KR101995349B1 - Method of revitalizing lost cryptocurrency in blockchain network - Google Patents

Abstract

Disclosed is a method for collecting lost cryptocurrencies by a node which is connected to a blockchain network to generate a block of recording a transaction in the blockchain network. The method for collecting lost cryptocurrencies comprises: a search step of finding a lost processing target address for which a withdrawal transaction does not occur for a predetermined period for a transaction of a block generated before the predetermined period when the block is generated immediately after the predetermined period elapses from an initial block generation time of the blockchain network; an agreement step of determining that a cryptocurrency balance held by the lost processing address is permanently lost in accordance with an agreement of the nodes forming the blockchain network; and a recovery step of executing a transaction for transferring the cryptocurrency balance determined to be permanently lost from the corresponding address to a foundation address and generating and storing the transaction as the block.

Description

Method of revitalizing lost cryptocurrency in blockchain network}

The present invention relates to cryptocurrency management in a blockchain network, and more particularly, to a method and a computer program for recovering a cryptocurrency determined to be permanently lost.

Cryptocurrency that is distributed in the blockchain network is stored in various types of wallets. It is often stored in a wallet supported by an exchange or traded, but it can also be stored in a wallet installed as an app on a mobile device, and can be simply connected to a computer's hard disk or USB external storage device or USB port. It is also possible to store in a hardware wallet. In the most primitive way, private and public keys can be printed or written down on paper.

However, unlike an exchange wallet, a hardware wallet or a paper wallet becomes impossible to withdraw cryptocurrency when lost or damaged. That is, the cryptocurrency is permanently lost and there is no way to find it.

On the other hand, there is a crime that hacks cryptocurrency exchanges of blockchain networks, transfers a large amount of cryptocurrencies to a specific address, and then washes them through several addresses and then attempts to cash them. If you can not fully cash in many cases. In this case, the cryptocurrency of the address will be held for a long time without cashing.

As such, cryptocurrencies that are retained only at a specific address for a long time and cannot be fetched are the same as those lost in the entire blockchain network.

For example, about 20% of Bitcoin is estimated to be permanently lost and cannot be distributed. There are 21 million Bitcoins issued from the beginning, and since Bitcoin began mining, 16.8 million have been mined and 3.8 million have been lost.

First-generation cryptocurrency is not possible to issue additional randomly because the total issuance amount is determined when designing blockchain network. This is a result of the property of the blockchain network that is processed only by agreement of participating nodes without a centrally controlled server.

Complementary second-generation cryptocurrencies also take the form of continuously issuing new cryptocurrencies in order to maintain a 'market-capable amount' when designing blockchain networks. However, cryptocurrency, which was created to solve the problems arising from the centralization of control, that is, the issue and arbitration of money, is incurred by Zimbabwe and Venezuela. You might be stuck in a problem.

Loss of cryptocurrency plays a role to greatly reduce the total amount of cryptocurrency that can be circulated, and it may be in a very difficult situation because it is difficult to issue additional as much as it is lost and may cause another problem even if additional issuance is possible. Cryptocurrency issued on the blockchain network should be actively distributed, because if the distribution becomes difficult, the market may be distorted or disregarded by consumers. Over time, the loss of a cryptocurrency may increase, which may end its lifespan.

Korea Patent Office Patent Application No. 10-2016-0092596, "Virtual Money Management Method and Apparatus for It"

The present invention is to solve the problem of the loss of cryptocurrency, the total circulation of cryptocurrency by recovering the permanently lost cryptocurrency to the Genesis address of the foundation address and to distribute to the nodes in exchange for mining or maintaining the blockchain network It is not intended to reduce this excessively, and to prevent the shortening of the life of the cryptocurrency due to the decrease in the circulation volume of the cryptocurrency.

In order to achieve the above object, according to an embodiment of the present invention, a method for recovering a lost cryptocurrency by a node that is connected to a blockchain network and generates a block for recording a transaction on the blockchain network, includes the blockchain. A search step of finding a lost processing target address for which a withdrawal transaction has not occurred during the predetermined period for a transaction of a block generated before the predetermined period when generating a block immediately after a predetermined period has elapsed from the initial block generation point of the network; ; An agreement step of determining that the cryptocurrency balance held by the found loss processing target address is permanently lost according to agreement of nodes constituting the blockchain network; And a recovery step of executing a transaction for transferring the cryptocurrency balance determined to be permanently lost from the address to the foundation address, and generating and storing the transaction as a block.

