EP2042342B1 - Security document, method and device for authenticating such document and method of manufacturing such document - Google Patents

Security document, method and device for authenticating such document and method of manufacturing such document Download PDF

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Publication number
EP2042342B1
EP2042342B1 EP08165254.7A EP08165254A EP2042342B1 EP 2042342 B1 EP2042342 B1 EP 2042342B1 EP 08165254 A EP08165254 A EP 08165254A EP 2042342 B1 EP2042342 B1 EP 2042342B1
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EP
European Patent Office
Prior art keywords
pattern
secure document
ink
document
layers
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.)
Revoked
Application number
EP08165254.7A
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German (de)
French (fr)
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EP2042342A1 (en
Inventor
Denis Guerard
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.)
Idemia France SAS
Original Assignee
Oberthur Technologies SA
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Publication date
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Application filed by Oberthur Technologies SA filed Critical Oberthur Technologies SA
Priority to PL08165254T priority Critical patent/PL2042342T3/en
Publication of EP2042342A1 publication Critical patent/EP2042342A1/en
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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
    • B42D25/40—Manufacture
    • B42D25/45—Associating two or more layers
    • 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
    • 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
    • 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
    • B42D25/40—Manufacture
    • B42D25/475—Cutting cards
    • B42D2035/34—

Definitions

  • the present invention relates to authentication devices and more particularly secure multilayer documents whose layers are immovably sealed as well as methods and devices for securing the authentication of such documents and a method of manufacturing such documents.
  • the secure documents include payment cards, for example debit or credit cards, transport cards, SIM cards (acronym for Subscriber Identity Module in English terminology), identity cards, passports, cards residence permit, driving license or vehicle registration certificate.
  • payment cards for example debit or credit cards, transport cards, SIM cards (acronym for Subscriber Identity Module in English terminology), identity cards, passports, cards residence permit, driving license or vehicle registration certificate.
  • the patent application DE 197 35 293 describes an authentication device for valuable products.
  • An authentication element is used in combination with a luminescent element to authenticate the product regardless of lighting conditions.
  • the luminescent element mounted on a support, is arranged under the authentication element so that, when the luminescent element is activated, the authentication element can be observed.
  • the luminescent element may in particular be activated by an electric field.
  • the patent application WO 2006/084686 discloses a multilayer device comprising diffraction structures and a method of manufacturing such a device using in particular photosensitive materials.
  • This device may include authentication elements such as holograms.
  • the patent application WO 03/095228 describes an optical device adapted in particular to the authentication of banknotes and credit cards.
  • the optical device is adapted to produce color variations by means of interference according to the viewing angle,
  • the authentication device comprises several layers of paper or plastic, one of the layers comprising thermochromic pigments and one of the layers comprising an oscillation circuit.
  • the pigments change color due to the heat dissipated by the resistance of the oscillation circuit. An identification mark is thus made visible.
  • the identification mark can be printed behind a thermochromic layer that is opaque in the absence of heat but becomes transparent when heated, thus making the mark printed identification.
  • the temperature-sensitive ink can also be hidden behind a print layer or security hologram, which prevents any manipulation. The hologram or print layer to be removed at the time of certification in front of the customer.
  • thermochromic pigments are placed on an inner layer of the secure document, it is necessary for the authentication elements to be visible under normal conditions, for example in the light of day and at a temperature of between 15 ° C. C and 25 ° C, to use transparent materials. Such a constraint limits the number of possible applications, many documents being made from opaque materials. Moreover, if the thermochromic pigments are placed on an outer layer of the secure document, the secure document can be falsified.
  • the invention solves at least one of the problems discussed above.
  • the subject of the invention is thus a secure document comprising a plurality of superimposed and irremovably sealed layers, forming two substantially parallel outer faces, one of said layers having on an internal face a pattern made at least partially with an ink whose characteristics vary. with the physical conditions in which at least a portion of said secure document is located, the secure document further comprising at least one opaque zone formed between said pattern and one of said two outer faces, said opaque zone at least partially masking said pattern.
  • the invention thus makes it possible to insert into a secure document an identification mark protected from any fraudulent alteration or modification.
  • the identification mark inserted in the secure document is undetectable by a person uninformed of the existence of this mark.
  • a fraudster not knowing the existence of this brand identification can only produce false secure documents, identifiable by informed people, because they do not have this identification mark.
  • the secure document is for example a microcircuit card. Its thickness may be substantially equal to 0.76mm. It can comply with ISO 7816. At least one of the layers can be made of plastic. The thickness of a layer comprising at least a portion of the opaque zone is, for example, between 100 and 350 ⁇ m.
  • Said ink is advantageously a thermochromatic, photochromatic, electrochromatic or piezochromatic ink whose properties are known.
  • said ink comprises at least two states related to the physical conditions in which at least a portion of said secure document is located, one of said at least two states allowing said pattern to be viewed through said at least one an opaque zone, said one of said at least two states being preferably a state in which said ink is colored.
  • the invention thus makes it possible to authenticate a secure document as described above.
  • the method further advantageously comprises a step of implementing an artificial light source for generating said intense light.
  • a second pattern different from said pattern called first pattern, is formed on an inner face, said second pattern being at least partially aligned with said first pattern and said at least one opaque zone formed between said pattern and one of said two faces external.
  • two authentication patterns are used, the first pattern being further used to at least partially mask the second pattern.
  • said ink comprises at least two states related to the physical conditions in which at least a portion of said secure document is located, one of said at least two states permitting the display of said second pattern through said at least one opaque zone.
  • said one of said at least two states being preferably a state in which said ink is translucent.
  • the assembly of the layers can be achieved by rolling.
  • the invention thus makes it possible to authenticate a secure document as described above.
  • the method further advantageously comprises a step of implementing an artificial light source for generating said intense light.
  • the figure 1 illustrates a secure document 100 adapted to implement the invention.
  • the secure document 100 here comprises a microcircuit whose connectors 105 are visible and a set of patterns 110, also called a visual, determined by the customer.
  • the secure document 100 has for example a thickness of about 0.76mm.
  • This card can in particular be in conformity with the ISO 7816 standard with regard to its dimensions.
  • the secure document 100 is preferably a personal document.
  • the secure document 100 advantageously comprises a set of sheets of paper and / or plastic assembled in layers and sealed, for example, by gluing and / or lamination, cold and / or hot, irremovably.
  • the layers can also be deposited on each other by processes such as molding.
  • the term "assembly" denotes here all the methods making it possible to juxtapose at least two layers.
  • the invention can be implemented in only part of the secure document.
  • a secure paper document comprises several pages
  • the invention may be implemented in the cover or on a particular page.
  • the secure document 100 may be, in particular, a payment card, for example debit or credit type, a transport card, a SIM card.
  • the secure document 100 may also be an official document, such as an identity card, a passport, a residence permit, a driving license or a registration card.
  • the card 100 comprises security means integrated in the body of the card to make the manufacture of false secure documents particularly difficult and to easily detect the fraudulently manufactured secure documents.
  • the figure 2 illustrates a first example of implementation of the invention in a secure document.
  • the figure 2 is a partial view, in perspective, secure document 200, illustrating the layers forming this document before they are assembled and sealed.
  • the secure document 200 here comprises five layers forming the body of the document.
  • the layers 205 and 210 are outer layers of protection, also called upper layers or overlay in English terminology. These layers are advantageously transparent and typically have a thickness of between approximately 30 and 50 ⁇ m.
  • the layers 205 and 210 may comprise particular patterns. Such patterns are advantageously printed after the manufacture of the card.
  • Layers 215 and 220 are the layers used as a support for the visual. These layers typically have a thickness of between 100 and 350 ⁇ m.
  • the layers 215 and 220 are here opaque so that it is not possible to observe or distinguish patterns that would be reproduced between these layers under normal lighting conditions. Normal lighting conditions are defined here as natural or artificial lighting conditions that do not use particular optical instruments. Patterns are preferably printed on the outer faces of the layers 215 and 220. These patterns, forming the visual, are visible through the layers 205 and 210. Furthermore, the opacity of the layers 215 and 220 can be realized according to patterns. particular, obtained for example by printing, the opaque layers 215 and 220 are then partially opaque.
  • the opaque layers 215 and 220 may be layers made of paper or a standard plastic, commonly used in the manufacture of the identification card. These layers may be made, for example, of PVC (acronym of PolyVinyl Chloride in English terminology), polyethylene terephthalate (PETG or PETF) or ABS / PVC (Acrylonitrile Butadiene Styrene).
  • PVC polyvinym of PolyVinyl Chloride in English terminology
  • PETF polyethylene terephthalate
  • ABS / PVC Acrylonitrile Butadiene Styrene
  • the companies Galazzi, Klockner, INEOS and Dupont manufacture such sheets of plastic, for example white
  • the companies Bayer and PPG manufacture the PC (acronym of Polycarbonate) and the Teslin (Teslin is a brand ), also called synthetic paper, respectively.
  • the layer 225 is an inner layer used here as a support for a graphic element 230 enabling the authentication of the secure document 200.
  • the authentication graphic element 230 may be deposited, for example printed, on one of the internal faces. layers 215 and 220.
  • the layer 225 is then not necessary to implement the invention.
  • the secure document 200 here comprises five layers, the invention can be implemented with a higher or lower number of layers.
  • the authentication graphic element 230 is hidden between the opaque layers 215 and 220 so that it is visible only with the aid of an intense light source, preferably a point source, by reflection or, advantageously, by transparency.
  • an intense light source preferably a point source
  • the authentication graphic element 230 is printed using an ink whose internal structure changes when it is exposed to physical variations of its environment.
  • the ink constituting the authentication graphic element 230 may be a thermochromic ink that changes color when it is heated, a photochromic ink that changes color when exposed to ultraviolet (UV) light, an electrochromic ink that changes color when subjected to an electric field or a piezochromic ink that changes color according to the pressure to which it is subjected.
  • the ink constituting the graphic authentication element 230 is colored when it is in a normal environment for using the secure document 200.
  • a normal environment of use is, for example, a temperature. 0 ° C to 35 ° C.
  • the secure document is subjected to particular constraints, for example a temperature greater than 40 ° C., the ink constituting the graphic element 230 becomes transparent
  • the authentication graphic element 230 is not visible.
  • the secure document 200 is observed, at least partially, with the aid of intense light, preferably punctual, by reflection or, advantageously, by transparency, the authentication graphic element 230 is visible.
  • the authentication graphic element 230 disappears when it is heated.
  • the heat source can be the source of intense light itself or a separate source.
  • the figure 3 including Figures 3a, 3b and 3c , illustrates the observation that can be made of the secure document 200 presented on the figure 2 .
  • the figure 3a represents a view of the secure document 200 under normal lighting conditions and in a normal environment of use.
  • the figure 3a therefore represents the secure document 200 as it can be viewed by a user.
  • a visual 300 is printed on the secure document.
  • the visual is for example printed on an outer face of the opaque layers (references 215 and 220 on the figure 2 ) and visible through the overlay (references 205 and 210 on the figure 2 ).
