WO2015152697A1

WO2015152697A1 - Method for generating document and marketable security having counterfeiting/falsification protection function, method for checking counterfeiting/falsification of document and marketable security having counterfeiting/falsification preventing function, method for generating document having counterfeiting preventing means, and a method for checking counterfeiting/falsification

Info

Publication number: WO2015152697A1
Application number: PCT/KR2015/003435
Authority: WO
Inventors: 이중; 나기현; 강태이; 변준석; 정도준
Original assignee: 대한민국(관리부서:행정안전부 국립과학수사연구원장)
Priority date: 2014-04-04
Filing date: 2015-04-06
Publication date: 2015-10-08

Abstract

By a method for generating a document and a marketable security having a counterfeiting/falsification protection function, a method for checking counterfeiting/falsification of a document and a marketable security having a counterfeiting/falsification preventing function, a method for generating a document having a counterfeiting preventing means, and a method for checking counterfeiting/falsification according to the present invention, it is possible to fundamentally prevent counterfeiting/falsification of a printed document and simply check whether the document is original or has been counterfeited/falsified.

Description

How to create documents with securities forgery prevention function and securities, How to check forgery of documents with securities forgery protection function, How to create documents with anti-counterfeiting means, and How to check forgery forgery

The present invention relates to a document with a forgery prevention function and a method of generating securities, a document with a forgery prevention function and a method for checking forgery and alteration of a security, a method for generating a document with a forgery prevention means and a method for checking forgery and alteration, It is possible to check the authenticity of the original of the printed document and to check whether there is a change in the contents, so that the forgery prevention function that can prevent the forgery of the document and the method of generating securities and the forgery prevention function are provided. The present invention relates to a method of confirming forgery and alteration of documents and securities, a method of generating a document provided with anti-counterfeiting means, and a method of checking forgery and alteration.

Handwritten signature or stamping of commonly used paper documents guarantees that they have been signed by a particular person specified by signature or seal and means that the content of the document is also endorsed by that person. Such handwritten signature or stamping method was validated by the fact that the handwriting is different for each person and the form of the stamp cannot be easily copied by others.

However, signatures or stamps can be simulated to some extent by others, and document content is exposed to the outside, so even if someone adds some content to the document content, the handwritten signature or seal remains the same. There is a problem that cannot be proved.

In addition, recently, due to the development of computer technology, there is a problem that it is difficult to distinguish the original and the forged document by copying the signature as it is or by forging the document by computer stamping the stamp.

In order to overcome this problem, an electronic signature scheme for giving an electronic document transmitted through an electronic medium has been introduced and used. Digital signatures can be performed at the same time by signer authentication and signature of electronic documents. Therefore, the receiver who has received the electronic document can determine whether the signature is forged by another person, and can determine whether the contents of the electronic document are maintained as they are when the document signer signs.

FIG. 1 schematically shows an example of a printed document according to the prior art. The printed document 10 generally includes an issuer name (eg, National Institute of Scientific Investigation), a destination 13, and an issue date (15). ), Title, document number (12) is written, the seal of the issuing authority (19) is stamped, and the content (17) of the document is included.

The method of using an electronic signature has been applied to an electronic document mainly transmitted through an electronic medium so far, and the method of guaranteeing the validity of a document through a handwritten signature or a seal is still used offline. The digital signature method automatically performs a series of processes in which a document is generated through an electronic processing means and transmitted to a counterpart through a transmission medium to be verified, but it is checked whether the printed paper document is forged or altered offline. There was a problem that no method was prepared.

As shown in FIG. 2, in general, securities such as money, checks, bills, and the like, issuers, amounts, and dates of occurrence, such as banks, are stamped.

Including the security shown in FIG. 2, the document printed by the color printer is printed with a unique mark of the printing apparatus manufacturer to indicate a serial number or a printing date. The intrinsic mark is printed in a plurality of fine dots with the same pattern repeated and printed in pale yellow so that it is difficult to be visually identified. This is called steganography. The pale yellow is pale yellow (RGB: ＃ F5F0C5, CMYK: 4,2,27,0) or Songhwa color (RGB: ＃ F8E77F, CMYK: 4,4,62,0). For reference, black RGB codes and CMYK codes are # 1D1E23 and "93,89,83,52", respectively.

FIG. 3 shows an example of a QR code which is a kind of two-dimensional code, and FIG. 4 is schematically shown to explain the structure of the QR code shown in FIG. Conventional one-dimensional barcodes can be configured to put only up to 20 numbers of numeric information in a horizontal arrangement, but QR codes can be up to 7,089 characters, up to 4,296 characters, and up to 1,817 characters using horizontal and vertical characters. It is a two-dimensional structure that can record the degree. At best, barcodes could only record information about a particular brand or manufacturer, but a QR code could contain a long sentence Internet address (URL), photo and video information, map information, or business card information. Recently, QR codes are widely used as an important public relations / marketing tool for companies, and are widely used online and offline.

As shown in FIGS. 3 and 4, the QR code has a quadrangular location symbol 31 at three corners, a reference cell 33 at the bottom right of the center, and the remaining area is a data area ( 35). In the data area, Internet addresses (URL), photo and video information, map information, business card information, and the like are printed two-dimensionally.

When the QR code is read by the QR code reader, the code in the data area is decoded into coded information. In the data area, an Internet address (URL), picture and video information, map information, business card information, etc.) is displayed on the display unit. For example, by loading and executing the QR code reader application on the smartphone, the QR code is captured by the camera mounted on the smartphone, and the code of the data area read and decoded is encoded and coded in the coded data area. Is displayed on the display.

In recent years, advances in printing-related equipment such as color printers and scanners, and image processing techniques have made it difficult to visually identify differences from originals when copying published documents. In addition, even when scanning a document, correcting the scanned image by an image correction program such as Photoshop, and printing the modified image, it was not easy to check the modified contents.

As technology that can be used for forgery of such documents is developed and developed, various methods for checking whether a document has been forged are developed in response to this, but a technique for blocking the forgery of a document has not been developed. There was no development of a simple way to verify that the application was successful. Therefore, there is a need for a method that can fundamentally block forgery and alteration of documents, and to quickly and easily check whether or not forgery.

The present invention has been proposed in order to solve the problems of the prior art as described above, a document with a forgery prevention function that can determine whether the printed document is the original document or forgery, and a method of generating securities, forgery and forgery It is an object of the present invention to provide a document with a prevention function and a method of confirming forgery and alteration of securities, a method of generating a document with a counterfeit prevention means, and a method of confirming forgery and alteration.

The present invention is printed through a document printing system comprising a document printing apparatus identification code information, a hash algorithm, a document generating apparatus having a code generating function, and a document printing apparatus connected to the document producing apparatus to print a document; A hash value is generated from the document information and the document printing device identification code information by the hash algorithm (hash value generation step), and a code is generated from the hash value (code generation step), and the code is generated when the document is printed. Provided is a method for generating a document having a forgery prevention function, characterized in that the code generated in the step is printed on the document.

The document creating device further comprises an encryption function through an encryption key; The document information and the document printing device identification code information before the hash value generation step is further encrypted by an encryption key to generate a cipher text (cipher text generation step), in the hash value generation step from the cipher text generated in the cipher text generation step The hash value is generated by a hash algorithm.

In the above, when a document printing command is input to the document creating apparatus by the user, the hash value generating step is executed, and the identification code of the selected document printing apparatus is generated along with the document information through the hash algorithm. .

In the above, when a document printing command is input to the document creating apparatus by the user, the cipher text generation step is executed, and the identification code of the selected document printing apparatus is encrypted together with the document information through the encryption key.

In the above, when a document printing command is input to the document creating apparatus by the user, a document information input window for displaying document information is displayed on the display unit of the document creating apparatus; In the hash value generating step, the information input to the document information input window by the user forms document information, and generates a hash value through a hash algorithm together with the document printing apparatus identification code.

In the above, when a document printing command is input to the document creating apparatus by the user, a document information input window for inputting document information is displayed on the display unit of the document creating apparatus; In the cipher text generation step, the information inputted by the user into the document information input window forms document information and is encrypted using an encryption key together with the document printing apparatus identification code.

