WO2020060094A1

WO2020060094A1 - Node device constituting blockchain network and method for operation of node device

Info

Publication number: WO2020060094A1
Application number: PCT/KR2019/011647
Authority: WO
Inventors: 김성완; 이형택
Original assignee: 김성완; 이형택
Priority date: 2018-09-21
Filing date: 2019-09-09
Publication date: 2020-03-26
Also published as: KR101984254B1

Abstract

Disclosed are: a node device constituting a blockchain network, whereby security can be strengthened by preventing each user from directly possessing his/her private key, and a link to a wide variety of blockchain-based electronic currencies can be provided as well; and a method for operation of the node device. A node device of a first blockchain network comprising a plurality of node devices, according to an aspect, comprises: a communication circuit for communicating with a client apparatus and other node devices; at least one processor; and a memory in which an instruction executable by the at least one processor is stored, wherein the at least one processor: generates, at the request of the client apparatus, a first private key, a first public key, and a first wallet address to be used in the first blockchain network by a user using the client apparatus; stores the first public key and the first wallet address in a public block of a public blockchain; stores the first private key in a nonpublic block of a nonpublic blockchain, and generates a first random encryption key to encrypt the nonpublic block in which the first private key is stored; divides the first random encryption key into a predetermined number of parts, and stores the division pieces in other node devices such that the pieces are distributed among the node devices; and receives the division pieces from the node devices when the user's transaction takes place, and then decrypts the first private key in the encrypted nonpublic block on the basis of the received pieces to use the first private key.

Description

A node device constituting a blockchain network and a method of operating the node device

The present invention relates to a blockchain technology, and more specifically, to prevent a user from owning a private key, and further comprising a node device and a node device constituting a blockchain network capable of interworking with various types of electronic money based on the blockchain. It relates to a method of operation.

Generally, electronic money is a digital currency that exists virtually on the Internet. Bitcoin, a typical electronic money among such electronic money, has a structure in which there is no central device for issuing and managing currency, and the transaction of Bitcoin is based on a blockchain.

Blockchain is a non-falsifiable distributed storage created and managed by a peer-to-peer (P2P) network. Blockchain means a collection of data blocks created by transactions (indivisible unit work between two parties) in a chain. Once recorded, data cannot be forged or tampered with. In the blockchain, the confirmed transaction history generated between users for a certain period of time can be stored. Many of the nodes that make up the blockchain network each have a copy of the blockchain, and transaction details can be made public.

As such, the electronic money based on the blockchain is transacted based on the public key cryptography. Users who have electronic money have their wallet address, and when sending or making a transaction, they sign with a private key to generate a transaction. Therefore, the user should keep his private key well, so that the user has a lot of difficulty in managing the private key personally and is exposed to the risk of hacking.

In addition, the types of electronic money are diversified, and interworking between different types of electronic money is not well performed, and in order to use various types of electronic money, there is a hassle of using a dedicated client of each electronic money.

The present invention has been proposed to solve the above-mentioned problems, and it is possible to enhance security while not allowing users to directly own their own private key, and also construct a blockchain network that can interwork with various types of electronic money based on blockchain. An object of the present invention is to provide a node device and a method of operating the node device.

A node device of a first blockchain network composed of a plurality of node devices according to an aspect includes: a communication circuit communicating with a client device and other node devices; One or more processors; And a memory for storing instructions executable by the one or more processors, wherein the one or more processors are first used by a user using the client device in the first blockchain network at the request of the client device. Generate a private key, a first public key and a first wallet address, store the first public key and the first wallet address in a public block of a public blockchain, and store the first private key in a private block of a private blockchain After storing the data, the first random encryption key is generated to encrypt the private block in which the first private key is stored, and the first random encryption key is divided into a predetermined number to distribute the divided pieces to other node devices and to store them. When the user's transaction occurs, the divided pieces are received from other node devices and based on this. By decrypting and using the first private key from the encrypted private block.

