KR102391186B1 - Method and system for outputting external command - Google Patents

Abstract

According to an embodiment of the present invention, a blockchain external command output method using a secret sharing technique comprises: a first step of allowing a gateway to obtain command information to command an external server; a second step of allowing the gateway to transmit the command information to a transaction execution unit; and a third step of allowing the transaction execution unit to transmit the command information to the external server. The transaction execution unit includes a plurality of nodes individually having unique IDs. In the third step, each of the plurality of nodes may divide a portion of the command information and transmit the divided command information to the external server.

Description

Blockchain external command output method and system using secret sharing technique {METHOD AND SYSTEM FOR OUTPUTTING EXTERNAL COMMAND}

The present invention relates to a method and system for outputting a block chain external command using a block chain secret sharing technique, and more particularly, a block chain secret sharing technique for securing the reliability of a command in the process of transmitting a predetermined command to an external server. It relates to a method and system for outputting an external block chain command.

In a block chain, small data called 'blocks' are stored in a chain-type, link-based distributed data storage environment created based on the P2P method, so that no one can arbitrarily modify it, and anyone can see the result of the change. It is a ledger management technology based on distributed computing technology that can be viewed.

This is fundamentally a form of distributed data storage technology, and it is a change list that records continuously changing data in all participating nodes, and is designed to prevent arbitrary manipulation by the operator of the distributed node.

However, such a blockchain system also has technical limitations.

For example, a blockchain system cannot actively work with external systems, and it is difficult to record data independently.

On the other hand, oracle was devised to overcome this limitation.

Oracle refers to bringing data from the block chain into the block chain and exporting the data from the block chain to the outside. Oracle acts as a bridge that connects the isolated blockchain ecosystem with the outside world.

However, although interlocking between the block chain and external systems is possible through the Oracle system, there is a limitation in that data reliability cannot be guaranteed because data input from the external system is not verified.

On the other hand, Korean Patent Registration No. 10-2288776 B1 (2021.08.05) discloses a blockchain transaction verification system and a blockchain transaction verification method, but this also has a limitation in that external information is not verified. .

The present invention is to solve the above problems, and to provide a block chain external command output method and system using a secret sharing technique that can secure the reliability of a command in the process of transmitting a predetermined command to an external server. .

The problem to be solved by the present invention is not limited to the above-mentioned problems, and the problems not mentioned will be clearly understood by those of ordinary skill in the art to which the present invention belongs from the present specification and the accompanying drawings. .

A block chain external command output method using a secret sharing technique according to an embodiment of the present invention includes: a first step of a gateway acquiring command information to command an external server; a second step in which the gateway transmits the command information to the transaction execution unit; and a third step in which the transaction execution unit transmits the command information to the external server, wherein the transaction execution unit includes a plurality of nodes each having a unique identification ID, wherein the third step includes a plurality of the nodes Each may divide a portion of the command information and transmit the divided command information to the external server.

According to the block chain external command output method using the secret sharing technique according to an embodiment of the present invention, there is an advantage in that the reliability of the command can be secured in the process of transmitting a predetermined command to an external server.

Effects of the present invention are not limited to the above-described effects, and effects not mentioned will be clearly understood by those of ordinary skill in the art to which the present invention pertains from the present specification and accompanying drawings.

1 is a schematic diagram illustrating a block chain external command output system using a secret sharing technique implementing a block chain external command output method using a secret sharing technique according to an embodiment of the present invention communicating with another device.
2 is a schematic configuration diagram of a block chain external command output system using a secret sharing technique that implements a block chain external command output method using a secret sharing technique according to an embodiment of the present invention.
3 is a schematic configuration diagram for explaining a block chain external input verification method according to another embodiment of the present invention.
4 is a schematic configuration diagram for explaining a block chain external command output method using a secret sharing technique according to an embodiment of the present invention.
5 is a schematic configuration diagram for explaining a feedback information block chain recording method according to another embodiment of the present invention.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. However, the spirit of the present invention is not limited to the presented embodiments, and those skilled in the art who understand the spirit of the present invention may add, change, delete, etc. other elements within the scope of the same spirit, and may use other degenerative inventions or the present invention. Other embodiments included within the scope of the invention may be easily proposed, but this will also be included within the scope of the invention.

A block chain external command output method using a secret sharing technique according to an embodiment of the present invention includes: a first step of a gateway acquiring command information to command an external server; a second step in which the gateway transmits the command information to the transaction execution unit; and a third step in which the transaction execution unit transmits the command information to the external server, wherein the transaction execution unit includes a plurality of nodes each having a unique identification ID, wherein the third step includes a plurality of the nodes Each may divide a portion of the command information and transmit the divided command information to the external server.