  • the normal lighting conditions are, for example, natural or artificial lighting not using optical instruments and a normal environment of use is, for example, a temperature between 0 ° C and 35 ° C .
  • the opaque layers conceal the authentication graphical element 230.
  • the figure 3b represents a view of the secure document 200, illuminated with intense light and punctual, seen by transparency, in a normal environment of use.
  • the intense and punctual light is obtained, for example, using a device such as a Flexilux light source from Schölly (Flexilux is a trademark). As illustrated, the intense and punctual light makes it possible to reveal the graphic authentication element 230.
  • the figure 3c represents a view of the secure document 200, illuminated with the aid of an intense and punctual light, seen by transparency, in a particular environment of use, for example an environment in which wherein the secure document 200 is at least partially heated to a temperature above 40 ° C. Heat can be generated by the intense light source or other source. Under these conditions, the ink used to print the authentication graphic element 230 becomes transparent and, consequently, the authentication graphic element 230 is no longer visible.
  • the figure 4 illustrates an example of a method that can be used to manufacture the secure document illustrated on the figures 2 and 3 .
  • a step 400 is intended to print a client visual, that is to say a pattern determined by a customer to decorate his secure documents, on the outer face of one or both opaque layers. This pattern corresponds to pattern 300 of the figure 3 .
  • a step 405 is intended to print the authentication graphics used to authenticate the secure document.
  • This ground corresponds to the 230 motif of figures 2 and 3 .
  • the printing of the authentication graphic elements is performed on one of the inner layers.
  • An inner layer is here an inner face of the opaque layers or, more generally, a face of a layer between the opaque layers.
  • the graphic authentication elements are printed here using an ink whose characteristics vary with the physical conditions in which the identification card is located, for example a thermochromic ink.
  • the steps 410 and 415 make it possible to assemble and seal the layers constituting the body of the secure document, that is to say the layers 205, 210, 215, 220 and 225 illustrated on FIG. figure 2 for example by rolling.
  • Such an assembly can be made in two phases.
  • a first phase consists for example of a hot cycle, lasting from 5 to 30 minutes with a temperature of between 50 and 200 ° C. and a pressure of between 50 and 200 N / cm 2 .
  • a second phase consists, for example, of a cold cycle, of a duration of 5 to 30 minutes with a temperature of between 0 and 100 ° C. and a pressure of between 50 and 300 N / cm 2 .
  • the secured documents are then cut into the desired format (step 420). It is then possible to add options to the secured documents thus made (step 425). Such options reside for example in adding holograms or in customization. The reason 300 of the figure 3 can be achieved during this step.
  • the figure 5 illustrates a second example of implementation of the invention in the secure document 500.
  • the figure 5 is a partial view, in perspective, of a secure document illustrating the layers forming this secure document.
  • the identification card 500 here comprises five layers.
  • Layers 505 and 510 are the outer layers of protection, preferably transparent, which may comprise particular patterns drawn.
  • Layers 515 and 520 are the layers used as a support for the visual.
  • the layers 515 and 520 are here opaque so that it is not possible, under normal lighting conditions, that is to say without the aid of particular optical devices, to observe patterns which would be reproduced between these layers. Patterns are advantageously printed on the outer faces of the layers 515 and 520. Furthermore, the opacity of the layers 515 and 520 can be made according to particular patterns, the opaque layers 515 and 520 are then partially opaque.
  • the opaque layers 515 and 520 are layers that can be made from paper or from standard plastics, commonly used in the manufacture of the identification card. These layers can be made, for example, of PVC, polyethylene terephthalate (PETG or PETF) or ABS / PVC.
  • the layer 525 is an inner layer used here as a support for a graphic element enabling authentication of the secure document 500.
  • the authentication graphic element can be deposited, for example printed, on one of the internal faces of the layers. 515 and 520.
  • the layer 525 is then not necessary to implement the invention.
  • the secure document 500 here comprises five layers, the invention can be implemented with a higher or lower number of layers.
  • an authentication graphic element 540 is hidden between two ink films 530 and 535 whose internal structure changes when it is exposed to physical variations of its environment.
  • this ink may be a thermochromic ink, a photochromic ink, an electrochromic ink or a piezochromic ink.
  • 530 and 535 ink films are preferably located between the opaque layers 515 and 520 and is advantageously a predetermined and identifiable pattern.
  • the authentication graphic element 540 is hidden between the opaque layers 215 and 220 and between the ink films 530 and 535 so that it is visible only by reflection or, advantageously, by transparency, to the using an intense light source, preferably punctual, under certain conditions.
  • the ink of the films 530 and 535 is opaque when it is in a normal environment of use of the secure document 500, for example when the temperature is between 0 ° C. and 35 ° C., and becomes transparent when it is subject to particular constraints, for example when the temperature is greater than 40 ° C to reveal, by reflection or, advantageously, by transparency, the authentication graphic element 540.
  • the ink used by the films 530 and 535 is, for example, the UV ink "35" 75020 from the company PETREL or the ink 3Z7U538 from the company SICPA. These inks are deposited by screen printing. They are black at room temperature and become clear from 35 ° C and 38 ° C, respectively.
  • the authentication graphics element 540 can be printed using standard ink or using an ink whose internal structure changes when exposed to physical variations in its environment.
  • films 530 and 535 may use an ink that is transparent only under certain temperature conditions
  • the authentication graphics element 540 may use an ink that is opaque only under certain electrical conditions. It is then necessary to submit the secure document, or at least a part thereof at a predetermined temperature and electrical environment to view, by transparency, the authentication graphic element 540.
  • the figure 6 including Figures 6a, 6b and 6c , illustrates the observation that can be made of secure document 500, presented on the figure 5 , when the lighting conditions and the environment of use change.
  • the figure 6a represents a view of the secure document 500 under normal lighting conditions and in a normal environment of use.
  • the figure 6a therefore represents the secure document 500 as it can be viewed by a user.
  • a visual 600 is printed on the secure document 500.
  • the visual is for example printed on an outer face of the opaque layers (references 515 and 520 on the figure 5 ) and visible through the overlay (references 505 and 510 on the figure 5 ).
  • the normal lighting conditions are, for example, natural or artificial lighting that does not use particular optical instruments and a normal environment of use is, for example, a temperature between 0 ° C and 35 ° vs.
  • the opaque layers conceal the authentication graphic element 540 and the patterns formed by the films 530 and 540.
  • the figure 6b represents a view of the secure document 500, illuminated with intense light and punctual, seen by transparency, in a normal environment of use.
  • the intense and punctual light is obtained, for example, using a device such as a Flexilux light source from Schölly.
  • the intense and punctual light reveals the patterns formed by the films 530 and 535, here the logo "OCS".
  • the authentication graphic element 540 concealed between the films 530 and 535, is not visible.
  • the Figure 6c illustrates a view of the secure document 500, illuminated with the aid of an intense and punctual light, seen by transparency, in a particular environment of use, for example, in the case of a thermochromic ink, an environment in which the secure document, or a part thereof, is brought to a temperature above 40 ° C, that is to say an environment to make the ink 530 films and 535 transparent.
  • the heat can be generated by the light source itself or by another source. Under these conditions, the ink used to form the films 530 and 535 becomes transparent. It is thus possible to display and / or identify the authentication graphic element 540.
  • the combination of opaque layers, ink films whose characteristics vary with the physical conditions in which the secure document is located, or at least a portion thereof, and graphic authentication elements printed or not printed at using an ink whose characteristics vary with the physical conditions in which the secure document is located, or at least a part thereof makes it possible to reinforce the security level of the secured documents.
  • the graphic authentication elements are invisible in normal condition, they can be observed only by reflection or, advantageously, by transparency using an intense light, preferably punctual.
  • the hidden authentication graphics elements are only revealed in particular conditions, for example if the secure document, or a part thereof, is heated. This security is very difficult to violate because it is necessary to delaminate the secure document without damaging it and without damaging the graphic authentication elements.
  • the ink used to form the film 530 may be different from the ink used to form the film 535 to impose a strong stress on the environment to make these inks transparent simultaneously.
  • the invention can also be implemented with only one of the two films 530 and 535.
  • the figure 7 illustrates an example device 700 for authenticating a secure document as described above, that is to say to check the presence of an authentication graphic element in the thickness of the secure document.
  • the device 700 comprises a document support 705 itself comprising a transparent or recessed area 710 making it possible to observe, by transparency, a document placed on the support 705.
  • a cavity of the device 700 comprises lighting means 715, these lighting means 715 being situated opposite the support 705 with respect to the point from which a user observes a secure document placed in the support 705.
  • the illumination means 715 make it possible to produce intense light directed towards the transparent zone 710 or, more precisely, on the location of the transparent zone 710 where a graphic authentication element must be observed.
  • opaque walls 720 make it possible to isolate the lighting means 715 in such a way that the user of the device 700 is not dazzled when he observes a document secured by transparency.
  • the device 700 comprises means 725 for modifying the structure of the ink used in the analyzed security document.
  • the nature of these means depends on the type of ink used in the analyzed document analyzed. It may be, for example, heating means.
  • the device 700 has a controller 730 for controlling the means 725 to choose, for example, the temperature to which is to be carried a secure document, or a part thereof, inserted in the support 705.
  • the device 700 can integrate several types of means 725 each of which can be independently controlled by a suitable controller 730, so that the device 700 can be used for different types of ink or to determine an environment in which several parameters must be controlled simultaneously.
  • the ink is screen printed which allows a deposit of sufficient thickness to get the desired effect.
  • the printing is here performed on one side of an inner layer of the secure document.
  • the ink may be UV or hot-air drying. Any type of graphic element such as text, drawings, logos and numbers can be printed. A wide range of colors can be used.
  • Printing with an ink whose characteristics vary with the physical conditions in which the secure document is located can be combined with conventional printing so that only a part of the patterns appears and disappears with the changes in the physical environment of the secure document .
  • the printed patterns for authentication which do not represent personal information, are advantageously identical for a batch of secure documents.
  • the personalization step is preferably performed later when the secure document is assembled.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Business, Economics & Management (AREA)
  • Accounting & Taxation (AREA)
  • Finance (AREA)
  • Credit Cards Or The Like (AREA)
  • Printing Methods (AREA)

Description

La présente invention concerne les dispositifs d'authentification et plus particulièrement les documents sécurisés multicouches dont les couches sont scellées de façon inamovible ainsi que des procédés et des dispositifs pour sécuriser l'authentification de tels documents ainsi qu'un procédé de fabrication de tels documents.The present invention relates to authentication devices and more particularly secure multilayer documents whose layers are immovably sealed as well as methods and devices for securing the authentication of such documents and a method of manufacturing such documents.

Alors que les documents sécurisés tels que les titres de transport et les cartes d'identité, en papier ou en matière plastique, comprenant ou non un microcircuit, sont couramment utilisés pour de nombreuses applications, il existe un besoin d'identification et/ou d'authentification permettant par exemple d'identifier un motif caché ou un élément graphique d'authentification pour vérifier que ceux-ci n'ont pas été fabriqués frauduleusement.While secure documents such as transport tickets and identity cards, made of paper or plastic, whether or not including a microcircuit, are commonly used for many applications, there is a need for identification and / or authentication for example to identify a hidden pattern or an authentication graphic element to verify that they were not manufactured fraudulently.

