EP1273461A2 - Ensemble de documents de sécurité avec une filigrane sous forme d'une code à barres - Google Patents

Ensemble de documents de sécurité avec une filigrane sous forme d'une code à barres Download PDF

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Publication number
EP1273461A2
EP1273461A2 EP02077268A EP02077268A EP1273461A2 EP 1273461 A2 EP1273461 A2 EP 1273461A2 EP 02077268 A EP02077268 A EP 02077268A EP 02077268 A EP02077268 A EP 02077268A EP 1273461 A2 EP1273461 A2 EP 1273461A2
Authority
EP
European Patent Office
Prior art keywords
bar code
watermark
series
security
security documents
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.)
Withdrawn
Application number
EP02077268A
Other languages
German (de)
English (en)
Other versions
EP1273461A3 (fr
Inventor
Henricus Anthonius Maria De Heij
Thomas Buitelaar
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
De Nederlandsche Bank NV
Original Assignee
De Nederlandsche Bank NV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by De Nederlandsche Bank NV filed Critical De Nederlandsche Bank NV
Publication of EP1273461A2 publication Critical patent/EP1273461A2/fr
Publication of EP1273461A3 publication Critical patent/EP1273461A3/fr
Withdrawn legal-status Critical Current

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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
    • B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
    • B42D25/29—Securities; Bank notes

