CA2855263A1 - Document, method and device for manufacturing a document and method and device for identifying a document - Google Patents

Abstract

The plan document (100) comprises; on a first face (105) of the document, at least one printed mark (1 10, 1 15, 120, 125, 130), on a second face of the document opposite to said first face, at least one invisible printed mark superimposed on a mark (120, 125) printed on said first face, in at least one pair of superimposed marks formed on said opposite faces, at least one of the marks of said pair has a single content. In embodiments, at least one said invisible mark is a two-dimensional bar code and / or at least one said invisible mark is an anti-copy mark. In embodiments, the content of at least one mark (1 10) is representative of the position of an invisible mark on the document.

Description

DOCUMENT, METHOD AND DEVICE FOR MANUFACTURING DOCUMENT AND
DOCUMENT IDENTIFICATION METHOD AND DEVICE
The present invention relates to a document, a method and a device for document manufacturing and a method and device for identifying document. She applies, in particular, to the authentication of a paper document.
There are many ways to authenticate a document, by giving it, when making a sheet of recognizable features. By example, a Watermark allows you to change the local transparency of a document. Similarly, inserting materials in the paper, such as fibers or bands should allow to render the documents formed with paper tamper-proof.
However, these techniques are very expensive and reproduced, more or less faithfully by counterfeiters.
There are techniques for memorizing physical characteristics of a document, for example the form of fibers in a given part of the document.
However, recognition of the document based on a new analysis is very sensitive to variations of angle of analysis, in particular of image sensor and can not, finally, to be used only in the laboratory.
The present invention aims to remedy these disadvantages.
For this purpose, according to a first aspect, the present invention aims at a document plan characterized in that it comprises:
on a first face of the document, at least one printed mark, on a second face of the document opposite to said first face, at least an invisible printed mark superimposed on a mark printed on the said first face, in at least one pair of superimposed marks formed on said faces opposed, at least one of the marks of said pair has a unique content.
Thanks to these provisions, the document is triply protected. On the one hand, determining the presence of an invisible mark provides a first level protection.
On the other hand, the precision of the superimposition of the marks gives a second level of protection because it is very difficult to superimpose the impression of two accurately marks on two opposite sides of a document. In addition, the unique content of at least A brand supported by the document makes it possible to uniquely identify the document.
According to particular characteristics, in at least one pair of marks superimposed, each printed mark is invisible.
The detection of document protection is thus even more difficult.

2 According to particular characteristics, each of marks of at least one couple superimposed brands has unique content.
The identification of the document is thus stronger.
According to particular characteristics, at least one said invisible mark is a two-dimensional barcode. Thanks to these arrangements, once an image of the brand taken, one can use standard treatment systems.
According to particular characteristics, at least one said invisible mark is a anti-copy mark. Thanks to these provisions, it can be determined whether the document is a original or a copy.
According to particular characteristics, at least one invisible mark is consisting of a varnish. Thanks to these provisions, the mark is particularly sustainable.
According to particular features, the content of at least one mark is representative of the position of an invisible mark on the document. So, to find a invisible brand, we use the content of another brand, for example visible.
According to a second aspect, the present invention relates to a manufacturing process of a plan document, characterized in that it comprises:
a step of generating a brand having a unique content, a step of printing, on a first face of the document, of at least one printed mark and a printing step, on a second face of the document opposite to said first face, of at least one invisible printed mark superimposed on a mark printed on said first face, in at least one printing step, for at least a couple of marks superimposed formed on said opposite faces, at least one of the marks being a Mark generated with unique content.
According to a third aspect, the present invention aims at a method Identification of a document, characterized in that it comprises:
a step of capturing an image of a first mark on a first face of the document, a step of capturing an image of a second mark on a second face of the document, superimposed on the first mark, a step of reading the contents of one of the first and second marks and a step of identifying the document according to said content.
According to particular characteristics, at least one of the capture steps a image comprises a step of depositing visible material on the mark, one of which picture is captured.

