KR20200121141A - System and method for selection of block generator using equitable consensus algorithm in blockchain - Google Patents

Abstract

The present invention relates to a system and method for selecting a block producer using the PoA consensus algorithm of a block chain. This block generator selection method is based on a number of nodes that are candidates for block generators in the block generator group of PoA, and basic requirements including deposits, compliance, and contributions of the block generator candidate nodes. Blockchain core that classifies block generator nodes into multiple levels, arranges block generator candidate nodes for each level according to a predetermined sorting criterion, gives identification values, and selects block generators by applying random numbers to block generator candidates at each level It characterized in that it comprises a server.

Description

Block chain block producer election system and method using fair consensus algorithm {SYSTEM AND METHOD FOR SELECTION OF BLOCK GENERATOR USING EQUITABLE CONSENSUS ALGORITHM IN BLOCKCHAIN}

The present invention relates to a method for selecting a block producer of a block chain, and more particularly, to a system and method for selecting a block producer of a block chain using a PoA consensus algorithm.

Blockchain is referred to as a'distributed ledger' (分散元帳, distributed ledger) technology. In other words, it is a technology that distributes and stores and manages the ledger recording transaction details among a large number of people. Specifically, a block chain is a block of data by tying up multiple online transaction records, and after connecting the previous block and the subsequent block like a chain using a hash value, this information It is a technology that distributes storage and management by copying all or part of the P2P method to various computers around the world.

The initial blockchain is the most stable algorithm among the existing consensus algorithm methods, and most of them use the Proof-of-Work method. The proof-of-work method is known as an irrational method in terms of energy consumption. The dPoS (delegated proof-of-stake) method improves transaction speed due to rapid consensus, but is known to violate the spirit of decentralization, and contains security vulnerabilities that can be easily exposed to attacks or hacking due to the small number of block generator nodes. . In addition, PoA (Proof-of-Authority) or PoS (Proof-of-Stake) is a similar case.

In particular, it is known that the consensus algorithm of dPoS (delegated proof-of-stake) or PoA (Proof-of-Authority) method violates complete decentralization or loses the advantage of a single attack point, resulting in weakened security. For example, in EOS dPoS, 21 limited block generators (BG: Block Generators) are responsible for block generation and verification, so consensus on block verification is reached quickly, so that transaction confirmation is fast and the transaction speed is improved accordingly. can do. However, since the authority is concentrated on specific nodes, the possibility of collusion of block producers is high, and security is weakened because it is easy to become an attack target due to a small number of block generator nodes.

In addition, in the case of EOS, it is highly likely that collusion between block producers and between block producers and whale voters as it is continuously ranked and maintained above the block producers, which causes a specific block producer to continuously rank higher. . In addition, ORBS' RPoS (Randomized Proof-of-Stake) consensus algorithm randomly selects block producers in a specific way, but it takes a long time to reach consensus because there is no limit on the number of block generator nodes in the entire network. The transaction confirmation is slow.

In addition, the biased and unequal digital claim rights, that is, the voting system in which the majority of cryptocurrencies are excluded from the supply and consensus process, lowers the voluntary motivation for participation in the existing network and does not provide economic incentives to operate in the network system. It has a structural disadvantage, which threatens the continued possibility of the network system.

In addition, in the existing PoA (Proof-of-Authority) consensus algorithm, since the block creation authority can be concentrated on specific nodes and participation as a new block generation node in an authorized node group is restricted, Can be centralized.

Therefore, the present invention was invented to solve the above problems, while maintaining the fast transaction speed of the blockchain, providing fairness for block rewards, and selecting random block generators for each level using quantum random numbers and random numbers of various generation methods. Provides a block producer election system and method using the fair consensus algorithm of the blockchain that can improve transaction speed by solving security vulnerabilities against a single attack point and enhancing the efficiency of block production and verification of the blockchain by applying it to the method. Is to do.

The configuration according to the first aspect of the present invention to achieve the above object is a block producer election system utilizing a fair consensus algorithm of a block chain, a plurality of nodes that become block producer candidates of the block producer group of PoA, and the above Block generator nodes are classified into a plurality of levels according to the conversion score obtained by converting basic requirements including deposits, compliance, and contributions of block generator candidate nodes into scores, and sorting block generator candidate nodes for each level by a predetermined sorting criterion It is characterized by including a blockchain core server that assigns an identification value and selects a block producer by applying a random number generated by a block producer candidate node of each level. Accordingly, fairness and security of the selection opportunity of block producers can be strengthened, and the problem of collusion between block producers can be solved.

