KR20220125130A - Electronic contract processing server that processes electronic contracts between parties by utilizing the two-dimensional code and operating method thereof - Google Patents

Abstract

The present invention relates to an electronic contract processing server that enables an electronic contract between parties through a reliable protocol to be supported and at the same time, enables verification of authenticity for the contract to be supported based on a two-dimensional code inserted with the predetermined information for verification of authenticity; and an operating method therefor. The electronic contract processing server comprises: a public key storing part; a confirmation request part; a first signature request part; a first decoding part; a second signature request part; a second decoding part; a message generating part; and a message transmitting part.

Description

An electronic contract processing server that processes an electronic contract between parties using a two-dimensional code and an operation method thereof

The present invention relates to an electronic contract processing server for processing an electronic contract between parties using a two-dimensional code and an operating method thereof.

In the past, when a contract was concluded between the parties, a predetermined contract containing contract information was prepared, and then the contract was sealed or signed by the parties. At this time, in order to guarantee the contents of the contract, a third party such as a notary public intervenes to draw up a contract between the parties in front of the third party, and the contract was conducted in the form of signing the seal of the contracting party and the third party together on the contract. .

Recently, as the need for an electronic contract to conclude a contract between the parties through online increases, the demand for a contract processing service that can support the party to proceed with the electronic contract more easily and guarantee such an electronic contract is increasing. have.

In this contract processing service, in that the process of confirming whether the contracting party is the true party who intends to conclude the contract is essential, it utilizes a predetermined electronic signature technology to verify whether the contracting party is the true party, Based on this, the introduction of a contract processing service that supports an electronic contract between the contracting parties may be considered.

In addition, after the electronic contract is concluded between the contracting parties, a new system that supports to verify whether the contract written between the contracting parties is authentic is also needed.

In this regard, by creating a two-dimensional code with predetermined information inserted for verification of the authenticity of the contract, and inserting the two-dimensional code into the contract, the user who concluded the electronic contract inserts the two-dimensional code into the contract If you scan with your own electronic terminal, you can consider introducing a system that determines whether the contract is genuine or not based on this two-dimensional code.

Therefore, while supporting the electronic contract between the parties through a reliable protocol, the system technology that supports the verification of the authenticity of the contract based on the two-dimensional code in which the predetermined information for authenticity verification is inserted. research is needed

The present invention intends to support to enable an electronic contract between parties through a reliable protocol, and at the same time to enable verification of the authenticity of a contract based on a two-dimensional code in which predetermined information for authenticity verification is inserted.

An electronic contract processing server for processing an electronic contract between parties according to an embodiment of the present invention includes a first public key corresponding to a first private key pre-stored in a first electronic terminal possessed by a first user; A public key storage unit in which a second public key corresponding to a second private key previously stored in a second electronic terminal held by a second user is stored, generated in the first electronic terminal from the first electronic terminal When the electronic contract is received and an electronic contract progress request requesting to proceed with the electronic contract with the second user is received, the second electronic terminal is instructed to check the contents of the electronic contract while transmitting the electronic contract When a feedback message indicating that the content of the electronic contract has been confirmed by the second user is received from a confirmation request unit for transmitting a confirmation request message to the second electronic terminal, to the first electronic terminal, to the electronic contract A first signature requesting unit requesting an electronic signature based on data for When the first electronic signature value is received from the first electronic terminal, after extracting the first public key from the public key storage unit, the first digital signature value is decrypted with the first public key to generate a first decryption value When the first decryption value is generated, the first decryption unit checks whether the first decryption value matches the data for the electronic contract, and the first decryption value matches the data for the electronic contract If it is confirmed, the verification of the first electronic signature value is completed, and a second signature requesting unit for requesting an electronic signature based on the data on the electronic contract to the second electronic terminal, the electronic contract As data is encrypted with the second private key stored in the second electronic terminal to generate a second electronic signature value, the second electronic terminal a second decryption unit that extracts the second public key from the public key storage unit and generates a second decryption value by decrypting the second digital signature value with the second public key when the second digital signature value is received; When the second decryption value is generated, it is checked whether the second decryption value matches the data for the electronic contract, and when it is confirmed that the second decrypted value matches the data for the electronic contract, the second electronic contract To complete verification of the signature value and to generate a contract completion message indicating that the contract between the first user and the second user has been completed, and the first electronic terminal and the second electronic terminal, the contract and a message transmission unit for transmitting a completion message.

In addition, the operating method of the electronic contract processing server for processing the electronic contract between the parties according to an embodiment of the present invention is the first corresponding to the first private key pre-stored in the first electronic terminal held by the first user. Maintaining a public key storage unit in which the first public key and the second public key corresponding to the second private key previously stored in the second electronic terminal held by the second user are stored, from the first electronic terminal When the electronic contract generated by the first electronic terminal is received and an electronic contract proceeding request requesting to proceed with the electronic contract with the second user is received, while transmitting the electronic contract to the second electronic terminal, the Transmitting a confirmation request message instructing to check the contents of the electronic contract; when a feedback message indicating that the contents of the electronic contract have been confirmed by the second user is received from the second electronic terminal, the first electronic terminal requesting an electronic signature based on the data on the electronic contract, the data on the electronic contract is encrypted with the first private key stored in the first electronic terminal to generate a first electronic signature value Accordingly, when the first electronic signature value is received from the first electronic terminal, after extracting the first public key from the public key storage unit, the first digital signature value is decrypted with the first public key to obtain a first decryption value generating, when the first decrypted value is generated, it is checked whether the first decrypted value matches the data for the electronic contract, and the first decrypted value matches the data for the electronic contract. Upon confirmation, completing verification of the first electronic signature value, and requesting an electronic signature based on the data on the electronic contract to the second electronic terminal, the data on the electronic contract is the second As a second electronic signature value is generated by being encrypted with the second private key stored in the electronic terminal, the second electronic signature value is generated from the second electronic terminal. When a self-signed value is received, extracting the second public key from the public key storage unit and decrypting the second digital signature value with the second public key to generate a second decrypted value, the second decrypted value is When generated, it is checked whether the second decryption value matches the data for the electronic contract, and when it is confirmed that the second decryption value matches the data for the electronic contract, the second electronic signature value Completing verification, generating a contract completion message indicating that the contract between the first user and the second user has been completed, and transmitting the contract completion message to the first electronic terminal and the second electronic terminal includes

The present invention can support to enable an electronic contract between parties through a reliable protocol, and at the same time support to enable verification of the authenticity of a contract based on a two-dimensional code in which predetermined information for authenticity verification is inserted.