In the above, the document printing apparatus identification code information is made by a combination of any one or more of a manufacturer name of the document printing apparatus 130, a serial number of the document printing apparatus 130, and a document printing date obtained from the document creating apparatus 110. It is characterized by.

In the above, the document printing device identification code information is a step of obtaining a document image by scanning a document previously printed by the document printing device (document image acquisition step), the step of converting the document image from RGB image to CMYK image (document image conversion A color selection step of setting a specific color element to 100% and a remaining color element to 0% in the image, generating an identification code from information of pixels constituting the identification code image (identification code generation step); The generated identification code is stored and provided together with the ID of the document printing apparatus in a storage unit forming the document creating apparatus.

In the above, when the document creation program is activated on the display unit forming the document creating device, the document content is input to the document creating program activated through the input unit forming the document creating device, and the print command is input by the user. In the hash value generating step, the document input content is generated as a hash value through a hash algorithm together with an identification code of the document printing apparatus.

In the above, when the document creation program is activated on the display unit forming the document creating device, the document content is input to the document creating program activated through the input unit forming the document creating device, and the print command is input by the user. In the cipher text generation step, the document input content is generated as a cipher text through an encryption key together with an identification code of the document printing apparatus.

The present invention is printed through a document printing system comprising a document printing device identification code information, a hash algorithm, a document generating device having a code generating function, and a document printing device connected to the document producing device; In the document creating apparatus, document information and document printing apparatus identification code information are generated through a hash value generation step (hash value generation step) by a hash algorithm and a code generation step (code generation step) from the hash value. A step of storing a code in a storage unit (code storing step) is executed to provide a forgery / falsification check method of a document having a forgery prevention function, wherein the code is printed together with the document input contents.

The present invention has a hash value generation algorithm and a code generation function, comprising: an input unit connected to a control unit, a display unit connected to the control unit, and a storage unit connected to the control unit; A securities printing apparatus connected to the securities making system and printing the securities; Generating a hash value by the hash value generation algorithm (first hash) of the first data, which is the security information input by the input unit, and the second data, which is the information of the security printing apparatus, and a two-dimensional code from the hash value. Is generated (code generation step), and provides a security for generating a security with a forgery and alteration prevention function, characterized in that the two-dimensional code generated in the code generation step is printed together on the security when printing the security. .

In the above, the security system is further provided with an encryption function through the encryption key; Before the hash value generation step, the first data and the second data is encrypted through an encryption key to generate a cipher text (cipher text generation step), and in the hash value generation step, the hash value from the cipher text generated in the cipher text generation step The hash value is generated by the generation algorithm.

In the above, when a print command is input to the security system by the user, the hash value generating step is executed to generate the second data of the selected security printing apparatus as the hash value through the hash value generation algorithm together with the first data. It is characterized by.

In the above, when a print command is input to the security system by the user, the cipher text generation step is executed to encrypt the second data of the selected security printing apparatus together with the first data through an encryption key.

In the above, when a print command is inputted to the securities creating system by the user, the display unit of the securities creating system displays a securities information input window through which the securities information can be input; In the hash value generating step, the information input in the security information input window by the user forms the security information, and the hash value is generated through the hash value generation algorithm together with the second data.

In the above, when a user inputs a print command to the security system, the security information input window for inputting the security information is displayed on the display unit of the security system; In the cipher text generation step, the information input by the user in the security information input window forms the security information and is encrypted with an encryption key together with the second data.

In the above, the second data is characterized in that it comprises a serial number of the security printing apparatus.

In the above, the second data is obtained by scanning the pre-printed securities by the securities printing apparatus (image acquisition step), the step of converting the security image from the RGB image to the CMYK image (conversion step), the image A color selection step of setting a specific color element to 100% and a remaining color element to 0% in the step of generating an identification code from information of pixels constituting the identification code image (identification code generation step); The generated identification code is stored and provided together with the second data of the security printing apparatus in the storage unit forming the security system.

In the above description, the securities preparation program is activated on the display unit constituting the securities preparation system, and the contents of the securities are input to the securities preparation program activated by the user through the input unit constituting the securities preparation system. When the print command is input, the hash value generation step may include generating a security value as a hash value through a hash value generation algorithm together with the second data of the security printing apparatus.

In the above description, the securities preparation program is activated on the display unit constituting the securities preparation system, and the contents of the securities are input to the securities preparation program activated by the user through the input unit constituting the securities preparation system. When the print command is input, the cipher text generation step may be generated as a cipher text through the encryption key together with the second data of the security printing apparatus.

The present invention has a hash value generation algorithm and a code generation function, comprising: an input unit connected to a control unit, a display unit connected to the control unit, and a storage unit connected to the control unit; A securities printing apparatus connected to the securities making system and printing the securities; The first data, which is the security information input by the input unit, and the second data, which is the information of the security printing apparatus, are generated as a hash value by a hash value generation algorithm (hash value generation step), and a two-dimensional code is generated from the hash value. (A code generation step), and a security generation step of printing two-dimensional codes together on the security when printing the security; The securities are scanned to obtain an image (image acquisition step), and a comparison two-dimensional code is generated from a dot mark of the acquired image (comparison code generation step), and the shape of the two-dimensional code and the comparison two-dimensional code included in the image. This comparison provides a method for checking forgery and alteration of a security, characterized in that the forgery and corruption of the security is confirmed.

In the above, the comparison code generation step is a comparison first data is obtained from the scanned image (comparison first data acquisition step), the obtained image is converted from the RGB image to CMYK image and binarized (image conversion step), the conversion Comparative second data is obtained from the compared image (comparative second data obtaining step), and a comparison hash value is generated from the comparison first data and the comparison second data by a hash value generating algorithm (comparison hash value generating step), And a comparison two-dimensional code is generated from the comparison hash value (a comparison code generation step).

In the above, the comparing second data obtaining step includes extracting pixel coordinates of the pixels forming the dot from the information of the pixels forming the converted image (pixel extraction step), and calculating the distance of the pixels forming the dot by calculating the distance of the pixels forming the dot. An average pixel coordinate (dot pixel coordinate) is calculated (dot pixel coordinate calculation step), a distance between dot pixel coordinates is calculated (dot-to-dot calculation step), and a reference distance between dots is calculated (Dot reference distance calculation step) and a binary combination are obtained.

In the above description, a binary combination obtained from a dot is compared with a binary combination stored in a storage unit, so that comparison secondary data is obtained.

The present invention comprises a document generating device having a hash algorithm and a two-dimensional code generation function, and a document printing device connected to the document producing device to receive and print information from the document producing device, and the anti-counterfeiting means and the document through the document printing system. Information is printed as a printed document, and the anti-counterfeiting means is a two-dimensional code having a data area consisting of a first data area and a second data area; A network data generation step of generating a plurality of network information, which is a plurality of network information, and storing the data in a storage unit, a hash value generation step of generating and storing a hash value of the data and input document information by a hash algorithm, and encoding the document information A document information code data generation step of converting and storing the two-dimensional code data into a two-dimensional code data; and a hash value code data generation step of converting and storing the hash value data into two-dimensional code data; A code generated from document information code data is printed in the first data area, a code generated from hash value code data is printed in the second data area, and a two-dimensional code is printed together with document information, and a plurality of network dots The present invention provides a method for generating a document having forgery preventing means, which is printed on a document together with a two-dimensional code according to the generated dot data.

In the above, the halftone data generation step is characterized in that the halftone data is generated by a random function.

The method may further include generating dummy dot data in which dummy dot data is generated and stored in a storage unit, wherein the dummy dot data is generated by a random function; In the document information code data generating step, dummy dot data is also coded, converted into data for two-dimensional code, stored therein, and coded and printed together with the document information code in a first data area of the two-dimensional code.

The present invention is a document forgery confirmation device having a camera, a storage unit, and a display window, and having a two-dimensional code reader program and a hash algorithm, wherein the document generated by the method according to any one of claims 26 to 28 is used. In the method of identifying forgery; Document information from the code of the first data area of the data area constituting the anti-counterfeiting means, wherein the anti-counterfeiting means, which is a two-dimensional code printed on the document, is executed by the two-dimensional code reader program and imaged on the camera; Is obtained and a hash value is obtained from a code of a second data area, a hash information obtaining step of obtaining halftone information, and a comparison hash in which a hash value is generated and stored by a hash algorithm for document information and halftone information. And a hash value obtained from the code of the second data area and a comparison hash value stored in the storage unit, and comparing the hash value displayed on the display window. Provides a method to identify forgery and alteration.