Here, the blockchain core server includes a node information database in which information of block generator nodes is stored, a level classifier that classifies block generator candidates into a plurality of levels based on basic requirements, and a quantum random number submitted by a plurality of block generator candidate nodes. A quantum random number summing unit that calculates the sum of random numbers by summing and performs the remainder operation to exclude block generator candidates having an identification number corresponding to the remaining value by dividing the random sum by the number of block generator candidates to be elected to be selected in advance at each level. Thus, it is preferable to include a block generator determining unit that determines a block generator for each level.

When there is a block generator candidate node to be eliminated at a predetermined level, the level classifier reclassifies the block generator candidate nodes into a plurality of levels by adding to a block generator candidate group having a high conversion score among the preliminary candidates for block generators not belonging to the level. It is desirable.

It is preferable that the level classification unit assigns different weights to each requirement and converts it into a score.

It is effective that the plurality of nodes include a quantum random number generator.

On the other hand, the configuration according to the second aspect of the present invention for achieving the above object is a method for selecting a block producer using a fair consensus algorithm of a block chain, which includes deposits of block producer nodes in the block producer group of PoA, compliance with regulations, and A first step of classifying a block generator node into a plurality of levels according to a converted score obtained by converting a basic requirement item including a contribution degree into a score; A second step of arranging block generator candidate nodes for each level according to a predetermined sorting criterion to give an identification value; A third step of generating and submitting a random number by a predetermined number of block generator candidate nodes designated in each level; A fourth step of calculating a random sum by summing the random number values of the block generator candidate nodes for each level; And a fifth step of selecting a block producer by performing a remainder operation of dividing the random number sum by a preset number of elected persons for each level.

Here, in the fifth step, the remainder operation is performed by dividing the random number of each level by the number of elected people set in advance at a predetermined level, excluding block generator candidate nodes having an identification value corresponding to the remainder, and again as the elected number of people value. It is preferable to repeat the process of dividing the random number and excluding block generator candidate nodes having an identification value corresponding to the remaining value until a preset number of elected members remains.

In the first step, when there is a block generator candidate node to be eliminated at a predetermined level, a block generator preliminary candidate node having a high conversion score among block generator candidates not belonging to the level is added to the block generator candidate group, and the block generator candidate node is selected. It is preferred to include the step of reclassifying into a plurality of levels.

In addition, when selecting a block generator for each of a plurality of levels, it is preferable to set the number of elected members so that the selection probability increases as the level composed of block generator candidates having a high conversion score increases.

On the other hand, the first step of classifying the block generator candidates into a plurality of levels according to the conversion score obtained by converting the basic requirements including the deposit, compliance and contribution of the nodes of the block generator group into scores, is to assign different weights to each of the requirements. It is preferable to include the step of giving and converting it into a score.

According to the block producer election system and method using the block chain's fair consensus algorithm consisting of the above configuration, it is possible to impart fairness for block rewards while maintaining the fast transaction speed of the block chain. In addition, according to the present invention, there is an advantage that it is very fast and efficient to select a block producer or to reach a consensus on block generation and verification. In addition, according to the present invention, any node participating in the blockchain ecosystem can have an opportunity to apply as a block producer.

In addition, according to the present invention, by applying quantum random numbers and random numbers of various generation methods to the method of selecting random block generators by level, security vulnerability to a single attack point is solved, and the efficiency of block production and verification of the block chain is enhanced. It can improve transaction speed.

1 is a block diagram of a block generated by a general block generator node.
2 is a block diagram of a block generator election system using a fair consensus algorithm according to the present invention;
3 is an exemplary table of converting scores of block generator candidates for classifying block generator candidates into levels according to the present invention;
4 is a schematic diagram of classifying block producer candidates into levels for selection of block producers of a block chain using a fair consensus algorithm according to the present invention;
5 is a schematic diagram showing random selection of block producers for each level in order to select block producers of a block chain using a fair consensus algorithm according to the present invention;
6 is a flowchart of a method for selecting a block producer in a block chain using a fair consensus algorithm according to the first embodiment of the present invention;
7 is a flowchart of a method for selecting a block producer in a block chain using a fair consensus algorithm according to a second embodiment of the present invention;
8 is a flowchart of a method of selecting a block generator using a quantum random number when selecting a block generator using a fair consensus algorithm according to the present invention.