Les documents sécurisés sont notamment les cartes de paiement, par exemple de type débit ou crédit, les cartes de transport, les cartes SIM (acronyme de Subscriber Identity Module en terminologie anglo-saxonne), les cartes d'identité, les passeports, les cartes de séjour, les permis de conduire ou les carte grises pour véhicule.The secure documents include payment cards, for example debit or credit cards, transport cards, SIM cards (acronym for Subscriber Identity Module in English terminology), identity cards, passports, cards residence permit, driving license or vehicle registration certificate.

La demande de brevet DE 197 35 293 décrit un dispositif d'authentification pour produits de valeur. Un élément d'authentification est utilisé en combinaison avec un élément luminescent pour permettre d'authentifier le produit quelles que soit les conditions d'éclairage. L'élément luminescent, monté sur un support, est disposé sous l'élément d'authentification de telle sorte que, lorsque l'élément luminescent est activé, l'élément d'authentification puisse être observé. L'élément luminescent peut notamment être activé par un champ électrique.The patent application DE 197 35 293 describes an authentication device for valuable products. An authentication element is used in combination with a luminescent element to authenticate the product regardless of lighting conditions. The luminescent element, mounted on a support, is arranged under the authentication element so that, when the luminescent element is activated, the authentication element can be observed. The luminescent element may in particular be activated by an electric field.

La demande de brevet WO 2006/084686 divulgue un dispositif multicouche comprenant des structures de diffraction et un procédé de fabrication d'un tel dispositif utilisant notamment des matières photosensibles. Ce dispositif peut comprendre des éléments d'authentification tels que des hologrammes.The patent application WO 2006/084686 discloses a multilayer device comprising diffraction structures and a method of manufacturing such a device using in particular photosensitive materials. This device may include authentication elements such as holograms.

La demande de brevet WO 03/095228 décrit un dispositif optique adapté notamment à l'authentification de billets de banque et de carte de crédit. Le dispositif optique est adapté à produire des variations de couleurs à l'aide d'interférences selon l'angle de visualisation,The patent application WO 03/095228 describes an optical device adapted in particular to the authentication of banknotes and credit cards. The optical device is adapted to produce color variations by means of interference according to the viewing angle,

La demande de brevet US 2004/0028225 décrit un exemple de dispositif permettant d'authentifier un objet tel qu'une carte plastique d'identification. Selon cette solution, le dispositif d'authentification comporte plusieurs couches de papier ou de plastique, une des couches comportant des pigments thermochromiques et une des couches comportant un circuit d'oscillation. Lorsque le document est placé dans un champ électromagnétique approprié, les pigments changent de couleur en raison de la chaleur dissipée par la résistance du circuit d'oscillation. Une marque d'identification est ainsi rendue visible.The patent application US 2004/0028225 describes an exemplary device for authenticating an object such as a plastic identification card. According to this solution, the authentication device comprises several layers of paper or plastic, one of the layers comprising thermochromic pigments and one of the layers comprising an oscillation circuit. When the document is placed in a suitable electromagnetic field, the pigments change color due to the heat dissipated by the resistance of the oscillation circuit. An identification mark is thus made visible.

Alternativement, la marque d'identification peut être imprimée derrière une couche thermochromique qui est opaque en absence de chaleur mais qui devient transparente lorsqu'elle est chauffée, rendant ainsi la marque d'identification imprimée visible. L'encre réactive à la température peut également être cachée derrière une couche d'impression ou un hologramme de sécurité, ce qui prévient toute manipulation. L'hologramme ou la couche d'impression devant être enlevé au moment de la certification devant le client.Alternatively, the identification mark can be printed behind a thermochromic layer that is opaque in the absence of heat but becomes transparent when heated, thus making the mark printed identification. The temperature-sensitive ink can also be hidden behind a print layer or security hologram, which prevents any manipulation. The hologram or print layer to be removed at the time of certification in front of the customer.

Bien que cette solution soit satisfaisante dans certaines circonstances, elle n'est pas suffisante pour authentifier l'origine de la carte d'identification pour certaines applications. En effet, si les pigments thermochromiques sont placés sur une couche interne du document sécurisé, il est nécessaire, pour que les éléments d'authentification soient visibles dans des conditions normales, par exemple à la lumière du jour et à une température comprise entre 15°C et 25°C, d'utiliser des matériaux transparents. Une telle contrainte limite le nombre d'applications envisageables, de nombreux documents étant réalisés à partir de matériaux opaques. Par ailleurs, si les pigments thermochromiques sont placés sur une couche externe du document sécurisé, le document sécurisé peut être falsifié.Although this solution is satisfactory in certain circumstances, it is not sufficient to authenticate the origin of the identification card for certain applications. Indeed, if the thermochromic pigments are placed on an inner layer of the secure document, it is necessary for the authentication elements to be visible under normal conditions, for example in the light of day and at a temperature of between 15 ° C. C and 25 ° C, to use transparent materials. Such a constraint limits the number of possible applications, many documents being made from opaque materials. Moreover, if the thermochromic pigments are placed on an outer layer of the secure document, the secure document can be falsified.

L'invention permet de résoudre au moins un des problèmes exposés précédemment.The invention solves at least one of the problems discussed above.

L'invention a ainsi pour objet un document sécurisé comportant une pluralité de couches superposées et scellées de façon inamovible, formant deux faces externes sensiblement parallèles, une desdites couches comportant sur une face interne un motif réalisé au moins partiellement avec une encre dont les caractéristiques varient avec les conditions physiques dans lesquelles se trouve au moins une partie dudit document sécurisé, le document sécurisé comprenant en outre au moins une zone opaque formée entre ledit motif et l'une desdites deux faces externes, ladite zone opaque masquant au moins partiellement ledit motif.The subject of the invention is thus a secure document comprising a plurality of superimposed and irremovably sealed layers, forming two substantially parallel outer faces, one of said layers having on an internal face a pattern made at least partially with an ink whose characteristics vary. with the physical conditions in which at least a portion of said secure document is located, the secure document further comprising at least one opaque zone formed between said pattern and one of said two outer faces, said opaque zone at least partially masking said pattern.

L'invention permet ainsi d'insérer dans un document sécurisé une marque d'identification protégée de toute altération ou modification frauduleuse. De plus, la marque d'identification insérée dans le document sécurisé est indétectable par une personne non informée de l'existence de cette marque. Ainsi, un fraudeur ne connaissant pas l'existence de cette marque d'identification ne peut produire que de faux documents sécurisés, identifiables par des personnes informées, car démunies de cette marque d'identification.The invention thus makes it possible to insert into a secure document an identification mark protected from any fraudulent alteration or modification. In addition, the identification mark inserted in the secure document is undetectable by a person uninformed of the existence of this mark. Thus, a fraudster not knowing the existence of this brand identification can only produce false secure documents, identifiable by informed people, because they do not have this identification mark.

Le document sécurisé est par exemple une carte à microcircuit. Son épaisseur peut être sensiblement égale à 0,76mm. Il peut être conforme à la norme ISO 7816. Au moins l'une des couches peut être réalisée en plastique. L'épaisseur d'une couche comprenant au moins une partie de la zone opaque est par exemple comprise entre 100 et 350µm.The secure document is for example a microcircuit card. Its thickness may be substantially equal to 0.76mm. It can comply with ISO 7816. At least one of the layers can be made of plastic. The thickness of a layer comprising at least a portion of the opaque zone is, for example, between 100 and 350 μm.

Ladite encre est avantageusement une encre thermochromatique, photochromatique, électrochromatique ou piézochromatique dont les propriétés sont connues.Said ink is advantageously a thermochromatic, photochromatic, electrochromatic or piezochromatic ink whose properties are known.

Selon un premier mode de réalisation, ladite encre comprend au moins deux états liés aux conditions physiques dans lesquelles se trouve au moins une partie dudit document sécurisé, l'un desdits au moins deux états permettant la visualisation dudit motif au travers de ladite au moins une zone opaque, ledit un desdits au moins deux états étant, de préférence, un état selon lequel ladite encre est colorée. Ainsi, connaissant les conditions selon lesquelles l'encre est visible et invisible, il est possible d'identifier le motif et son état, visible ou non, pour authentifier le document sécurisé.According to a first embodiment, said ink comprises at least two states related to the physical conditions in which at least a portion of said secure document is located, one of said at least two states allowing said pattern to be viewed through said at least one an opaque zone, said one of said at least two states being preferably a state in which said ink is colored. Thus, knowing the conditions under which the ink is visible and invisible, it is possible to identify the pattern and its state, visible or not, to authenticate the secure document.

L'invention a aussi pour objet un procédé de fabrication d'un document sécurisé tel que décrit précédemment, le procédé comprenant les étapes suivantes,

  • impression d'au moins une partie dudit motif avec ladite encre sur une face d'une première couche de ladite pluralité de couches ; et,
  • assemblage de ladite première couche comprenant ledit motif avec au moins une seconde couche, ledit motif étant situé entre lesdites première et seconde couches.
    L'assemblage des couches peut être réalisé par laminage.
    L'invention a aussi pour objet un procédé d'authentification d'un document sécurisé tel que décrit précédemment, le procédé comprenant les étapes suivantes,
  • éclairage d'au moins une partie dudit document sécurisé comprenant au moins une partie dudit motif avec une lumière intense ;
  • visualisation d'au moins une partie dudit motif au travers de ladite au moins une zone opaque ;
  • changement des conditions physiques dans lesquelles se trouve au moins une partie dudit document sécurisé ; et,
  • observation de l'évanescence d'au moins une partie dudit motif.
The invention also relates to a method of manufacturing a secure document as described above, the method comprising the following steps,
  • printing at least a portion of said pattern with said ink on one side of a first layer of said plurality of layers; and,
  • assembling said first layer comprising said pattern with at least a second layer, said pattern being located between said first and second layers.
    The assembly of the layers can be achieved by rolling.
    The invention also relates to a method for authenticating a secure document as described above, the method comprising the following steps,
  • illuminating at least a portion of said secure document comprising at least a portion of said pattern with intense light;
  • viewing at least a portion of said pattern through said at least one opaque area;
  • changing the physical conditions in which at least a portion of said secure document is located; and,
  • observing the evanescence of at least a part of said pattern.

L'invention permet ainsi d'authentifier un document sécurisé tel que décrit précédemment.The invention thus makes it possible to authenticate a secure document as described above.

Le procédé comprend en outre avantageusement une étape de mise en oeuvre d'une source de lumière artificielle pour générer ladite lumière intense.The method further advantageously comprises a step of implementing an artificial light source for generating said intense light.

Alternativement, un second motif, différent dudit motif appelé premier motif, est réalisé sur une face interne, ledit second motif étant au moins partiellement aligné avec ledit premier motif et ladite au moins une zone opaque formée entre ledit motif et l'une desdites deux faces externes. Selon ce mode de réalisation, deux motifs d'authentification sont utilisés, le premier motif étant en outre utilisé pour masquer au moins partiellement le second motif.Alternatively, a second pattern, different from said pattern called first pattern, is formed on an inner face, said second pattern being at least partially aligned with said first pattern and said at least one opaque zone formed between said pattern and one of said two faces external. According to this embodiment, two authentication patterns are used, the first pattern being further used to at least partially mask the second pattern.