In the third step, each of the plurality of nodes encrypts the command information using an asymmetric key encryption method and transmits it to the external server, and the decryption unit included in the external server is divided from each of the plurality of nodes. a fourth step of decoding the command information; and a fifth step of verifying, by the verification unit included in the external server, whether the decoded and divided command information satisfies a predetermined condition.

Also, the predetermined condition may be a condition in which one piece of the command information is completed when the divided command information is collected.

In addition, in the third step, each of the plurality of nodes transmits unique identification ID information and an encryption time point at which the command information is encrypted to the external server, and the predetermined condition is one when the divided command information is collected. The command information of is completed, and the difference between the encryption time points may be less than or equal to a preset time difference.

A block chain external command output system using a secret sharing technique according to another embodiment of the present invention includes: a gateway for acquiring command information to command an external server; and a transaction execution unit that receives the command information from the gateway and transmits the command information to the external server, wherein the transaction execution unit includes a plurality of nodes each having a unique identification ID, the plurality of nodes Each may divide a portion of the command information and transmit the divided command information to the external server.

In addition, each of the plurality of nodes encrypts the command information using an asymmetric key encryption method and transmits it to the external server, the external server includes: a decryption unit for decrypting the command information divided from each of the plurality of nodes; and a verification unit that verifies whether the decoded and divided command information satisfies a predetermined condition.

Also, the predetermined condition may be a condition in which one piece of the command information is completed when the divided command information is collected.

In addition, each of the plurality of nodes transmits unique identification ID information and an encryption time point at which the command information is encrypted to the external server, and the predetermined condition is that when the divided command information is collected, one command information is completed, the difference between the encryption time points may be less than or equal to a preset time difference.

Elements having the same function within the scope of the same idea shown in the drawings of each embodiment will be described using the same reference numerals.

1 is a schematic diagram illustrating a block chain external command output system using a secret sharing technique implementing a block chain external command output method using a secret sharing technique according to an embodiment of the present invention communicating with another device.

2 is a schematic configuration diagram of a block chain external command output system using a secret sharing technique that implements a block chain external command output method using a secret sharing technique according to an embodiment of the present invention.

3 is a schematic configuration diagram for explaining a block chain external input verification method according to another embodiment of the present invention.

4 is a schematic configuration diagram for explaining a block chain external command output method using a secret sharing technique according to an embodiment of the present invention.

5 is a schematic configuration diagram for explaining a feedback information block chain recording method according to another embodiment of the present invention.

In the accompanying drawings, in order to more clearly express the technical spirit of the present invention, parts that are not related to the technical spirit of the present invention or that can be easily derived from those skilled in the art have been simplified or omitted.

Throughout the specification, when a part is "connected" with another part, this includes not only the case of being "directly connected" but also the case of being "electrically connected" with another element interposed therebetween. . In addition, when a part "includes" a certain component, it means that other components may be further included, rather than excluding other components, unless otherwise stated, and one or more other features However, it is to be understood that the existence or addition of numbers, steps, operations, components, parts, or combinations thereof is not precluded in advance.

In this specification, a "part" includes a unit realized by hardware, a unit realized by software, and a unit realized using both. In addition, one unit may be implemented using two or more hardware, and two or more units may be implemented by one hardware.

Some of the operations or functions described as being performed by the terminal or device in this specification may be instead performed by a server connected to the terminal or device. Similarly, some of the operations or functions described as being performed by the server may also be performed in a terminal or device connected to the server.

Hereinafter, the present invention will be described in detail with reference to FIGS. 1 to 5 .

First, the block chain external input verification method according to an embodiment of the present invention may be a component constituting a part of the smart contract method and system using the block chain (B).

That is, the smart contract method is largely a block chain external input verification method (step) according to an embodiment of the present invention shown in FIG. 3, and a secret sharing technique according to another embodiment of the present invention shown in FIG. It may include a method (step) of outputting a block chain external command used and a method (step) of recording feedback information block chain according to another embodiment of the present invention shown in FIG. 5 .

As an example, the method (step) of verifying the external input of the block chain, the method of outputting a block chain external command using the secret sharing technique (step), and the method of recording the feedback information block chain (step) are implemented sequentially in time series. It may be one configuration of the contract method.

As an example, the smart contract method may be implemented by the smart contract system 10 .