Advantages and features of the present invention, and a method of achieving the same will be described through embodiments to be described later in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. However, these embodiments are provided to explain in detail enough to be able to easily implement the technical idea of the present invention to those of ordinary skill in the art.

In the drawings, embodiments of the present invention are not limited to the specific form shown, but are exaggerated for clarity. In addition, parts denoted by the same reference numerals throughout the specification represent the same elements. In the present specification, the expression "and/or" is used as a meaning including at least one of the elements listed before and after. In addition, the singular form includes the plural form unless specifically stated in the text. In addition, components, steps, actions and elements referred to as “comprising” or “comprising” as used in the specification mean the presence or addition of one or more other elements, steps, actions, elements and devices.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In describing the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

The fair consensus algorithm to be implemented in the present invention means an equitable PoA consensus algorithm (equitable Proof-of-Authority).

In the PoA consensus algorithm, a block generator group (Witness Group) consists of up to 39 nodes, and is a group for block generation and verification. The Block Producer Group (Witness Group) has the decision to participate in the new node. As shown in FIG. 1, 23 block generator nodes (2_1 to 2_23) are elected by consensus among 39 members of the block generator group to sequentially generate block groups 10_1 to 10_23. The first round is to generate 23 blocks, and in each round of block generation, each of the 23 final elected block producers (BG) generates 12 blocks each, creating a total of 276 blocks. It ensures transparency and irreversibility verification and block verification for transaction transactions by transparently disclosing the process of block creation and transaction details within the blockchain.

In the present invention, in order to select a block generator by a fairer consensus algorithm by utilizing the PoA consensus algorithm, a level is placed in 39 block generators (block generators, Block Generators) of a block generator group (Witness Group). As a basic requirement for determining the level of the block producer election method, the deposit, compliance, and contribution are considered. Then, randomness using a random number is applied when selecting a block generator for each level.

2 is a block diagram of a block producer election system of a block chain using the PoA consensus algorithm according to the present invention.

As shown in FIG. 2, the block producer election system of the blockchain consists of a blockchain core server 10 and a plurality of block generator candidate nodes 20 that generate quantum random numbers and submit them to the blockchain core server. In accordance with the present invention, components for implementing a method of selecting a block producer using a PoA consensus algorithm were added to the blockchain core server 10, and only components related to the present invention in the blockchain core server 10 of FIG. Indicated.

The blockchain core server 10 classifies the node information database 11 in which information of block generator nodes is stored, and block generator candidates into a plurality of levels (Level 1, Level 2, Level 3..) based on basic requirements. A level classifying unit (12), a quantum random number summing unit (13) that calculates a random number sum (randomA) by summing the quantum random numbers submitted by a plurality of block generator candidate nodes (20), a block generator to be selected in advance set for each level And a block generator determiner 14 that determines a block generator for each level by performing a remainder operation of dividing the random number sum (randomA) by a candidate number. Here, the remaining operation is performed as follows. For example, by dividing the random number sum (randomA) by the number of people elected in advance at a predetermined level, excluding the block generator candidates having an identification value corresponding to the remainder, dividing the random number by the number of people elected -1 again, and By excluding the block producer candidates having the corresponding identification value, dividing the random number by the number of elected persons value -2 again, and performing the remainder operation to exclude the block producer candidates having the identification number corresponding to the remaining value, the number of elected persons The above process is repeated until is left to randomly select a block generator. In this case, a block generator candidate that is not excluded is selected as the final block producer.

The node information database unit 11 stores information on a plurality of nodes that are candidates for block generation. The node information database unit 11 stores various types of information for determining basic requirements, such as deposit information of a block generator candidate node, compliance degree, and contribution degree. In addition, the node information database unit 11 stores data generated inside and outside the blockchain core server 10 and input or output to the blockchain core server 10.

The level classification unit 12 includes a score conversion unit 12a that converts each item of the basic requirements of the block generator candidate into a score, and an identification value assigning unit that arranges the block generator candidates of each level according to a certain criterion and assigns an identification number. Includes (12b).

The level classifying unit 12 cuts in the order of high scores based on the scores converted by the score conversion unit 12a and classifies them into a plurality of levels.

The basic requirements for determining the level of the block producer election method include deposit, compliance and contribution.

