KR102574296B1 - 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 supports electronic contracts between parties through a reliable protocol and at the same time supports verification of the authenticity of contracts based on a two-dimensional code in which predetermined information for authenticity verification is inserted. It is about a contract processing server and its operation method.

Description

Electronic contract processing server that processes electronic contracts between parties using two-dimensional codes and its operation method

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

Conventionally, when a contract is concluded between the parties, a predetermined contract containing contract information is prepared, and then the seal of the party concerned is stamped or signed. At this time, in order to guarantee the contents of the contract, a third party such as a notary intervened, and the contract was drawn up between the parties in front of the third party, and the contract was carried out in the form of signing the seal of the contracting party and the third party together on the contract. .

Recently, as the need for electronic contracts to conclude contracts between parties through online has increased, the demand for contract processing services that can support parties to conduct electronic contracts more easily and guarantee these electronic contracts is increasing. there is.

In this contract processing service, in that the process of verifying whether the contracting party is the true party intending to conclude a contract is necessarily included, it is confirmed whether the contracting party is the true party by using a predetermined electronic signature technology, Based on this, it is possible to consider introducing a contract processing service that supports electronic contracts between contracting parties.

In addition, after the electronic contract between the contracting parties is concluded, a new system that supports verifying whether the contract written between the contracting parties is genuine is needed.

In this regard, after generating a two-dimensional code in which predetermined information for verifying the authenticity of the contract is inserted, the two-dimensional code is inserted into the contract, so that the user who has signed the electronic contract can obtain the two-dimensional code inserted into the contract. When scanning with one's own electronic terminal, based on this two-dimensional code, it is possible to consider introducing a system that determines whether the contract is genuine or not.

Therefore, it is a system technology that supports electronic contracts between parties through reliable protocols and at the same time supports verifying the authenticity of contracts based on a two-dimensional code in which predetermined information for authenticity verification is inserted. research is needed

The present invention supports electronic contracts between parties through a reliable protocol and at the same time supports verification of the authenticity of contracts based on a two-dimensional code in which predetermined information for authenticity verification is inserted.

According to an embodiment of the present invention, an electronic contract processing server for processing an electronic contract between parties 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 pre-stored in a second electronic terminal possessed by a second user is stored, and 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 confirm 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 the second electronic terminal, the first electronic terminal transmits a confirmation request message to the electronic contract. A first signature requesting unit requesting an electronic signature based on data for the electronic contract, 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 first public key is extracted from the public key storage unit, and then the first electronic signature value is decrypted with the first public key to generate a first decryption value. A first decryption unit that, when the first decryption value is generated, checks whether the first decryption value matches the data for the electronic contract, and determines whether the first decryption value matches the data for the electronic contract. If confirmed, the second signature request unit for completing the 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, As data 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 public key storage unit A second decryption unit that extracts the second public key and decrypts the second digital signature value with the second public key to generate a second decryption value; when the second decryption value is generated, the second decryption value It is checked whether the data for the electronic contract matches each other, and if it is confirmed that the second decryption value matches the data for the electronic contract, verification of the second electronic signature value is completed, and the first user and and a message generating unit generating a contract completion message indicating that the contract between the second users has been completed and a message transmission unit transmitting the contract completion message to the first electronic terminal and the second electronic terminal.

