The method (100) for securing an object comprises:
a step of encoding a first message (301) in a two-dimensional barcode (303), the first message comprising at least a header identifying a certification resource and a signature produced by means of this resource;
a step of generating a fragile anti-copy mark (304) encoding a second message (302) representative of the signature produced, the second message comprising redundancies; and
a step of marking the object with the first 2D barcode and the fragile anti-copy mark.
H04L 9/32 - Arrangements for secret or secure communicationsNetwork security protocols including means for verifying the identity or authority of a user of the system
G06K 19/06 - Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
A method (30) for securing a document, which comprises:
a step (301) of statistically determining the average magnitude of an unpredictable print variation;
a step (302) of generating a message representative of at least one predefined print variation rate;
a step (307) of encoding the message in a 2D barcode comprising a plurality of cells, the cells comprising two areas:
a first area representing a symbol and
a second area, representing a matrix of dots of dimensions smaller than the dimensions of the second area and having at least one geometric characteristic similar to the amplitude of the statistically determined unpredictable print variation; and
a step (310) of printing the document with the barcode, the print causing the unpredictable variation.
G06K 19/06 - Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
3.
METHOD AND DEVICE FOR REMOTELY SIGNING AND CERTIFYING A PERSON'S IDENTIFICATION DATA
The method (10) for the remote signature and certification of a person's identification data, comprises:
by a communicating mobile terminal:
a step (12, 14) of reading a machine-readable zone, in an official document, a zone reserved for the reading, identification and validation of this document,
a step (16) of reading, in a memory of this official document, a photograph and a signature of said photograph, and
a step (20, 22) of transmitting the photograph and the signature of the photograph to a remote server; and
by the remote server:
a step (26) of calculating a facial recognition template from the photograph.
G06F 21/32 - User authentication using biometric data, e.g. fingerprints, iris scans or voiceprints
G06K 19/06 - Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
4.
Method and device for accessing a web page and method and device for generating a graphic code for accessing a web page
G06K 9/36 - Image preprocessing, i.e. processing the image information without deciding about the identity of the image
G06F 16/955 - Retrieval from the web using information identifiers, e.g. uniform resource locators [URL]
G06K 7/14 - Methods or arrangements for sensing record carriers by electromagnetic radiation, e.g. optical sensingMethods or arrangements for sensing record carriers by corpuscular radiation using light without selection of wavelength, e.g. sensing reflected white light
5.
SECURE MARKING METHOD AND DEVICE AND AUTHENTICATION METHOD AND DEVICE
A method for securely marking an object, comprising: - a step of determining a maximum cell size (302) of a two-dimensional barcode (301), the cell size being defined by an area containing a number of pixels (304, 305), - a step of estimating a minimum number of pixels of a predetermined colour referred to as the "main colour" in a cell such that the cell is detected as being said colour by a predetermined reader, - a step of encoding a message in cells of a two-dimensional barcode by defining the main colour of each cell, said message representing at least one instance of access to a remote resource, - for at least one cell, a step of defining an image (306) to be represented in the cell, the number of pixels in the colour image defining the cell being greater than the estimated minimum number and - a step of marking the object with the secure two-dimensional barcode.
G06K 7/14 - Methods or arrangements for sensing record carriers by electromagnetic radiation, e.g. optical sensingMethods or arrangements for sensing record carriers by corpuscular radiation using light without selection of wavelength, e.g. sensing reflected white light
G06K 19/06 - Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
6.
METHOD AND DEVICE FOR SECURING AN OBJECT AND METHOD FOR AUTHENTICATING AN OBJECT
The method (100) for securing an object comprises: - a step of encoding a first message (301) in a two-dimensional barcode (303), the first message comprising at least one header identifying a certification resource and a signature produced by means of the resource, - a step of generating a fragile anti-copy mark (304) encoding a second message (302) representative of the produced signature, the second message comprising redundancies and - a step of marking the object with the first two-dimensional barcode and the fragile anti-copy mark.
