JPH0640189A - Card and method of certification thereof - Google Patents
Card and method of certification thereofInfo
- Publication number
- JPH0640189A JPH0640189A JP4199770A JP19977092A JPH0640189A JP H0640189 A JPH0640189 A JP H0640189A JP 4199770 A JP4199770 A JP 4199770A JP 19977092 A JP19977092 A JP 19977092A JP H0640189 A JPH0640189 A JP H0640189A
- Authority
- JP
- Japan
- Prior art keywords
- card
- infrared light
- layer
- hologram layer
- printing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/328—Diffraction gratings; Holograms
Landscapes
- Credit Cards Or The Like (AREA)
- Holo Graphy (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、キャッシュカード、ク
レジットカード、プリペイドカード等の認証が必要なカ
ード及びその認証方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a card, such as a cash card, a credit card, and a prepaid card, which requires authentication and a method for authenticating the card.
【０００２】[0002]
【従来の技術】従来、キャッシュカード、クレジットカ
ード、プリペイドカード等において、レリーフホログラ
ム等を貼り付けてその真実性の保証やカードの意匠性付
与が行われている。真実性の保証はホログラムの偽造困
難性を利用したものであり、ホログラムが貼り付けられ
たカードの真実性の確認は、目視による認証によって行
っていた。2. Description of the Related Art Conventionally, in cash cards, credit cards, prepaid cards and the like, relief holograms and the like have been attached to guarantee the authenticity of the holograms and to give the cards design. Guarantee of the authenticity utilizes the difficulty of forgery of the hologram, and the authenticity of the card to which the hologram is pasted is confirmed by visual authentication.
【０００３】[0003]
【発明が解決しようとする課題】上記のように、従来の
キャッシュカード等に用いられているホログラムの機能
は、目視による認証性を持たせたり、意匠性の付与が主
体であり、無人のカード処理装置での不正防止や認証に
関しては、全く機能を有していなかった。さらに、従
来、用いられていたレリーフホログラム等は偽造し難い
特徴はあるが、基本的に、同じ絵柄、情報しか付与する
ことができず、個体識別のための可変情報（例えば、通
し番号）は、ホログラムとは別の領域の磁気記録部や印
刷記録部に記録する必要があり、カード上のスペースや
意匠性に大きな制約があった。As described above, the function of the hologram used in the conventional cash card or the like is mainly to provide visual authenticity or to give a design property to an unmanned card. It had no function with regard to fraud prevention and authentication in the processing device. Furthermore, although the relief holograms and the like that have been conventionally used have the characteristic that it is difficult to forge, basically, only the same picture and information can be given, and variable information for individual identification (for example, serial number) is It is necessary to record in a magnetic recording section or a print recording section in an area different from the hologram, and there are great restrictions on the space on the card and the design.
【０００４】また、カードのホログラムに光学センサー
により認証可能な情報を記録する考え方もあったが、外
観目視により何らかの情報が記録されていることが知ら
れてしまい、偽造、変造を誘発する危険性があるという
問題があると共に、カードの意匠性を損なうという問題
があった。There is also the idea that information that can be authenticated by an optical sensor is recorded on the hologram of the card, but it is known that some information is recorded by visual inspection of the appearance, and there is a risk of inducing forgery or alteration. However, there is a problem that the design of the card is impaired.
【０００５】本発明はこのような状況に鑑みてなされた
ものであり、その目的は、無人のカード処理装置により
認証が可能で偽造、変造が困難なカード及びその認証方
法を提供することである。The present invention has been made in view of such a situation, and an object thereof is to provide a card which can be authenticated by an unmanned card processing device and is difficult to forge and falsify, and an authentication method thereof. .
【０００６】[0006]
【課題を解決するための手段】上記目的を達成する本発
明のカードは、カード基材上の少なくとも一部に、カー
ド基材側から順に、少なくとも、赤外光吸収又は反射イ
ンキ印刷、実質的に赤外光を透過し可視光を透過しない
隠蔽層、リップマン型ホログラム層が積層されているこ
とを特徴とするものである。A card of the present invention which achieves the above-mentioned object is at least part of a card base material, in order from the card base material side, at least infrared light absorbing or reflective ink printing, substantially. In addition, a concealing layer that transmits infrared light and a visible light that does not transmit visible light, and a Lippmann hologram layer are laminated.
