WO2005034049A1 - Feuille authentifiable par spectroscopie proche infrarouge et methode d'authentification - Google Patents
Feuille authentifiable par spectroscopie proche infrarouge et methode d'authentification Download PDFInfo
- Publication number
- WO2005034049A1 WO2005034049A1 PCT/FR2004/002460 FR2004002460W WO2005034049A1 WO 2005034049 A1 WO2005034049 A1 WO 2005034049A1 FR 2004002460 W FR2004002460 W FR 2004002460W WO 2005034049 A1 WO2005034049 A1 WO 2005034049A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sheet
- near infrared
- nir
- zone
- area
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000004497 NIR spectroscopy Methods 0.000 title claims abstract description 16
- 230000005855 radiation Effects 0.000 claims abstract description 14
- 238000009826 distribution Methods 0.000 claims description 23
- 238000004458 analytical method Methods 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 9
- 150000001875 compounds Chemical class 0.000 claims description 7
- 239000003550 marker Substances 0.000 claims description 7
- 230000003595 spectral effect Effects 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 7
- 239000000835 fiber Substances 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 5
- 238000004611 spectroscopical analysis Methods 0.000 claims description 5
- 238000001228 spectrum Methods 0.000 claims description 5
- 239000005995 Aluminium silicate Substances 0.000 claims description 4
- 229920000742 Cotton Polymers 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 238000010521 absorption reaction Methods 0.000 claims description 4
- 235000012211 aluminium silicate Nutrition 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 4
- 239000000454 talc Substances 0.000 claims description 4
- 229910052623 talc Inorganic materials 0.000 claims description 4
- 239000000049 pigment Substances 0.000 claims description 3
- 150000004649 carbonic acid derivatives Chemical class 0.000 claims description 2
- 239000000945 filler Substances 0.000 claims description 2
- 238000002329 infrared spectrum Methods 0.000 claims description 2
- 239000002985 plastic film Substances 0.000 claims description 2
- 229920006255 plastic film Polymers 0.000 claims description 2
- 229920000098 polyolefin Polymers 0.000 claims description 2
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- 229920002994 synthetic fiber Polymers 0.000 claims description 2
- 239000012209 synthetic fiber Substances 0.000 claims description 2
- 229920005613 synthetic organic polymer Polymers 0.000 claims description 2
- 238000012512 characterization method Methods 0.000 description 3
- 230000001419 dependent effect Effects 0.000 description 3
- 230000004071 biological effect Effects 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 239000000976 ink Substances 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 238000005033 Fourier transform infrared spectroscopy Methods 0.000 description 1
- 238000004566 IR spectroscopy Methods 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 238000003854 Surface Print Methods 0.000 description 1
- 238000000862 absorption spectrum Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000012569 chemometric method Methods 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 239000002361 compost Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000004049 embossing Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 230000036512 infertility Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical class [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 235000011160 magnesium carbonates Nutrition 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012764 mineral filler Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000002304 perfume Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
Definitions
- the invention relates to a sheet which can be authenticated by near infrared spectroscopy and the method for authenticating said sheet.
- security documents such as means of payment, identity documents, security elements, now well known, giving authentication characteristics to the document have been introduced into and / or on these documents. These characteristics are often linked to specific physical, chemical or biological properties, which can be revealed by an adequate detection system.
- security elements are for example pigments, fibers, planchettes, security threads, foils or patches applied by transfer, surface prints or varnishes, films affixable on the document.
- These elements include, intrinsically or via materials which are introduced therein in mass and / or on the surface, particular properties such as magnetic, electrical, absorption of electromagnetic waves, luminescence (fluorescence, phosphorescence in UV, visible, InfraRed), resonance properties in microwaves or radio frequencies, biological properties notably based on DNA or properties originating from chemicals or chemical reactions.
- Most often valuable documents have a watermarked area that allows their authentication.