In the above, the halftone information acquisition step includes an image conversion step of converting the captured and stored forgery prevention means image from an RGB image to a CMYK image, and a color selection step of setting a specific color element to 100% and remaining color elements to 0% in the image. And a halftone code generation step in which a halftone code is generated from the halftone pixel information constituting the anti-counterfeiting means.

According to the present invention, the document with a forgery and alteration prevention function and the method of generating the securities, the document with the forgery and alteration prevention function and the method for confirming the forgery of the securities, the method for generating the document with anti-counterfeiting means and the forgery confirmation method, Forgery of the printed document is prevented at the source, and there is an effect of simply checking whether or not the original and forgery.

1 shows an example of a document,

2 is an example of a cashier's check shown for explaining the cashier's check.

3 is an example of a QR code which is a two-dimensional code,

4 is a diagram schematically showing the QR code shown in FIG.

5 schematically shows a document printing system in which a method for generating a document with forgery and alteration prevention function according to the present invention is executed,

Figure 6 schematically shows a document with a forgery and alteration prevention function according to the present invention,

7 illustrates an example of dot marks of a document printing apparatus provided in a printed document,

8 is a flowchart illustrating a process of executing a method of generating a document with a forgery and alteration prevention function according to the present invention.

9 is a flowchart from document creation to printing shown in order to explain a method for generating a document with a forgery and alteration prevention function according to the present invention;

10 is a diagram schematically illustrating a document information input window displayed on a display unit constituting a document creating apparatus by executing a method of generating a document with a forgery and alteration prevention function according to the present invention.

11 is a diagram schematically illustrating a security printing system in which a method of generating a security having a forgery and alteration prevention function according to the present invention is executed;

12 is a flowchart illustrating a process of executing the method of generating a security with a forgery and alteration prevention function according to the present invention;

13 is a diagram schematically illustrating a security confirmation system in which a forgery and verification method of security according to the present invention is executed;

14 is a flowchart illustrating a process of executing a method for checking forgery and alteration of securities according to the present invention;

FIG. 15 is a flowchart for explaining a conversion step in FIG. 14;

FIG. 16 is a flowchart for explaining an operation step in FIG. 14.

17 shows an example of a dot mark of a security printing apparatus provided in the printed security,

18 schematically shows a document with anti-counterfeiting means according to the invention,

19 illustrates an example of a security having anti-counterfeiting means according to the present invention.

20 shows anti-counterfeiting means provided in the document according to the present invention,

FIG. 21 is an enlarged view of the margin area of FIG. 20,

FIG. 22 is a diagram for explaining a process of generating a two-dimensional code printed on a document provided with an anti-counterfeiting means according to the present invention.

Hereinafter, with reference to the drawings, a document with a forgery and alteration prevention function according to the present invention, a method for generating a security, a document with a forgery and alteration prevention function and a method for checking forgery and alteration of a security, a method for generating a document with a forgery prevention means, and The forgery confirmation method will be described in detail.

FIG. 5 schematically shows a document printing system in which a method for generating a document with forgery preventing function according to the present invention is executed, and FIG. 6 schematically shows a document with forgery preventing function according to the present invention. FIG. 7 illustrates an example of a dot mark of a document printing apparatus provided in a printed document, and FIG. 8 illustrates a process of generating a document with a forgery and alteration prevention function according to the present invention. 9 is a flow chart from document creation to printing to illustrate a method of generating a document with a forgery and alteration prevention function according to the present invention, and FIG. 10 is a flowchart of a document with a forgery and alteration prevention function according to the present invention. It is a diagram showing a document information input window displayed on a display unit constituting the document creating device is executed, 11 is a diagram schematically showing a security printing system in which a security forgery generation method with a forgery and alteration function according to the present invention is executed, and FIG. FIG. 13 is a flowchart illustrating a process, and FIG. 13 schematically illustrates a security confirmation system in which a forgery verification method of a security according to the present invention is executed, and FIG. 14 illustrates a method for verifying forgery and alteration of a security according to the present invention. FIG. 15 is a flowchart for explaining the conversion step in FIG. 14, FIG. 16 is a flowchart for explaining the calculation step in FIG. 14, and FIG. FIG. 18 shows an example of a dot mark of a security printing apparatus provided in the printed security, and FIG. 18 is according to the present invention. Figure schematically shows a document provided with anti-counterfeiting means, Figure 19 illustratively shows a securities with anti-counterfeiting means according to the present invention, Figure 20 is an anti-counterfeiting provided in the document according to the present invention Fig. 21 is an enlarged view of the margin area of Fig. 20, and Fig. 22 is a view for explaining a process of generating a two-dimensional code printed on a document with anti-counterfeiting means according to the present invention. .

As shown in FIG. 5, the document printing system 100 in which a method of generating a document with a forgery and alteration prevention function is executed includes a document creating apparatus 110 having document printing apparatus identification code information, a hash algorithm, and a code generating function. And a document printing apparatus 130 connected to the document creating apparatus 110 to print a document. An example of the document creating device 110 may include a PC including a display unit (eg, LCD), an input unit (eg, keyboard, and mouse), a storage unit, and a control unit (microcom). An example of the document printing apparatus 130 may include a printer (inkjet). Printer, laser printer). The document created by the document creating device 110 is stored and stored in the storage unit, and the storage unit which is stored in the stored state even if no power is supplied among the storage units, the storage means integrally provided in the document generating device, and external storage. It can be implemented by means. In the document displayed on the display unit, information is transmitted to the document printing apparatus 130 by the user's printing command and printed.

In the document printed by the document printing device 130 constituting the document printing system 100 to be executed, a document generating method with a forgery prevention function according to the present invention, document information and document output device identification code information are transmitted through an encryption key. Encrypting and generating a cipher text (ST-110, generating a cipher text), generating a hash value from the cipher text by a hash algorithm (ST-130, generating a hash value), and generating a code from the

hash value Codes

210 and 220 generated at (ST-150, code generation step) are printed on the document 200 together with the document contents as shown in FIG. The

codes

210 and 220 may be one-dimensional codes such as barcodes and two-dimensional codes such as QR codes. The cipher text generation step may be omitted, and a hash value may be generated by a hash algorithm from document information and document output device identification code information.

In FIG. 6, 201 issuing authority, 203 is receiving date, 205 issuing date, 207 is content described in the document, 202 is document number, and 209 is an area where the seal of the issuing organization is printed. It is.

Reference numerals

210 and 220 denote forgery and alteration prevention codes printed on the document together with the document contents.

When a document writing program (e.g., Hangul, MS-WORD, etc.) is activated on the display unit constituting the document creating device, and a print command (ST-230) is input by the user through the input unit constituting the document creating device, the document information The ciphertext is generated from the identification code of the document printing apparatus through the encryption key, and the hash value is generated from the generated ciphertext through the hash algorithm. The hash value is generated as a code, stored in the storage unit, and printed through the document printing apparatus. Are printed together on the document. Document information can be specified in advance, for example, in Figures 1 and 6, the issuing authority, the document number is the document information, and encrypted with the identification code of the document printing apparatus, it is possible to generate a code by hash conversion .

The document creating program is activated on the display unit forming the document creating device 110, the document is created by the user in the document creating program (ST-210), stored in the storage unit of the document creating device (ST-220), When a print command is input (ST-230), a print command signal is transmitted to the control unit of the document creating device 110. In the document creating device 110, a cipher text is generated from the document information and the identification code of the document printing apparatus stored in the storage unit through an encryption key (ST-110), and a hash value is generated from the generated cipher text through a hash algorithm (ST- 130, the hash value is generated as a code (ST-150), stored in the storage unit, and controlled to be printed together on the document to be printed through the document printing apparatus 130. The code is printed in the preset area of the document.

When a print command is input to the document creating device 110 by the user (ST-230), a separate document information input window 300 is displayed on the display unit as shown in FIG. 10 by a control command from the controller. It is also possible to. The document information input window 300 is provided with an input area so that the user can input letters, numbers, symbols, etc. to be encrypted by an encryption key or converted into hash values by a hash algorithm.