De façon avantageuse, ladite encre comprend au moins deux états liés aux conditions physiques dans lesquelles se trouve au moins une partie dudit document sécurisé, l'un desdits au moins deux états permettant la visualisation dudit second motif au travers de ladite au moins une zone opaque, ledit un desdits au moins deux états étant de préférence un état selon lequel ladite encre est translucide. Ainsi, connaissant les conditions selon lesquelles l'encre est visible et invisible, il est possible d'identifier le premier et le second motifs et leur état, visible ou non, pour authentifier le document sécurisé.Advantageously, said ink comprises at least two states related to the physical conditions in which at least a portion of said secure document is located, one of said at least two states permitting the display of said second pattern through said at least one opaque zone. said one of said at least two states being preferably a state in which said ink is translucent. Thus, knowing the conditions under which the ink is visible and invisible, it is possible to identify the first and second patterns and their status, visible or not, to authenticate the secure document.

L'invention a aussi pour objet un procédé de fabrication d'un document sécurisé tel que décrit précédemment, le procédé comprenant les étapes suivantes,

  • impression d'au moins une partie dudit premier motif avec ladite encre sur une face d'une première couche de ladite pluralité de couches ;
  • impression d'au moins une partie dudit second motif sur ladite au moins une partie dudit premier motif ; et,
  • assemblage de ladite couche comprenant ledit premier motif avec au moins une seconde couche, lesdits premier et second motifs étant situés entre lesdites première et seconde couches.
The invention also relates to a method of manufacturing a secure document as described above, the method comprising the following steps,
  • printing at least a portion of said first pattern with said ink on one side of a first layer of said plurality of layers;
  • printing at least a portion of said second pattern on said at least a portion of said first pattern; and,
  • assembling said layer comprising said first pattern with at least a second layer, said first and second patterns being between said first and second layers.

Alternativement, le procédé de fabrication d'un document sécurisé tel que décrit précédemment comprend les étapes suivantes,

  • impression d'au moins une partie dudit premier motif avec ladite encre sur une face d'une première couche de ladite pluralité de couches ;
  • impression d'au moins une partie dudit second motif sur une face d'une seconde couche ; et,
  • assemblage desdites première et seconde couches, lesdits premier et second motifs étant situés entre lesdites première et seconde couches.
Alternatively, the method of manufacturing a secure document as described above comprises the following steps,
  • printing at least a portion of said first pattern with said ink on one side of a first layer of said plurality of layers;
  • printing at least a portion of said second pattern on one side of a second layer; and,
  • assembling said first and second layers, said first and second patterns being between said first and second layers.

L'assemblage des couches peut être réalisé par laminage.The assembly of the layers can be achieved by rolling.

L'invention a aussi pour objet un procédé d'authentification d'un document sécurisé tel que décrit précédemment, le procédé comprenant les étapes suivantes,

  • éclairage d'au moins une partie dudit document sécurisé comprenant au moins une partie dudit premier motif et au moins une partie dudit second motif avec une lumière intense ;
  • visualisation d'au moins une partie dudit premier motif au travers de ladite au moins une zone opaque ;
  • changement des conditions physiques dans lesquelles se trouve au moins une partie dudit document sécurisé ; et,
  • visualisation d'au moins une partie dudit second motif au travers de ladite au moins une zone opaque.
The invention also relates to a method for authenticating a secure document as described above, the method comprising the following steps,
  • illuminating at least a portion of said secure document comprising at least a portion of said first pattern and at least a portion of said second pattern with intense light;
  • viewing at least a portion of said first pattern through said at least one opaque area;
  • changing the physical conditions in which at least a portion of said secure document is located; and,
  • viewing at least a portion of said second pattern through said at least one opaque area.

L'invention permet ainsi d'authentifier un document sécurisé tel que décrit précédemment.The invention thus makes it possible to authenticate a secure document as described above.

Le procédé comprend en outre avantageusement une étape de mise en oeuvre d'une source de lumière artificielle pour générer ladite lumière intense.The method further advantageously comprises a step of implementing an artificial light source for generating said intense light.

L'invention a également pour objet un dispositif pour authentifier un document sécurisé tel que décrit précédemment, le dispositif comprenant les moyens suivants,

  • moyens pour recevoir pour ledit document sécurisé;
  • moyens pour éclairer au moins partiellement ledit document sécurisé lorsque ledit document sécurisé est placé dans lesdits moyens pour recevoir pour ledit document sécurisé;
  • moyens pour modifier l'état de ladite encre dont les caractéristiques varient avec les conditions physiques dans lesquelles se trouve au moins une partie dudit document sécurisé ; et,
  • moyens pour isoler optiquement lesdits moyens d'éclairage.
The invention also relates to a device for authenticating a secure document as described above, the device comprising the following means,
  • means for receiving for said secure document;
  • means for illuminating said secure document at least partially when said secure document is placed in said means for receiving for said secure document;
  • means for changing the state of said ink whose characteristics vary with the physical conditions in which at least a portion of said secure document is located; and,
  • means for optically isolating said lighting means.

D'autres avantages, buts et caractéristiques de la présente invention ressortent de la description détaillée qui suit, faite à titre d'exemple non limitatif, au regard des dessins annexés dans lesquels :

  • la figure 1 représente un document sécurisé adapté à mettre en oeuvre l'invention ;
  • la figure 2 illustre un premier exemple de mise en oeuvre de l'invention dans un document sécurisé ;
  • la figure 3, comprenant les figures 3a, 3b et 3c, illustre l'observation qui peut être réalisée du document sécurisé représenté sur la figure 2 ;
  • la figure 4 illustre un exemple du procédé pouvant être utilisé pour fabriquer le document sécurisé illustré sur les figures 2 et 3 ;
  • la figure 5 illustre un second exemple de mise en oeuvre de l'invention dans un document sécurisé ;
  • la figure 6, comprenant les figures 6a, 6b et 6c, illustre l'observation qui peut être réalisée du document sécurisé représenté sur la figure 5 ; et,
  • la figure 7 illustre un exemple de dispositif pour authentifier un document sécurisé selon l'invention, c'est-à-dire pour vérifier la présence d'un motif particulier dans l'épaisseur du document sécurisé.
Other advantages, aims and features of the present invention will emerge from the detailed description which follows, given by way of non-limiting example, with reference to the accompanying drawings in which:
  • the figure 1 represents a secure document adapted to implement the invention;
  • the figure 2 illustrates a first example of implementation of the invention in a secure document;
  • the figure 3 , including Figures 3a, 3b and 3c , illustrates the observation that can be made of the secure document represented on the figure 2 ;
  • the figure 4 illustrates an example of the method that can be used to make the secure document illustrated on the figures 2 and 3 ;
  • the figure 5 illustrates a second example of implementation of the invention in a secure document;
  • the figure 6 , including Figures 6a, 6b and 6c , illustrates the observation that can be made of the secure document represented on the figure 5 ; and,
  • the figure 7 illustrates an exemplary device for authenticating a secure document according to the invention, that is to say to verify the presence of a particular pattern in the thickness of the secure document.

La figure 1 illustre un document sécurisé 100 adapté à mettre en oeuvre l'invention. Le document sécurisé 100 comprend ici un microcircuit dont les connecteurs 105 sont visibles ainsi qu'un ensemble de motifs dessinés 110, aussi appelé un visuel, déterminé par le client.The figure 1 illustrates a secure document 100 adapted to implement the invention. The secure document 100 here comprises a microcircuit whose connectors 105 are visible and a set of patterns 110, also called a visual, determined by the customer.

Le document sécurisé 100 a par exemple une épaisseur d'environ 0,76mm. Cette carte peut notamment être conforme à la norme ISO 7816 en ce qui concerne ses dimensions.The secure document 100 has for example a thickness of about 0.76mm. This card can in particular be in conformity with the ISO 7816 standard with regard to its dimensions.

Le document sécurisé 100 est de préférence un document personnel.The secure document 100 is preferably a personal document.

Le document sécurisé 100 comprend avantageusement un ensemble de feuilles en papier et/ou en matière plastique assemblées en couches et scellées, par exemple, par collage et/ou lamination, à froid et/ou à chaud, de façon inamovible. Les couches peuvent également être déposées les unes sur les autres par des procédés tels que le moulage. De façon générale, le terme assemblage désigne ici tous les procédés permettant de juxtaposer au moins deux couches.The secure document 100 advantageously comprises a set of sheets of paper and / or plastic assembled in layers and sealed, for example, by gluing and / or lamination, cold and / or hot, irremovably. The layers can also be deposited on each other by processes such as molding. In general terms, the term "assembly" denotes here all the methods making it possible to juxtapose at least two layers.

L'invention peut être mise en oeuvre dans une partie seulement du document sécurisé. Par exemple, lorsqu'un document sécurisé en papier comprend plusieurs pages, l'invention peut être mise en oeuvre dans la couverture ou dans une page particulière.The invention can be implemented in only part of the secure document. For example, when a secure paper document comprises several pages, the invention may be implemented in the cover or on a particular page.

Le document sécurisé 100 peut être, en particulier, une carte de paiement, par exemple de type débit ou crédit, une carte de transport, une carte SIM. Le document sécurisé 100 peut également être un document officiel, tel qu'une carte d'identité, un passeport, une carte de séjour, un permis de conduire ou une carte grise.The secure document 100 may be, in particular, a payment card, for example debit or credit type, a transport card, a SIM card. The secure document 100 may also be an official document, such as an identity card, a passport, a residence permit, a driving license or a registration card.

Selon l'invention la carte 100 comprend des moyens de sécurisation intégrés au corps de la carte pour rendre la fabrication de faux documents sécurisés particulièrement difficile et pour détecter facilement les documents sécurisés frauduleusement fabriqués.According to the invention, the card 100 comprises security means integrated in the body of the card to make the manufacture of false secure documents particularly difficult and to easily detect the fraudulently manufactured secure documents.

La figure 2 illustre un premier exemple de mise en oeuvre de l'invention dans un document sécurisé. La figure 2 est une vue partielle, en perspective, du document sécurisé 200, illustrant les couches formant ce document avant qu'elles ne soient assemblées et scellées.The figure 2 illustrates a first example of implementation of the invention in a secure document. The figure 2 is a partial view, in perspective, secure document 200, illustrating the layers forming this document before they are assembled and sealed.

Le document sécurisé 200 comprend ici cinq couches formant le corps du document.The secure document 200 here comprises five layers forming the body of the document.

Les couches 205 et 210 sont des couches externes de protection, aussi appelées couches supérieures ou overlay en terminologie anglo-saxonne. Ces couches sont avantageusement transparentes et ont typiquement une épaisseur comprise entre environ 30 et 50µm. Les couches 205 et 210 peuvent comprendre des motifs particuliers. De tels motifs sont avantageusement imprimés après la fabrication de la carte.The layers 205 and 210 are outer layers of protection, also called upper layers or overlay in English terminology. These layers are advantageously transparent and typically have a thickness of between approximately 30 and 50 μm. The layers 205 and 210 may comprise particular patterns. Such patterns are advantageously printed after the manufacture of the card.

