JP4188850B2 - Document creation device for falsification verification, document falsification verification device, falsification verification document creation method, document falsification verification method, falsification verification document creation program, document falsification verification program, storage medium storing falsification verification document creation program and document falsification Recording medium storing verification program - Google Patents

Description

  The present invention relates to a technique for verifying falsification of a document such as a printed matter, and in particular, when a piece of paper such as a character is pasted on a character portion of a printed matter and copied, or another character is easily pasted on a character portion of an electronic document. The present invention relates to a document creation technique capable of verifying falsification and a technique for verifying the document falsification.

  The “printed material verification information creation device and printed material verification device” described in Patent Document 1 discloses a technique for making a printed material compatible with falsification verification. In this technology, information dependent on a printed material is printed in the form of a barcode or the like as verification information, and at the time of verification, the printed material and the dependency information read from the printed material are collated to verify tampering.

  In addition, the “apparatus, system, method, program, printed material and recording medium relating to addition of printed material verification information and printed material verification” described in Patent Document 2 is used to prevent alteration of the content of the printed material and to confirm uniqueness at the same time. Technology is shown. This technology verifies tampering by using ID paper that outputs ID information in response to radio waves.

Further, “Form Non-Falsification Verification Method, Form Printing Device, and Form Falsification Existence Verification Device” described in Patent Document 3 discloses a form falsification verification method and a falsification verification technique. In this technology, a form image is coded in a reproducible format, and further recorded on a form in a predetermined recording format. At the time of verification, the form image is compared with the form image reproduced from the code. Verification is in progress.
JP-A-8-297743 JP 2002-99209 A JP 2002-298120 A

  However, the technique of Patent Literature 1 is intended for a printed matter already, and does not support making document data (digital data) a printed matter that supports tampering verification.

  In the technique of Patent Document 2, since ID paper that outputs ID information in response to radio waves is used, a printed material corresponding to tampering verification cannot be easily created at low cost.

  In the technique of Patent Document 3, since this method is verified visually, it cannot be said that the productivity is high, and is not suitable for a case where a large amount of printed matter is verified in a short time.

  An object of the present invention is to provide a document in which a tampering verification is performed with high accuracy even when a piece of paper such as a character is pasted on a character portion of a document and copied or another character is pasted on a character portion of an electronic document. An object of the present invention is to provide a falsification verification document creation device, a falsification verification document creation method, a falsification verification document creation program, and a recording medium.

  Another object of the present invention is to perform verification of the alteration with high accuracy even when a piece of paper such as a character is pasted on a character portion of a document and copied or another character is pasted on a character portion of an electronic document. An object is to provide a document falsification verification apparatus, a falsification verification method, a falsification verification program, and a recording medium.

The present invention is a falsification verification document creation device for adding, as falsification verification information, dots generated at predetermined intervals to a plain part of a falsification verification target image, and has a wider area than the falsification verification target image. A first rectangular area defined to cover and a first overlapping area that overlaps only with the first rectangular area are provided, and a second rectangle that is disposed adjacent to only the first rectangular area A region defining means for defining a region and a third rectangular region provided with a second overlapping region that overlaps only with the second rectangular region and disposed adjacent to only the first rectangular region; Setting means for randomly setting the odd number of dots of the verification information included in the first rectangular area, the second rectangular area, and the third rectangular area, and the first overlapping area and the second overlapping area Solid part of the area The total of the first dot adding means for randomly adding dots and the number of dots added to the first overlapping area in the first rectangular area excluding the first overlapping area is , Second dot adding means for adding dots so as to match the odds set by the setting means, and a second rectangular area, wherein the first overlapping area and the second overlapping area are Third dot adding means for adding dots so that the sum of the number of dots added to the first overlapping area and the second overlapping area matches the oddity set by the setting means in the excluded portion And the sum of the number of dots added to the second overlapping area in the third rectangular area excluding the second overlapping area matches the oddity set by the setting means. With a dot To those having the fourth dot adding means.

A document falsification verification apparatus that verifies falsification of a document created by the falsification verification document creation apparatus according to claim 1, wherein the first rectangular area, the second rectangular area, and a third A determination unit that counts the number of dots to be arranged for each of the rectangular regions and determines whether or not the count value matches the oddity set by the first setting unit, and the determination by the determination unit Based on the result, a falsification verification means for verifying the falsification of the document is provided.

