to provide a cryptocurrency system with enhanced security.

In addition, the present invention aims to ensure the anonymity of an individual by preventing an individual from being identified by tracking the transaction of the cryptocurrency because a plurality of participants trade using a common internal cryptocurrency.

In addition, the present invention delays the previous exchange request until there is an additional exchange request of the cryptocurrency, or participates in a virtual account of a participant including a specific service provider or trading party through the cryptocurrency, thereby allowing multiple transactions It is an object of the present invention to provide a cryptocurrency system with enhanced security based on blockchain by allowing all participants to exchange money for the same amount and distributing currency exchange transactions by dividing and distributing them multiple times. .

In addition, when the present invention is required to ensure the anonymity of an individual, such as using a medical service and paying for a cryptocurrency, it is possible to track the use of the cryptocurrency so that the individual cannot be identified, thereby enhancing security. It aims to provide a monetary system.

The blockchain-based security-enhanced cryptocurrency system according to an embodiment of the present invention receives a transaction generated by at least one client and shares the transaction with an adjacent node and a blockchain node sharing the transaction with an adjacent node. Collects one transaction to create a block, applies a transaction included in the generated block to update the balance book, and includes a block generation node that propagates the generated block to another node, and the transaction includes a specific cryptocurrency It includes the conversion to another cryptocurrency, and it is characterized by ensuring the anonymity by removing the possibility of specifying an individual by tracking the transaction of the cryptocurrency.

The cryptocurrency system further includes a currency exchange unit for converting each public cryptocurrency into an internal cryptocurrency that cannot identify each individual participant for a plurality of participants, wherein the exchange unit requests the exchange of the public cryptocurrency By delaying the previous public cryptocurrency exchange request until this addition, or by participating in the virtual account of the participant including the specific service provider or trading party through the cryptocurrency, the entire multiple participants in the same exchange transaction are the same. It is characterized in that it further comprises converting money into money, and when a participant requests a different amount of money to be exchanged, it is divided and distributed multiple times.

In addition, the blockchain-based security-enhanced cryptocurrency system further includes a reverse exchange unit for converting the internal cryptocurrency into a public cryptocurrency, and the reverse exchange unit, when the client has only the internal cryptocurrency, It characterized in that it comprises supporting to exchange the internal cryptocurrency into a public cryptocurrency to perform a transaction in the public cryptocurrency.

In addition, a method for enhancing the security of a blockchain-based cryptocurrency system according to another embodiment of the present invention includes: generating a cryptocurrency exchange transaction in a specific client; Transmitting the currency exchange transaction to a node connected to the client; Sharing the exchange transaction with another node including a block generation node at the connected node; Generating a block by collecting the cryptocurrency exchange transaction at the block generation node; Updating the balance book to which the currency exchange transaction is applied to the generated block; And propagating the generated block to the node.

Here, the exchange transaction includes, for a plurality of participants, exchanging their public cryptocurrency into an internal cryptocurrency that cannot identify each individual participant, wherein the exchange request is added to the public cryptocurrency By delaying the previous public cryptocurrency exchange request until there is, or by participating in the virtual account of the participant including the specific service provider or trading party through the cryptocurrency, the entire number of participants in the same exchange transaction is the same amount. In order to exchange money, and when a participant requests a different amount of money exchange, it further includes distributing the money exchange transaction by dividing it multiple times.

In addition, a method of enhancing the security of the blockchain-based cryptocurrency system includes: the node sharing the generated block and storing an updated blockchain exchange transaction; And providing the client with a balance book associated with the currency exchange transaction.

Meanwhile, a method of enhancing security of a blockchain-based cryptocurrency system according to another embodiment of the present invention includes: generating a cryptocurrency transaction in a specific client; Transmitting the transaction to a node connected to the client; Sharing the transaction with the other node including the block creation node at the connected node; And when a currency exchange is required to perform the transaction, converting the internal cryptocurrency into a public cryptocurrency in the client's electronic wallet.

In addition, a method for enhancing the security of the blockchain-based cryptocurrency system includes: generating a block by collecting at least one cryptocurrency transaction at the node; Updating the balance book to which the transaction is applied to the generated block, and propagating the generated block to another node; The node sharing the generated block and storing a blockchain transaction; And providing the client with a balance book associated with the currency exchange transaction.