- the classic watermarks in the papers are made on embossed fabrics which make it possible to deposit fibers constituted the paper in variable quantities depending on whether the embossing is a hollow or a bump; areas of paper with fiber pins appear dark while areas with less fiber appear light when viewing paper in transmitted light.
- New watermarks made using a mask frame having less thickness variations on one face of the sheet have been described in patent EP 1122360. Watermarks can represent a barcode that serves as additional document authentication.
- counterfeiters can more or less imitate the visual appearance of watermarks (conventional) by application of transparentizing ink or opacifying gray inks or by collage on paper.
- the watermark is identified by recognition of its image by X-rays.
- the watermark is identified by infrared spectroscopy by analysis of the light zones of reduced surface mass and of the dark zones of higher surface mass, in transmission through the document, the response being dependent on the mass crossed. It is therefore necessary to resolve the drawbacks mentioned and to increase the security of documents as well as that of their authentication method.
- a product which is a polymer, a textile or a paper and which comprises a compound known as an NIR marker which has a large absorption band in the near infrared (most often called according to its symbol in English. "NIR" meaning Near Inffa Red) such that it can be recognized spectroscopically in the NIR absorption spectrum of the product.
- the marker can be a mineral filler chosen by kaolin, talc, basic magnesium carbonates or their mixtures.
- This patent also describes the associated authentication method, in particular for banknotes. This characterization is simply based on the presence or not of the NIR marker.
- the Applicant offers a sheet which has specific characteristics identifiable in the near infrared but impossible to find without knowing in advance the data to be sought .
- Near infrared radiation is between 4,000 and 12,000 cm “1 , or approximately between 800 and 2500 nm. Abso ⁇ tions of near infrared radiation by the chemical bonds of compounds are due to harmonic vibrations and vibrations of combinations. It makes it possible to determine the presence of one or more compounds at one or more typical wavelengths.
- the analysis of the near infrared radiation absorbed by the sheet to be characterized can be done by transmission through the sample in relation to its mass data or by reflection, in particular by diffuse reflection, in relation to its surface data or by analysis simultaneous by transmission and by reflection, called transreflection. It makes it possible to make specific quantitative or qualitative characterizations despite the complexity of the spectra, the characteristic peaks being masked by other interfering peaks, an adequate calibration of the spectrophotometer is necessary. Chemometric methods are applied to develop the calibration. Calibration is therefore based on sophisticated procedures requiring the choice of the most appropriate chemometric processing of the acquired spectral data according to the nature of the product analyzed and of the component sensitive to NIR.
- the chemometric concepts used are very often the analysis in principal components (PCA), the regression of the principal components (PCR), the least partial canes (PLS).
- PCA principal components
- PCR regression of the principal components
- PLS least partial canes
- the chemometric processing is preferably directly integrated into the spectrum acquisition software. Calibration is difficult to perform and requires specific work from well-referenced samples with different well-known quantities of the sensitive component and the measurements being made at well-chosen wavelengths. Calibration can be based on the entire spectrum instead of being at one or more given wavelengths using multivariable statistics.
- Fourier transfused near infrared spectroscopy FT-NIR
- the invention thus provides a sheet identifiable by near infrared spectroscopy comprising at least one NIR component sensitive to radiation. in the near infrared, qualifiable and / or quantifiable in near infrared spectroscopy according to a specific calibration.
- the NIR component is identified for example by its ratio to another component possibly also sensitive to the near infrared or by its distribution in the sheet but without its particular quantity having been determined in the sheet.
- the sheet comprises said NIR component in predetermined quantity (s), said NIR component being a marker having specific absorption properties in the near infrared.
- the sheet comprises at least two different NIR components sensitive to near infrared radiation, said components being present in respective quantities and in a ratio such that their respective spectroscopic properties in the near infrared are hidden within the spectrum of said sheet obtained by near infrared spectroscopy, said components being qualifiable and / or quantifiable according to said calibration, in particular by their respective quantities and / or ratio and / or respective or relative distributions.