Further, a falsification verification document creation method for adding dots generated at predetermined intervals to a plain part of a falsification verification target image as falsification verification information so as to cover a larger area than the falsification verification target image. A first rectangular area defined in the first rectangular area, a first overlapping area that overlaps only with the first rectangular area, and a second rectangular area disposed adjacent to only the first rectangular area; A region defining step for defining a second rectangular region that overlaps only with the second rectangular region, and defining a third rectangular region that is disposed adjacent to only the first rectangular region; A setting step of randomly setting the odd number of dots of the verification information included in the one rectangular region, the second rectangular region, and the third rectangular region; and the first overlapping region and the second overlapping region Plain A first dot adding step for randomly adding dots, and the number of dots added to the first overlapping area in a portion of the first rectangular area excluding the first overlapping area. A second dot adding step for adding dots so that the total matches the oddity set in the setting step, and a second rectangular area, the first overlapping area and the second overlapping area Third dots to which dots are added so that the sum of the number of dots added to the first overlapping area and the second overlapping area matches the oddity set in the setting step in a portion excluding the area The sum of the adding step and the number of dots added to the second overlapping area in the third rectangular area excluding the second overlapping area is the odd number set by the setting step. As match, in which a fourth dot adding step of adding a dot.

A document falsification verification method for verifying falsification of a document created by the falsification verification document creation method according to claim 3, wherein the first rectangular area, the second rectangular area, and a third A determination step for counting the number of dots to be arranged for each of the rectangular regions, and determining whether the count value matches the oddity set in the first setting step, and determination in the determination step A tampering verification step for verifying tampering of the document based on the result is provided.

A falsification verification document creation program characterized in that a computer causes each step of the falsification verification document creation method according to claim 3 to function.
A falsification verification program that causes a computer to function in each step of the falsification verification method according to claim 4.

A computer-readable recording medium storing the falsification verification document creation program according to claim 5.
A computer-readable recording medium storing the falsification verification program according to claim 6.

  First, an embodiment of a falsification verification document creation apparatus, a falsification verification document creation method, a falsification verification document creation program, and a recording medium storing the program according to the present invention will be described.

  1A is a functional block diagram of the falsification verification document creation apparatus, and FIG. 1B is a hardware block diagram of the falsification verification document creation apparatus.

  1A, the falsification verification document creation apparatus 1 includes a processing target document image acquisition unit 111, an area definition unit 112, a falsification verification information embedding unit 113, and a printing unit 114. Further, in FIG. 1B, the falsification verification document creation apparatus (shown by the same reference numeral “1” because it is the same apparatus as the falsification verification document creation apparatus 1 of FIG. 1A) includes a CPU 121, a ROM 122, and a RAM 123. A hard disk 124, a printer 125, an image scanner 126, and a communication circuit 127. The RAM 123 stores a processing target document image acquisition program (scanner program, communication program, etc.), an area definition program, a falsification verification information embedding program, and a printing program. These programs constitute the falsification verification document creation program of the present invention, and in cooperation with the CPU 121 (or in cooperation with other components), the processing target document image acquisition means 111, the area definition means 112, and falsification It functions as verification information embedding means 113 and printing means 114. Each program can be stored in a recording medium such as a floppy disk or a magneto-optical disk and distributed.

  The document image to be created can be acquired by the image scanner 126 in FIG. 1B, or can be acquired from another device via the network or public line by the communication circuit 127 in FIG. 1B. It can also be acquired from the hard disk 124 of FIG. 1B, and can also be acquired from an application such as a word processor.

  The operation of the falsification verification document creation apparatus 1 shown in FIG.

  In the present embodiment, the processing target document image acquisition unit 111 acquires a document image DG that is a processing target as shown in FIG. The area defining unit 112 defines a plurality of rectangular areas in which adjacent parts overlap each other on the document image DG acquired by the processing target document image acquiring unit 111. The rectangular area in which the verification information is defined can be defined such that all or part of the page of the original document image DG (falsification verification document) overlap vertically or overlap left and right. In FIG. 2B, a part of the original document image DG is defined by a rectangular area A01 to A04. In FIG. 2C, a part of the original document image DG is defined by a rectangular area B01 to B04. Each case is shown.