【０００７】この場合、カード基材表面が赤外光反射性
であり、印刷が赤外光吸収インキからなる場合と、カー
ド基材表面が赤外光吸収性であり、印刷が赤外光反射イ
ンキからなるか、赤外反射層を介して赤外光吸収インキ
印刷が配置されてなる場合がある。In this case, the surface of the card substrate is infrared ray reflective and the printing is made of an infrared ray absorbing ink, and the surface of the card substrate is infrared ray absorbent and the printing is infrared ray reflective. It may consist of ink or an infrared light absorbing ink print arranged via an infrared reflective layer.
【０００８】また、本発明のカードの認証方法は、カー
ド基材上の少なくとも一部に、カード基材側から順に、
少なくとも、赤外光吸収又は反射インキ印刷、実質的に
赤外光を透過し可視光を透過しない隠蔽層、リップマン
型ホログラム層が積層されてなるカードの認証方法であ
って、前記ホログラム層及び隠蔽層を介して赤外光を照
明し、前記カード基材表面及び印刷により反射し、再度
前記隠蔽層及びホログラム層を透過して出てくる光を赤
外光検出装置により検出して、前記印刷により記録され
た記号、文字、コード等のパターンを読み取ることによ
りカードを識別することを特徴とする方法である。In the card authentication method of the present invention, at least a part of the card base material is sequentially arranged from the card base material side.
A method for authenticating a card comprising at least infrared light absorption or reflection ink printing, a concealing layer that substantially transmits infrared light and does not transmit visible light, and a Lippmann hologram layer, wherein the hologram layer and the concealment layer are concealed. Infrared light is radiated through the layer, reflected by the surface of the card substrate and printed, and again transmitted through the hiding layer and hologram layer, detected by an infrared light detection device, and printed. The method is characterized by identifying a card by reading a pattern such as a symbol, a character, or a code recorded by.
【０００９】この場合、ホログラム層に所定波長の可視
光を照明し、ホログラム層から再生されたパターンを可
視光検出装置により検出し、赤外光検出装置により検出
された検出信号と可視光検出装置により検出された検出
信号とに基づいてカードを識別するようにすることもで
きる。In this case, the hologram layer is illuminated with visible light of a predetermined wavelength, the pattern reproduced from the hologram layer is detected by the visible light detection device, and the detection signal and the visible light detection device detected by the infrared light detection device are detected. It is also possible to identify the card based on the detection signal detected by.
【００１０】[0010]
【作用】本発明のおいては、カード基材側から順に、少
なくとも、赤外光吸収又は反射インキ印刷、実質的に赤
外光を透過し可視光を透過しない隠蔽層、リップマン型
ホログラム層が積層されてなるので、外観上はホログラ
ム層の記録情報のみが見え、その下にある印刷情報は見
ることはできない。赤外光を照射して赤外光検出装置に
よりホログラム層の下にある印刷情報を検出識別するこ
とにより、無人のカード処理装置でカードの個体識別が
可能となる。また、ホログラム層と印刷が積層されてい
るため、カード上のデザインスペースの制約が大幅に減
少し、意匠性の高いカードが得られる。また、積層され
たホログラム層と印刷の何れかの情報を変造、改ざんし
ようとすると、もう一方の情報がダメージを受け、その
履歴が明らかになる。In the present invention, in order from the card substrate side, at least infrared light absorbing or reflecting ink printing, a concealing layer that substantially transmits infrared light and does not transmit visible light, and a Lippmann hologram layer are provided. Since they are laminated, only the recorded information of the hologram layer can be seen from the outside, and the printed information therebelow cannot be seen. By irradiating infrared light and detecting and identifying the print information under the hologram layer by the infrared light detecting device, it becomes possible to individually identify the card by the unattended card processing device. In addition, since the hologram layer and the print are laminated, restrictions on the design space on the card are significantly reduced, and a card with a high design is obtained. Further, if one tries to alter or falsify information on either the laminated hologram layers or the printing, the other information will be damaged and the history will be revealed.