The searching step includes the steps of estimating an address for which the remaining balance and the current remaining balance are the same as the lost processing target address before the predetermined period; And inquiring whether a withdrawal transaction exists for the predetermined period of time with respect to the address estimated as the lost processing target address, and determining an address having no withdrawal transaction as the lost processing target address.

In the consensus step, in the case of an address in which only less than a certain percentage of the nodes constituting the blockchain network agree to the recovery, the address may be marked as not permanently lost and may be terminated without executing the recovery step.

According to another embodiment of the present invention, a method for recovering a lost cryptocurrency by a node connected to a blockchain network and generating a block for recording a transaction on the blockchain network may include: A smart contract recording step of recording a smart contract for retrieving the cryptocurrency balance of the address which has not been withdrawn during the period of time to the foundation address; A block searching step of searching for blocks created before the predetermined period as a predetermined period elapses from the time of generating the first block of the blockchain network; Smart contract execution step of executing the smart contract of all the transactions recorded in the searched block.

The block searching step may include deriving an agreement of nodes constituting the blockchain network as to whether the found block is generated before the predetermined period of time.

The smart contract estimates an address having the same balance as the remaining balance before the predetermined period and the current retained balance as the lost processing target address, and withdraws the money for the address estimated as the lost processing target address during the predetermined period. Investigate whether a transaction exists and confirm that the address without a withdrawal transaction is a lost address, and the cryptocurrency balance held by the discovered lost address is permanently lost according to the agreement of the nodes constituting the blockchain network. Determine, and transfer the cryptocurrency balance determined to be permanently lost from the address to the foundation address.

According to the present invention, it is possible to provide a method for recovering lost cryptocurrency that can maintain a cryptocurrency ecosystem by allowing the cryptocurrency that is permanently lost and not distributed on the blockchain network to be distributed again.

In addition, the lost cryptocurrency can be distributed to the nodes so that the nodes have a suitable compensation system for maintaining the blockchain network. In addition, since there is no new issue of cryptocurrency, there is an effect that can prevent problems such as inflation, which is a problem of existing currencies.

1 is a diagram illustrating a transaction process of a blockchain network.
2 is a view for explaining the configuration of a blockchain network.
3 is a view for explaining a technique for recovering a cryptocurrency that is permanently lost and not distributed according to the present invention.
4 is a flowchart illustrating a method of recovering a lost cryptocurrency in a blockchain network according to an embodiment of the present invention.
4 is a flowchart illustrating a method of searching for a target address to be permanently lost according to an embodiment of the present invention.

Terms used herein will be briefly described and the present invention will be described in detail.

The terms used in the present invention have been selected as widely used general terms as possible in consideration of the functions in the present invention, but this may vary according to the intention or precedent of the person skilled in the art, the emergence of new technologies and the like. In addition, in certain cases, there is also a term arbitrarily selected by the applicant, in which case the meaning will be described in detail in the description of the invention. Therefore, the terms used in the present invention should be defined based on the meanings of the terms and the contents throughout the present invention, rather than the names of the simple terms.

When any part of the specification is to "include" any component, this means that it may further include other components, except to exclude other components unless otherwise stated. In addition, the terms "... means", "... unit", "module", etc. described in the specification mean a unit for processing at least one function or operation, which may be implemented in hardware or software, or hardware and software. It can be implemented as a combination of.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

1 is a diagram illustrating a transaction process of a blockchain network.

Blockchain is also called a public transaction book with decentralized data storage technology that stores data in blocks, connects them in a chain form, and replicates and stores them on many computers at the same time. This is because the transaction history is sent to all users who participate in the transaction without keeping transaction records on a centralized server, and every transaction participant cannot share information and contrast and forge or alter data.

Referring to FIG. 1, if there is a transaction of A and B, a corresponding transaction block is generated and transmitted to all the participants in the network. As a result, information mutual verification of the block is completed and joined to the chain. If a cryptocurrency blockchain has a cryptocurrency remittance transaction between A and B, the transfer details including the cryptographic address and the transfer amount of the trading parties will also be recorded in the block.

2 is a view for explaining the configuration of a blockchain network.

Referring to FIG. 2, the blockchain network 20 maintains and manages a network of individual servers participating in a transaction without storing or managing transaction records in a centralized server. This individual server, or participant, is referred to as node 21.

Because there is no central administrator, the role of the node distributing the block is important, and more than half of the participating nodes must have consent to create a new block. The nodes store the transaction details, that is, the blockchain 22 in which the transactions 23 are recorded, on the computer. Even though some nodes have been hacked, the data remains in the plurality of nodes even if the existing contents are changed. Can be.