The transaction is a transfer of a first kind of coin commonly used in the first blockchain network from the user to another user, wherein the one or more processors sign the transaction with the first private key and transmit it to another node device It is possible to verify with the first public key, and upon verification completion, the corresponding transaction can be stored in the public block of the public blockchain.

The communication circuit further communicates with a second blockchain network, and the one or more processors make a wallet creation request to the second blockchain network upon receiving a wallet creation request for use in the second blockchain network from the client device. Transmit, receive the second private key, the second public key and the second wallet address generated in the second blockchain network from the second blockchain network according to the wallet creation request, the second public key and the Store the second wallet address in the public block of the public blockchain, store the second private key in the private block of the private blockchain, and generate a second random encryption key to encrypt the private block in which the second private key is stored The second random encryption key is divided into a predetermined number, and the fragments are distributed to other node devices and stored. When the transaction to be transmitted to the second blockchain network of the user occurs, the divided pieces of the second random encryption key are received from other node devices, and based on this, the second private key is stored and encrypted from the encrypted private block. The second private key can be decrypted and used.

The transaction to be transmitted to the second blockchain network is a remittance of a second kind of coin commonly used in the second blockchain network from the user to another user, and the one or more processors are to be transmitted to the second blockchain network When a transaction is signed with the second private key and transmitted to the second blockchain network, and a processing response is received, the transaction can be stored in the public block of the public blockchain.

The one or more processors, upon request of the client device, may check the balance of the second kind of coin of the user in the public block of the public blockchain and provide it to the client device.

The transaction to be transmitted to the second blockchain network is a second kind of coin commonly used in the second blockchain network as a remittance from the user to another user as a first kind of coin commonly used in the first blockchain network. As a money transfer to be exchanged, the one or more processors, after changing the wallet address of the other user recorded in the transaction to be transmitted to the second blockchain network, to the second kind of coin operated wallet address of the first blockchain network The second private key is signed and transmitted to the second blockchain network, and upon receiving a processing response, the transaction is stored in the public block of the public blockchain, and the first kind of the first blockchain network The second kind of coin from the coin operated wallet address to the first wallet address of the other user A transaction in which the first kind of coin corresponding to the amount of money is transferred can be stored in the public block of the public blockchain.

The plurality of node devices includes a plurality of representative node devices and a plurality of general node devices, and the plurality of representative node devices generate blocks by synchronizing proof of ownership to synchronize blocks, and the general node device is a block of representative node devices. And store them in synchronization, and the node device of the first blockchain network may be a representative node device.

In a first blockchain network composed of a plurality of node devices according to another aspect, a method of operating a node device in a first blockchain network is a user who uses the client device in response to a request of a client device connected through a communication network within the first blockchain network. Generating a first private key, a first public key, and a first wallet address to be used in; Storing the first public key and the first wallet address in a public block of a public blockchain; Storing the first private key in a private block of the private blockchain and generating a first random encryption key to encrypt the private block in which the first private key is stored; Dividing the first random encryption key into a predetermined number and distributing and storing the divided pieces to other node devices; And when the user's transaction occurs, receiving the divided pieces from other node devices and decrypting and using the first private key from the encrypted private block based on this.

The transaction is a transfer of a first kind of coin commonly used in the first blockchain network from the user to another user, wherein the step of using is signing the transaction with the first private key and transmitting it to another node device. It may include the step of allowing verification with the first public key, and storing the transaction in the public block of the public blockchain upon verification completion.

The operation method may include transmitting a wallet creation request to the second blockchain network upon receiving a wallet creation request for use in the second blockchain network from the client device; Receiving a second private key, a second public key, and a second wallet address generated in the second blockchain network from the second blockchain network according to the wallet creation request; Storing the second public key and the second wallet address in a public block of a public blockchain; Storing the second private key in a private block of the private blockchain and generating a second random encryption key to encrypt the private block in which the second private key is stored; Dividing the second random encryption key into a predetermined number and distributing and storing the divided pieces to other node devices; And when the transaction to be transmitted to the second blockchain network of the user occurs, receiving the fragment pieces of the second random encryption key from other node devices and based on this, the second private key is stored and encrypted from the encrypted private block. 2 It may further include the step of decrypting and using the private key.