In addition, according to an embodiment of the present invention, a method of operating an electronic contract processing server for processing an electronic contract between parties is a first private key corresponding to a first private key pre-stored in a first electronic terminal possessed by a first user. maintaining a public key storage unit storing a first public key and a second public key corresponding to a second private key previously stored in a second electronic terminal possessed by a second user, from the first electronic terminal When the electronic contract created in the first electronic terminal is received and an electronic contract progress request requesting to proceed with the electronic contract with the second user is received, while transmitting the electronic contract to the second electronic terminal, Transmitting a confirmation request message instructing to confirm the content of 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 the second electronic terminal, the first electronic terminal Requesting an electronic signature based on the data of the electronic contract, wherein the data of 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, the first public key is extracted from the public key storage unit, and then the first electronic signature value is decrypted with the first public key to obtain a first decryption value. Generating, when the first decryption value is generated, checking whether the first decryption value matches the data for the electronic contract, and determining whether the first decryption value matches the data for the electronic contract. If confirmed, completing the verification of the first electronic signature value and requesting an electronic signature based on the electronic contract data to the second electronic terminal; As the second electronic signature value is generated by being encrypted with the second private key stored in the electronic terminal, when the second electronic signature value is received from the second electronic terminal, the second public key from the public key storage unit. After extracting, decrypting the second electronic signature value with the second public key to generate a second decryption value, when the second decryption value is generated, the second decryption value coincides with the data for the electronic contract. and if it is confirmed that the second decryption value matches the data for the electronic contract, verification of the second electronic signature value is completed, and the contract between the first user and the second user is completed. generating a contract completion message indicating that the contract has been completed, and transmitting the contract completion message to the first electronic terminal and the second electronic terminal.

The present invention supports electronic contracts between parties through a reliable protocol and at the same time supports verifying the authenticity of a contract based on a two-dimensional code in which predetermined information for authenticity verification is inserted.

1 is a diagram showing the structure of an electronic contract processing server processing an electronic contract between parties according to an embodiment of the present invention.
2 is a diagram 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 operating method of an electronic contract processing server 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. This description is not intended to limit the present invention to specific embodiments, but should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. While describing each drawing, similar reference numerals have been used for similar components, and unless otherwise defined, all terms used in this specification, including technical or scientific terms, are common knowledge in the art to which the present invention belongs. has the same meaning as commonly understood by the person who has it.

In this document, when a certain component is said to "include", it means that it may further include other components without excluding other components unless otherwise stated. In addition, in various embodiments of the present invention, each component, functional block, or means may be composed of one or more sub-components, and the electrical, electronic, and mechanical functions performed by each component are electronic It may be implemented with various known elements or mechanical elements such as circuits, integrated circuits, ASICs (Application Specific Integrated Circuits), and may be implemented separately or two or more may be integrated into one.

On the other hand, the blocks of the accompanying block diagram or the steps of the flowchart are computer program instructions that perform designated functions by being loaded into a processor or memory of a device capable of data processing, such as a general-purpose computer, a special purpose computer, a portable notebook computer, and a network computer. can be interpreted as meaning Since these computer program instructions may be stored in a memory included in a computer device or in a computer readable memory, the functions described in blocks of a block diagram or steps of a flowchart are produced as a product containing instruction means for performing them. It could be. Further, each block or each step may represent a module, segment or portion of code that includes one or more executable instructions for executing specified logical function(s). Also, it should be noted that in some alternative embodiments, functions mentioned in blocks or steps may be executed out of a predetermined order. For example, two blocks or steps shown in succession may be performed substantially simultaneously or in reverse order, and in some cases, some blocks or steps may be omitted.

1 is a diagram showing the structure of an electronic contract processing server 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 decoding 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 possessed by the first user, and the second electronic terminal 140 possessed by the second user has a first private key for electronic signature. A second private key is pre-stored.

At this time, the public key storage unit 111 includes the first public key corresponding to the first private key previously stored in the first electronic terminal 130 and the first public key previously stored in the second electronic terminal 140. A second public key corresponding to the two private keys 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 130 When the electronic contract is received from the electronic contract processing server 110 from 130 and an electronic contract progress request requesting to proceed with the electronic contract with the second user is received, the confirmation request unit 112 sends the second electronic contract To the terminal 140, while transmitting the electronic contract, a confirmation request message instructing to check the contents of the electronic contract is transmitted.