As illustrated in FIG. 10, the input area of the document information input window 300 may be divided into a plurality of areas so that specific contents may be input. The input area is an input area 310 for inputting an issuer name, an input area 330 for inputting a document number, and an input area 350 for inputting part or all of document contents as shown in FIG. 10. It is also possible to divide the display into a plurality of input regions. As shown in FIG. 10, the input area is divided and specific contents are input so that the forgery confirmation can be accurately and quickly performed without error. As shown in FIG. 10, the contents input in the separate document information input window 300 are stored separately from the document file and provided when the forgery is confirmed.

The content input in the input area of the document information input window 300 becomes document information and is encrypted by an encryption key together with document output device identification code information or converted into a hash value by a hash algorithm.

The printed document is printed with a unique mark of the manufacturer of the document printing apparatus 130 to indicate the serial number of the document printing apparatus 130 or the document printing date. Unique marks are printed so that the same pattern is repeated and not visible to the naked eye. For example, it is printed in light yellow. Therefore, a unique mark of one repeated pattern may be used as identification code information of the document printing apparatus 130.

Documents pre-printed from the document printing device 130 connected to the document generating device 110 are scanned to obtain an image (image acquisition step), and the document image for identification code analysis is converted from an RGB image to a CMYK image (image conversion). Step) In the CMYK combination representing the color of each pixel of the CMYK image, the remaining values except for the Y component value become 0 (specific component removal step), and are binarized (binarization step) to prepare an image for identification code. The document previously printed may be any document that is not damaged or contaminated as a document output from the document printing apparatus 130. Through the above steps, the image for analyzing the identification code arranged with the dots (DOT) as shown in FIG. 4 is prepared.

In the conversion from the RGB image to the CMYK image, the R, G, and B component values of each pixel constituting the scanned RGB image are calculated by C, M, and Y through calculation logic.

For example, it may be calculated through the following calculation logic to convert from an RGB image to a CMYK image.

float r, g, b;

k = Math. min (1-r, 1-g, 1-b);

if (k == 1) {c = m = y = 0; k = 1;}

else {

c = (1-r-k) / (1-k);

m = (1-g-k) / (1-k);

y = (1-b-k) / (1-k);}

In the above, r, g, and b represent the values of r, g, and b of each pixel of the RGB image, and c, m, and y represent the c, m, and y values of each pixel of the CMYK image.

In general, a pattern for identification of the document printing apparatus 130 of a document printed by the document printing apparatus 130 is printed by forming a plurality of dots (DOT) in an array, and the arrangement of the dots (DOT) is overlapped and printed. In addition, the plurality of dots DOT are printed in a pale yellow color scheme so as not to be visually identified. Accordingly, the value of the remaining components except for the Y component is “0” in each pixel constituting the converted CMYK image, and when binarized, an image having the same dot arrangement as in the portion indicated by B of FIG. 7 is obtained. For example, in binarization, the C, M, and Y component values of a pixel whose Y component is not 50% or more are 100%, and when it is 50% or less, the C, M, and Y component values are converted to 0%.

7 shows an example of two arrangements of overlapping arrangements. The manufacturer of the document printing apparatus 130 is confirmed by the regularity of the dot DOT.

FIG. 7 is a dot (DOT) array provided from a document printed by the document printing apparatus 130 of Company A, and has a 15 × 8 (column row) array, wherein eight dots in the first column represent the printing date, and 11 to 15 columns are represented. The serial number of the document printing apparatus 130 is shown. The manufacturer can be identified from the dot in the column indicating the serial number. The dot array information of the repeated section of the dot array repeatedly printed as described above becomes the identification code information of the document printing apparatus 130. When the clay arrangement as shown in FIG. 7 is obtained, the serial number and print date of the document printing apparatus 130 are obtained. Alternatively, in the information on the clay arrangement of the repeated section, for example, the first column of FIG. 7 is inputted as "101100010", the 11th column is inputted as "01011000", and the 12th column is inputted as "10001010", and the dot array of the first column and 11 to 15 columns is input. The identification code information of the document printing apparatus 130 may be stored in the storage unit. The identification code information of the document printing apparatus 130 includes a printing date and a serial number.

The document printing date may be obtained from the document creating device 110 when the print command is input and stored in the storage unit. The combination of any one or more of a manufacturer name of the document printing apparatus 130, a serial number of the document printing apparatus 130, and a document printing date obtained from the document generating apparatus 110 is stored as identification code information of the document printing apparatus 130. Can be stored in wealth. The manufacturer's name is converted into an ASCII code and binaryized and stored in the storage unit as identification code information of the document printing apparatus 130. Similarly, the serial number and the document print date are binarized and stored as identification code information in the storage. Document printing time may also be included.

The code may be generated separately from the forgery code and the modulation code, and included in the document when printed and printed.

A user generally activates a program for creating a document on the display unit, loads a basic document for creating a document, and writes a document by inputting the document content into the basic document. In the basic document, the issuing organization is described, and the "receiving", "date", "title", head of the issuing organization, and "document number" are input. Enter the creation date on the right side of "Date", enter the document title on the right side of "Title", enter the content to be described on the document in the document content description section, and enter the document number on the right of "Document number" You are done. Therefore, the contents described in the document may be divided into contents already described in the basic document (basic document contents) and contents input by the user in the basic document (additional description contents).

The basic document contents can be used for generating the forgery confirmation code, and the additional descriptions can be used for generating the modulation confirmation code, respectively. Code generation is generated in the same manner as described above, so a detailed description thereof will be omitted.

In order to confirm the forgery of the document printed with the code as described above, to obtain a document image by scanning the printed document, receiving the identification code information of the document printing apparatus 130 from the document creator or through the steps as described above Obtain a ciphertext by acquiring it through the encryption key provided from the document creator together with the document information described in the document, generate a hash value through a hash algorithm from the ciphertext, and generate a code from the hash value and print it on the document. Forgery can be checked by comparing the code to see if it is the same.

As shown in FIG. 11, the security printing system 400 in which the security generation method with the forgery prevention function according to the present invention is executed, has a security value having a security printing device identification code information, a hash algorithm, and a code generation function. It is composed of a securities producing device 410 and a securities printing device 420 connected to the securities producing device 410 to print securities. An example of the security creating device 410 may be a computer including a display unit (for example, LCD), an input unit (for example, a keyboard and a mouse), a storage unit, and a control unit (microcom). An example of the security printing apparatus 420 may be a printer. (Ink jet printers, laser printers). The securities stored in the securities producing device 410 are printed by transferring the information to the securities printing device 420 according to a user's printing command.

- 코드가 인쇄된 유가증권, 위변조 방지방법-Securities with code printed, how to prevent forgery

In the securities printing apparatus 420 of the securities printing system 400 in which the securities generating method having the forgery prevention function according to the present invention is executed, the securities have securities information and securities output device identification code information. Encrypting through an encryption key to generate a cipher text (ST-310, cipher text generation step), generating a hash value from the cipher text by a hash algorithm (ST-330, hash value generating step), and a code from the hash value The code generated in the step (ST-350, code generation step) is generated is printed on the security together with the content of the security. The code may be a one-dimensional code such as a barcode and a two-dimensional code such as a QR code. The cipher text generation step may be omitted, and the hash value may be generated by the hash algorithm from the securities information and the securities output device identification code information. The security information may be a displayed amount, a generating institution, and the like. Securities include types, issuers, amounts, and securities numbers.

When the program for creating a security is activated on the display unit constituting the security creating device, and a print command is input by the user through the input unit constituting the security creating device, the identification of the security information (first data) and the security printing device is identified. A cipher text is generated from a code (second data) through an encryption key, and a hash value is generated from a generated cipher text through a hash algorithm. The hash value is generated as a code, stored in a storage unit, and printed through a security printing apparatus. Are printed together on the security. Securities information can be specified in advance, the issuer, the amount to be printed and the securities number become the securities information, encrypted with an identification code such as the serial number of the securities printing apparatus, hash-converted and generated It is possible.