3 According to a fourth aspect, the present invention aims at a device for manufacturing of a plan document, characterized in that it comprises:
a means of generating a brand having a unique content, a means of printing, on a first face of the document, of at least one printed mark and a printing means, on a second face of the document opposite to said first face, of at least one invisible printed mark superimposed on a mark printed on said first face, at least one of the printing means being adapted, for at least a pair of brands superimposed formed on said opposite faces, so that at least one of the brands either a generated brand with unique content.
According to a fifth aspect, the present invention aims at a device Identification of a document, characterized in that it comprises:
a means of capturing an image of a first mark on a first face of the document, a means for capturing an image of a second mark on a second face of the document, superimposed on the first mark, a means for reading the contents of one of the first and second marks and a means for identifying the document according to said content.
The advantages, aims and special characteristics of this process of manufacturing, of this identification process, of this manufacturing device and of this identification device being identical to those of the document which is the subject of the present invention, such as succinctly exposed above, they are not recalled here.
Other advantages, goals and special features of this invention will emerge from the description which follows, for the purpose of explanation and in no way limiting reference to the appended drawings, in which:
FIG. 1 represents, schematically, a first face of a mode of particular embodiment of a document object of the present invention, FIG. 2 represents, schematically, a second face of the document illustrated in Figure 1, FIG. 3 represents, in the form of a logic diagram, the steps taken in artwork in a particular embodiment of the manufacturing process object of the present invention, FIG. 4 represents, in the form of a logic diagram, the steps implemented artwork in a particular embodiment of the object identification method of the present invention, WO 2011/06450

4 PCT / FR2010 / 052527 FIG. 5 represents, schematically, an embodiment particular of manufacturing device object of the present invention and FIG. 6 represents, schematically, an embodiment particular of identification device object of the present invention.
It is noted that the figures are not to scale.
FIGS. 1 and 2 show a plan document 100 which comprises:
on a first face 105, illustrated in FIG. 1, five printed marks 115, 120, 125 and 130 and on a second face 150, illustrated in FIG. 2, three printed marks 160 and 165.
The document 100 is a plan document. For example, it is made up of paper, plasticized paper, fabric or plastic material. In the case shown, the document 100 is a sheet of a standard format. The faces 105 and 150 are coplanar.
The printed mark 110 is a visible mark positioned at the bottom of the page. The content of the mark 110 is variable from one document to another and, preferably unique for the document in question. In the embodiment described, the mark 110 is a two-dimensional barcode, also called Datamatrix. The brand printed 115 is a visible mark placed next to the mark 110. The contents of the mark 115 is variable from one document to another and, preferably, unique for the considered document.
In the embodiment described, the mark 115 is an anti-copy mark, that is to say that its characteristics deteriorate in a measurable way during a copy of the document 100.
For example, an anti-copy mark has a high redundancy rate and is printed with a resolution, related to print quality, such as, as soon printing, by following random physical phenomena, the redundancy rate to put to correct and read the content of the anti-copy mark is high, preferably greater than 10 percent. So, a copy of the mark copy-proof made with quality printing means similar to those used for the initial impression causes an increase in the amount of redundancy to be implemented to correct and read the contents of the anti-copy mark that can be detect for recognize an original a copy.
The reader can refer to the document WO 2009 004172 (POT FR2008 / 00743) for the determination and manufacture of the mark 115.
The content of marks 110 and 115 is correlated, that is to say that the content of Moon marks 110 or 115 is a function of the content of the other mark.
The printed marks 120, 125 and 130 are invisible marks. They are consisting of, for example, varnish or an invisible ink doped, based aqueous. The mark 120 has a fixed content, that is to say, common to a set of documents.
The marks 125 and 130 have a unique content, that is to say that only the document 100 wears them.
The printed marks 155, 160 and 165 are invisible marks. They are

