KR102622454B1 - Agricultural products eco-friendly certification verification server verifying eco-friendly certificated agricultural products, based on two-dimensional code, and the operating method thereof - Google Patents

Abstract

Disclosed is an agricultural product eco-friendly certification confirmation server and its operating method that checks whether agricultural products are eco-friendly certified agricultural products based on a two-dimensional code. The present invention provides that when a user who has purchased agricultural products recognizes a two-dimensional code printed on the packaging of the agricultural product with his or her electronic terminal, the agricultural products purchased by the user are certified as eco-friendly based on the information inserted in the two-dimensional code. This is about an agricultural product eco-friendly certification confirmation server that can check whether the agricultural product has received the certification and its operation method.

Description

Agricultural product eco-friendly certification verification server and its operation method that checks whether agricultural products are eco-friendly certified agricultural products based on a two-dimensional code {AGRICULTURAL PRODUCTS ECO-FRIENDLY CERTIFICATION VERIFICATION SERVER VERIFYING ECO-FRIENDLY CERTIFICATED AGRICULTURAL PRODUCTS, BASED ON TWO -DIMENSIONAL CODE, AND THE OPERATING METHOD THEREOF}

The present invention relates to an agricultural product eco-friendly certification confirmation server and a method of operating the same, which checks whether agricultural products are eco-friendly certified agricultural products based on a two-dimensional code.

Eco-friendly agricultural products refer to agricultural products produced without using any or minimal amounts of pesticides and chemical fertilizers in order to preserve the environment and provide safe agricultural products to consumers. They undergo strict screening by the National Agricultural Quality Management Institute and public and private companies. The principle is that only businesses that have received certification can display an eco-friendly rating on agricultural products.

Recently, as people's interest in the environment and health increases, interest in eco-friendly agricultural products is also increasing.

However, if a business operator that has not been properly certified by the National Agricultural Quality Management Institute and a public-private company labels the agricultural product on the packaging as if the agricultural product has been certified as eco-friendly, the user who purchased the agricultural product may not know that the agricultural product in question is actually eco-friendly. There is a problem that it is difficult to check whether the agricultural product has been certified.

If a predetermined two-dimensional code containing information for eco-friendly certification of agricultural products is printed on the packaging of eco-friendly agricultural products, the user who purchases the agricultural products can use the two-dimensional code printed on the packaging of the agricultural products to his/her electronic device. If you can scan with a terminal to check whether the agricultural product in question has actually received eco-friendly certification, this will increase the reliability of eco-friendly agricultural products in that users can more accurately and quickly check whether the agricultural product is certified as eco-friendly. You will be able to.

Therefore, research is needed on technology to check whether agricultural products are certified as eco-friendly based on two-dimensional codes.

The present invention provides that when a user who has purchased agricultural products recognizes a two-dimensional code printed on the packaging of the agricultural product with his or her electronic terminal, the agricultural products purchased by the user are certified as eco-friendly based on the information inserted in the two-dimensional code. By presenting an agricultural product eco-friendly certification confirmation server and its operation method that can check whether the agricultural product has received the certification, we aim to support the user to more accurately and quickly check whether the agricultural product is certified as eco-friendly.

According to an embodiment of the present invention, the agricultural product eco-friendly certification confirmation server, which checks whether the agricultural product is an eco-friendly certified agricultural product based on a two-dimensional code, selects a plurality of agricultural products that are pre-designated as eco-friendly certified agricultural products - the above Each of the plurality of agricultural products is pre-assigned a main identification number of n (n is a natural number of 2 or more) digits and a secondary identification number of k (k is a natural number of 2 or more) digits for identification of each agricultural product, and the plurality of On the packaging of each agricultural product, a two-dimensional code in which the main identification number for each agricultural product is inserted, and a secondary identification number for each agricultural product are pre-printed - a secondary identification number for each and the plurality of agricultural products. Preset authentication token for each - The authentication token refers to the output value calculated by applying the main identification number and secondary identification number for each agricultural product as input to the preset token generation function - These are stored in correspondence with each other. Complex information storage unit, when a request for confirmation as to whether the first agricultural product is an agricultural product that has received eco-friendly certification is received from the electronic terminal of a user who purchased a first agricultural product among the plurality of agricultural products, the electronic terminal is sent An auxiliary identification number request unit for requesting transmission of an auxiliary identification number for the first agricultural product, printed on the packaging of the first agricultural product from the electronic terminal in response to a request for transmission of the auxiliary identification number for the first agricultural product When a first auxiliary identification number is received, an authentication token extraction unit extracts a first authentication token stored corresponding to the first auxiliary identification number from the complex information storage unit, and when the first authentication token is extracted, A state identification number request unit that requests transmission of the state identification number inserted in the two-dimensional code printed on the packaging of the first agricultural product to an electronic terminal, in response to a request for transmission of the state identification number for the first agricultural product, In the electronic terminal, the two-dimensional code printed on the packaging of the first agricultural product is recognized and the first state identification number, which is the state identification number for the first agricultural product, is extracted, thereby identifying the first state from the first electronic terminal. When a number is received, a token calculation unit that calculates an authentication token for verification by applying the first primary identification number and the first auxiliary identification number as input to the token generation function, and when the authentication token for verification is calculated, Check whether the authentication token for verification is the same as the first authentication token, and if the authentication token for verification is confirmed to be the same as the first authentication token, confirm that the first agricultural product is an agricultural product that has received eco-friendly certification. It includes a certification confirmation unit and a certification confirmation message transmission unit that, when it is confirmed that the first agricultural product is an agricultural product that has received eco-friendly certification, generates a certification confirmation message indicating that the first agricultural product is an agricultural product that has received eco-friendly certification and transmits it to the electronic terminal. do.

