Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: A device for reading a message includes a reader to read biometric data of a holder of the medium and a scanner to capture, on a medium, an encoded message having elementary message units. The message includes a noise that consists of marking defects of the message on the medium which are random and unpredictable for each elementary message unit. A noise reducer to reduce the noise of the captured message based on biometric data. A decoder to decode at least one portion of the message in which the noise has been at least partially removed. Preferably, the decoder utilizes redundancies of the message with the noise removed to determine at least one portion of the encoded message.

Abstract: A method for authenticating a tag, includes: a step (205) of capturing an image, with a communicating mobile terminal, of at least a portion of a tag having at least a portion of an identifier; a step (210) of transmitting the identifier to a server; a step (215) of reading, from a memory of tag images, the image of a tag having the identifier; a step (220) of transmitting, to the 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 captured by the terminal.

Abstract: 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 per cent.

Abstract: A device for reading a message includes a reader to read biometric data of a holder of the medium and a scanner to capture, on a medium, an encoded message having elementary message units. The message includes a noise that consists of marking defects of the message on the medium which are random and unpredictable for each elementary message unit. A noise reducer to reduce the noise of the captured message based on biometric data. A decoder to decode at least one portion of the message in which the noise has been at least partially removed. Preferably, the decoder utilizes redundancies of the message with the noise removed to determine at least one portion of the encoded message.

Abstract: 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.

Abstract: A method for reading a physical characteristic on an object includes: a step (240, 315, 405) of capturing a first image of at least a portion of the object with a first resolution; a step (245, 320, 415, 420) of determining the position of an area of the object to be processed, according to the first image; a step (255, 330, 430) of capturing a second image of the area of the object to be processed, with a second resolution higher than the first resolution; and 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.

Abstract: 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.

Abstract: The method for marking a product includes: a step of forming, on or in the product, a mark robust to copying, with a first resolution, a step of forming, on or in the product, a mark sensitive to copying, with a second resolution higher than the first resolution, a step of capturing an image of the robust mark, the sensitive mark and another part of the product and 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.

Abstract: An analogical mark printed on a document that includes a distribution of dots defined by a digital file, having, as a result of unanticipated unknowns in printing, an unpredictable variation, dot by dot, of at least one geometric characteristic of the printed dots where dots of the distribution of dots have, in the digital file, at least one geometric characteristic that digitally varies among dots, the geometric amplitude of the digital variation having the order of magnitude of said unpredictable variation and being less than an average dimension of the dots of the distribution of dots.

Abstract: A document securization method includes: a first step of forming a first mark (205, 210) on a first surface of a document by utilizing a first marking element, a second step of forming a second mark (215) on another surface of the document or in the depth of the document by utilizing a second marking element, the two marks are superimposed when the document is illuminated by back-lighting and at least one (215) of the marks is a mark whose copy, made using marking elements identical to those utilized for forming the mark, causes an error rate, measured dot by dot, that is greater than a predefined value.

Abstract: The method for authenticating a code with geometric areas whose shapes and/or colors vary according to a message includes: a step (115) in which the code with variable geometric areas is generated, according to a message, to provide geometric areas; a step (120 to 130) in which a digital authentication code is generated to provide numeric values and a step (135) in which an image of the geometric code areas is formed, including a part of the digital authentication code in at least some of its geometric areas and/or in at least one space between geometric areas.

Abstract: The method for authenticating a code with geometric areas whose shapes and/or colors vary according to a message includes: a step (115) in which the code with variable geometric areas is generated, according to a message, to provide geometric areas; a step (120 to 130) in which a digital authentication code is generated to provide numeric values and a step (135) in which an image of the geometric code areas is formed, including a part of the digital authentication code in at least some of its geometric areas and/or in at least one space between geometric areas.

Abstract: An analogical mark printed on a document that includes a distribution of dots defined by a digital file, having, as a result of unanticipated unknowns in printing, an unpredictable variation, dot by dot, of at least one geometric characteristic of the printed dots where dots of the distribution of dots have, in the digital file, at least one geometric characteristic that digitally varies among dots, the geometric amplitude of the digital variation having the order of magnitude of said unpredictable variation and being less than an average dimension of the dots of the distribution of dots.

Abstract: A process for securing a document including a step of printing a distribution of dots on said document, said printing, as a result of unanticipated unknowns in printing, causing an unpredictable variation, dot by dot, of at least one geometric characteristic of the printed dots and prior to said print step, a step generating said distribution of dots so that at least half the dots of said distribution are not laterally juxtaposed to four other dots of said dot distribution, and at least one dimension of at least one part of the dots of said distribution of dots is of the same order of magnitude as the average for the absolute value of said unpredictable variation. In embodiments, during the step generating the dot distribution, more than half the dots do not touch any other dot of said distribution.

Abstract: The document securization method includes: a step of printing a distribution of dots on the document, the printing, as a result of unanticipated unknowns in printing, causing an unpredictable variation, dot by dot, of at least one geometric characteristic of the printed dots and prior to the print step, a step of generating the distribution of dots so that dots of the distribution have at least one geometric characteristic that varies among dots, the geometric amplitude of the generated variation having the order of magnitude of the unpredictable variation. Preferably during the generation step, in the dot distribution: at least half the dots of the distribution are not laterally juxtaposed to four other dots of the dot distribution, and at least one dimension of at least one part of the dots of the dot distribution is of the same order of magnitude as the average for the absolute value of the unpredictable variation.