1 is a diagram illustrating the structure of an electronic contract processing server for processing an electronic contract between parties according to an embodiment of the present invention.
2 is a view for explaining an electronic contract processing server for processing an electronic contract between parties according to an embodiment of the present invention.
3 is a flowchart illustrating an operation method of an electronic contract processing server for processing an electronic contract between parties according to an embodiment of the present invention.

Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings. These descriptions are not intended to limit the present invention to specific embodiments, and should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. In describing each drawing, like reference numerals are used for similar components, and unless otherwise defined, all terms used in this specification, including technical or scientific terms, refer to those of ordinary skill in the art to which the present invention belongs. It has the same meaning as is commonly understood by those who have it.

In this document, when a part "includes" a certain component, it means that other components may be further included, rather than excluding other components, unless otherwise stated. In addition, in various embodiments of the present invention, each of the components, functional blocks or means may be composed of one or more sub-components, and the electrical, electronic, and mechanical functions performed by each component are electronic. A circuit, an integrated circuit, an ASIC (Application Specific Integrated Circuit), etc. may be implemented with various well-known devices or mechanical elements, and may be implemented separately or two or more may be integrated into one.

On the other hand, the blocks in the accompanying block diagram or steps in the flowchart are computer program instructions that are loaded in a processor or memory of equipment capable of data processing, such as a general-purpose computer, a special-purpose computer, a portable notebook computer, and a network computer, and perform specified functions. can be interpreted as meaning Since these computer program instructions may be stored in a memory provided in a computer device or in a memory readable by a computer, the functions described in the blocks of the block diagram or the steps of the flowchart are produced in an article containing instruction means for performing the same. it might be In addition, each block or each step may represent a module, segment, or portion of code comprising one or more executable instructions for executing the specified logical function(s). It should also be noted that, in some alternative embodiments, it is possible for the functions recited in blocks or steps to be executed out of the prescribed order. For example, two blocks or steps shown one after another may be performed substantially simultaneously or in the reverse order, and in some cases, some blocks or steps may be omitted.

1 is a diagram illustrating the structure of an electronic contract processing server for processing an electronic contract between parties according to an embodiment of the present invention.

Referring to FIG. 1 , the electronic contract processing server 110 according to an embodiment of the present invention includes a public key storage unit 111 , a confirmation request unit 112 , a first signature request unit 113 , and a first decryption unit. 114 , a second signature requesting unit 115 , a second decrypting unit 116 , a message generating unit 117 , and a message transmitting unit 118 .

First, the first private key for electronic signature is pre-stored in the first electronic terminal 130 held by the first user, and the second electronic terminal 140 held by the second user has the electronic signature for electronic signature. A second private key is pre-stored.

At this time, in the public key storage unit 111 , the first public key corresponding to the first private key stored in advance in the first electronic terminal 130 and the first public key previously stored in the second electronic terminal 140 . 2 A second public key corresponding to the private key is stored.

In this situation, as a predetermined electronic contract including contract information for an electronic contract between the first user and the second user is generated in the first electronic terminal 130 by the first user, the first electronic terminal As the electronic contract is received from 130 to the electronic contract processing server 110, when an electronic contract proceeding request requesting to proceed with the electronic contract with the second user is received, the confirmation request unit 112 is a second electronic contract While transmitting the electronic contract to the terminal 140 , a confirmation request message instructing to check the contents of the electronic contract is transmitted.

Here, the electronic contract means a predetermined electronic document including contract information related to a contract to be concluded between the first user and the second user.

In this way, while the electronic contract is transmitted from the electronic contract processing server 110 to the second electronic terminal 140, when a confirmation request message instructing to check the contents of the electronic contract is transmitted, the second user If it is confirmed that there is no abnormality after checking whether there is an abnormality in the contents of the electronic contract received at the terminal 140 , the contents of the electronic contract are transmitted to the electronic contract processing server 110 using the second electronic terminal 140 . A feedback message indicating that this has been confirmed may be transmitted.

In this way, when a feedback message indicating that the content of the electronic contract has been confirmed by the second user is received from the second electronic terminal 140 to the electronic contract processing server 110, the first signature requesting unit 113 is 1 The electronic terminal 130 requests an electronic signature based on the data for the electronic contract.

At this time, when the electronic signature request for the electronic contract is received from the electronic contract processing server 110 , the first electronic terminal 130 stores the data for the electronic contract in the first electronic terminal 130 . The first digital signature value may be generated by encryption with the first private key. Thereafter, the first electronic terminal 130 may transmit the first electronic signature value to the electronic contract processing server 110 .

In this way, in the first electronic terminal 130 , the data for the electronic contract is encrypted with the first private key stored in the first electronic terminal 130 to generate the first electronic signature value, the first electronic terminal When the first electronic signature value from 130 is received by the electronic contract processing server 110 , the first decryption unit 114 extracts the first public key from the public key storage unit 111 and then the first public key A first decrypted value is generated by decrypting the first digital signature value with a key.

