JP2004213691A - Truth or falsehood determination method of exchange ticket for money - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a truth or falsehood determination method by which creation of a fake is extremely difficult and capable of surely determining truth or falsehood. <P>SOLUTION: This truth or falsehood determination method is constituted so that the truth or falsehood is discriminated by embedding many electric resonance circuits in a base material of tickets for money, detecting positional information about the resonance circuits, printing bar codes or OCR characters, etc. created by utilizing a digit sequence to be determined by the obtained positional information on the ticket surface of the exchange tickets for money, detecting the positional information about the resonance circuits in the case of determining the truth or falsehood, reading the digit sequence to be determined by the obtained positional information, the bar codes or the OCR characters, etc. and comparing them with the obtained digit sequence. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

  The present invention relates to an authenticity judgment method for judging whether bills such as banknotes, gift certificates, government bond securities, municipal bond securities, investment securities, and securities such as stock certificates are genuine or counterfeit.

  Conventionally, in order to prevent counterfeiting, vouchers are printed using special materials and paper made by a special papermaking method, and intricate prints and fine portraits are printed by intaglio printing and other special printing methods. It has been created in.

However, attempts to forge banknotes etc. have been around for a long time. As a result, illegal counterfeiting cases tend to increase. In Europe and the United States and other countries, this tendency is even more pronounced. Various counterfeiting prevention methods, such as embedding, mixing fine metal particles that reflect radar waves, etc. into paper materials, changing from paper materials to plastic supports, pasting holograms and printing barcodes Have been tried.
Prevention of forgery is an attempt to make counterfeit money difficult to forge, and at the same time, many attempts are made to perform authenticity determination to determine whether the banknote is genuine or counterfeit. (For example, see Patent Document 1)

Japanese Unexamined Patent Publication No. 5-101249 is an invention related to a device for judging the authenticity of a voucher sheet, in which conductive materials are attached to upper and lower portions of an insulating layer, and a part of the conductive materials is connected to each other to form an LC resonance circuit. It discloses a means for determining whether or not the sheet is a counterfeit by inspecting the resonance frequency of the sheet being formed.

    The present invention has been made in view of such a situation, and the problem to be solved by the present invention is to make counterfeiting of cash vouchers difficult, and to clearly determine authenticity without relying on empirical and subjective judgments. It is an object of the present invention to provide a method for judging the authenticity of cash vouchers that prevents the intention of counterfeiting.

  The present invention solves the above-mentioned problems by means described in the following embodiments.

  (1) The first aspect of the present invention is that a plurality of small and thin resonant circuits that resonate with an electromagnetic wave of a specific frequency are randomly dispersed and embedded in a part of a base material constituting a voucher at the time of manufacturing the base material. A method for determining the authenticity of a voucher, comprising detecting a position information of the resonance circuit, and converting a bar code or an OCR character created by using a number sequence determined by the obtained position information into the voucher. When printed on a sheet of a kind, when judging authenticity, the position information of the resonance circuit is detected, and a number string determined by the obtained position information and a number obtained by reading the bar code or the OCR character etc. This is an authenticity determination method characterized by comparing a column with an authenticity.

  (2) In the second aspect of the present invention, in the first aspect, the barcode or the OCR character or the like detects the position information of the resonance circuit and forms a numeric string determined by the obtained position information. This is an authenticity determination method characterized by being created using a number string encrypted based on the number.

  ADVANTAGE OF THE INVENTION According to this invention, the bar code or OCR created using the positional information of the small resonant circuit randomly embedded in the base material which comprises a cash voucher, and the specific number string determined by the said positional information Since characters and the like are printed on the face of the cash vouchers and authenticity is discriminated using information that is difficult for human eyes to recognize, it is very difficult to create counterfeit products. In the case of forgery, since the authenticity can be reliably determined, it is possible to realize highly secure authenticity determination of cash vouchers.

  Hereinafter, embodiments of the present invention will be described in more detail.

(Explanation of basic structure of cash vouchers)
The structure of cash vouchers according to the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram showing an information recording unit 1 and an information recording unit 2 of a voucher of the present invention. In the figure, 1 indicates an information recording unit 1, 2 indicates an information recording unit 2, and 3 indicates cash vouchers.

  In the present invention, when paper or a material of the same quality as paper, or a thin material is used as the base material of the cash vouchers 3, the conductive wire is spirally wound around the base material once to several times. A large number of coils, which are randomly embedded, are used as the information recording unit 1, and the information recording unit 1 is determined based on the presence or absence of resonance with respect to external radio wave emission in the area of the predetermined information recording unit 1 and its position information. Determine the number sequence. The information recording unit 2 is a barcode or an OCR character string created by combining the number string and the ticket number of the cash vouchers.