As described above, the blockchain-based security-enhanced cryptocurrency system of the present invention tracks the transaction of the cryptocurrency to remove the possibility of specifying an individual, thereby ensuring anonymity, so that the cryptocurrency service can be safely used. It has the effect. In addition, in the present invention, when it is required to ensure the anonymity of an individual, such as using a medical service and paying for a cryptocurrency, the cryptocurrency with enhanced security cannot be identified by tracking the use of the cryptocurrency. It has the effect of providing a system.

1 is a diagram showing the configuration and exchange procedure for a cryptocurrency system with enhanced security based on a blockchain according to an embodiment of the present invention.
2 is a diagram illustrating a processing flow for a case where a plurality of participants want to exchange different amounts of money according to an embodiment of the present invention.
FIG. 3 is a diagram illustrating a process in which a public cryptocurrency is converted into an internal cryptocurrency at each blockchain node according to an embodiment of the present invention, and the corresponding blockchain transaction moves.
4 is a block diagram showing the configuration of each node that processes a currency exchange transaction between a public cryptocurrency and an internal cryptocurrency according to an embodiment of the present invention.
5 is a flowchart illustrating a process of converting a public cryptocurrency into an internal cryptocurrency in a cryptocurrency system with enhanced security based on blockchain according to an embodiment of the present invention.
6 is a flowchart showing a process of processing a cryptocurrency transaction in a cryptocurrency system with enhanced security based on a blockchain according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the blockchain-based security-enhanced cryptocurrency system of the present invention. The same reference numerals in each drawing denote the same members. Also, specific structural or functional descriptions of the embodiments of the present invention are exemplified for the purpose of describing the embodiments according to the present invention, and unless defined otherwise, all terms used herein, including technical or scientific terms. These have the same meaning as those generally understood by those of ordinary skill in the art. Terms such as those defined in a commonly used dictionary should be interpreted as having meanings consistent with meanings in the context of related technologies, and should not be interpreted as ideal or excessively formal meanings unless explicitly defined herein. It is desirable not to.

1 is a diagram showing the configuration and exchange procedure for a cryptocurrency system with enhanced security based on a blockchain according to an embodiment of the present invention.

As shown in FIG. 1, the blockchain-based security-enhanced cryptocurrency system according to the present invention is composed of a plurality of nodes 100 and a client 200 capable of accessing each node.

For example, ① the client (C1) 200 creates a transaction that converts a public cryptocurrency into an internal cryptocurrency, and ② the client (C1) 200 encrypts it with its own secret key. The exchange transaction is transmitted to the corresponding node. ③ The transferred currency exchange transaction is shared among the distributed network nodes 100. ④ The shared currency exchange transaction is collected by the block creation node 100 to create a block. At this time, exchanging a public cryptocurrency for internal cryptocurrency is desirable to involve a large number of participants at a time so that all participants can exchange at the same amount through a single exchange transaction. To this end, multiple participants are involved in a single exchange transaction by delaying the previous exchange request until a further exchange request for cryptocurrency is made, or by participating in a virtual account of a participant including a specific service provider or trading party through the cryptocurrency. If the whole is to be exchanged for the same amount, and each participant requests a different amount of exchange, the exchange transaction can be performed by dividing and distributing the exchange multiple times. ⑤ Next, the block creation node updates the balance book by applying the transaction of the generated block. ⑥ Then, the block creation node propagates the updated block to each node. ⑦ Each node shares the propagated block. Accordingly, each participant can check the result of the corresponding transaction through the clients C1 and C2. Here, all nodes constituting the blockchain network can be a block generation node, or only some of the nodes can be created.

The present invention provides a blockchain-based security-enhanced cryptocurrency system that can safely use cryptocurrency services by ensuring the anonymity by removing the possibility of specifying individuals by tracking the transactions of cryptocurrency. That is, according to the present invention, since a plurality of participants trade using a common internal cryptocurrency, it is possible to track the transaction of the cryptocurrency so that the individual cannot be identified, thereby ensuring the anonymity of the individual.