The device (100) for protecting a document (125) comprises: —a means (120) for inputting a digital file representing an image of at least a part of the document, —a means (135) of extracting characteristic elements of the image and of positions of said characteristic elements on the document, —a means (140) of encoding characteristic elements of the image and data representative of position of said characteristic elements on the document, and to a matrix code and—a means (155) of printing the matrix code on or in said document. In embodiments, the device comprises: —a means (165) of determining a location of the document not bearing any information, and/or—a means (165) of determining the shape of the matrix code corresponding to the location of the document not bearing information, the printing means printing the matrix code at the determined location and according to the determined shape.
G06F 21/64 - Protecting data integrity, e.g. using checksums, certificates or signatures
G06K 7/14 - Methods or arrangements for sensing record carriers by electromagnetic radiation, e.g. optical sensingMethods or arrangements for sensing record carriers by corpuscular radiation using light without selection of wavelength, e.g. sensing reflected white light
G06K 9/00 - Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints
8.
Method for website authentication and for securing access to a website
H04L 29/06 - Communication control; Communication processing characterised by a protocol
H04L 9/32 - Arrangements for secret or secure communicationsNetwork security protocols including means for verifying the identity or authority of a user of the system
G06F 21/34 - User authentication involving the use of external additional devices, e.g. dongles or smart cards
G06F 21/36 - User authentication by graphic or iconic representation
9.
METHOD AND DEVICE FOR SECURING A DOCUMENT, METHOD AND DEVICE FOR CONTROL CORRESPONDING THERETO AND SECURE DOCUMENT
The device (100) for securing a document (125) comprises: - a means (120) for inputting a digital file representing an image of at least a part of the document, - a means (135) of extracting elements characteristic of the image and of positions of said characteristic elements on the document, - a means (140) of coding characteristic elements of the image and data representative of position of said characteristic elements on the document, and to a matrix code and - a means (155) of printing the matrix code on or in said document. In embodiments, the device comprises: - a means (165) of determining a location of the document not bearing any information, and/or - a means (165) of determining the form of the matrix code corresponding to the location of the document not bearing information, the printing means printing the matrix code at the determined location and according to the determined form.
The invention relates to a method for securing access to a website which includes, in series: a step (202) of a first user terminal accessing said site; a step (206) of entering a message with the user terminal on a page of the site; a step (208) of transmitting the message to a server of the website; a step (210) of the server of the website encrypting the message in order to form a visible code; a step (212) of displaying the visible code on a display screen of the first user terminal; a step (216) of taking an image of the visible code using a second user terminal, optionally identical to the first user terminal; a step (218) of decrypting the code using the second user terminal; and a step (220) of providing the user with the message decrypted by the second user terminal.
A method of marking a holographic matrix. The method includes forming the holographic matrix, which is designed to produce holograms by printing. At least one anti-copy mark on the holographic matrix is formed and at least one copy-robust mark on the holographic matrix is formed. At least one of the steps for forming at least one mark on the holographic matrix uses laser-structuring of the holographic matrix surface. Preferably, the anti-copy mark represents a message and a plurality of redundancies of the message carried by the anti-copy mark. Also, preferably, a picosecond laser is used to form the anti-copy mark is formed.
B42D 25/41 - Marking using electromagnetic radiation
B42D 25/425 - Marking by deformation, e.g. embossing
G07D 7/00 - Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
G07D 7/2033 - Matching unique patterns, i.e. patterns that are unique to each individual paper
G06K 19/16 - Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code using markings of different kinds in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means at least one kind of marking being used for authentication, e.g. of credit or identity cards the marking being sensed by radiation the marking being a hologram or diffraction grating
G07D 7/0047 - Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using digital security elements, e.g. information coded on a magnetic thread or strip using checkcodes, e.g. coded numbers derived from serial number and denomination
A method of integrating a mark in a document. A frame to be printed is selected. At least one color of the selected frame is selected. A color density for each selected color for the selected frame is determined. A digital code is selected for each selected color. After printing, the digital code includes the density of the color. and is integrated into the frame of the corresponding color. The frame including the digital code is printed. Preferably, the digital code is a digital anti-copy mark designed to form, following the printing step, a printed anti-copy mark with an error rate of more than five percent.