  The falsification verification information embedding unit 113 divides and embeds the falsification verification information in each rectangular region defined by the region definition unit 112 in a portion that does not overlap with an adjacent rectangular region and a portion that overlaps. As the verification information, for example, as disclosed in the specification of Japanese Patent Application No. 2002-367853 by the applicant of the present application, a plurality of rectangular areas are defined in the falsification verification document, and the number of dots included in each rectangular area is an even number. Alternatively, it is set in advance to be an odd number, and when falsification occurs, the even / odd number of dots changes, so that falsification can be detected.

The printing unit 114 prints the document image DG in which the falsification verification information is embedded in each rectangular area by the falsification verification information embedding unit 113. From the document shown in FIG. Generation of a falsification verification document will be described. Here, a characteristic that the number of dots formed in each rectangular area is an even number or an odd number is used as the verification information.

  First, the document image DG shown in FIG. 2A is acquired by the processing target document image acquisition unit 111, and the region definition unit 112 has a plurality of adjacent ones of the document image DG partially overlapping each other. A rectangular area is defined (see FIG. 2B).

  The falsification verification information embedding unit 113 embeds dots in the rectangular areas A1, A2, and A3. Random numbers generated in advance of “0” or “1” are assigned to the rectangular areas A1, A2, and A3. When the random number is “0”, the random number is even, and when “1”, the odd number is odd. Thus, the number of dots is adjusted.

  In order to embed dots in the rectangular areas A1, A2, and A3, first, as shown in FIG. 3A, an overlapping portion (hereinafter referred to as an “overlapping portion”) C12 of the rectangular area A1 and the rectangular area A2, and In the overlapping portion C23 between the rectangular area A2 and the rectangular area A3, dots are embedded randomly (randomly). In the example of FIG. 3A, the number of dots in the overlapping portion C12 is seven, and the number of dots in the overlapping portion C23 is eight. Next, as shown in FIG. 3B, rectangular areas A1, A2, and A3 have rectangular areas A1 in areas where the overlapping areas of the rectangular areas do not overlap (hereinafter referred to as “non-overlapping parts”) D1, D2, and D3. , A2, and A3, dots are embedded in accordance with a preset random number “0” or “1”. In FIG. 3B, since the random numbers “1”, “0”, and “1” are assigned to the rectangular areas A1, A2, and A3, respectively, the rectangular area A1 has an odd number of dots. In the area A2, the number of dots needs to be an even number, and in the rectangular area A3, the number of dots needs to be an odd number.

  In order to adjust the number of dots in the rectangular areas A1, A2, and A3, after arranging the tods in the overlapping portions C12 and C23, the dots are arranged as much as possible in the non-overlapping portions D1, D2, and D3, and the arranged dots A method of adjusting the total number of the rectangular areas A1, A2, and A3 while deleting the above can be employed.

  When the dots are arranged in a grid pattern in the non-overlapping portion D1, the number of the dots is 56, and the total of 63 dots exists in the rectangular area A1, including the seven overlapping portions C12. Since the total number of dots in the rectangular area A1 is an odd number, in this case, the number of dots in the non-overlapping portion D1 is determined to be 56.

  When the dots are arranged in a lattice pattern so as not to overlap the characters in the non-overlapping portion D2, the number of the dots is 29. In the rectangular area A2, 15 overlapping portions C12 and C23 are combined, for a total of 44 dots. Will exist. Since the total number of dots in the rectangular area A2 is an even number, in this case, the number of dots in the non-overlapping portion D2 is determined to be 44.

  When the dots are arranged in a grid pattern in the non-overlapping portion D3, the number of the dots is 56, and a total of 64 dots exist in the rectangular area A3, including the eight overlapping portions C23. Since the total number of dots in the rectangular area A3 is an odd number, in this case, arbitrary dots in the non-overlapping portion D3 are deleted, and the total number of dots is determined to be 63.

  In addition to the above, if there are areas in the document image DG where it is desired to verify falsification, document image information for falsification verification is also generated for those areas in the same manner as described above. FIG. 4 shows an example of a falsification verification document image DG in which a dot pattern as verification information is superimposed on a plain background portion of the document image DG. In FIG. 4, dots are also formed in portions where the alteration verification area is not defined.

  The printing unit 114 can print the document image DG created by the falsification verification information embedding unit 113 to create a print document corresponding to the falsification verification.

  Hereinafter, an embodiment of a falsification verification apparatus, a falsification verification method, a falsification verification program, and a recording medium storing the program according to the present invention will be described.

