EP1747539B1 - Method and device for recognising the authenticity of security characteristics on valuable documents and/or security documents - Google Patents

Method and device for recognising the authenticity of security characteristics on valuable documents and/or security documents Download PDF

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Publication number
EP1747539B1
EP1747539B1 EP05734323.8A EP05734323A EP1747539B1 EP 1747539 B1 EP1747539 B1 EP 1747539B1 EP 05734323 A EP05734323 A EP 05734323A EP 1747539 B1 EP1747539 B1 EP 1747539B1
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Prior art keywords
security
valuable
security document
geometric pattern
document
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German (de)
French (fr)
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EP1747539A1 (en
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Manfred Paeschke
Oliver Muth
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Bundesdruckerei GmbH
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Bundesdruckerei GmbH
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    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/06—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using wave or particle radiation
    • G07D7/12—Visible light, infrared or ultraviolet radiation
    • G07D7/1205—Testing spectral properties
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/004—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using digital security elements, e.g. information coded on a magnetic thread or strip
    • G07D7/0043—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using digital security elements, e.g. information coded on a magnetic thread or strip using barcodes

Definitions

  • the invention relates to a method for reading security features on security and / or security documents with the features of claim 1 and a corresponding device according to the features of claim 10.
  • security systems are required which are capable of containing security features. or to detect security documents mounted on a carrier or to verify a product provided with a security feature.
  • the carrier can be, for example, a letter, large letter or maxi letter, on which the value document is randomly arranged in the form of one or more stamps.
  • the security features accommodated on or in the security or security document contain information that is generally not readily visible. Examples are magnetic or electromagnetic peculiarities, certain material properties as well as characteristics, which are detectable in the UV, IR and NIR. Typically, special, tailored to the particular case sensors are used; which detect one or more such properties.
  • Other luminescent substances which are suitable as security feature for value documents are in DE 198 03 997 A1 , of the WO 98/39392 A1 , of the DE 199 17 887 A1 described.
  • the principal presence of the phosphor on the document of value is detected.
  • the temporal emission profile of the luminescence can be determined ( EP 1 158 459 A1 ).
  • the DE 101 13 268 A1 describes a system for checking the presence of a security feature on a value document.
  • a line-shaped scanning line is generated, the length of which is dimensioned such that it detects the security feature of a document passed past the document of value, even if the latter is mounted disorderly on a support.
  • the security feature After being excited by the laser light, the security feature emits, after the effect described above, short-wavelength luminescent light which is picked up by a photodetector and fed to the further evaluation as a luminescence raw signal.
  • the intensity profile of the emitted radiation in a specific wavelength range over a predetermined measurement period after the excitation is analyzed and a real / false statement is drawn up.
  • the publication DE 102 12 734 A1 describes a method for the identification and simultaneous authentication of objects.
  • the system is based on a standard barcode laser scanner.
  • the test object is also provided with a luminescent security feature which serves to establish the authenticity and is spectrally evaluated in a separate measuring channel.
  • the security feature can be over the known printing processes such as screen printing, intaglio printing, gravure printing offset, Letterset, ink jet, etc. be printed.
  • it can be applied as a transparent print below the visible motif if the material composition of the motif is such that it is suitable for the actual verification, that is, for example, carried out in a color sufficiently transparent to the excitation and luminescence wavelengths is.
  • the value and / or security document is optically scanned in strip form, with periodically pulsed electromagnetic radiation stimulated, wherein the sampling frequency is selected so that fine pixels are resolved to within the range of a few microns. It then emits luminescence radiation from which raw signals are obtained. Both the scanning / excitation and the luminescence can take place in the entire electromagnetic wavelength range, but especially in the non-visible range and especially in the NIR range. From the raw signals, the sampled geometric pattern is extracted. The information encoded therein is output.
  • the security feature is thus no longer hidden at random in the motif or distributed over this area, but assigned to a geometric pattern in which information is coded.
  • structural features and the information associated with them are extracted from the time-resolved intensity of the luminescence raw signal.
  • an advantageous extension of the conventional method results because structural information is stored with the authenticity feature and with this additional information, for example, a nominal value or country coding can be read out.
  • the invention also relates to a device for authenticity detection of security features on security and / or security documents, wherein at least one security element in or on the security and / or security document on or is applied, and the security element is contained in a geometric pattern.
  • the device contains a scanning system with which the value and / or security document can be optically scanned.
  • the scanning system comprises a device for exciting the security feature of the value and / or security document with periodically pulsed excitation radiation to obtain raw luminescent signals from the security feature, and means for extracting the sampled geometric pattern and associated information from the raw luminescence signals.
  • the geometric pattern is embodied as a bar code which can be read and decoded relatively simply and reliably or if a pattern is selected which is invariant or star-shaped or completely rotationally symmetrical against rotation through 90 ° and 180 °, because the Measurement signal is then independent of the orientation of the disorderly applied stamp and the evaluation reliability is thus significantly increased.
  • the scanning is preferably carried out in a line with a scan line extending over the value and / or security document, at which the carrier of the value and / or security document is moved linearly at a constant speed.
  • the information encoded in the pattern is the face value of the value and / or security document and / or its country encoding, or whatever information is most commonly used to identify the value document
  • the system according to the invention has a test device with which the luminescence raw signal can be checked in terms of wavelength and intensity profile, in particular for the verification of the time constant. It also contains a decoding device for the geometric pattern extracted from the luminescence raw signal, in particular the bar code, as well as an output device for outputting a true / false statement and for outputting the information encoded in the geometric pattern.
  • the Fig. 1 explains the basic principle.
  • the luminescence raw signal reflects characteristic geometric features.
  • the x ⁇ t ⁇ correlation is clearly visible, i. as the x-dimension of the bar-like field increases, the signal becomes correspondingly wider.
  • the intensity increases according to the y-dimension of the marked field.
  • the respective orientations thus differ significantly from each other.
  • the Fig. 2 shows examples of geometric structures in which the security feature can be advantageously incorporated.
  • the upper row contains printed patterns containing the luminescent-substance security feature.
  • Underneath is the associated pattern of the luminescence raw signal, in which the printed geometry is reflected.
  • the sampling frequency is chosen so that fine pixels are resolved to within the range of a few microns. If specific information is assigned to the individual geometries, then, for example, nominal values, country codes, indications of origin can be derived in a differentiated manner.
  • patterns as shown under D and E are particularly favorable, since they provide the same signals when rotated by 90 ° and facilitate the evaluation according to glued-on value documents, labels or stamps.
  • Particularly suitable are star-shaped patterns, which are invariant with respect to even smaller angular distortions.
  • FIG. 3 shows further embodiments for printed motifs (top row) and the associated luminescence raw signals.
  • Rotationally symmetric patterns in the form of circular rings which can also consist of several concentric rings with different widths and spacings, are invariant with respect to any rotations of the value document and thus considerably increase the evaluation reliability.
  • FIG. 4 a special embodiment is shown.
  • the feature (upper square) is applied in the form of a bar code. Since according to the present invention, the spatial resolution is determined by the frequency of the excitation pulses, the stroke width can be designed so that thin lines are no longer resolved. In the lower picture you can see that the luminescence raw signal no longer reflects the thin line of the pattern. It can thus be deposited in this way redundant non-information.
  • FIG. 5 a block diagram for a possible evaluation logic is shown. From the luminescence raw signal generated with a specific pulse frequency, the wavelength and intensity profile, for example in the form of a time constant, are checked after appropriate filtering. Depending on the agreement of these parameters with given values, a true / false statement is issued. In combination with this evaluation, the geometric pattern, for example in the form of a printed bar code, is additionally extracted and the information contained therein is decoded. In this way, for example, the nominal value, a country code, the manufacturer or another characteristic of the value document can be read out.