The program for creating a security is activated on the display unit constituting the security creating device 410, and the contents (for example, the amount) to be written in the security in the security creating program is input by the user, and the storage unit of the security creating device If the print command is stored in the print command, the print command signal is transmitted to the control unit of the securities preparation device. In the securities producing apparatus, a cipher text is generated from the securities information and the identification code of the securities printing apparatus stored in the storage through the encryption key 470 (ST-310), and the hash algorithm 480 from the generated cipher text 440. Hash value is generated through (ST-330), the hash value is generated as a code (ST-350) is stored in the storage unit information on the two-dimensional code 460, through the security printing apparatus 420 It is controlled to be printed together on the security being printed. The code is printed in the preset area of the security.

In FIG. 12, the first data is the issuing agency and the amount printed on the securities as the securities information, and the second data is the serial number of the securities printing apparatus 420 as the identification code of the securities printing apparatus 420. 3 The data is the print date obtained from the timer connected to the controller.

When a print command is inputted to the securities preparing device 410 by the user, the securities information input window may be displayed on the display unit by a control command from the controller. The security information input window is provided with an input area so that the user may input an amount to be encrypted by an encryption key or converted into a hash value by a hash algorithm.

The content entered in the input area of the security information input window becomes the security information and is encrypted by the encryption key together with the security printing device identification code information or converted into a hash value by a hash algorithm.

On the securities, a unique mark of the manufacturer of the securities printing apparatus 420 is printed to indicate the serial number of the securities printing apparatus 420 or the date of printing the securities. Unique marks are printed so that the same pattern is repeated and not visible to the naked eye. For example, it is printed in light yellow. Therefore, a unique mark of one repeated pattern may be used as identification code information of the security printing apparatus 420.

An image is acquired by scanning the printed securities printed from the securities printing device 420 connected to the securities creating device 410 (image acquisition step), and the securities image for identification code analysis is converted from an RGB image to a CMYK image. In the CMYK combination representing the color of each pixel of the CMYK image, the remaining values except for the Y component value become 0 (specific component removal step), and are binarized (binarization step) to prepare an image for the identification code. . The base securities may be any securities that are not damaged or contaminated as the securities output from the securities printing apparatus 420. Through the above steps, an image for analyzing an identification code arranged with dots (DOT) as shown in FIG. 17 is prepared.

float r, g, b;

k = Math. min (1-r, 1-g, 1-b);

if (k == 1) {c = m = y = 0; k = 1;}

else {

c = (1-r-k) / (1-k);

m = (1-g-k) / (1-k);

y = (1-b-k) / (1-k);}

The securities printed through the securities printing apparatus 420 are printed by arranging a plurality of dots DOT, which are patterns for identifying the securities printing apparatus 420, and the arrangement of the dots DOT is overlapped and printed. In addition, the plurality of dots DOT are printed in a pale yellow color system so that they are not easily identified by the naked eye. Therefore, in each pixel constituting the converted CMYK image, the value of the remaining components except for the "Y" component becomes "0", and when binarized, an image of the dot array as shown in part B of FIG. 17 is obtained. For example, in binarization, the C, M, and Y component values of a pixel whose Y component is not 50% or more are 100%, and when it is 50% or less, the C, M, and Y component values are converted to 0%.

17 shows an example of two arrangements of overlapping arrangements. The manufacturer and serial number of the security printing apparatus 420 may be confirmed by the regularity of the dot DOT. The date of printing can also be confirmed from the dot arrangement.

FIG. 17 is a dot (DOT) arrangement provided from the securities printed by the securities printing apparatus 420 of the company A, having a 15 × 8 (row row) arrangement, and the eight dots of the first column represent the printing dates, and 11 to 15 The column shows the serial number of the security printing apparatus 420. The manufacturer can be identified from the dot in the column indicating the serial number. The dot array information of the repeated section of the dot array repeatedly printed as described above becomes the identification code information of the security printing apparatus 420. When the clay arrangement as shown in FIG. 17 is obtained, the serial number and print date of the security printing apparatus 420 are obtained. Alternatively, in the information of the clay arrangement of the repeated section, for example, the first column of FIG. 17 is inputted as "101100010", the 11th column is inputted as "01011000", and the 12th column is inputted as "10001010", and the dot array of the first column and 11 to 15 columns is input. The identification code information of the security printing apparatus 120 may be stored in the storage unit. The identification code information of the security printing apparatus 420 includes a printing date and a serial number.

The security print date may be obtained from the security creation device 410 when the print command is input and stored in the storage unit. The combination of any one or more of the manufacturer name of the security printing apparatus 420, the serial number of the security printing apparatus 420, and the security printing date obtained from the security printing apparatus 410 may be used. The identification code information may be stored in the storage unit. The manufacturer's name is converted into an ASCII code and binaryized and stored in the storage unit as identification code information of the security printing apparatus 420. Similarly, serial numbers and securities print dates are binarized and stored as identification code information in the storage. Securities printing time may also be included.

Codes are generated separately from counterfeit codes and tamper codes, which are included in the security when printed and printed.

As described above, a code including information on the securities printing apparatus 420 is printed on the securities in addition to the contents of the securities (the type of securities, issuer, amount, and securities number, etc.). Counterfeiting is blocked at the source.

- 위변조 확인방법-How to check forgery and alteration

In order to check the forgery of the securities printed with the code as described above, the securities are scanned to obtain a securities image, and the identification code information of the securities printing apparatus 420 is provided from the securities creator or the scanned image. Obtained from the cryptocurrency key and the cryptographic key provided from the securities creator together with the security information described in the securities to prepare a ciphertext, generate a hash value through a hash algorithm from the ciphertext, and generate a code from the hash value Forgery can be checked by comparing the codes printed on the securities to see if they are identical.

FIG. 13 illustrates a security forgery forgery verification system in which a forgery and forgery verification method is executed. As illustrated in FIG. 13, the security forgery and forgery verification system 500 includes a hash value generation algorithm and a code generation function. A security check apparatus 510 comprising an input unit connected to the display unit, a display unit connected to the control unit, and a storage unit connected to the control unit; The scanner 520 is connected to the security checking device 510 and scans the security by the input of the input unit 513 to prepare an image. An example of the security confirmation device 510 may be a computer including a display unit 515 (eg, LCD), an input unit 513 (eg, keyboard and mouse), a storage unit 517, and a control unit 511 (microcomputer). The scanner 520 is connected to the control unit 511 through a connection unit 519.

The OCR algorithm is recognized from the securities image acquired through the scanner 520 (ST-410), and the text is recognized from the image, and information about the amount, the generating institution, and the like is obtained and stored in the storage unit 517 (ST-430). Since the text is recognized from the image is a well-known technology, description thereof will be omitted.

The security image is converted from an RGB image to a CMYK image (ST-415, image conversion step), and the CMYK combination representing the color of each pixel in the CMYK image is zero except for the Y component value (specific component removal). Binarization (ST-415b) provides an image for dot analysis. The process of converting from an RGB image to a CMYK image and the binarization process are described above and thus will be omitted. A dot image as shown in FIG. 17 may be stored through the above process, and the second image, which is information on the security printing apparatus 420, may be stored by calculating a dot array of any one of the repeated dot arrays. Data may be obtained (ST-425).

Pixels constituting the dots are extracted from the repeatedly arranged dots (ST-4201). Pixel information about one dot array may be extracted by the user designating a section on the image for the repeated array of dots.

Pixel coordinate information of pixels having C, M, and Y component values of 100% of pixels forming dots in a specified section is stored in the storage unit. The pixels are classified and stored as pixels forming the same dot from the stored pixel information. Since the distance between the dots is greater than twice the size of the dots, pixels that form the same dot by specifying the distance may be classified and stored. When a value larger than the size of the dot and smaller than the shortest distance between the dots is input as the reference distance L, the distance to one pixel is calculated for one pixel and the calculated distance is smaller than the reference distance L (ST). The same dot is repeated, the same process is repeated, and the pixel forming the same dot is calculated, the pixel coordinate values of the pixels forming the same dot are summed (ST-4204), and the average value is calculated (ST). -4205) to the pixel coordinates of the dot. By performing the above process on the remaining pixels, the pixels constituting the dots are calculated, and the pixel coordinates of the dots are calculated (ST-4206).