  5A is a functional block diagram of the document alteration verification apparatus, and FIG. 5B is a hardware block diagram of the document alteration verification apparatus. 5A, the document falsification verification apparatus 2 includes a verification processing target document image acquisition unit 211, a region definition unit 212, a falsification verification information extraction unit 213, a verification unit 214, and a verification result output unit 215. I have. In FIG. 5B, the document falsification verification device (shown by the same reference numeral “2” because it is the same as the document falsification verification device 2 in FIG. 5A) includes a CPU 221, a ROM 222, a RAM 223, and a hard disk 224. A display 225, an image scanner 226, and a communication circuit 227. The RAM 223 stores a verification processing target document image acquisition program (scanner program, communication program, etc.), an area definition program, a falsification verification information extraction program, a verification program, and a verification result output program. Each of these programs constitutes the document falsification verification program of the present invention and cooperates with the CPU 221 (or further collaborates with other constituent elements) to verify the document image acquisition means 211 for verification processing, the area definition means 212, and falsification. It functions as verification information extraction means 213, verification means 214, and verification result output means 215. Each program can be stored in a recording medium such as a floppy disk or a magneto-optical disk and distributed.

  The document image OG to be verified can be acquired by the image scanner 226 in FIG. 5B, or acquired from another device through the network or public line by the communication circuit 227 in FIG. 5B. It can also be acquired from the hard disk 224 in FIG. 5B, or can be acquired from an application such as a word processor.

  Hereinafter, the operation of the document alteration verification apparatus 2 shown in FIG. First, the verification processing target document image acquisition unit 211 reads a document image OG that is a verification target. The area defining unit 212 defines the same rectangular area as the rectangular area defined by the area defining unit 112 in FIG. 1A for the document image OG.

  The falsification verification information extraction unit 213 counts the number of dots embedded in each rectangular area on the document image OG defined by the area definition unit 212, and extracts information on whether the number is even or odd as verification information. . For example, the falsification verification unit 213 uses the same method as that at the time of document creation, and the same value as the value “0” or “1” set when the verification document is created for each of the rectangular areas A1 to A3 (this value is As described above, it is generated as a random number when the verification document is created), and the even number / odd number of dots in the rectangular areas A1 to A3 is set to the even number / odd number set in advance. The presence or absence of falsification is determined based on whether or not it matches.

  That is, the falsification verification unit 213 determines whether the number of dots in the rectangular areas A1 to A3 of the document image OG extracted by the verification information extraction unit 212 is even or odd, and the falsification verification information embedding unit 113 determines the rectangular areas A1 to A1 of the document image DG. If the even / odd number of dots used when embedding verification information in A3 does not match, it is determined that the document image OG has been tampered with.

  FIG. 6A shows the amount description portion (rectangular area A2 (see FIGS. 3A and 3B)) of the document image DG corresponding to the falsification verification shown in FIG. 4 in the same manner as the document image DG. Created in the same way as the document image DG by tampering by cutting and pasting the amount description part of another document image (printed document) with different created amount description with a cutter or the like The figure shows a state in which tampering is performed by pasting the amount description portion of another document image (document data) with a different description of the amount of money as data in the rectangular area A2. FIG. 6B is a diagram showing a state after falsification as described above (a document image after falsification is indicated by OG).

  FIG. 7A is an explanatory diagram of the amount description portion of the legitimate document image DG ′ whose amount description is “¥ 500,000” created in the same manner as the document image DG, and is a rectangular area A1 ′, In A2 ′ and A3 ′, falsification verification dots are formed in the same manner as described with reference to FIGS.

  FIG. 7B shows the document image DG shown in FIG. 3 (the same as FIG. 3B) in which the amount description portion of the rectangular area A2 is “¥ 10,000”. FIG. 7 (C) shows a case where the amount description portion “¥ 500,000” of the document image DG ′ is cut by a cutter or the like and pasted on the rectangular area A2 portion of the document image DG and copied by a copying machine. Alternatively, a document image OG when the image data is tampered by pasting the amount described in the rectangular area A2 ′ of the document image DG ′ on the display as data on the rectangular area A2 portion of the document image DG on the display. Shows the part.

  When the falsification verification unit 213 detects the number of dots in the rectangular areas A1 to A3 in the document image OG in FIG. 6B, the number of dots in the rectangular area A1 is an odd number (63) and the number of dots in the rectangular area A2 is The odd number (43), the number of dots in the rectangular area A3 is an odd number (63), and the even number / odd number of the number of dots in the rectangular area A2 is verified by the falsification verification information embedding means 113 in the rectangular area A2 of the document image DG. Even number / odd number of the number of dots (44) used when embedding is not matched. Therefore, it is determined that the document image OG has been tampered with.