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Inspection Of Paper Currency And Valuable Securities (AREA)

Description

Die Erfindung betrifft ein Verfahren zum Auslesen von Sicherheitsmerkmalen auf Wert- und/oder Sicherheitsdokumenten mit den Merkmalen des Anspruchs 1 sowie eine entsprechende Vorrichtung gemäß den Merkmalen des Anspruchs 10. In zunehmendem Maße werden Sicherheitssysteme benötigt, die in der Lage sind, Sicherheitsmerkmale enthaltende Wert- oder Sicherheitsdokumente zu erkennen, die auf einem Träger angebracht sind, oder ein Produkt verifizieren können, das mit einem Sicherheitsmerkmal versehen ist. Der Träger kann bspw. ein Brief, Groß- oder Maxibrief sein, auf dem ungeordnet das Wertdokument in Form einer oder mehrerer Briefmarken angeordnet ist. Als Wert- oder Sicherheitsdokument im Sinne vorliegender Erfindung gelten aber auch Banknoten, Ausweise, Verpackungen, Label, Aufkleber und Tickets, insbesondere bedruckbare oder auf andere Weise mit Sicherheitsmerkmalen versehbare Erzeugnisse.The invention relates to a method for reading security features on security and / or security documents with the features of claim 1 and a corresponding device according to the features of claim 10. Increasingly, security systems are required which are capable of containing security features. or to detect security documents mounted on a carrier or to verify a product provided with a security feature. The carrier can be, for example, a letter, large letter or maxi letter, on which the value document is randomly arranged in the form of one or more stamps. However, banknotes, identity cards, packaging, labels, stickers and tickets, in particular printable products or products that can be provided with security features in other ways, also count as security or valuable documents within the meaning of the present invention.