For example, as shown in FIGS. 1 and 2 , the smart contract system 10 may communicate with the user's electronic device (E), an external server (S), and a block chain (B).

As an example, the smart contract system 10 receives predetermined data and information from a communication unit 200 that can communicate with the user's electronic device (E), an external server (S), and a block chain (B), and a manager. An input unit 300, a memory unit 400 for storing predetermined data and information, a display unit 500 for displaying predetermined data and information, and a processing unit for calculating, controlling, and processing information required to implement the smart contract method (100) may be included.

Here, the processing unit 100 may further include a gateway 110 , a transaction execution unit 120 , and a ledger recording unit 130 , which will be described in more detail below.

Hereinafter, with reference to FIGS. 3 to 5, the block chain external input verification method (step) constituting the smart contract method, the block chain external command output method (step) using the secret sharing technique, and the feedback information block The chain recording method (steps) will be described in detail.

One. Blockchain external input verification method and system

3 is a schematic diagram for explaining the block chain external input verification method and system, which is one component of the smart contract method.

The block chain external input verification method and system are for checking/verifying whether the information to be input (stored) in the block chain (B) (external input information) is correct information through an external server.

For example, as shown in FIG. 3 , the block chain external input verification method may include a first step (①) in which the gateway 110 obtains request information for an external input requiring verification.

For example, the request information may be information input by a user to the gateway 110 through his/her electronic device E.

For example, the request information is information to be input (stored) in the block chain (B), and may be information that requires verification of authenticity.

For example, the request information may be information such as "an apple is a fruit" and "If A is elected in an election, B transfers 1 million won to A".

Here, if the requested information is "an apple is a fruit" information, verification of whether the apple is a fruit or not is necessary, and the information "If A is elected in the election, B transfers 1 million won to A" In this case, it may be necessary to verify the authenticity of whether A has been elected in the election.

For example, the first step may be implemented by the gateway 110 , and the gateway 110 may be implemented by obtaining request information requiring verification from a user.

Here, as an example, in the block chain external input verification method, the second step (②) in which the gateway 110 transmits the request information to the transaction execution unit 120, the transaction execution unit 120 transmits the request information to the external server ( A third step (③) of requesting result information requiring verification to perform the requested information as S) and a fourth step (④) in which the transaction execution unit 120 obtains the result information from the external server (S) ) may be further included.

For example, the transaction execution unit 120 may be configured to communicate with the external server (S) to obtain result information requiring verification to perform the request information from the external server (S).

That is, the transaction execution unit 120 receives the request information from the gateway 110 and requests the result information when verification is required to perform the request information to the external server S, It may be configured to obtain the result information that is a result of the request information that requires verification from the server (S).

For example, when the request information is information that the request information is “an apple is a fruit,” the transaction execution unit 120 sends the transaction execution unit 120 to the external server S, a national biological species knowledge information system (example). access to obtain the result information (eg, "an apple is a fruit" or "an apple is not a fruit") for the requested information, and the requested information is "If A is elected in the election, B In the case of “transfer 1 million won to A”, the transaction execution unit 120 determines whether A has been elected in the election by accessing the external server (S), the National Election Commission system (example), and adding it to the request information. It is possible to obtain the result information (eg, "A was elected in an election" or "A was not elected in an election") for the

Here, as an example, the transaction execution unit 120 may include a plurality of nodes each having a unique identification ID.

Although the figure shows that the transaction execution unit 120 includes a total of three nodes, the first node EP1, the second node EP2, and the third node EP3, the transaction execution unit 120 may include tens, hundreds, or thousands of nodes.

Each of the plurality of nodes may have a unique identification ID different from that of other nodes.

Here, in the second step, the gateway 110 may transmit the request information to each of the plurality of nodes in parallel.

That is, the gateway 110 may transmit the request information to each of the first node EP1 , the second node EP2 , and the third node EP3 among the numerous nodes.

At this time, the gateway 110 transmits the request information to each of the first node EP1 , the second node EP2 , and the third node EP3 (any one of the plurality of nodes). information on whether to transmit the information to the node) may be transmitted to each of the first node EP1 , the second node EP2 , and the third node EP3 .

In addition, in the third step, each of the plurality of nodes may request the result information for the request information from the external server S.

That is, each of the first node EP1 , the second node EP2 , and the third node EP3 may request the result information for the request information from the external server S.

In addition, in the fourth step, each of the plurality of nodes may obtain the result information from the external server S.

That is, each of the first node EP1 , the second node EP2 , and the third node EP3 may obtain the result information for the request information from the external server S.