Then, the second signature requesting unit 115 checks whether the first decryption value matches the data for the electronic contract, and if it is confirmed that the first decryption value matches the data for the electronic contract , verification of the first digital signature value may be completed.

Thereafter, the second signature requesting unit 115 requests, to the second electronic terminal 140 , an electronic signature based on data on the electronic contract.

At this time, when the electronic signature request for the electronic contract is received from the electronic contract processing server 110 , the second electronic terminal 140 stores the data for the electronic contract in the second electronic terminal 140 . A second digital signature value may be generated by encryption with the second private key. Then, the second electronic terminal 140 may transmit the second electronic signature value to the electronic contract processing server 110 .

In this way, in the second electronic terminal 140 , the data on the electronic contract is encrypted with the second private key stored in the second electronic terminal 140 to generate the second electronic signature value, the second electronic terminal When the second digital signature value from 140 is received by the electronic contract processing server 110 , the second decryption unit 116 extracts the second public key from the public key storage unit 111 and then the second public key A second decrypted value is generated by decrypting the second digital signature value with a key.

Thereafter, the message generating unit 117 checks whether the second decryption value matches the data for the electronic contract, and if it is confirmed that the second decryption value matches the data for the electronic contract, the Verification of the second digital signature value is completed, and a contract completion message indicating that the contract between the first user and the second user is completed is generated.

In this way, when the contract completion message is generated, the message transmission unit 118 transmits the contract completion message to the first electronic terminal 130 and the second electronic terminal 140 .

That is, the electronic contract processing server 110 according to the present invention requests to proceed with the electronic contract with the second user while receiving the electronic contract generated in the first electronic terminal 130 from the first electronic terminal 130 . When the electronic contract progress request is received, while transmitting the electronic contract to the second electronic terminal 140 , a confirmation request message instructing to check the contents of the electronic contract is transmitted, and the second electronic terminal 140 sends the When a feedback message indicating that the contents of the electronic contract has been confirmed is received, an electronic signature is requested to the first electronic terminal 130 , and the private key stored in the first electronic terminal 130 from the first electronic terminal 130 is received. When the signed electronic signature value is received, after verifying the electronic signature value with the public key corresponding to the corresponding private key, an electronic signature is requested from the second electronic terminal 140 , and the second electronic signature is received from the second electronic terminal 140 . When the digital signature value signed with the private key stored in the terminal 140 is received, the signature verification operation for both the first user and the second user by verifying the digital signature value with the public key corresponding to the private key When the signature verification operation is completed, a contract completion message indicating that the electronic contract has been completed is generated and transmitted to the first electronic terminal 130 and the second electronic terminal 140 , so that the first user and the It is possible to support the second user to more easily proceed with the electronic contract under the enhanced security authentication environment.

According to an embodiment of the present invention, the electronic contract processing server 110 may further include an identification number generation unit 119 , a token calculation unit 120 , a storage processing unit 121 , and a transmission unit 123 .

The identification number generator 119 is the first electronic terminal 130 and the second electronic terminal 140, and when the contract completion message is transmitted, n (n is a natural number greater than or equal to 2) for use in the verification of the electronic contract. A digit primary identification number and k (k is a natural number greater than or equal to 2) digit secondary identification number are randomly generated.

The token calculator 120 generates an authentication token when a first primary identification number is randomly generated as the n-digit primary identification number, and a first secondary identification number is randomly generated as the k-digit secondary identification number. A first authentication token is calculated by applying the first main identification number and the first auxiliary identification number as inputs to a preset token generating function for

At this time, according to an embodiment of the present invention, when the first main identification number and the first auxiliary identification number are applied as inputs, the token generation function uses n numbers constituting the first main identification number as components. After generating an arithmetic matrix having a size of n x k by calculating a Kronecker product between a column vector and a row vector having k numbers constituting the first auxiliary identification number as components, the Euclidean norm of the arithmetic matrix (Euclidean Norm) may be a function for calculating the first authentication token.

Here, the Euclidean norm is an L2 norm for indicating the size of a vector or matrix, and may be calculated according to Equation 1 below.

는 유클리드 노름을 의미하고, x_i는 벡터나 행렬에 포함되어 있는 i번째 성분을 의미한다.In Equation 1 above

denotes the Euclidean norm, and x _i denotes the i-th component included in a vector or matrix.

In addition, the Kronecker product refers to a matrix that specifically expresses the tensor product of two matrices, and when a matrix M of m x n as in Equation 2 below and a matrix N of p x q as in Equation 3 below are given, the matrix The Kronecker product between M and the matrix N can be expressed as Equation 4 below.

When the first authentication token is calculated, the storage processing unit 121 stores the first auxiliary identification number and the first authentication token in correspondence with each other in the contract history database 122 .

When the transmission unit 123 stores the first auxiliary identification number and the first authentication token in correspondence with the contract history database 122, the first main identification number and data for the first authentication token are included. After generating a two-dimensional code and inserting the two-dimensional code into the electronic contract as an image, the electronic contract into which the two-dimensional code is inserted is transmitted to the first electronic terminal 130 and the second electronic terminal 140 do.

Here, the two-dimensional code refers to a code capable of inserting information such as various characters on a two-dimensional image pattern, and a QR code (Quick Response Code), veri code, dot code, etc. are used, A digital code or the like capable of expressing predetermined data on a two-dimensional image through a pixel space composed of a plurality of dots disclosed in Korean Patent No. 10-1897960 may be used. In this regard, the illustrated figure of FIG. 2 shows that the digital code 211 capable of expressing predetermined data on a two-dimensional image through a pixel space composed of a plurality of yellow dots on the surface of the electronic contract 210 is the two-dimensional An example that is inserted into the code is shown. As shown in reference numeral 211, this digital code is composed of yellow dots, so when contrasted with a white background, the color contrast is not clear, so it is difficult to clearly observe with the naked eye, but the electronic terminal In that the camera can perform the identification of the yellow dot differently from the human eye, the pattern of the yellow dot can be clearly identified through the electronic terminal.