(Explanation of manufacturing process for cash vouchers)
The manufacturing process of the vouchers according to the present invention will be described. When the paper money according to the present invention uses a paper-based material, a thin material, or the like as a base material, first, a coil is embedded in the base material when the base material is manufactured. For example, a method of randomly dispersing a large number of coils on a paper substrate and coating and laminating the same with a material of the same or different type, or a method of dispersing and embedding the coils in the substrate during papermaking is used. After the base material is completed, the background pattern, face value, issuer name, and the like are printed on both surfaces of the base material in the same manner as ordinary cash vouchers. The buried coil has its own resonance frequency according to the diameter, the number of turns, etc., so if the presence or absence of resonance is detected in a specific bandwidth including those frequencies and combined with the position data of the detector, The position information of the place where the coil is embedded can be obtained.

  The coil may be any part of the vouchers 3. In order to determine the position information where the coil is embedded, a coordinate origin, a reference line, and the like, which are reference points for detection, are provided in the printed figure when printing the front and back surfaces. The detection of the resonance circuit can be performed by detection by a resonance frequency, detection by X-ray fluoroscopy, detection by a metal detection device, and the like, and position information is obtained by performing measurement while moving the detector probe in the XY directions. .

  The information recording unit 1 is divided into grids along the X axis and the Y axis on the measurement coordinates, and 0 is assigned to a cell where a resonance circuit is detected, and 1 is assigned to a cell where a resonance circuit is not detected. Can be obtained as a binary number sequence. If the detection is performed in 5 rows x 5 columns, 25 digits in binary system and 8 digits in decimal system will be obtained. In view of the fact that 8 to 9 digits of alphanumeric characters are printed, it can cover almost the same numerical range. Of course, the number range can be easily expanded by increasing the number of rows or columns.

  The information recording unit 2 provided on at least one of the front and back surfaces of the cash vouchers, stores the ticket number of the vouchers 3 and the numerical value (position information of the embedded coil) recorded in the information recording unit 1. The combined two-dimensional barcode, OCR character string, and the like (hereinafter, referred to as a two-dimensional code) are formed by printing using an ink that cannot be read by visible light (hereinafter, referred to as an invisible ink).

The two-dimensional code is, for example, when the ticket number of the vouchers is A, the numerical value obtained from the information recording unit 1 is B, and a special random number determined by the issuer side of the vouchers is α.
(A + B) × α = C,
Where α = n (integer)
Or A × B × α = C,
Where α = n ÷ 10n ′ (n, n ′: integer)
A two-dimensional code is obtained by determining C determined by a formula like above, arranging the ticket numbers A of the bills in the X-axis direction, and dividing C in the Y-axis direction according to the number of digits of A. be able to.

  Invisible ink is used for printing the two-dimensional code. The invisible ink is an ink that does not absorb light having a wavelength in the visible region. For example, a material having an absorption or reflection characteristic in an infrared wavelength region of about 900 to 1000 nm, or a material having an absorption region in an ultraviolet wavelength region. Alternatively, the ink is preferably a colorless or light-colored ink containing a substance that emits fluorescence by ultraviolet rays.

  Examples of the dye having an absorption range in the infrared wavelength region include a cyanine dye, a phthalocyanine dye, a naphthoquinone dye, an anthraquinone dye, a zirol dye, a triphenylmethane dye, and the like. A glass powder body having a particle size of about several μm and containing about 60% by weight may be used. As a glass material serving as a base material, oxide glass, fluoride glass, chalcogen glass, or the like can be used.

  Since ultraviolet rays are absorbed by many substances, it is not easy to obtain good contrast of an invisible bar code. However, many substances that emit fluorescence by ultraviolet rays are known, and Ca containing a small amount of Mn, Ag, etc. , Ba, Cd, and the like, and organic fluorescent pigments containing dyes such as diaminostilbene dyes, fluorescein, and thioflavin can be used. The two-dimensional code can be printed by a convenient printing method such as letterpress, offset, gravure, silk screen, thermal transfer, and ink jet.

  The two-dimensional code printed with the invisible ink can be detected and decoded by an electromagnetic wave having a wavelength other than visible light, that is, ultraviolet light or infrared light, and is difficult to be detected by human eyes. For this reason, there is an advantage that there is no difference in appearance from conventional cash vouchers and the design is preferable, and it is more difficult for human eyes to visually recognize the printed vouchers by being mixed with printed graphics on the front and back surfaces. In addition, ordinary copiers and color copiers use visible light and cannot copy two-dimensional codes printed with invisible ink, and there is no risk of forgery with such devices. There is also an advantage.

