JP2005055735A - Identification information containing substance using dna base sequence as identification information, object to be identified, and authentication method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an identification information containing substance using DNA base sequence as identification information, having no limitation in the kind of information to be identified, capable of performing authentication at high accuracy, and capable of immediately obtaining the information directly required at the site where the authentication is performed, and an object to be identified, and the authentication method. <P>SOLUTION: The identification information containing substance (1) or the object (6) to be identified contains an artificial DNA (2) composed of adenine (A), cytosine (C), guanine (G), and thymine (T) and a fluorescent agent (3) which emits a light so that a prescribed line spectrum (5) is obtained. In the authentication method, using the object (6) to be identified, base sequence information reproduced by extracting and analyzing the artificial DNA, as first identification information, and information obtained by analyzing the line spectrum, as second identification information, are used. The line spectrum may be related to the artificial DNA. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an identification information holding object, an identification object, and an authentication method that use a DNA base sequence as identification information.

  In recent years, there has been an increasing need for technologies for authenticating products and users for reasons such as the distribution of counterfeit products and the deterioration of social safety. As a means for improving the authentication accuracy, for example, Japanese Patent Laid-Open No. 2002-253203 discloses an identification information display object in which DNA base sequence information for identifying an individual is converted into a digital signal and fixed to a fixing object. Has been. According to this identification information display object, the identification information is a random element array that is unique to each person and has no regularity, and it is difficult for a third party to forge or imitate, so it is used as an effective identification means for authentication. be able to.

  However, although the information displayed on the identification information is excellent as identification means, if the identification information displayed itself is duplicated, proper authentication cannot be performed. was there. Therefore, an additive for adding identification means is disclosed in Japanese Patent Application Laid-Open No. 2003-157004 as a means for preventing duplication of the identification information holding material itself. This additive is composed of a composition constituted by associating a specific substance with each of a plurality of patterns of a plurality of symbols repeatedly appearing in the identification information. And since the composition itself becomes an identification means, and the identification information cannot be obtained unless it is analyzed, this additive and the identification information holding material to which this additive is added can be easily obtained by a third party. It cannot be duplicated.

On the other hand, as a technique for identifying the material itself, not the authenticity of the product, for example, an identification method disclosed in International Patent Application PCT / JP02 / 13705 has been devised. In this identification method, a compound having a narrow half-width of the emitted line spectrum (wavelength width at half-value of emission intensity) and a strong emission intensity is contained in the target material, and identification is performed using the emitted line spectrum. Is to do.
JP 2002-253203 A JP 2003-157004 A PCT / JP02 / 13705

  However, according to the above-mentioned additive or the identification information holding material containing the additive, it takes time to analyze the information contained therein, so it is not possible to immediately authenticate the product or user at the site, There is also a problem that necessary information cannot be obtained immediately. Furthermore, although artificial DNA is considered to be useful as the additive, the artificial DNA may be deteriorated and damaged when exposed to ultraviolet light or high temperature, and the identification ability may be lost.

  On the other hand, according to the above identification method, if predetermined line light emitted from the material is detected on site and a line spectrum emitted from the material is detected, predetermined encryption information corresponding to the line spectrum can be immediately extracted. it can. However, in this method, it is difficult to specify the line spectrum to be used if it overlaps with another spectrum having similar characteristics with similar wavelengths. Therefore, the compounds used are limited to those having a narrow half-width of the line spectrum and strong emission intensity, but not many compounds that meet the conditions have been found at present. In addition, when many kinds of such compounds are used, there is a risk of an unfavorable effect on cost increase and product quality. Therefore, this method has a problem that the types of encryption information corresponding to the line spectrum are limited.

  Therefore, the object of the present invention is not limited to the types of information that can be identified, can be authenticated with high accuracy, and can immediately obtain necessary information immediately at the site where authentication is performed. DNA base sequences can be used as identification information. An object of the present invention is to provide an identification information holding object, an identification object, and an authentication method to be used.