Here, as an example, in the block chain external input verification method, in the fifth step, the transaction execution unit 120 transmits the transaction execution result information based on the result information to the gateway 110 and the ledger recording unit 130 . (⑤, ⑥) may be further included.

That is, the first node EP1 , the second node EP2 , and the third node EP3 of the transaction execution unit 120 are each based on the result information obtained from the external server S to generate the execution result information, and transmit the execution result information to the gateway 110 and the ledger recording unit 130 .

For example, the execution result information may be "confirmed that the apple is a fruit" or "confirmed that the apple is not a fruit" information, "confirmed that A has been elected in the election" or "A has confirmed that the I have confirmed that I have not been elected", or "It has been confirmed that A has been elected and ordered (or transferred) 1 million won from B to A" or "A has not been elected in the election. It was confirmed that there was no transfer order,” it may be information.

In addition, as an example, the first node EP1 , the second node EP2 , and the third node EP3 of the transaction execution unit 120 indicate that the result information is “an apple is not a fruit” or In the case of information that "A was not elected in the election", the execution result information may not be generated. As a result, in that the execution result information is not generated, the first node EP1 , the second node EP2 , and the third node EP3 of the transaction execution unit 120 are connected to the gateway 110 . ) and the ledger recording unit 130 may not deliver the execution result information.

Here, the plurality of nodes of the transaction execution unit 120 may transmit node information including the execution result information and the identification ID information to the gateway 110 and the ledger recording unit 130, respectively. In addition, the delivery information may be delivered.

Here, in addition to the identification ID information, the node information may further include information on a time point of obtaining the result information from the external server (S).

Accordingly, in the fifth step, each of the plurality of nodes sends the execution result information, the identification ID information, and the acquisition time (of the result information in the fourth step) to the gateway 110 and the ledger recorder 130 . acquisition time) may be transmitted.

Here, as an example, the block chain external input verification method may further include a sixth step of verifying, by the gateway 110 and the ledger recording unit 130, whether the execution result information satisfies a predetermined condition.

That is, each of the gateway 110 and the ledger recording unit 130 may determine whether the execution result information obtained from the plurality of nodes satisfies the predetermined condition.

Here, the predetermined condition may be a condition in which the execution result information obtained from the plurality of nodes is equal to or greater than a preset matching rate, or may be a condition in which the execution result information from one or more specific nodes should be included.

For example, the matching rate may be predetermined by an administrator, and may be set to 100%, 50%, or the like.

However, for convenience of explanation, it is assumed that the coincidence rate is 100%.

Each of the gateway 110 and the ledger recording unit 130 may calculate a matching rate of the execution result information obtained from the first node EP1, the second node EP2, and the third node EP3. there is.

If all of the execution result information obtained from the first node EP1, the second node EP2, and the third node EP3 is “confirmed that the apple is a fruit” or “A has been elected in the election is confirmed and ordered (or transferred) to transfer 1 million won from B to A", it is determined that the execution result information satisfies the predetermined condition in that the matching rate of the execution result information is 100% can be

However, if at least one of the execution result information obtained from the first node EP1, the second node EP2, and the third node EP3 is different, or the first node EP1, the When the execution result information is not obtained from at least one of the second node EP2 and the third node EP3 within a predetermined time, the execution result information meets the predetermined condition in that it is less than the predetermined matching rate. may be judged to be unsatisfactory.

Meanwhile, the predetermined condition may be a condition in which the execution result information obtained from the plurality of nodes is equal to or greater than a preset matching rate, and the difference between the acquisition times is less than or equal to a preset time difference.

That is, the predetermined condition may be a condition in which the plurality of pieces of execution result information each obtained from the plurality of nodes is equal to or greater than a preset coincidence rate, and a time difference between a plurality of acquisition points is equal to or less than a preset time difference.

The result information obtained by each of the plurality of nodes by accessing the external server S may vary depending on a difference in time at which the result information is obtained in some cases (according to the meaning of the request information).

Accordingly, in order to more accurately verify authenticity, the predetermined condition may be a condition in which a time difference between a plurality of acquisition times is equal to or less than a predetermined time difference and the execution result information is equal to or greater than a predetermined coincidence rate.

Here, as an example, the gateway 110 and the ledger recording unit 130 first determine whether the difference between the acquisition times satisfies a preset time difference or less, and if not satisfied, the It may not be determined whether the execution result information is equal to or greater than a preset matching rate.