Die auf bzw. im Wert- oder Sicherheitsdokument untergebrachten Sicherheitsmerkmale bergen Informationen, die in der Regel nicht ohne weiteres sichtbar sind. Beispiele sind magnetische oder elektromagnetische Besonderheiten, bestimmte Materialeigenschaften sowie Charakteristika, die im UV, IR und NIR nachweisbar sind. Typischerweise werden hierfür spezielle, auf den jeweiligen Fall zugeschnittene Sensoren eingesetzt; die ein oder mehrere solcher Eigenschaften detektieren.The security features accommodated on or in the security or security document contain information that is generally not readily visible. Examples are magnetic or electromagnetic peculiarities, certain material properties as well as characteristics, which are detectable in the UV, IR and NIR. Typically, special, tailored to the particular case sensors are used; which detect one or more such properties.

In diesem Zusammenhang beschreibt die DE 101 13 267 A1 Antistokes-Leuchtstoffe, die bei Anregung mit bestimmter elektromagnetischer Strahlung charakteristische Lumineszenzeigenschaften aufweisen, wobei die emittierte Strahlung kurzwelliger als die Anregungsstrahlung ist. Weitere Lumineszenzstoffe, die sich als Sicherheitsmerkmal für Wertdokumente eignen, sind in der DE 198 03 997 A1 , der WO 98/39392 A1 , der DE 199 17 887 A1 beschrieben.In this context, the describes DE 101 13 267 A1 Antistokes phosphors which exhibit characteristic luminescence properties when excited by certain electromagnetic radiation, the emitted radiation being shorter wavelength than the excitation radiation. Other luminescent substances which are suitable as security feature for value documents are in DE 198 03 997 A1 , of the WO 98/39392 A1 , of the DE 199 17 887 A1 described.

Bekannt ist ( DE 196 49 874 A1 ), den Lumineszenzfarbstoff großflächig auf einem Wertdokument, bspw. einer Ausweiskarte aufzubringen und anschließend partiell so abzudecken, dass ein Code gebildet wird, in dem benutzerrelevante Daten abgelegt sind, die zur Echtheitsüberprüfung des Dokuments herangezogen werden.It is known ( DE 196 49 874 A1 To apply the luminescent dye over a large area on a document of value, eg. An identification card and then partially cover so that a code is formed in which user-relevant data are stored, which are used to verify the authenticity of the document.

In herkömmlichen Systemen wird die prinzipielle Anwesenheit des Leuchtstoffes auf dem Wertdokument festgestellt. Dabei kann bspw. der zeitliche Emissionsverlauf der Lumineszenz ermittelt werden ( EP 1 158 459 A1 ).In conventional systems, the principal presence of the phosphor on the document of value is detected. In this case, for example, the temporal emission profile of the luminescence can be determined ( EP 1 158 459 A1 ).

Die DE 101 13 268 A1 beschreibt ein System zur Überprüfung der Anwesenheit eines Sicherheitsmerkmals auf einem Wertdokument. Mit einem Laser und geeigneter Optik wird dabei eine strichförmige Abtastlinie erzeugt, deren Länge so bemessen ist, dass sie das Sicherheitsmerkmal eines an der Abtastlinie vorbeigeführten Wertdokuments erfasst, auch wenn letzteres ungeordnet auf einem Träger angebracht ist. Das Sicherheitsmerkmal emittiert nach Anregung durch das Laserlicht nach dem zuvor beschriebenen Effekt kurzwelligeres Lumineszenzlicht, das von einem Photodetektor aufgenommen und als Lumineszenz-Rohsignal der weiteren Auswertung zugeführt wird. In dieser wird das Intensitätsprofil der emittierten Strahlung in einem bestimmten Wellenlängenbereich über einen vorgegebenen Messzeitraum nach der Anregung analysiert und eine Echt-/Unecht-Aussage erstellt.The DE 101 13 268 A1 describes a system for checking the presence of a security feature on a value document. With a laser and suitable optics, a line-shaped scanning line is generated, the length of which is dimensioned such that it detects the security feature of a document passed past the document of value, even if the latter is mounted disorderly on a support. After being excited by the laser light, the security feature emits, after the effect described above, short-wavelength luminescent light which is picked up by a photodetector and fed to the further evaluation as a luminescence raw signal. In this, the intensity profile of the emitted radiation in a specific wavelength range over a predetermined measurement period after the excitation is analyzed and a real / false statement is drawn up.

Die Druckschrift DE 102 12 734 A1 beschreibt ein Verfahren zur Identifizierung und gleichzeitigen Echtheitsüberprüfung von Gegenständen. Das System basiert auf einem üblichen Barcode-Laserscanner. Auf dem zu prüfenden Gegenstand ist außer einem Barcode, der zur Identifizierung dient, auch ein lumineszierendes Sicherheitsmerkmal aufgebracht, das zur Feststellung der Echtheit dient und in einem getrennten Messkanal spektral ausgewertet wird.The publication DE 102 12 734 A1 describes a method for the identification and simultaneous authentication of objects. The system is based on a standard barcode laser scanner. On the to In addition to a barcode which serves for identification, the test object is also provided with a luminescent security feature which serves to establish the authenticity and is spectrally evaluated in a separate measuring channel.