G07D 7/005 - Testing security markings invisible to the naked eye, e.g. verifying thickened lines or unobtrusive markings or alterations
G07D 7/2033 - Matching unique patterns, i.e. patterns that are unique to each individual paper
G06K 19/06 - Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
G06K 19/10 - Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code using markings of different kinds in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means at least one kind of marking being used for authentication, e.g. of credit or identity cards
G06K 1/12 - Methods or arrangements for marking the record carrier in digital fashion otherwise than by punching
The method of certifying integrity of content of a closed volume comprises:- a step (212, 214, 216) of capturing an image of the content of the closed volume; - a step (218, 220) of determining a signature of the content by processing the image captured; - a step (222, 224) of determining values of a matrix of cells, the values represented in the cells being representative of the signature of the content; and - a step (226) of marking at least one wall of the closed volume with said matrix of cells. In the course of marking step (226), the matrix of cells is marked on at least one second exterior surface of a second wall of the closed volume which is different from the first wall and/or on a transport document.
G06K 17/00 - Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups , e.g. automatic card files incorporating conveying and reading operations
G06K 7/10 - Methods or arrangements for sensing record carriers by electromagnetic radiation, e.g. optical sensingMethods or arrangements for sensing record carriers by corpuscular radiation
14.
Methods, devices and identification document for a person or an animal
A device for producing a document carrying the identification of a person/animal. A first detector to determine the printing conditions of the document. A sensor to obtain the biometric data of the person/animal. A first encoder encodes the biometric data to form a digital identification image including redundancies. A second detector to determine physical characteristics of cells of at least one shape, such that the proportion of cells printed with a print error results from unanticipated unknowns in printing. A second encoder to form, within the shape, an authentication image for authenticating the document and includes elementary cells representing the encoded authentication image. A printer to print the authentication and identification images on the document, and to generate random errors in the printed elementary cells of the authentication image to detect modification to the appearance of the elementary cells.
The invention relates to a method of integrating a mark in a document, the method comprising the following steps: selecting a frame to be printed; selecting at least one colour of the frame selected; determining a colour density for each colour selected for the frame selected; for each colour selected, determining a digital code comprising, after printing, the density of the colour; integrating the digital code into the frame of the corresponding colour; and printing the frame comprising the code. In the embodiments, the digital code is a digital anti-copy mark designed to form, following the printing step, a printed anti-copy mark with an error rate of more than five per cent.
G06K 1/12 - Methods or arrangements for marking the record carrier in digital fashion otherwise than by punching
G06K 19/06 - Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
The invention relates to a method for rendering access to a website secure, the method comprising the following steps: accessing (132) the site via a user terminal; determining (134) values of parameters of the server accommodating the site, the parameters varying between two accesses to the site and the step being performed by the server; determining (140), by the user terminal, parameter values of the terminal or nodes or components of the network separating the server and the terminal; forming (142) a logo according to the parameter values; and displaying (144) the logo on the user terminal.
The invention relates to a method of authenticating the carrier of a card (74) bearing identification data, the card comprising a transparent window (76) of which the dimensions are larger than that of a fingerprint (80), the method involving the following steps: taking (86) at least one first image of a fingerprint through said window with a user's finger pressed against the window; taking (90) at least one second image of a fingerprint trace through the window when the user's finger has moved away from the window; detecting (92) unique points of the fingerprint and of the trace; and checking (96) that the unique points of the fingerprint correspond to the unique points of the fingerprint trace.