Definitions

  • the invention relates to a series of security documents, preferably bank notes, comprising several denominations each representing a different value, provided with a watermark in the form of a bar code.
  • the watermark is combined with a printed characteristic it is designed relatively large, to meet production tolerances.
  • the invention provides a series of security documents, preferably bank notes, comprising several denominations each representing a different value, provided with a watermark in the form of a bar code, the bars for each denomination being at another angle to an axis.
  • the invention relates to a series of security documents, the axis being formed by the longitudinal axis of the bar code, or a series of security documents, the axis being formed by a side of the security document. In this way the angle can easily be checked. It is of course also possible to arrange a special watermark on the security document or to use a characteristic that is already present for defining the axis.
  • the bars are substantially parallel one to the other.
  • the angle can be easily and unambiguously checked by a user.
  • the bars can also be grouped, the bars within a group being parallel to one another.
  • the brightness variation along the longitudinal axis at least partially deviates from a sinusoidal course.
  • a brightness variation that is simple to realise and arrange is substantially sinusoidal.
  • the brightness variation along the longitudinal axis is saw tooth-shaped, triangular, block-shaped, pulse-shaped, or a combination thereof.
  • the intensity variation can for instance also be adapted per denomination or per year.
  • a part of the bars can also have an intensity or brightness variation according to a first periodical function and another part according to another periodical function. Such an additional security level can generally only be seen by an expert.
  • Another additional security possibility is a brightness variation along the longitudinal axis that changes periodically, the period not being constant.
  • the period or frequency may for a part of the bars take a first value, and for a second part a second value.
  • the frequency may also linearly increase or decrease, or another function is possible.
  • Such variations may be arranged such that they can easily and unambiguously be noticed. However it is possible to arrange this and the aforementioned extra security possibilities such that they can only be noticed mechanically or by means of image analysis.
  • a possibility that is visually simple to distinguish is the period along the longitudinal axis taking at least two constant values, or being different for each denomination.
  • the invention relates to a security document provided with a watermark in the form of a bar code, the brightness variation of the bars along the longitudinal axis of the bar code at least partially deviating from a sinusoidal course.
  • a security document provided with a watermark in the form of a bar code, the brightness variation of the bars along the longitudinal axis of the bar code at least partially deviating from a sinusoidal course.
  • a result that can be visually noticed, is among others created when the brightness variation of the bars along the longitudinal axis is saw tooth-shaped, triangular, block-shaped, pulse-shaped, or a combination thereof.
  • variation in the brightness variation several aspects can be changed. For instance the value of a denomination can be changed, but also a relation with a production year, the serial number, the country (in case of Euros) or another characteristic that may or may not be visually present.
  • the invention relates to a security document provided with a watermark in the form of a bar code, the period of the brightness variation of the bars along the longitudinal axis of the bar code not being constant. This was discussed above in combination with the angle, but may, just like the wave form, also serve as extra characteristic, in the same manner as the wave form. Additionally at least two groups of bars can be formed, the bars within a group being parallel to one another.
  • the invention relates to a security document provided with a watermark in the form of a bar code, the bars being parallel to one another and being at an angle that is different from 90° to the lower edge of the watermark, and with a visual indication, the angle being distinctive for the visual indication.
  • the invention relates to a device for detecting and reading a watermark, provided with at least two recording elements, two recording elements being sensitive in different wavelength ranges in the infrared range. More in general a device for detecting a security characteristic, provided with at least two recording elements, two recording elements being sensitive in different wavelength ranges in the infrared range.
  • the device is provided with a first detector, sensitive in the near infrared, and a second detector, sensitive in the infrared range having a wavelength larger than the wavelength in which the first detector is sensitive.
  • the first detector is sensitive in a wavelength range of approximately 900 to 1200 nm and a second detector being sensitive in a wavelength range of approximately 1500 to 1900 nm. From experiments and research it has namely appeared that it is hard to let the forgery resemble the original in those two ranges.
  • the device further comprises a third detector, sensitive in a wavelength range of over 2500 nm, particularly round about 3000 nm.
  • the first detector is a diode array.
  • a background level can be established, dimensions can be taken and checked, and other characteristics mentioned above can be detected.
  • the invention relates to a device as described, suitable for either detecting or reading out a watermark in the form of a bar code as described above.
  • the invention regards a security document apparently belonging to the series of security documents as described.
  • Figure 1 shows an example of a watermark in the form of a bar code 1.
  • the bars 2 have been arranged at a regular distance from each other, and the bars are at an angle ⁇ to the lower edge 3 of the watermark, which here runs parallel to the longitudinal axis of the watermark, the angle being different from 90°.
  • the angle for instance is 70°.
  • the angle can be varied from approximately 45-135 degrees.
  • the intensity or brightness variation along the longitudinal axis looks like as shown and here is sinusoidal.
  • the bar code may for instance be parallel to a side of a security document, but not necessarily so.
  • the lower side or lower edge 3 of the bar code is straight and parallel to the longitudinal axis or main axis of the watermark in the form of a bar code.
  • a watermark in the form of a bar code 1 is shown.
  • the angle ⁇ of the bars 2 to the lower edge 3 of the watermark is 110°.
  • the intensity or brightness variation seen in cross-section 4 is triangular.
  • the frequency of the bars from left to right becomes lower.
  • two periods or frequencies occur, and a more or less direct transition from the one value to the other value.
  • the period may take a first value, and some periods later a second value, and yet some periods later again a third value. Said transition can be sudden, or fluent.
  • the wave form can also change gradually, for instance from sinusoidal to triangular. It is of course also possible that the wave form, the period or the angle of the bars is characterising for the denomination. If so desired, those variations can also be combined.
  • the size of the bar code is, as is the bar code of figure 1, approximately 30 mm x 8 mm.
  • the (groups of) bars can be more or less equidistant, but the distance one to the other or the width of each bar may also vary, as is usual in bar codes.
  • the detector For that matter detection or reading out of the bar code usually takes place in the infrared range.
  • a detector provided with an array of photo diodes or a suitable CCD element is used to that end.
  • the detector has a recording element, for instance an array of photo diodes or the CCD, positioned behind a slit between the recording element and the security document with watermark, that is guided past the slit.
  • the slit is here substantially perpendicularly oriented with respect to the direction of displacement of the security document.
  • the slit is wider than the bar code so that variations in the path and the bar code itself can be taken.
  • the recording element when used as mentioned, it is possible to determine a reference level from the ranges adjacent to the bar code when the projection of the recording element on the security document is wider than the bar code. Because the reference level can be established, the watermark in the form of a bar code can also be arranged under a different characteristic with infrared influencing properties.
  • the security characteristics can also be developed by means of automated methods and a security document can also be designed in an automated manner by means of computer simulations.
  • various security characteristics can be arranged on a security document in an electronic manner, and the result can be shown on a display screen. It can also be calculated whether the characteristics can be noticed by means of detection equipment.
  • the ageing of a security document can also be simulated, for instance by superposing the artificially produced bar code image with the image, taken from actually circulated and aged bank notes.
  • the software can in this way simulate a security document provided with security characteristics.
  • the software can simulate the detection of the security characteristics. In this way it is possible to develop a bar code and detector in an early stage that are well adjusted to each other, also for recognising circulated and dirty security documents provided with a watermark in the form of a bar code.
  • the results can be shown on a display device, for instance a display screen.

Landscapes

  • Business, Economics & Management (AREA)
  • Accounting & Taxation (AREA)
  • Finance (AREA)
  • Editing Of Facsimile Originals (AREA)
  • Inspection Of Paper Currency And Valuable Securities (AREA)
  • Character Input (AREA)
EP02077268A 2001-07-06 2002-06-12 Ensemble de documents de sécurité avec une filigrane sous forme d'une code à barres Withdrawn EP1273461A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1018485 2001-07-06
NL1018485A NL1018485C2 (nl) 2001-07-06 2001-07-06 Serie waardedocumenten voorzien van een watermerk in de vorm van een streepjescode.