The transaction to be transmitted to the second blockchain network is a remittance of a second kind of coin commonly used in the second blockchain network from the user to another user. The step of decrypting and using the second private key includes: 2 Signing the transaction to be sent to the blockchain network with the second private key, transmitting it to the second blockchain network, and receiving the processing response, storing the transaction in the public block of the public blockchain. have.

The operation method may further include the step of confirming the balance of the second kind of coin of the user in the public block of the public blockchain to the client device at the request of the client device.

The transaction to be transmitted to the second blockchain network is a second kind of coin commonly used in the second blockchain network as a remittance from the user to another user as a first kind of coin commonly used in the first blockchain network. The transfer of money exchanged, and the step of decrypting and using the second private key is to operate the second kind of coin in the first blockchain network by using the wallet address of the other user recorded in the transaction to be transmitted to the second blockchain network. After changing to a wallet address, signing with the second private key, transmitting it to the second blockchain network, and storing a corresponding transaction in a public block of the public blockchain when receiving a response to the processing; And a transaction in which a first kind of coin corresponding to the amount of the second kind of coin is transferred from the address of the first kind of coin operation wallet of the first blockchain network to the first wallet address of the other user. It may include the step of storing in the public block.

The plurality of node devices includes a plurality of representative node devices and a plurality of general node devices, and the plurality of representative node devices generate blocks by synchronizing proof of ownership to synchronize blocks, and the general node device is a block of representative node devices. The node devices performing synchronization and storing the same may be representative node devices.

The present invention operates by dividing the blockchain into a private blockchain and a public blockchain, and stores the user's private key in a private block of the private blockchain, thereby blocking external exposure of the private key to enhance security.

In addition, the present invention encrypts a private block storing a private key with a random encryption key, then distributes the random encryption key to node devices constituting a blockchain network and stores the random encryption key only under the approval of the node devices. Collects them so that the private key can be decrypted, thereby preventing hacking of the private key and enhancing security.

In addition, the present invention can increase the convenience of the user and increase the utilization of the electronic money by allowing various types of electronic money to be used in one blockchain network.

1 is a view showing a system according to an embodiment of the present invention.

FIG. 2 is a block diagram of a representative node of FIG. 1.

FIG. 3 is a flow chart illustrating the innocoin subscription procedure and the innocoin wallet creation procedure in the system of FIG. 1.

FIG. 4 is a flowchart illustrating a procedure for creating a Bitcoin wallet through the Innocoin blockchain network in the system of FIG. 1.

FIG. 5 is a flowchart illustrating a procedure for sending Incoin within the Innocoin blockchain network in the system of FIG. 1.

FIG. 6 is a flowchart illustrating a procedure for sending bitcoin through the Innocoin blockchain network in the system of FIG. 1.

FIG. 7 is a flowchart illustrating a procedure for converting and transferring Bitcoin to Innocoin through the Innocoin blockchain network in the system of FIG. 1.

The network 130 returns the result to the representative node 121 of the Innocoin blockchain network 120 (S705).

The representative node 121 of the Innocoin blockchain network 120 records the corresponding bitcoin transfer transaction in the public block of the public blockchain (S706). Therefore, in the public blockchain, the bitcoin balance of the sender is deducted by the amount of the bitcoin that was transferred, and, conversely, the balance of the Incoin's bitcoin-operated wallet address is increased by the corresponding bitcoin. When the sender, that is, the user checks the balance of his / her own Bitcoin, without having to access and check the Bitcoin blockchain network 130, the Innocoin blockchain network 120 can directly inform the user of the Bitcoin balance. have.