The invention relates to a method of marking a holographic matrix, the method comprising the following steps: forming the holographic matrix, which is designed to produce holograms by printing; forming at least one anti-copy mark on the holographic matrix; and forming at least one copy-robust mark on the holographic matrix; at least one of the steps for forming at least one mark on the holographic matrix using laser-structuring of the holographic matrix surface. In the embodiments: the anti-copy mark represents a message and a plurality of redundancies of the message carried by the anti-copy mark and/or a picosecond laser is used during the step in which the anti-copy mark is formed.
The invention relates to a method for identifying an object, the method comprising the following steps: forming a nanostructure on the object by means of a laser source; capturing an image of at least part of the nanostructure; processing the image in order to extract unique points of the nanostructure; and storing information representative of the position of the unique points. In the embodiments: during the image-processing step, software is run for extracting unique points of fingerprints - the unique points comprising minutiae - and/or during the nanostructure-formation step, a laser is used of which the pulse duration is between one tenth and ten picoseconds.
The object (10) has: a first surface (14) at least one zone of which bears a first grating (13) configured to polarise light; and a second surface (16), separate from the first surface and not contained in the same plane as the first surface, at least one zone of which bears a second grating (15) configured to polarise light, at least one of said zones bearing a nanostructure having a periodic structure having a period between about one hundred and one thousand nanometres, which structure is produced by a laser beam, said nanostructure forming one of said gratings or decreasing the polarisation of one of said gratings. In embodiments: said nanostructure forms one of said gratings for polarising light; or said nanostructure decreases the polarisation of one of said gratings.
G06K 19/06 - Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
G06K 19/10 - Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code using markings of different kinds in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means at least one kind of marking being used for authentication, e.g. of credit or identity cards
G06K 19/16 - Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code using markings of different kinds in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means at least one kind of marking being used for authentication, e.g. of credit or identity cards the marking being sensed by radiation the marking being a hologram or diffraction grating
21.
METHOD AND DEVICE FOR PROTECTING AN OBJECT, CORRESPONDING CONTROL METHOD AND DEVICE AND PROTECTED OBJECT
The invention relates to a device (100) for protecting an object (125), which comprises: a means (110, 120) for inputting a digital file representing a photograph that represents at least one part of the object; a means (135, 140) for encoding characteristic elements of the photograph into a matrix code (130) and a means (155) for printing the matrix code on or in said object. In certain embodiments, the photograph represents biometric data of a person, which are also visible on the object. In certain embodiments, the means for entering the digital file representing a photograph comprises an image sensor (120) configured to take an image of the object on which the matrix code is printed.
G06K 19/06 - Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
G07F 7/08 - Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus by coded identity card or credit card
22.
METHOD AND DEVICE FOR PROTECTING ACCESS TO A MESSAGE
The invention relates to a device for reading a message which comprises: a means for reading biometric data of a holder of the medium; a means for capturing, on a medium, an encoded message comprising elementary message units, said message having noise that consists of marking defects of the message on said medium which are random and unpredictable for each elementary message unit; a means for reducing the noise of the captured message, based on biometric data; and a means for decoding at least one portion of the message in which the noise has been at least partially removed. In certain embodiments, the decoding means uses redundancies of the message with the noise removed to determine at least one portion of the encoded message.
G06K 19/06 - Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
23.
DEVICE AND METHOD FOR AUTHENTICATING CONTENT IN A CLOSED CONTAINER
The invention relates to a device (20) for authenticating content in a closed container (240) that is at least partially transparent for a light having a wavelength of 350 nanometers to 1000 nanometers, comprising: a means (205) for storing the measurement of the fluorescence spectrum of the content when the content is exposed to radiation with a wavelength between 350 and 1000 nm; a container support (245); at least two light sources each configured for sequentially emitting light radiation between 350 and 1000 nm in the direction of the container; at least one means (220) for optically concentrating the radiation emitted by one of the light sources; at least one means (225, 226) for collecting the light emitted by the content; at least one means (230) for determining the fluorescence spectrum emitted by the content; a means (232) for compensating for the absorption, by the container, of the light from the fluorescence; and a means (235) for identifying the nature of the content, by comparing the fluorescence spectrum determined during a step for the compensated determination of the absorption by the container and at least one spectrum stored by the storage means.