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

In this way, when the electronic contract is transmitted from the electronic contract processing server 110 to the second electronic terminal 140 and a confirmation request message instructing to check the contents of the electronic contract is transmitted, the second user receives the second electronic contract. After checking whether or not there is an error in the contents of the electronic contract received by the terminal 140, if it is confirmed that there is no abnormality, the contents of the electronic contract are transferred 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 request unit 113 1 Requests an electronic signature based on the electronic contract data to the electronic terminal 130 .

At this time, the first electronic terminal 130 receives the electronic signature request for the electronic contract from the electronic contract processing server 110, the electronic contract data stored in the first electronic terminal 130 A first electronic signature value may be generated by encrypting with a first private key. After that, the first electronic terminal 130 may transmit the first electronic signature value to the electronic contract processing server 110 .

In this way, as the first electronic signature value is generated by encrypting the electronic contract data in the first electronic terminal 130 with the first private key stored in the first electronic terminal 130, the first electronic terminal 130 generates the first electronic signature value. When the first electronic signature value is received from the electronic contract processing server 110 from 130, 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 decryption value is generated by decrypting the first electronic 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 electronic signature value may be completed.

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

At this time, the second electronic terminal 140 receives the electronic signature request for the electronic contract from the electronic contract processing server 110, the electronic contract data stored in the second electronic terminal 140 A second electronic signature value may be generated by encrypting with a 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, as the second electronic signature value is generated by encrypting the electronic contract data in the second electronic terminal 140 with the second private key stored in the second electronic terminal 140, the second electronic terminal 140 generates the second electronic signature value. When the second electronic signature value is received from the electronic contract processing server 110 from 140, 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 decryption value is generated by decrypting the second electronic signature value with the key.

After that, 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 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 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 receives the electronic contract generated in the first electronic terminal 130 from the first electronic terminal 130 and requests to proceed with the electronic contract with the second user. When a request to proceed with an electronic contract 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 transmits the electronic contract. When a feedback message indicating that the content of the electronic contract is 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 is transmitted from the first electronic terminal 130. When the signed electronic signature value is received, the electronic signature value is verified with the public key corresponding to the corresponding private key, and the electronic signature is requested to the second electronic terminal 140, and the second electronic terminal 140 receives the second electronic signature value. When an electronic signature value signed with a private key stored in the terminal 140 is received, the electronic signature value is verified with a public key corresponding to the corresponding private key, thereby verifying signatures for both the first user and the second user. is completed, and when the signature verification task is completed, a contract completion message indicating that the electronic contract is 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 one 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.

When the contract completion message is transmitted to the first electronic terminal 130 and the second electronic terminal 140, the identification number generation unit 119 uses n for verifying the electronic contract (n is a natural number greater than or equal to 2). A primary identification number of digits and a secondary identification number of k (k is a natural number of 2 or more) digits are randomly generated.

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

At this time, according to one 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 operation matrix having a size of n x k by calculating the Kronecker Product between a column vector having a column vector having k numbers constituting the first auxiliary identification number and a row vector having k numbers constituting the first auxiliary identification number as components, the Euclidean norm of the operation matrix (Euclidean Norm) as the first authentication token.

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

In Equation 1 above denotes the Euclidean norm, and x _i denotes the i-th element included in a vector or matrix.

In addition, the Kronecker product means a matrix that specifically expresses the tensor product of two matrices. Given 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, matrix The Kronecker product between M and matrix N can be expressed as in 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 .

The transmission unit 123 includes data on the first primary identification number and the first authentication token when the first auxiliary identification number and the first authentication token are stored in the contract history database 122 in correspondence with each other. After generating a 2D code and inserting the 2D code as an image into the electronic contract, the electronic contract with the 2D code 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 QR codes (Quick Response Codes), veri codes, dot codes, etc. are used or Korean registered patents A digital code that can express predetermined data on a two-dimensional image through a pixel space composed of a plurality of points disclosed in No. 10-1897960 may be used. In this regard, the figure shown in FIG. 2 shows a 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. It shows an example inserted into the code. As shown at reference numeral 211, this digital code is composed of yellow dots, so when compared 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 Since the camera of can perform identification of yellow dots differently from human vision, the pattern of yellow dots can be clearly identified through an electronic terminal.