As a result, the load required for the gateway 110 and the ledger recording unit 130 to determine whether the execution result information is equal to or greater than a preset matching rate can be minimized.

Here, as an example, in the block chain external input verification method, when the predetermined condition is satisfied, the ledger recording unit 130 records the request information and/or the execution result information in the block chain B, and the The method may further include a seventh step of re-transmitting the request information to the transaction execution unit 120 by the gateway 110 when the predetermined condition is not satisfied.

That is, the ledger recording unit 130 records the request information and/or the result information in the block chain B when the execution result information satisfies the predetermined condition, and when the predetermined condition is not satisfied The request information and/or the execution result information may be deleted (discarded).

In addition, when the execution result information satisfies the predetermined condition, the gateway 110 may transmit this fact information and the fact information input (recorded) in the block chain B to the user's electronic device E, , when the predetermined condition is not satisfied, the request information may be retransmitted to the transaction execution unit 120 .

Here, when the gateway 110 re-delivers the request information to the transaction execution unit 120, the above-described third step, the fourth step, the fifth step, and the sixth step are sequentially re-transmitted. can be implemented.

Meanwhile, when the gateway 110 retransmits the request information to the transaction execution unit 120 , the gateway 110 transmits the first node EP1 , the second node EP2 , and the The request information may be transmitted to a plurality of nodes other than the third node EP3.

As a result, when any one of the previously transmitted first node EP1, the second node EP2, and the third node EP3 occurs in an abnormal situation, the request information is re-reviewed using the other nodes. Verification can be done.

2. Method and system for outputting commands outside of blockchain using secret sharing technique

4 is a schematic diagram for explaining a block chain external command output method and system using the secret sharing technique, which is one of the smart contract methods.

Those that overlap with the above-described blockchain external input verification method and system or that can be easily inferred from a person skilled in the art will be omitted or simplified.

The block chain external command output method and system using the secret sharing technique is to prevent the corresponding command information from being forged/falsified when a predetermined command is given to the external server (S).

For example, as shown in FIG. 4 , the block chain external command output method using the secret sharing technique includes the first step (①) of the gateway 110 acquiring command information to command the external server S. may include

That is, the gateway 110 may obtain the command information from the user's electronic device E, or may obtain the command information by the above-described block chain external input verification method.

To explain this in more detail, the gateway 110 may obtain the command information 'B transfers 1 million won to A' from the user, and in the block chain external input verification method, the request information 'A If the information as a result of the execution of "I confirmed that A has been elected in the election" in the information 'B transfers 1 million won to A' if elected in the election, 'B transfers 1 million won to A' The command information 'to transfer' may be generated and obtained.

Here, as an example, in the method of outputting a block chain external command using the secret sharing technique, the second step (②) in which the gateway 110 transmits the command information to the transaction execution unit 120 and the transaction execution unit ( 120) may further include a third step (③) of transmitting the command information to the external server (S).

For example, in the second step, the gateway 110 may transmit the command information to each of the plurality of nodes.

That is, the gateway 110 may transmit the command information in parallel to the first node EP1 , the second node EP2 , and the third node EP3 among the plurality of nodes, respectively. In addition, the delivery information may be delivered.

Meanwhile, in the third step, each of the plurality of nodes may generate the divided command information by dividing a portion of the command information, and may transmit the generated divided command information to the external server S. In addition, the delivery information may be delivered.

Here, the external server S may be a predetermined bank server for B to transfer 1 million won to A.

For example, when the command information, 'B transfers 1 million won to A', is data composed of "A, B, C, D", the first node EP1 is "A, B, Generates the divided command information that is “A, B, C” which is a part of “C, D”, and the second node EP2 is “A, B, D” that is a part of “A, B, C, D” Generates the divided command information, and the third node EP3 generates the divided command information that is "B, C, D" which is a part of "A, B, C, D", The command information divided into S) may be transmitted.

Here, for example, in the third step, each of the plurality of nodes may encrypt the command information using an asymmetric key encryption method and transmit it to the external server S.

That is, the first node EP1, the second node EP2, and the third node EP3 may encrypt the divided command information using the public key of the external server S, and The divided command information may be transmitted to the external server (S), respectively.

At this time, each of the plurality of nodes may transmit the encryption time point at which the identification ID and the command information are encrypted to the external server (S).

Meanwhile, the third step may be implemented without the first step and the second step being implemented as a premise.