Hereinafter, operations of the identification number generating unit 119 , the token calculating unit 120 , the storage processing unit 121 , and the transmitting unit 123 will be described in detail as an example.

First, when the contract completion message is transmitted to the first electronic terminal 130 and the second electronic terminal 140 , the identification number generator 119 provides an n-digit main identification number for use in verification of the electronic contract. and a k-digit auxiliary identification number may be randomly generated.

In relation to this, when 'n = 5' and 'k = 6', the identification number generation unit 119 randomly generates a 5-digit primary identification number and a 6-digit auxiliary identification number for use in the verification of the electronic contract. can be created

'과 상기 제1 보조 식별번호인 '123321'을 구성하는 6개의 숫자들을 성분으로 갖는 행벡터인 '

' 간의 크로네커 곱을 상기 수학식 2 내지 4에 따라 연산하여 5 x 6의 크기를 갖는 연산 행렬인 '

'을 생성할 수 있다.If, by the identification number generating unit 119, the first main identification number of '32123' of 5 digits is randomly generated, and that the first auxiliary identification number of '123321' of 6 digits is randomly generated In this case, the token calculation unit 120 applies the first main identification number '32123' and the first auxiliary identification number '123321' to the token generation function as inputs, and the first main identification number '32123'', which is a column vector with five numbers constituting '

' and ', which is a row vector having six numbers constituting '123321', which is the first auxiliary identification number, as components.

' is an operation matrix having a size of 5 x 6 by calculating the Kronecker product between ' according to Equations 2 to 4

' can be created.

Then, the token calculation unit 120 calculates the Euclidean norm of the operation matrix as '27.49' according to Equation 1, and then calculates '27.49', the Euclidean norm of the operation matrix, as the first authentication token. can

In this way, when the first authentication token is calculated by the token calculation unit 120, the storage processing unit 121 stores the first auxiliary identification number '123321' and The first authentication token '27.49' may be stored in correspondence with each other.

first auxiliary identification number first authentication token 123321 27.49

In this way, when the first auxiliary identification number and the first authentication token are stored in correspondence with the contract history database 122 by the storage processing unit 121, the transmission unit 123 is the first main identification number '32123' ' and a two-dimensional code including data for '27.49', which is the first authentication token, is generated, and the two-dimensional code is inserted as an image in the electronic contract, and then the electronic contract into which the two-dimensional code is inserted It may transmit to the first electronic terminal 130 and the second electronic terminal 140 .

According to an embodiment of the present invention, the electronic contract processing server 110 may further include a transaction generating unit 124 and a registration requesting unit 125 .

When the electronic contract into which the two-dimensional code is inserted is transmitted to the first electronic terminal 130 and the second electronic terminal 140 , the transaction generating unit 124 includes the electronic contract, the first electronic signature value, and the second electronic contract. 2 Create a transaction including the digital signature value, the first auxiliary identification number, and the first authentication token.

The registration request unit 125 randomly selects a first node device that is any one of a plurality of node devices 101, 102, 103, and 104 constituting the block chain network, and then sends the transaction to the first node device. sending a registration request to the blockchain network of the transaction.

At this time, when the registration request is received with the transaction from the electronic contract processing server 110, the first node device includes the transaction based on the previous block chained to the block chain data stored in the memory. By creating a first block and linking the first block to the block chain data in a chain, the first block is transferred to a plurality of node devices ( It is possible to propagate to the remaining node devices except for the first node device among 101, 102, 103, and 104).

Specifically, when the first node device receives the registration request together with the transaction from the electronic contract processing server 110, the transaction is included by referring to the block header of the previous block connected to the block chain data in a chain. The first block, which is a new block that has been created, may be generated. Then, the first node device connects the first block to the blockchain data in a chain, so that after the storage of the first block is completed, the first block is transferred to a plurality of node devices through the blockchain network. It is possible to propagate to other node devices other than the first node device among the ones 101 , 102 , 103 , and 104 .

In this way, the electronic contract processing server 110 according to the present invention transmits the electronic contract into which the two-dimensional code is inserted to the first electronic terminal 130 and the second electronic terminal 140, the electronic contract, the second electronic contract By registering one electronic signature value, the second electronic signature value, the first auxiliary identification number, and the first authentication token in a blockchain network, the integrity of the electronic contract between the first user and the second user is maintained. can guarantee

According to an embodiment of the present invention, the electronic contract processing server 110 further includes an instruction message transmission unit 126 , an auxiliary identification number extraction unit 127 , a token verification unit 128 and a completion message transmission unit 129 . may include

The instruction message transmitting unit 126 transmits the electronic contract into which the two-dimensional code is inserted to the first electronic terminal 130 and the second electronic terminal 140 , and then the first electronic terminal 130 and the second electronic terminal 140 . A paper document for the electronic contract (herein, the paper document means a document in which the electronic contract is printed on paper) from any one electronic terminal of the terminal 140 is transmitted between the first user and the second user When a verification processing request to verify whether the contract document according to the electronic contract is correct is received, a code scan instruction message is generated instructing to scan the two-dimensional code inserted in the paper document, transmitted to the terminal.

As the auxiliary identification number extraction unit 127 scans and recognizes the two-dimensional code inserted into the paper document in the one electronic terminal after the code scan instruction message is transmitted to the one electronic terminal, When the first main identification number and the first authentication token extracted through the two-dimensional code inserted into the paper document are received from the one electronic terminal, the first authentication token from the contract history database 122 Extracts the auxiliary identification number stored in correspondence with the same authentication token as .