Hereinafter, operations of the identification number generation unit 119, the token calculation unit 120, the storage processing unit 121, and the transmission unit 123 will be described in detail by way of example.

First, when the contract completion message is transmitted to the first electronic terminal 130 and the second electronic terminal 140, the identification number generation unit 119 provides an n-digit main identification number for use in verifying the electronic contract. And k-digit secondary identification numbers can be randomly generated.

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

If, by the identification number generation unit 119, the 5-digit first primary identification number '32123' was randomly generated and the 6-digit first auxiliary identification number '123321' was randomly generated. In this case, the token calculation unit 120 applies the first primary identification number '32123' and the first auxiliary identification number '123321' as inputs to the token generating function, so that the first primary identification number '32123'', which is a column vector having as components the five numbers constituting ' ' and '123321', which is a row vector having six numbers constituting '123321', the first auxiliary identification number, as components. ' An operation matrix having a size of 5 x 6 by calculating the Kronecker product of 'in accordance with Equations 2 to 4 above' ' 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 contract history database 122 as shown in Table 1 below. '27.49', the first authentication token, may be stored in correspondence with each other.

1st auxiliary identification number 1st 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 transmits '32123', which is the first main identification number. ' and data for '27.49', the first authentication token, is generated, the 2D code is inserted as an image into the electronic contract, and the electronic contract in which the 2D code is inserted is generated. It can be transmitted to the first electronic terminal 130 and the second electronic terminal 140 .

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

When the electronic contract with the two-dimensional code is transmitted to the first electronic terminal 130 and the second electronic terminal 140, the transaction generating unit 124 transmits the electronic contract, the first electronic signature value, and the second electronic contract value. 2 Generates a transaction including an electronic 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 the plurality of node devices 101, 102, 103, and 104 constituting the blockchain network, and then the transaction is performed with the first node device. While transmitting, transmits a registration request to the blockchain network of the transaction.

At this time, when the first node device receives the registration request together with the transaction from the electronic contract processing server 110, the transaction is included on the basis of the previous block chained to the blockchain data stored on the memory. By generating a first block and connecting the first block to the blockchain data in a chain, after completing the storage of the first block, the first block is transferred to a plurality of node devices through the blockchain network ( 101, 102, 103, 104) can propagate to the remaining node devices except for the first node device.

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 in a chain to the blockchain data. The first block, which is a new block, may be created. Then, the first node device completes the storage of the first block by chaining the first block to the block chain data, and then transfers the first block to a plurality of node devices through the block chain network. Of (101, 102, 103, 104), it can be propagated to the remaining node devices except for the first node device.

In this way, the electronic contract processing server 110 according to the present invention transmits the electronic contract with the two-dimensional code inserted to the first electronic terminal 130 and the second electronic terminal 140, the electronic contract, the first By registering 1 electronic signature value, the second electronic signature value, the first auxiliary identification number, and the first authentication token in the blockchain network, the integrity of the electronic contract between the first user and the second user can guarantee

According to one 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 confirmation unit 128, and a completion message transmission unit 129. can include

After the electronic contract with the two-dimensional code is transmitted to the first electronic terminal 130 and the second electronic terminal 140, the instruction message transmitter 126 sends the first electronic terminal 130 and the second electronic terminal 130 to the second electronic terminal 130. From one of the electronic terminals of the terminal 140, a paper document for the electronic contract (here, the paper document means a document in which the electronic contract is printed on paper) is transmitted between the first user and the second user. When a verification process request for verifying whether a contract document according to an electronic contract is correct is received, a code scan instruction message instructing to scan the two-dimensional code inserted in the paper document is generated to generate any one of the electronic send to terminal

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 any one of the electronic terminals, 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 verification 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 , The operation result calculated when the first primary identification number received from any one of the electronic terminals 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 it is

When the completion message transmission unit 129 confirms that the result of the operation is the first authentication token, the verification process indicates that the paper document is correct according to the electronic contract between the first user and the second user. A completion message is generated and transmitted to the 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 by way of 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 130 A verification processing request for verifying whether the paper document for the electronic contract is correct according to the electronic contract between the first user and the second user is received from any one of the electronic terminals 140. Assume that it is received by the contract processing server 110.