  The verification result output unit 214 can display the verification result obtained by the verification unit 213 on, for example, the display 225 of FIG. 5B or print it by a printer (not shown). For example, as shown in FIG. 8, the altered document image OG can be displayed on the display 225 with a region including the altered portion highlighted by red filling such as a red frame, a red underline, or the like.

  Note that the verification result may be displayed or printed only when the verification unit 213 detects falsification, or the verification result may be displayed or printed even when the verification unit 213 does not detect falsification. When the verification unit 213 detects falsification, a warning sound may be output from a speaker (not shown) separately from the display or print on the display or together with the display or print.

  By the way, a plurality of rectangular areas that do not have overlapping portions are defined in all or part of the document image to be verified, and each rectangular area is set to “1” or “0”. For example, the number of dots can be adjusted to be an odd number when it is “1” and an even number when it is “0”. FIG. 9B shows a part (rectangular regions x1, x2, x3) of the document image dg in which the verification information is embedded. In FIG. 9B, “1”, “0”, and “1” are set in the rectangular areas x1, x2, and x3, and the number of dots is odd (55), even (44), and odd, respectively. (55) is set. On the other hand, FIG. 9A also shows a part (rectangular areas x1 ′, x2 ′, x3 ′) of the document image dg ′ in which the verification information is embedded. In FIG. 9A, “1”, “0”, “1” are set in the rectangular areas x1 ′, x2 ′, x3 ′, and the number of dots is odd (55) and even (42), respectively. ), Odd numbers (55).

In FIG. 9C, the amount description portion “¥ 500,000” of the rectangular area x2 of the document image dg ′ is cut out by a cutter or the like, pasted on the rectangular area x2 portion of the document image dg, and copied by a copying machine. When falsification is performed or when the image data is pasted by pasting the amount described in the rectangular area x2 ′ of the document image dg ′ as data into the rectangular area x2 of the document image dg on the display by an image creation application or the like A document image og is shown. In the document image og of FIG. 9C, the copy source of the falsified part matches the falsification verification area even though it has been falsified, so that the falsified image happens to pass the falsification verification. There is a risk of this happening.

On the other hand, in the present embodiment, a rectangular region having an overlapping portion is defined in the falsification verification rectangular region document image, the number of dots in the dot arrangement in the overlapping portion is random, and each rectangular region document Since the odd number of dots in the dot array included in the image is set randomly, the number of dots in the dot array of all the rectangular area document images for verification in the image after tampering may pass the tampering verification by chance. The possibility of becoming an aspect becomes very low, and as a result, tampering can be reliably detected.

(A) is a functional block diagram of the falsification verification document creation device, and (B) is a hardware block diagram of the falsification verification document creation device. (A) is a diagram showing a document image DG which is a processing target for falsification verification document creation, (B) is a case where a part of the original document image is defined by four rectangular areas overlapping vertically, (C) Shows a case where a part of the original document image is defined by four rectangular areas overlapping in the left-right direction. (A) is a diagram showing a state in which dots are randomly (randomly) embedded in overlapping portions, and (B) is a diagram showing a state in which dots are embedded in non-overlapping portions D1, D2, and D3 according to random numbers. It is a figure which shows the document image for falsification verification which superimposed the dot pattern as verification information on the plain background part of a document image. (A) is a functional block diagram of the document alteration verification apparatus, and (B) is a hardware block diagram of the document alteration verification apparatus. FIG. 5A is a diagram illustrating a state in which the money amount description portion of the document image DG corresponding to the tampering verification illustrated in FIG. 4 is modified, and FIG. 5B is a diagram illustrating the document image OG after the document image DG has been modified. (A) is an explanatory diagram of the amount description portion of a document image with a description of the amount “¥ 500,000” created in the same manner as the document image, and (B) is an amount description of “¥ 10,000”. Is a diagram showing a document image DG that is "", and (C) is a diagram showing a state in which the amount description portion "¥ 500,000" of (A) is cut or pasted or pasted on the document image of (B) by a cutter or the like. . It is a figure which shows a mode that the altered part was emphasized and displayed on the display the document image OG tampered. FIG. 10 is a diagram illustrating a conventional tampering verification method, where (A) and (B) are diagrams illustrating a part of a document image in which verification information is embedded, and (C) is a monetary description portion “¥” of the document image of (A). 5B is a diagram illustrating a case where the document image of (B) is tampered with by cutting or pasting “500,000” with a cutter or the like.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Falsification verification document preparation apparatus 2 Document falsification verification apparatus 111 Processing object document image acquisition means 112 Area | region definition means 113 Falsification verification information embedding means 114 Printing means 121,221 CPU
122,222 ROM
123,223 RAM
124, 224 Hard disk 125 Printer 126, 226 Image scanner 127, 227 Communication circuit 211 Verification processing target document image acquisition unit 212 Area definition unit 2123 Tampering verification information extraction unit 214 Verification unit 215 Verification result output unit 225 Display