The present invention is to convert a normal public cryptocurrency into an internal cryptocurrency, but to exchange the internal cryptocurrency at a time, a large number of people participate at a time, and the public cryptocurrency and the internal cryptocurrency to exchange at the same exchange rate. By providing a cryptocurrency system with enhanced security. More specifically, by delaying the previous exchange request until there is an additional exchange request for cryptocurrency, or by participating in a virtual account of a participant, including a specific service provider or trading party through the cryptocurrency, multiple transactions are exchanged in one exchange. To ensure that all participants of the exchanger exchange money for the same amount, and to request exchange of different amounts for each participant, the exchange transaction is divided and distributed multiple times.

As a result, when the present invention is required to guarantee the anonymity of an individual, such as using medical services and paying in cryptocurrency, anonymity is guaranteed because the use of the cryptocurrency cannot be tracked to identify the individual. Security.

2 is a diagram illustrating a processing flow for a case where a plurality of participants want to exchange different amounts of money according to an embodiment of the present invention.

As shown in Figure 2, it shows an example of the exchange of two cryptocurrencies, A, B. If the users requesting currency exchange between the two cryptocurrencies are P1 to P5, they must have an account for cryptocurrency A and an account for cryptocurrency B. For example, P1: 40, P2: 20, P3: 10, P4: 80, and P5: 50 cryptocurrency A are held, and each wants to be converted into cryptocurrency B. Every exchange transaction is made once every 10 minutes (M), and only 10 exchanges are made per account, and if the exchange rate is 1, exchange is performed through the following process.

First, for T=10M, cryptocurrency A is exchanged 10 times for B for exchangers P1 and P2, and as a result, the balance is settled and stored. Next, at T=20M (minutes), for each exchange requester P1, P2, and P3, 10 are exchanged for cryptocurrency A to B, and the balance after the transaction is recorded. At this time, 20 of cryptocurrency A remains in P1, and there is no balance of cryptocurrency A in P2 and P3. Therefore, for P2 and P3, there is no currency exchange after this.

Subsequently, at T=30M, the cryptocurrency A of the exchangers P1 and P4 is converted into B, and the balance after the transaction becomes 10 and 70, respectively. When 10 cryptocurrency A of P1, P4, and P5 are exchanged for 10 each at T=40M, the balance will be 0, 60, 40, respectively, and at T=50M, 10 exchange will be made for each exchange requester P4, P5. Subsequently, T=60M is continuously repeated to exchange money by 10. In this way, currency exchange is performed until the balance of cryptocurrency A is gone, and cryptocurrency A is all exchanged in B.

As described above, since cryptocurrency A is a public cryptocurrency account, it is possible to specify an individual, but if you exchange a currency exchange transaction for the same amount by bundling a large number of currency exchangers every 10 minutes, the account of the cryptocurrency B actually exchanged can match the individual. There is no actual transaction through cryptocurrency B.

Cryptocurrency accounts classified as public cryptocurrencies can identify individuals, so in case of sensitive matters that should not allow individuals to be identified, they are converted into internal cryptocurrencies, but exchange between public cryptocurrencies and internal cryptocurrencies By allowing multiple accounts to participate at the same exchange rate, it is not possible to match an already exposed public cryptocurrency account with an internal cryptocurrency account.

As described above, until a further exchange request for cryptocurrency is added, the previous exchange request is delayed so that multiple participants gather, so that all the multiple participants exchange money at the same amount in one exchange transaction, and the participants When requesting a different amount of money for each exchange, the money exchange transaction is divided into multiple times and distributed.

On the other hand, a virtual account of a participant including a specific service provider or trading party through a cryptocurrency is used as an account of an internal cryptocurrency, a block according to currency exchange is generated, and the transaction of the internal cryptocurrency with the generated block And balance can be managed.

FIG. 3 is a diagram illustrating a process in which a public cryptocurrency is converted into an internal cryptocurrency at each blockchain node according to an embodiment of the present invention, and the corresponding blockchain transaction moves.

As shown in FIG. 3, when a client creates a public cryptocurrency transaction and transmits it to each node, each node shares the transaction, collects the transactions at the block creation node, creates a block, and applies the transaction of the block to balance Update your books. When the updated block is propagated, all blockchain nodes share it, and each node stores the blockchain in the public cryptocurrency blockchain transaction database 300.