Then, the instruction message transmission unit 126 may generate a code scan instruction message instructing to scan the 2D code inserted in 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 any one electronic terminal by the instruction message transmission unit 126, the two-dimensional code inserted into the paper document is scanned and recognized by the one electronic terminal. Accordingly, when the first main identification number '32123' and the first authentication token '27.49' extracted through the two-dimensional code inserted into the paper document are received from any one of the electronic terminals, the assistant The identification number extraction unit 127 may extract an auxiliary identification number stored in correspondence with the same authentication token as the first authentication token '27.49' from the contract history database 122 as shown in Table 1.

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 with the same authentication token as '27.49', which is the first authentication token, If it is assumed that the first auxiliary identification number '123321' is extracted, the token verification unit 128 sends the token generation function to the first main identification number '32123' received from any one of the electronic terminals and the When '123321', the first auxiliary identification number extracted from the contract history database 122 as shown in Table 1, is applied as an input, it can be checked whether the calculation result is '27.49', the first authentication token. there is.

If it is confirmed that the operation result is '27.49', which is the first authentication token, by the token verification unit 128, the first main identification number received from any one of the electronic terminals and the first Since the authentication token means that the information extracted from the normally issued two-dimensional code is correct, the completion message transmission unit 129 determines that the paper document is a contract document according to an electronic contract between the first user and the second user. A verification process completion message indicating may 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 process completion message is received from the electronic contract processing server 110, the one electronic terminal may output the verification process completion message as text on the screen, , After synthesizing the verification process completion message into a voice using a predetermined voice synthesis model, the voice may be output through a 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 operating method of an electronic contract processing server 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 possessed by the first user and the second electronic terminal pre-stored in the second user possessed A public key storage unit in which a second public key corresponding to the second private key is stored is maintained.

In step S320, when an electronic contract created in the first electronic terminal is received from the first electronic terminal and an electronic contract progress request requesting to proceed with the electronic contract with the second user is received, the second electronic contract is received. 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 a feedback message based on the data on the electronic contract. 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 is obtained from the first electronic terminal. Upon reception of the first public key, the first public key is extracted from the public key storage unit, and then the first digital signature value is decrypted with the first public key to generate a first decryption value.

In step S350, if the first decryption value is generated, it is checked whether the first decryption value matches the data on the electronic contract, and the first decryption value matches the data on the electronic contract. If confirmed, verification of the first electronic signature value is completed, and an electronic signature based on the data of the electronic contract is requested to 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 is obtained from the second electronic terminal. Upon receiving, the second public key is extracted from the public key storage unit, and then the second electronic signature value is decrypted with the second public key to generate a second decryption value.

In step S370, if the second decryption value is generated, it is checked whether the second decryption value matches the electronic contract data, and the second decryption value matches the electronic contract data. If confirmed, 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 operating method of the electronic contract processing server is to use for verifying 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) digits main identification number and k (k is a natural number of 2 or more) digit auxiliary identification number, the first main identification number is randomly selected as the n-digit main identification number generated, and 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 the application, when the first authentication token is calculated, storing the first auxiliary identification number and the first authentication token in correspondence with each other in a contract history database, and storing the first authentication token 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 included in the electronic contract. After inserting the code into 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 one 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 operation 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 components, the Euclidean norm of the operation matrix is calculated as the first authentication It can be a function that yields tokens.

In addition, according to one embodiment of the present invention, 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 After randomly selecting a first node device that is any one of the node devices, the method may further include transmitting a request for registration of the transaction to the blockchain network while transmitting the transaction to the first node device. .