3 is a view for explaining a technique for recovering a cryptocurrency that is permanently lost and not distributed according to the present invention.

3 conceptually illustrates blocks connected to the blockchain 30 and transaction data recorded in each block as time passes after the first block # 0 is generated in the blockchain network. Specifically, the cryptocurrency balance held by address 0, which is the foundation address (initial address), and arbitrary addresses (addresses A to E) is shown in chronological order from the time of the first block # 0 generation.

According to the present invention, each node of the blockchain network performs a task of finding and recovering lost cryptocurrency when generating a new block from a point in time after a predetermined period has elapsed since the first block (# 0) is made, but the blockchain It can be processed after agreement of nodes participating in the network. For example, it is possible to determine whether to handle loss of cryptographic addresses associated with blocks created more than 30 years ago. Hereinafter, 30 years will be described as a reference period for the recovery operation. However, this period may be set to another predetermined period or a predetermined generated block according to an embodiment.

Each node collects a few blocks when transactions occur in the blockchain network, creates new blocks, connects them to the blockchain, and saves them.Thirty years after the first block (# 0) is created, 30 years ago. It searches for the lost target address for the deleted block. Searching for an address to be lost is a process of determining that it is a permanent lost address that can no longer be withdrawn, and in this process, a recovery operation for the balance of the address determined to be a permanent lost address is performed. One or more transactions generated by the retrieval operation and arbitrary transactions on the blockchain network at the present time are collected to generate a block at the present time.

Referring to FIG. 3, when the block # 30001 is generated, a comparative analysis operation is performed on the block # 1 generated 30 years ago, and when the block # 30002 is generated, 30 years from the corresponding time point. Perform comparative analysis on the previously created block (# 2) .When creating block (# 30003), perform comparative comparison analysis on the block (# 3) created 30 years before that point. When a block # 300004 is generated, a permanent compare address is searched by performing a comparative comparison analysis operation on the block # 4 generated 30 years before that point.

For example, when generating block # 30003, a search is made for a cryptocurrency address for which the balance of the block # 3 is the same as the balance of 30 years ago and for which no withdrawal transaction has occurred. If it is found that the cryptocurrency balance of Address B is equal to 1.0 EA at the time of block (# 3) creation and the current block (# 30003) creation, and no withdrawal transaction has occurred in 30 years, Address B is processed for loss. The target is confirmed, and after the agreement of the nodes, the recovery process for the permanent lost address is performed.

For retrieval processing, a transaction will occur in which all cryptocurrency balances of address B are transferred to address 0, which is the foundation address, and the remittance transaction will be recorded in the newly created block (# 30003). It will be 1.0EA and the balance at Address B will be 0.0EA.

When creating block # 30004, look for a cryptocurrency address that has the same balance as before 30 years and no withdrawal transaction for 30 years for the transaction of block # 4. If block (# 4) is created and the balance of cryptocurrency at the current address C is equal to 0,5 EA, and it is confirmed that no withdrawal transaction has occurred in 30 years, address C is confirmed as lost and After agreement, a recovery process for the permanent lost address is performed.

For the recovery process, a transaction will be sent to all the cryptocurrency balances of the corresponding address C to address 0, which is the foundation address, and the remittance transaction will be recorded in the newly created block (# 30004). It can be seen that 1.5EA was reached and the balance at Address C was 0.0EA (31).

4 is a flowchart illustrating a method for recovering lost cryptocurrency in a blockchain network according to an embodiment of the present invention, and is performed every time a block is generated immediately after a predetermined period of time from the initial block generation time of the blockchain network. These are the steps. For example, 30 years after the creation of the first block of the blockchain network, the block is created by additionally performing the following process from the time of creating a new block.

Step S41 is a search step of the lost processing target address. For a transaction of a block created before the predetermined period, a cryptocurrency address for which a withdrawal transaction has not occurred during the period is found and determined as a lost processing target address. For example, an account that has never been withdrawn for 30 years is searched for as a permanent loss. There is a 30 year difference between the past block and the current block being compared.

In one embodiment, two steps may be required to search for a lost processing target address. The first step is to estimate an address whose loss balance is the same as the balance held before the predetermined period as the lost processing address, and whether there is a withdrawal transaction for a predetermined period of time for the address estimated as the lost processing target address. The second step is to confirm that the address that has no withdrawal transaction as the address to be processed is lost.