The pixel coordinates of each dot are calculated, and the distance of each dot is calculated. In the calculation of the distance, the distance in the X direction of the dots constituting the dot array is calculated, and the distance in the Y direction is calculated. When the distance between the dots is calculated, the minimum value of the calculated distance becomes the distance in the X and Y directions between the dots (ST-4207). In FIG. 17, the horizontal direction is described as the X direction and the vertical direction as the Y direction. The maximum value is the size of the dot array in the X and Y directions. The maximum value is divided by the minimum value so that the number of dots arranged in the X and Y directions is stored in the storage. The coordinate values in the X and Y directions in which the dots should exist are calculated from the dot arrays (number) in the X and Y directions, and are stored in the storage unit.

The coordinates of the dots computed above and the coordinate values where the dots should be contrasted in the X and Y directions, so that if there is a dot having the coordinate value that should be present, "1". If not, it is set to "0", and a combination of numbers such as a binary array is calculated and stored in the X and Y directions.

The storage unit 517 stores binary combinations and information of the arrangement of dots for the securities printing apparatus, which are distributed in the market or used for printing the securities in advance, and are compared with the stored combinations through the above-described process. It is possible to obtain the information of the device to extract the serial number and the like of the printing device.

The information (comparative second data; serial number, printer manufacturer, etc.) of the printing device obtained through the above process is included in the securities, and the securities information (comparative first data) stored in the storage unit through a character recognition process; A hash value is generated by a hash algorithm together with the security type, issuer, and amount of money, and a two-dimensional code (comparative two-dimensional code) is generated from the hash value. In addition, a hash date may be generated by further including a printing date as the comparison third data. The print date may be obtained from dot information.

Therefore, forgery of the security may be confirmed by comparing the comparison 2D code and the 2D code printed on the security.

The comparison first data and the comparison second data may be generated as an encryption text by an encryption key, and a hash value may be generated from the encryption text by a hash algorithm.

The document 600 provided with the anti-counterfeiting means according to the present invention is a document generating device having a hash algorithm and a two-dimensional code (eg QR code) generating function, and a document which is connected to the document producing device and prints a document. It consists of a printing device. The hash algorithm and the 2D code generation program may be stored in the storage unit of the document creating apparatus, but may be provided online. Documents stored in the document creating device or transmitted through the Internet are transferred to the document printing device and printed by the user's print command.

An example of the document creating apparatus may be a computer such as a PC including a display unit (for example, LCD), an input unit (for example, keyboard and mouse), a storage unit, and a control unit (microcom). An example of the document printing apparatus 120 may include a printer (inkjet). Printer, laser printer, etc.) can be mentioned.

Hereinafter, the document shown in FIG. 18, the securities shown in FIG. 19, and a description including "document" as a meaning including all printed by a printing means such as a printer such as a receipt, a test report, a contract, a certificate, etc. do.

As illustrated in FIGS. 18 and 19, the document 600 provided with the anti-counterfeiting means according to the present invention includes document information that is the content of the document and the anti-counterfeiting means 610. The anti-counterfeiting means 610 is provided to be printed on the margin of the document is not printed document information.

According to the type, the issuer 601, the destination 603, the issue date 605, the title, the content 607, the amount, and the like of the issuer are stamped (609). , Document number 602 and the like are described.

20 illustrates an example of an anti-counterfeiting means 610 that is printed and provided on the document 600 shown in FIGS. 18 and 19. The anti-counterfeiting means 610 provided in the document 600 of the present invention As shown in FIG. 20, a two-dimensional code (eg, a QR code), a plurality of halftone dots 640, and an edge 617 surrounding the two-dimensional code are formed. The two-dimensional code has a quadrangular outline and consists of a positioning symbol 611, a reference cell 613, and a data area 615. The edge 617 is printed in a form that is spaced apart from the two-dimensional code to surround the two-dimensional code, a margin area 619 is formed between the two-dimensional code and the edge 617, the plurality of halftone dots 640 It is printed in the margin area 619 between the two-dimensional code and the edge 617. The plurality of halftone dots 640 are provided in a horizontal and vertical arrangement. The dot 640 is printed in a pale yellow color such as a mark unique to the securities so as not to be visually identified. When the anti-counterfeiting means 610 is photographed or scanned to become an image, the size of the dot 640 is divided into two-dimensional codes when the anti-counterfeiting means 610 is binarized and labeled so that only the dot 640 is separated after labeling. The size becomes smaller than the number of pixels forming the other part.

The edge 617 also forms a square. Positioning symbol 611 and the reference cell 613 forming a two-dimensional code is a configuration forming a conventional QR code, a detailed description thereof will be omitted. In the data area 615, information such as document information is generally coded into a print area.

The data area 615 constituting the anti-counterfeiting means 610 printed on the document 600 provided with the anti-counterfeiting means according to the present invention includes a first data area 615-1 and a second data area 615-. 2) consists of. The first data area 615-1 and the second data area 615-2 may be divided up and down, and the upper portion becomes the first data region 615-1 and the lower portion includes the second data region ( 615-2).

Document information is coded and printed in the first data area 615-1. The document information includes information inputted by the document creator, and information that the document has as basic information (for example, the name of the remittance authority of FIG. 18, cashier's check, etc. of FIG. 19). Document information and encoded data of a plurality of dots 640 to be printed in the blank area 619 are generated as a hash value by a hash algorithm, and the generated hash value is encoded to be printed in the second data area 615-2. do.

Encoded data and document information of a plurality of halftones 640 are encrypted by an encryption key stored in a storage unit of a document creating device or provided online to further protect against counterfeiting or tampering, and a hash value is stored by a hash algorithm. It may be generated and coded and printed in the second data area 615-2 of the two-dimensional code.

A method of generating a document with anti-counterfeiting means will be described.

The document 600 having the anti-counterfeiting means 610 illustrated in FIGS. 18 to 20 has a hash algorithm and a two-dimensional code generation function 110 shown in FIG. 5 (eg, a PC). And a document printing system 100 connected to the document creating device 110 and configured to receive and print information from the document creating device 110 to print. The hash algorithm and the two-dimensional code generation program, which is a two-dimensional code generation function, may be stored and executed in a storage unit (not shown) constituting the document creating device 110, or may be provided and executed online.

The document created by the document creating device 110 constituting the document printing system 100 is a forgery prevention means 610 having a first data area 615-1 and a second data area 615-2, which will be described later. Printed with document information. The anti-counterfeiting means 610 is printed on the blank portion where document information is not described.

The document information inputted by the document creator during document creation is executed by a two-dimensional code generation program by a print command, coded, and printed on the first data area 615-1 of the two-dimensional code. In the first data area 615-1 of the 2D code, dummy dot data, which will be described later, may be coded and printed together with the document information code.

The halftone data for the plurality of halftones 640 to be printed in the margin area 619 between the two-dimensional code and the edge 617 is generated when the document creator enters a storage command or a printing command and is stored in the storage unit.

FIG. 21 shows an example of the halftone 640 and halftone data printed on the blank areas 619 and 619-1 shown in FIG. The document writing device 110 has a random function, and the halftone data is generated by a random function. A portion indicated by "A" in FIG. 21 shows an example of halftone data generated by execution of a random function. As shown in FIG. 21, halftone data in each column in the blank areas 619 and 619-1 is shown in FIG. The dot data of each column as " 1111111010 ", " 1101011101 " and " 1000101000 " is generated by a combination of ten binary digits and stored in a storage unit. In accordance with this halftone data, halftone dots 640 are printed in the blank area 619 as shown in FIGS. 20 and 21. The halftone point 640 is printed in a preset size at a predetermined position of the margin area. The halftone 640 is not printed at the position of the halftone data "0", and the halftone 640 is printed at the position of "1". The dot 640 may be printed in the same size, or may be printed to have a different size by executing a random function.

On the other hand, the random function is executed twice, and the halftone data and the dummy halftone data may be generated, respectively. The dot data and the dummy dot data are generated as a binary combination having the same size and stored in the storage unit. For example, when halftone data is generated by ten binary combinations such as "1100100010", dummy halftone data is also generated by ten binary combinations such as "0010011000". When the hash value is generated from the document information and the dot data by the hash algorithm, the dot data such as "1100100010" is generated as the hash value together with the document information, but the array dot data of the dot 640 printed in the blank area 619 is printed. Becomes "1110111010" so that the arrangement of the halftone 640 and the halftone data of the blank area do not coincide with each other, thereby preventing forgery by simple copying. The dot data and the dummy dot data are " XOR ", and the value is " 0 " when the values are the same, and " 1 " The XOR operation is also executed during the decryption process to verify the halftone data.