Here, among the basic requirements, the deposit is'minimum equity deposit'. There is no reliable measurement method as much as the deposit (token) held by a node for the healthy sustainability of the blockchain network. The more you lose, the greater your responsibility, so you will be cautious in making decisions accordingly.

Among the basic requirements, the degree of compliance can be divided into before and after participation in the quorum of the Witness Group. The degree of compliance before the participation of the Block Producer Group (Witness Group) can be measured by the degree of satisfaction of infrastructure configuration requirements, and the degree of compliance after participation can be measured by the persistence of infrastructure maintenance and the fidelity of the role of block production and verification. In particular, if you are elected as a block producer, you must not produce blocks that can fail block verification by failing to produce blocks due to various problems such as system or network or by producing abnormal blocks. For example, it may not produce a block on its turn to produce, handle a bad transaction, or produce a bad block. A measure of these obligations and responsibilities is compliance. In addition, it is evaluated whether or not the established regulations are fairly observed. On the other hand, among the basic requirements, the level of contribution is based on the trust and reputation of the contribution to the activation of the electronic money system and the sustainability of the platform.

Here, the block generator group (Witness Group) may negotiate and adjust basic requirements according to the situation.

3 shows an exemplary table of score conversion of block generator candidates for classifying block generator candidates into levels. As shown in FIG. 3, the number of cases in which a block is not produced at the turn of production, or an invalid transaction is processed or an invalid block is generated as a compliance degree is accumulated for each year, and a negative score is processed. In addition, the amount of stake is converted as a deposit based on 100 points. And, as a contribution, the reliability of the platform sustainability is scored based on 1000 points.

In addition to the basic requirements, deposit, compliance, and contribution, other items may be added. In addition, the conversion standard for converting the basic requirements by the score conversion unit 12a is preferably set in advance, and may be changed as necessary.

On the other hand, returning to FIG. 2, when classifying the block generator candidates of the block generator candidate group (Witness group) divided into a plurality of levels, the level classification unit 12 assigns different weights to the basic requirements as a classification criterion. can do. In addition, weights for the above requirements may be adjusted according to the level and reflected in the block generator (BG) candidate selection criteria.

The identification value assigning unit 12b arranges the block generator candidates of each level on a predetermined basis and assigns an identification value. In each level, block generators can be sorted based on three criteria. That is, 1) the order of the block creator name, 2) the order of the block creator's public key, and 3) the order of the block creator registration.

The block generator determining unit 14 for each level selects a block generator at each level by the remaining operation units. That is, the remaining operation unit 14a divides the random number (randomA) by the number of elected people set in advance at a predetermined level, excludes block producer candidates having an identification value corresponding to the remainder, and returns to the'elected number of people value -1'. When the number of elected members is left by dividing the sum, excluding the block producer candidates having the identification value corresponding to the remainder, and dividing the random number by'the number of elected values -2' to exclude the block producer candidates. The above process is repeated until the block generator is randomly selected.

Although not shown in FIG. 2, the blockchain core server 100 analyzes signals from the outside, distributes them appropriately to the corresponding components, and commands the components to operate or not, and a private key used for electronic money transactions. And a cryptographic code processing unit that generates encryption codes such as public keys, and a dedicated app that updates the electronic wallet app (hereinafter referred to as "a dedicated app for electronic money transactions, or "exclusive app") to provide to user terminals Ta, Tb, and Tc The update unit may further include a wired/wireless communication unit as a communication interface for connecting the blockchain core server 10 to the outside by wire or wirelessly.

In addition, the encryption processing code unit of the blockchain core server 10 generates and provides a master key generator for generating a master key as a basic key value, a master key value, for example, hashed to generate and provide a private key for the corresponding user terminal Ta. A private key providing unit, a public key providing unit that generates and provides a corresponding public key based on the private key provided from the private key providing unit, and an electronic wallet address generator that generates and provides an electronic wallet address based on the corresponding public key. Can include. In the present embodiment, it has been described that quantum random numbers are applied to each level, but a combination of block hash values may be used as random numbers.

4 is an exemplary diagram of classifying block producer candidates into levels for selection of block producers in a block chain using the PoA consensus algorithm of the present invention.

In the embodiment of FIG. 4, block generator candidate nodes of a block generator group (Witness Group) are classified into a plurality of levels according to basic requirements (deposit, compliance, and contribution). As shown in FIG. 4, 39 block producer (BG) candidates are classified by three levels in a block producer group (Witness Group). Here, when a situation in which each level is eliminated as a block generator candidate occurs, among the block generator preliminary candidates, a preliminary candidate having a high conversion score of the basic requirement may be included in each level.