  The identification information holding material according to the present invention includes an artificial DNA composed of adenine, cytosine, guanine, and thymine, and a fluorescent agent that emits light to obtain a predetermined line spectrum. In the present invention, artificial DNA refers to any of adenine, cytosine, guanine, and thymine bases that do not overlap each other in accordance with identification information that consists of multiple symbols that repeatedly appear in multiple patterns. It is made to correspond. For example, if the identification information that forms the basis of the artificial DNA is a digital signal, the base of any one of adenine, cytosine, guanine, and thymine is added to each of the repeated patterns 00, 01, 10, 11 Each pattern is configured to correspond without overlapping. The identification target holding according to the present invention is, for example, a label, tag, ink, paint, coating agent, or packaging material or container as long as the integrity with the identification target is guaranteed. May be. And the paper, fiber material, and plastic composition which comprise a label and a tag can also become the identification object holding | maintenance thing concerning this invention.

  The inclusion may be one in which the artificial DNA and the fluorescent agent are mixed on a single substrate, or the artificial DNA and the fluorescent agent are present on different substrates. There may be.

  An identification object according to the present invention includes an artificial DNA composed of adenine, cytosine, guanine, and thymine, and a fluorescent agent that emits light to obtain a predetermined line spectrum.

  In the identification object according to the present invention, the inclusion may include the artificial DNA and the fluorescent agent. In the present invention, the identification object itself has an artificial DNA and a fluorescent agent. For example, the artificial DNA and the fluorescent agent are added to a material such as a plastic composition, paper, or fiber constituting the identification object or a part thereof. The case where it mixes directly is mentioned.

  In addition, the inclusion means that the artificial DNA and the fluorescent agent are attached to the identification object itself or mixed in a single base material in the identification information holding object covering the identification object itself. It may be. Furthermore, the inclusion includes that the artificial DNA and the fluorescent agent are attached to the identification object itself or are separately present on different substrates in the identification information holding object covering the identification object itself. It may be.

  In the identification information holding object or identification object according to the present invention, the line spectrum may be associated with the artificial DNA. In this case, the association may be made by classification of the artificial DNA, or may be made by the type of the base at a predetermined position of the artificial DNA. Furthermore, the digit of the data obtained by converting the information about the artificial DNA into a digital signal may correspond to the wavelength of the line spectrum, and the numerical value in the digit may correspond to the emission intensity of the line spectrum of the wavelength. . In the present invention, the classification of artificial DNA refers to the type of artificial DNA that is classified according to predetermined information items such as the type of identification target (whether human or thing), the sex of the user, the place of production of the product, and the like.

  The authentication method according to the present invention uses the identification object according to the present invention. The base sequence information reproduced by extracting and analyzing the artificial DNA is used as the first identification information, and the line spectrum is analyzed. The information obtained by doing so is used as the second identification information.

  In the authentication method according to the present invention, the inclusion may be such that the identification object has the artificial DNA and the fluorescent agent.

  In addition, the inclusion includes the artificial DNA and the fluorescent agent adhering to the identification object or being mixed in a single substrate in the identification information holding object covering the identification object. It may be. Further, the inclusion is such that the artificial DNA and the fluorescent agent are attached to the identification object or are present on different substrates in the identification information holding object covering the identification object. It may be.

  In the authentication method according to the present invention, the line spectrum may be associated with the artificial DNA. In this case, the association may be performed based on the segment of the artificial DNA, and the second identification information may be a segment of the artificial DNA. Alternatively, the association is made according to the type of the base at a predetermined location of the artificial DNA, and the second identification information is short base sequence information obtained by extracting a part of the base sequence information of the artificial DNA. Also good. Furthermore, the association is performed by associating the digit of the data obtained by converting the information about the artificial DNA into a digital signal corresponding to the wavelength of the line spectrum, and the numerical value in the digit corresponding to the emission intensity of the line spectrum of the wavelength. The second identification information may be information obtained by converting information regarding the artificial DNA into a digital signal.

  According to the identification information holding object and the identification object according to the present invention, the DNA base sequence information can be obtained as necessary by extracting and analyzing the artificial DNA. It can be used for authentication. In this case, the base sequence information to be used can be extracted and analyzed as long as necessary, the number of types is almost infinite, and the amount of information contained therein is extremely large, so the accuracy is high. Authentication is possible. On the other hand, if predetermined information is associated with the line spectrum, the information is specified by analyzing the line spectrum obtained from the emission of the fluorescent agent. Therefore, it is possible to obtain information immediately necessary at the site where authentication is performed by associating it with the line spectrum immediately.