As shown in FIG. 22, a hash value is generated by executing a hash algorithm together with document information, and the generated hash value is encoded and printed in the second data area 615-3 of the two-dimensional code. When the print command of the document creator is input, the hash algorithm is executed to generate a hash value from the dot data and the document information and stored in the storage unit. The two-dimensional code generation program is executed to encode the hash value stored in the storage unit to generate the second data. It is printed in the area 615-3.

It describes a method for checking forgery and alteration for documents provided with anti-counterfeiting means.

As described above, the document 600 on which the anti-counterfeiting means 610 is printed may be easily checked whether the document 600 has been tampered with. The forgery is performed by a document forgery confirmation device equipped with a camera, a storage unit, and a display window, and having a two-dimensional code reader program and a hash algorithm. A smartphone is an example of a document forgery confirmation apparatus.

The method for checking forgery and alteration of the document 600 on which the anti-counterfeiting means 610 is printed is a forgery prevention means in which the anti-counterfeiting means 610 including the 2D code printed on the document is executed and the image is forged into the camera. Document information is obtained from the code of the first data area 615-1 of the data area constituting the imaging step and the image-preventing means 610, and a hash value is obtained from the code of the second data area 615-2. The data acquisition step, the halftone information acquisition step of obtaining halftone data from the halftone dot 640 printed in the margin area 619 around the two-dimensional code, and the document information and halftone data are generated as hash values by a hash algorithm. Comprising a comparison hash value generation step and the hash value obtained from the code of the second data area (615-2) and the comparison hash value stored in the storage unit is compared with the hash value displayed on the display window Lose.

Hash values (referred to as " comparative hash values ") are generated by the hash algorithm for dot data and document information obtained from dots printed around the two-dimensional code, and the comparison hash value and the second data area 615- are obtained. The hash value obtained from the code of 2) is displayed on the display window. If the hash value and the comparison hash value are the same, the document does not have a forgery. If the hash value and the comparison hash value are different, the document is judged to be forged.

The process of obtaining document information and dummy dot data from the code of the first data area 615-1 and the process of obtaining a hash value from the code of the second data area 615-1 are known as a process of decoding a QR code. Description of the description is omitted.

The halftone information acquisition step will be described.

The dot information obtaining step includes an image conversion step of converting an RGB image into a CMYK image, a color selection step of setting a specific color (yellow) element to 100% and a remaining color element to 0% in the image, a binarization step, and labeling And a halftone pixel coordinate extraction step, a shortest distance extraction step between the halftone points, a halftone position coordinate extraction step, and a halftone data acquisition step.

In the image conversion step, the image of the anti-counterfeiting means 610 is converted from an RGB image to a CMYK image. In the conversion from the RGB image to the CMYK image, the R, G, and B component values of each pixel constituting the RGB image captured or scanned are calculated as C, M, and Y through calculation logic. For example, it may be calculated through the following calculation logic to convert from an RGB image to a CMYK image.

float r, g, b;

k = Math. min (1-r, 1-g, 1-b);

if (k == 1) {c = m = y = 0; k = 1;}

else {

c = (1-r-k) / (1-k);

m = (1-g-k) / (1-k);

y = (1-b-k) / (1-k);}

Dotted dots are printed in a pale yellow color, such as securities unique codes, to prevent them from being identified with the naked eye. In the color element selection step, the value of the remaining components except for the Y component is “0” in each pixel of the converted CMYK image, and when binarized, an image of a dot array as shown in FIG. 21 is obtained.

In the labeling step, pixels adjacent to each other in the binarized image are displayed and stored with the same number, and the number of pixels labeled with the same number is counted. If the number of pixels labeled with the same number is greater than or equal to the set value, the color component of the pixel becomes “0” and the halftone 640 is separated. When the halftone 640 is separated, the average value of the coordinates of the pixels constituting each halftone 640 is calculated to calculate the position of each halftone 640.

When the position of each halftone point 640 is calculated, the distance between halftone points 640 is calculated, and the shortest distance among the calculated distances is a distance between halftone points. If the distance between the two dots is greater than the shortest distance, an operation is performed in which the distance between the two dots is divided by the shortest distance, and the halftone data between the two dots and the two dots is obtained from the calculated result. For reference, when the distance between the two dots is divided by the shortest distance, if the value is 2, the dot data between the two dots and the two dots is "1001". In this way, halftone data is obtained.

Until now, the document with a forgery and alteration prevention function and the method of generating securities according to the present invention, the document with the forgery and alteration prevention function and the forgery confirmation method of the securities, the method of generating a document with a forgery prevention means and the method of forgery and alteration Although described with reference to the embodiment shown in the drawings it is merely exemplary, those skilled in the art will understand that various modifications and equivalent other embodiments are possible from this. Therefore, the true technical protection scope should be defined by the technical spirit of the appended claims.