【００１１】[0011]
【実施例】以下、本発明のカード及びその認証方法の実
施例について、図面を参照にして説明する。リップマン
型ホログラムは、銀塩写真フィルムのような光学記録材
料の片側から物体光を他方の側から参照光を入射させた
とき、光学記録材料の厚み方向に間隔ｄの透過率分布又
は屈折率分布の干渉縞が記録されたもので、干渉縞の間
隔ｄは、波長をλ、光学記録材料の屈折率をｎ、物体光
と参照光とのなす角をθとすると、 ｄ＝λ／（２ｎ・ｓｉｎθ／２） ・・・・（１） の関係にある。このようにして記録されたリップマン型
ホログラムは、波長選択性が高く、赤外線を含む白色光
を入射すると、波長λの光のみが回折され、記録した情
報が再生される。他の波長の光は回折されず透過する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a card and its authentication method of the present invention will be described below with reference to the drawings. The Lippmann hologram is a transmittance distribution or a refractive index distribution with an interval d in the thickness direction of the optical recording material when object light is incident from one side of an optical recording material such as a silver halide photographic film and reference light is incident from the other side. Where the wavelength d is λ, the refractive index of the optical recording material is n, and the angle between the object light and the reference light is θ, d = λ / (2n・ Sin θ / 2) ・ ・ ・ ・ (1) The thus-recorded Lippmann hologram has high wavelength selectivity, and when white light containing infrared rays is incident, only the light of wavelength λ is diffracted and the recorded information is reproduced. Light of other wavelengths is transmitted without being diffracted.
【００１２】本発明においては、上記のようなリップマ
ン型ホログラムを用い、その下に赤外光透過性の隠蔽層
を介して赤外光により読み取り可能な印刷情報を配置し
て、外観上は意匠性の高いリップマン型ホログラムに記
録された情報のみが見え、カードの認証は隠蔽層の下の
印刷情報を赤外光によって読み取って行うようにするこ
とである。以下、実施例に基づいて本発明を説明する。In the present invention, the Lippmann hologram as described above is used, and print information readable by infrared light is arranged under the hologram, which is opaque to the infrared light transmitting layer, to provide a design in appearance. Only the information recorded on the highly reliable Lippmann hologram can be seen, and the card is authenticated by reading the printed information under the concealment layer with infrared light. Hereinafter, the present invention will be described based on examples.
【００１３】図１は、本発明に基づくカードの実施例の
断面図であり、赤外光反射性のカード基材１の任意の位
置に接着剤層２を介して赤外光透過可視光吸収黒色隠蔽
層３が設けられ、その上に可視波長λ1 で再生可能なリ
ップマン型ホログラム層４が配置されている。そして、
黒色隠蔽層３の下側には赤外光吸収インキによる印刷５
がされており、外観上は、リップマン型ホログラム層４
に記録された情報だけが目視でき、黒色隠蔽層３の下の
印刷５の情報は見えない。FIG. 1 is a cross-sectional view of an embodiment of a card according to the present invention, in which infrared light is transmitted and visible light is absorbed through an adhesive layer 2 at an arbitrary position of an infrared light reflective card substrate 1. A black hiding layer 3 is provided, and a Lippmann hologram layer 4 which can be reproduced at a visible wavelength λ 1 is arranged on the black hiding layer 3. And
Printing on the underside of the black hiding layer 3 with infrared absorbing ink 5
And the appearance of the Lippmann hologram layer 4
Only the information recorded in 1 is visible and the information in the print 5 under the black concealing layer 3 is not visible.