  In addition, the line spectrum obtained from the emission of the fluorescent agent shifts the wavelength or changes the intensity depending on the combination of elements and the manufacturing method. It is extremely difficult to forge an identification information holding object or an identification object that emits a spectrum. Therefore, authentication can also be performed based on the correctness of the line spectrum. In addition, when an inorganic compound is used as a fluorescent agent, even when the identification information holding object or identification object is exposed to ultraviolet rays or a high temperature, and the artificial DNA is damaged and its analysis / decoding becomes difficult, Since the identification information is stored in the fluorescent agent, authentication can be performed.

  Furthermore, the line spectrum can be stored and used as viewable data by reading it as an image.

  In addition, when the identification target object concerning this invention itself has artificial DNA and a fluorescent agent, an identification target object and identification information become inseparable, and correct identification information can be reliably matched with an identification target object.

  On the other hand, in the identification object according to the present invention, the artificial DNA and the fluorescent agent are included in the identification information holding object covering the identification object or the identification information holding object attached to the identification object, so that Identification information can be added regardless of the shape or form.

  In addition, in the identification information holding object or identification object according to the present invention, when artificial DNA and a fluorescent agent are mixed in a single base material, cost reduction can be achieved, and adhesion work to the identification object, etc. Can be simplified. On the other hand, when the artificial DNA and the fluorescent agent are separately provided on different substrates, the present invention can be applied even when it is difficult to mix the artificial DNA and the fluorescent agent in the same substance.

  Further, in the identification information holding object or the identification object according to the present invention, more information included in the base sequence information of the artificial DNA can be effectively used by associating the line spectrum with the artificial DNA. Furthermore, in this case, by associating the line spectrum with the artificial DNA according to the classification of the artificial DNA, it becomes possible to successfully associate the line spectrum with few types and the artificial DNA with almost infinite number of types.

  Furthermore, by associating the line spectrum with the artificial DNA according to the type of base at a predetermined position of the artificial DNA, if only short base sequence information obtained by extracting a part of the base sequence of the artificial DNA is used, the line spectrum can be analyzed. Alone, it becomes possible to extract directly and immediately.

  Furthermore, the digitized data obtained by converting the information about the artificial DNA into a digital signal corresponds to the wavelength of the line spectrum, and the numeric value in the digit corresponds to the emission intensity of the line spectrum of the wavelength, thereby holding the artificial DNA. It becomes possible to extract more information directly and immediately.

  According to the authentication method of the present invention, by using a combination of the first identification information whose number of types is almost infinite and a large amount of information and the second identification information that can be immediately extracted as necessary, Thus, necessary information can be extracted immediately, and the types of information that can be identified are not limited, and high-accuracy authentication can be performed. In particular, if authentication can be performed only with the second identification information without the base sequence information of the artificial DNA, authentication can be performed immediately on site. In addition, it is extremely difficult for a third party who does not know the element composition and manufacturing method of the fluorescent agent to forge the identification information holding substance or identification object that emits the normal line spectrum. It becomes possible to perform authentication immediately on site.

  In addition, if possible, by including artificial DNA and a fluorescent agent in the identification object, it is possible to prevent erroneous authentication due to replacement of the identification information holding object.

  Further, in the authentication method according to the present invention, the artificial DNA and the fluorescent agent are included in the identification information holding material covering the identification object or the identification information holding material attached to the identification object, so that the shape and form are concerned. All kinds of identification objects can be authenticated. Furthermore, in these cases, the artificial DNA and the fluorescent agent are mixed in a single base material, so that the cost can be reduced, and the attaching operation to the identification object can be simplified. On the other hand, by making the artificial DNA and the fluorescent agent separately exist on different substrates, it can be applied even when it is difficult to mix the artificial DNA and the fluorescent agent in the same substance.