The quorum of the Block Producer Group (Witness Group) is 39, but vacancy may occur due to voluntary resignation or withdrawal. At this time, among the pending preliminary candidates (3D), the number of vacancy can be newly participated according to the ranking of basic requirements.

To implement this, the level classification unit reserves a block generator with high deposit, compliance, and contribution among the remaining block generator candidates when a predetermined block generator candidate among the block generator candidates of level 1, level 2, and level 3 is eliminated. Including candidates, reclassify into three levels again.

5 is an exemplary diagram showing random selection of block producers for each level in order to select block producers of a block chain using the PoA consensus algorithm of the present invention.

As shown in Fig. 5, each level consists of a total of 39 block producer candidates, 16 (Lv1), 13 (Lv2), and 10 (Lv3), for each level of block generation, for example, 8 A total of 23 block producers are selected, each with 8 people and 7 people.

In the above block generator election method, the higher the ranks from the lower level 1 to the upper level 3, the higher the selection probability. The probability of being elected for each level is set at 50% for Level 1, 61% for Level 2, and 70% for Level 3. That is, when selecting a block producer for each of a plurality of levels, it is preferable that the number of elected persons is set so that the selection probability increases as the level composed of block generator candidates having a high conversion score increases.

At this time, each level is sorted according to a certain criterion to give an identification value, and a random number is applied to select a final block generator. At this time, the elected block producers determine the order of block generation by consensus, and generate and propagate blocks in the order determined in the round.

Returning to FIG. 2, the quantum random number summing unit 13 receives quantum random numbers generated and submitted by a plurality of block generator candidates, and sums the quantum random numbers.

Meanwhile, a plurality of block generator candidate nodes 20 each have a quantum random number generator 21. In the system according to the present invention, when randomly selecting a block generator from a block generator group (Witness Group), a quantum random number obtained from a quantum random number generator is used as an input seed of the random function. Use. In particular, a unique quantum random number provided by a quantum random number generator has a great advantage in reinforcing security because it can avoid duplication of random numbers.

In general, a quantum random number generator is composed of a quantum random number generator IC chip and a USB connector, and can operate in a module form.

In addition, any quantum random number generator can be used as long as it has a function of generating a quantum random number, such as a radioactive isotope method or a method of using randomness of light, and there is no particular limitation on this part. A quantum random number in the radioactive isotope method is a natural random number generated using a random pulse generated corresponding to the emission time of the alpha particle emitted when the atomic nucleus is naturally decayed.

6 is a flowchart of a method for selecting a block producer of a block chain using a PoA consensus algorithm according to the first embodiment of the present invention, and FIG. 7 is a block chain using the PoA consensus algorithm according to the second embodiment of the present invention. Is a flow chart of a method for selecting a block generator, and FIG. 8 is a flowchart of a method for selecting a block generator according to the present invention.

As shown in FIG. 6, the nodes of the block generator candidate group (Witness group) are classified into a plurality of levels according to basic requirements including a deposit, compliance, and contribution (S1).

Blockchain core server 10 selects a certain percentage of block producers by applying random numbers from a plurality of classified levels (S2). A method of selecting a certain ratio of block generators by applying random numbers at a plurality of levels will be described later.

The block producers for each level determine the block generation order according to a certain criterion and agree on the block generation order (S3). Then, the block creator generates and propagates the block according to the agreed order (S4).

Here, referring to FIG. 5, at the beginning of each round, 23 block producers (BGs) generate blocks in an order agreed upon by a certain number of block producers (BGs, for example, 16 or more, that is, 70% or more). Perform. The order of generation of the block creators may be in the order of the name of the block creator, the order of the public key of the block creator, the order of registration of the block creator, and the like.

On the other hand, as another embodiment of the method for selecting a block producer, a method of selecting a block producer by applying different weights to a deposit, a degree of compliance, a degree of contribution, etc. forming a basic condition will be described with reference to FIG. 7.

As shown in FIG. 7, block generator candidates of the block generator candidate group (Witness group) are classified into a plurality of levels according to a predetermined criterion (T1).

In the case of selecting the conversion into a score that applies different weights to each requirement constituting the basic requirement that is the level classification criterion (T2), the blockchain core server 10 determines the deposit, compliance, and contribution that constitute the basic requirements. Different weights are assigned to each, and block generator candidates are reclassified into a plurality of levels (T3).