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

In addition, according to one embodiment of the present invention, the operating method of the electronic contract processing server, after the electronic contract with the two-dimensional code inserted is transmitted to the first electronic terminal and the second electronic terminal, the first electronic contract From 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 process request for verifying whether a contract document according to an electronic contract is correct is received, a code scan instruction message instructing to scan the two-dimensional code inserted in the paper document is generated to generate any one of the electronic 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 by the one of the electronic terminals, the one of the above 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 the contract history database, the same authentication token as the first authentication token Extracting a correspondingly stored auxiliary identification number, when the first auxiliary identification number is extracted from the contract history database as an auxiliary identification number stored in correspondence with the same authentication token as the first authentication token, An operation result calculated when the first primary identification number received from any one of the electronic terminals and the first auxiliary identification number extracted from the contract history database is applied to the token generation function as inputs, the first authentication Checking whether the token is a token, and if the result of the operation is confirmed to be the first authentication token, verification indicating that the paper document is a contract document according to an electronic contract between the first user and the second user. The method may further include generating a processing completion message and transmitting the message to one of the electronic terminals.

In the above, the operating method of the electronic contract processing server according to an embodiment of the present invention has been described with reference to FIG. 3 . Here, since the operation method 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, a more detailed description thereof will be omitted.

An operating method of an electronic contract processing server 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 a combination with a computer.

In addition, in one embodiment of the present invention, the operating method of the electronic contract processing server for processing the electronic contract between the parties may be implemented in the form of computer program instructions for execution through combination with a computer and recorded on a computer readable medium. The computer readable medium may include program instructions, data files, data structures, etc. alone or in combination. Program instructions recorded on the medium may be those specially designed and configured for the present invention or those known and usable to those skilled in computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks and magnetic tapes, optical media such as CD-ROMs and DVDs, and magnetic media such as floptical disks. - includes hardware devices specially configured to store and execute program instructions, such as magneto-optical media, and ROM, RAM, flash memory, and the like. Examples of program instructions include high-level language codes that can be executed by a computer using an interpreter, as well as machine language codes such as those produced by a compiler.

As described above, the present invention has been described by specific details such as specific components and limited embodiments and drawings, but these are provided to help a more general understanding of the present invention, and the present invention is not limited to the above embodiments. , Those skilled in the art in the field to which the present invention belongs can make various modifications and variations from these descriptions.

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

110: Electronic contract processing server for processing electronic contracts between 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 generation unit 118: message transmission 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 confirmation unit
129: completion message transmission unit
130: first electronic terminal
140: second electronic terminal

Claims (12)