- said NIR components sensitive to near infrared radiation are chosen from the usual pigment fillers used in cellulosic or syntlietic papers, preferably from the oxides of silica, in particular talc or kaolin, carbonates are their mixtures.
- the sheet according to the invention is a fibrous sheet based on cotton and / or cellulosic and / or synthetic fibers, in particular a sheet of paper obtained by the wet method and in particular on a round paper machine.
- the sheet according to the invention can also be a non-fibrous sheet or plastic film, in particular based on polyolefin (s), in particular such as the sheets based on polypropylene marketed by the company PRIPLAK or the films based on polyethylene covered with 'a pigmented print-write layer sold by the company ARJOBEX.
- the sheet according to the invention is characterized in that at least one of said NIR components is integrated at least partially into said sheet, in particular said component is integrated in bulk with the base compounds of said sheet.
- said NIR component is fixed by chemical bond to a base compound of said sheet.
- said NIR component is fixed by chemical (covalent) bond to cotton fibers.
- at least one of said NIR components is placed in and / or on a so-called security element, such as a wire, a board, a fiber, and said element is at least partially integrated into the sheet.
- variable distribution zone within which at least one NIR component sensitive to the near infrared, in particular having a specific abso ⁇ tion in the near infrared, is distributed in a variable manner, the characterization by NIR spectroscopy therefore taking place in this zone.
- Said so-called variable distribution zone is a zone presenting local variations in mass distribution of the NIR component (s), it may be a zone of variable thickness and / or variable surface mass (weight per unit area) and / or of variable density.
- said variable distribution zone is a watermarked zone or an zone linked to the non-uniformity of the formation of the sheet.
- a sheet in particular a fibrous sheet such as a sheet of paper
- the distribution of the ingredients which compose it is not perfectly uniform. Consequently, the sheet obtained has mass distribution characteristics of its ingredients.
- a sheet of paper we observe in transmitted light, with the naked eye or with an optical device in the visible, a more or less cloudy appearance which corresponds to the air.
- it is generally sought to have the most melted air possible, and in general a sheet of the most uniform composition possible in mass there still remains a certain inhomogeneity which can advantageously constitute the imprint of the sheet and be exploited for its authentication.
- variable distribution area is in the form of a code.
- said code is in the form of a frame alternating a zone of reduced thickness and zone of thickness greater than or equal to the thickness of the rest of the sheet, it is in particular a watermark code-ba ⁇ e.
- the invention also relates to a security document made from a sheet as described above, in particular a bank note.
- the invention also relates to a method of authenticating a sheet as described above comprising at least one sensitive NIR compost in the near infrared, preferably at least two NIR components, method according to which: - at least one zone of said sheet comprising said NIR component (s) to radiation emitted in the near infrared, - the spectral data thus acquired are recorded, - said NIR component (s) are qualified and / or quantified by analysis of the near infrared spectrum thus obtained according to a specific calibration kept secret and rigorously pre-established from measurements carried out for sheets comprising said NIR component or, where appropriate, different mixtures of said NIR components perfectly defined by their quantities and ratios, - we compare the data resulting from the spectroscopic analysis, thus determined, with the original data stored in a database, - we validate the authenticity of said sheet if the data resulting from l analysis are equal to the original data.
- the measurements are acquired and analyzed by Fourier transform infrared spectroscopy.
- NIR spectral data is acquired by transmission, reflection or transreflection.
- the authentication method is used for a sheet comprising a so-called variable distribution area as described above, said area subjected to near infrared radiation being this said area.
- the NIR spectral data are acquired and analyzed by transmission or by transreflection.
- the method according to the invention is such that, using suitable software, the spectroscopic image in the near infrared of said variable distribution area is reconstructed from the data resulting from the spectroscopic analysis.
- said variable distribution area is a watermarked area, in particular a barcode watermark.
- said variable distribution zone is an zone linked to the non-uniformity of the formation of the sheet, said zone being identified corresponding to the entire sheet.