Here, the weighting method is, for example, a method of assigning a greater weight to the degree of compliance than the deposit, and is composed by assigning various weights according to the importance of the components constituting the basic requirements when implementing the system. Because it can be, detailed description is omitted.

The blockchain core server 10 applies a random number to each classified level and selects a certain percentage of block producers at each level (T4).

Block producers elected for each level determine the order of block generation according to a certain criterion and agree on the order of block generation (T5).

The block producer generates and propagates the block according to the agreed order (T6).

8 is a flowchart of a method of selecting a block generator using a quantum random number when selecting a block generator using a PoA consensus algorithm according to the present invention. As shown in FIG. 8, when a block generator for each level is selected (S20), the block generator candidates for each level are sorted on a predetermined basis to give an identification value (No. 1 to the number of block generators) (S21). Block generator candidates for each level generate a quantum random number and submit it to the blockchain core server 10 (S22).

The quantum random number summing unit 13 calculates a random number sum (randomA) by summing the random number values of the block generator candidates for each level (S23).

The block generator determination unit 14 for each level of the block chain core server 10 of FIG. 2 selects a block generator at each level by the remaining operation units. That is, the remaining calculation unit 14a divides the random number (randomA) by the number of elected people set in advance at a predetermined level, excludes the block generator candidates having an identification value corresponding to the remainder, and calculates the random number again to the number of elected number -1. Divide, exclude block producer candidates having an identification value corresponding to the remainder, divide the random number by the number of elected number -2 again, and perform the remainder operation to exclude block producer candidates having an identification number corresponding to the remainder value. Thus, the above process is repeated until the number of elected members remains, thereby randomly selecting a block generator (S24). In this case, a block generator candidate that is not excluded is selected as the final block producer.

On the other hand, when it is determined that there is a block generator candidate to be eliminated from the block generator candidate among the block generator candidates of level 1, level 2, and level 3 (S25), the block that does not belong to the level Block generator candidates for each level are regrouped by adding a block generator preliminary candidate having a high conversion score among the generator candidates (S26).

It is determined whether the block generator selection process has been completed more than a predetermined number of times (S27), and if not more than a predetermined number of times, the process returns to step S22. Thereafter, as described above, the block generator candidate for each level generates a random number and submits it to the blockchain core server, and the above-described process is repeated.

According to this method of selecting a block producer, it is possible to speed up the block generation speed, supplement vulnerabilities, and strengthen security against DDoS attacks.

Although not described in detail in the above-described embodiment, for nodes that cannot be selected as block generators every time due to random selection of block generators, block generators elected as block generators at least a certain number of times (for example, 10 times) for each level Excluding the candidate nodes, a block generator may be selected by applying a quantum random number to the remaining block generator candidate nodes of each level.

In addition, in the above-described embodiment, a quantum random number was described as an example as an input seed of a random function when randomly selected, but the block hash value of the first block of the previous round, the hardware random number, the software random number, and the block hash value Any random number from a combination can be used.

In the case of selecting a block generator using the fair consensus algorithm (ePOA) method as in the present invention, a large network such as Bitcoin or Ethereum secures by selecting randomness from the target group corresponding to the basic requirements. While maintaining security, transaction speed can be dramatically improved with fewer nodes like EOS.

In addition, according to the present invention, there is an advantage that it is very fast and efficient to select a block producer or to reach a consensus on block generation and verification. In addition, according to the ePoA method according to the present invention, any node participating in the blockchain ecosystem has an opportunity to apply as a block producer.

In addition, according to the present invention, when it is determined that it contributes to the ecosystem of the corresponding block chain and can take responsibility for the role of maintaining a healthy community, it can become a member of the Block Producer Group (Witness Group).

The above is an illustration of the present invention, and should not be interpreted limitedly. Although several exemplary embodiments of the present invention have been described, those skilled in the art will readily understand that many changes are possible in the exemplary embodiments without significantly departing from the novel teachings and advantages of the present invention. Accordingly, all such modifications are intended to be included within the scope of the invention as defined in the claims. Therefore, the above is an illustration of the present invention, and should not be construed as being limited to specific embodiments in the disclosed or disclosed invention, and changes to the disclosed embodiments and other embodiments are disclosed in this specification. It is included within the scope of the invention.