If at least one client requests a currency exchange, each node shares the transaction related to the currency exchange request between each node, and the block creation node collects the shared currency exchange transactions to create a block, and applies the block transaction to the balance book. When updating and propagating the block, each node shares the block. At this time, each node stores the blockchain in the internal cryptocurrency blockchain transaction database 400. If all clients request a currency exchange, the balance of the public cryptocurrency blockchain transaction database 300 is moved to the internal cryptocurrency blockchain transaction database 400. If some clients request currency exchange, the balance of cryptocurrency due to the transaction is moved from the public cryptocurrency transaction database 300 to the internal cryptocurrency transaction database 400.

The public cryptocurrency transaction database 300 and the internal cryptocurrency transaction database 400 are databases that store transaction lists, respectively, and are stored in a block chain structure. Therefore, the unusual structure of this database is called a blockchain. Therefore, using the blockchain data structure, it is possible to confirm the order of all transactions.

In the case of the present invention, since a plurality of exchange requests are simultaneously converted from public cryptocurrency to internal cryptocurrency at the same exchange rate, it is not possible to match the public cryptocurrency account with the internal cryptocurrency account. That is, since multiple accounts are allowed to participate in the exchange between the public cryptocurrency and the internal cryptocurrency at the same exchange rate, it is impossible to specify an individual for the account of the public cryptocurrency through the internal cryptocurrency account.

Here, the cryptocurrency application database 500 is an application database that applies a transaction to an application (cryptocurrency (eg, bitcoin)). The application includes converting a public cryptocurrency into an internal cryptocurrency or converting an internal cryptocurrency into a public cryptocurrency.

So far, we have described the process of creating a transaction for a public cryptocurrency, creating a block corresponding to it and storing it in each node, and then explaining the process of converting a public cryptocurrency into an internal cryptocurrency when a currency exchange request is made. .

The following describes the process of transacting a cryptocurrency that has already been exchanged and has entered the account of the internal cryptocurrency into a public cryptocurrency and trading with another client.

Each client has an account for public cryptocurrency and internal cryptocurrency, respectively. When a specific client wants to trade the public cryptocurrency, and all the balance is stored in the internal cryptocurrency, the client exchanges the internal cryptocurrency into the public cryptocurrency, and trades the exchanged public cryptocurrency with other participants. Will do. That is, the client can convert the internal cryptocurrency into a public cryptocurrency, and then provide the converted public cryptocurrency to another client.

Specifically, the client first creates a currency exchange transaction, and sends the transaction to the node. The node shares the exchange transaction with each node, and the block creation node collects these exchange requests and creates a block. The balance book is updated by applying the transaction of the generated block, and the block is propagated to each node and shared. Thereby, the balance converted from the internal cryptocurrency to the public cryptocurrency is confirmed in the account.

Subsequently, the client can make a transaction that provides the public cryptocurrency in the public cryptocurrency account to another client. This process creates the transaction desired by the client, encrypts it and sends it to the node. Nodes share the transaction, the block creation node creates a block according to the transaction, and applies the transaction of the block to update the balance book. The block is then propagated to other nodes to share the block.

During the exchange process, a virtual account of a participant including a specific service provider or trading party through a cryptocurrency is used as an account of the internal cryptocurrency, a block according to the currency exchange is generated, and the generated block is used for the internal cryptocurrency. You can also manage transactions and balances.

On the other hand, without exchanging the internal cryptocurrency into a public cryptocurrency, if the other party's trading partner wants to receive the internal cryptocurrency, it does not convert the internal cryptocurrency into a public cryptocurrency accordingly. Can be used to perform the transaction. In addition, it is possible to exchange transactions of internal cryptocurrencies into public cryptocurrencies and perform transactions at the same time. This method is effective by halving the transaction.

Hereinafter, a configuration of each node that processes currency exchange transactions for public and internal cryptocurrencies according to an embodiment of the present invention will be described.

4 is a block diagram showing the configuration of each node that processes a currency exchange transaction between a public cryptocurrency and an internal cryptocurrency according to an embodiment of the present invention.

As illustrated in FIG. 4, the node 100 includes an electronic wallet unit 110, a mining unit 120, a block chain unit 130, a routing unit 140, a currency exchange unit 150, and a reverse exchange unit 160. It is configured to include.

The electronic wallet unit 110 manages the private and public keys of the client, which is a user, and functions to generate addresses used for transactions. The electronic wallet can generate a private key, a public key from the private key, and an address with the public key. It also transmits cryptocurrencies by approving transactions. This is done by determining the authenticity of the transaction with a special signature made from the private key. The information generated here is shared or broadcast on the cryptocurrency blockchain network. The address refers to an address to send cryptocurrency.