- said watermarked area can also be analyzed by spectroscopy in the middle infrared in transmission through said watermark. This method is applied to the authentication of security documents comprising said sheet.
- This authentication method targets more particularly sheets or documents comprising a watermarked zone, zone in which is present at least one NIR marker having a very specific abso ⁇ tion in the near infrared, this marker has a variable mass repetition because the watermark is made of zones of variable thicknesses, the dark zones are denser than the light zones, and thus gives a response acquired by transmission dependent on the mass in this zone and therefore characteristic of the sheet or of the document.
- this sheet and this method can be applied not only to the authentication of security or valuable documents (banknotes, checks, etc.) but also to sheets for works of art such as drawings, sheets for watercolors, for the recognition of sheets used for example as a label or for the packaging in particular of a perfume or a medicine; it can also be applied to authenticate a support intended for a particular use requiring specific characteristics of cleanliness and sterility such as sheets used in the medical field for packaging surgical instruments (syringes, scissors ...) or in the hospital field to carry out, for example, operating fields, etc.
- the authentication method therefore more generally applies to articles to be authenticated like works of art or to be secured, in particular to articles comprising a sheet according to the invention having an authentication watermark.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Inspection Of Paper Currency And Valuable Securities (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Credit Cards Or The Like (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/573,645 US20070108386A1 (en) | 2003-09-29 | 2004-09-29 | Sheet which can be authenticated by means of near infrared spectroscopy and authentication method |
EP04787479A EP1671280A1 (fr) | 2003-09-29 | 2004-09-29 | Feuille authentifiable par spectroscopie proche infrarouge et methode d'authentification |
CA002540086A CA2540086A1 (fr) | 2003-09-29 | 2004-09-29 | Feuille authentifiable par spectroscopie proche infrarouge et methode d'authentification |
BRPI0414830-4A BRPI0414830A (pt) | 2003-09-29 | 2004-09-29 | folha autenticável por espectroscopia infravermelha próxima e método de autenticação |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0311383 | 2003-09-29 | ||
FR0311383A FR2860325B1 (fr) | 2003-09-29 | 2003-09-29 | Feuille authentifiable par spectroscopie proche infrarouge et methode d'authentification |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005034049A1 true WO2005034049A1 (fr) | 2005-04-14 |
Family
ID=34307239
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2004/002460 WO2005034049A1 (fr) | 2003-09-29 | 2004-09-29 | Feuille authentifiable par spectroscopie proche infrarouge et methode d'authentification |
Country Status (6)
Country | Link |
---|---|
US (1) | US20070108386A1 (fr) |
EP (1) | EP1671280A1 (fr) |
BR (1) | BRPI0414830A (fr) |
CA (1) | CA2540086A1 (fr) |
FR (1) | FR2860325B1 (fr) |
WO (1) | WO2005034049A1 (fr) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008015459A3 (fr) * | 2006-08-03 | 2008-08-14 | Iti Scotland Ltd | Support de données authentifié |
US8376409B2 (en) | 2006-10-12 | 2013-02-19 | Arjowiggins Security | Security sheet comprising a fibrous substrate |
WO2015136431A1 (fr) | 2014-03-13 | 2015-09-17 | Arjowiggins Security | Document de securite et particules synthetiques |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2948216B1 (fr) * | 2009-07-17 | 2011-11-25 | Arjowiggins Security | Element de securite a effet de parallaxe |