In US 4 047 033 ist ein Verfahren zur Echtheitserkennung von Sicherheitsmerkmalen auf Wert und/oder Sicherheitsdokumenten bekannt, bei dem das Sicherheitselement als geometrisches Muster ausgebildet ist. Das Wert- und/oder Sicherheitsdokument wird optisch abgetastet, wobei das Sicherheitsmerkmal mit periodisch gepulster elektromagnetischer Strahlung zur Emission von Lumineszenzstrahlung angeregt wird. Die Lumineszenz-Rohsignale werden zur Ermittlung der Echtheit des Wert- und/oder Sicherheitsdokuments hinsichtlich ihrer Wellenlänge und der Zeitkonstanten überprüft, woraus ein Hinweis auf das Vorliegen oder das Fehlen der Echtheit ausgegeben wird.In US 4,047,033 a method for authenticity detection of security features on value and / or security documents is known in which the security element is designed as a geometric pattern. The security and / or security document is scanned optically, the security feature being excited by periodically pulsed electromagnetic radiation for emitting luminescence radiation. The luminescence raw signals are checked to determine the authenticity of the value and / or security document with regard to their wavelength and the time constant, from which an indication of the presence or absence of authenticity is issued.

Mit der Erfindung wird das Auslesen von Sicherheitsmerkmalen der vorgenannten Art weiter verbessert.With the invention, the reading of security features of the aforementioned type is further improved.

Nach dem erfindungsgemäßen Verfahren zur Echtheitserkennung von Sicherheitsmerkmalen auf Wert- und/oder Sicherheitsdokumenten ist mindestens ein Sicherheitselement in oder auf das Wert- und /oder Sicherheitsdokument ein- oder aufgebracht, wobei es in ein geometrisches Muster eingebunden ist. Das Sicherheitsmerkmal kann dabei über die bekannten Druckverfahren wie Siebdruck, Stichtiefdruck, Rastertiefdruck Offset, Letterset, Ink-Jet u.s.w. aufgedruckt werden. Insbesondere kann es als transparenter Druck unterhalb des sichtbaren Motivs appliziert werden, wenn die stoffliche Zusammensetzung des Motivs so beschaffen ist, dass sie für die eigentliche Verifikation geeignet ist, also bspw. in einer Farbe ausgeführt ist, die für die Anregungs- und Lumineszenzwellenlängen ausreichend transparent ist.According to the inventive method for authentication of security features on value and / or security documents at least one security element in or on the security and / or security document on or applied, where it is integrated into a geometric pattern. The security feature can be over the known printing processes such as screen printing, intaglio printing, gravure printing offset, Letterset, ink jet, etc. be printed. In particular, it can be applied as a transparent print below the visible motif if the material composition of the motif is such that it is suitable for the actual verification, that is, for example, carried out in a color sufficiently transparent to the excitation and luminescence wavelengths is.

Das Wert- und/oder Sicherheitsdokument wird streifenförmig optisch abgetastet, und dabei mit periodisch gepulster elektromagnetischer Strahlung angeregt, wobei die Abtastfrequenz so gewählt ist, dass feine Pixel bis in den Bereich von wenigen µm aufgelöst werden. Es emittiert daraufhin Lumineszenz-Strahlung, aus der Rohsignale gewonnen werden. Sowohl die Abtastung/Anregung als auch die Lumineszenz können dabei im gesamten elektromagnetischen Wellenlängenbereich, insbesondere aber im nichtsichtbaren Bereich und ganz besonders im NIR-Bereich stattfinden. Aus den Rohsignalen wird das abgetastete geometrische Muster extrahiert. Die darin codierte Information wird ausgegeben.The value and / or security document is optically scanned in strip form, with periodically pulsed electromagnetic radiation stimulated, wherein the sampling frequency is selected so that fine pixels are resolved to within the range of a few microns. It then emits luminescence radiation from which raw signals are obtained. Both the scanning / excitation and the luminescence can take place in the entire electromagnetic wavelength range, but especially in the non-visible range and especially in the NIR range. From the raw signals, the sampled geometric pattern is extracted. The information encoded therein is output.

Das Sicherheitsmerkmal wird somit nicht mehr zufällig im Motiv versteckt oder flächig über dieses verteilt, sondern einem geometrischen Muster zugeordnet, in dem Information codiert ist. Erfindungsgemäß werden aus der zeitaufgelösten Intensität des Lumineszenz-Rohsignals Strukturmerkmale und die mit ihnen verbundene Information extrahiert.The security feature is thus no longer hidden at random in the motif or distributed over this area, but assigned to a geometric pattern in which information is coded. According to the invention, structural features and the information associated with them are extracted from the time-resolved intensity of the luminescence raw signal.