In addition, the operation method of the agricultural product eco-friendly certification confirmation server that checks whether the agricultural product is an eco-friendly certified agricultural product based on a two-dimensional code according to an embodiment of the present invention is to use a plurality of agricultural products pre-designated as eco-friendly certified agricultural products. Agricultural products - Each of the plurality of agricultural products is pre-assigned a main identification number of n (n is a natural number of 2 or more) digits and a secondary identification number of k (k is a natural number of 2 or more) digits for identification of each agricultural product. On the packaging of each of the plurality of agricultural products, a two-dimensional code in which the main identification number for each agricultural product is inserted, and a secondary identification number for each agricultural product are pre-printed - a secondary identification number for each, A preset authentication token for each of the plurality of agricultural products - the authentication token refers to an output value calculated by applying the main identification number and secondary identification number for each agricultural product as input to a preset token generation function - these are mutually exclusive. Maintaining a composite information storage unit stored in correspondence, requesting confirmation from the electronic terminal of a user who has purchased a first agricultural product, which is one of the plurality of agricultural products, as to whether the first agricultural product is an agricultural product that has received eco-friendly certification; When received, requesting transmission of an auxiliary identification number for the first agricultural product to the electronic terminal, in response to a request for transmission of the auxiliary identification number for the first agricultural product, from the electronic terminal, When the first auxiliary identification number printed on the packaging is received, extracting a first authentication token stored corresponding to the first auxiliary identification number from the complex information storage unit, when the first authentication token is extracted, Requesting transmission of a state identification number inserted in a two-dimensional code printed on the packaging of the first agricultural product to the electronic terminal, in response to a request for transmission of the state identification number for the first agricultural product, from the electronic terminal , As the two-dimensional code printed on the packaging of the first agricultural product is recognized and the first state identification number, which is the state identification number for the first agricultural product, is extracted, the first state identification number is received from the first electronic terminal. When this happens, calculating an authentication token for verification by applying the first primary identification number and the first auxiliary identification number as input to the token generation function. When the authentication token for verification is calculated, the authentication token for verification is Checking whether the verification token is the same as the first authentication token, and if it is confirmed that the verification token is the same as the first authentication token, confirming that the first agricultural product is an agricultural product that has received eco-friendly certification; and When it is confirmed that the agricultural product is an agricultural product that has received eco-friendly certification, it includes generating a certification confirmation message indicating that the first agricultural product is an agricultural product that has received eco-friendly certification and transmitting it to the electronic terminal.

The present invention provides that when a user who has purchased agricultural products recognizes a two-dimensional code printed on the packaging of the agricultural product with his or her electronic terminal, the agricultural products purchased by the user are certified as eco-friendly based on the information inserted in the two-dimensional code. By presenting an agricultural product eco-friendly certification confirmation server and its operation method that can check whether the agricultural product has received the certification, it is possible to support the user to more accurately and quickly check whether the agricultural product is certified as eco-friendly.

Figure 1 is a diagram illustrating the structure of an agricultural product eco-friendly certification confirmation server that checks whether agricultural products are eco-friendly certified agricultural products based on a two-dimensional code according to an embodiment of the present invention.
Figure 2 is a diagram illustrating the operation of an agricultural product eco-friendly certification confirmation server that checks whether agricultural products are certified eco-friendly based on a two-dimensional code according to an embodiment of the present invention.
Figure 3 is a flowchart showing the operation method of the agricultural product eco-friendly certification confirmation server that checks whether the agricultural product is eco-friendly certified agricultural product based on a two-dimensional code according to an embodiment of the present invention.

Hereinafter, embodiments according to the present invention will be described in detail with reference to the attached drawings. This description is not intended to limit the present invention to specific embodiments, but should be understood to include all changes, equivalents, and substitutes included in the spirit and technical scope of the present invention. In describing each drawing, similar reference numerals are used for similar components, and unless otherwise defined, all terms used in this specification, including technical or scientific terms, are within the scope of common knowledge in the technical field to which the present invention pertains. It has the same meaning as generally understood by those who have it.

In this document, when a part "includes" a certain component, this means that it may further include other components rather than excluding other components, unless specifically stated to the contrary. Additionally, in various embodiments of the present invention, each component, functional block, or means may be composed of one or more subcomponents, and the electrical, electronic, and mechanical functions performed by each component may be electronic. It may be implemented with various known elements or mechanical elements such as circuits, integrated circuits, and ASICs (Application Specific Integrated Circuits), and may be implemented separately or by integrating two or more into one.

Meanwhile, the blocks in the attached block diagram or the steps in the flow chart are computer program instructions that are mounted on the processor or memory of equipment capable of data processing, such as general-purpose computers, special-purpose computers, portable laptop computers, and network computers, and perform designated functions. It can be interpreted to mean. Because these computer program instructions can be stored in a memory provided in a computer device or in a computer-readable memory, the functions described in the blocks of a block diagram or the steps of a flow diagram can be produced as a manufactured product containing instruction means to perform them. It could be. In addition, 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). Additionally, it should be noted that in some alternative embodiments, it is possible for functions mentioned in blocks or steps to be executed in a different 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.

Figure 1 is a diagram illustrating the structure of an agricultural product eco-friendly certification confirmation server that checks whether agricultural products are eco-friendly certified agricultural products based on a two-dimensional code according to an embodiment of the present invention.

Referring to Figure 1, the agricultural product eco-friendly certification confirmation server 110 according to the present invention includes a complex information storage unit 111, an auxiliary identification number request unit 112, an authentication token extraction unit 113, and a main identification number request unit ( 114), a token calculation unit 115, an authentication confirmation unit 116, and an authentication confirmation message transmission unit 117.

First, the plurality of agricultural products in the present invention are agricultural products that have been pre-designated as eco-friendly certified agricultural products, and each of the plurality of agricultural products has a main digit of n (n is a natural number of 2 or more) for identification of each agricultural product. An identification number and an auxiliary identification number of k (k is a natural number of 2 or more) digits are pre-allocated, and on the packaging of each of the plurality of agricultural products, a two-dimensional code in which the main identification number for each agricultural product is inserted, and each Supplementary identification numbers for agricultural products are pre-printed.

Here, the two-dimensional code refers to a code that can insert information such as various characters into a two-dimensional image pattern. QR code (Quick Response Code), veri code, dot code, etc. are used, or Korean registered patent codes are used. A digital code that can express certain data on a two-dimensional image through a pixel space composed of a plurality of points disclosed in No. 10-1897960 can be used. In this regard, the picture shown in FIG. 2 shows that 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 white packaging paper 210 is displayed in the two-dimensional image. This shows an example inserted as code. As shown in reference numeral 211, this digital code is composed of yellow dots, and when compared to a white background, the color contrast is not clear, so it is difficult to clearly observe with the naked eye, but it is difficult to observe clearly with the naked eye. The camera has the characteristic of being able to identify yellow dots differently from human vision, allowing the pattern of yellow dots to be clearly identified through an electronic terminal.