【００１４】したがって、波長λ2 の赤外光をホログラ
ム層４側から照射すると、ホログラム層４、黒色隠蔽層
３を透過して印刷５に達する。印刷５の情報に従って吸
収され、カード基材１で反射された赤外光は、黒色隠蔽
層３、ホログラム層４を透過して出てくる。波長λ2 の
光のみを検知する光センサー６を配置し、印刷５情報と
して機械読み取り可能なバーコード、記号、文字等の可
変情報を利用することにより、無人のカード処理装置で
印刷５情報を読み取ってカードの個体識別が可能とな
る。Therefore, when infrared light of wavelength λ 2 is irradiated from the hologram layer 4 side, it passes through the hologram layer 4 and the black masking layer 3 and reaches the print 5. The infrared light absorbed according to the information of the print 5 and reflected by the card substrate 1 passes through the black masking layer 3 and the hologram layer 4 and comes out. By arranging the optical sensor 6 which detects only the light of the wavelength λ 2 and using the variable information such as the machine readable bar code, the symbol and the character as the print 5 information, the print 5 information is printed by the unmanned card processing device. It becomes possible to read and identify the individual card.
【００１５】図１の場合は、カード基材１が赤外光反射
性の場合であるが、カード基材１が赤外光吸収性の場合
には、印刷５に用いるインキとして赤外光反射性のもの
を用いるか、黒色隠蔽層３と基材１の間に赤外反射層を
設けるようにすればよい。なお、印刷５は接着剤層２の
下側に設けてもよい。また、隠蔽層３は必ずしも黒色で
ある必要はなく、白色を含む他の色であってもよい。た
だし、リップマン型ホログラム層４から再生される可視
波長λ1 の反射率が高いと、ホログラム層４から再生さ
れる情報が見え難くなり、また、その情報を後記のよう
に認証情報として用いる場合は、読み取り難くなり、望
ましくない。さらに、リップマン型ホログラム層４に
は、１個の情報のみでなく、波長多重で複数の情報を記
録しておいてもよい。In the case of FIG. 1, the card base material 1 is infrared light reflective, but when the card base material 1 is infrared light absorptive, infrared light reflective as an ink used for the printing 5 is used. It is possible to use a transparent material or to provide an infrared reflection layer between the black masking layer 3 and the base material 1. The print 5 may be provided below the adhesive layer 2. Further, the hiding layer 3 does not necessarily have to be black, and may have other colors including white. However, when the reflectance of the visible wavelength λ 1 reproduced from the Lippmann hologram layer 4 is high, the information reproduced from the hologram layer 4 becomes difficult to see, and when the information is used as the authentication information as described later, It becomes difficult to read, and is not desirable. Further, not only one piece of information but also a plurality of pieces of information may be recorded in the Lippmann hologram layer 4 by wavelength multiplexing.
【００１６】以上は、カードの機械読み取りによる認証
に黒色隠蔽層３の下の印刷５情報のみを利用し、ホログ
ラム層４の情報は目視上の認証情報、他の意匠上、その
他の情報として用いることを前提としていたが、ホログ
ラム層４の中にも機械読み取り用認証情報を記録し、こ
の情報を波長λ1 の光のみを検知する別の光センサー７
で読み取り、光センサー６で読み取った印刷５の情報と
同期、照合等をとることにより、より高度な認証を行う
ことが可能になる。その信号処理の一例を図２に示す。
この場合は、印刷５の印刷パターン５′及び、ホログラ
ム層４のホログラム記録パターン４′として同じバーコ
ードパターンを用いた例であり、この場合は、両光セン
サー６、７から得られる読み取り信号をアンド回路８に
入れ、両者が一致したときのみ、認証信号が出力される
ようにしている。したがって、ホログラム層４、印刷５
の何れかを変造、改ざんすると、最早認証情報を読み取
ることができず、高度な認証が可能になる。もちろん、
上記において、ホログラム層４、印刷５に記録する情報
は同じである必要はなく、また、両者の信号の処理も上
記のようにアンド回路による照合に限定されるものでは
なく、種々の公知の手法が採用できる。In the above, only the print 5 information under the black hiding layer 3 is used for the authentication by the machine reading of the card, and the information of the hologram layer 4 is used as the visual authentication information, other design information, and other information. However, another optical sensor 7 that records the machine-reading authentication information in the hologram layer 4 and detects only this light having the wavelength λ 1 is used.