The token confirmation unit 128 is an auxiliary identification number stored in correspondence with the same authentication token as the first authentication token from the contract history database 122. When the first auxiliary identification number is extracted, the token generation function is , the calculation result calculated when the first main identification number received from the one electronic terminal and the first auxiliary identification number extracted from the contract history database 122 is applied as an input, the first authentication token is check whether or not

When it is confirmed that the operation result is the first authentication token, the completion message transmitting unit 129 performs verification processing indicating that the paper document is a contract document according to the electronic contract between the first user and the second user. A completion message is generated and transmitted to any one of the electronic terminals.

Hereinafter, operations of the instruction message transmission unit 126, the auxiliary identification number extraction unit 127, the token verification unit 128, and the completion message transmission unit 129 will be described in detail as an example.

First, as in the above example, after the electronic contract into which the two-dimensional code is inserted is transmitted to the first electronic terminal 130 and the second electronic terminal 140 , the first electronic terminal 130 and the second electronic terminal A verification processing request requesting to verify whether the paper document for the electronic contract is a contract document according to the electronic contract between the first user and the second user from any one electronic terminal of the terminal 140 is electronically Assume that it has been received by the contract processing server 110 .

Then, the instruction message transmitting unit 126 may generate a code scan instruction message instructing to scan the two-dimensional code inserted into the paper document and transmit it to any one of the electronic terminals.

In this way, after the code scan instruction message is transmitted to the one electronic terminal by the instruction message transmitting unit 126, the two-dimensional code inserted into the paper document is scanned and recognized in the one electronic terminal Accordingly, when '32123', which is the first main identification number extracted through the two-dimensional code inserted into the paper document, and '27.49', which is the first authentication token, are received from the one electronic terminal, auxiliary The identification number extraction unit 127 may extract an auxiliary identification number stored in correspondence with the same authentication token as '27.49', which is the first authentication token, from the contract history database 122 as shown in Table 1 above.

At this time, by the auxiliary identification number extraction unit 127, from the contract history database 122 as shown in Table 1, the auxiliary identification number stored in correspondence to the same authentication token as '27.49', which is the first authentication token, When it is said that the first auxiliary identification number of '123321' is extracted, the token confirmation unit 128 provides the token generation function with '32123' and the first main identification number received from the one electronic terminal. It can be checked whether the calculation result calculated when the first auxiliary identification number '123321' extracted from the contract history database 122 as shown in Table 1 is applied as an input becomes '27.49', which is the first authentication token. have.

If it is confirmed by the token verification unit 128 that the operation result is '27.49', which is the first authentication token, the first main identification number received from the one electronic terminal and the first Since it means that the information extracted from the two-dimensional code issued normally by the authentication token is correct, the completion message transmitting unit 129 determines that the paper document is a contract document according to the electronic contract between the first user and the second user. A verification process completion message indicating a can be generated and transmitted to any one of the electronic terminals.

At this time, according to an embodiment of the present invention, when the verification processing completion message is received from the electronic contract processing server 110, the one electronic terminal may output the verification processing completion message as text on the screen, , after synthesizing the verification process completion message into voice using a predetermined voice synthesis model, the voice may be output to the speaker. Through this, the user can easily confirm that the paper document is a contract document according to an electronic contract between the parties.

3 is a flowchart illustrating an operation method of an electronic contract processing server for processing an electronic contract between parties according to an embodiment of the present invention.

In step S310, the first public key corresponding to the first private key pre-stored in the first electronic terminal held by the first user, and the first public key pre-stored in the second electronic terminal held by the second user A public key storage unit in which a second public key corresponding to the second private key is stored is maintained.

In step S320, while receiving the electronic contract generated in the first electronic terminal from the first electronic terminal, when an electronic contract progress request requesting to proceed with the electronic contract with the second user is received, the second electronic contract While transmitting the electronic contract to the terminal, a confirmation request message instructing to check the contents of the electronic contract is transmitted.

In step S330, when a feedback message indicating that the content of the electronic contract has been confirmed by the second user is received from the second electronic terminal, the first electronic terminal receives data on the electronic contract based on the Request an electronic signature.

In step S340, as the data for the electronic contract is encrypted with the first private key stored in the first electronic terminal to generate a first electronic signature value, the first electronic signature value from the first electronic terminal When this is received, after extracting the first public key from the public key storage unit, the first digital signature value is decrypted with the first public key to generate a first decrypted value.

In step S350, when the first decrypted value is generated, it is checked whether the first decrypted value matches the data for the electronic contract, and the first decrypted value matches the data for the electronic contract. Upon confirmation, verification of the first electronic signature value is completed, and an electronic signature based on data on the electronic contract is requested from the second electronic terminal.

In step S360, as the data for the electronic contract is encrypted with the second private key stored in the second electronic terminal to generate a second electronic signature value, the second electronic signature value from the second electronic terminal When this is received, after extracting the second public key from the public key storage unit, the second digital signature value is decrypted with the second public key to generate a second decryption value.

In step S370, when the second decryption value is generated, it is checked whether the second decrypted value matches the data for the electronic contract, and it is determined that the second decrypted value matches the data for the electronic contract. Upon confirmation, verification of the second electronic signature value is completed, and a contract completion message indicating that the contract between the first user and the second user is completed is generated.

In step S380, the contract completion message is transmitted to the first electronic terminal and the second electronic terminal.

At this time, according to an embodiment of the present invention, the method of operation of the electronic contract processing server is for use in verification of the electronic contract when the contract completion message is transmitted to the first electronic terminal and the second electronic terminal. Randomly generating n (n is a natural number of 2 or more) digit primary identification number and k (k is a natural number of 2 or more) digit secondary identification number, the first primary identification number is randomly generated as the n digit primary identification number When the first auxiliary identification number is randomly generated as the k-digit auxiliary identification number, the first main identification number and the first auxiliary identification number are input to a preset token generation function for generating an authentication token. Calculating a first authentication token by applying, when the first authentication token is calculated, storing the first auxiliary identification number and the first authentication token in a contract history database in correspondence with each other, and in the contract history database When the first auxiliary identification number and the first authentication token are stored in correspondence with each other, a two-dimensional code including data for the first main identification number and the first authentication token is generated, and the two-dimensional code is stored in the electronic contract. After inserting the code as an image, the method may further include transmitting the electronic contract into which the two-dimensional code is inserted to the first electronic terminal and the second electronic terminal.