5 consisting of, for example, varnish. The mark 155 is superimposed on the mark 120, that is to say that it has the same dimensions as the mark 120 and that its contour is superimposed on the outline of the mark 120. The marks 120 and 155 therefore have forms symmetrical with respect to an axis of the plane of the document. The mark 160 is superimposed on the mark 125. Finally, the mark 165 is not superimposed on any mark of the first face 105. The content of marks 155 and 160 is unique.
Thus, in at least one pair of superimposed marks 120-155 or 125-160, at least one of the couple's brands has unique content.
According to the variants, the document object of the present invention does not include no visible mark.
It can be seen in FIG. 3 that to make a document that is the subject of this firstly, a step 305 for determining information is performed.
to wear by the content of the marks to be printed.
For example, this information includes:
- a production order, - a manufacturing unit identifier, - a date of manufacture, - a type of manufacture, - a unique serial number and / or - a manufacturer's order giver.
During a step 310, a print position of at least one couple of superimposed marks. For example, this position is determined randomly.
Then, during a step 315, an anti-copy mark is constituted.
representative of at least part of the information obtained during the course of step 305.
During a step 320, a barcode mark is established in two dimensions representative of at least part of the information obtained in during step 305.
During a step 325, a representative mark of the position of each pair of superimposed marks.
Preferably, during the steps 315, 320 and 325, it is inserted in the contents of the marks of the error correction codes (or FEC for forward error correction ). The proportion of FEC redundancies is higher for anti-marks copy only for two-dimensional barcodes.

6 It is observed that the marks resulting from steps 315, 320 and 325 are files points, for example binary, representing the print values to achieve. By example, in the case of binary marks, for each point to be printed, a value represents the impression and another value represents the absence of printing.
During a step 330, the two faces of a document to form all visible or invisible marks, superimposed or not described with reference to Figure 1. Preferably, the brand representative of the position other brands is print visibly and in a fixed position on the different documents.
It can be seen in Figure 4 that, to identify a document, that is to say the recognize in a unique way, in one embodiment of the method object identification of the present invention, a step 405 of constitution is first performed.
a support of uniform visible material. For example, carbon black is deposited on a leaf.
Then, during a step 410, a visible mark is read on the document.
During a step 415, the position of each invisible mark is determined in function of the content of the visible mark.
During a step 420, the material visible on the document is applied to the places where the invisible marks are.
During a step 425, the excess visible material is removed from the places where is invisible marks, for example by applying and removing a adhesive to these locations.
During a step 430, an image of the invisible mark rendered is captured.
visible by the remainder of the visible material deposit, during steps 420 and 425.
Note that this image capture can be done on the document or on a adhesive having removed an excess of visible material.
Steps 415 to 430 are repeated for the invisible masks worn on the two faces 105 and 150 of the document 100.
In a variant, steps 420 and 425 are eliminated and, during step 430, uses a light of non-visible wavelength and a sensor capable of capturing the light emitted, reflected or filtered by each invisible mask to take an image of each invisible mark.
During a step 435, the information contained in the marks is determined visible. Preferably, the correction codes are implemented of error to correct the errors represented by the captured images and the quantity of redundancies FEC used to correct errors of anti-copy marks.
During a step 440, it is determined, according to the quantity of redundancy used to correct the anti-copy marks, if the document is an original or a copy.

7 During a step 445, the accuracy of superposition of the marks is measured.
overlapping invisibles and, depending on a limit value (for example a distance), determines whether the document is an original or a copy. For this purpose, we treat the images for determine the position of the center of each invisible mark, in each of the faces of the document and we determine the distance between the centers of two marks invisible superimposed.
During a step 450, an identity of the document is determined according to of content of the marks carried by the document and, in particular, according to the content of invisible marks.
It is noted that steps 435 and 445 can be performed locally or at distance, for example by a server.
FIG. 5 shows a manufacturing device 505 comprising:
a central unit 510 provided with memories 511, - a printer 515 and a connection to a computer network 520, for communicating with a remote server 525.
The central unit 510 is adapted by executing the instructions of a program computer stored in his memories 511, in combination with the server 525, to implement the steps illustrated in Figure 3 and control the printer 515.
The server 525 maintains a database 530 in which an identifier of each document is kept with associated information, as described next to step 305.
The computer network 520 is, for example, the internet network.
The 515 printer is suitable for simultaneously printing marks on both As an alternative, the printing of the marks on the two faces is performed successively.
FIG. 6 shows an identification device 605 comprising:
a central unit 610 provided with memories 611, an image capture means 615 and - a connection to a computer network 620, to communicate with a remote server 625.
The central unit 610 is adapted by executing the instructions of a program computer stored in his memories 611, in combination with the server 625, to implement the steps shown in Figure 4 and control the capture image by the image capture means 615. The server 625 stores a database 630 in which an identifier of each document is kept with the information associated as described next to step 305.