It is possible to perform more advanced authentication by synchronizing with the information of the print 5 read by the optical sensor 6 and the information of the print 5 read by the optical sensor 6. An example of the signal processing is shown in FIG.
In this case, the same bar code pattern is used as the print pattern 5'of the print 5 and the hologram recording pattern 4'of the hologram layer 4. In this case, the read signals obtained from both optical sensors 6 and 7 are used. It is put in the AND circuit 8 so that the authentication signal is output only when the both match. Therefore, the hologram layer 4, the print 5
If any of the above is altered or tampered with, the authentication information can no longer be read, and high-level authentication becomes possible. of course,
In the above, the information recorded in the hologram layer 4 and the print 5 need not be the same, and the processing of the signals of both is not limited to the collation by the AND circuit as described above, and various known methods can be used. Can be adopted.
【００１７】ところで、リップマン型ホログラムは、干
渉縞の間隔を後から操作することで、情報を追記するこ
とができる。詳細は、本発明者の提案に係る特願平４−
１９９４８１号（発明の名称「ホログラムフィルム及び
その製造方法」）参照。この追記情報として、カード個
別に異なる情報を利用することができるので、上記認証
情報としてこれを用いるとより認証性が向上する。By the way, in the Lippmann hologram, information can be additionally written by operating the interval of the interference fringes later. For details, refer to Japanese Patent Application No. Hei 4-
See 199481 (Invention title: "Holographic film and its manufacturing method"). As the additional record information, different information can be used for each card. Therefore, if this is used as the authentication information, the authenticity is further improved.
【００１８】以上、本発明のカード及びその認証方法を
実施例に基づいて説明したが、本発明はこれら実施例に
限定されず種々の変形が可能である。The card and the authentication method for the card of the present invention have been described above based on the embodiments, but the present invention is not limited to these embodiments and various modifications can be made.
【００１９】[0019]
【発明の効果】以上の説明から明らかなように、本発明
のカード及びその認証方法によると、カード基材側から
順に、少なくとも、赤外光吸収又は反射インキ印刷、実
質的に赤外光を透過し可視光を透過しない隠蔽層、リッ
プマン型ホログラム層が積層されてなるので、外観上は
ホログラム層の記録情報のみが見え、その下にある印刷
情報は見ることはできない。赤外光を照射して赤外光検
出装置によりホログラム層の下にある印刷情報を検出識
別することにより、無人のカード処理装置でカードの個
体識別が可能となる。また、ホログラム層と印刷が積層
されているため、カード上のデザインスペースの制約が
大幅に減少し、意匠性の高いカードが得られる。また、
積層されたホログラム層と印刷の何れかの情報を変造、
改ざんしようとすると、もう一方の情報がダメージを受
け、その履歴が明らかになる。As is apparent from the above description, according to the card and the authentication method of the present invention, at least infrared light absorption or reflection ink printing, and substantially infrared light emission are performed in order from the card substrate side. Since the concealing layer that transmits and does not transmit visible light and the Lippmann hologram layer are laminated, only the recorded information of the hologram layer can be seen on the appearance, and the print information below it cannot be seen. By irradiating infrared light and detecting and identifying the print information under the hologram layer by the infrared light detecting device, it becomes possible to individually identify the card by the unattended card processing device. In addition, since the hologram layer and the print are laminated, restrictions on the design space on the card are significantly reduced, and a card with a high design is obtained. Also,
Alter the information of the laminated hologram layers and printing,
If you try to tamper with it, the other information will be damaged and its history will be revealed.
【００２０】なお、ホログラム層に記録された情報と印
刷情報を同時に検出し、両検出信号の同期、照合等の信
号処理により、より高度な認証を行うこともできる。It is also possible to detect information recorded on the hologram layer and print information at the same time, and perform higher-level authentication by performing signal processing such as synchronization of both detection signals and collation.