Les couches 215 et 220 sont les couches utilisées comme support pour le visuel. Ces couches ont typiquement une épaisseur comprise entre 100 et 350um. Les couches 215 et 220 sont ici opaques de telle sorte qu'il n'est pas possible d'observer ni de distinguer des motifs qui seraient reproduits entre ces couches, dans des conditions normales d'éclairage. Des conditions normales d'éclairage sont définies ici comme étant des conditions d'éclairage naturel ou artificiel ne faisant pas appel à des instruments optiques particuliers. Des motifs sont de préférence imprimés sur les faces externes des couches 215 et 220. Ces motifs, formant le visuel, sont visibles à travers les couches 205 et 210. Par ailleurs, l'opacité des couches 215 et 220 peut être réalisée selon des motifs particuliers, obtenus par exemple par impression, les couches opaques 215 et 220 sont alors partiellement opaques.Layers 215 and 220 are the layers used as a support for the visual. These layers typically have a thickness of between 100 and 350 μm. The layers 215 and 220 are here opaque so that it is not possible to observe or distinguish patterns that would be reproduced between these layers under normal lighting conditions. Normal lighting conditions are defined here as natural or artificial lighting conditions that do not use particular optical instruments. Patterns are preferably printed on the outer faces of the layers 215 and 220. These patterns, forming the visual, are visible through the layers 205 and 210. Furthermore, the opacity of the layers 215 and 220 can be realized according to patterns. particular, obtained for example by printing, the opaque layers 215 and 220 are then partially opaque.

Les couches opaques 215 et 220 peuvent être des couches réalisées en papier ou dans un plastique standard, couramment utilisée dans la fabrication de la carte d'identification. Ces couches peuvent être réalisées, par exemple, en PVC (sigle de PolyVinyl Chloride en terminologie anglo-saxonne), en polyéthylène téréphtalate (PETG ou PETF) ou en ABS/PVC (Acrylonitrile Butadiène Styrène). A titre d'illustration, les sociétés Galazzi, Klockner, INEOS et Dupont fabriquent de telles feuilles de plastique, par exemple de couleur blanche, et les sociétés Bayer et PPG fabriquent le PC (sigle de Polycarbonate) et le Teslin (Teslin est une marque), aussi appelé papier synthétique, respectivement.The opaque layers 215 and 220 may be layers made of paper or a standard plastic, commonly used in the manufacture of the identification card. These layers may be made, for example, of PVC (acronym of PolyVinyl Chloride in English terminology), polyethylene terephthalate (PETG or PETF) or ABS / PVC (Acrylonitrile Butadiene Styrene). By way of illustration, the companies Galazzi, Klockner, INEOS and Dupont manufacture such sheets of plastic, for example white, and the companies Bayer and PPG manufacture the PC (acronym of Polycarbonate) and the Teslin (Teslin is a brand ), also called synthetic paper, respectively.

La couche 225 est une couche intérieure utilisée ici comme support pour un élément graphique 230 permettant l'authentification du document sécurisé 200. Alternativement, l'élément graphique d'authentification 230 peut être déposé, par exemple imprimé, sur l'une des faces internes des couches 215 et 220. La couche 225 n'est alors pas nécessaire pour mettre en oeuvre l'invention. Ainsi, bien que le document sécurisé 200 comporte ici cinq couches, l'invention peut être mise en oeuvre avec un nombre de couches supérieur ou inférieur.The layer 225 is an inner layer used here as a support for a graphic element 230 enabling the authentication of the secure document 200. Alternatively, the authentication graphic element 230 may be deposited, for example printed, on one of the internal faces. layers 215 and 220. The layer 225 is then not necessary to implement the invention. Thus, although the secure document 200 here comprises five layers, the invention can be implemented with a higher or lower number of layers.

L'élément graphique d'authentification 230 est caché entre les couches opaques 215 et 220 de telle sorte qu'il n'est visible qu'à l'aide d'une source lumineuse intense, de préférence ponctuelle, par réflexion ou, avantageusement, par transparence.The authentication graphic element 230 is hidden between the opaque layers 215 and 220 so that it is visible only with the aid of an intense light source, preferably a point source, by reflection or, advantageously, by transparency.

De façon avantageuse, l'élément graphique d'authentification 230 est imprimé à l'aide d'une encre dont la structure interne change lorsqu'elle est exposée à des variations physiques de son environnement. Par exemple, l'encre constituant l'élément graphique d'authentification 230 peut être une encre thermochromique qui change de couleur lorsqu'elle est chauffée, une encre photochromique qui change de couleur lorsqu'elle est exposée à des rayons ultraviolets (UV), une encre électrochromique qui change de couleur lorsqu'elle est soumise à un champ électrique ou une encre piézochromique qui change de couleur selon la pression à laquelle elle est soumise.Advantageously, the authentication graphic element 230 is printed using an ink whose internal structure changes when it is exposed to physical variations of its environment. For example, the ink constituting the authentication graphic element 230 may be a thermochromic ink that changes color when it is heated, a photochromic ink that changes color when exposed to ultraviolet (UV) light, an electrochromic ink that changes color when subjected to an electric field or a piezochromic ink that changes color according to the pressure to which it is subjected.

Selon un mode de réalisation particulier, l'encre constituant l'élément graphique d'authentification 230 est colorée lorsqu'elle est dans un environnement normal d'utilisation du document sécurisé 200. Un environnement normal d'utilisation est, par exemple, une température comprise 0°C et 35°C. Lorsque le document sécurisé est soumis à des contraintes particulières, par exemple une température supérieure à 40°C, l'encre constituant l'élément graphique 230 devient transparenteAccording to one particular embodiment, the ink constituting the graphic authentication element 230 is colored when it is in a normal environment for using the secure document 200. A normal environment of use is, for example, a temperature. 0 ° C to 35 ° C. When the secure document is subjected to particular constraints, for example a temperature greater than 40 ° C., the ink constituting the graphic element 230 becomes transparent

Ainsi, lorsque le document sécurisé 200 est observé dans des conditions normales d'éclairage, l'élément graphique d'authentification 230 n'est pas visible. Lorsque le document sécurisé 200 est observé, au moins partiellement, à l'aide d'une lumière intense, de préférence ponctuelle, par réflexion ou, avantageusement, par transparence, l'élément graphique d'authentification 230 est visible. Dans le cas d'une encre thermochromique, l'élément graphique d'authentification 230 disparaît lorsqu'il est chauffé. La source de chaleur peut être la source de lumière intense elle-même ou une source distincte.Thus, when the secure document 200 is observed under normal lighting conditions, the authentication graphic element 230 is not visible. When the secure document 200 is observed, at least partially, with the aid of intense light, preferably punctual, by reflection or, advantageously, by transparency, the authentication graphic element 230 is visible. In the case of a thermochromic ink, the authentication graphic element 230 disappears when it is heated. The heat source can be the source of intense light itself or a separate source.

L'observation de ces trois états permet d'authentifier le document sécurisé.The observation of these three states makes it possible to authenticate the secure document.

La figure 3, comprenant les figures 3a, 3b et 3c, illustre l'observation qui peut être réalisée du document sécurisé 200 présenté sur la figure 2.The figure 3 , including Figures 3a, 3b and 3c , illustrates the observation that can be made of the secure document 200 presented on the figure 2 .

La figure 3a représente une vue du document sécurisé 200 dans des conditions normales d'éclairage et dans un environnement normal d'utilisation. La figure 3a représente donc le document sécurisé 200 tel qu'il peut être visualisé par un utilisateur. Comme illustré, un visuel 300 est imprimé sur le document sécurisé. Le visuel est par exemple imprimé sur une face externe des couches opaques (références 215 et 220 sur la figure 2) et visible à travers l'overlay (références 205 et 210 sur la figure 2).The figure 3a represents a view of the secure document 200 under normal lighting conditions and in a normal environment of use. The figure 3a therefore represents the secure document 200 as it can be viewed by a user. As illustrated, a visual 300 is printed on the secure document. The visual is for example printed on an outer face of the opaque layers (references 215 and 220 on the figure 2 ) and visible through the overlay (references 205 and 210 on the figure 2 ).

A nouveau, les conditions normales d'éclairage sont, par exemple, un éclairage naturel ou artificiel ne faisant pas appel à des instruments optiques et un environnement normal d'utilisation est, par exemple, une température comprise entre 0°C et 35°C.Again, the normal lighting conditions are, for example, natural or artificial lighting not using optical instruments and a normal environment of use is, for example, a temperature between 0 ° C and 35 ° C .

Dans ces conditions, les couches opaques (références 215 et 220 sur la figure 2) dissimulent l'élément graphique d'authentification 230.Under these conditions, the opaque layers (references 215 and 220 on the figure 2 ) conceal the authentication graphical element 230.

La figure 3b représente une vue du document sécurisé 200, éclairé à l'aide d'une lumière intense et ponctuelle, vu par transparence, dans un environnement normal d'utilisation. La lumière intense et ponctuelle est obtenue, par exemple, à l'aide d'un dispositif tel qu'une source lumineuse Flexilux de la société Schölly (Flexilux est une marque). Comme illustré, la lumière intense et ponctuelle permet de révéler l'élément graphique d'authentification 230.The figure 3b represents a view of the secure document 200, illuminated with intense light and punctual, seen by transparency, in a normal environment of use. The intense and punctual light is obtained, for example, using a device such as a Flexilux light source from Schölly (Flexilux is a trademark). As illustrated, the intense and punctual light makes it possible to reveal the graphic authentication element 230.

La figure 3c représente une vue du document sécurisé 200, éclairé à l'aide d'une lumière intense et ponctuelle, vu par transparence, dans un environnement particulier d'utilisation, par exemple un environnement dans lequel le document sécurisé 200 est, au moins partiellement, porté à une température supérieure à 40°C. La chaleur peut être générée par la source de lumière intense ou par une autre source. Dans ces conditions, l'encre utilisée pour imprimer l'élément graphique d'authentification 230 devient transparente et, par conséquent, l'élément graphique d'authentification 230 n'est plus visible.The figure 3c represents a view of the secure document 200, illuminated with the aid of an intense and punctual light, seen by transparency, in a particular environment of use, for example an environment in which wherein the secure document 200 is at least partially heated to a temperature above 40 ° C. Heat can be generated by the intense light source or other source. Under these conditions, the ink used to print the authentication graphic element 230 becomes transparent and, consequently, the authentication graphic element 230 is no longer visible.

La combinaison des couches opaques et des éléments graphiques d'authentification imprimés à l'aide d'une encre dont les caractéristiques varient avec les conditions physiques dans lesquelles se trouve la carte d'identification permet de renforcer le niveau de sécurité des cartes. En effet, bien que les éléments graphiques d'authentification soient visibles dans un environnement normal d'utilisation, ils ne peuvent être observés que par réflexion ou, avantageusement, par transparence à l'aide d'un éclairage artificiel intense. De plus, les éléments graphiques d'authentification dissimulés disparaissent dans des conditions particulières, par exemple si la carte d'identification est chauffée, ajoutant ainsi un niveau de contrôle supplémentaire. Cette sécurité est très difficilement violable car les éléments graphiques d'authentification sont protégés entre deux couches scellées du document sécurisé.The combination of opaque layers and graphic authentication elements printed using an ink whose characteristics vary with the physical conditions in which the identification card is located makes it possible to reinforce the level of security of the cards. Indeed, although the graphic authentication elements are visible in a normal environment of use, they can be observed only by reflection or, advantageously, by transparency using intense artificial lighting. In addition, hidden authentication graphic elements disappear under particular conditions, for example if the identification card is heated, thus adding an additional level of control. This security is very difficult to violate because the graphic authentication elements are protected between two sealed layers of the secure document.

