FR2828316A1 - Method for prevention of fraudulent reproduction of documents by provision of layers of increasing security on the same area of a document, the delamination of which will lead to document destruction - Google Patents

Abstract

Method in which three levels of progressive security are combined on the same spatial zone of a document that can be inspected by increasingly sophisticated methods, e.g. the naked eye, a simple appliance such as a UV lamp and using a sophisticated scientific analysis device. The invention also relates to a corresponding device with a secure code masked by the third level layer (4). The device is designed such that attempted delamination of the layers will result in the destruction of the code.

Description

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 The present invention relates to a process a-aumentmcauon to a document such as for example identification cards, labels, warranty card or any other document whose purpose is to authenticate the document itself, a commodity, information or a person.

 In the usual practice, the control of the said document intervenes at different levels, which combined together, allow a presumption or the quasi-certainty of being in front of a document, of information, of a person or of a good authentic.

 The first level is the recognition by the user (often the consumer) of one or more signs, generally visual or tactile, giving him the presumption of authenticity. These signs can be for example holograms, inks whose color changes according to the mink angle associated for example with a relief printing making it possible to obtain a double image, intaglio prints.

These devices are found on many documents such as banknotes, identity documents, security labels, etc.

 The second level of control consists of verification using simple equipment. We can cite as examples: a UV lamp, making it possible to discover, in the wavelength of ultra violet, an impression invisible to the human eye; a polarizing filter for reading non-visible information; a laptop computer checking the concordance of different codes linked to each other, via a database (patent n 9,707,051 Sequoias). Many relevant devices exist and have been developed according to the applications. This second level allows controllers (for example: the police for identity documents, the bank counter for a ticket, a retail store for goods, the brand controller to combat the gray market, the seller a lottery ticket which will have to settle the amount of a winning lot) to obtain a reinforced presumption on the authenticity of the document.

 The third level of control consists in implementing more sophisticated means, in order to control hidden signs, for almost certain authentication. As examples, mention may be made of the analysis of specific DNAs incorporated into the inks; verification of the presence of rare earths; the persistence of a phosphorescent signal excited by a light source; magnetic coating detection and interpretation; reading of copyable or incopiable code masked by transparent infrared coatings, and readable using an appropriate reader; the interpretation of codes deemed to be unworkable such as those described in known patents (Banque de France no. 9,913,936). The third level is generally controlled by a

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 specially dedicated expert structure, responsible for initiating investigations in the case of forgery, counterfeiting or falsification.

 These different devices are generally juxtaposed on the same document or object.

 The invention consists, on the same area of a support (1 or l bis), in superimposing or combining the three safety levels presented (2) (3) and (4). Its advantage is to deceive the counterfeiters and falsifiers on the number of security of the document, and to complicate singularly their task for the reproduction of these stacked security.

 In one of the applications, the invention uses known safe pigments, the properties of which are: firstly to visually change color according to the viewing angle, secondly to be transparent in the infrared wavelengths, thirdly to disappear under a polarizing filter and appear under another polarizing filter by changing visual appearance. These pigments can also be incorporated into a varnish whose property is to swell, thus making it possible to obtain a double image with a variable color effect.

 In another version of the invention, a code or a message (4bis), secure or not, can be masked by a transparent infrared coating (4).

 In another version of the invention, half-flesh cuts can be made in order to make the support destructible in the event of an attempt at delamination.

 In another version of the invention (fig. 5), these different layers can be printed in a mirror, the prints being trapped between a transparent support (1a) (for example, tracing paper, polyester, polypropylene), and a layer adhesive (5). A layer of furrowed varnish (6) can also be previously printed to allow partial or total destruction of the captive print.

Thus, the invention allows:
To present without any device, a visible sign (2) identifiable by the consumer (fig. 1).

Control of the second level (3) using simple equipment (fig. 2)
Control of the third level (4 and / or 4bis) using more sophisticated means, such as for example a camera fitted with an infrared filter (fig. 3).

Claims (4)

1) Method for securing security documents characterized by the fact that it superimposes or combines on the same geographical area of the document three progressive levels of security, controllable respectively with the naked eye, with a simple device (UV lamp, filter, etc.) ...), and by means of sophisticated equipment or scientific analysis.  2) Device according to claim 1 characterized in that it comprises a secure code or a message, masked by the layer (4) of third level.  3) Device according to claim 1 characterized in that it comprises a securing of the location of the safeties by cutting half-flesh of the support receiving said safeties to prevent delamination.  4) Device according to claim 1 characterized in that the prints are made in a mirror on a transparent support (la) and trapped between said support and a layer of adhesive (5).  4) Device according to claims 1 and 3 characterized in that it comprises the printing of a layer of silicone varnish (6) to allow partial or total destruction of the prisoner impression.