Mit der vorliegenden Erfindung ergibt sich eine vorteilhafte Erweiterung des herkömmlichen Verfahrens, weil mit dem Echtheitsmerkmal strukturelle Information hinterlegt wird und mit dieser Zusatzinformation beispielsweise eine Nominalwert- oder Ländercodierung ausgelesen werden kann.With the present invention, an advantageous extension of the conventional method results because structural information is stored with the authenticity feature and with this additional information, for example, a nominal value or country coding can be read out.

Die Erfindung betrifft auch eine Vorrichtung zur Echtheitserkennung von Sicherheitsmerkmalen auf Wert- und/oder Sicherheitsdokumenten, wobei mindestens ein Sicherheitselement in oder auf das Wert- und /oder Sicherheitsdokument ein- oder aufgebracht ist, und das Sicherheitselement in einem geometrischen Muster enthalten ist. Die Vorrichtung enthält ein Abtastsystem, mit dem das Wert- und/oder Sicherheitsdokument optisch abtastbar ist. Das Abtastsystem umfasst eine Einrichtung zur Anregung des Sicherheitsmerkmals des Wert- und/oder Sicherheitsdokument mit periodisch gepulster Anregungsstrahlung, um Lumineszenz-Rohsignale vom Sicherheitsmerkmal zu erhalten, sowie eine Einrichtung zur Extraktion des abgetasteten geometrischen Musters und der damit verbundenen Information aus den Lumineszenz-Rohsignalen.The invention also relates to a device for authenticity detection of security features on security and / or security documents, wherein at least one security element in or on the security and / or security document on or is applied, and the security element is contained in a geometric pattern. The device contains a scanning system with which the value and / or security document can be optically scanned. The scanning system comprises a device for exciting the security feature of the value and / or security document with periodically pulsed excitation radiation to obtain raw luminescent signals from the security feature, and means for extracting the sampled geometric pattern and associated information from the raw luminescence signals.

Besonders vorteilhaft ist es, wenn das geometrische Muster als Strichcode ausgebildet ist, der sich relativ einfach und sicher auslesen und decodieren läßt oder wenn ein Muster gewählt wird, das gegen Verdrehung um 90° und 180° invariant oder sternförmig oder vollständig rotationssymmetrisch ist, weil das Messsignal dann von der Orientierung der ungeordnet aufgebrachten Briefmarke unabhängig ist und die Auswertesicherheit damit erheblich gesteigert wird.It is particularly advantageous if the geometric pattern is embodied as a bar code which can be read and decoded relatively simply and reliably or if a pattern is selected which is invariant or star-shaped or completely rotationally symmetrical against rotation through 90 ° and 180 °, because the Measurement signal is then independent of the orientation of the disorderly applied stamp and the evaluation reliability is thus significantly increased.

Die Abtastung erfolgt bevorzugt zeilenförmig mit einer sich über das Wert- und/oder Sicherheitsdokument erstreckenden Abtastlinie, an der der Träger des Wert- und/oder Sicherheitsdokuments linear mit konstanter Geschwindigkeit vorbeibewegt wird.The scanning is preferably carried out in a line with a scan line extending over the value and / or security document, at which the carrier of the value and / or security document is moved linearly at a constant speed.

Vorzugsweise ist die in dem Muster codierte Information der Nominalwert des Wert- und/oder Sicherheitsdokuments und/oder dessen Ländercodierung, oder überhaupt diejenige Information, die zur Kennzeichnung des Wertdokuments am häufigsten herangezogen wirdPreferably, the information encoded in the pattern is the face value of the value and / or security document and / or its country encoding, or whatever information is most commonly used to identify the value document

Das erfindungsgemäße System weist eine Prüfeinrichtung auf, mit der das Lumineszenz-Rohsignal nach Wellenlänge und Intensitätsprofil, insbesondere zur Verifizierung der Zeitkonstante überprüfbar ist. Ferner enthält es eine Decodiereinrichtung für das aus dem Lumineszenz-Rohsignal extrahierte geometrische Muster, insbesondere den Strichcode sowie eine Ausgabeeinrichtung, zur Ausgabe einer Echt-/Unecht-Aussage und zur Ausgabe der im geometrischen Muster codierten Information.The system according to the invention has a test device with which the luminescence raw signal can be checked in terms of wavelength and intensity profile, in particular for the verification of the time constant. It also contains a decoding device for the geometric pattern extracted from the luminescence raw signal, in particular the bar code, as well as an output device for outputting a true / false statement and for outputting the information encoded in the geometric pattern.

Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der nachfolgenden Figurenbeschreibung.Further features and advantages of the invention will become apparent from the following description of the figures.