At this time, according to an embodiment of the present invention, when the first main identification number and the first auxiliary identification number are applied as inputs, the token generation function uses n numbers constituting the first main identification number as components. After generating an arithmetic matrix having a size of n x k by calculating a Kronecker product between a column vector having a column vector and a row vector having k numbers constituting the first auxiliary identification number as a component, the Euclidean norm of the arithmetic matrix is used for the first authentication It may be a function that produces a token.

In addition, according to an embodiment of the present invention, in the method of operating the electronic contract processing server, when the electronic contract into which the two-dimensional code is inserted is transmitted to the first electronic terminal and the second electronic terminal, the electronic contract; generating a transaction including the first electronic signature value, the second electronic signature value, the first auxiliary identification number, and the first authentication token, and when the transaction is generated, a plurality of The method may further include: after randomly selecting a first node device, which is one of the node devices, and transmitting the transaction to the first node device, sending a registration request of the transaction to the blockchain network. .

At this time, when the registration request is received together with the transaction from the electronic contract processing server, the first node device includes the first transaction including the transaction based on the previous block chained to the block chain data stored in the memory. By creating a block and chaining the first block to the block chain data, after completing the storage of the first block, the first block is transferred to the one of the plurality of node devices through the block chain network. It can propagate to other node devices except for the first node device.

In addition, according to an embodiment of the present invention, in the method of operating the electronic contract processing server, after the electronic contract into which the two-dimensional code is inserted is transmitted to the first electronic terminal and the second electronic terminal, the first From an electronic terminal of any one of the electronic terminal and the second electronic terminal, a paper document for the electronic contract (the paper document is a document in which the electronic contract is printed on paper) is transmitted between the first user and the second user When a verification processing request to verify whether the contract document according to the electronic contract is correct is received, a code scan instruction message is generated instructing to scan the two-dimensional code inserted in the paper document, Transmitting to a terminal, after the code scan instruction message is transmitted to any one of the electronic terminals, as the two-dimensional code inserted into the paper document is scanned and recognized in the one electronic terminal, any one of the When the first main identification number and the first authentication token extracted through the two-dimensional code inserted into the paper document are received from the electronic terminal of extracting a correspondingly stored auxiliary identification number, from the contract history database, to an auxiliary identification number stored in correspondence with the same authentication token as the first authentication token, when the first auxiliary identification number is extracted, the The calculation result calculated when the first main identification number received from the one electronic terminal and the first auxiliary identification number extracted from the contract history database is applied to the token generation function as inputs is the first authentication Checking whether the token is a token or not, and when it is confirmed that the operation result becomes the first authentication token, verifying that the paper document is a contract document according to an electronic contract between the first user and the second user is correct The step of generating a processing completion message and transmitting it to any one of the electronic terminals may include

In the above, an operation method of the electronic contract processing server according to an embodiment of the present invention has been described with reference to FIG. 3 . Here, the method of operation of the electronic contract processing server according to an embodiment of the present invention may correspond to the configuration of the operation of the electronic contract processing server 110 described with reference to FIGS. 1 and 2 , so a more detailed description thereof is to be omitted.

The operating method of the electronic contract processing server for processing an electronic contract between parties according to an embodiment of the present invention may be implemented as a computer program stored in a storage medium for execution through combination with a computer.

In addition, the operating method of the electronic contract processing server for processing the electronic contract between the parties in an embodiment of the present invention may be implemented in the form of a computer program instruction for execution through combination with a computer and recorded in a computer readable medium. The computer-readable medium may include program instructions, data files, data structures, etc. alone or in combination. The program instructions recorded on the medium may be specially designed and configured for the present invention, or may be known and available to those skilled in the art of computer software. Examples of the computer-readable recording medium include magnetic media such as hard disks, floppy disks and magnetic tapes, optical media such as CD-ROMs and DVDs, and magnetic such as floppy disks. - includes magneto-optical media, and hardware devices specially configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like. Examples of program instructions include not only machine language codes such as those generated by a compiler, but also high-level language codes that can be executed by a computer using an interpreter or the like.

As described above, in the present invention, specific matters such as specific components, etc., and limited embodiments and drawings have been described, but these are only provided to help a more general understanding of the present invention, and the present invention is not limited to the above embodiments. , various modifications and variations are possible from these descriptions by those of ordinary skill in the art to which the present invention pertains.

Therefore, the spirit of the present invention should not be limited to the described embodiments, and not only the claims described below, but also all those with equivalent or equivalent modifications to the claims will be said to belong to the scope of the spirit of the present invention. .

