EP2909817A1 - Procédés, dispositifs et document d'identification d'une personne ou d'un animal - Google Patents
Procédés, dispositifs et document d'identification d'une personne ou d'un animalInfo
- Publication number
- EP2909817A1 EP2909817A1 EP13789856.5A EP13789856A EP2909817A1 EP 2909817 A1 EP2909817 A1 EP 2909817A1 EP 13789856 A EP13789856 A EP 13789856A EP 2909817 A1 EP2909817 A1 EP 2909817A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- document
- image
- printing
- biometric data
- cells
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
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Classifications
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- 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
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/313—Fingerprints
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K11/00—Marking of animals
- A01K11/006—Automatic identification systems for animals, e.g. electronic devices, transponders for animals
-
- 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
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/305—Associated digital information
-
- 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
- B42D25/405—Marking
-
- 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
- B42D25/48—Controlling the manufacturing process
- B42D25/485—Controlling the manufacturing process by electronic processing means
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/12—Digital output to print unit, e.g. line printer, chain printer
- G06F3/1201—Dedicated interfaces to print systems
- G06F3/1223—Dedicated interfaces to print systems specifically adapted to use a particular technique
- G06F3/1237—Print job management
- G06F3/1238—Secure printing, e.g. user identification, user rights for device usage, unallowed content, blanking portions or fields of a page, releasing held jobs
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K15/00—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers
- G06K15/40—Details not directly involved in printing, e.g. machine management, management of the arrangement as a whole or of its constitutive parts
- G06K15/4095—Secure printing
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/1365—Matching; Classification
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/20—Individual registration on entry or exit involving the use of a pass
- G07C9/22—Individual registration on entry or exit involving the use of a pass in combination with an identity check of the pass holder
- G07C9/25—Individual registration on entry or exit involving the use of a pass in combination with an identity check of the pass holder using biometric data, e.g. fingerprints, iris scans or voice recognition
- G07C9/257—Individual registration on entry or exit involving the use of a pass in combination with an identity check of the pass holder using biometric data, e.g. fingerprints, iris scans or voice recognition electronically
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
- H04N1/32101—Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title
- H04N1/32144—Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title embedded in the image data, i.e. enclosed or integrated in the image, e.g. watermark, super-imposed logo or stamp
-
- B42D2035/06—
-
- 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
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/333—Watermarks
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C2209/00—Indexing scheme relating to groups G07C9/00 - G07C9/38
- G07C2209/40—Indexing scheme relating to groups G07C9/20 - G07C9/29
- G07C2209/41—Indexing scheme relating to groups G07C9/20 - G07C9/29 with means for the generation of identity documents
Definitions
- the present invention relates to a method, a device and a document identifying a person or an animal. It applies, in particular, to the production of identity documents and the verification of authenticity and integrity of identity documents.
- the present invention aims to remedy these disadvantages.
- a decoder can display the photograph of the person or animal and verify his identity.
- the biometric data encoding means is configured to apply a redundancy factor of at least three.
- the identity of the identity document holder can be verified by comparing each fingerprint data represented by the identification image with the corresponding data of a fingerprint provided during the identification.
- the capture of at least one fingerprint of the holder of the identity document is made directly on the identity document after pressing the finger concerned on the corresponding deposition surface.
- the encoding means of an authentication image is configured to form a suitable image, when printed by the printing means, to comprise at least one tenth of elementary cells whose content is wrong.
- the authentication code which can not be falsified, identifies the holder of the document, even if the identification image has been falsified.
- the encoding means of an authentication image is configured to perform a permutation of elementary cells by implementing a hashing function, or condensate, implementing a hashing key.
- the present invention aims a device object of the claim
- the present invention provides a method according to claim 13.
- the present invention is directed to a method that is the subject of the claim
- the verification method includes the step of displaying the biometric data after a step of capturing biometric data of the document holder and a step of matching verification between the captured biometric data and the decoded biometric data.
- the object document of the invention comprises a deposition surface of at least one fingerprint.
- FIG. 1 represents, schematically, particular embodiments of the device for producing an identity document and the verification device that is the subject of the present invention
- FIG. 2 represents, in the form of a logic diagram, steps of a particular embodiment of the method for producing an identity document that is the subject of the present invention
- FIG. 3 represents, in the form of a logic diagram; , steps of a particular embodiment of the verification method that is the subject of the present invention
- FIG. 5 represents, in the form of a logic diagram, steps implemented to produce an authentication image.