  Furthermore, in the authentication method according to the present invention, by associating the line spectrum with the artificial DNA, more information contained in the base sequence information of the artificial DNA can be used effectively. Furthermore, in this case, the line spectrum is associated with the artificial DNA by the classification of the artificial DNA, and the second identification information is set as the classification of the artificial DNA. It becomes possible to associate the first identification information that becomes infinite well.

  Furthermore, by associating the line spectrum with the artificial DNA according to the type of base at a predetermined position of the artificial DNA, the second identification information is short base sequence information obtained by extracting a part of the base sequence information of the artificial DNA. If only short base sequence information is available, it is possible to immediately extract it at the authentication site and directly use the base sequence information itself.

  Furthermore, the digitized data obtained by converting the information about the artificial DNA into a digital signal corresponds to the wavelength of the line spectrum, and the numeric value in the digit corresponds to the emission intensity of the line spectrum of the wavelength, thereby holding the artificial DNA. It becomes possible to extract more information directly and immediately.

  Specific examples of the identification information holding object, the identification object, and the authentication method according to the present invention will be described with reference to FIG. FIG. 1 is a conceptual diagram showing an identification information holding object and an identification object according to the present invention, a DNA base sequence used therein, and a line spectrum obtained from the light emission thereof. (A) Identification information holding object and identification object (B) shows the artificial DNA, and (c) shows the line spectrum.

  The identification object 6 in FIG. 1A is an object of authentication, and has a label 7 indicating the brand of the product. The label 7 is an ink that is an identification information holding material 1 including an artificial DNA 2 composed of adenine A, cytosine C, guanine G, and thymine T, and a fluorescent agent 3 that emits light to obtain a predetermined line spectrum 5. Is printed using.

  According to the identification information holding object 1 and the identification target object 6, by extracting and analyzing the artificial DNA 2, it is possible to obtain DNA base sequence information as necessary, and the base sequence information is used as identification information. Can be used for authentication. At this time, the base sequence information to be used can be extracted and analyzed as long as necessary, the number of types is almost infinite, and the amount of information contained therein is extremely large, so the accuracy is high. Authentication is possible. On the other hand, if predetermined information is associated with the line spectrum 5, the information is specified by analyzing the line spectrum 5 obtained from the light emission of the fluorescent agent 3. Accordingly, it is possible to obtain information immediately necessary at the site where authentication is performed by associating it with the line spectrum 5 immediately. In addition, since it is extremely difficult for a third party who does not know the element composition and the manufacturing method of the fluorescent agent 3 to forge the identification information holding substance or identification object that emits the normal line spectrum 5, Thus, authentication can also be performed. Furthermore, the line spectrum 5 can be stored and used as visually recognizable data by reading it as an image.

  Further, since the artificial DNA 2 and the fluorescent agent 3 are mixed in the ink printed on the label 7, the identification information can be added regardless of the shape and form simply by attaching the label 7 to the identification object 6. Can do. Furthermore, the label 7 can be manufactured simply by printing using the ink that is the identification information holding material 1, and the cost can be reduced. Also, the work for attaching the identification information to the identification object is simplified and used easily. be able to.

  The artificial DNA 2 is a digital signal 4 based on information obtained from the seller's DNA of the identification object 6 and predetermined information such as the production location and the production time, and each of 00, 01, 10, and 11 appearing repeatedly. Adenine A, cytosine C, guanine G, and thymine T are associated with the pattern, respectively. However, the bases corresponding to the patterns 00, 01, 10, and 11 may be any combination as long as the patterns do not overlap each other. In constructing the artificial DNA 2, it is possible to reflect the DNA base sequence of the merchandise seller as it is in the artificial DNA 2, but the personal DNA is known to an unspecified number of people from the viewpoint of protecting personal information. In order to avoid this, it is preferable to use information obtained by processing the original DNA. In addition, it is possible to include only the predetermined information without including the seller's DNA in the information that constitutes the artificial DNA 2. However, the DNA base sequence information is different depending on the individual and there is no possibility of duplication. It is particularly excellent as identification information for. If the identification target is food such as meat, the same applies to the case of using DNA that identifies the individual.