The electronic wallet unit 110 includes managing information about a virtual account of a participant including a specific service provider or trading party through cryptocurrency.

The mining unit 120 generates a valid transaction for a certain period of time (for example, 10 minutes) as a block using a proof of work (PoW) algorithm, and connects to the blockchain. The proof-of-work prevents all nodes from making blocks at the same time, and is a kind of probabilistic consensus algorithm. The consensus is: ① The block creation node collects the requests from the clients, sorts them, and propagates them to other nodes along with the execution result. ② Nodes that receive the message from the block creation node send the message received from other nodes once again to the rest of the nodes. To propagate. ③ Every node propagates to other nodes what the same message (more than a quorum) he or she received most from another node. When the processes of ①, ②, and ③ above are completed, all nodes have the same data that has reached an agreement agreed upon by the quorum or more.

The blockchain unit 130 has a complete blockchain copy including the first block, the Genesis Block and the most recent block. It functions to connect the created block to the blockchain. The information connected by the blockchain has all information for all blocks.

The routing unit 140 is responsible for the P2P network transmission function on the blockchain.

The currency exchange unit 150 includes the technical features of the present invention, and when a currency exchange transaction is received from a client, serves to exchange a shared cryptocurrency into an internal cryptocurrency according to the currency exchange transaction. When the exchange transaction of the shared cryptocurrency is requested, the nodes share the exchange transaction, collect a specific number of exchange transactions, create a block, and reflect the transaction of the block to update the balance book resulting from the transaction. The updated block is propagated to other nodes through the routing unit 140.

Through the currency exchange unit 150, it is possible to safely use the cryptocurrency service by tracking the transaction of the cryptocurrency and removing the possibility of specifying an individual, thereby guaranteeing anonymity. The currency exchange unit 150 converts a normal public cryptocurrency into an internal cryptocurrency, but the exchange to the internal cryptocurrency involves a large number at a time, and the public cryptocurrency and the internal cryptocurrency are the same. Exchange at the exchange rate. Particularly, since a plurality of participants trade using a common internal cryptocurrency, the anonymity of the individual is guaranteed by tracking the transaction of the cryptocurrency so that the individual cannot be identified.

In addition, the exchange unit 150 delays the previous exchange request until there is an additional exchange request of the cryptocurrency, or by participating in a virtual account of a participant including a specific service provider or trading party through the cryptocurrency, When a plurality of participants exchange money at the same amount in a currency exchange transaction, and each participant requests a currency exchange of a different amount, the exchange transaction can be divided and distributed multiple times.

Through this, the present invention prevents an individual from being identified by tracking the use of the cryptocurrency when it is required to ensure the anonymity of the individual, such as using medical services and paying for the money in cryptocurrency.

Participating the virtual account may take various measures, such as temporarily issuing a virtual account at the currency exchange unit and closing the virtual account when the exchange is completed.

The reverse exchange unit 160 reflects another technical feature of the present invention, and when a specific client has only an internal cryptocurrency in an electronic wallet, when the client wants to provide a public cryptocurrency to another client , Convert the internal cryptocurrency back to a public cryptocurrency to perform the transaction.

When the client creates a transaction that provides a public cryptocurrency to another client, encrypts it, and transmits it to a node, the reverse exchange unit 160 of the node that received it does not have the public cryptocurrency in the client, so Convert the null cryptocurrency into a public cryptocurrency and store it in a public cryptocurrency blockchain transaction database, create a block according to the reverse exchange transaction with other nodes, and apply the transaction of the block to apply the public cryptocurrency and internal cryptocurrency Update the balance book of money. The block is then propagated to other nodes to share the block.

On the other hand, without having to exchange the internal cryptocurrency into a public cryptocurrency, and if the counterpart trading partner wants to receive the internal cryptocurrency, it does not convert the internal cryptocurrency into a public cryptocurrency accordingly. You can use to perform the transaction. In addition, it is possible to exchange transactions of internal cryptocurrencies into public cryptocurrencies and perform transactions at the same time. This method is effective by halving the transaction. Of course, in this process, each participant can use the virtual account to reverse exchange and then close the virtual account.