In this situation, the complex information storage unit 111 of the agricultural product eco-friendly certification confirmation server 110 contains an auxiliary identification number for each of the plurality of agricultural products, and a preset authentication token for each of the plurality of agricultural products (the authentication token refers to the output value calculated by applying the main identification number and secondary identification number for each agricultural product as input in a preset token generation function) are stored in correspondence with each other.

At this time, according to one embodiment of the present invention, when the n-digit primary identification number and k-digit auxiliary identification number pre-assigned to any one agricultural product among the plurality of agricultural products are applied as input, the token generation function inputs Kronecker product (Kronecker product) between a column vector whose components are n numbers constituting the n-digit primary identification number applied as input, and a row vector whose components are k numbers constituting the k-digit auxiliary identification number applied as input. It may be a function that calculates (Product) to generate an operation matrix of size n

Here, the Kronecker product refers to a matrix that specifically expresses the tensor product of two matrices. Given a matrix A of size a x b as in Equation 1 below and matrix B of size p x q as in Equation 2 below, , the Kronecker product between matrix A and matrix B can be expressed as Equation 3 below.

Additionally, the Euclidean norm is an L2 norm that represents the size of a vector or matrix in Euclidean space, and can be expressed as Equation 4 below.

At this time, means the Euclidean norm, means the ith component of a vector or matrix.

For example, let us assume that n is '5' and k is '6', and that the plurality of agricultural products are 'Agricultural Product 1, Agricultural Product 2, and Agricultural Product 3'.

At this time, if '32123' is pre-allocated as the main identification number for 'Agricultural Product 1' and '123321' is pre-allocated as the secondary identification number, '32123' is written on the packaging of 'Agricultural Product 1'. The inserted 2D code and '123321' may be pre-printed.

In addition, when '32123' and '123321' are input to the token generation function and the calculated output value is called 'authentication token 1', '123321' and 'authentication token 1' are stored in the complex information storage unit 111. ' may be stored in correspondence with each other.

In this way, the complex information storage unit 111 contains auxiliary identification numbers for each of 'Agricultural Product 1, Agricultural Product 2, and Agricultural Product 3' and an auxiliary identification number for each of 'Agricultural Product 1, Agricultural Product 2, and Agricultural Product 3', as shown in Table 1 below. Preset authentication tokens may be stored in correspondence with each other.

Agricultural products Secondary identification number authentication token agricultural products 1 123321 authentication token 1 agricultural products 2 234432 authentication token 2 agricultural products 3 345543 Authentication Token 3

The auxiliary identification number request unit 112 receives information from the electronic terminal 131 of the user 130 who purchased the first agricultural product, which is one of the plurality of agricultural products, as to whether the first agricultural product is an agricultural product that has received eco-friendly certification. When a confirmation request is received, transmission of an auxiliary identification number for the first agricultural product is requested to the electronic terminal 131.

When the authentication token extraction unit 113 receives the first auxiliary identification number printed on the packaging of the first agricultural product from the electronic terminal 131 in response to a request to transmit the auxiliary identification number for the first agricultural product, The first authentication token stored corresponding to the first auxiliary identification number is extracted from the complex information storage unit 111.

When the first authentication token is extracted by the authentication token extraction unit 113, the main identification number request unit 114 sends the main identification number inserted in the two-dimensional code printed on the packaging of the first agricultural product to the electronic terminal 131. Request transmission of identification number.

In response to a request to transmit the main identification number for the first agricultural product, the token calculation unit 115 recognizes the two-dimensional code printed on the packaging of the first agricultural product at the electronic terminal 131 and sends it to the first agricultural product. As the first primary identification number, which is the primary identification number for the system, is extracted, when the first primary identification number is received from the electronic terminal 131, the first primary identification number and the first auxiliary identification number are generated using the token generation function. It is applied as an input to calculate an authentication token for verification.

When the authentication token for verification is calculated by the token calculation unit 115, the authentication confirmation unit 116 checks whether the authentication token for verification is the same as the first authentication token, and determines whether the authentication token for verification is the same as the first authentication token. If it is confirmed to be the same as the first certification token, it is confirmed that the first agricultural product is an agricultural product that has received eco-friendly certification.

When it is confirmed by the certification confirmation unit 116 that the first agricultural product is an agricultural product that has received eco-friendly certification, the certification confirmation message transmission unit 117 generates a certification confirmation message indicating that the first agricultural product is an agricultural product that has received eco-friendly certification. and transmits it to the electronic terminal 131.

Hereinafter, the auxiliary identification number request unit 112, the authentication token extraction unit 113, the main identification number request unit 114, the token calculation unit 115, the authentication confirmation unit 116, and the authentication confirmation message transmission unit 117. )'s operation will be explained in detail using an example.

First, as in the above-mentioned example, the plurality of agricultural products are called 'Agricultural Product 1, Agricultural Product 2, and Agricultural Product 3', and the user 130 who purchased 'Agricultural Product 1' enters 'Agricultural Product 1' in the electronic terminal 131. Let's assume that an order to confirm whether the agricultural product has received eco-friendly certification has been approved.

At this time, according to one embodiment of the present invention, the electronic terminal 131 may transmit a confirmation request to the agricultural product eco-friendly certification confirmation server 110 as to whether 'agricultural product 1' is an agricultural product that has received eco-friendly certification.

Accordingly, when a confirmation request for 'agricultural product 1' is received by the agricultural product eco-friendly certification confirmation server 110, the auxiliary identification number request unit 112 transmits the auxiliary identification number for 'agricultural product 1' to the electronic terminal 131. You can request.

At this time, according to an embodiment of the present invention, when a request to transmit an auxiliary identification number for 'agricultural product 1' is received from the agricultural product eco-friendly certification confirmation server 110, the electronic terminal 131 responds to the user 130, An input guidance message instructing to input the auxiliary identification number for 'Agricultural Product 1' into the electronic terminal 131 may be displayed on the screen.

In response, when the user 130 checks the auxiliary identification number '123321' for 'Agricultural Product 1' printed on the packaging of 'Agricultural Product 1' and enters '123321' in the electronic terminal 131, the electronic The terminal 131 may transmit '123321' to the agricultural product eco-friendly certification confirmation server 110.