110: an electronic contract processing server for processing an electronic contract between the parties
111: public key storage unit 112: confirmation request unit
113: first signature request unit 114: first decryption unit
115: second signature request unit 116: second decryption unit
117: message generating unit 118: message transmitting unit
119: identification number generation unit 120: token calculation unit
121: storage processing unit 122: contract history database
123: transmission unit 124: transaction generation unit
125: registration request unit 126: instruction message transmission unit
127: auxiliary identification number extraction unit 128: token verification unit
129: completion message sending unit
130: first electronic terminal
140: second electronic terminal

Claims (12)

An electronic contract processing server for processing an electronic contract between parties,
The first public key corresponding to the first private key pre-stored in the first electronic terminal held by the first user and the second private key pre-stored in the second electronic terminal held by the second user a public key storage unit storing a corresponding second public key;
When the electronic contract generated in the first electronic terminal is received from the first electronic terminal and an electronic contract proceeding request requesting to proceed with the electronic contract with the second user is received, the second electronic terminal is sent to the electronic a confirmation request unit for transmitting a confirmation request message instructing to confirm the contents of the electronic contract while transmitting the contract;
When a feedback message indicating that the content of the electronic contract has been confirmed by the second user is received from the second electronic terminal, the first electronic terminal requests an electronic signature based on data on the electronic contract a first signature request unit;
As the data for the electronic contract is encrypted with the first private key stored in the first electronic terminal to generate a first electronic signature value, when the first electronic signature value is received from the first electronic terminal, the a first decryption unit for extracting the first public key from a public key storage unit and then decrypting the first digital signature value with the first public key to generate a first decryption value;
When the first decryption value is generated, it is checked whether the first decryption value matches the data for the electronic contract, and if it is confirmed that the first decrypted value matches the data for the electronic contract, the first decryption value a second signature requesting unit that completes verification of the first electronic signature value and requests, to the second electronic terminal, an electronic signature based on data on the electronic contract;
As the data for the electronic contract is encrypted with the second private key stored in the second electronic terminal to generate a second electronic signature value, when the second electronic signature value is received from the second electronic terminal, the a second decryption unit for extracting the second public key from the public key storage unit and then decrypting the second digital signature value with the second public key to generate a second decryption value;
When the second decryption value is generated, it is checked whether the second decryption value matches the data for the electronic contract, and if it is confirmed that the second decrypted value matches the data for the electronic contract, the second decryption value 2 A message generator for completing verification of the digital signature value and generating a contract completion message indicating that the contract between the first user and the second user has been completed; and
A message transmission unit for transmitting the contract completion message to the first electronic terminal and the second electronic terminal
Electronic contract processing server comprising a. According to claim 1,
When the contract completion message is transmitted to the first electronic terminal and the second electronic terminal, n (n is a natural number of 2 or more) digit main identification number and k (k is 2 or more) for use in verification of the electronic contract a natural number) an identification number generator for randomly generating a digit auxiliary identification number;
When the first primary identification number is randomly generated with the n-digit primary identification number, and the first secondary identification number is randomly generated with the k-digit secondary identification number, in a preset token generation function for generating an authentication token a token calculator for calculating a first authentication token by applying the first main identification number and the first auxiliary identification number as inputs;
a storage processing unit for storing the first auxiliary identification number and the first authentication token in correspondence with each other in a contract history database when the first authentication token is calculated; and
When the first auxiliary identification number and the first authentication token are stored in correspondence with each other in the contract history database, a two-dimensional code including data about the first main identification number and the first authentication token is generated, and the After inserting the two-dimensional code into the electronic contract as an image, a transmission unit for transmitting the electronic contract into which the two-dimensional code is inserted to the first electronic terminal and the second electronic terminal
Electronic contract processing server further comprising a. 3. The method of claim 2,
The token generation function is
When the first main identification number and the first auxiliary identification number are applied as inputs, a column vector including n numbers constituting the first main identification number as components and k numbers constituting the first auxiliary identification number After generating an operation matrix having a size of nxk by calculating a Kronecker product between row vectors having Characterized by the electronic contract processing server. 3. The method of claim 2,
When the electronic contract into which the two-dimensional code is inserted is transmitted to the first electronic terminal and the second electronic terminal, the electronic contract, the first electronic signature value, the second electronic signature value, and the first auxiliary identification number and a transaction generator for generating a transaction including the first authentication token; and
When the transaction is generated, a first node device, which is any one of a plurality of node devices constituting the block chain network, is randomly selected, and then the transaction is transmitted to the first node device, and the block chain of the transaction is A registration requesting unit that sends a registration request to the network
further comprising,
The first node device
When the registration request is received with the transaction from the electronic contract processing server, a first block including the transaction is generated based on a previous block chained to the block chain data stored in the memory, and the first block is generated. By chaining a block to the block chain data, after the storage of the first block is completed, the first block is transferred through the block chain network to the remaining nodes except for the first node device among the plurality of node devices. An electronic contract processing server, characterized in that it propagates to devices. 3. The method of claim 2,
After the electronic contract into which the two-dimensional code is inserted is transmitted to the first electronic terminal and the second electronic terminal, from any one of the first electronic terminal and the second electronic terminal, to the electronic contract A verification processing request requesting to verify whether the paper document for the document - the paper document is a document in which the electronic contract is printed on paper - is a contract document according to the electronic contract between the first user and the second user is received; an instruction message transmission unit for generating a code scan instruction message instructing to scan the two-dimensional code inserted into the paper document and transmitting it to the one of the electronic terminals;
After the code scan instruction message is transmitted to the one electronic terminal, as the two-dimensional code inserted into the paper document is scanned and recognized by the one electronic terminal, from the one electronic terminal, the When the first main identification number and the first authentication token extracted through the two-dimensional code inserted into the paper document are received, the auxiliary stored in correspondence with the same authentication token as the first authentication token from the contract history database Auxiliary identification number extraction unit for extracting the identification number;
When the first auxiliary identification number is extracted from the contract history database as an auxiliary identification number stored in correspondence to the same authentication token as the first authentication token, the token generation function receives from the one of the electronic terminals a token confirmation unit that confirms whether an operation result calculated when the first main identification number and the first auxiliary identification number extracted from the contract history database are applied as inputs is the first authentication token; and