【図１】本発明に基づくカードの実施例の断面図であ
る。1 is a cross-sectional view of an embodiment of a card according to the present invention.
【図２】本発明によるカード認証の信号処理の一例を説
明するための図である。FIG. 2 is a diagram for explaining an example of signal processing for card authentication according to the present invention.
１…カード基材 ２…接着剤層 ３…黒色隠蔽層 ４…リップマン型ホログラム層 ５…印刷 ６、７…光センサー ４′…ホログラム記録パターン ５′…印刷パターン ８…アンド回路 DESCRIPTION OF SYMBOLS 1 ... Card base material 2 ... Adhesive layer 3 ... Black concealment layer 4 ... Lippmann hologram layer 5 ... Printing 6, 7 ... Optical sensor 4 '... Hologram recording pattern 5' ... Printing pattern 8 ... AND circuit
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｇ０３Ｈ 1/02 8106−2Ｋ Ｇ０６Ｋ 17/00 Ｔ 7459−5Ｌ 19/06 19/10 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification number Office reference number FI technical display location G03H 1/02 8106-2K G06K 17/00 T 7459-5L 19/06 19/10
Claims (6)
ド基材側から順に、少なくとも、赤外光吸収又は反射イ
ンキ印刷、実質的に赤外光を透過し可視光を透過しない
隠蔽層、リップマン型ホログラム層が積層されているこ
とを特徴とするカード。1. At least a part of a card base material, in order from the card base material side, at least infrared light absorption or reflection ink printing, a concealing layer that substantially transmits infrared light and does not transmit visible light, A card characterized by laminating a Lippmann hologram layer.
印刷が赤外光吸収インキからなることを特徴とする請求
項１記載のカード。2. The surface of the card substrate is infrared light reflective,
The card according to claim 1, wherein the printing is made of infrared light absorbing ink.
印刷が赤外光反射インキからなることを特徴とする請求
項１記載のカード。3. The surface of the card substrate is infrared light absorbing,
The card according to claim 1, wherein the printing is made of infrared light reflecting ink.
赤外反射層を介して赤外光吸収インキ印刷が配置されて
いることを特徴とする請求項１記載のカード。4. The surface of the card substrate is infrared light absorbing,
The card according to claim 1, wherein an infrared light absorbing ink print is arranged through an infrared reflecting layer.
ド基材側から順に、少なくとも、赤外光吸収又は反射イ
ンキ印刷、実質的に赤外光を透過し可視光を透過しない
隠蔽層、リップマン型ホログラム層が積層されてなるカ
ードの認証方法において、前記ホログラム層及び隠蔽層
を介して赤外光を照明し、前記カード基材表面及び印刷
により反射し、再度前記隠蔽層及びホログラム層を透過
して出てくる光を赤外光検出装置により検出して、前記
印刷により記録された記号、文字、コード等のパターン
を読み取ることによりカードを識別することを特徴とす
るカード認証方法。5. At least a part of the card substrate, in order from the card substrate side, at least infrared light absorption or reflection ink printing, a concealing layer that substantially transmits infrared light and does not transmit visible light, In a card authentication method in which a Lippmann hologram layer is laminated, infrared light is illuminated through the hologram layer and a masking layer, reflected by the card substrate surface and printing, and the masking layer and the hologram layer are again formed. A card authentication method, characterized in that the transmitted light is detected by an infrared light detection device, and the card is identified by reading the pattern of symbols, characters, codes, etc. recorded by the printing.
