KR102638915B1 - Method for generating high-density two-dimensional security code and preventing forgery and falsification - Google Patents

Abstract

The present invention provides a high-density two-dimensional security code generation device comprising: setting a barcode area for encoding data using a plurality of pixels with alternating brightness and darkness; Setting a blank data area in the barcode area in which data will not be encoded; Encoding data in the barcode area excluding the blank data area using a plurality of pixels; and generating a high-density two-dimensional security code by placing a physical security element used for high-density two-dimensional security code authentication in a blank data area.

Description

Method for generating high-density two-dimensional security code and preventing forgery and falsification {METHOD FOR GENERATING HIGH-DENSITY TWO-DIMENSIONAL SECURITY CODE AND PREVENTING FORGERY AND FALSIFICATION}

The present invention relates to a high-density two-dimensional security code and a technology that can prevent forgery and alteration of digital stamps using the high-density two-dimensional security code. In particular, it prevents the forgery and alteration of a two-dimensional barcode containing information about the production and distribution process that a specific product has gone through. It is for this purpose.

The conventional two-dimensional barcode has largely solved the information capacity limitation problem of the one-dimensional barcode, and data recovery is possible even if part of the code is damaged, and general users can decode data through terminals such as smartphones, making it highly useful. There is an advantage.

These characteristics of two-dimensional barcodes facilitate the management and provision of data, and have been used to manage production and distribution history data of specific products.

Meanwhile, a two-dimensional barcode containing detailed product information can be used for the purpose of tracking the production and distribution history of a specific product, but abuse cases of forgery and falsification of the two-dimensional barcode, such as copying the shape of the two-dimensional barcode, may occur, making it less secure. This can be said to be low.

Currently, if a two-dimensional barcode is forged or altered during the production or distribution process of a product, it is difficult to confirm this fact through inspection, so it can be said that a method that can easily manage product data while improving security is needed.

Accordingly, the inventor of the present invention completed the present invention after a long period of research and development through trial and error in order to solve the above-mentioned problems.

In order to solve the problems described above, the purpose of the present invention is to provide a method for preventing forgery and alteration of data by generating a high-density two-dimensional security code containing physical security elements that cannot be forged or altered.

The technical problems to be achieved in the present invention are not limited to the above technical problems, and other technical problems not mentioned will be clearly understood by those skilled in the art from the description below.

One aspect of the present invention to solve the above-described problem is to provide a high-density two-dimensional security code generation device comprising: setting a barcode area for encoding data using a plurality of pixels with alternating brightness and darkness; Setting a blank data area in the barcode area in which data will not be encoded; Encoding data in the barcode area excluding the blank data area using a plurality of pixels; and a step of generating a high-density two-dimensional security code by placing a physical security element used for high-density two-dimensional security code authentication in the blank data area.

According to a preferred embodiment of the present invention, it includes the step of generating a physical security element, and the step of generating the physical security element includes the step of generating a first security element composed of an array of microcharacters of a certain size or less, The first security element is composed of lines or dots of a certain size or less, so if a forger copies it and reprints it through a printing device, the original form of the microcharacter is destroyed and can be used to determine whether it has been forged or altered.

According to a preferred embodiment of the present invention, the step of creating the first security element includes setting the width and length of the physical security element; It may include the step of creating a three-dimensional shape by stacking a plurality of fine character arrays corresponding to a set length by a set width.

According to a preferred embodiment of the present invention, the step of generating a three-dimensional shape includes the step of giving curvature so that the microcharacter array corresponding to the set length proceeds in a curved shape; Setting the letter spacing of fine characters to change according to the curvature given to the fine character array; And it may include the step of creating a three-dimensional shape by stacking an array of fine characters in which light and dark are formed by changing letter spacing.

According to a preferred embodiment of the present invention, the step of setting the letter spacing of fine characters to change includes forming contrast in the fine character array by setting the letter spacing to be maximum or minimum in the section where the curvature given to the fine character array is maximum. It can be included.