Accordingly, when '123321' is received by the agricultural product eco-friendly certification confirmation server 110, the authentication token extraction unit 113 receives the information stored corresponding to '123321' from the complex information storage unit 111 as shown in Table 1 above. ‘Authentication Token 1’ can be extracted.

Then, the main identification number request unit 114 may request the electronic terminal 131 to transmit the main identification number inserted in the two-dimensional code printed on the packaging of 'Agricultural Product 1'.

At this time, according to one embodiment of the present invention, the electronic terminal 131 receives a request from the agricultural product eco-friendly certification confirmation server 110 to transmit the main identification number inserted in the two-dimensional code printed on the packaging of 'agricultural product 1'. When received, a code recognition message instructing the user 130 to recognize the two-dimensional code pre-printed on the packaging of 'Agricultural Product 1' using the electronic terminal 131 can be displayed on the screen. .

Then, the user 130 can cause the electronic terminal 131 to recognize the two-dimensional code printed on the packaging of 'Agricultural Product 1' in response to the code recognition message.

At this time, according to the above-mentioned example, '32123', the main identification number for 'Agricultural Product 1', is inserted in the two-dimensional code printed on the packaging of 'Agricultural Product 1', so the electronic terminal 131 is connected to the user 130. When the two-dimensional code printed on the packaging of 'Agricultural Product 1' is recognized, '32123' is extracted from the two-dimensional code printed on the packaging of 'Agricultural Product 1', and then '32123' is sent to the agricultural product eco-friendly certification confirmation server 110. can be transmitted.

Accordingly, when '32123' is received by the agricultural product eco-friendly certification confirmation server 110, the token calculation unit 115 applies '32123' and '123321' as input to the token generation function to create an authentication token for verification. can be created.

At this time, according to one embodiment of the present invention, the token calculation unit 115 applies '32123' and '123321' as input to the token generation function, thereby using the '5' numbers constituting '32123' as components. A column vector with ' ' and ', a row vector with the '6' numbers that make up '123321' as components. ' Calculate the Kronecker product between ' It can be created like this:

Then, the token calculation unit 115 can calculate the authentication token for verification as '27.49' by calculating the Euclidean norm of the first operation matrix as '27.49' according to Equation 4.

Then, the authentication confirmation unit 116 checks whether the verification authentication token '27.49' and 'authentication token 1' are the same, and if it is confirmed that '27.49' and 'authentication token 1' are the same, the authentication token 116 1 It can be confirmed that the agricultural product is an agricultural product that has received eco-friendly certification.

In relation to this, according to the above-mentioned example, the verification authentication tokens '27.49' and 'authentication token 1' are both output values calculated by applying '32123' and '123321' as input to the token creation function. , the authentication confirmation unit 116 can confirm that '27.49' and 'authentication token 1' are the same.

Here, '27.49' and 'Authentication Token 1' are identical, which means that the state identification number inserted in the two-dimensional code printed on the packaging of 'Agricultural Product 1' matches the state identification number pre-assigned to 'Agricultural Product 1'. Therefore, if '27.49' and 'Certification Token 1' are confirmed to be the same, the certification confirmation unit 116 can confirm that 'Agricultural Product 1' is an agricultural product that has received eco-friendly certification.

In this way, when it is confirmed by the certification confirmation unit 116 that 'agricultural product 1' is an agricultural product that has received eco-friendly certification, the certification confirmation message transmission unit 117 sends a certification confirmation message indicating that 'agricultural product 1' is an agricultural product that has received eco-friendly certification. can be generated and transmitted to the electronic terminal 131.

At this time, according to an embodiment of the present invention, when the electronic terminal 131 receives the authentication confirmation message from the agricultural product eco-friendly certification confirmation server 110, the electronic terminal 131 may output the authentication confirmation message as text on the screen and may display the authentication confirmation message as text on the screen. The authentication confirmation message can be synthesized into voice using the voice synthesis model, and then the corresponding voice can be output through a speaker. Through this, the user 130 can check whether the 'agricultural product 1' purchased by the user is an agricultural product that has received eco-friendly certification.

Additionally, the agricultural product eco-friendly certification confirmation server 110 according to an embodiment of the present invention may further include a video content storage unit 118.

The video content storage unit 118 stores pre-produced video content that introduces the entire production process in an eco-friendly manner until the plurality of agricultural products receive eco-friendly certification.

For example, as in the above-mentioned example, the plurality of agricultural products are referred to as 'Agricultural Product 1, Agricultural Product 2, Agricultural Product 3', and the overall production in an eco-friendly manner until 'Agricultural Product 1, Agricultural Product 2, Agricultural Product 3' receives eco-friendly certification. If the pre-produced video content introducing the process is called 'video content 1', 'video content 1' may be stored in the video content storage unit 118.

At this time, when the authentication confirmation message transmission unit 117 determines that the first agricultural product is an agricultural product that has received eco-friendly certification by the authentication confirmation unit 116, the authentication confirmation message transmission unit 117 performs a download function to download the video content from the video content storage unit 118. After generating path information and generating a download guide message and the authentication confirmation message including the download path information, the download guide message and the authentication confirmation message can be transmitted to the electronic terminal 131.

For example, as in the above-mentioned example, if 'agricultural product 1' is confirmed by the certification confirmation unit 116 to be an agricultural product that has received eco-friendly certification, the certification confirmation message transmission unit 117 transmits the information from the video content storage unit 118. Download path information for downloading 'Video Content 1' can be generated, and after generating a download guide message and the authentication confirmation message including the download path information, the download guide message and the authentication confirmation message can be sent to an electronic terminal. It can be sent to (131).

Through this, the user 130 can download 'Video Content 1' from the video content storage unit 118 based on the download path information included in the download guide message and check 'Video Content 1'. .

In addition, the agricultural product eco-friendly certification confirmation server 110 according to an embodiment of the present invention may further include an expiration date information storage unit 119, a remaining period confirmation unit 120, and a guidance message transmission unit 121.

In the expiration date information storage unit 119, auxiliary identification numbers for each of the plurality of agricultural products and information on the preset expiration date corresponding to each agricultural product are stored in correspondence with each other.

For example, as in the above-mentioned example, when the plurality of agricultural products are called 'agricultural product 1, agricultural product 2, and agricultural product 3', the expiration date information storage unit 119 contains 'agricultural product 1, agricultural product 2, and agricultural product 3' as shown in Table 2 below. 3' Information on the auxiliary identification number for each and the preset expiration date corresponding to each agricultural product may be stored in correspondence with each other.