Publications (2)

Publication Number Publication Date
EP1273461A2 true EP1273461A2 (fr) 2003-01-08
EP1273461A3 EP1273461A3 (fr) 2003-03-05

Family

ID=19773685

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02077268A Withdrawn EP1273461A3 (fr) 2001-07-06 2002-06-12 Ensemble de documents de sécurité avec une filigrane sous forme d'une code à barres

Country Status (2)

Country Link
EP (1) EP1273461A3 (fr)
NL (1) NL1018485C2 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1025258C2 (nl) * 2004-01-15 2005-07-18 Nl Bank Nv Waardedocument voorzien van een watermerk.
WO2006016112A1 (fr) * 2004-08-13 2006-02-16 Ingenia Technology Limited Procedes, produits et instruments de verification d'authenticite
GB2437939A (en) * 2006-05-08 2007-11-14 Rue De Int Ltd Security substrates incorporating a watermark
WO2011015295A3 (fr) * 2009-08-07 2011-07-21 Giesecke & Devrient Gmbh Papier de sûreté comportant un filigrane
US8699088B2 (en) 2004-03-12 2014-04-15 Ingenia Holdings Limited Methods and apparatuses for creating authenticatable printed articles and subsequently verifying them
US8892556B2 (en) 2009-11-10 2014-11-18 Ingenia Holdings Limited Optimisation
US9818249B1 (en) 2002-09-04 2017-11-14 Copilot Ventures Fund Iii Llc Authentication method and system
CN108449527A (zh) * 2018-03-28 2018-08-24 南京吉印信息科技有限公司 一种用于遥感图像抗屏摄攻击的数字水印方法及系统

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BRPI0508631A (pt) 2004-03-12 2007-08-07 Ingenia Technology Ltd aparelho para determinar uma assinatura de um artigo arranjado em um volume de leitura, uso do aparelho, métodos para identificar um artigo feito de papel ou papelão, um artigo feito de plástico, um produto pela sua embalagem, um documento, um item de vestuário ou calçado, e um disco, método para etiquetar um artigo, e, artigo etiquetado
GB2417592B (en) 2004-08-13 2006-07-26 Ingenia Technology Ltd Authenticity verification of articles
EP1908027B1 (fr) 2005-07-27 2010-09-29 Ingenia Holdings Limited Procédé de vérification d authenticité
EP2175396A3 (fr) 2005-12-23 2010-08-11 Ingenia Holdings (UK) Limited Authentification optique
GB2466311B (en) 2008-12-19 2010-11-03 Ingenia Holdings Self-calibration of a matching algorithm for determining authenticity

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0509916A1 (fr) 1991-04-18 1992-10-21 Banque De France Document fiduciaire ou de sécurité présentant un graphisme imprimé et des signes de sécurité
WO2000045344A1 (fr) 1999-01-26 2000-08-03 The Governor And Company Of The Bank Of England Substrats pour impression

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0509916A1 (fr) 1991-04-18 1992-10-21 Banque De France Document fiduciaire ou de sécurité présentant un graphisme imprimé et des signes de sécurité
WO2000045344A1 (fr) 1999-01-26 2000-08-03 The Governor And Company Of The Bank Of England Substrats pour impression

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9818249B1 (en) 2002-09-04 2017-11-14 Copilot Ventures Fund Iii Llc Authentication method and system
EP1555139A1 (fr) 2004-01-15 2005-07-20 De Nederlandsche Bank N.V. Document de securité avec filigrane
NL1025258C2 (nl) * 2004-01-15 2005-07-18 Nl Bank Nv Waardedocument voorzien van een watermerk.
US8699088B2 (en) 2004-03-12 2014-04-15 Ingenia Holdings Limited Methods and apparatuses for creating authenticatable printed articles and subsequently verifying them
CN101031927B (zh) * 2004-08-13 2012-05-30 英根亚控股有限公司 真实性验证方法、产品和设备
WO2006016112A1 (fr) * 2004-08-13 2006-02-16 Ingenia Technology Limited Procedes, produits et instruments de verification d'authenticite
GB2437939A (en) * 2006-05-08 2007-11-14 Rue De Int Ltd Security substrates incorporating a watermark
US8221586B2 (en) 2006-05-08 2012-07-17 De La Rue International Limited Security substrate comprising watermark
CN101437693B (zh) * 2006-05-08 2010-11-03 德拉鲁国际公司 含有水印的安全基片和安全文件
GB2437939B (en) * 2006-05-08 2008-03-26 Rue De Int Ltd Improvements in security substrates
WO2011015295A3 (fr) * 2009-08-07 2011-07-21 Giesecke & Devrient Gmbh Papier de sûreté comportant un filigrane
US8892556B2 (en) 2009-11-10 2014-11-18 Ingenia Holdings Limited Optimisation
CN108449527A (zh) * 2018-03-28 2018-08-24 南京吉印信息科技有限公司 一种用于遥感图像抗屏摄攻击的数字水印方法及系统
CN108449527B (zh) * 2018-03-28 2019-06-18 南京吉印信息科技有限公司 一种用于遥感图像抗屏摄攻击的数字水印方法及系统

Also Published As

Publication number Publication date
NL1018485C2 (nl) 2003-01-08
EP1273461A3 (fr) 2003-03-05

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