The invention relates to a device (10) for producing a document (40) carrying the identification of a person or an animal, said device comprising: a means (190) for determining printing conditions of said document; a means (105) for obtaining the biometric data of said person or said animal; a means (110) for encoding the biometric data in order to form a digital identification image comprising redundancies; a means (195) for determining physical characteristics of cells of at least one form, according to the printing conditions, in such a way that the proportion of cells printed with a printing error resulting exclusively from printing problems is higher than a first predetermined value and lower than a second predetermined value; an encoding means (115) for forming, within said form, an image for the authentication of said document, said authentication image comprising elementary cells, the content of which represents the encoded authentication image; and a means (120) for printing the authentication image and the identification image on the document, implementing said printing conditions, in order to generate random errors in the printed elementary cells of the authentication image, said form being suitable for allowing the detection of a copy modifying the appearance of a plurality of said elementary cells.
The invention relates to a device (130) for authenticating a cover (105) of a container (110), which comprises: the container cover comprising a lower area (115) secured to the container, a central upper area (120) and an intermediate opening area (125) between the lower area and the upper area, and a label (135) placed, inside the cover, in the intermediate opening area, said label bearing a first code (145, 150) and being secured to said cover. In the embodiments, the first code comprises: an anti-copy code (145) comprising basic cells, the initial impression of which causes an error rate on the basic cells that is equal to at least 2 %,and a code (150) in two dimensions giving access to content accessible on a telecommunication network. In the embodiments, the device comprises in addition a second code (165) outside the cover that corresponds, within a computer memory (160), to a first code.
A planar sheet comprising, on a first surface of the sheet, at least one printed mark, and on a second surface of the sheet, opposite the first surface, at least one invisible printed mark vertically adjacent to the mark printed on the first surface. In at least one pair of vertically adjacent marks formed on the opposite surfaces, at least one of the marks of the pair has unique content. At least one invisible mark can be a two-dimensional barcode and/or at least one invisible mark can be a copy-protection mark. The content of at least one mark can be representative of the position of an invisible mark on the sheet.
G06K 19/06 - Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
G07D 7/00 - Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
a step of memorizing an item of information representing the image of the robust mark, the sensitive mark and the other image part. In embodiments, during at least one forming step, the position of the mark formed during this forming step is random in relation to the other image part.
G06F 17/00 - Digital computing or data processing equipment or methods, specially adapted for specific functions
G07D 7/00 - Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
G06K 7/10 - Methods or arrangements for sensing record carriers by electromagnetic radiation, e.g. optical sensingMethods or arrangements for sensing record carriers by corpuscular radiation
G06K 9/00 - Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints
G06F 17/30 - Information retrieval; Database structures therefor
G06K 7/14 - Methods or arrangements for sensing record carriers by electromagnetic radiation, e.g. optical sensingMethods or arrangements for sensing record carriers by corpuscular radiation using light without selection of wavelength, e.g. sensing reflected white light
G06K 5/00 - Methods or arrangements for verifying the correctness of markings on a record carrierColumn-detection devices
G06K 9/62 - Methods or arrangements for recognition using electronic means
The invention relates to a method for authenticating a tag, comprising: a step (205) of a communicating mobile terminal recording an image of at least a portion of a tag comprising at least a portion of an identifier; a step (210) of transmitting said identifier to a server; a step (215) of reading, from a memory of images of tags, the image of a tag having said identifier; a step (220) of transmitting, to said communicating mobile terminal, at least a portion of the image read from the memory; and a step (230) of displaying at least a portion of the transmitted image superimposed on an image recorded by said terminal.