To explain this in more detail, in the above-described block chain external input verification method, the first node EP1, the second node EP2, and the third node EP3 of the transaction execution unit 120 are "A If is elected in the election, the result information “A has been elected in the election” can be obtained from the external server S for the requested information “B transfers 1 million won to A”, and A As it is confirmed that the election has been won, it is also possible to generate the command information "B transfers 1 million won to A" and transmit the command information to the external server S.

On the other hand, as an example, in the method of outputting a block chain external command using the secret sharing technique, the decryption unit X included in the external server S decrypts the command information divided from each of the plurality of nodes. (④) may be further included.

For example, the decoding unit (X) may be a component of the external server (S).

For example, the decoding unit X may be configured to decode the command information divided from each of the plurality of nodes.

For example, the decryption unit X may decrypt the encrypted command information using its private key.

On the other hand, as an example, in the block chain external command output method using the secret sharing technique, the verification unit (Y) included in the external server (S) verifies the decrypted divided command information as to whether or not a predetermined condition is satisfied A fifth step (⑤) may be further included.

For example, the verification unit (Y) may be a component of the external server (S).

For example, the verification unit Y may be configured to receive the decoded and divided command information from the decoding unit X and verify whether the command information satisfies the predetermined condition.

Here, the predetermined condition may be a condition in which one piece of the command information is completed when the divided command information is collected.

To explain this in more detail, "A, B, C" which is the divided command information obtained from the first node EP1 and "A, B" which is the divided command information obtained from the second node EP2 , D", the command information "A, B, C, D" before division is completed.

That is, the predetermined condition is the condition before the division when the divided command information obtained from the first node EP1, the second node EP2, and/or the third node EP3 is collected and combined. It may be a condition in which "A, B, C, D", which is the command information, is satisfied.

On the other hand, the predetermined condition is the first node EP1 , the second node EP2 , and/or the third node EP3 obtained from the divided command information obtained by collecting and combining the divided command information before the division. The command divided from a predetermined specific node among the first node EP1, the second node EP2, and the third node EP3 while being equipped with command information “A, B, C, D” It may be a condition that information should be included.

To explain this in more detail, when the predetermined specific node is the first node EP1 and the decoder X fails to obtain the divided command information from the first node EP1, the second node When the divided command information obtained from (EP2) and the third node (EP3) are collected and combined, the command information before division "A, B, C, D" is provided, "A, B , C, D" in that the divided command information of the first node EP1 is not included in the command information, this case does not satisfy the predetermined condition.

When the command information satisfies the predetermined condition, the verification unit Y executes command information 'B transfers 1 million won to A', and transfers 1 million won from B's account to A's account. can

Meanwhile, as an example, the predetermined condition may be a condition in which one piece of the command information is completed when the divided command information is collected, and the difference between the encryption time points is less than or equal to a preset time difference.

Here, as an example, the verification unit (Y) first determines whether the difference between the encryption time points obtained from the plurality of nodes satisfies a preset time difference or less, and if not satisfied, obtains from the plurality of nodes When the divided command information is combined, it may not be determined whether one piece of the command information is completed. That is, in the predetermined condition, it is first determined whether the difference between the encryption time points is equal to or less than a preset time difference, and when the preset time difference or less is satisfied, the secondly divided command information is collected It may mean a condition in which one piece of the command information is completed.

If the command information does not satisfy the predetermined condition, the external server S may transmit information that the command information does not satisfy the predetermined condition to the gateway 110, at this time The gateway 110 may retransmit the command information to the transaction execution unit 120 .

Meanwhile, when the gateway 110 retransmits the command information to the transaction execution unit 120 , the gateway 110 transmits the first node EP1 , the second node EP2 , and the The command information may be transmitted to a plurality of nodes other than the third node EP3.

As a result, when at least one of the previously delivered first node EP1 , the second node EP2 , and the third node EP3 encounters an abnormal situation, other nodes are used to control the command information. Reprocessing may take place.

3. Feedback Information Blockchain Recording Method and System

5 is a schematic diagram for explaining the feedback information block chain recording method and system as one component of the smart contract method.

Those that overlap with the above-described blockchain external input verification method/system and the blockchain external command output method/system using the secret sharing technique or that can be easily inferred from the perspective of those skilled in the art will be omitted or simplified.

The feedback information block chain recording method and system prevent the corresponding feedback information from being forged/falsified when the external server (S) receives the feedback information that is the result of processing the command information, and records it in the block chain (B) it is for

As an example, as shown in FIG. 5 , the feedback information block chain recording method includes a step (①) of transmitting the feedback information generated from the external server S to the encryption unit Z to be described below. can do.