Ainsi, l'authentification d'un document sécurisé tel que le document sécurisé 200, peut comprendre les étapes suivantes,

  • analyse du document sécurisé dans des conditions normales d'éclairage et dans un environnement normal d'utilisation pour déceler une anomalie éventuelle visible ;
  • analyse du document sécurisé à l'aide d'une source lumineuse intense, de préférence ponctuelle, dans un environnement normal d'utilisation, pour identifier, par réflexion ou, avantageusement, par transparence, un élément graphique d'authentification ; et,
  • analyse du document sécurisé à l'aide d'une source lumineuse intense, de préférence ponctuelle, dans un environnement particulier d'utilisation, par exemple à proximité d'une source de chaleur, pour observer la disparition de l'élément graphique d'authentification.
Thus, the authentication of a secure document such as the secure document 200 may include the following steps,
  • analysis of the secure document under normal lighting conditions and in a normal environment of use to detect a possible visible anomaly;
  • analysis of the secure document using an intense light source, preferably punctual, in a normal environment of use, to identify, by reflection or, advantageously, by transparency, a graphic authentication element; and,
  • analysis of the secure document using an intense light source, preferably a point source, in a particular environment of use, for example near a heat source, to observe the disappearance of the graphic authentication element .

La figure 4 illustre un exemple de procédé pouvant être utilisé pour la fabrication du document sécurisé illustré sur les figures 2 et 3.The figure 4 illustrates an example of a method that can be used to manufacture the secure document illustrated on the figures 2 and 3 .

Une étape 400 a pour objet d'imprimer un visuel client, c'est-à-dire un motif déterminé par un client pour décorer ses documents sécurisés, sur la face extérieure de l'une ou des deux couches opaques. Ce motif correspond au motif 300 de la figure 3.A step 400 is intended to print a client visual, that is to say a pattern determined by a customer to decorate his secure documents, on the outer face of one or both opaque layers. This pattern corresponds to pattern 300 of the figure 3 .

Une étape 405 a pour objet d'imprimer les éléments graphiques d'authentification utilisés pour authentifier le document sécurisé. Ce motif correspond au motif 230 des figures 2 et 3. Selon le premier mode de réalisation, l'impression des éléments graphiques d'authentification est réalisée sur une des couches intérieures. Une couche intérieure est ici une face interne des couches opaques ou, plus généralement, une face d'une couche comprise entre les couches opaques. Les éléments graphiques d'authentification sont ici imprimés à l'aide d'une encre dont les caractéristiques varient avec les conditions physiques dans lesquelles se trouve la carte d'identification, par exemple une encre thermochromique.A step 405 is intended to print the authentication graphics used to authenticate the secure document. This ground corresponds to the 230 motif of figures 2 and 3 . According to the first embodiment, the printing of the authentication graphic elements is performed on one of the inner layers. An inner layer is here an inner face of the opaque layers or, more generally, a face of a layer between the opaque layers. The graphic authentication elements are printed here using an ink whose characteristics vary with the physical conditions in which the identification card is located, for example a thermochromic ink.

Les étapes 410 et 415 permettent d'assembler et de sceller les couches constituant le corps du document sécurisé, c'est-à-dire les couches 205, 210, 215, 220 et 225 illustrées sur la figure 2, par exemple par laminage. Un tel assemblage peut être réalisé en deux phases. Une première phase consiste par exemple en un cycle chaud, d'une durée de 5 à 30 minutes avec une température comprise entre 50 et 200°C et une pression comprise entre 50 et 200 N/cm2. Une seconde phase consiste par exemple en un cycle froid, d'une durée de 5 à 30 minutes avec une température comprise entre 0 et 100°C et une pression comprise entre 50 et 300 N/cm2.The steps 410 and 415 make it possible to assemble and seal the layers constituting the body of the secure document, that is to say the layers 205, 210, 215, 220 and 225 illustrated on FIG. figure 2 for example by rolling. Such an assembly can be made in two phases. A first phase consists for example of a hot cycle, lasting from 5 to 30 minutes with a temperature of between 50 and 200 ° C. and a pressure of between 50 and 200 N / cm 2 . A second phase consists, for example, of a cold cycle, of a duration of 5 to 30 minutes with a temperature of between 0 and 100 ° C. and a pressure of between 50 and 300 N / cm 2 .

Les documents sécurisés sont ensuite découpés au format souhaité (étape 420). Il est alors possible d'ajouter des options aux documents sécurisés ainsi réalisés (étape 425). De telles options résident par exemple dans l'ajout d'hologrammes ou dans la personnalisation. Le motif 300 de la figure 3 peut ainsi être réalisé durant cette étape.The secured documents are then cut into the desired format (step 420). It is then possible to add options to the secured documents thus made (step 425). Such options reside for example in adding holograms or in customization. The reason 300 of the figure 3 can be achieved during this step.

La figure 5 illustre un second exemple de mise en oeuvre de l'invention dans le document sécurisé 500. Comme la figure 2, la figure 5 est une vue partielle, en perspective, d'un document sécurisé illustrant les couches formant ce document sécurisé. La carte d'identification 500 comprend ici cinq couches.The figure 5 illustrates a second example of implementation of the invention in the secure document 500. As the figure 2 , the figure 5 is a partial view, in perspective, of a secure document illustrating the layers forming this secure document. The identification card 500 here comprises five layers.

Les couches 505 et 510 sont les couches externes de protection, de préférence transparentes, qui peuvent comprendre des motifs particuliers dessinés.Layers 505 and 510 are the outer layers of protection, preferably transparent, which may comprise particular patterns drawn.

Les couches 515 et 520 sont les couches utilisées comme support pour le visuel. Les couches 515 et 520 sont ici opaques de telle sorte qu'il n'est pas possible, dans des conditions normales d'éclairage, c'est-à-dire sans l'aide de dispositifs optiques particuliers, d'observer des motifs qui seraient reproduits entre ces couches. Des motifs sont avantageusement imprimés sur les faces externes des couches 515 et 520. Par ailleurs, l'opacité des couches 515 et 520 peut être réalisée selon des motifs particuliers, les couches opaques 515 et 520 sont alors partiellement opaques.Layers 515 and 520 are the layers used as a support for the visual. The layers 515 and 520 are here opaque so that it is not possible, under normal lighting conditions, that is to say without the aid of particular optical devices, to observe patterns which would be reproduced between these layers. Patterns are advantageously printed on the outer faces of the layers 515 and 520. Furthermore, the opacity of the layers 515 and 520 can be made according to particular patterns, the opaque layers 515 and 520 are then partially opaque.

A nouveau, les couches opaques 515 et 520 sont des couches pouvant être réalisées en papier ou à partir de plastiques standard, couramment utilisés dans la fabrication de la carte d'identification. Ces couches peuvent être réalisées, par exemple, en PVC, en polyéthylène téréphtalate (PETG ou PETF) ou en ABS/PVC.Again, the opaque layers 515 and 520 are layers that can be made from paper or from standard plastics, commonly used in the manufacture of the identification card. These layers can be made, for example, of PVC, polyethylene terephthalate (PETG or PETF) or ABS / PVC.

La couche 525 est une couche intérieure utilisée ici comme support pour un élément graphique permettant l'authentification du document sécurisé 500. Alternativement, l'élément graphique d'authentification peut être déposé, par exemple imprimé, sur l'une des faces internes des couches 515 et 520. La couche 525 n'est alors pas nécessaire pour mettre en oeuvre l'invention. Ainsi, bien que le document sécurisé 500 comporte ici cinq couches, l'invention peut être mise en oeuvre avec un nombre de couches supérieur ou inférieur.The layer 525 is an inner layer used here as a support for a graphic element enabling authentication of the secure document 500. Alternatively, the authentication graphic element can be deposited, for example printed, on one of the internal faces of the layers. 515 and 520. The layer 525 is then not necessary to implement the invention. Thus, although the secure document 500 here comprises five layers, the invention can be implemented with a higher or lower number of layers.

Selon le mode de réalisation présenté sur la figure 5, un élément graphique d'authentification 540, ici un coeur, est caché entre deux films d'encre 530 et 535 dont la structure interne change lorsqu'elle est exposée à des variations physiques de son environnement. Par exemple, cette encre peut être une encre thermochromique, une encre photochromique, une encre électrochromique ou une encre piézochromique. Les films d'encre 530 et 535 sont de préférence situés entre les couches opaques 515 et 520 et représente, avantageusement, un motif prédéterminé et identifiable.According to the embodiment presented on the figure 5 , an authentication graphic element 540, here a core, is hidden between two ink films 530 and 535 whose internal structure changes when it is exposed to physical variations of its environment. For example, this ink may be a thermochromic ink, a photochromic ink, an electrochromic ink or a piezochromic ink. 530 and 535 ink films are preferably located between the opaque layers 515 and 520 and is advantageously a predetermined and identifiable pattern.

L'élément graphique d'authentification 540 est caché entre les couches opaques 215 et 220 et entre les films d'encre 530 et 535 de telle sorte qu'il n'est visible que par réflexion ou, avantageusement, par transparence, à l'aide d'une source lumineuse intense, de préférence ponctuelle, sous certaines conditions. De façon avantageuse, l'encre des films 530 et 535 est opaque lorsqu'elle est dans un environnement normal d'utilisation du document sécurisé 500, par exemple lorsque la température est comprise entre 0°C et 35°C, et devient transparente lorsqu'elle est soumise à des contraintes particulières, par exemple lorsque la température est supérieure à 40°C pour révéler, par réflexion ou, avantageusement, par transparence, l'élément graphique d'authentification 540.The authentication graphic element 540 is hidden between the opaque layers 215 and 220 and between the ink films 530 and 535 so that it is visible only by reflection or, advantageously, by transparency, to the using an intense light source, preferably punctual, under certain conditions. Advantageously, the ink of the films 530 and 535 is opaque when it is in a normal environment of use of the secure document 500, for example when the temperature is between 0 ° C. and 35 ° C., and becomes transparent when it is subject to particular constraints, for example when the temperature is greater than 40 ° C to reveal, by reflection or, advantageously, by transparency, the authentication graphic element 540.

L'encre utilisée par les films 530 et 535 est par exemple l'encre UV "35" 75020 de la société PETREL ou l'encre 3Z7U538 de la société SICPA. Ces encres sont déposées par sérigraphie. Elles sont noires à température ambiante et deviennent transparentes à partir de 35°C et de 38°C, respectivement.The ink used by the films 530 and 535 is, for example, the UV ink "35" 75020 from the company PETREL or the ink 3Z7U538 from the company SICPA. These inks are deposited by screen printing. They are black at room temperature and become clear from 35 ° C and 38 ° C, respectively.