例えば、全ての波長λ１、λ２、λ３及びλ４にピークを有する線スペクトルは、区分１５に属する人工ＤＮＡ２と関連付けられることになる。 For the fluorescent agent 3, four types of compounds W, X, Y, and Z that emit light that can obtain line spectra of different wavelengths λ1, λ2, λ3, and λ4 are used. The line spectrum 5 is associated with the artificial DNA 2 by the classification of the artificial DNA 2. The number of sections of the artificial DNA 2 is 15, and the association between the line spectrum 5 and the sections of the artificial DNA 2 is shown in Table 1.

For example, a line spectrum having peaks at all wavelengths λ1, λ2, λ3, and λ4 is associated with the artificial DNA 2 belonging to the section 15.

  As described above, by associating the line spectrum 5 with the artificial DNA 2 according to the classification of the artificial DNA 2, it becomes possible to successfully associate the artificial DNA 2 with few kinds of line spectra and the almost unlimited number of kinds, and the base of the artificial DNA 2 More information contained in the sequence information can be used effectively.

表２において、情報Ｊは、販売者のＤＮＡに関し、認証用に使用される情報である。また、情報Ｋ、Ｌ及びＭは識別対象物６の属性に関する情報であり、情報Ｋ及びＬは種類によっては内容が共通する情報、情報Ｍは１５の種類全てにおいて内容が異なる情報である。このように、蛍光剤３の発光によって得られる線スペクトル５の種類が人工ＤＮＡ２の種類数と同じかそれ以上の場合、線スペクトル５を人工ＤＮＡ２の各種類に対応させることで、線スペクトル５により得られる情報から人工ＤＮＡ２の情報を全て利用することが可能となる。例えば、１５種類の人工ＤＮＡ２が保持する情報を、現場で使用できるデータベース等に予め記録しておけば、線スペクトル５より区分が１５であることが判明した人工ＤＮＡ２については、識別対象物６に関する情報Ｋ３、Ｌ４及びＭ１５をその場で特定することができる。 Fifteen types of artificial DNA 2 are used, and the classification is in accordance with the number assigned to each type of artificial DNA 2. Further, the artificial DNA 2 holds information relating to the seller's DNA and information relating to the attributes of the identification object 6. The former indicates a brand and is used for authentication, and the content is common to all 15 types. On the other hand, the latter presents information related to the identification object 6 to which the artificial DNA 2 is attached. Depending on the type such as the manufacturing place and the manufacturing time, the content is common, and all 15 types such as individual manufacturing information. In FIG. 1, the contents are different from each other. Table 2 shows the relationship between the type of artificial DNA 2, the content of information held therein, and the classification.

In Table 2, information J is information used for authentication regarding the seller's DNA. The information K, L, and M are information relating to the attributes of the identification object 6. The information K and L are information that has a common content depending on the type, and the information M is information that differs in content in all 15 types. Thus, when the type of the line spectrum 5 obtained by the light emission of the fluorescent agent 3 is the same as or more than the number of types of the artificial DNA 2, the line spectrum 5 is made to correspond to each type of the artificial DNA 2 by the line spectrum 5. It is possible to use all the information of the artificial DNA 2 from the obtained information. For example, if information stored in 15 types of artificial DNA 2 is recorded in advance in a database or the like that can be used in the field, the artificial DNA 2 whose classification is found to be 15 from the line spectrum 5 is related to the identification object 6. Information K3, L4 and M15 can be identified on the spot.

表３において、情報Ｋによる区分はその数が３つと、情報Ｌによる区分はその数が４つとなるので、蛍光剤として使用できる化合物は３種類あれば対応することができる。ただし、情報Ｋ或いは情報Ｌにより区分を決めた場合には、一つの区分に数種類の人工ＤＮＡ２が属することにるので、特定できる情報が制限されることになる。例えば、情報Ｋによる区分では、区分１に属する人工ＤＮＡ２は番号１〜５の５種類となるので、その人工ＤＮＡ２に関する情報としてＫ１を特定することはできるが、情報Ｌ、Ｍについては特定することができなくなる。 The classification of the artificial DNA 2 does not have to follow the type (number). When the types of compounds that can be used as the fluorescent agent 3 are limited and cannot cope with the types of the artificial DNA 2, depending on the types of the artificial DNA 2, the classification can be determined according to information having common contents. For example, in the case of the artificial DNA 2 shown in Table 2, the classification may be based on information K or information L. Table 3 shows the types of the artificial DNA 2, the content of information held therein, and the relationship between the information K classification and the information L classification.