On the other hand, the representative node 121 checks the exchange rate between Bitcoin and Innocoin (S707). The exchange rate can be checked on a separate server, or information stored by itself can be used. The representative node 121 stores in a public block a transaction for remitting the Innocoin corresponding to the transferred bitcoin to the Innocoin wallet address of the original recipient according to the exchange rate (S708). Therefore, the balance of the Innocoin-operated wallet address serving as a key currency decreases, and the Innocoin balance of the recipient's Incoin wallet address increases.

In the embodiment of FIG. 7, storing data in a block means creating a block by proof of stake between representative nodes 121 in the Innocoin blockchain network 120, and is understood in the following claims as well Should be.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and variations without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical spirit of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the claims below, and all technical spirits within the scope equivalent thereto should be interpreted as being included in the scope of the present invention. The method of the present invention as described above may be implemented as a program and stored in a computer readable form on a recording medium (CD-ROM, RAM, ROM, floppy disk, hard disk, magneto-optical disk, etc.). Such a process will not be described in detail any more as those skilled in the art to which the present invention pertains can easily carry out.

Claims

In the node device of the first blockchain network consisting of a plurality of node devices,

A communication circuit in communication with the client device and other node devices;

One or more processors; And

And a memory for storing instructions executable by the one or more processors,

The one or more processors,

At the request of the client device, a user using the client device generates a first private key, a first public key and a first wallet address to be used in the first blockchain network,

Store the first public key and the first wallet address in a public block of a public blockchain,

After storing the first private key in a private block of the private blockchain, a first random encryption key is generated to encrypt the private block in which the first private key is stored,

The first random encryption key is divided into a predetermined number to distribute the fragments to other node devices, and when the user's transaction occurs, the fragments are received from other node devices and based on the encrypted fragments. Decrypt and use the first private key from the block,

The communication circuit further communicates with the second blockchain network,

The one or more processors,

Upon receiving a wallet creation request for use in the second blockchain network from the client device, transmits a wallet creation request to the second blockchain network,

In response to the wallet creation request, the second private key, the second public key and the second wallet address generated in the second blockchain network are received from the second blockchain network,

Store the second public key and the second wallet address in a public block of a public blockchain,

After storing the second private key in a private block of the private blockchain, a second random encryption key is generated to encrypt the private block in which the second private key is stored,

The second random encryption key is divided into a predetermined number to distribute the fragmented pieces to other node devices, and when the transaction to be transmitted to the second blockchain network of the user occurs, the second random encryption key from other node devices After receiving the divided pieces of the second private key is stored on the basis of this, the second private key is decrypted and used from the encrypted private block,

The transaction to be transmitted to the second blockchain network is a second kind of coin commonly used in the second blockchain network as a remittance from the user to another user as a first kind of coin commonly used in the first blockchain network. As a remittance to be exchanged,

The one or more processors,

Change the wallet address of the other user recorded in the transaction to be sent to the second blockchain network to the second type coin operated wallet address of the first blockchain network, and then sign the second private key to sign the second blockchain When it is sent to the network, and receives a processing response, it stores the transaction in the public block of the public blockchain,

In addition, a block in which the first kind of coin corresponding to the amount of the second kind of coin is transferred from the address of the first kind of coin operation wallet of the first blockchain network to the first wallet address of the other user is disclosed. Node device characterized in that it is stored in the public block of the chain.
According to claim 1,

The user's transaction is the transfer of a first kind of coin commonly used in the first blockchain network from the user to another user,

The one or more processors,

A node device characterized in that the user's transaction is signed with the first private key and transmitted to another node device for verification with the first public key, and when the verification is completed, the transaction is stored in a public block of the public blockchain. .
According to claim 1,

The transaction to be transmitted to the second blockchain network includes remittance of a second kind of coin commonly used in the second blockchain network from the user to another user,