L'élément graphique d'authentification 540 peut être imprimé à l'aide d'une encre standard ou à l'aide d'une encre dont la structure interne change lorsqu'elle est exposée à des variations physiques de son environnement.The authentication graphics element 540 can be printed using standard ink or using an ink whose internal structure changes when exposed to physical variations in its environment.

Ainsi, par exemple, les films 530 et 535 peuvent utiliser une encre qui n'est transparente que sous certaines conditions de température et l'élément graphique d'authentification 540 peut utiliser une encre qui n'est opaque que sous certaines conditions électriques. Il est alors nécessaire de soumettre le document sécurisé, ou au moins une partie de celui-ci à une température et à un environnement électrique prédéterminés pour visualiser, par transparence, l'élément graphique d'authentification 540.Thus, for example, films 530 and 535 may use an ink that is transparent only under certain temperature conditions, and the authentication graphics element 540 may use an ink that is opaque only under certain electrical conditions. It is then necessary to submit the secure document, or at least a part thereof at a predetermined temperature and electrical environment to view, by transparency, the authentication graphic element 540.

La figure 6, comprenant les figures 6a, 6b et 6c, illustre l'observation qui peut être faite du document sécurisé 500, présenté sur la figure 5, lorsque les conditions d'éclairage et l'environnement d'utilisation changent.The figure 6 , including Figures 6a, 6b and 6c , illustrates the observation that can be made of secure document 500, presented on the figure 5 , when the lighting conditions and the environment of use change.

La figure 6a représente une vue du document sécurisé 500 dans des conditions normales d'éclairage et dans un environnement normal d'utilisation. La figure 6a représente donc le document sécurisé 500 tel qu'il peut être visualisé par un utilisateur. Comme illustré, un visuel 600 est imprimé sur le document sécurisé 500. Le visuel est par exemple imprimé sur une face externe des couches opaques (références 515 et 520 sur la figure 5) et visible à travers l'overlay (références 505 et 510 sur la figure 5).The figure 6a represents a view of the secure document 500 under normal lighting conditions and in a normal environment of use. The figure 6a therefore represents the secure document 500 as it can be viewed by a user. As illustrated, a visual 600 is printed on the secure document 500. The visual is for example printed on an outer face of the opaque layers (references 515 and 520 on the figure 5 ) and visible through the overlay (references 505 and 510 on the figure 5 ).

Là encore, les conditions normales d'éclairage sont, par exemple, un éclairage naturel ou artificiel ne faisant pas appel à des instruments optiques particuliers et un environnement normal d'utilisation est, par exemple, une température comprise entre 0°C et 35°C.Again, the normal lighting conditions are, for example, natural or artificial lighting that does not use particular optical instruments and a normal environment of use is, for example, a temperature between 0 ° C and 35 ° vs.

Dans ces conditions, les couches opaques (références 515 et 520 sur la figure 5) dissimulent l'élément graphique d'authentification 540 ainsi que les motifs formés par les films 530 et 540.Under these conditions, the opaque layers (references 515 and 520 on the figure 5 ) conceal the authentication graphic element 540 and the patterns formed by the films 530 and 540.

La figure 6b représente une vue du document sécurisé 500, éclairé à l'aide d'une lumière intense et ponctuelle, vu par transparence, dans un environnement normal d'utilisation. La lumière intense et ponctuelle est obtenue, par exemple, à l'aide d'un dispositif tel qu'une source lumineuse Flexilux de la société Schölly. Comme illustré, la lumière intense et ponctuelle permet de révéler les motifs formés par les films 530 et 535, ici le logo « OCS ». L'élément graphique d'authentification 540, dissimulé entre les films 530 et 535, n'est pas visible.The figure 6b represents a view of the secure document 500, illuminated with intense light and punctual, seen by transparency, in a normal environment of use. The intense and punctual light is obtained, for example, using a device such as a Flexilux light source from Schölly. As illustrated, the intense and punctual light reveals the patterns formed by the films 530 and 535, here the logo "OCS". The authentication graphic element 540, concealed between the films 530 and 535, is not visible.

La figure 6c illustre une vue du document sécurisé 500, éclairé à l'aide d'une lumière intense et ponctuelle, vu par transparence, dans un environnement d'utilisation particulier, par exemple, dans le cas d'une encre thermochromique, un environnement dans lequel le document sécurisé, ou une partie de celui-ci, est porté à une température supérieure à 40°C, c'est-à-dire un environnement permettant de rendre l'encre des films 530 et 535 transparente. La chaleur peut être générée par la source de lumière elle-même ou par une autre source. Dans ces conditions, l'encre utilisée pour former les films 530 et 535 devient transparente. Il est ainsi possible de visualiser et/ou d'identifier l'élément graphique d'authentification 540.The Figure 6c illustrates a view of the secure document 500, illuminated with the aid of an intense and punctual light, seen by transparency, in a particular environment of use, for example, in the case of a thermochromic ink, an environment in which the secure document, or a part thereof, is brought to a temperature above 40 ° C, that is to say an environment to make the ink 530 films and 535 transparent. The heat can be generated by the light source itself or by another source. Under these conditions, the ink used to form the films 530 and 535 becomes transparent. It is thus possible to display and / or identify the authentication graphic element 540.

La combinaison des couches opaques, des films d'encre dont les caractéristiques varient avec les conditions physiques dans lesquelles se trouve le document sécurisé, ou au moins une partie de celui-ci, et des éléments graphiques d'authentification imprimés ou non à l'aide d'une encre dont les caractéristiques varient avec les conditions physiques dans lesquelles se trouve le document sécurisé, ou au moins une partie de celui-ci, permet de renforcer le niveau de sécurité des documents sécurisés. En effet, les éléments graphiques d'authentification sont invisibles en condition normale, ils ne peuvent être observés que par réflexion ou, avantageusement, par transparence à l'aide d'une lumière intense, de préférence ponctuelle. De plus, les éléments graphiques d'authentification dissimulés ne se révèlent que dans des conditions particulières, par exemple si le document sécurisé, ou une partie de celui-ci, est chauffée. Cette sécurité est très difficilement violable car il faut délaminer le document sécurisé sans l'abîmer et sans abîmer les éléments graphiques d'authentification.The combination of opaque layers, ink films whose characteristics vary with the physical conditions in which the secure document is located, or at least a portion thereof, and graphic authentication elements printed or not printed at using an ink whose characteristics vary with the physical conditions in which the secure document is located, or at least a part thereof, makes it possible to reinforce the security level of the secured documents. Indeed, the graphic authentication elements are invisible in normal condition, they can be observed only by reflection or, advantageously, by transparency using an intense light, preferably punctual. In addition, the hidden authentication graphics elements are only revealed in particular conditions, for example if the secure document, or a part thereof, is heated. This security is very difficult to violate because it is necessary to delaminate the secure document without damaging it and without damaging the graphic authentication elements.

L'encre utilisée pour former le film 530 peut être différente de l'encre utilisée pour former le film 535 afin d'imposer une contrainte forte sur l'environnement permettant de rendre ces encres transparentes simultanément.The ink used to form the film 530 may be different from the ink used to form the film 535 to impose a strong stress on the environment to make these inks transparent simultaneously.

L'invention peut également être mise en oeuvre avec l'un seulement des deux films 530 et 535.The invention can also be implemented with only one of the two films 530 and 535.

Un exemple du procédé pour fabriquer le document sécurisé illustré sur les figures 5 et 6 est représenté sur la figure 4. Cependant, contrairement au procédé de fabrication décrit par référence à cette figure, l'étape 405 consiste ici à,

  • imprimer un premier film d'encre dont les caractéristiques varient avec les conditions physiques dans lesquelles se trouve le document sécurisé sur une face intérieure de l'une des couches opaques ou, plus généralement, sur une face d'une couche interne ;
  • imprimer un élément visuel d'authentification sur le film préalablement imprimé ; et,
  • imprimer sur l'ensemble, sur une autre face intérieure de l'une des couches opaques ou, plus généralement, sur une autre face d'une couche interne au moins un second film d'encre dont les caractéristiques varient avec les conditions physiques dans lesquelles se trouve la carte d'identification.
An example of the method for producing the secure document illustrated on the figures 5 and 6 is represented on the figure 4 . However, unlike the manufacturing method described with reference to this figure, step 405 here consists of
  • printing a first ink film whose characteristics vary with the physical conditions in which the secure document is located on an inner face of one of the opaque layers or, more generally, on one face of an inner layer;
  • print a visual authentication element on the previously printed film; and,
  • print on the whole, on another inner face of one of the opaque layers or, more generally, on another face of a layer at least one second ink film whose characteristics vary with the physical conditions in which the identification card is located.

Il convient de noter qu'il est possible d'imprimer les films d'encre dont les caractéristiques varient avec les conditions physiques dans lesquelles se trouve la carte d'identification et les éléments visuels d'authentification sur des couches différentes à partir du moment où ces impressions sont au moins partiellement alignées et que l'élément graphique d'authentification est compris, au moins partiellement, entre les films d'encre et les couches opaques.It should be noted that it is possible to print ink films whose characteristics vary with the physical conditions in which the identification card and the visual authentication elements on different layers are located from the moment when these prints are at least partially aligned and the graphic authentication element is at least partially comprised between the ink films and the opaque layers.

La figure 7 illustre un exemple de dispositif 700 pour authentifier un document sécurisé tel que décrit précédemment, c'est-à-dire pour vérifier la présence d'un élément graphique d'authentification dans l'épaisseur du document sécurisé. Le dispositif 700 comprend un support de document 705 comprenant lui-même une zone 710 transparente ou évidée permettant d'observer, par transparence, un document placé sur le support 705.The figure 7 illustrates an example device 700 for authenticating a secure document as described above, that is to say to check the presence of an authentication graphic element in the thickness of the secure document. The device 700 comprises a document support 705 itself comprising a transparent or recessed area 710 making it possible to observe, by transparency, a document placed on the support 705.

Une cavité du dispositif 700 comprend des moyens d'éclairage 715, ces moyens d'éclairage 715 étant situés à l'opposé du support 705 par rapport au point à partir duquel un utilisateur observe un document sécurisé placé dans le support 705. De préférence, les moyens d'éclairage 715 permettent de produire une lumière intense dirigée vers la zone transparente 710 ou, plus précisément, sur l'emplacement de la zone transparente 710 où un élément graphique d'authentification doit être observé.A cavity of the device 700 comprises lighting means 715, these lighting means 715 being situated opposite the support 705 with respect to the point from which a user observes a secure document placed in the support 705. Preferably, the illumination means 715 make it possible to produce intense light directed towards the transparent zone 710 or, more precisely, on the location of the transparent zone 710 where a graphic authentication element must be observed.

De façon avantageuse, des parois opaques 720 permettent d'isoler les moyens d'éclairage 715 de telle sorte que l'utilisateur du dispositif 700 ne soit pas ébloui lorsqu'il observe un document sécurisé par transparence.Advantageously, opaque walls 720 make it possible to isolate the lighting means 715 in such a way that the user of the device 700 is not dazzled when he observes a document secured by transparency.