照明し、前記ホログラム層から再生されたパターンを可
視光検出装置により検出し、前記赤外光検出装置により
検出された検出信号と前記可視光検出装置により検出さ
れた検出信号とに基づいてカードを識別することを特徴
とする請求項５記載のカード認証方法。6. The visible light of a predetermined wavelength is illuminated on the hologram layer, the pattern reproduced from the hologram layer is detected by a visible light detection device, and the detection signal and the visible light detected by the infrared light detection device are detected. The card authentication method according to claim 5, wherein the card is identified based on a detection signal detected by the photodetector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19977092A JP3275250B2 (en) | 1992-07-27 | 1992-07-27 | Card and its authentication method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19977092A JP3275250B2 (en) | 1992-07-27 | 1992-07-27 | Card and its authentication method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0640189A true JPH0640189A (en) | 1994-02-15 |
| JP3275250B2 JP3275250B2 (en) | 2002-04-15 |
Family
ID=16413330
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19977092A Expired - Lifetime JP3275250B2 (en) | 1992-07-27 | 1992-07-27 | Card and its authentication method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3275250B2 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6280891B2 (en) | 1994-05-04 | 2001-08-28 | Hologram Industries S.A. | Multi-layer assembly and method for marking articles and resulting marked articles |
| US7085024B2 (en) * | 2001-05-30 | 2006-08-01 | Dai Nippon Printing Co., Ltd. | Hologram laminate and hologram label |
| WO2006137442A1 (en) * | 2005-06-23 | 2006-12-28 | Nitto Denko Corporation | Multilayer reflector, authentication card, bar code label, authentication system, and authentication region forming system |
| JP2007136907A (en) * | 2005-11-21 | 2007-06-07 | Dainippon Printing Co Ltd | Printed article and medium for judging truth |
| JP2007196608A (en) * | 2006-01-30 | 2007-08-09 | Toppan Printing Co Ltd | Article equipped with information recording medium, and reader for the information recording medium |
| JP2013190729A (en) * | 2012-03-15 | 2013-09-26 | Dainippon Printing Co Ltd | Hologram laminate and information recording medium |
| CN105047069A (en) * | 2015-06-19 | 2015-11-11 | 立德高科(北京)数码科技有限责任公司 | Anti-counterfeiting code graph formed by reversible heat-sensitive decoloration ink and methods for generating and reading anti-counterfeiting code graph |
| EP2289707B2 (en) † | 2002-04-03 | 2021-06-09 | De La Rue International Limited | Optically variable security device and method |
-
1992
- 1992-07-27 JP JP19977092A patent/JP3275250B2/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6280891B2 (en) | 1994-05-04 | 2001-08-28 | Hologram Industries S.A. | Multi-layer assembly and method for marking articles and resulting marked articles |
| US7085024B2 (en) * | 2001-05-30 | 2006-08-01 | Dai Nippon Printing Co., Ltd. | Hologram laminate and hologram label |
| US7268926B2 (en) | 2001-05-30 | 2007-09-11 | Dai Nippon Printing Co., Ltd. | Hologram laminate and hologram label |
| EP2289707B2 (en) † | 2002-04-03 | 2021-06-09 | De La Rue International Limited | Optically variable security device and method |
| WO2006137442A1 (en) * | 2005-06-23 | 2006-12-28 | Nitto Denko Corporation | Multilayer reflector, authentication card, bar code label, authentication system, and authentication region forming system |
| KR100934886B1 (en) * | 2005-06-23 | 2010-01-06 | 닛토덴코 가부시키가이샤 | Multilayer reflector, authentication card, bar code label, authentication system, and authentication region forming system |
| US8297522B2 (en) | 2005-06-23 | 2012-10-30 | Nitto Denko Corporation | Multilayer reflector, authentication card, bar code label, authentication system, and authentication region forming system |
| JP2007136907A (en) * | 2005-11-21 | 2007-06-07 | Dainippon Printing Co Ltd | Printed article and medium for judging truth |
| JP2007196608A (en) * | 2006-01-30 | 2007-08-09 | Toppan Printing Co Ltd | Article equipped with information recording medium, and reader for the information recording medium |
| JP2013190729A (en) * | 2012-03-15 | 2013-09-26 | Dainippon Printing Co Ltd | Hologram laminate and information recording medium |
| CN105047069A (en) * | 2015-06-19 | 2015-11-11 | 立德高科(北京)数码科技有限责任公司 | Anti-counterfeiting code graph formed by reversible heat-sensitive decoloration ink and methods for generating and reading anti-counterfeiting code graph |
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| Publication number | Publication date |
|---|---|
| JP3275250B2 (en) | 2002-04-15 |
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