Here, the feedback information is information generated by the external server S, and may be information (eg, a transfer receipt) of 1 million won transferred from B's account to A's account.

Here, in the feedback information block chain recording method, the encryption unit (Z) included in the external server (S) encrypts the feedback information using asymmetric key encryption and a method, and transmits the feedback information to a proxy (P) It may further include a first step (②) of delivering.

For example, the encryption unit (Z) may be a component of the external server (S).

For example, the encryption unit (Z) may encrypt the feedback information using asymmetric key encryption and method, and may transmit the encrypted feedback information to the proxy (P).

At this time, the encryption unit Z transmits the command information to the external server S in the block chain external command output method using the above-described secret sharing technique as well as the encrypted feedback information. The node information and the forwarding information may be transmitted to the proxy (P).

In addition, the encryption unit Z transmits the feedback information to the plurality of nodes that the proxy P transmits the command information to the external server S in the block chain external command output method using the secret sharing technique. It can be delivered to the proxy (P) by further including a command to

At this time, the encryption unit Z encrypts the feedback information using the public key of the first node EP1, and encrypts the feedback information using the public key of the second node EP2, By encrypting the feedback information using the public key of the third node EP3, each parallel feedback information may be transmitted to the proxy P.

Here, as an example, the feedback information block chain recording method further includes a second step (③) in which the transaction execution unit 120 obtains the encrypted feedback information from the proxy P, and decrypts the feedback information. may include

The first node EP1 of the transaction execution unit 120 may receive the feedback information from the proxy P, which is information about transferring 1 million won from the account of B encrypted with its public key to the account of A. And, it is possible to decrypt the encrypted feedback information using its own private key.

Similarly, each of the second node EP2 and the third node EP3 receives the feedback information, which is information obtained by transferring 1 million won from the proxy P's own public key encrypted from B's account to A's account. can be transmitted, and the encrypted feedback information can be decrypted using its own private key.

That is, each of the plurality of nodes may obtain the encrypted feedback information from the proxy P and decrypt the feedback information.

Here, as an example, in the feedback information block chain recording method, the transaction execution unit 120 generates and delivers transaction execution feedback information based on the feedback information to the gateway 110 and the ledger recording unit 130 . A third step (④, ⑤) may be further included.

That is, each of the plurality of nodes may generate the execution feedback information, which is a transaction execution result, based on the decoded feedback information, and transmit it to the gateway 110 and the ledger recording unit 130 . In addition, the delivery information and the node information may also be delivered.

For example, the execution feedback information may be information that "1 million won was transferred from B's account to A's account", and also "1 million won was transferred from B's account to A's account because it was confirmed that A was elected in the election." has been transferred".

Here, the node information may further include information on a decoding time point when the feedback information is decoded, in addition to the identification ID information.

Here, as an example, the feedback information block chain recording method may further include a fourth step of verifying, by the gateway 110 and the ledger recording unit 130, whether the execution feedback information satisfies a predetermined condition.

That is, each of the gateway 110 and the ledger recording unit 130 may determine whether the execution feedback information obtained from the plurality of nodes satisfies the predetermined condition.

Here, the predetermined condition may be a condition in which the execution feedback information obtained from the plurality of nodes satisfies a predetermined agreement condition.

Here, the preset agreement condition may be a condition in which the execution feedback information from one or more specific nodes should be included, or a condition in which the execution feedback information obtained from the plurality of nodes is equal to or greater than a preset agreement rate.

For example, the matching rate may be predetermined by an administrator, and may be set to 100%, 50%, or the like.

However, for convenience of explanation, it is assumed that the coincidence rate is 100%.

Each of the gateway 110 and the ledger recording unit 130 may calculate a matching rate of the execution feedback information obtained from the first node EP1, the second node EP2, and the third node EP3. there is.

If all of the execution feedback information obtained from the first node EP1, the second node EP2, and the third node EP3 is information about transferring 1 million won from B's account to A's account, or A In the case where 1 million won is transferred from B's account to A's account after it has been confirmed that is has been elected in the election, it is determined that the execution feedback information satisfies the predetermined condition in that the matching rate of the feedback information is 100% can

However, if at least one of the execution feedback information obtained from the first node EP1, the second node EP2, and the third node EP3 is different, it is less than the preset matching rate. It may be determined that the execution feedback information does not satisfy the predetermined condition.

Meanwhile, the predetermined condition may be a condition in which the execution feedback information obtained from the plurality of nodes satisfies a predetermined agreement condition, and the difference between the decoding time points is less than or equal to a predetermined time difference.