DE102010041975A1 (de) * | 2010-10-05 | 2012-04-05 | Bundesdruckerei Gmbh | Verfahren zum Erfassen eines Wert- und/oder Sicherheitsdokuments |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4451521A (en) * | 1980-05-30 | 1984-05-29 | Gao Gesellschaft Fur Automation Und Organisation Mbh | Security paper with authenticity features in the form of substances luminescing only in the invisible region of the optical spectrum and process for testing the same |
US5757001A (en) * | 1996-05-01 | 1998-05-26 | The Regents Of The University Of Calif. | Detection of counterfeit currency |
DE10005835A1 (de) * | 2000-02-10 | 2001-08-16 | Bundesdruckerei Gmbh | Automatische Authentifikation von mit Sicherheitsmerkmalen geschützten Dokumenten |
WO2002028954A1 (fr) * | 2000-10-05 | 2002-04-11 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Materiau contenant du plastique, du verre, des textiles, ou du papier, portant un marqueur en proche infrarouge, et procede d'identification de ce materiau |
WO2002035213A1 (fr) * | 2000-10-26 | 2002-05-02 | Imerys Minerals Limited | Traitement de materiaux particulaires inorganiques |
EP1276079A1 (fr) * | 2001-07-11 | 2003-01-15 | Banque De France | Procédé d'authentification d'un document de sécurité par analyse multifréquence, et dispositif associé |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE9401718L (sv) * | 1994-05-18 | 1995-11-19 | Eka Nobel Ab | Sätt att bestämma parametrarna i papper |
-
2003
- 2003-09-29 FR FR0311383A patent/FR2860325B1/fr not_active Expired - Fee Related
-
2004
- 2004-09-29 EP EP04787479A patent/EP1671280A1/fr not_active Withdrawn
- 2004-09-29 WO PCT/FR2004/002460 patent/WO2005034049A1/fr not_active Application Discontinuation
- 2004-09-29 CA CA002540086A patent/CA2540086A1/fr not_active Abandoned
- 2004-09-29 US US10/573,645 patent/US20070108386A1/en not_active Abandoned
- 2004-09-29 BR BRPI0414830-4A patent/BRPI0414830A/pt not_active IP Right Cessation
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4451521A (en) * | 1980-05-30 | 1984-05-29 | Gao Gesellschaft Fur Automation Und Organisation Mbh | Security paper with authenticity features in the form of substances luminescing only in the invisible region of the optical spectrum and process for testing the same |
US5757001A (en) * | 1996-05-01 | 1998-05-26 | The Regents Of The University Of Calif. | Detection of counterfeit currency |
DE10005835A1 (de) * | 2000-02-10 | 2001-08-16 | Bundesdruckerei Gmbh | Automatische Authentifikation von mit Sicherheitsmerkmalen geschützten Dokumenten |
WO2002028954A1 (fr) * | 2000-10-05 | 2002-04-11 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Materiau contenant du plastique, du verre, des textiles, ou du papier, portant un marqueur en proche infrarouge, et procede d'identification de ce materiau |
WO2002035213A1 (fr) * | 2000-10-26 | 2002-05-02 | Imerys Minerals Limited | Traitement de materiaux particulaires inorganiques |
EP1276079A1 (fr) * | 2001-07-11 | 2003-01-15 | Banque De France | Procédé d'authentification d'un document de sécurité par analyse multifréquence, et dispositif associé |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008015459A3 (fr) * | 2006-08-03 | 2008-08-14 | Iti Scotland Ltd | Support de données authentifié |
US8308060B2 (en) | 2006-08-03 | 2012-11-13 | Iti Scotland, Ltd. | Data carrier authentication using alternative security features |
US8376409B2 (en) | 2006-10-12 | 2013-02-19 | Arjowiggins Security | Security sheet comprising a fibrous substrate |
WO2015136431A1 (fr) | 2014-03-13 | 2015-09-17 | Arjowiggins Security | Document de securite et particules synthetiques |
Also Published As
Publication number | Publication date |
---|---|
US20070108386A1 (en) | 2007-05-17 |
EP1671280A1 (fr) | 2006-06-21 |
FR2860325B1 (fr) | 2006-01-13 |
CA2540086A1 (fr) | 2005-04-14 |
BRPI0414830A (pt) | 2006-11-14 |
FR2860325A1 (fr) | 2005-04-01 |
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