- means 105 for obtaining biometric data representative of this person or this animal, means 1 for coding the biometric data to form a digital identification image comprising redundancies,
- the means 10 for obtaining biometric data representative of this person or this animal may comprise at least one sensor, for example a sensor of an image of the head of the future holder of the identity document or an impression sensor. digitalis.
- the means 105 may also include means for receiving data stored in a computer memory, for example a memory of a bank, a tax service or a social security organization, memory retaining biometric data, such as the size, color of hair or eyes of the future bearer of the identity document.
- the means 1 for coding the biometric data to form a digital identification image implements a central unit 125 operating according to a program 130 whose instructions are stored in a memory 135.
- This program implements, for example, the steps illustrated in FIG. figure 2.
- the means 120 for printing the authentication image and the identification image on the document 40 is, for example consisting of a laser printer, inkjet or piezoelectric crystal.
- the printing means 120 is configured to, at the resolution of the authentication image to be printed, generate random errors in the printed elementary cells of the authentication image, as explained with the details of the means 190 and 195 .
- the biometric data of the document holder are encoded and particularly difficult to falsify.
- the printed authentication image has, from its first printing on the document, a significant amount of random errors which require that a copy, made with the same printing means as the original document, of the Printed identification image would have even more errors, the total number of errors of the copy to detect that it is a copy.
- the redundancies present in the identification image make it possible to correct the printing and / or reading defects and the marks of wear or erasure of the identification image.
- printing error a change in the appearance of a cell that modifies the interpretation of the information carried by this cell, during an analysis free from errors of reading or capture, for example microscopic. Note that if the cells often have binary values, the captured images are frequently in gray level, so we have a non-binary value associated with a cell; the latter can for example be interpreted as a probability on the original binary value of the cell.
- a gray level limit value is used to read to determine whether a cell is one color (eg white) or another (eg black), a printing error is an interpretation erroneous color of the cell of the original digital document.
- the inventors have discovered that, when the proportion of printing error is greater than a predetermined value, the copy of the form made by implementing the same printing means as the original printing, or similar means, causes necessarily an additional proportion of errors making this copy detectable.
- the native print resolution of the printing means is necessary to differentiate between the native print resolution of the printing means and the print resolution of the cells, which are each, in general, of a plurality of ink dots, each corresponding ink dot. to the native print resolution.
- the majority of printing means print in binary (presence or absence of an ink dot) at a fixed resolution, and the gray or color levels are simulated by the different techniques of dithering.
- this "native" resolution is determined by the resolution of the plate, which is, for example, 2,400 dots / inch (2,400 dpi).
- a grayscale image to be printed at 300 pixels / inch (300 dpi) would actually be printed in binary at 2,400 dpi, each pixel corresponding to approximately 8 x 8 points of the frame.
- a cell can for example represent a cell by a square block of 1 x 1, 2 x 2, 3 x 3, 4 x 4 or 5 x 5 pixels (non-square blocks are also possible), corresponding to resolutions of respectively 2,400, 1,200, 800, 600 and 480 cells / inch.
- the size of the cells to be printed is determined.
- a sub-part of the cells is determined, which sub-part is of a color uniform and variable to represent different values of an information, said sub-part being strictly less than said cell
- the first predetermined value is greater than 5%, preferably 10% and even more preferably 15% and then 20%.
- the second predetermined value is less than 30% and, preferably, 25%.
- Document this is any (physical) object carrying an information matrix
- Marking or “printing”: any process by which we move from a digital image (including an information matrix, a document ..) to its representation in the real world, this representation being generally made on a surface: this includes, non-exclusively, inkjet, laser, offset, thermal printing, as well as embossing, laser engraving, hologram generation.
- More complex processes such as molding, in which the information matrix is first etched into the mold, then molded onto each object, are also included (note that a "molded" information matrix can be seen as having three dimensions in the physical world even if its digital representation has two of them.
- many of the processes mentioned include several transformations, for example conventional offset printing (unlike the "computer-to-plate” offset), includes creating a film, said film providing for creating a plate, said plate being used in the printing, other methods also for printing information in the non-visible domain, or using frequencies at the same time. outside the visible spectrum, or to write the information inside the surface, etc., and
- Each step of the creation of the information matrix is carried out for the purpose that the original message is readable without error, even if, and this is a desired effect, the initial reading of the information matrix is tainted with errors.
- one of the purposes of this information matrix creation is to use the number or the error rate of the encoded, replicated, permuted or scrambled messages to determine the authenticity of a brand of the information matrix. and therefore the document that carries it.
- the passage of the scrambled coded message to the information matrix that represents it is nothing but a modulation of the message, this modulation being defined as the process by which the message is transformed from its original form into a form. suitable for transmission on a channel.