De plus, le dispositif 700 comprend des moyens 725 permettant de modifier la structure de l'encre utilisée dans le document sécurité analysé. La nature de ces moyens dépend du type d'encre utilisée dans le document sécurisé analysé. Il peut s'agir, par exemple, de moyens de chauffage. De façon avantageuse, le dispositif 700 dispose d'un contrôleur 730 permettant de contrôler les moyens 725 pour choisir, par exemple, la température à laquelle doit être portée un document sécurisé, ou une partie de celui-ci, inséré dans le support 705. Le dispositif 700 peut intégrer plusieurs types de moyens 725 pouvant chacun être contrôlé indépendamment par un contrôleur 730 adapté, afin que le dispositif 700 puisse être utilisé pour différents types d'encre ou pour déterminer un environnement dans lequel plusieurs paramètres doivent être contrôlés simultanément.In addition, the device 700 comprises means 725 for modifying the structure of the ink used in the analyzed security document. The nature of these means depends on the type of ink used in the analyzed document analyzed. It may be, for example, heating means. Advantageously, the device 700 has a controller 730 for controlling the means 725 to choose, for example, the temperature to which is to be carried a secure document, or a part thereof, inserted in the support 705. The device 700 can integrate several types of means 725 each of which can be independently controlled by a suitable controller 730, so that the device 700 can be used for different types of ink or to determine an environment in which several parameters must be controlled simultaneously.

L'encre dont les caractéristiques varient avec les conditions physiques dans lesquelles se trouve le document sécurisé, utilisée pour former les films et/ou les éléments graphiques d'authentification, est de préférence imprimée par sérigraphie qui permet un dépôt d'une épaisseur suffisante pour obtenir l'effet souhaité. L'impression est ici réalisée sur une face d'une couche intérieure du document sécurisé. L'encre peut être à séchage par UV ou par flux d'air chaud. Tout type d'élément graphique tel que du texte, des dessins, des logos et des numéros peut être imprimé. Une large gamme de couleurs peut être utilisée.The ink, the characteristics of which vary with the physical conditions in which the secure document, used for forming the films and / or the authentication graphic elements, is preferably printed is screen printed which allows a deposit of sufficient thickness to get the desired effect. The printing is here performed on one side of an inner layer of the secure document. The ink may be UV or hot-air drying. Any type of graphic element such as text, drawings, logos and numbers can be printed. A wide range of colors can be used.

L'impression avec une encre dont les caractéristiques varient avec les conditions physiques dans lesquelles se trouve le document sécurisé peut être combinée avec une impression classique de telle sorte que seule une partie des motifs apparaît et disparaît avec les changements d'environnement physique du document sécurisé.Printing with an ink whose characteristics vary with the physical conditions in which the secure document is located can be combined with conventional printing so that only a part of the patterns appears and disappears with the changes in the physical environment of the secure document .

Les motifs imprimés permettant l'authentification, qui ne représentent pas des informations personnelles, sont avantageusement identiques pour un lot de documents sécurisés. Comme indiqué précédemment, l'étape de personnalisation est de préférence réalisée ultérieurement lorsque le document sécurisé est assemblé.The printed patterns for authentication, which do not represent personal information, are advantageously identical for a batch of secure documents. As indicated above, the personalization step is preferably performed later when the secure document is assembled.

D'autres modes d'impression tels que l'impression par transfert thermique et l'impression utilisant un laser peuvent être utilisés.Other printing modes such as thermal transfer printing and laser printing can be used.

Naturellement, pour satisfaire des besoins spécifiques, une personne compétente dans le domaine de l'invention pourra appliquer des modifications dans la description précédente.Naturally, to meet specific needs, a person skilled in the field of the invention may apply modifications in the foregoing description.

Claims (15)

  1. Secure document (200, 500) comprising a plurality of layers (205, 210, 215, 220, 225) which are stacked and non-releasably sealed, forming two parallel outer faces, one of said layers (205, 210, 215, 220, 225) comprising on an inner face a pattern (230, 540) produced at least in part using an ink of which the visual characteristics vary according to at least one physical condition of the environment in which said ink is located, the secure document (200, 500) being characterised in that it further comprises at least a first opaque region (215, 220, 515, 520) formed between said pattern (230, 540) and one of said two outer faces and at least a second opaque region (215, 220, 515, 520) formed between said pattern and the other of said two outer faces, said first and second opaque regions (215, 220, 515, 520) masking said pattern at least in part.
  2. Secure document (200, 500) according to the preceding claim, characterised in that said secure document (200, 500) is a microcircuit card having a thickness substantially equal to 0.76 mm, in accordance with ISO standard 7816.
  3. Secure document (200, 500) according to anyone of the preceding claims, characterised in that at least one of said layers (205, 210, 215, 220, 225) is made of plastics material.
  4. Secure document (200, 500) according to anyone of the preceding claims, characterised in that a layer comprising at least a portion of said first or second opaque region (215, 220, 515, 520) has a thickness of between 100 and 350 µm.
  5. Secure document (200, 500) according to anyone of the preceding claims, characterised in that said ink has at least two states linked to said at least one physical condition of the environment in which said ink is located, one of said at least two states allowing said pattern (230, 540) to be viewed through said at least a first and a second opaque regions (215, 220, 515, 520).
  6. Secure document (200, 500) according to claim 5, characterised in that said one of said at least two states is a state in which said ink is coloured.
  7. Secure document (200, 500) according to anyone of claims 1 to 4, characterised in that a second pattern (530, 535), which is different from said pattern (230, 540) referred to as the first pattern (230, 540), is provided on an inner face, said second pattern being aligned at least in part with said first pattern (230, 540) and said at least a first and a second opaque regions (215, 220, 515, 520) formed between said pattern and said two outer faces, said ink having at least two states linked to said at least one physical condition of the environment in which said ink is located, one of said at least two states being translucent to allow said second pattern to be viewed through said at least one opaque region, the ink of said second pattern (530, 535) being substantially stable in relation to said at least one physical condition of the environment in which said ink is located.
  8. Method for producing a secure document (200, 500) according to anyone of claims 1 to 6, the method being characterised in that it comprises the following steps:
    - printing (405) at least a portion of said pattern (230, 540) using said ink on a face of a first layer of said plurality of layers; and
    - assembling (410, 415) said first layer comprising said pattern (230, 540) and at least a second layer, said pattern being situated between said first and second layers.
  9. Method according to the preceding claim for producing a secure document (200, 500) according to claim 7, the method further comprising a step of printing at least a portion of said second pattern (530, 535) on said at least a portion of said first pattern (230, 540), said second pattern (530, 535) being situated between said first and second layers (215, 220, 515, 520).
  10. Method according to claim 8 for producing a secure document (200, 500) according to claim 7, the method further comprising a step of printing at least a portion of said second pattern (530, 535) on a face of said second layer, said second pattern (530, 535) being situated between said first and second layers.
  11. Method according to anyone of claims 8 to 10, characterised in that said assembling step comprises a step of assembling by lamination.
  12. Device (700) for authenticating a secure document (200, 500) according to anyone of claims 1 to 7, the device being characterised in that it comprises the following means:
    - means (705) for receiving said secure document (200, 500);
    - means (715) for illuminating said secure document (200, 500) at least in part when said secure document (200, 500) is placed in said means (705) for receiving said secure document (200, 500), said illuminating means (715) making it possible to observe said document (200, 500) by light passing through the document;
    - means (725) for modifying the state of said ink of which the characteristics vary with said at least one physical condition of the environment in which said ink is located; and
    - means (720) for optically isolating said illuminating means (715).
  13. Method for authenticating a secure document (200, 500) according to anyone of claims 1 to 6, the method being characterised in that it comprises the following steps:
    - illuminating at least a portion of said secure document (200, 500) comprising at least a portion of said pattern (230, 540) with an intense light;
    - viewing at least a portion of said pattern (230, 540) through said at least a first or second opaque region (215, 220, 515, 520);
    - changing said at least one physical condition of the environment in which said ink is located; and
    - observing the evanescence of at least a portion of said pattern (230, 540).
  14. Method according to the preceding claim for authenticating a secure document (200, 500) according to claim 7, the method further comprising the following steps:
    - illuminating at least a portion of said secure document (200, 500) comprising at least a portion of said second pattern (530, 535) with an intense light;
    and, after changing said at least one physical condition of the environment in which said ink is located,
    - viewing at least a portion of said second pattern (530, 535) through said at least one opaque region.
  15. Method according to either claim 13 or claim 14, further comprising a step of using a source of artificial light to generate said intense light.
EP08165254.7A 2007-09-28 2008-09-26 Security document, method and device for authenticating such document and method of manufacturing such document Revoked EP2042342B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL08165254T PL2042342T3 (en) 2007-09-28 2008-09-26 Security document, method and device for authenticating such document and method of manufacturing such document

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0757952A FR2921584A1 (en) 2007-09-28 2007-09-28 SECURE DOCUMENTS, METHODS AND DEVICES FOR AUTHENTICATING SUCH DOCUMENTS AND METHOD FOR MANUFACTURING THE SAME.

Publications (2)

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EP2042342A1 EP2042342A1 (en) 2009-04-01
EP2042342B1 true EP2042342B1 (en) 2013-12-11

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EP08165254.7A Revoked EP2042342B1 (en) 2007-09-28 2008-09-26 Security document, method and device for authenticating such document and method of manufacturing such document

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EP (1) EP2042342B1 (en)
ES (1) ES2451572T3 (en)
FR (1) FR2921584A1 (en)
PL (1) PL2042342T3 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011010127A1 (en) * 2011-02-02 2012-08-02 Giesecke & Devrient Gmbh Authenticity assurance of value documents by means of photochromic dyes

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4126051C2 (en) * 1991-08-06 2002-06-13 Gao Ges Automation Org Security document with embedded security element, security element and method for its production
DE19735293C2 (en) * 1997-08-14 2003-06-12 Bundesdruckerei Gmbh Value and security product with luminescent element
DE10046710A1 (en) * 2000-09-21 2002-04-18 Bundesdruckerei Gmbh Counterfeiting and theft protection system, especially for valuable and security documents, has electronic component(s) in form of LCR oscillator(s) stimulated by electromagnetic radiation
EP1503907B1 (en) * 2002-05-14 2007-01-24 Leonhard Kurz GmbH & Co. KG Optically variable element comprising a sequence of thin-film layers
DE10344384B4 (en) * 2003-09-23 2008-07-10 Bundesdruckerei Gmbh Method for checking an authentication feature of a rotating optical data carrier and digital data carrier
DE102005006277B4 (en) * 2005-02-10 2007-09-20 Ovd Kinegram Ag Method for producing a multilayer body
AT502714B1 (en) * 2005-10-25 2012-04-15 Binder Consulting Gmbh METHOD FOR CREATING AND VERIFYING A SAFE CLEAR TEXT PRINT, AND DEVICE AND INFORMATION CARRIER THEREFOR

Also Published As

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ES2451572T3 (en) 2014-03-27
EP2042342A1 (en) 2009-04-01
FR2921584A1 (en) 2009-04-03
PL2042342T3 (en) 2014-05-30

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