On a 30-year basis, check the deposit and withdrawal addresses for all transactions included in the blocks created 30 years ago to verify that no withdrawals have been made for 30 years. To check whether there has been no withdrawal for 30 years, there may be a method of analyzing all 30 years of the blocks on the blockchain network, but this whole survey is a burden on the system due to the large amount of computation. Therefore, the first step is to compare the balance between 30 years ago and the current balance, to select the detailed inquiry target, and to inquire whether there is no withdrawal from the account.

Step S42 is an agreement step of determining that the cryptocurrency balance held by the lost processing target address is permanently lost according to the agreement of the nodes constituting the blockchain network. In order to recover the cryptocurrency balance of the address determined to be lost, agreement between nodes is required.

Consensus between nodes may be performed according to an algorithm defined according to the type of blockchain network. In the blockchain network, a separate server is not involved, and when a block is created 30 years after each node is first programmed and operated, all transactions of blocks 30 years ago are examined, and for each withdrawal address and deposit address, respectively. After verifying that no funds have been withdrawn for 30 years, transfer the entire balance of the lost account to the Foundation's Genesis address. If the buyer of the cryptocurrency agrees to deal with such loss from the outset, there will be no problem in implementation, and it will be impossible to hack because the recovery is made through agreement between nodes without a separate central server.

In the case of consensus failure between nodes in the consensus stage, that is, the address of which only less than a certain percentage (e.g., 50%) nodes among the nodes constituting the blockchain agree to reclaim is marked as permanent loss and the retrieval stage Exit without running.

Step S43 is a recovery step of transferring the balance of the address to be permanently lost to the foundation address, executing a transaction for transferring the cryptocurrency balance determined to be permanently lost from the address to the foundation address, and generating and storing the transaction as a block. do. In this way, forever lost cryptocurrency can be recovered to the foundation address to maintain the total amount of money circulating on the blockchain network.

5 is a flowchart illustrating a method of searching for a target address to be permanently lost according to an embodiment of the present invention.

In step S50, the next address to be analyzed whether or not it is a loss processing object is acquired. All cryptocurrency addresses recorded as deposit or withdrawal addresses are sequentially obtained for all transactions recorded in the blocks created before the predetermined period, and the inspection is performed.

In step S51, the balance before the predetermined period and the current balance are compared with respect to the cryptocurrency address selected for inspection.

In step S52, if the balances at both time points are the same, the process proceeds to step S53 to estimate the corresponding address as a lost processing target address, and if not, proceeds to step S50 to obtain the next address to be analyzed.

In step S54, it is checked whether there is a withdrawal transaction for a predetermined period with respect to the cryptocurrency address estimated as the lost processing target address. To this end, it is necessary to search all the blocks for a predetermined period. If at least one withdrawal transaction is present, it is not a lost processing target address, so the process proceeds to step S50 without a collection process to obtain the next address to be analyzed.

If it is determined in step S55 that no withdrawal transaction has been made during the period, the flow advances to step S56 to confirm the address as a loss processing target address and to transfer it to the recovery procedure.

According to an embodiment, each node of the blockchain network records a smart contract for retrieving the cryptocurrency balance of an address that has not been withdrawn for a predetermined period to a foundation address in every transaction recorded in the block, After a predetermined period has elapsed since the initial block generation time, the block created before the predetermined period is searched and a smart contract instructing the recovery of all transactions recorded in the searched block is executed to recover all the balances of the lost address. Can be.

For example, if a smart contract is recorded in every transaction that occurs in the blockchain network so that "if no balance has been withdrawn from any address for 30 years, all the balance of that address is returned to the foundation address", then any node acts as a timer. It will wake up and force a smart contract created a year ago.

Whether a searched block is generated before a predetermined time period according to the block search may be determined as an analysis target block by deriving an agreement of nodes constituting the blockchain network. Therefore, it is possible to prevent the recovery process by designating a block that has just been created by hacking any node as a block that has passed 30 years.

On the other hand, the smart contract for collection instruction to be recorded in all transactions estimates an address whose loss balance is the same as the remaining balance and the current retention balance before a predetermined period, and for the address estimated as the loss target address. It checks whether there is a withdrawal transaction for a certain period of time and confirms the address where there is no withdrawal transaction as the address to be lost, and according to the agreement of the nodes constituting the blockchain network, the balance of the cryptocurrency held by the lost address is permanently lost. And a cryptocurrency balance determined to be permanently lost may be written to execute a transaction for transferring from the corresponding address to the foundation address.

Cryptocurrency recovered from an address identified as permanently lost can be distributed to the nodes in exchange for mining.