In an electronic contract processing server that processes electronic contracts between parties,
The first public key corresponding to the first private key pre-stored in the first electronic terminal possessed by the first user and the second private key pre-stored in the second electronic terminal possessed by the second user a public key storage unit in which a corresponding second public key is stored;
When the electronic contract created in the first electronic terminal is received from the first electronic terminal and an electronic contract progress request requesting to proceed with the electronic contract with the second user is received, the electronic contract is transmitted to the second electronic terminal. a confirmation request unit for transmitting a confirmation request message instructing to confirm the content 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, a first signature requesting an electronic signature based on the electronic contract to the first electronic terminal requesting department;
As 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 public key is stored. a first decryption unit extracting the first public key from the first public key and 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 electronic contract, and if it is confirmed that the first decryption value matches the electronic contract, the first decryption value for the first electronic signature value a second signature requesting unit that completes verification and requests an electronic signature based on the electronic contract to the second electronic terminal;
As 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 public key is stored. a second decryption unit extracting the second public key from the second public key and decrypting the second electronic 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 electronic contract, and if it is confirmed that the second decryption value matches the electronic contract, the second decryption value for the second electronic signature value a message generating unit that completes verification and generates a contract completion message indicating that the contract between the first user and the second user has been completed;
a message transmission unit transmitting the contract completion message to the first electronic terminal and the second electronic terminal;
When the contract completion message is transmitted to the first electronic terminal and the second electronic terminal, a main identification number of n (n is a natural number of 2 or more) digits for use in verifying the electronic contract and k (k is a natural number of 2 or more) an identification number generation unit randomly generating auxiliary identification numbers of natural number) digits;
When the first primary identification number is randomly generated with the n-digit primary identification number and the first auxiliary identification number is randomly generated with the k-digit auxiliary identification number, in a preset token generation function for generating an authentication token. a token calculator calculating a first authentication token by applying the first primary identification number and the first auxiliary identification number as inputs;
When the first authentication token is calculated, 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; and
When the first auxiliary identification number and the first authentication token are stored in correspondence with the contract history database, a two-dimensional code including data for the first main identification number and the first authentication token is generated, A transmission unit for inserting the 2D code into an electronic contract as an image and then transmitting the electronic contract into which the 2D code is inserted to the first electronic terminal and the second electronic terminal
including,
The token generating function is
When the first main identification number and the first auxiliary identification number are applied as inputs, a column vector having n numbers constituting the first main identification number as components and k numbers constituting the first auxiliary identification number A function that calculates the Kronecker product between row vectors having as components to generate an operation matrix having a size of nxk, and then calculates the Euclidean norm of the operation matrix as the first authentication token. Characterized by electronic contract processing server. delete delete According to claim 1,
When the electronic contract with the two-dimensional code 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 generating unit generating a transaction including the first authentication token. and
When the transaction is generated, after randomly selecting a first node device, which is any one of a plurality of node devices constituting the blockchain network, while transmitting the transaction to the first node device, the block chain of the transaction A registration request unit that transmits a registration request to the network.
Including more,
The first node device is
When the registration request together with the transaction is received from the electronic contract processing server, a first block including the transaction is generated based on a previous block chained to blockchain data stored in a memory, and the first block includes the first block. By connecting a block to the blockchain data in a chain, after completing the storage of the first block, the first block is transferred through the blockchain network to the rest of the nodes except the first node device among the plurality of node devices. An electronic contract processing server characterized by propagating to devices. According to claim 1,
After the electronic contract with the two-dimensional code 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, the electronic contract Receives a verification processing request requesting to verify whether a paper document for a paper document, wherein the paper document is a document in which the electronic contract is printed on paper, is correct according to an electronic contract between the first user and the second user an instruction message transmission unit generating a code scan instruction message instructing to scan the two-dimensional code inserted in the paper document and transmitting the message to any 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 primary identification number and the first authentication token extracted through the two-dimensional code inserted into the paper document are received, the assistant stored in correspondence with the same authentication token as the first authentication token from the contract history database. Secondary 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 with the same authentication token as the first authentication token, the token generation function receives reception from any one of the electronic terminals. a token confirmation unit that checks whether an operation result calculated when the first primary identification number and the first auxiliary identification number extracted from the contract history database are applied as inputs is the first authentication token; and
If it is confirmed that the result of the operation is the first authentication token, a verification processing completion message indicating that the paper document is a contract document according to an electronic contract between the first user and the second user is generated, and any one of the above Completion message transmission unit for transmitting to the electronic terminal of