- This communication channel the information transmission medium that connects the source to the recipient and allows the routing of the message, differs depending on whether the captured information matrix is a captured original information matrix or an information matrix. copied captured.
- the communication channel can vary: one distinguishes the "communication channel of an original" and the "communication channel of a copy”. This difference can be measured in terms of signal / noise ratio, this ratio being lower for a captured copied information matrix.
- the coded message extracted from a captured copied information matrix will have more errors than the encoded message extracted from an original captured information matrix.
- the number or rate of errors detected are, in accordance with some aspects of the present invention, used to differentiate a copy of an original.
- each subchannel of the signal transmission channel i.e. the information matrix
- each subchannel of the signal transmission channel is an analog-to-digital or digital-to-analog transformation.
- the logic diagram illustrated in FIG. 5 exposes various steps for generating an information and marking matrix of a document, according to a particular embodiment of certain aspects of the method that is the subject of the present invention.
- the encryption generally operates on blocks of bits, of fixed size, for example 64 bits or 128 bits.
- the encryption algorithm DES (acronym for "standard data encryption” for standard data encryption) with a 56-bit key and a 64-bit message block size, the triple-DES, with a 168-bit key and a 64-bit message block size, and AES (advanced encryption standard), with a 128, 128 or 256-bit key and a 128-bit message block size , can be used because they are widely used, and recognized as being resistant to attack.
- many other block or sequential encryption algorithms can also be used.
- the block cipher algorithms provide, in principle, encrypted messages of equal size to the initial message, provided that it is a multiple of the block size.
- this encoded encrypted message is then written in binary alphabet, that is to say that it is composed of "0" and "1".
- Each of the binary data of the scrambled replicated encoded encrypted message is thus modulated in a cell of the information matrix by assigning one of two colors (eg black and white) to the binary data "0" and the other of these colors to a binary "1", the correspondence may vary on the surface of the image.
- two colors eg black and white
- this MIS contains errors.
- the errors in question, implemented in the present invention are not artificially induced, but caused in a natural way. Indeed, the errors considered are caused, randomly and naturally, during the marking step, by printing the M IS at a sufficiently high resolution.
- the print resolution of an MIS can not vary. Indeed, the majority of printing means print in binary (presence or absence of an ink dot) at a fixed resolution, and the gray or color levels are simulated by the different techniques of dithering. In the case of offset printing, this "native" resolution is determined by the resolution of the plate, which is, for example, 2,400 dots / inch (2,400 dpi). Thus, a gray-scale image to be printed at 300 pixels / inch (300 ppi) would actually be printed in binary at 2,400 dpi, each pixel corresponding to approximately 8 x 8 points of the frame.
- a cell can be represented by a square block of 1 x 1, 2 x 2, 3 x 3, 4 x 4 or 5 x 5 pixels (non-square blocks are also possible), corresponding to resolutions of, respectively, 2,400, 1,200, 800, 600 and 480 cells / inch.
- an MIS can be authenticated without the need to know, directly or indirectly, the messages needed for its design. You just have to know the groups of cells that share common properties.
- a M IS consisting of 12,100 pixels, which is a square of 1 10 x 1 10 pixels.
- These 12,100 pixels can be divided into 1 1 0 subsets of 1 1 0 pixels each, so that each pixel is in exactly one subset.
- the division of the pixels into subsets is done in a pseudo-random manner, preferentially using a cryptographic key, so that it is not possible without the key to know the positions of the different pixels belonging to a subset.
- the image can be a simple square, increased by a black border facilitating its detection, or can have an arbitrary shape, contain microtext, etc. Groups of pixels with known values for accurate image alignment can also be used.
- the image is marked to optimize its degree of degradation, depending on the quality of marking, itself dependent on the quality of the substrate, the accuracy of the marking machine and its settings. Methods are given above for this purpose.
- the score (score" meaning both an error rate or a similarity) found is then compared to a threshold to determine whether the captured image corresponds to an original or a copy. Standard statistical methods can be used to determine this threshold.
- the described procedure does not use external data to the image, in addition to the composition of the subsets, to determine a score. Thus, one can express the count of the amount of error as well.
- the biometric data encoding means 1 is configured to encode the photograph to form the identification image and, optionally, to encode the image of the fingerprint or its characteristic elements, called "minutiae”.
- the biometric data encoding means 1 is configured to encode the biometric data into at least one hundred thousand elementary cells. Thus, a compressed photograph in four kilobytes can be represented with several redundancies. This photograph can be very precise.
- the means for encoding an authentication image is configured to encode at least one document holder identification information in the authentication image.