The product marking method comprises: a step of forming, on or in said product, a copy-robust mark with a first resolution; a step of forming, on or in said product, a copy-fragile mark, with a second resolution greater than the first resolution; a step of capturing an image of said robust mark, of said fragile mark and of another portion of the product; and a step of storing information representative of the image of said robust mark, of said fragile mark and of said other portion. In certain embodiments, during at least one forming step, the position of the mark formed during this forming step, relative to the other image portion, is random.
G07D 7/00 - Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
a step (260, 335, 440) of determining the physical characteristic based on the second image. In some embodiments, there is, in addition, a step of marking the object with a mark bearing information representative of at least a portion of the physical characteristic.
G06K 9/36 - Image preprocessing, i.e. processing the image information without deciding about the identity of the image
G06K 9/32 - Aligning or centering of the image pick-up or image-field
G06K 9/00 - Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints
G06K 9/68 - Methods or arrangements for recognition using electronic means using sequential comparisons of the image signals with a plurality of reference, e.g. addressable memory
G07D 7/12 - Visible light, infrared or ultraviolet radiation
The invention relates to a planar document (100) which comprises: on a first surface (105) of the document, at least one printed mark (110, 115, 120, 125, 130); on a second surface of the document, opposite said first surface, at least one invisible printed mark vertically adjacent to a mark (120, 125) printed on said first surface. In at least one couple of vertically adjacent marks formed on said opposing surfaces, at least one of the marks of said couple has unique content. In certain embodiments of the invention, at least one so-called invisible mark is a two-dimensional barcode and/or at least one so-called invisible mark is a copy-protection mark. According to certain embodiments of the invention, the contents of at least one mark (110) show the position of an invisible mark on the document.
G07D 7/00 - Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
The method of reading a physical characteristic on an object comprises: a step (240, 315, 405) of capturing a first image of at least one part of said object, with a first resolution, a step (245, 320, 415, 420) of determining the position of a zone of the object to be processed, as a function of said first image, a step (255, 330, 430) of capturing a second image of said zone of the object to be processed, with a second resolution higher than said first resolution and a step (260, 335, 440) of determining said physical characteristic as a function of said second image. In some embodiments, there is carried out, moreover, a step of marking the object with a mark bearing information representative of at least one part of said physical characteristic.
G06K 9/32 - Aligning or centering of the image pick-up or image-field
G06K 9/68 - Methods or arrangements for recognition using electronic means using sequential comparisons of the image signals with a plurality of reference, e.g. addressable memory
34.
METHOD AND DEVICE FOR IDENTIFYING A DOCUMENT PRINTING PLATE
The method for identifying a document printing plate comprises: a step of printing at least one document with said plate; a step of capturing, at a high-resolution, at least one image from at least one portion of a so-called document; a step of extracting a geometric feature from at least one captured image; a step of storing the extracted geometric feature for a candidate document for which an attempt is made to determine if said printing plate was used for the printing thereof; a step of capturing, at a high-resolution, an image of the portion of said candidate document corresponding to the document portion for which a geometric feature was stored; a step of extracting the geometric feature of the image of said candidate document corresponding to the stored geometric feature; and a step of determining if a measurement of correlations for said candidate document and the stored geometric feature is greater than a predetermined limit value.
The invention relates to a method for marking a surface with controlled periodic nanostructures, that comprises: a step (500) of encoding information in the form of an image including values representative of the encoded information, and a step (506-514) of point-by-point marking an area of said surface with a polarised laser beam in order to form oriented nanostructures on or in said surface by modulating the polarisation of the laser beam for each marking point based on the value of a point of said image. In some embodiments, during the marking step, the method comprises using a pulsed laser with durations lower than 10x10-12 second and a polarisation means of the light emitted from said laser source and reaching said surface, adapted for polarising the light along a variable polarisation axis based on a signal received by said polarisation means.