According to a preferred embodiment of the present invention, the step of creating a physical security element includes generating a second security element, which is a character surrounded by a first security element and forming a boundary, and the second security element is of a certain size or less. Since it is surrounded by a first security element composed of lines or dots, if a counterfeiter copies the physical security element including the first security element and the second security element and reprints it through a printing device, the border is destroyed and forms an angled or angular shape. Because it is formed in the form of stairs, it can be used to determine whether it has been forged or altered.

According to a preferred embodiment of the present invention, generating a unique identification code to be assigned to a high-density two-dimensional security code with data encoded in the barcode area; Arranging a unique identification code adjacent to the barcode area; And it may include the step of encoding data for the unique identification code in the barcode area.

One aspect of the present invention to solve the above-described problem is a high-density two-dimensional security code scanning terminal: scanning the high-density two-dimensional security code generated by the generating device of claim 1; Generating a first image including a high-density two-dimensional security code for verification that can be compared with the scanned high-density two-dimensional security code; generating a second image by photographing the scanned high-density two-dimensional security code; Verifying the scanned high-density two-dimensional security code by comparing the high-density two-dimensional security code included in each of the first image and the second image; And it may include the step of decoding data of the verified high-density two-dimensional security code.

According to a preferred embodiment of the present invention, the step of verifying the high-density two-dimensional security code includes comparing and verifying the physical security elements of paragraph 1 included in each of the high-density two-dimensional security code of the first image and the high-density two-dimensional security code of the second image. Comprising: Comparing and verifying the physical security elements includes verifying the original state of preservation of the microcharacters included in the first security element of paragraph 2; And it may include the step of verifying the preservation state of the boundary surface of the second security element of paragraph 6.

According to a preferred embodiment of the present invention, the step of verifying the high-density two-dimensional security code includes comparing and verifying the unique identification code of paragraph 5 included in each of the high-density two-dimensional security code of the first image and the high-density two-dimensional security code of the second image. may include.

The present invention has the effect of preventing damage due to data forgery and falsification by generating a high-density two-dimensional security code in a form that is difficult to copy.

In particular, since the entity issuing the high-density two-dimensional security code containing the physical security element of the present invention is identified as one or a small number due to technical barriers, it is possible to prevent forgery and falsification such as unauthorized reproduction of the high-density two-dimensional security code and the digital certificate containing the same. You can.

Additionally, security can be further improved by limiting the terminals capable of decoding the high-density two-dimensional security code to those installed with an application dedicated to the high-density two-dimensional security code.

Meanwhile, it is to be added that even if the effects are not explicitly mentioned herein, the effects described in the following specification and their potential effects expected from the technical features of the present invention are treated as if described in the specification of the present invention.

1 is a flowchart illustrating a method for generating a high-density two-dimensional security code according to the present invention.
Figure 2 is a reference diagram for explaining the form of a high-density two-dimensional security code according to an embodiment of the present invention.
Figure 3 is a reference diagram for specifically explaining the physical security element of the present invention.
Figure 4 is a reference diagram showing a digital stamp containing a high-density two-dimensional security code of the present invention.
Figure 5 is a flowchart explaining the high-density two-dimensional security code decoding method according to the present invention.
Figure 6 is a reference diagram showing a search pattern of a high-density two-dimensional security code according to an embodiment of the present invention.

In describing the present invention, detailed descriptions of related known functions will be omitted if they are obvious to those skilled in the art and are judged to unnecessarily obscure the gist of the present invention.

The system of the present invention and a device implementing the same may be implemented by a computer including one or more processors, memory, etc. Examples of computers may include various devices such as personal computers, server computers, smartphones, tablets, and wearable devices. At this time, the computer can be expressed as a user terminal, service terminal, service server, etc. depending on the user.

In this specification, terms such as 'part', 'module', 'component', and 'interface' relate to a computer-related entity and may mean hardware, a combination of hardware and software, or software. For example, 'communication unit' and 'communication module' may refer to hardware that performs communication functions, a combination of hardware and software, or software.