Agricultural products Secondary identification number Expiration date agricultural products 1 123321 July 20, 2021 agricultural products 2 234432 July 25, 2021 agricultural products 3 345543 July 28, 2021

When the authentication confirmation message is transmitted to the electronic terminal 131 by the authentication confirmation message transmission unit 117, the remaining period confirmation unit 120 refers to the expiration date information storage unit 119 and stores the first agricultural product. After checking the information on the corresponding first expiration date, the remaining period from the current time when the authentication confirmation message is transmitted to the electronic terminal 131 to the first expiration date is checked.

When the remaining period is confirmed by the remaining period confirmation unit 120, the information message transmitting unit 121 generates a remaining period information message providing information about the remaining period and transmits it to the electronic terminal 131.

Hereinafter, the operations of the remaining period confirmation unit 120 and the information message transmission unit 121 will be described in detail using an example.

First, on 'July 14, 2021', as 'Agricultural Product 1' was confirmed by the certification confirmation unit 116 to be an agricultural product that has received eco-friendly certification, the certification confirmation message was sent by the certification confirmation message transmission unit 117. Let us assume that is transmitted to the electronic terminal 131.

Then, the remaining period confirmation unit 120 refers to the expiration date information storage unit 119 as shown in Table 2 above, and provides information about the first expiration date corresponding to 'Agricultural product 1', 'July 20, 2021. 'can confirm.

Then, the remaining period confirmation unit 120 determines the remaining period from 'July 14, 2021' to 'July 20, 2021', which is the current point at which the authentication confirmation message is transmitted to the electronic terminal 131. You can check with ‘6 days’.

Then, the information message transmitting unit 121 may generate a remaining period information message that provides information about the remaining period of 6 days and transmit it to the electronic terminal 131.

Through this, the user 130 can consume 'Agricultural Product 1' within the first expiration date after confirming that the remaining period from the current point to the first expiration date corresponding to 'Agricultural Product 1' is '6 days'. there is.

Additionally, according to one embodiment of the present invention, the agricultural product eco-friendly certification confirmation server 110 may further include a confirmation history information generation unit 122 and a registration request unit 123.

When the authentication confirmation message is transmitted to the electronic terminal 131 by the authentication confirmation message transmission unit 117, the confirmation history information generating unit 122 generates a After receiving location information and generating time information about when the first agricultural product is confirmed to be an environmentally friendly certified agricultural product, the location information, the time information, the first primary identification number, and the first auxiliary identification Generates confirmation history information consisting of numbers.

When the confirmation history information is generated by the confirmation history information generation unit 122, the registration request unit 123 generates a transaction including the confirmation history information, and then generates a transaction containing the confirmation history information, and then Randomly selects a first node device, which is one of the node devices 101, 102, 103, 104, 105, and 106, and transmits the transaction to the first node device, while transmitting the transaction to the blockchain network 100 ) sends a registration request to

For example, as in the above-mentioned example, as 'agricultural product 1' is confirmed by the certification confirmation unit 116 to be an agricultural product that has received eco-friendly certification, the certification confirmation message transmission unit 117 confirms that 'agricultural product 1' is eco-friendly certified. Let us assume that an authentication confirmation message indicating that the agricultural product has been received is sent to the electronic terminal 131.

Then, the confirmation history information generation unit 122 can receive location information of the point where the electronic terminal 131 is located from the electronic terminal 131, and the point in time when it is confirmed that 'agricultural product 1' is an agricultural product that has received eco-friendly certification. Time information can be generated.

In relation to this, when the location information is referred to as 'location information 1' and the time information is referred to as 'time information 1', the confirmation history information generator 122 generates 'location information 1', 'time information 1', and ' Confirmation history information consisting of '32123' and '123321' can be created.

Then, the registration request unit 123 generates a transaction including the confirmation history information, and then connects the plurality of node devices 101, 102, 103, 104, 105, and 106 constituting the blockchain network 100. The first node device may be randomly selected.

At this time, when the first node device is called the node device 101, the registration request unit 123 transmits the transaction to the node device 101 and transmits a request for registration of the transaction to the blockchain network 100. You can.

At this time, when the transaction and the registration request are received from the agricultural product eco-friendly certification confirmation server 110, the first node device sends the previous block linked in a chain to the blockchain data stored on the memory of the first node device. As a basis, a first block containing the transaction is created, and the first block is connected to the blockchain data as a chain, thereby completing storage of the first block through the blockchain network 100. The first block is propagated to the remaining node devices except the first node device among the plurality of node devices 101, 102, 103, 104, 105, and 106.

For example, as in the above-mentioned example, the first node device is called the node device 101, and the registration request unit 123 transmits the transaction to the node device 101, and the blockchain network 100 of the transaction By transmitting a registration request to the node device 101, when the transaction and the registration request are received, the node device 101 sends a chain to the blockchain data stored on the memory of the node device 101. After completing the storage of the first block by creating a first block containing the transaction and linking the first block to the blockchain data as a chain, based on the previous block connected to the blockchain, The first block is transmitted to a plurality of node devices (101, 102, 103, 104, 105, 106) through a network, except for the node device (101). It can be spread by.

Specifically, when the node device 101 receives the transaction and the registration request from the agricultural product eco-friendly certification confirmation server 110, the node device 101 includes the transaction by referring to the block header of the previous block linked to the blockchain data in a chain. The first block, which is a new block, can be created. Then, the node device 101 connects the first block to the blockchain data in a chain, so that after completing storage of the first block, the node device 101 transfers the first block to the remaining nodes through the blockchain network 100. It can propagate to devices 102, 103, 104, 105, and 106.

In this way, when the authentication confirmation message is completely transmitted to the electronic terminal 131, the agricultural product eco-friendly certification confirmation server 110 according to the present invention generates the confirmation history information and registers it in the blockchain network 100, thereby A manager who sells can check this verification history information and monitor information about the time when agricultural products were sold and information about the location of the user 130 who purchased the agricultural products.

Figure 3 is a flowchart showing the operation method of the agricultural product eco-friendly certification confirmation server that checks whether the agricultural product is eco-friendly certified agricultural product based on a two-dimensional code according to an embodiment of the present invention.