- the authentication code which can not be falsified, identifies the holder of the document, even if the identification image has been falsified.
- a coding step 225 for forming an authentication image of the document said authentication image presenting elementary cells
- FIG. 3 shows the method 50 of verifying the authenticity of an identity and identity document of a person or an animal.
- the method 50 comprises:
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Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1259876A FR2996943B1 (fr) | 2012-10-16 | 2012-10-16 | Procedes, dispositifs et document d'identification d'une personne ou d'un animal |
PCT/FR2013/052473 WO2014060700A1 (fr) | 2012-10-16 | 2013-10-16 | Procédés, dispositifs et document d'identification d'une personne ou d'un animal |
Publications (1)
Publication Number | Publication Date |
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EP2909817A1 true EP2909817A1 (fr) | 2015-08-26 |
Family
ID=47557249
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13789856.5A Withdrawn EP2909817A1 (fr) | 2012-10-16 | 2013-10-16 | Procédés, dispositifs et document d'identification d'une personne ou d'un animal |
Country Status (4)
Country | Link |
---|---|
US (1) | US10112431B2 (fr) |
EP (1) | EP2909817A1 (fr) |
FR (1) | FR2996943B1 (fr) |
WO (1) | WO2014060700A1 (fr) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015067725A1 (fr) | 2013-11-07 | 2015-05-14 | Scantrust Sa | Code à barres bidimensionnel et son procédé d'authentification |
US20150332613A1 (en) * | 2014-05-15 | 2015-11-19 | Smartwater Ltd | Security marker |
FR3030824B1 (fr) * | 2014-12-17 | 2018-01-26 | Advanced Track & Trace | Procede et dispositif de securisation d'un objet, procede et dispositif de controle leur correspondant, et objet securise |
ES2885874T3 (es) | 2017-09-26 | 2021-12-15 | Thales Dis France Sa | Procedimiento de generación de patrones de guilloche variables, dispositivo de implementación y documento de identidad que comprende tales patrones |
EP3459755A1 (fr) | 2017-09-26 | 2019-03-27 | Gemalto Sa | Procédé d'insertion de motifs guillochés, procédé d'extraction de motifs guillochés, procédé d'authentification de ces motifs guillochés et dispositifs de mise en oeuvre |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
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US20080149713A1 (en) * | 2003-08-13 | 2008-06-26 | Brundage Trent J | Detecting Media Areas Likely of Hosting Watermarks |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
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US7515733B2 (en) * | 1993-11-18 | 2009-04-07 | Digimarc Corporation | Methods and arrangements employing digital content items |
US5974150A (en) * | 1997-09-30 | 1999-10-26 | Tracer Detection Technology Corp. | System and method for authentication of goods |
FR2776153B1 (fr) * | 1998-03-10 | 2000-07-28 | Ordicam Rech Et Dev | Procede pour l'identification securitaire d'une personne et dispositif portatif pour la mise en oeuvre du procede |
DE69937972T2 (de) * | 1998-11-19 | 2009-01-08 | Digimarc Corp., Beaverton | Ausweisdokument mit Photo |
EP1236181B1 (fr) * | 1999-12-07 | 2006-08-02 | Sun Microsystems Inc. | Dispositif d'identification et de transport de photographies securise, moyens et procedes destines a authentifier un tel dispositif |
FR2831976A1 (fr) * | 2001-11-06 | 2003-05-09 | D Vito Antoine Orazio | Support d'authentification individuelle par approche biometrique dans un systeme de transmission d'information sans contact |
FR2916678B1 (fr) | 2007-06-01 | 2021-07-16 | Advanced Track & Trace | Procede et dispositif de securisation de documents |
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2012
- 2012-10-16 FR FR1259876A patent/FR2996943B1/fr not_active Expired - Fee Related
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2013
- 2013-10-16 EP EP13789856.5A patent/EP2909817A1/fr not_active Withdrawn
- 2013-10-16 WO PCT/FR2013/052473 patent/WO2014060700A1/fr active Application Filing
- 2013-10-16 US US14/436,460 patent/US10112431B2/en active Active
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080149713A1 (en) * | 2003-08-13 | 2008-06-26 | Brundage Trent J | Detecting Media Areas Likely of Hosting Watermarks |
Also Published As
Publication number | Publication date |
---|---|
FR2996943A1 (fr) | 2014-04-18 |
US20150266331A1 (en) | 2015-09-24 |
WO2014060700A1 (fr) | 2014-04-24 |
FR2996943B1 (fr) | 2015-12-25 |
US10112431B2 (en) | 2018-10-30 |
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