In Table 3, since the number of classifications based on information K is three and the number of classifications based on information L is four, there are three types of compounds that can be used as fluorescent agents. However, when the classification is determined by the information K or the information L, since several types of artificial DNA 2 belong to one classification, information that can be specified is limited. For example, in the classification based on the information K, since the artificial DNA 2 belonging to the classification 1 has five types of numbers 1 to 5, K1 can be specified as information regarding the artificial DNA 2, but the information L and M must be specified. Can not be.

  In order to authenticate the identification object 6, the base sequence information reproduced by extracting and analyzing the artificial DNA 2 is used as the first identification information, and the information obtained by analyzing the line spectrum 5 is the first information. 2 is used as identification information.

  According to this authentication method, the first identification information whose number of types is almost infinite and has a large amount of information is used in combination with the second identification information that can be immediately extracted as necessary, so that it is necessary immediately at the site. Such information can be extracted immediately, and the types of information that can be identified are not limited, and high-accuracy authentication can be performed. In addition, it is extremely difficult for a third party who does not know the element composition and manufacturing method of the fluorescent agent to forge the identification information holding substance or identification target that emits the normal line spectrum. Even if it is right or wrong, it is possible to immediately authenticate in the field.

  Further, by including the artificial DNA 2 and the fluorescent agent 3 in the identification information holding object 1 (ink) attached to the identification object 6 via the label 7, any identification object 6 regardless of its shape or form. Authentication can be performed.

  Furthermore, by associating the line spectrum 5 with the artificial DNA 2, more information contained in the base sequence information of the artificial DNA 2 can be used effectively. In particular, if authentication can be performed only with the second identification information without the base sequence information of the artificial DNA 2, authentication can be performed immediately on site. For example, if the line spectrum 5 can correspond to each type of the artificial DNA 2, it is possible to use all the information of the artificial DNA 2 from the classification information (DNA number) obtained from the line spectrum 5, and authentication can be performed immediately.

FIG. 2 is a conceptual diagram showing another specific example of the identification information holding object according to the present invention. In the following specific examples, substantially the same parts as those in the above specific examples are denoted by the same reference numerals, and the description thereof will be simplified or omitted.
This identification information holding object 1 ′ is manufactured by printing an ink 7 a containing only artificial DNA 2 on a mount 7 b containing only the fluorescent agent 3, and corresponds to the label 7. As described above, by making the artificial DNA 2 and the fluorescent agent 3 separately exist on different base materials (ink 7a and mount 7b), it is applied even when it is difficult to mix the artificial DNA 2 and the fluorescent agent 3 in the same substance. be able to. Moreover, even if this identification information holding object 1 ′ is used, the identification object 6 can be authenticated in the same manner as when the identification object holding object 1 is used.

  When the identification object 6 is covered with a packaging material whose integrity with itself is guaranteed, the artificial DNA 2 and the fluorescent agent 3 are included in the packaging material, and the packaging material may be used as an identification information holding material. it can. In this case as well, the method for authenticating the identification object 6 is the same as the case where the identification object holding object 1 or the identification object holding object 1 ′ is used, but it is necessary even if the identification object 6 is still packaged. There is an advantage that identification information can be extracted. Further, it is possible to add identification information to an identification object 6 (for example, a fluid) that cannot be attached with the label 7.

  If possible, the identification object 6 itself may have the artificial DNA 2 and the fluorescent agent 3 without using the identification object holder 1 or 1 '. In this case, the identification object 6 and the identification information are inseparable, and correct identification information can be reliably associated with the identification object 6. Further, the method for authenticating the identification object 6 is the same as the case where the identification object holding object 1 or the identification object holding object 1 ′ is used, but an erroneous authentication occurs due to the replacement of the identification information holding object 1 or 1 ′. There is an advantage that can be prevented.