The high-density two-dimensional security code according to the present invention is generated by a high-density two-dimensional security code generating device. Additionally, the high-density two-dimensional security code generating device may include a computing device for digitally constructing the high-density two-dimensional security code and an output device for outputting the configured high-density two-dimensional security code.

FIG. 1 is a flowchart for explaining a method for generating a high-density two-dimensional security code according to the present invention, and FIG. 2 is a reference diagram for explaining the form of a high-density two-dimensional security code according to an embodiment of the present invention.

Referring to FIG. 1, a barcode area for encoding data can be set using a plurality of pixels with alternating brightness and darkness (S200).

Specifically, referring to (a) of FIG. 2, the barcode area 110 of the high-density two-dimensional security code 100 is an area for encoding data using the above-described pixels, and is used in the field of use of the high-density two-dimensional security code 100 and The size can be determined depending on the amount of information required.

Once the barcode area 110 of the high-density two-dimensional security code 100 is set, a blank data area 120 in which data will not be encoded can be set among the barcode area 110 (S210).

Here, the barcode area 110 is preferably set to a size that takes into account the area occupied by the blank data area 120 inside the barcode area.

Additionally, referring to (b) and (c) of FIG. 2, the blank data area 120 may be set to be located in the center of the barcode area 110, and may be set to be located at the edge of the barcode area 110. It may be possible. The blank data area 120 can be set to a size corresponding to the shape of the physical security element 130, which will be described later, if it is preset.

When the blank data area 120 is set, data is encoded in the barcode area excluding the blank data area using a plurality of pixels (S220), and a physical security element used for high-density two-dimensional security code authentication is placed in the blank data area 120 ( 130) can be placed (S230).

Here, the order of data encoding in the barcode area and arrangement of the physical security element 130 does not matter which task is performed, but depending on the form of the physical security element 130, it may be different from (b) or (c) of Figure 2. Likewise, the barcode area where data is encoded may be partially invaded.

In this case, the physical security element 130 may be arranged and output in a form that covers the pixel data so that a high-density two-dimensional security code verification means or an inspector can observe and verify the shape of the physical security element 130 in more detail.

In addition, when the physical security element 130 partially invades the barcode area where data is encoded, the blank data area 120 is located at the edge of the barcode area 110, as shown in (c) of FIG. 2. The area can be minimized. By minimizing the above-mentioned invasion area, metadata that is not properly scanned in a conventionally large invasion area can be scanned, and the possibility of data restoration using metadata can be improved when part of the high-density two-dimensional security code is damaged.

Figure 3 is a reference diagram for specifically explaining the physical security element of the present invention.

Referring to FIG. 3, the physical security element 130 may include a first security element 131 and a second security element 132.

The first security element 131 is composed of an array of microcharacters of a certain size or less. For example, the first security element 131 may be composed of a fine character array in which letters such as “KOR” of a certain size or less are sequentially arranged, or may be composed of an array of specific images rather than letters.

The first security element 131 allows authentication of the high-density two-dimensional security code to be performed through a means that can determine whether or not intact fine characters have been formed. The determination means may include a high-density two-dimensional security code scanning terminal or an optical device available to the inspector.

The first security element 131 can be created to correspond to the width and length of the physical security element 130 once they are set.

According to one embodiment of the present invention, the first security element 131 can be created through a method of forming a three-dimensional shape by stacking a plurality of microcharacter arrays corresponding to the length of the set physical security element by a set width. .

Here, a three-dimensional shape refers to a shape that is expressed in two dimensions but visually gives the impression of a three-dimensional shape. For example, the shape of the physical security element is set by setting the width, length, and shape of the physical security element 130, and stacking a plurality of fine character arrays corresponding to the length of the set physical security element by the width of the set physical security element. However, instead of stacking fine character arrays that progress in a straight line, a three-dimensional shape can be formed by stacking fine character arrays that progress in a curved shape by giving a curvature.