When it is confirmed that the operation result becomes the first authentication token, a verification processing completion message is generated indicating that the paper document is a contract document according to the electronic contract between the first user and the second user is correct. Completion message transmission unit to transmit to the electronic terminal of
Electronic contract processing server further comprising a. In the operating method of an electronic contract processing server for processing an electronic contract between parties,
The first public key corresponding to the first private key pre-stored in the first electronic terminal held by the first user and the second private key pre-stored in the second electronic terminal held by the second user maintaining a public key storage unit in which a corresponding second public key is stored;
When the electronic contract generated in the first electronic terminal is received from the first electronic terminal and an electronic contract proceeding request requesting to proceed with the electronic contract with the second user is received, the second electronic terminal is sent to the electronic transmitting a confirmation request message instructing to confirm the contents of the electronic contract while transmitting the contract;
When a feedback message indicating that the content of the electronic contract has been confirmed by the second user is received from the second electronic terminal, the first electronic terminal requests an electronic signature based on data on the electronic contract step;
As the data for the electronic contract is encrypted with the first private key stored in the first electronic terminal to generate a first electronic signature value, when the first electronic signature value is received from the first electronic terminal, the generating a first decryption value by extracting the first public key from a public key storage unit and then decrypting the first digital signature value with the first public key;
When the first decryption value is generated, it is checked whether the first decryption value matches the data for the electronic contract, and if it is confirmed that the first decrypted value matches the data for the electronic contract, the first decryption value 1 Completing verification of the electronic signature value, and requesting, to the second electronic terminal, an electronic signature based on data for the electronic contract;
As the data for the electronic contract is encrypted with the second private key stored in the second electronic terminal to generate a second electronic signature value, when the second electronic signature value is received from the second electronic terminal, the generating a second decryption value by extracting the second public key from a public key storage unit and then decrypting the second digital signature value with the second public key;
When the second decrypted value is generated, it is checked whether the second decrypted value matches the data for the electronic contract, and if it is confirmed that the second decrypted value is consistent with the data for the electronic contract, the second decrypted value 2 Completing verification of the electronic signature value and generating a contract completion message indicating that the contract between the first user and the second user is completed; and
transmitting the contract completion message to the first electronic terminal and the second electronic terminal
An operating method of an electronic contract processing server comprising a. 7. The method of claim 6,
When the contract completion message is transmitted to the first electronic terminal and the second electronic terminal, n (n is a natural number of 2 or more) digit main identification number and k (k is 2 or more) for use in verification of the electronic contract Natural number) randomly generating a digit auxiliary identification number;
When the first primary identification number is randomly generated with the n-digit primary identification number, and the first secondary identification number is randomly generated with the k-digit secondary identification number, in a preset token generation function for generating an authentication token calculating a first authentication token by applying the first main identification number and the first auxiliary identification number as inputs;
when the first authentication token is calculated, storing the first auxiliary identification number and the first authentication token to correspond to each other in a contract history database; and
When the first auxiliary identification number and the first authentication token are stored in correspondence with each other in the contract history database, a two-dimensional code including data about the first main identification number and the first authentication token is generated, and the After inserting the two-dimensional code into the electronic contract as an image, transmitting the electronic contract into which the two-dimensional code is inserted to the first electronic terminal and the second electronic terminal
Operating method of the electronic contract processing server further comprising a. 8. The method of claim 7,
The token generation function is
When the first main identification number and the first auxiliary identification number are applied as inputs, a column vector including n numbers constituting the first main identification number as components and k numbers constituting the first auxiliary identification number After generating an operation matrix having a size of nxk by calculating a Kronecker product between row vectors having An operating method of the electronic contract processing server, characterized in that. 8. The method of claim 7,
When the electronic contract into which the two-dimensional code is inserted is transmitted to the first electronic terminal and the second electronic terminal, the electronic contract, the first electronic signature value, the second electronic signature value, and the first auxiliary identification number and generating a transaction including the first authentication token; and
When the transaction is generated, a first node device, which is any one of a plurality of node devices constituting the block chain network, is randomly selected, and then the transaction is transmitted to the first node device, and the block chain of the transaction is sending a registration request to the network
further comprising,
The first node device
When the registration request is received with the transaction from the electronic contract processing server, a first block including the transaction is generated based on a previous block chained to the block chain data stored in the memory, and the first block is generated. By chaining a block to the block chain data, after the storage of the first block is completed, the first block is transferred through the block chain network to the remaining nodes except for the first node device among the plurality of node devices. A method of operation of an electronic contract processing server, characterized in that it propagates to devices. 8. The method of claim 7,
After the electronic contract into which the two-dimensional code is inserted is transmitted to the first electronic terminal and the second electronic terminal, from any one of the first electronic terminal and the second electronic terminal, to the electronic contract A verification processing request requesting to verify whether the paper document for the document - the paper document is a document in which the electronic contract is printed on paper - is a contract document according to the electronic contract between the first user and the second user is received; generating a code scan instruction message instructing to scan the two-dimensional code inserted into the paper document, and transmitting it to the one electronic terminal;
After the code scan instruction message is transmitted to the one electronic terminal, as the two-dimensional code inserted into the paper document is scanned and recognized by the one electronic terminal, from the one electronic terminal, the When the first main identification number and the first authentication token extracted through the two-dimensional code inserted into the paper document are received, the auxiliary stored in correspondence with the same authentication token as the first authentication token from the contract history database extracting an identification number;
When the first auxiliary identification number is extracted from the contract history database as an auxiliary identification number stored in correspondence to the same authentication token as the first authentication token, the token generation function receives from the one of the electronic terminals checking whether the calculation result calculated when the first main identification number and the first auxiliary identification number extracted from the contract history database are applied as inputs becomes the first authentication token; and
When it is confirmed that the operation result becomes the first authentication token, a verification processing completion message is generated indicating that the paper document is a contract document according to the electronic contract between the first user and the second user is correct. sending to the electronic terminal of
Operating method of the electronic contract processing server further comprising a. A computer-readable recording medium recording a computer program for executing the method of any one of claims 6 to 10 through combination with a computer. A computer program stored in a storage medium for executing the method of any one of claims 6 to 10 through combination with a computer.

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