2_1~2_23: Block generator node 10_1~10_23: Block group
10: Blockchain Core Server
11: Block generator candidate node information database
12: level classifier of block generator candidates
12a: block generator candidate score conversion unit 12b: identification value assignment unit
13: quantum random number summing unit 14: block generator determination unit for each level
14a: remainder operation unit 20: block generator candidate node
22: quantum random number generator

Claims (11)

As a block producer election system using the blockchain's PoA consensus algorithm,
A plurality of nodes that are candidates for block producers in the PoA block generator group,
Block generator nodes are classified into a plurality of levels according to the conversion score obtained by converting the basic requirements including the deposit, compliance, and contribution of the block generator candidate nodes into points, and block generator candidate nodes for each level are sorted based on a predetermined sorting criterion. Block producer using the PoA consensus algorithm of the blockchain, characterized by including a blockchain core server that aligns and assigns an identification value and selects a block producer by applying a random number generated by the block producer candidate node at each level. Election system. The method of claim 1,
The blockchain core server sums up a node information database in which information of block generator nodes is stored, a level classifier that classifies block generator candidates into a plurality of levels based on basic requirements, and a quantum random number submitted by a plurality of block generator candidate nodes. A quantum random number summing unit that calculates the sum of random numbers, and the remaining operation that divides the random number sum by the number of block generator candidates to be elected previously set in each level and excludes the block generator candidates having an identification number corresponding to the remaining value. A block generator election system using a block chain's PoA consensus algorithm, which has a block generator decision unit that determines each block producer. The method of claim 2,
When there is a block generator candidate node to be eliminated at a predetermined level, the level classifier reclassifies the block generator candidate nodes into a plurality of levels by adding to a block generator candidate group having a high conversion score among the preliminary candidates for block generators not belonging to the level. It is a block producer election system using the blockchain's PoA consensus algorithm. The method of claim 2,
The level classification unit assigns different weights to each requirement and converts it into a score, a system for selecting a block producer using the PoA consensus algorithm of the blockchain. The method of claim 2,
The plurality of nodes will include a quantum random number generator, block producer election system using the PoA consensus algorithm of the block chain. As a block producer election method using the blockchain's PoA (Proof-of-Authority) consensus algorithm,
A first step of classifying the block generator nodes into a plurality of levels according to the conversion score obtained by converting the basic requirement items including the deposit, the degree of compliance and the contribution of the block generator nodes of the block generator group of the PoA into a score;
A second step of arranging block generator candidate nodes for each level according to a predetermined sorting criterion to give an identification value;
A third step of generating and submitting a random number by a predetermined number of block generator candidate nodes designated in each level;
A fourth step of calculating a random sum by summing the random number values of the block generator candidate nodes for each level;
A method for selecting a block producer using a PoA consensus algorithm of a block chain, characterized in that it comprises a fifth step of selecting a block producer by performing a remainder operation that divides the random number for each level by a preset number of elected people. The method of claim 6,
In the fifth step, the remainder calculation is performed by dividing the random number of each level by the number of elected people set in advance at a predetermined level, excluding the block generator candidate nodes having an identification value corresponding to the remainder, and again, the random number sum as the number of elected people. Block producer selection method using the PoA consensus algorithm of a block chain, characterized in that the process of dividing by and excluding block producer candidate nodes having an identification value corresponding to the remaining value is repeatedly performed until a preset number of elected members remains. The method of claim 6,
In the first step, when there is a block generator candidate node to be eliminated at a predetermined level, a block generator preliminary candidate node having a high conversion score among block generator candidates not belonging to the level is added to the block generator candidate group, and the block generator candidate node is selected. A method for selecting a block producer using the PoA consensus algorithm of the blockchain, which includes the step of reclassifying into a plurality of levels. The method of claim 6,
The first step of classifying block generator candidates into a plurality of levels according to the conversion score obtained by converting the basic requirements including the deposit, compliance and contribution of the nodes of the block generator group into points,
A method for selecting a block producer using a PoA consensus algorithm of a block chain, comprising the step of converting the score into a score by assigning a different weight to each of the requirements. The method according to any one of claims 6 to 9,
A method for selecting a block producer using the PoA consensus algorithm of the blockchain, which is to set the number of people to be elected so that the higher the level consisting of block producer candidates with a higher conversion score when selecting a block producer for each level. The method of claim 10,
Each node generates a quantum random number as the random number, a method for selecting a block producer using a PoA consensus algorithm of a block chain.

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