The one or more processors,

When the transaction to be transmitted to the second blockchain network, which is the remittance of the second kind of coin, is signed with the second private key and transmitted to the second blockchain network, and when a processing response is received, the transaction is sent to the public blockchain. Node device characterized in that it is stored in the public block.
The method of claim 3,

The one or more processors,

A node device, characterized in that, upon request of the client device, the balance of the second kind of coin of the user is checked in a public block of a public blockchain and provided to the client device.
According to claim 1,

The plurality of node devices includes a plurality of representative node devices and a plurality of general node devices, and the plurality of representative node devices generate blocks by synchronizing proof of ownership to synchronize blocks, and the general node device is a block of representative node devices. Save them in sync,

The node device of the first blockchain network is a representative node device.
A method for operating a node device in a first blockchain network composed of a plurality of node devices,

Generating a first private key, a first public key, and a first wallet address to be used in the first blockchain network by a user using the client device according to a request of a client device connected through a communication network;

Storing the first public key and the first wallet address in a public block of a public blockchain;

Storing the first private key in a private block of the private blockchain and generating a first random encryption key to encrypt the private block in which the first private key is stored;

Dividing the first random encryption key into a predetermined number and distributing and storing the divided pieces to other node devices;

Decrypting and using the first private key from the encrypted private block based on the received fragments from other node devices when the user's transaction occurs;

Transmitting a wallet creation request to the second blockchain network upon receiving a wallet creation request to be used in the second blockchain network from the client device;

Receiving a second private key, a second public key, and a second wallet address generated in the second blockchain network from the second blockchain network according to the wallet creation request;

Storing the second public key and the second wallet address in a public block of a public blockchain;

Storing the second private key in a private block of the private blockchain and generating a second random encryption key to encrypt the private block in which the second private key is stored;

Dividing the second random encryption key into a predetermined number and distributing and storing the divided pieces to other node devices; And

When a transaction to be transmitted to the second blockchain network of the user occurs, the second pieces of the second encryption key are received from other node devices, and based on this, the second private key is stored and encrypted from the encrypted private block. Decrypting and using the private key,

The transaction to be transmitted to the second blockchain network is a second kind of coin commonly used in the second blockchain network as a remittance from the user to another user as a first kind of coin commonly used in the first blockchain network. It's a money transfer that you exchange,

Decoding and using the second private key,

Change the wallet address of the other user recorded in the transaction to be sent to the second blockchain network to the second type coin operated wallet address of the first blockchain network, and then sign the second private key to sign the second blockchain Transmitting to a network and storing the corresponding transaction in a public block of a public blockchain upon receiving a response to the process; And

A transaction in which the first kind of coin corresponding to the amount of the second kind of coin is transferred from the address of the first kind of coin operation wallet of the first blockchain network to the first wallet address of the other user of the public blockchain And storing in a public block.
The method of claim 6,

The user's transaction is the transfer of a first kind of coin commonly used in the first blockchain network from the user to another user,

Decoding and using the first private key,

And signing the user's transaction with the first private key and sending it to another node device so that it can be verified with the first public key, and when the verification is completed, storing the transaction in a public block of the public blockchain. How to do it.
The method of claim 6,

The transaction to be transmitted to the second blockchain network includes the remittance of a second kind of coin commonly used in the second blockchain network from the user to another user,

Decoding and using the second private key,

When the transaction to be transmitted to the second blockchain network, which is the remittance of the second kind of coin, is signed with the second private key and transmitted to the second blockchain network, and receiving a processing response thereto, the transaction is released to the public blockchain. And storing in a block.
The method of claim 8,

And at the request of the client device, checking the balance of the second kind of coin in the public block of the public blockchain and providing it to the client device.
The method of claim 6,

The plurality of node devices includes a plurality of representative node devices and a plurality of general node devices, and the plurality of representative node devices generate blocks by synchronizing proof of ownership to synchronize blocks, and the general node device is a block of representative node devices. Save them in sync,

A node device performing the operation method is a representative node device.