That is, the predetermined condition may be a condition in which a plurality of pieces of execution feedback information each obtained from a plurality of nodes satisfy a preset agreement condition, and a time difference between a plurality of decoding time points is equal to or less than a preset time difference.

Here, as an example, the gateway 110 and the ledger recording unit 130 first determine whether the difference between the decoding time points satisfies a preset time difference or less, and if not satisfied, the data obtained from the plurality of nodes It may not be determined whether the execution feedback information satisfies a preset agreement condition.

As a result, the load required for the gateway 110 and the ledger recording unit 130 to determine whether the execution feedback information satisfies a preset agreement condition can be minimized.

Here, as an example, the feedback information block chain recording method further includes a fifth step (⑥) in which the ledger recording unit 130 records the execution feedback information in the block chain B when the predetermined condition is satisfied. can do.

Also, as an example, in the fifth step, when the execution feedback information does not satisfy the predetermined condition, the gateway 110 may request retransmission of the feedback information to the external server S.

That is, the ledger recording unit 130 records the execution feedback information in the block chain B when the execution feedback information satisfies the predetermined condition, and records the execution feedback information when the predetermined condition is not satisfied. It can be deleted (destroyed).

In addition, when the feedback information satisfies the predetermined condition, the gateway 110 may transmit this fact information and the fact information input (recorded) in the block chain B to the user's electronic device E, If the predetermined condition is not satisfied, the transmission of the feedback information to the external server S may be requested again.

Here, when the gateway 110 re-requests delivery of the feedback information to the external server S, the third step and the fourth step described above may be sequentially re-implemented.

On the other hand, when the gateway 110 re-requests delivery of the feedback information to the external server S, the external server S transmits the first node EP1 and the second node EP2 previously. and the feedback information may be transmitted to a plurality of nodes other than the third node EP3.

As a result, when any one of the previously delivered first node EP1, the second node EP2, and the third node EP3 occurs in an abnormal situation, the feedback information is re-reviewed using the other nodes. Verification can be done.

In the above, the configuration and features of the present invention have been described based on the embodiments according to the present invention, but the present invention is not limited thereto, and it is understood that various changes or modifications can be made within the spirit and scope of the present invention. It is intended that such changes or modifications will be apparent to those skilled in the art, and therefore fall within the scope of the appended claims.

110: gateway
120: transaction execution unit
130: ledger record book
B: Blockchain

Claims (8)

In the block chain external command output method using the secret sharing technique,
a first step of the gateway acquiring command information to command an external server;
a second step in which the gateway transmits the command information to the transaction execution unit; and
A third step of transmitting the command information to the external server by the transaction execution unit; includes,
The transaction execution unit,
A plurality of nodes each having a unique identification ID,
The third step is
Each of the plurality of nodes divides some of the command information and transmits the divided command information to the external server,
The third step is
Each of the plurality of nodes encrypts the command information using an asymmetric key encryption method and transmits it to the external server,
a fourth step of decoding, by a decoding unit included in the external server, the command information divided from each of the plurality of nodes; and
A fifth step of verifying, by the verification unit included in the external server, whether the decoded and divided command information satisfies a predetermined condition; further comprising,
The third step is
Each of the plurality of nodes transmits the encryption time point at which the unique identification ID information and the command information are encrypted to the external server,
The predetermined condition is
Firstly, the difference between the encryption time points is less than or equal to the preset time difference,
Second, the condition that one of the command information is completed when the divided command information is collected,
A method of outputting commands outside the block chain using the secret sharing technique.
delete delete delete In the block chain external command output system using the secret sharing technique,
a gateway for obtaining command information to command an external server; and
A transaction execution unit that receives the command information from the gateway and delivers the command information to the external server;
The transaction execution unit,
A plurality of nodes each having a unique identification ID,
Each of the plurality of nodes,
Part of the command information is divided and the divided command information is transmitted to the external server,
Each of the plurality of nodes,
Encrypting the command information using an asymmetric key encryption method and transmitting it to the external server,
the external server
a decoding unit for decoding the command information divided from each of the plurality of nodes; and
a verification unit that verifies whether the decoded and divided command information satisfies a predetermined condition;
Each of the plurality of nodes,
The unique identification ID information and the encryption time point at which the command information is encrypted are transmitted to the external server,
The predetermined condition is
Firstly, the difference between the encryption time points is less than or equal to the preset time difference,
Second, the condition that one of the command information is completed when the divided command information is collected,
Blockchain external command output system using secret sharing technique.
delete delete delete

Images