In addition, when stacking a fine character array that proceeds in a curved shape, left and right inclinations are given to each fine character to correspond to the curvature of the fine character array, so that the upper and lower boundaries 133 of the fine character array are curved in an angled or stepped shape. You can avoid losing.

Additionally, the letter spacing of fine characters can be set to change depending on the curvature given to the fine character array.

When applying letter spacing to an array of fine characters, it is possible to create a three-dimensional shape by stacking an array of fine letters whose light and dark sides are formed by changing letter spacing.

For example, it is possible to create contrast in the fine character array by setting the letter spacing to be maximum or minimum in the section where the curvature given to the fine character array is maximum. Referring to FIG. 3, the center of the boundary surface 133 indicated by a dotted line is the section where the curvature of the fine character array is maximum, and the letter spacing is set to the maximum to express the bright part, and in the next maximum curvature section, the letter spacing is set to the minimum. It can be set to express dark parts.

The second security element 132 includes a character whose border is formed by being surrounded by the first security element, and FIG. 3 shows an example of the letter “K” formed by being surrounded by microcharacters arranged on the first security element.

The second security element 132 can enable authentication of the high-density two-dimensional security code through a means that can determine whether an intact character boundary is formed. The determination means is the same as the means for determining and verifying the first security element.

The physical security element, including the first security element and the second security element, prevents groups or users other than the entity issuing the high-density two-dimensional security code from duplicating the high-density two-dimensional security code through the technical barrier of microcharacter printing technology. do.

For example, the first security element is composed of lines or dots of a certain size or less, so when a forger copies it and reprints it through a printing device, the original form of the microcharacters is destroyed and can be used to determine whether it has been forged or altered.

In addition, since the second security element is surrounded by a first security element composed of lines or dots of a certain size or less, a counterfeiter copies the physical security element including the first security element and the second security element and reprints it through a printing device. In this case, the boundary surface is destroyed and formed into an angled or stepped shape, which can be used to determine whether or not there has been forgery or alteration.

Figure 4 is a reference diagram showing a digital stamp containing a high-density two-dimensional security code of the present invention.

Referring to Figure 4, the high-density two-dimensional security code 100 of the present invention can be used in a digital stamp 200 issued to track product history, such as production and distribution of the above-mentioned product.

Additionally, according to an embodiment of the present invention, the high-density two-dimensional security code 100 may include a unique identification code 140.

When a high-density two-dimensional security code is generated, a unique identification code can be immediately assigned, and the unique identification code can be placed adjacent to the barcode area 110 and output together.

As shown in Figure 4, when a unique identification code is assigned to a high-density two-dimensional security code, data for the unique identification code assigned to the barcode area can be encoded.

Accordingly, when verification is performed by scanning the high-density two-dimensional security code through a scanning terminal, the unique identification code can be searched by decoding the scanned high-density two-dimensional security code, and the searched unique identification code is the actual high-density two-dimensional security code. If it is different from the included unique identification code, it can be confirmed that the actual high-density two-dimensional security code has been forged or altered.

For example, the scanning terminal can check the image of the two-dimensional code through the application, and compare the high-density two-dimensional security code that is the scan target with the high-density two-dimensional security code output as an image.

Decoding of the high-density two-dimensional security code according to the present invention can be performed by a high-density two-dimensional security code scanning terminal. The scanning terminal may be installed with a dedicated application for identifying, verifying, and decoding the high-density two-dimensional security code, and may include a separate imaging device for photographing the high-density two-dimensional security code.

Figure 5 is a flowchart explaining the high-density two-dimensional security code decoding method according to the present invention.

Referring to Figure 5, the scanning terminal scans the high-density two-dimensional security code generated by the high-density two-dimensional security code generating device (S600).

The scanning terminal generates a first image containing a high-density two-dimensional security code for verification that can be compared with the scanned high-density two-dimensional security code (S610).

A second image is generated by photographing the high-density two-dimensional security code scanned by the scanning terminal (S620).