In step S310, a plurality of agricultural products pre-designated as eco-friendly certified agricultural products (each of the plurality of agricultural products includes a main identification number of n (n is a natural number of 2 or more) digits and k ( k is a natural number of 2 or more) A auxiliary identification number of 2 digits is pre-assigned, and on the packaging of each of the plurality of agricultural products, a two-dimensional code in which the main identification number for each agricultural product is inserted, and a auxiliary identification for each agricultural product number is pre-printed) and a secondary identification number for each of the plurality of agricultural products, and a preset authentication token for each of the plurality of agricultural products (the authentication token is sent to the preset token generation function, and the primary identification number and secondary identification number for each agricultural product means the output value calculated by being applied as an input) maintains a complex information storage unit in which the values are stored in correspondence with each other.

In step S320, when a request for confirmation as to whether the first agricultural product is an agricultural product that has received eco-friendly certification is received from the electronic terminal of the user who purchased the first agricultural product, which is one of the plurality of agricultural products, the electronic terminal is sent Request transmission of an auxiliary identification number for the first agricultural product.

In step S330, when the first auxiliary identification number printed on the packaging of the first agricultural product is received from the electronic terminal in response to a request for transmission of the auxiliary identification number for the first agricultural product, the complex information storage unit The first authentication token stored corresponding to the first auxiliary identification number is extracted from.

In step S340, when the first authentication token is extracted, transmission of the main identification number inserted in the two-dimensional code printed on the packaging of the first agricultural product is requested to the electronic terminal.

In step S350, in response to a request to transmit the state identification number for the first agricultural product, the electronic terminal recognizes the two-dimensional code printed on the packaging of the first agricultural product to obtain the state identification number for the first agricultural product. As the first primary identification number is extracted, when the first primary identification number is received from the first electronic terminal, the first primary identification number and the first auxiliary identification number are applied as input to the token generation function. This produces an authentication token for verification.

In step S360, when the authentication token for verification is calculated, it is checked whether the authentication token for verification is the same as the first authentication token, and if it is confirmed that the authentication token for verification is the same as the first authentication token. , Confirm that the first agricultural product is an agricultural product that has received eco-friendly certification.

In step S370, when it is confirmed that the first agricultural product is an agricultural product that has received eco-friendly certification, a certification confirmation message indicating that the first agricultural product is an agricultural product that has received eco-friendly certification is generated and transmitted to the electronic terminal.

At this time, according to one embodiment of the present invention, when the n-digit primary identification number and k-digit auxiliary identification number pre-assigned to any one agricultural product among the plurality of agricultural products are applied as input, the token generation function inputs By calculating the Kronecker product between a column vector whose components are n numbers constituting the n-digit primary identification number applied as input, and a row vector whose components are k numbers constituting the k-digit auxiliary identification number applied as input, It may be a function that generates an operation matrix of size n x k and then calculates the Euclidean norm of the operation matrix as an authentication token corresponding to one of the agricultural products.

In addition, according to one embodiment of the present invention, the operating method of the agricultural product eco-friendly certification confirmation server stores pre-produced video content introducing the entire production process in an eco-friendly manner until the plurality of agricultural products receive eco-friendly certification. It may further include the step of maintaining a video content storage unit, and at this time, in step S370, if it is confirmed that the first agricultural product is an agricultural product that has received eco-friendly certification, the video content is downloaded from the video content storage unit. After generating download path information and generating a download guide message and the authentication confirmation message including the download path information, the download guide message and the authentication confirmation message can be transmitted to the electronic terminal.

In addition, according to an embodiment of the present invention, the operating method of the agricultural product eco-friendly certification confirmation server is such that the auxiliary identification number for each of the plurality of agricultural products and information on the preset expiration date corresponding to each agricultural product correspond to each other. A step of maintaining a stored expiration date information storage unit. When the authentication confirmation message is transmitted to the electronic terminal in step S370, the first distribution corresponding to the first agricultural product is performed with reference to the expiration date information storage unit. After confirming the information about the expiration date, confirming the remaining period from the current time when the authentication confirmation message is transmitted to the electronic terminal to the first expiration date, and when the remaining period is confirmed, information about the remaining period is provided. The method may further include generating a remaining period information message and transmitting it to the electronic terminal.

In addition, according to an embodiment of the present invention, when the authentication confirmation message is transmitted to the electronic terminal in step S370, location information of the point where the electronic terminal is located is received from the electronic terminal, and the first 1 After generating time information about the time when the agricultural product was confirmed to be an eco-friendly certified agricultural product, generating confirmation history information consisting of the location information, the time information, the first main identification number, and the first auxiliary identification number When the confirmation history information is generated, a transaction including the confirmation history information is created, and then a first node device, which is one of a plurality of node devices constituting the blockchain network, is randomly selected, While transmitting the transaction to the first node device, it may further include transmitting a request for registration of the transaction to the blockchain network, wherein the first node device receives from the agricultural product eco-friendly certification confirmation server, When the transaction and the registration request are received, a first block containing the transaction is generated based on a previous block chained to blockchain data stored on the memory of the first node device, and the first block is generated. By chaining a block to the blockchain data, after completing storage of the first block, the first block is transferred through the blockchain network, excluding the first node device among the plurality of node devices. It can propagate to the remaining node devices.

Above, with reference to FIG. 3, the operation method of the agricultural product eco-friendly certification confirmation server that checks whether the agricultural product is an agricultural product that has received eco-friendly certification based on a two-dimensional code according to an embodiment of the present invention has been described. Here, the operation method of the agricultural product eco-friendly certification confirmation server that checks whether the agricultural product is an environmentally friendly certified agricultural product based on a two-dimensional code according to an embodiment of the present invention is the agricultural product described using FIGS. 1 and 2. Since this may correspond to the configuration of the operation of the eco-friendly certification confirmation server 110, a more detailed description thereof will be omitted.

A method of operating an agricultural product eco-friendly certification confirmation server that checks whether agricultural products are eco-friendly certified agricultural products based on a two-dimensional code according to an embodiment of the present invention involves storing a storage medium for execution through combination with a computer. It can be implemented as a stored computer program.