Es zeigen:

Fig. 1:
Die Korrelation eines einfachen Lumineszenzmotivs und Lumineszenzsignals am Beispiel eines aufgedruckten Balkens
Fig. 2:
Ausführungsformen für gedruckte Motive und zu erwartende Signale
Fig. 3:
Weitere Ausführungsformen für gedruckte Motive
Fig. 4:
Spezielle Ausführungsform mit Hinterlegung redundanter Nichtinformation
Fig. 5:
Ein Blockschaltbild für ein Ausführungsbeispiel zur Auswertung der Lumineszenz-Rohsignale nach der Erfindung
Show it:
Fig. 1:
The correlation of a simple luminescence motif and luminescence signal using the example of a printed bar
Fig. 2:
Embodiments for printed motifs and expected signals
3:
Other embodiments for printed motifs
4:
Special embodiment with storage of redundant non-information
Fig. 5:
A block diagram for an embodiment for evaluating the luminescence raw signals according to the invention

Die Fig. 1 erläutert das Grundprinzip. Die obere Reihe zeigt einen Balken, der horizontal, diagonal und vertikal verdruckt ist und den Leuchtstoff enthält. Wird der Prüfling mit konstanter Geschwindigkeit längs der Koordinate x mit einer Anregungsstrahlung der Pulsfrequenz ω = 2 KHz am Sensor vorbeigeführt und dabei streifenförmig abgetastet, gibt das zeitliche Intensitätsprofil die in Transportrichtung aufgedruckte Verifikationsstoff-Konzentration wieder. Auf diese Weise lassen sich örtlich (hier in x-Richtung) aufgelöste Intensitätsprofile erstellen.The Fig. 1 explains the basic principle. The top row shows a bar that is horizontally, diagonally and vertically printed and contains the phosphor. If the test object is guided past the sensor at constant speed along the coordinate x with an excitation radiation of the pulse frequency ω = 2 KHz and scanned in a strip, the temporal intensity profile reproduces the verification substance concentration printed in the transport direction. In this way it is possible to create spatially resolved intensity profiles (here in the x-direction).

Das Lumineszenz-Rohsignal spiegelt charakteristische geometrische Merkmale wieder. Insbesondere ist die x{t} Korrelation deutlich zu sehen, d.h. mit zunehmender x-Ausdehnung des balkenartigen Feldes wird das Signal entsprechend breiter. Umgekehrt steigt die Intensität entsprechend der y-Ausdehnung des markierten Feldes. Die jeweiligen Ausrichtungen unterscheiden sich also signifikant voneinander.The luminescence raw signal reflects characteristic geometric features. In particular, the x {t} correlation is clearly visible, i. as the x-dimension of the bar-like field increases, the signal becomes correspondingly wider. Conversely, the intensity increases according to the y-dimension of the marked field. The respective orientations thus differ significantly from each other.

Die Fig. 2 zeigt Beispiele für geometrische Strukturen, in die das Sicherheitsmerkmal vorteilhafterweise eingebunden werden kann. Die obere Reihe enthält Druckmuster, welche das Sicherheitsmerkmal in Form eines Lumineszenzstoffs enthalten. Darunter ist das zugehörige Muster des Lumineszenz-Rohsignals abgebildet, in dem sich die aufgedruckte Geometrie widerspiegelt. Die Abtastfrequenz ist dabei so gewählt, dass feine Pixel bis in den Bereich von wenigen µm aufgelöst werden. Sind nun den einzelnen Geometrien bestimmte Informationen zugeordnet, so lassen sich bspw. Nominalwerte, Ländercodierungen, Herkunftsbezeichnungen differenziert ableiten.The Fig. 2 shows examples of geometric structures in which the security feature can be advantageously incorporated. The upper row contains printed patterns containing the luminescent-substance security feature. Underneath is the associated pattern of the luminescence raw signal, in which the printed geometry is reflected. The sampling frequency is chosen so that fine pixels are resolved to within the range of a few microns. If specific information is assigned to the individual geometries, then, for example, nominal values, country codes, indications of origin can be derived in a differentiated manner.

Im Hinblick auf automatische Sortierung von Produkten sind Muster, wie sie unter D und E dargestellt sind, besonders günstig, weil sie bei Verdrehung um 90° jeweils gleiche Signale liefern und die Auswertung entsprechend aufgeklebter Wertdokumente, Label oder Briefmarken erleichtern. Geeignet sind besonders sternförmig ausgebildete Muster, die gegenüber noch kleineren Winkelverdrehungen invariant sind.With regard to the automatic sorting of products, patterns as shown under D and E are particularly favorable, since they provide the same signals when rotated by 90 ° and facilitate the evaluation according to glued-on value documents, labels or stamps. Particularly suitable are star-shaped patterns, which are invariant with respect to even smaller angular distortions.