Claims (8)

A falsification verification document creation device that adds dots generated at predetermined intervals to a plain part of a falsification verification target image as falsification verification information,
A first rectangular area defined so as to cover a larger area than the tampering verification target image and a first overlapping area that overlaps only the first rectangular area are provided, and is adjacent only to the first rectangular area And a second rectangular area that is arranged adjacent to the first rectangular area, and a second overlapping area that overlaps only with the second rectangular area is provided. An area definition means for defining
Setting means for randomly setting the odd number of dots of the verification information included in the first rectangular area, the second rectangular area, and the third rectangular area;
First dot adding means for randomly adding dots to the plain portion of the first overlapping region and the second overlapping region;
The sum of the number of dots added to the first overlapping area in the portion other than the first overlapping area in the first rectangular area matches the oddity set by the setting means. A second dot adding means for adding dots;
The sum of the number of dots added to the first overlap region and the second overlap region in the second rectangular region, excluding the first overlap region and the second overlap region, A third dot adding means for adding dots so as to coincide with the odds set by the setting means;
In the third rectangular area, the sum of the number of dots added to the second overlapping area in the portion excluding the second overlapping area matches the oddity set by the setting means, A falsification verification document creation apparatus comprising a fourth dot addition means for adding dots . A document falsification verification device for verifying falsification of a document created by the falsification verification document creation device according to claim 1,
  For each of the first rectangular area, the second rectangular area, and the third rectangular area, the number of dots to be arranged is counted, and the counted value is an odd / even value set by the first setting means. Determining means for determining whether or not the
  A document falsification verification apparatus comprising falsification verification means for verifying falsification of a document based on a determination result of the determination means. A falsification verification document creation method for adding dots generated at predetermined intervals to a plain part of a falsification verification target image as falsification verification information,
  A first rectangular area defined so as to cover a larger area than the tampering verification target image and a first overlapping area that overlaps only the first rectangular area are provided, and is adjacent only to the first rectangular area And a second rectangular area that is arranged adjacent to the first rectangular area, and a second overlapping area that overlaps only with the second rectangular area is provided. An area definition step for defining
  A setting step for randomly setting the odd number of dots of the verification information included in the first rectangular area, the second rectangular area, and the third rectangular area;
  A first dot adding step of randomly adding dots to the plain portion of the first overlapping region and the second overlapping region;
  The sum of the number of dots added to the first overlapping area in the first rectangular area excluding the first overlapping area matches the oddity set by the setting step. A second dot adding step for adding dots;
  The sum of the number of dots added to the first overlap region and the second overlap region in the second rectangular region, excluding the first overlap region and the second overlap region, A third dot adding step for adding dots so as to match the odds set in the setting step;
  In the third rectangular area, the sum of the number of dots added to the second overlapping area in the portion excluding the second overlapping area matches the oddity set by the setting step, A falsification verification document creation method comprising a fourth dot addition step for adding dots. A document falsification verification method for verifying falsification of a document created by the falsification verification document creation method according to claim 3,
  The number of dots to be arranged is counted for each of the first rectangular area, the second rectangular area, and the third rectangular area, and the counted value is an odd / even value set by the first setting step. A determination step for determining whether or not the
  A document falsification verification method comprising a falsification verification step for verifying falsification of a document based on a determination result of the determination step. A falsification verification document creation program which causes a computer to function as the steps of the falsification verification document creation method according to claim 3. A falsification verification program for causing a computer to function as the steps of the falsification verification method according to claim 4. A computer-readable recording medium storing the falsification verification document creation program according to claim 5. A computer-readable recording medium storing the falsification verification program according to claim 6.

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