The scanning terminal verifies the scanned high-density two-dimensional security code by comparing the high-density two-dimensional security code included in each of the first image and the second image (S630).

The scanning terminal decodes the data of the verified high-density two-dimensional security code (S640).

Here, the process of verifying the high-density two-dimensional security code can be accomplished as follows.

(1) Verify the original state of preservation of the microcharacters included in the first security element.

(2) Verify the preservation status of the boundary surface of the second security element.

(3) Verify whether the unique identification codes of the first image and the second image match by comparing the unique identification codes placed adjacent to the barcode area.

Here, the process (1) may include the process of verifying whether the three-dimensional shape of the physical security element has been completely implemented by verifying the letter spacing, brightness, and lamination of the fine character array included in the first security element. there is.

In addition, the tasks performed by the scan terminal in addition to the above-described process are described in detail as follows.

First, the scanning terminal scans the high-density two-dimensional security code and then searches for the search pattern of the high-density two-dimensional security code.

Afterwards, the coordinates of the corner points of the search pattern are calculated using the coordinates of the search pattern.

Afterwards, the physical security elements included in the high-density two-dimensional security code are identified and verified.

Afterwards, the coordinates of the position correction marker are searched using the search pattern and corner point coordinates.

Afterwards, the coordinates and data values of the data pattern for each section can be read using the position correction marker. At this time, metadata can be extracted together.

Additionally, in relation to the above-described search pattern, Figure 6 is a reference diagram showing a search pattern of a high-density two-dimensional security code according to an embodiment of the present invention.

Referring to FIG. 6, the search pattern 150 of the high-density two-dimensional security code according to the present invention may include a right triangle shape and a straight line shape spaced apart from each other at a certain distance.

The search pattern 150 is used to search the upper left coordinates of the high-density two-dimensional security code and obtain rotation information of the barcode.

When performing a unidirectional search on one axis (eg, x-axis), the search pattern 150 can be searched even if it is rotated up to +90 degrees.

According to an embodiment of the present invention, the search pattern 150 may be composed of a right triangle shape, a first straight line shape, and a second straight line shape, including the width of the right triangle shape, the distance between the right triangle shape and the first straight line shape, The width of the first straight shape, the gap between the first straight shape and the second straight shape, and the width of the second straight shape may be formed in a ratio of 4:2:2:2:1.

A scan terminal installed with an application for identifying and decoding a high-density two-dimensional security code can identify and decode a high-density two-dimensional security code containing a search pattern formed in the ratio of 4:2:2:2:1 described above.

It is obvious to those skilled in the art that the present invention can be embodied in other specific forms without departing from the characteristics of the present invention. Accordingly, the above detailed description should not be construed as restrictive in all respects and should be considered illustrative. The scope of the present invention should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the present invention are included in the scope of the present invention.

100: High-density two-dimensional security code
110: Barcode area
120: Data blank area
130: Physical security elements
131: First security element
132: Second security element
140: Unique identification number
150: Search pattern
200: Digital stamp

Claims (10)