Die Figur 3 zeigt weitere Ausführungsformen für gedruckte Motive (obere Reihe) sowie die zugehörigen Lumineszenz-Rohsignale. Rotationssymmetrische Muster in Form von Kreisringen, die auch aus mehreren konzentrischen Ringen mit unterschiedlicher Breite und Abständen bestehen können, sind gegenüber beliebigen Drehungen des Wertdokuments invariant und erhöhen die Auswertesicherheit damit erheblich.The FIG. 3 shows further embodiments for printed motifs (top row) and the associated luminescence raw signals. Rotationally symmetric patterns in the form of circular rings, which can also consist of several concentric rings with different widths and spacings, are invariant with respect to any rotations of the value document and thus considerably increase the evaluation reliability.

In der Figur 4 ist eine spezielle Ausführungsform dargestellt. Das Merkmal (oberes Quadrat) ist in Form eines Strichcodes aufgebracht. Da gemäß vorliegender Erfindung die Ortsauflösung von der Frequenz der Anregungspulse bestimmt wird, kann die Strichbreite so ausgeführt sein, dass dünne Striche nicht mehr aufgelöst werden. Im unteren Bild ist zu sehen, dass das Lumineszenz-Rohsignal den dünnen Strich des Musters nicht mehr wiedergibt. Es kann somit auf diese Weise redundante Nicht-Information hinterlegt werden.In the FIG. 4 a special embodiment is shown. The feature (upper square) is applied in the form of a bar code. Since according to the present invention, the spatial resolution is determined by the frequency of the excitation pulses, the stroke width can be designed so that thin lines are no longer resolved. In the lower picture you can see that the luminescence raw signal no longer reflects the thin line of the pattern. It can thus be deposited in this way redundant non-information.

In Figur 5 ist ein Blockschaltbild für eine mögliche Auswertelogik dargestellt. Aus dem mit einer bestimmten Pulsfrequenz erzeugten Lumineszenz-Rohsignal werden nach entsprechender Filterung Wellenlänge und Intensitätsprofil, bspw. in Form einer Zeitkonstante überprüft. Je nach Übereinstimmung dieser Parameter mit vorgegebenen Werten wird eine Echt/Unecht-Aussage abgegeben. In Kombination mit dieser Auswertung wird zusätzlich das geometrische Muster, bspw. in Form eines aufgedruckten Strichcodes, extrahiert und die darin enthaltene Information decodiert. Auf diese Weise können bspw. der Nominalwert, eine Länderkennung, der Hersteller oder ein anderes Charakteristikum des Wertdokuments ausgelesen werden.In FIG. 5 a block diagram for a possible evaluation logic is shown. From the luminescence raw signal generated with a specific pulse frequency, the wavelength and intensity profile, for example in the form of a time constant, are checked after appropriate filtering. Depending on the agreement of these parameters with given values, a true / false statement is issued. In combination with this evaluation, the geometric pattern, for example in the form of a printed bar code, is additionally extracted and the information contained therein is decoded. In this way, for example, the nominal value, a country code, the manufacturer or another characteristic of the value document can be read out.

Claims (18)