Method according to an embodiment of the present invention is implemented in the form of program instructions that can be executed by various computer means may be recorded on a computer readable medium. The computer readable medium may include program instructions, data files, data structures, etc. alone or in combination. Program instructions recorded on the media may be those specially designed and constructed for the purposes of the present invention, or they may be of the kind well-known and available to those having skill in the computer software arts. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tape, optical media such as CD-ROMs, DVDs, and magnetic disks, such as floppy disks. Magneto-optical media, and hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like. Examples of program instructions include not only machine code generated by a compiler, but also high-level language code that can be executed by a computer using an interpreter or the like.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

Claims (7)

A method for recovering a lost cryptocurrency by a node connected to a blockchain network and generating a block for recording a transaction on the blockchain network,
When a block is generated immediately after a predetermined period elapses from the initial block generation time of the blockchain network, a search for a lost processing target address for which a withdrawal transaction has not occurred during the predetermined period is performed for a transaction of a block created before the predetermined period. A search step;
An agreement step of determining that the cryptocurrency balance held by the found loss processing target address is permanently lost according to agreement of nodes constituting the blockchain network;
And a recovery step of executing a transaction for transferring the cryptocurrency balance determined to be permanently lost from the address to the foundation address, and generating and storing the transaction as a block.
The nodes replicate and store the block in which the withdrawal transaction is recorded;
The search for the lost processing target address for which the withdrawal transaction has not occurred is performed through the inter-block comparison of the nodes, but is performed for the nodes of the detailed inquiry target selected based on the agreement of the nodes.
Transfer the permanently lost cryptocurrency without the existence of the withdrawal transaction from the block elapsed to the current block to the foundation address when the next block is generated,
Cryptocurrency that can not be withdrawn due to a lost or damaged wallet (Wallet) is included in the permanently lost cryptocurrency, a method for recovering a lost cryptocurrency in a blockchain network. The method of claim 1,
The search step,
Estimating an address whose loss balance is the same as the remaining balance before the predetermined period and the current retention balance as an address to be lost;
Determining whether the withdrawal transaction exists during the predetermined period of time with respect to the address estimated as the lost processing target address, and determining an address having no withdrawal transaction as the lost processing target address; How to recover lost cryptocurrencies from your network. The method of claim 1,
In the consensus step, in the case of an address where only less than a certain percentage of nodes constituting the blockchain network agree to the recovery, the address is marked as not permanently lost and ends without executing the recovery step. , How to recover lost cryptocurrency from blockchain network. A method for recovering a lost cryptocurrency by a node connected to a blockchain network and generating a block for recording a transaction on the blockchain network,
A smart contract recording step of recording a smart contract for retrieving the cryptocurrency balance of an address which has not been withdrawn for a predetermined period in all transactions recorded on the blockchain network to a foundation address;
A block searching step of searching for blocks created before the predetermined period as a predetermined period elapses from the time of generating the first block of the blockchain network;
A smart contract execution step of executing the smart contract of all transactions recorded in the found block;
The nodes replicate and store the block where the withdrawal transaction is recorded,
The search for the lost processing target address in which the withdrawal transaction has not occurred is made through the inter-block comparison of the nodes, but is performed on the nodes of the detailed inquiry target selected based on the agreement of the nodes.
From the block which has passed the predetermined time period to the block currently generated, the permanently lost cryptocurrency without the existence of a withdrawal transaction is transferred to the foundation address when the next block is generated.
Cryptocurrency that can not be withdrawn due to a lost or damaged wallet (Wallet) is included in the permanently lost cryptocurrency, a method for recovering a lost cryptocurrency in a blockchain network. The method of claim 4, wherein
The block search step,
And deriving a consensus of the nodes constituting the blockchain network as to whether the searched block is generated before the predetermined period of time. The method of claim 4, wherein
The smart contract,
Presuming that the same address as the remaining balance and the current remaining balance at the time before the predetermined period is the lost address;
Inquiring whether a withdrawal transaction exists for the predetermined period of time with respect to the address estimated as the lost processing target address, and confirming an address having no withdrawal transaction as the lost processing target address,
In accordance with the agreement of the nodes constituting the blockchain network, it is determined that the cryptocurrency balance held by the found loss address is permanently lost.
And executing a transaction for transferring the cryptocurrency balance determined to be permanently lost from the address to the foundation address. A computer program recorded on a recording medium for carrying out a method for recovering a lost cryptocurrency in the blockchain network of any one of claims 1 to 6.

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