5 is a flowchart illustrating a process of converting a public cryptocurrency into an internal cryptocurrency in a cryptocurrency system with enhanced security based on blockchain according to an embodiment of the present invention.

As shown in FIG. 5, the blockchain-based security-enhanced cryptocurrency system according to the present invention first generates a cryptocurrency exchange transaction in a specific client 200 and transmits it to the connected node 100 (S110). . The connected node 100 shares the cryptocurrency exchange transaction with each node 100 of the entire blockchain network (S120).

In particular, the block creation node 100 collects the cryptocurrency exchange transactions to generate blocks (S130). In addition, the block creation node 100 updates the balance book that applies the currency exchange transaction to the generated block and propagates the generated block to another node 100 (S140).

Next, each node shares a block and stores a block chain exchange transaction (S150). By doing so, each client can check the balance book associated with the currency exchange transaction (S160).

Through this process, the transaction of the cryptocurrency can be tracked to eliminate the possibility of specifying an individual, thereby ensuring anonymity. The normal public cryptocurrency is converted into the internal cryptocurrency, but the currency is converted into the internal cryptocurrency. At a time, a large number of participants are involved, and the public cryptocurrency and the internal cryptocurrency are exchanged at the same exchange rate. Therefore, since a plurality of participants trade using a common internal cryptocurrency, it is possible to track the transaction of the cryptocurrency so that an individual cannot be identified.

In the process of exchanging, one exchange exchange transaction is delayed until a further exchange request of the cryptocurrency is added, or by participating in a virtual account of a participant including a specific service provider or trading party through the cryptocurrency In the event that a plurality of participants exchange money at the same amount, and each participant requests a different amount of money, the transaction is divided and distributed multiple times.

Therefore, when it is required to ensure the anonymity of an individual, such as using medical services and paying in cryptocurrency, the use of the cryptocurrency can be tracked so that the individual cannot be identified.

6 is a flowchart showing a process of processing a cryptocurrency transaction in a cryptocurrency system with enhanced security based on a blockchain according to an embodiment of the present invention.

As illustrated in FIG. 6, a cryptocurrency transaction is generated by a specific client 200 and transmitted to a specific node connected to the client (S210). The connected node shares the cryptocurrency transaction with all nodes (S220).

In this case, if a specific client does not have a public cryptocurrency, and only an internal cryptocurrency that can be exchanged, it is determined whether reverse exchange is necessary (S230), and the internal password in the client's electronic wallet. Currency is reversed to public cryptocurrency (S240). When a public cryptocurrency is held to perform a transaction, a block is generated by collecting cryptocurrency transactions at a block generation node without going through a reverse exchange procedure (S250). The balance book that applies the transaction to the generated block is updated, and the updated block is propagated to each node (S260). Thereafter, each node shares the updated block and stores a blockchain transaction (S270). Thus, each client can check the balance guarantee related to the transaction (S280).

As described above, the present invention secures anonymity by removing the possibility of specifying an individual by tracking the transaction of the cryptocurrency in the cryptocurrency system with enhanced security based on blockchain, and can safely use the cryptocurrency service. Security is secured by converting a normal public cryptocurrency into an internal cryptocurrency, but converting the public cryptocurrency into a number of participants at a time, and converting the public cryptocurrency and the internal cryptocurrency into the same exchange rate. It can provide an enhanced cryptocurrency system. Therefore, the present invention ensures the anonymity of the individual by not allowing the individual to be identified by tracking the transaction of the cryptocurrency because a plurality of participants trade using a common internal cryptocurrency.

In addition, the present invention delays the previous exchange request until there is an additional exchange request of the cryptocurrency, or participates in a virtual account of a participant including a specific service provider or trading party through the cryptocurrency, thereby allowing multiple transactions When all participants of the exchanger exchange money for the same amount, and each participant requests exchange of a different amount, the exchange transaction can be divided and distributed multiple times to provide a blockchain-based security-enhanced cryptocurrency system. As a result, when it is required to ensure the anonymity of an individual, such as using medical services and paying in cryptocurrency, the use of the cryptocurrency can be tracked so that the individual cannot be identified.

As described above, the present invention has been described with reference to the embodiment shown in the drawings, but this is only exemplary, and those skilled in the art to which the art pertains have various modifications and other equivalent embodiments You will understand that it is possible. Therefore, the technical protection scope of the present invention should be determined by the following claims.