Claims

A document printing apparatus comprising a document printing apparatus having document printing apparatus identification code information, a hash algorithm, and a code generating function, and a document printing apparatus connected to the document producing apparatus to print a document; A hash value is generated from the document information and the document printing device identification code information by the hash algorithm (hash value generation step), and a code is generated from the hash value (code generation step), and the code is generated when the document is printed. And a code generated in the step is printed on the document.
The apparatus of claim 1, wherein the document creating device further comprises an encryption function through an encryption key; The document information and the document printing device identification code information before the hash value generation step is further encrypted by an encryption key to generate a cipher text (cipher text generation step), in the hash value generation step from the cipher text generated in the cipher text generation step A method for generating a document having a forgery prevention function, characterized in that a hash value is generated by a hash algorithm.
The method according to claim 1, wherein, when a document print command is input to the document creating apparatus by the user, the hash value generating step is executed to generate the hash value of the selected document printing apparatus through the hash algorithm together with the document information. A method for generating a document having a forgery prevention function characterized in that.
The forgery of claim 2, wherein, when a document printing command is input to the document creating apparatus by the user, the cipher text generation step is executed so that the identification code of the selected document printing apparatus is encrypted together with the document information through an encryption key. How to create a document with a prevention function.
The apparatus of claim 1, wherein, when a document print command is input to a document creating apparatus by a user, a document information input window for displaying document information is displayed on a display unit of the document creating apparatus; In the hash value generation step, the information input in the document information input window by the user forms the document information, and the hash value is generated through the hash algorithm together with the document printing device identification code. How to produce.
The apparatus according to claim 2, wherein, when a document print command is input to a document creating apparatus by a user, a document information input window for inputting document information is displayed on a display unit of the document creating apparatus; In the cipher text generation step, the information inputted by the user into the document information input window forms the document information and is encrypted through an encryption key together with the document printing device identification code to generate a cipher text. How to produce.
The document printing apparatus identification code information is obtained from the manufacturer name of the document printing apparatus 130, the serial number of the document printing apparatus 130, and the document generating apparatus 110. Method for generating a document with a forgery prevention function, characterized in that made by a combination of any one or more of the document printing date.
The method of claim 1, wherein the document printing apparatus identification code information is obtained by scanning a document previously printed by a document printing apparatus to obtain a document image (document image obtaining step), and converting the document image from an RGB image to a CMYK image. (Document image conversion step), a color selection step of 100% of a specific color element and 0% of the remaining color elements of an image, and an identification code generation step from an information of pixels constituting an identification code image (identification code generation step) ; And a generated identification code is stored and provided together with an ID of a document printing apparatus in a storage unit forming a document creating apparatus.
The document creation program according to claim 1, wherein a document creation program is activated on a display unit constituting the document creation device, and the document content is input to the document creation program activated by the user through an input unit constituting the document creation device, and a print command is issued by the user. In the hash value generation step, the document input content is generated as a hash value through a hash algorithm together with the identification code of the document printing apparatus.
The document creation program according to claim 2, wherein a document creation program is activated on a display unit constituting the document creation device, and the document content is input to the document creation program activated by the user through an input unit constituting the document creation device, and a print command is issued by the user. If the cipher text generation step, the document input content is generated as a cipher text through the encryption key with the identification code of the document printing apparatus, characterized in that the forgery prevention function generating method.
A document printing apparatus having a document printing apparatus identification code information, a hash algorithm, a code generating function, and a document printing apparatus connected to the document creating apparatus; In the document creating apparatus, document information and document printing apparatus identification code information are generated through a hash value generation step (hash value generation step) by a hash algorithm and a code generation step (code generation step) from the hash value. And a step of storing the code in a storage unit (code storage step), wherein the code is printed together with the document input contents.
A securities generation system having a hash value generation algorithm and a code generation function, the input unit connected to a control unit, a display unit connected to the control unit, and a storage unit connected to the control unit; A securities printing apparatus connected to the securities making system and printing the securities; Generating a hash value by the hash value generation algorithm (first hash) of the first data, which is the security information input by the input unit, and the second data, which is the information of the security printing apparatus, and a two-dimensional code from the hash value. And a step (code generation step) of generating a securities generating method, wherein the two-dimensional code generated in the code generation step is printed together on the securities.
13. The system of claim 12, wherein the security system further comprises an encryption function through an encryption key; Before the hash value generation step, the first data and the second data is encrypted through an encryption key to generate a cipher text (cipher text generation step), and in the hash value generation step, the hash value from the cipher text generated in the cipher text generation step A method of generating a security having a forgery prevention function, characterized in that a hash value is generated by a generation algorithm.
The method according to claim 12, wherein, when a print command is input to the security creating system by the user, the hash value generating step is executed so that the second data of the selected security printing apparatus is hashed together with the first data through the hash value generating algorithm. Securities generation method with a forgery prevention function, characterized in that the generated value.
15. The method of claim 13, wherein if a print command is input to the security system by the user, the cipher text generation step is executed to encrypt the second data of the selected security printing apparatus together with the first data through an encryption key. Securities generation method provided with a forgery and alteration prevention function.
13. The method of claim 12, wherein, when a print command is input to the securities creating system by the user, a display of the securities creating system displays a securities information input window through which the securities information can be input; In the hash value generation step, the information input in the security information input window by the user forms the security information, and the hash value is generated through the hash value generation algorithm together with the second data. How to create a security.
The security information input window according to claim 13, further comprising: when a print command is input to the security system by the user, a security information input window for inputting the security information is displayed on the display unit of the security system; In the cipher text generation step, the securities provided with the forgery prevention function, characterized in that the information inputted in the securities information input window by the user forms the securities information and is encrypted through the encryption key together with the second data to generate the cipher text. How to produce.
18. The method of claim 12, wherein the second data includes a serial number of the security printing apparatus.
The method of claim 12, wherein the second data is obtained by scanning a pre-printed security by a security printing apparatus (image acquisition step), and converting the security image from an RGB image to a CMYK image (conversion). A color selection step of setting a specific color element to 100% and a remaining color element to 0% in the image, generating an identification code from information of pixels constituting the identification code image (identification code generation step); And a forgery prevention function, characterized in that the generated identification code is stored and provided together with the second data of the security printing apparatus in a storage unit forming the security system.
The method of claim 12, wherein the securities preparation program is activated on the display unit constituting the securities preparation system, and the contents of the securities are input to the securities preparation program activated by the user through the input unit constituting the securities preparation system. When a print command is input by a user, in the hash value generation step, the security input content is generated as a hash value through a hash value generation algorithm together with the second data of the security printing apparatus. Securities generation method.
The method of claim 13, wherein the securities preparation program is activated on a display unit constituting the securities preparation system, and the contents of the securities are input to the securities preparation program activated by the user through an input unit constituting the securities preparation system. When a print command is input by the user, in the cipher text generation step, the securities input content is generated as a cipher text through the encryption key together with the second data of the securities printing apparatus. Way.
A securities generation system having a hash value generation algorithm and a code generation function, the input unit connected to a control unit, a display unit connected to the control unit, and a storage unit connected to the control unit; A securities printing apparatus connected to the securities making system and printing the securities; The first data, which is the security information input by the input unit, and the second data, which is the information of the security printing apparatus, are generated as a hash value by a hash value generation algorithm (hash value generation step), and a two-dimensional code is generated from the hash value. (A code generation step), and a security generation step of printing two-dimensional codes together on the security when printing the security; The securities are scanned to obtain an image (image acquisition step), and a comparison two-dimensional code is generated from a dot mark of the acquired image (comparison code generation step), and the shape of the two-dimensional code and the comparison two-dimensional code included in the image. The forgery confirmation method of the security, characterized in that forgery and forgery of the securities is confirmed by comparing.
23. The method of claim 22, wherein generating the comparison code comprises comparing first data in the scanned image (comparison first data obtaining step), and converting the obtained image from an RGB image to a CMYK image and binarizing (image conversion). Step 2), the comparison second data is obtained from the converted image (comparison second data acquisition step), and the comparison hash value is generated by the hash value generating algorithm from the comparison first data and the comparison second data (comparison hash value). Generation step), a comparison two-dimensional code is generated from the comparison hash value (comparison code generation step); consisting of forgery and forgery verification method comprising the.
24. The method of claim 23, wherein the obtaining of the second comparison data comprises extracting pixel coordinates of the pixels forming the dot from the information of the pixels forming the transformed image (pixel extraction step), and calculating a dot by calculating a distance of the pixels forming the dot. The average pixel coordinates (dot pixel coordinates) of the pixels forming the dot (dot pixel coordinates calculation step), the distance between the dot pixel coordinates (the distance calculation step between dots), and the reference distance between the dots And a step of calculating (dot-based distance calculation) and a step of obtaining a binary combination.
25. The method of claim 24, wherein a binary combination obtained from a dot is compared with a binary combination stored in a storage unit to obtain comparative secondary data.
It consists of a document writing device having a hash algorithm and a two-dimensional code generation function, and a document printing device connected to the document writing device to receive and print information from the document writing device. Printed in a printed document, wherein the forgery preventing means is a two-dimensional code having a data area consisting of a first data area and a second data area; A network data generation step of generating a plurality of network information, which is a plurality of network information, and storing the data in a storage unit, a hash value generation step of generating and storing a hash value of the data and input document information by a hash algorithm, and encoding the document information A document information code data generation step of converting and storing the two-dimensional code data into a two-dimensional code data; and a hash value code data generation step of converting and storing the hash value data into two-dimensional code data; A code generated from document information code data is printed in the first data area, a code generated from hash value code data is printed in the second data area, and a two-dimensional code is printed together with document information, and a plurality of network dots A method for generating a document having forgery preventing means, characterized in that printed on the document along with the two-dimensional code according to the generated dot data.
27. The method of claim 26, wherein in the step of generating halftone data, halftone data is generated by a random function.
27. The method of claim 26, further comprising generating a dummy dot data in which dummy dot data is generated and stored in a storage unit, wherein the dummy dot data is generated by a random function. Generated; In the document information code data generating step, dummy halftone data is also coded, converted into data for two-dimensional code, stored therein, and coded and printed together with the document information code in the first data area of the two-dimensional code. Method of generating the provided document.
A forgery confirmation device having a camera, a storage unit, and a display window, and having a two-dimensional code reader program and a hash algorithm, wherein the forgery of the document generated by the method according to any one of claims 26 to 28 is confirmed. In a method; Document information from the code of the first data area of the data area constituting the anti-counterfeiting means, wherein the anti-counterfeiting means, which is a two-dimensional code printed on the document, is executed by the two-dimensional code reader program and imaged on the camera; Is obtained and a hash value is obtained from a code of a second data area, a hash information obtaining step of obtaining halftone information, and a comparison hash in which a hash value is generated and stored by a hash algorithm for document information and halftone information. And a hash value obtained from the code of the second data area and a comparison hash value stored in the storage unit, and comparing the hash value displayed on the display window. How to check forgery.
30. The method of claim 29, wherein the obtaining halftone information comprises: an image conversion step of converting the captured and stored anti-counterfeiting means image from an RGB image to a CMYK image, and setting a specific color element to 100% and remaining color elements to 0% in the image. And a color code selection step, and a halftone code generation step of generating a halftone code from pixel information of halftone dots constituting the counterfeit prevention means.