In addition, the method of operating the agricultural product eco-friendly certification confirmation server, which checks whether the agricultural product is an eco-friendly certified agricultural product based on a two-dimensional code according to an embodiment of the present invention, includes a computer for execution through combination with a computer. It may be implemented in the form of program instructions and recorded on a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, etc., singly or in combination. Program instructions recorded on the medium may be specially designed and constructed for the present invention or may be known and usable by those skilled in the art of 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 optical media (magneto-optical media) and hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, flash memory, etc. Examples of program instructions include machine language code, such as that produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter, etc.

As described above, the present invention has been described with specific details such as specific components and limited embodiments and drawings, but this is only provided to facilitate a more general understanding of the present invention, and the present invention is not limited to the above embodiments. , those skilled in the art can make various modifications and variations from this description.

Accordingly, the spirit of the present invention should not be limited to the described embodiments, and the scope of the patent claims described below as well as all modifications that are equivalent or equivalent to the scope of this patent claim shall fall within the scope of the spirit of the present invention. .

110: Agricultural product eco-friendly certification confirmation server that checks whether the agricultural product is an eco-friendly certified agricultural product based on a two-dimensional code
111: Complex information storage unit 112: Secondary identification number request unit
113: Authentication token extraction unit 114: Main identification number request unit
115: token calculation unit 116: authentication confirmation unit
117: Authentication confirmation message transmission unit 118: Video content storage unit
119: Expiration date information storage unit 120: Remaining period confirmation unit
121: Information message transmission unit 122: Confirmation history information generation unit
123: Registration request section
100: Blockchain network
101, 102, 103, 104, 105, 106: multiple node devices
130: user
131: Electronic terminal

Claims (12)