B82B 3/00 - Manufacture or treatment of nanostructures by manipulation of individual atoms or molecules, or limited collections of atoms or molecules as discrete units
G06K 7/12 - Methods or arrangements for sensing record carriers by electromagnetic radiation, e.g. optical sensingMethods or arrangements for sensing record carriers by corpuscular radiation using a selected wavelength, e.g. to sense red marks and ignore blue marks
G06K 19/06 - Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
B23K 26/06 - Shaping the laser beam, e.g. by masks or multi-focusing
The invention relates to a method for securing documents that comprises the step of printing a distribution of points on said document, said printing inducing due to printing randomness a point-by-point unpredictable variation of at least one geometrical variation of the printed points and, before said printing step, the step of generating said point distribution so that the points of said distribution have at least one variable geometrical characteristic between them, the geometrical amplitude of the variation generated having the same magnitude as said unpredictable variation. In some embodiments, during the generation step and in said point distribution, at least one half of the points of said distribution are not laterally juxtaposed to four other points of said point distribution, and at least one dimension of at least a portion of the points of said point distribution has the same magnitude as the average of the absolute value of said unpredictable variation.
G06K 19/06 - Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
G03G 21/04 - Preventing copies being made of an original
The method of the invention comprises : a step of determining characteristics of the printing hardware of said original document; a step of determining a mark for differentiating an original from a copy based on the characteristics of the printing hardware to be used for printing said mark on said document; a step of printing said mark using said printing hardware in order to create said original document; and a step of determining a first boundary value to be used by a copy detection hardware for discriminating the original document from a copy of the original document based at least on a print of said mark. In some embodiments, the method comprises the step of printing at least one printing reference representative of a maximal or minimal authorised inking for the printing of said document and, during the step for determining a first boundary value, determining a measure on at least said one printing reference and adding a tolerance thereto.
The method for marking materials comprises: a step (210) for generation of a code, a step (215) for random selection of at least one zone of said material and a step (220) for marking the surface or the core of each zone of the material with a laser beam to represent the code thereon in a manner imperceptible to the naked eye. The random selection step of at least one zone of the material is preferably carried out for each piece of material to be marked. During the step of generation of a code, a two-dimensional barcode is preferably generated and during the marking step, the barcode is represented in two dimensions. According to some embodiments, the method further comprises a step of marking the material in a manner visible to the naked eye, a random selection is made of at least one part of a mark visible to the naked eye and/or said visible mark comprises information relating to the position of at least one zone in which the code imperceptible to the naked eye is represented.
The method for securing a document comprises the following steps: a step of determining the printing conditions of said document; a step of determining the physical characteristics of cells of at least one form depending on the printing conditions such that the proportion of printed cells showing a printing error which is solely due to printing irregularities is higher than a first predetermined value and lower than a second predetermined value; a step of representing an information by varying the appearance of cells which have said physical characteristics and a step of printing said form by applying said printing conditions, wherein said form is adapted for allowing for the detection of a copy which modifies the appearance of a plurality of said cells.
The invention concerns an authenticating method including: a step of generating a random number (105); a step of generating a timestamping (115); a step of generating a first secret key (120); a step of truncating a message authentication code using said first secret key (125); a step of symmetrically encrypting the random number, the timestamping and the truncation (135), using a second secret key (130) to produce an authentication code (145). Preferably, during the step of generating the random number, a quantum generator (100) is used. Preferably, during the truncating step, a cryptographic message authenticator is generated using the first secret key. Preferably, during the step of symmetrically encrypting the random secret key, using the second secret key, a message digest (140) is additionally produced.
H04L 9/32 - Arrangements for secret or secure communicationsNetwork security protocols including means for verifying the identity or authority of a user of the system
G03H 1/00 - Holographic processes or apparatus using light, infrared, or ultraviolet waves for obtaining holograms or for obtaining an image from themDetails peculiar thereto
G06K 1/12 - Methods or arrangements for marking the record carrier in digital fashion otherwise than by punching
G06K 9/76 - Arrangements for recognition using optical reference masks using holographic masks
G06K 19/10 - Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code using markings of different kinds in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means at least one kind of marking being used for authentication, e.g. of credit or identity cards
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