High-density two-dimensional security code generating device:
Setting a barcode area for encoding data using a plurality of pixels with alternating brightness and darkness;
Setting a blank data area in the barcode area in which data will not be encoded;
Encoding data in the barcode area excluding the blank data area using a plurality of pixels;
Creating a physical security element used for high-density two-dimensional security code authentication;
Generating a unique identification code to be assigned to a high-density two-dimensional security code with data encoded in the barcode area;
Arranging a unique identification code adjacent to the barcode area;
Encoding data about the unique identification code in the barcode area and generating a high-density two-dimensional security code image for verification when the scanning terminal decodes the barcode area, so that the unique identification code can be confirmed; and
It includes the step of generating a high-density two-dimensional security code by placing a physical security element in the blank data area,
The steps for creating a physical security element are:
Generating a first security element composed of an array of microcharacters of a certain size or less; and
It includes the step of generating a second security element, which is a character surrounded by the first security element and forming a boundary surface,
The first security element is
Since it is composed of lines or dots of a certain size or less, if a forger copies it and reprints it through a printing device, the original form of the microcharacter is destroyed and can be used to determine whether it has been forged or altered.
The second security element is
Since it is surrounded by a first security element composed of lines or dots of a certain size or less, if a forger copies the physical security element including the first security element and the second security element and reprints it through a printing device, the boundary is destroyed. It is formed in an angled or stepped shape and can be used to determine whether it has been forged or altered.
The steps to set up a blank data area are:
Including setting the blank data area to be located at the edge of the barcode area,
The steps for generating a high-density two-dimensional security code are:
If a physical security element is created that is not entirely located in the blank data area, part of the physical security element invades the barcode area where data is encoded using multiple pixels, and another part passes through the edge of the barcode area. It includes a step of minimizing identification interference with the barcode area where data is encoded by placing a physical security element so that it protrudes outside the barcode area,
The steps to encode data in the barcode area are:
It includes the step of positioning a search pattern including a right triangle shape and a straight line shape spaced apart from each other at a certain distance in the barcode area,
The search pattern is
It includes a right triangle shape, a first straight line shape, and a second straight line shape,
The width of the right triangle shape, the distance between the right triangle shape and the first straight shape, the width of the first straight shape, the gap between the first straight shape and the second straight shape, and the width of the second straight shape are 4:2:2:2:1 Formed at the rate of
High-density two-dimensional security code
It is decoded only through a scanning terminal installed with an application that enables identification and decoding of high-density two-dimensional security codes located in the barcode area.
Method for generating high-density two-dimensional security code.
delete According to paragraph 1,
The step of creating the first security element is
Setting the width and length of the physical security element; and
Including the step of creating a three-dimensional shape by stacking a plurality of fine character arrays corresponding to a set length by a set width,
Method for generating high-density two-dimensional security code.
According to paragraph 3,
The steps to create a three-dimensional shape are
A step of providing curvature so that the fine character array corresponding to the set length proceeds in a curved shape;
Setting the letter spacing of fine characters to change according to the curvature given to the fine character array; and
Including the step of creating a three-dimensional shape by stacking an array of fine characters in which light and dark are formed by changing letter spacing,
Method for generating high-density two-dimensional security code.
According to paragraph 4,
The steps to set the letter spacing of fine characters to change are:
Including the step of forming contrast in the fine character array by setting the letter spacing to the maximum or minimum in the section where the curvature given to the fine character array is maximum,
Method for generating high-density two-dimensional security code.
delete delete A high-density two-dimensional security code scanning terminal installed with an application capable of identifying and decoding the high-density two-dimensional security code in which the search pattern of paragraph 1 is located in the barcode area of paragraph 1:
Scanning the high-density two-dimensional security code generated by the generating device of claim 1;
Using information obtained through decoding the scanned high-density two-dimensional security code, generating a first image that is a high-density two-dimensional security code for verification that can be compared with the scanned high-density two-dimensional security code;
generating a second image by photographing the scanned high-density two-dimensional security code;
Verifying the high-density two-dimensional security code of the second image by comparing the high-density two-dimensional security code included in each of the first image and the second image; and
Including the step of decoding data of the verified high-density two-dimensional security code,
The steps to verify the high-density two-dimensional security code are:
Comprising the step of comparing and verifying the unique identification code of paragraph 1 included in each of the high-density two-dimensional security code of the first image and the high-density two-dimensional security code of the second image,
How to prevent forgery and alteration of high-density two-dimensional security codes.
According to clause 8,
The steps to verify high-density two-dimensional security code are:
Comprising the step of comparing and verifying the physical security elements of paragraph 1 included in each of the high-density two-dimensional security code of the first image and the high-density two-dimensional security code of the second image,
The steps to compare and verify physical security elements are:
Verifying the original state of preservation of fine characters included in the first security element of paragraph 1; and
Including the step of verifying the boundary preservation state of the second security element of paragraph 1,
How to prevent forgery and alteration of high-density two-dimensional security codes. delete