  FIG. 3 shows another specific example of the line spectrum used in the identification information holding object, the identification object, and the authentication method according to the present invention. FIG. 3 is a conceptual diagram of an artificial DNA in which the type of base at a predetermined location is associated with a line spectrum and the line spectrum. (A) shows the artificial DNA and (b) shows the line spectrum. Also in this case, four types of compounds W, X, Y, and Z that emit light that can obtain line spectra of different wavelengths λ1, λ2, λ3, and λ4 are used as the fluorescent agent 3. However, the concentration of each compound W, X, Y, and Z is adjusted so that the emission intensity I1, I2, I3, and I4 corresponds to the base type of the predetermined location X1, X2, X3, and X4 of the artificial DNA 2. Yes. The emission intensity is the strongest when the corresponding base is cytosine C, three-quarters the intensity of cytosine C in the case of thymine T, half the intensity of cytosine C in the case of guanine G, and In the case of adenine A, it is adjusted to be a quarter of cytosine C.

  As described above, when the line spectrum 5 is associated with the type of base at a predetermined location of the artificial DNA 2, if only the short base sequence information obtained by extracting a part of the base sequence of the artificial DNA 2 is used, only the analysis of the line spectrum 5 can be performed. It becomes possible to extract directly and immediately.

FIG. 4 shows still another specific example of the line spectrum used in the identification information holding object, the identification object, and the authentication method according to the present invention. FIG. 4 is a conceptual diagram of a digital signal in which a numerical value in a predetermined digit is associated with a line spectrum, and (a) shows a digital signal and (b) shows a line spectrum. Also in this case, four types of compounds W, X, Y, and Z that emit light that can obtain line spectra of different wavelengths λ1, λ2, λ3, and λ4 are used as the fluorescent agent 3. However, the concentrations of the respective compounds W, X, Y, and Z are adjusted so that the emission intensity thereof corresponds to the numerical values of the predetermined locations X5, X6, X7, and X8 of the digital signal 4. When the corresponding numerical value is 1, the light is emitted, and when it is 0, the light is not emitted. The digital signal 4 is obtained by converting the base sequence information of the artificial DNA 2 into a digital signal, but other information regarding the artificial DNA 2 may be converted into a digital signal instead of the digital signal 4.
This makes it possible to directly and immediately extract more information held by the artificial DNA.

The identification information holding thing and identification target object concerning this invention, the DNA base sequence used there, and the line spectrum obtained from the light emission are shown, (a) The conceptual diagram which shows the structure of an identification information holding thing and an identification target object, ( b) is a conceptual diagram showing artificial DNA, and (c) is a conceptual diagram showing a line spectrum. It is a conceptual diagram which shows the other specific example of the identification information holding material concerning this invention. The other example of the line spectrum used for the identification information holding | maintenance thing, identification target object, and authentication method concerning this invention is shown, (a) shows the artificial DNA with which the kind of base in a predetermined location was linked | related with the line spectrum. Conceptual diagram, (b) is a conceptual diagram showing a line spectrum. The other example of the line spectrum used for the identification information holding | maintenance thing, identification target object, and authentication method concerning this invention is shown, (a) is the concept which shows the digital signal with which the numerical value in a predetermined digit was linked | related with the line spectrum FIG. 4B is a conceptual diagram showing a line spectrum.

Explanation of symbols

1 Identification information holder 2 Artificial DNA
3 Fluorescent agent 5 Line spectrum 6 Identification object

Claims (27)