Electronic contract processing server further comprising a. A method of operating 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 possessed by the first user and the second private key pre-stored in the second electronic terminal possessed by the second user maintaining a public key storage unit in which a corresponding second public key is stored;
When the electronic contract created in the first electronic terminal is received from the first electronic terminal and an electronic contract progress request requesting to proceed with the electronic contract with the second user is received, the electronic contract is transmitted to the second electronic terminal. Transmitting a confirmation request message instructing to confirm the contents of the electronic contract while transmitting the contract;
requesting an electronic signature based on the electronic contract to the first electronic terminal 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;
As 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 public key is stored. generating a first decryption value by decrypting the first electronic signature value with the first public key after extracting the first public key from the first public key;
When the first decryption value is generated, it is checked whether the first decryption value matches the electronic contract, and if it is confirmed that the first decryption value matches the electronic contract, the first decryption value for the first electronic signature value completing verification and requesting an electronic signature based on the electronic contract to the second electronic terminal;
As 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 public key is stored. generating a second decryption value by decrypting the second digital signature value with the second public key after extracting the second public key from the second public key;
When the second decryption value is generated, it is checked whether the second decryption value matches the electronic contract, and if it is confirmed that the second decryption value matches the electronic contract, the second decryption value for the second electronic signature value completing verification and generating a contract completion message indicating that the contract between the first user and the second user is complete;
transmitting the contract completion message to the first electronic terminal and the second electronic terminal;
When the contract completion message is transmitted to the first electronic terminal and the second electronic terminal, a main identification number of n (n is a natural number of 2 or more) digits for use in verifying the electronic contract and k (k is a natural number of 2 or more) Randomly generating an auxiliary identification number of natural number) digits;
When the first primary identification number is randomly generated with the n-digit primary identification number and the first auxiliary identification number is randomly generated with the k-digit auxiliary identification number, in a preset token generation function for generating an authentication token. calculating a first authentication token by applying the first primary identification number and the first auxiliary identification number as inputs;
If the first authentication token is calculated, storing the first auxiliary identification number and the first authentication token in correspondence with each other in a contract history database; and
When the first auxiliary identification number and the first authentication token are stored in correspondence with the contract history database, a two-dimensional code including data for the first main identification number and the first authentication token is generated, After inserting the 2D code as an image into the electronic contract, transmitting the electronic contract into which the 2D code is inserted to the first electronic terminal and the second electronic terminal
including,
The token generating function is
When the first main identification number and the first auxiliary identification number are applied as inputs, a column vector having n numbers constituting the first main identification number as components and k numbers constituting the first auxiliary identification number A function that calculates the Kronecker product between row vectors having as components to generate an operation matrix having a size of nxk, and then calculates the Euclidean norm of the operation matrix as the first authentication token. Method of operation of the characterized electronic contract processing server. delete delete According to claim 6,
When the electronic contract with the two-dimensional code 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, after randomly selecting a first node device, which is any one of a plurality of node devices constituting the blockchain network, while transmitting the transaction to the first node device, the block chain of the transaction Sending a registration request to the network
Including more,
The first node device is
When the registration request together with the transaction is received from the electronic contract processing server, a first block including the transaction is generated based on a previous block chained to blockchain data stored in a memory, and the first block includes the first block. By connecting a block to the blockchain data in a chain, after completing the storage of the first block, the first block is transferred through the blockchain network to the rest of the nodes except the first node device among the plurality of node devices. A method of operating an electronic contract processing server, characterized in that it propagates to devices. According to claim 6,
After the electronic contract with the two-dimensional code 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, the electronic contract Receives a verification processing request requesting to verify whether a paper document for a paper document, wherein the paper document is a document in which the electronic contract is printed on paper, is correct according to an electronic contract between the first user and the second user generating a code scan instruction message instructing to scan the two-dimensional code inserted in the paper document and transmitting the message to any 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 primary identification number and the first authentication token extracted through the two-dimensional code inserted into the paper document are received, the assistant 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 with the same authentication token as the first authentication token, the token generation function receives reception from any one of the electronic terminals. confirming whether an operation result calculated when the first primary identification number and the first auxiliary identification number extracted from the contract history database are applied as inputs becomes the first authentication token; and
If it is confirmed that the result of the operation is the first authentication token, a verification processing completion message indicating that the paper document is a contract document according to an electronic contract between the first user and the second user is generated, and any one of the above transmitting to an electronic terminal of
Method of operating 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, 9 or 10 through a combination with a computer. A computer program stored in a storage medium for executing the method of any one of claims 6, 9 or 10 through a combination with a computer.

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