  1. Method for detecting the authenticity of security features on valuable and/or security documents, wherein
    a) at least one security element is applied on or introduced into the valuable and/or security document, and the security element is incorporated in a geometric pattern,
    b) the valuable and/or security document is optically scanned in a stripe-type manner,
    c) the security feature is excited, using periodically pulsed electromagnetic radiation, to emit radiation from which luminescence raw signals are obtained, wherein the scanning frequency is chosen such that fine pixels up to the range of a few µm are resolved,
    d) the scanned geometric pattern is extracted from the spatially resolved intensity profile of the luminescence raw signals, and the information coded therein, in particular the nominal value of the valuable and/or security document, is output,
    e) wherein the luminescence raw signal is examined with respect to wavelength and also intensity profile, in particular the time constant, and
    f) thereafter an authentic/non-authentic statement is made.
  2. Method according to Claim 1, wherein the security feature is a phosphor, in particular an anti-Stokes phosphor.
  3. Method according to Claim 1 or 2, wherein the valuable and/or security document is a banknote, identity card, label, sticker or ticket, in particular a printed product, in particular a postage stamp.
  4. Method according to Claim 3, wherein the valuable and/or security document is applied on a carrier, in particular on a large or maxi-sized letter.
  5. Method according to one of Claims 1 to 4, wherein the geometric pattern is configured in the form of a barcode.
  6. Method according to one of Claims 1 to 4, wherein the geometric pattern is configured such that it is invariant against a rotation about 90° and 180°.
  7. Method according to one of Claims 1 to 4, wherein the geometric pattern, in the shape of a star, is invariant against small-angle rotation or is rotation-symmetric.
  8. Method according to one of Claims 1 to 7, wherein the scanning is effected in line-type manner with a scanning line that extends over the valuable and/or security document.
  9. Method according to one of Claims 1 to 8, wherein the information coded in the pattern reproduces the nominal value of the valuable and/or security document and/or contains the country code thereof.
  10. Apparatus for detecting the authenticity of security features on valuable and/or security documents, wherein
    a) at least one security element is applied on or introduced into the valuable and/or security document, and the security element is incorporated in a geometric pattern,
    b) having a scanning system with which the valuable and/or security document is able to be optically scanned in a stripe-type manner,
    c) having a device for exciting the security feature of the valuable and/or security document with periodically pulsed electromagnetic radiation in order to obtain luminescence raw signals from the security feature, wherein the scanning frequency is chosen such that fine pixels up to the range of a few µm are resolved,
    d) having a device for extracting the scanned geometric pattern from the spatially resolved intensity profile of the luminescence raw signals and for outputting the information coded in the pattern, in particular the nominal value of the valuable and/or security document,
    e) having an examination device with which the luminescence raw signal is examined with respect to wavelength and intensity profile, in particular time constant, and
    f) having an output device for outputting an authentic/non-authentic statement and for outputting the information coded in the geometric pattern.
  11. Apparatus according to Claim 10, wherein a device for detecting the emission emitted by a phosphor, in particular an anti-Stokes phosphor, is provided.
  12. Apparatus according to Claim 10 or 11, wherein the valuable and/or security document is a banknote, identity card, label, sticker or ticket, in particular a printed product, in particular a postage stamp.
  13. Apparatus according to Claim 12, wherein the valuable and/or security document is applied on a carrier, in particular on a large or maxi-sized letter.
  14. Apparatus according to one of Claims 10 to 13, wherein a reading device for a barcode forming the geometric pattern is provided.
  15. Apparatus according to one of Claims 10 to 14, wherein a line-type scanning device generating a scanning line is provided.
  16. Apparatus according to one of Claims 10 to 15, wherein an output device for the nominal value and/or the country code of the valuable and/or security document is provided.
  17. Apparatus according to one of Claims 10 to 16, having a decoding device for the geometric pattern, in particular the barcode, extracted from the luminescence raw signal.
  18. Apparatus according to Claim 17, wherein the information coded in the geometric pattern, in particular the barcode, reproduces the nominal value and/or the country code of the valuable and/or security document.
EP05734323.8A 2004-05-10 2005-04-22 Method and device for recognising the authenticity of security characteristics on valuable documents and/or security documents Active EP1747539B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004022995A DE102004022995A1 (en) 2004-05-10 2004-05-10 Method and device for authentication of security features on value and / or security documents
PCT/EP2005/004362 WO2005114595A1 (en) 2004-05-10 2005-04-22 Method and device for recognising the authenticity of security characteristics on valuable documents and/or security documents

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EP1747539A1 EP1747539A1 (en) 2007-01-31
EP1747539B1 true EP1747539B1 (en) 2017-08-30

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Publication number Priority date Publication date Assignee Title
DE102006017764A1 (en) * 2006-04-12 2007-10-18 Bundesdruckerei Gmbh Security and / or value document
DE102007058679A1 (en) 2007-11-05 2009-05-07 Siemens Ag Value document, in particular postage stamp, with security element
EP2055500A3 (en) 2007-11-05 2011-04-27 Siemens Aktiengesellschaft Forgery protected valuable document and method for checking it
EP2579218A1 (en) * 2011-10-04 2013-04-10 Deutsche Post AG Stamps

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Publication number Priority date Publication date Assignee Title
SE399602B (en) * 1974-10-25 1978-02-20 Id Kort Ab IDENTITY, COMPETENCE OR CONTROL ACTION
DE2553811C3 (en) * 1975-11-29 1979-10-04 Rudolf 7210 Rottweil Hopt Machine-readable data carrier and device for checking the same
DE3741179A1 (en) * 1987-12-04 1989-06-15 Gao Ges Automation Org DOCUMENT WITH FALSE-PROOF SURFACE RELIEF AND METHOD FOR PRODUCING THE SAME
US6802992B1 (en) 1997-03-05 2004-10-12 Wieczoreck Juergen Non-green anti-stokes luminescent substance
FR2791791B1 (en) * 1999-03-31 2005-05-20 Philippe Andre Havis BAR CODE
ES2312314T5 (en) 2000-05-16 2017-07-18 Sicpa Holding Sa Method, device and security system, all to authenticate a dial
DE10113268B4 (en) * 2001-03-16 2021-06-24 Bundesdruckerei Gmbh Sensor for the authentication of security features on value and / or security documents
DE10212734B4 (en) * 2002-03-21 2022-06-02 Accu-Sort Systems, Inc. Method and device for identifying and authenticating an object

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EP1747539A1 (en) 2007-01-31
DE102004022995A1 (en) 2005-12-08

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