  It includes an artificial DNA (2) composed of adenine (A), cytosine (C), guanine (G), and thymine (T), and a fluorescent agent (3) that emits light to obtain a predetermined line spectrum (5). An identification information holding material (1) characterized by   The inclusion of identification information (1) according to claim 1, wherein the inclusion is that the artificial DNA (2) and the fluorescent agent (3) are mixed in a single base material.   The identification information holding material (1 ') according to claim 1, wherein the inclusion is that the artificial DNA (2) and the fluorescent agent (3) are present separately on different substrates.   The identification information carrier (1 or 1 ') according to any one of claims 1 to 3, wherein the line spectrum (5) is associated with the artificial DNA (2).   The identification information holding material (1 or 1 ') according to claim 4, wherein the association is made by classification of the artificial DNA (2).   The identification information holding material (1 or 1 ') according to claim 4, wherein the association is made according to a kind of the base at a predetermined position of the artificial DNA (2).   The association is such that the digit of the data obtained by converting the information related to the artificial DNA (2) into a digital signal corresponds to the wavelength of the line spectrum (5), and the numerical value in the digit is the value of the line spectrum (5) of the wavelength. 5. The identification information holding object (1 or 1 ′) according to claim 4, which is made by corresponding to the emission intensity.   It includes an artificial DNA (2) composed of adenine (A), cytosine (C), guanine (G), and thymine (T), and a fluorescent agent (3) that emits light to obtain a predetermined line spectrum (5). An identification object (6) characterized by   The identification object according to claim 8, wherein the inclusion includes the artificial DNA (2) and the fluorescent agent (3).   The inclusion includes that the artificial DNA (2) and the fluorescent agent (3) are mixed in a single substrate in the identification information holding material (1) attached to the artificial DNA (2) and the fluorescent agent (3). The identified object (6).   The inclusion is that the artificial DNA (2) and the fluorescent agent (3) are mixed in a single substrate in the identification information holding material (1) covering itself. Identification object (6).   The inclusion is that the artificial DNA (2) and the fluorescent agent (3) are present separately on different substrates in the identification information holding material (1 ') attached thereto. Identification object according to (6).   The inclusion is that the artificial DNA (2) and the fluorescent agent (3) are present separately on different substrates in the identification information holding material (1 ′) covering itself. The identified object (6).   The identification object according to any one of claims 8 to 13, wherein the line spectrum (5) is associated with the artificial DNA (2).   The identification object (6) according to claim 14, wherein the association is made by classification of the artificial DNA (2).   The identification object (6) according to claim 14, wherein the association is made according to a kind of the base at a predetermined position of the artificial DNA (2).   The association is such that the digit of the data obtained by converting the information related to the artificial DNA (2) into a digital signal corresponds to the wavelength of the line spectrum (5), and the numerical value in the digit is the value of the line spectrum (5) of the wavelength. The identification object (1 or 1 ') according to claim 14, which is made by corresponding to the emission intensity. Includes artificial DNA (2) composed of adenine (A), cytosine (C), guanine (G), thymine (T), and fluorescent agent (3) that emits light to obtain a predetermined line spectrum (5) Using identification object (6)
Base sequence information reproduced by extracting and analyzing the artificial DNA (2) is used as first identification information, and information obtained by analyzing the line spectrum (5) is used as second identification information. An authentication method characterized by that.   19. The authentication method according to claim 18, wherein the inclusion includes the identification object (6) having the artificial DNA (2) and the fluorescent agent (3).   The inclusion is that the artificial DNA (2) and the fluorescent agent (3) are mixed in a single substrate in the identification information holding material (1) attached to the identification object (6). The authentication method according to claim 18.   The inclusion is that the artificial DNA (2) and the fluorescent agent (3) are mixed in a single substrate in the identification information holding material (1) covering the identification object (6). The authentication method according to claim 18.   The inclusion is that the artificial DNA (2) and the fluorescent agent (3) are present separately on different substrates in the identification information holding material (1 ′) attached to the identification object (6). The authentication method according to claim 18, wherein   The inclusion is that the artificial DNA (2) and the fluorescent agent (3) are present on different substrates in the identification information holding material (1 ′) covering the identification object (6). The authentication method according to claim 18.   24. The authentication method according to any one of claims 18 to 23, wherein the line spectrum (5) is associated with the artificial DNA (2).   25. The authentication method according to claim 24, wherein the association is made by classification of the artificial DNA (2), and the second identification information is a classification of the artificial DNA (2).   The association is made according to the type of the base at a predetermined position of the artificial DNA (2), and the second identification information is a short base sequence obtained by extracting a part of the base sequence information of the artificial DNA (2) The authentication method according to claim 24, wherein the authentication method is information. The association is such that the digit of the data obtained by converting the information related to the artificial DNA (2) into a digital signal corresponds to the wavelength of the line spectrum (5), and the numerical value in the digit is the value of the line spectrum (5) of the wavelength. The authentication method according to claim 24, wherein the second identification information is information obtained by converting information on the artificial DNA (2) into a digital signal.

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