In the agricultural product eco-friendly certification confirmation server that checks whether the agricultural product is an eco-friendly certified agricultural product based on a two-dimensional code,
A plurality of agricultural products pre-designated as eco-friendly certified agricultural products - Each of the plurality of agricultural products includes a main identification number of n (n is a natural number of 2 or more) digits and k (k is a natural number of 2 or more) for identification of each agricultural product. A auxiliary identification number of several digits is pre-allocated, and on the packaging of each of the plurality of agricultural products, a two-dimensional code in which the main identification number for each agricultural product is inserted and a auxiliary identification number for each agricultural product are pre-printed. - A secondary identification number for each, and a preset authentication token for each of the plurality of agricultural products - The authentication token is input to a preset token generation function with the main identification number and secondary identification number for each agricultural product. refers to the calculated output value - a complex information storage unit in which these are stored in correspondence with each other;
When a request for confirmation as to whether the first agricultural product is an environmentally friendly certified agricultural product is received from the electronic terminal of a user who has purchased a first agricultural product among the plurality of agricultural products, the first agricultural product is sent to the electronic terminal. a secondary identification number request unit that requests transmission of a secondary identification number;
In response to a request to transmit an auxiliary identification number for the first agricultural product, when the first auxiliary identification number printed on the packaging of the first agricultural product is received from the electronic terminal, the first auxiliary identification number is transmitted from the complex information storage unit. an authentication token extraction unit that extracts a first authentication token stored in correspondence to an identification number;
When the first authentication token is extracted, a state identification number request unit that requests transmission of the state identification number inserted in the two-dimensional code printed on the packaging of the first agricultural product to the electronic terminal;
In response to a request to transmit the state identification number for the first agricultural product, in the electronic terminal, the two-dimensional code printed on the packaging of the first agricultural product is recognized to identify the first state, which is the state identification number for the first agricultural product. As the number is extracted, when the first primary identification number is received from the electronic terminal, the first primary identification number and the first auxiliary identification number are applied as input to the token generation function to calculate an authentication token for verification. Token calculation unit;
When the authentication token for verification is calculated, it is checked whether the authentication token for verification is the same as the first authentication token, and if it is confirmed that the authentication token for verification is the same as the first authentication token, the first agricultural product A certification confirmation department that verifies that the agricultural products have received this eco-friendly certification;
a certification confirmation message transmitting unit that, when it is confirmed that the first agricultural product is an agricultural product that has received eco-friendly certification, generates a certification confirmation message indicating that the first agricultural product is an agricultural product that has received eco-friendly certification and transmits it to the electronic terminal;
When the authentication confirmation message is transmitted to the electronic terminal by the authentication confirmation message transmission unit, location information of the point where the electronic terminal is located is received from the electronic terminal, and the first agricultural product is an agricultural product that has received eco-friendly certification. a confirmation history information generating unit that generates time information about a point in time at which confirmation was confirmed, and then generates confirmation history information consisting of the location information, the time information, the first primary identification number, and the first auxiliary identification number; and
When the confirmation history information is generated, a transaction including the confirmation history information is created, and then a first node device, which is one of a plurality of node devices constituting the blockchain network, is randomly selected, and the first node device is randomly selected. A registration request unit that transmits a request for registration of the transaction to the blockchain network while transmitting the transaction to the node device.
Including,
The token creation function is
When the n-digit main identification number and k-digit auxiliary identification number pre-allocated to any one of the plurality of agricultural products are input, n numbers constituting the n-digit main identification number applied as input are entered. After calculating the Kronecker product between the column vector as a component and the row vector as components of the k numbers constituting the k-digit auxiliary identification number applied as input, an operation matrix of nxk size is generated, It is a function that calculates the Euclidean Norm of the operation matrix with an authentication token corresponding to one of the above agricultural products,
The first node device is
When the transaction and the registration request are received from the agricultural product eco-friendly certification confirmation server, based on the previous block chained to the blockchain data stored on the memory of the first node device, the first node containing the transaction After completing storage of the first block by creating a block and connecting the first block to the blockchain data as a chain, the first block is sent to the plurality of node devices through the blockchain network. An agricultural product eco-friendly certification confirmation server, characterized in that it propagates to the remaining node devices except the first node device. delete According to paragraph 1,
A video content storage unit that stores pre-produced video content introducing the entire production process in an eco-friendly manner until the plurality of agricultural products receive eco-friendly certification.
It further includes,
The authentication confirmation message transmission unit
When it is confirmed that the first agricultural product is an agricultural product that has received eco-friendly certification, download path information for downloading the video content from the video content storage unit is generated, and a download guide message including the download path information and the certification confirmation message are generated. After generating, the agricultural product eco-friendly certification confirmation server characterized in that it transmits the download guide message and the certification confirmation message to the electronic terminal. According to paragraph 1,
an expiration date information storage unit in which auxiliary identification numbers for each of the plurality of agricultural products and information on a preset expiration date corresponding to each agricultural product are stored in correspondence with each other;
When the authentication confirmation message is transmitted to the electronic terminal by the authentication confirmation message transmission unit, information on the first expiration date corresponding to the first agricultural product is confirmed with reference to the expiration date information storage unit, and then the authentication a remaining period confirmation unit that checks the remaining period from the current point at which the confirmation message is transmitted to the electronic terminal to the first expiration date; and
When the remaining period is confirmed, a guidance message transmission unit generates a remaining period guidance message providing information about the remaining period and transmits it to the electronic terminal.
An agricultural product eco-friendly certification confirmation server that further includes. delete In a method of operating an agricultural product eco-friendly certification confirmation server that checks whether agricultural products are eco-friendly certified agricultural products based on a two-dimensional code,
A plurality of agricultural products pre-designated as eco-friendly certified agricultural products - Each of the plurality of agricultural products includes a main identification number of n (n is a natural number of 2 or more) digits and k (k is a natural number of 2 or more) for identification of each agricultural product. A auxiliary identification number of several digits is pre-allocated, and on the packaging of each of the plurality of agricultural products, a two-dimensional code in which the main identification number for each agricultural product is inserted and a auxiliary identification number for each agricultural product are pre-printed. - A secondary identification number for each, and a preset authentication token for each of the plurality of agricultural products - The authentication token is input to a preset token generation function with the main identification number and secondary identification number for each agricultural product. Means the calculated output value - maintaining a complex information storage unit in which these are stored in correspondence with each other;
When a request for confirmation as to whether the first agricultural product is an environmentally friendly certified agricultural product is received from the electronic terminal of a user who has purchased a first agricultural product among the plurality of agricultural products, the first agricultural product is sent to the electronic terminal. requesting transmission of an auxiliary identification number for;
In response to a request to transmit an auxiliary identification number for the first agricultural product, when the first auxiliary identification number printed on the packaging of the first agricultural product is received from the electronic terminal, the first auxiliary identification number is transmitted from the complex information storage unit. extracting a first authentication token stored in correspondence with the identification number;
When the first authentication token is extracted, requesting transmission of the main identification number inserted in the two-dimensional code printed on the packaging of the first agricultural product to the electronic terminal;
In response to a request to transmit the state identification number for the first agricultural product, in the electronic terminal, the two-dimensional code printed on the packaging of the first agricultural product is recognized to identify the first state, which is the state identification number for the first agricultural product. As the number is extracted, when the first primary identification number is received from the electronic terminal, the first primary identification number and the first auxiliary identification number are applied as input to the token generation function to calculate an authentication token for verification. steps;
When the authentication token for verification is calculated, it is checked whether the authentication token for verification is the same as the first authentication token, and if it is confirmed that the authentication token for verification is the same as the first authentication token, the first agricultural product Confirming that this agricultural product has received eco-friendly certification;
When it is confirmed that the first agricultural product is an agricultural product that has received eco-friendly certification, generating a certification confirmation message indicating that the first agricultural product is an agricultural product that has received eco-friendly certification and transmitting it to the electronic terminal;
By generating the authentication confirmation message and transmitting it to the electronic terminal, when the authentication confirmation message is transmitted to the electronic terminal, location information of the point where the electronic terminal is located is received from the electronic terminal, and the first After generating time information about the time when the agricultural product was confirmed to be an eco-friendly certified agricultural product, generating confirmation history information consisting of the location information, the time information, the first main identification number, and the first auxiliary identification number. step; and
When the confirmation history information is generated, a transaction including the confirmation history information is created, and then a first node device, which is one of a plurality of node devices constituting the blockchain network, is randomly selected, and the first node device is randomly selected. transmitting a request for registration of the transaction to the blockchain network while transmitting the transaction to a node device
Including,
The token creation function is
When the n-digit main identification number and k-digit auxiliary identification number pre-allocated to any one of the plurality of agricultural products are input, n numbers constituting the n-digit main identification number applied as input are entered. After calculating the Kronecker product between the column vector as a component and the row vector as components of the k numbers constituting the k-digit auxiliary identification number applied as input, an operation matrix of nxk size is generated, It is a function that calculates the Euclidean Norm of the operation matrix with an authentication token corresponding to one of the above agricultural products,
The first node device is
When the transaction and the registration request are received from the agricultural product eco-friendly certification confirmation server, based on the previous block chained to the blockchain data stored on the memory of the first node device, the first node containing the transaction After completing storage of the first block by creating a block and connecting the first block to the blockchain data as a chain, the first block is sent to the plurality of node devices through the blockchain network. A method of operating an agricultural product eco-friendly certification confirmation server, characterized in that it propagates to the remaining node devices except the first node device. delete According to clause 6,
Maintaining a video content storage unit that stores pre-produced video content introducing the entire production process in an eco-friendly manner until the plurality of agricultural products receive eco-friendly certification.
It further includes,
The step of generating the authentication confirmation message and transmitting it to the electronic terminal is
When it is confirmed that the first agricultural product is an agricultural product that has received eco-friendly certification, download path information for downloading the video content from the video content storage unit is generated, and a download guide message including the download path information and the certification confirmation message are generated. A method of operating an agricultural product eco-friendly certification confirmation server, characterized in that after generating, transmitting the download guide message and the authentication confirmation message to the electronic terminal. According to clause 6,
maintaining an expiration date information storage unit in which auxiliary identification numbers for each of the plurality of agricultural products and information on a preset expiration date corresponding to each agricultural product are stored in correspondence with each other;
By generating the authentication confirmation message and transmitting it to the electronic terminal, when the authentication confirmation message is transmitted to the electronic terminal, referring to the expiration date information storage unit, the first expiration date corresponding to the first agricultural product After confirming the information, checking the remaining period from the current time when the authentication confirmation message is transmitted to the electronic terminal to the first expiration date; and
When the remaining period is confirmed, generating a remaining period information message providing information about the remaining period and transmitting it to the electronic terminal.
A method of operating an agricultural product eco-friendly certification confirmation server further comprising: delete A computer-readable recording medium recording a computer program for executing the method of any one of claims 6, 8, or 9 through combination with a computer. A computer program stored in a storage medium for executing the method of any one of paragraphs 6, 8, or 9 through combination with a computer.

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