  When the base material constituting the bills of the present invention is a paper-based material or a thin material, a resonance circuit embedded in the base material is formed by forming a resonance circuit buried in the base material with a coil having a diameter of several mm by a very fine wire and a number of turns of about 1 to 3 turns. Since it is used, it is difficult to detect the external appearance, the tactile sensation, and the like, and it is difficult to visually recognize it by seeing through visible light because it is hidden between the printed figures on the front and back tickets. The position of the information recording unit 1 can be set arbitrarily on the issuer side, and if the reference points, reference lines, etc. are scattered in the printed figures on the front and back tickets, the information cannot be known to outsiders at all. It becomes.

  In addition, the information recording unit 2 includes a ticket number A of the voucher, a numerical value B obtained from the information recording unit 1, and a two-dimensional code encrypted by a special random number α determined by the issuer of the voucher. It is very difficult to detect and decode the two-dimensional code because the two-dimensional code is printed by the invisible ink so as to be scattered in the printed figure on the front and back sides.

  Therefore, it is extremely difficult to forge the vouchers according to the present invention, and the authenticity can be easily and accurately identified. Even if the existence of the information recording unit 1 and the information recording unit 2 is known and their numerical values, two-dimensional codes, etc. are read, the analysis of the encryption system becomes a major obstacle, so that the security is extremely high and effective. It becomes a forgery prevention method.

(Explanation of authentication method)
At the time of authentication, first, it is detected whether or not both the information recording unit 1 and the information recording unit 2 are present in the cash voucher or the like. If both exist, the authenticity is determined by comparing the two.

  That is, a plurality of small and thin resonant circuits that resonate with electromagnetic waves of a specific frequency are randomly dispersed and embedded in a part of the base material constituting the vouchers when manufacturing the base material. In addition, the position information of the resonance circuit is detected, and a number sequence determined by the obtained position information, and a number sequence obtained by reading the above bar code or OCR character or the like printed on the surface of a cash voucher. Is determined by comparing with.

Hereinafter, examples of the present invention will be described in more detail.
In the step of forming the paper base material, a plurality of coils, each of which was formed by turning a varnished copper wire having a thickness of 0.1 mm once to three times so as to form a circle having a diameter of 5 mm, were randomly dispersed and embedded. After the paper base material was completed, the paper base material was cut into an appropriate size, and a background pattern, characters, a number A of a character string, and the like were printed on both front and back surfaces by intaglio printing. After the printing is completed, the upper side and the left end side of the copy-forgery-inhibited pattern portion are defined as reference lines of the XY axis, and the probe of the resonance frequency detecting device is moved along the XY axis, and 5 rows in the X axis and 5 columns in the Y axis direction. The resonance frequency is detected at a bandwidth of 50 MHz to 500 MHz for a total of 25 locations, and 0 is assigned when no detection is performed, and 1 is assigned when detection is performed. The numerical sequence was obtained and converted to a decimal value to obtain a numerical value B.

A random number α is appropriately determined to obtain (A + B) × α = C, and A is divided into the first column, C is divided by the number of digits of A and arranged as the second column, the third column,. It was converted to a barcode sequence to obtain a two-dimensional code. This two-dimensional code is printed by an inkjet printing method using an invisible ink containing a cyanine dye as a main component and overlaid on a printed figure on a paper-based substrate to prepare a sample that meets the object of the present invention. Was completed.

It is the schematic which shows the information recording part 1 and the information recording part 2 of the banknotes of this invention.

Explanation of reference numerals

1 Information recording unit 1
2 Information recording unit 2
3 gold note

Claims (2)

A method for determining the authenticity of bills, wherein a plurality of small and thin resonant circuits that resonate with an electromagnetic wave of a specific frequency are randomly dispersed and embedded in a part of the base material constituting the bill when manufacturing the base material. ,
Detecting the position information of the resonance circuit, printing a barcode or OCR characters created using a numeric string determined by the obtained position information on the face of the cash vouchers,
At the time of authenticity determination, the position information of the resonance circuit is detected, and a number string determined by the obtained position information is compared with a number string obtained by reading the barcode or the OCR character or the like. A method for determining the authenticity of cash vouchers. The barcode or the OCR character or the like is characterized in that it is created by detecting position information of the resonance circuit and using a number string encrypted based on a number string determined by the obtained position information. The authenticity determination method for cash vouchers according to claim 1.

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