8 The computer network 620 is, for example, the internet network. The means of image capture 615 are, for example consisting of a light source visible or invisible and an image sensor adapted to provide an image representative of a brand, visible or invisible carried by a document 635.
The present invention finds particular applications in the manufacturing mostly or completely uniform paper on which write or print information, in order to certify, a posteriori, that the document as well constituted is an original.

Claims (12)

9 1. Plan document (100) characterized in that it comprises:
on a first face (105) of the document, at least one printed mark (110, 115, 120, 125, 130), on a second face (150) of the document opposite to said first face, at less an invisible printed mark (155, 160) superimposed on a mark printed on said first face, in at least one pair of superimposed marks (120-155, 125-160) formed on said opposite faces, at least one of the marks of said pair has a unique content. 2. Document according to claim 1, characterized in that in at least one couple of superimposed marks (120-155, 125-160), each printed mark is invisible. 3. Document according to any one of claims 1 or 2, characterized in what each of marks of at least one pair of superimposed marks has a content unique. 4. Document according to any one of claims 1 to 3, characterized in that that at least a so-called invisible mark is a two-dimensional barcode. 5. Document according to any one of claims 1 to 4, characterized in that that at least a so-called invisible mark is an anti-copy mark. 6. Document according to any one of claims 1 to 5, characterized in that that at least an invisible mark consists of a varnish. 7. Document according to any one of claims 1 to 6, characterized in that that the content of at least one mark (110) is representative of the position of a Mark invisible on the document. 8. A method of manufacturing a plan document, characterized in that it comprises :
a step (305, 310, 315) of generating a brand having a content unique, a printing step (330) on a first face of the document from less a printed mark and a step (330) of printing, on a second face of the document opposite to said first face of at least one invisible printed mark superimposed on a mark printed on said first face, in at least one printing step, for at least a couple of marks superimposed formed on said opposite faces, at least one of the marks being a Mark generated with unique content. 9. A method of identifying a document (100), characterized in that has:
a step (405, 410, 415, 420, 425, 430) of capturing an image of a first mark on a first face (105) of the document, a step (405, 410, 415, 420, 425, 430) of capturing an image of a second invisible printed mark (155, 160) on a second face (150) of the document, said second mark being superimposed on a printed mark on said first face, a step (435) for reading the contents of one of the first and second marks, at least one of the marks of the said couple having a unique content and a step (450) for identifying the document according to said content. Method according to claim 9, characterized in that at least one of the steps (405, 410, 415, 420, 425, 430) for capturing an image comprises a step (420, 425) deposit visible material on the mark of which an image is captured. 11. Device (505) for manufacturing a plane document (100), characterized in what he has:
means (510, 511, 520, 525, 530) for generating a mark having a unique content, printing means (515) on a first face of the document, from less a printed mark and printing means (515) on a second face of the document opposite to said first face of at least one invisible printed mark superimposed on a mark printed on said first face, at least one of the printing means being adapted, for at least a pair of brands superimposed formed on said opposite faces, so that at least one of the brands either a generated brand with unique content. 12. Device (605) for identifying a document (100), characterized in that that it comprises:
means (615) for capturing an image of a first mark on a first side of the document, means (615) for capturing an image of a second printed mark invisible (155, 160) on a second face (150) of the document, said second mark being superimposed on a mark printed on said first face, means (610, 611, 620, 625, 630) for reading the contents of one of the first and second mark, at least one of the marks of the said couple having a unique content and means (610, 611, 620, 625, 630) for identifying the document in function said content.