100: blockchain node 200: client
300: public cryptocurrency blockchain transaction storage database
400: internal cryptocurrency blockchain transaction storage database
500: Cryptocurrency application storage database
110: electronic wallet section 120: mining section
130: Blockchain part 140: Routing part
150: currency exchange section 160: reverse exchange section

Claims (9)

A blockchain node that receives transactions generated by at least one client and shares the transactions with adjacent nodes; And
It includes; a block generation node that collects the transactions shared by the blockchain nodes to generate blocks, updates the balance book by applying the transactions included in the generated blocks, and propagates the generated blocks to other nodes.
The transaction includes the exchange of a specific cryptocurrency into another cryptocurrency, and the blockchain-based security characterized by ensuring the anonymity by removing the possibility of specifying an individual by tracking the transaction of the cryptocurrency. This enhanced cryptocurrency system. The method according to claim 1,
The cryptocurrency system,
Blockchain-based security-enhanced cryptocurrency system further comprising: a currency exchange unit for exchanging each public cryptocurrency into an internal cryptocurrency that cannot identify each individual participant for a plurality of participants. The method according to claim 2,
The currency exchange unit,
One exchange exchange transaction by delaying the exchange request of the previous public cryptocurrency until the request for the exchange of the public cryptocurrency is added or by participating in the virtual account of the participant including the specific service provider or trading party through the cryptocurrency Block-based security, further comprising allowing multiple participants to exchange money for the same amount, and requesting to exchange money of different amounts for each participant, dividing and performing exchange transactions by dividing them multiple times. Enhanced cryptocurrency system. The method according to claim 1,
It further includes a reverse exchange unit for converting internal cryptocurrency into public cryptocurrency,
The reverse exchange unit, if the client is provided with only the internal cryptocurrency, the blockchain-based blockchain characterized in that it comprises supporting to exchange the internal cryptocurrency into a public cryptocurrency to perform a transaction with the public cryptocurrency. Cryptocurrency system with enhanced security. Generating a cryptocurrency exchange transaction in a specific client;
Transmitting the currency exchange transaction to a node connected to the client;
Sharing the exchange transaction with another node including a block generation node at the connected node;
Generating a block by collecting the cryptocurrency exchange transaction at the block generation node;
Updating the balance book to which the currency exchange transaction is applied to the generated block; And
Propagating the generated block to the node; Method for strengthening the security of the blockchain-based cryptocurrency system comprising a. The method according to claim 5,
The currency exchange transaction,
Including converting each public cryptocurrency into an internal cryptocurrency that cannot identify each individual participant for a plurality of participants,
The currency exchange,
One exchange exchange transaction by delaying the exchange request of the previous public cryptocurrency until the request for the exchange of the public cryptocurrency is added or by participating in the virtual account of the participant including the specific service provider or trading party through the cryptocurrency Blockchain-based cryptocurrency system, further comprising allowing multiple participants to exchange money for the same amount, and requesting to exchange money of different amounts for each participant, dividing and distributing currency exchange transactions multiple times. How to strengthen the security of the. The method according to claim 5,
The method of strengthening the security of the blockchain-based cryptocurrency system,
The node sharing the generated block and storing the updated blockchain exchange transaction; And
Providing the client so that the balance book associated with the currency exchange transaction can be checked; further comprising the method of strengthening the security of the blockchain-based cryptocurrency system. Generating a cryptocurrency transaction in a specific client;
Transmitting the transaction to a node connected to the client;
Sharing the transaction with the other node including the block creation node at the connected node; And
A method of enhancing security of a blockchain-based cryptocurrency system comprising the steps of: converting an internal cryptocurrency into a public cryptocurrency in the client's electronic wallet when a currency exchange is required to perform the transaction. . The method according to claim 8,
The method of strengthening the security of the blockchain-based cryptocurrency system,
Generating a block by collecting at least one cryptocurrency transaction at the node;
Updating the balance book to which the transaction is applied to the generated block, and propagating the generated block to another node;
The node sharing the generated block and storing a blockchain transaction; And
Providing the client so that the balance book associated with the currency exchange transaction can be checked; further comprising the method of strengthening the security of the blockchain-based cryptocurrency system.

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