Abstract: The invention relates to a database (10) suitable for combining biometric data (b) and an identifier (Id(b)). For this purpose, biometric data (bref) are collected (101). Next, a plurality of keywords is generated (102) by means of applying a family (H) of hash functions to the biometric data. Then, a plurality of addresses (@i) is obtained (103) by means of applying an addressing function (F) to the plurality of keywords and to a secret key. Finally, the identifier is stored (104) at said plurality of addresses.

Abstract: The description relates in particular to a method for encoding information represented in the form of a function P, and to a corresponding method for decoding information. The encoding comprises the encoding of secondary information. These methods may be implemented within a context of biometric enrollment and (respectively) biometric authentication. The description also relates to an electronic device, a computer program, and a storage medium for the implementation of such methods.

Abstract: A functional program stored in a memory area of an electronic card may be protected against an attack by disturbance of electrical origin intended to modify at least one logic state of at least one code of this program. The method may include: a storage step during which codes of the functional program and codes of a check program intended to check the logical behaviour of the functional program are stored in the memory of the card; and a step of executing at least one code of the functional program followed by a step of checking the logic states of the functional program by executing the check program. During the storage step, the codes of the check program are stored in a memory area formed by addresses that are defined so that the attack by disturbance of electrical origin has no influence on the logic states of this program.

Abstract: A method for recognizing a graphic element of technical function which is printed on a play slip (10) is based on a comparison of images. The content of an area (30) of the slip in which the graphic element is printed, is compared to reference images. The method is compatible with any mode for printing the graphic element on the slip: alphanumeric codes, barcodes, logos, pictures which vary according to the game, etc., but only uses one recognition algorithm. The graphic element which is recognized may be any graphic element of technical function, including a graphic element of useful data, in particular a game code (3) or a game symbol, or a reference graphic element for determining a position of the slip.

Abstract: A sensor for venous networks of a part of a living body, having an infrared illumination source, a waveguide illuminated by the infrared illumination source and having, on one face, at least one extraction zone intended to extract the infrared rays from the waveguide in at least one main extraction direction, an image acquisition means disposed opposite the one face so as to define between them a passage through the entrance of which the part of the living body can enter, and having a sensitive element, the or each extraction zone being such that the or each main extraction direction of the extraction zone oriented so as not to intercept the sensitive element.

Abstract: A card including a data transmission mechanism using annex transmission channels. A method is described for the transmission of data by a chip card at an end of its life using hidden communication channels different from standard communication channels of the card. The data are transmitted by modulating a binary signal that results from a modification of a hardware parameter of the card.

Abstract: The invention relates to an authentication device (1), characterized in that it comprises a support (10) provided with a surface (12), said surface comprising a plurality of peaks (14) and valleys (15) forming a pattern (13) capable of being acquired by a digital fingerprint sensor. The invention also relates to a method of manufacturing such a device.

Abstract: The present invention relates to a method and device for obtaining an image of a crumpled document from an image of this document when it is crumpled. The method comprises a step of determining a three-dimensional geometric model of the surface of the crumpled document by triangulation of three-dimensional points defined from the pattern of a target extracted from the image of this document when it is crumpled; the method is characterized in that it comprises a step of determining a projection of the three-dimensional geometric model onto a so-called acquisition plane, by means of error minimization of this projection under constraints of preserving defined geometric characteristics in the vicinity of the three-dimensional points, and in that it comprises a step of superimposing the textures associated with the three-dimensional model onto the projection of this model thus determined.

Abstract: An embedded system and, in particular, a communication protocol suitable for a data transmission using auxiliary physical channels of such an embedded system. A transmission method suitable for such a channel includes the transmission of a data signal based on the encoding of three symbols. The message consists of a preamble allowing recognition of the symbols used, followed by the significant part of the message. The decoding of the message comprises a first step of learning the symbols used, prior to the decoding of the significant part of the message.

Abstract: The present invention relates to the field of the management of memory writes to an information processing device and more precisely to a method of writing a set of data in a unitary and coherent manner. The invention, although of more general scope, applies more particularly in the field of chip cards. There is described a method of writing one or more data to the memory of an information processing device which comprises a step of copying a so-called original memory block comprising the data to be written to a so-called backup memory block. The data writing step is then carried out in the original memory block or in the backup memory block. It is then always possible to return if necessary to the values of the original data if the writing phase fails.

Abstract: Method of identification or of authorization using a system comprising at least one sensor for acquiring biometric data and one secure module storing a set of digital data obtained starting from a set of respective biometric data by means of a digitization algorithm. According to this method, a biometric data value is obtained, acquired by the sensor; a digital value is obtained by application of the digitization algorithm to the acquired biometric data value; within the secure module, at least some of the digital data from said set of digital data are ranked according to their proximity to the digital value obtained; and a biometric data value is obtained from said set of biometric data by taking into account a position of the corresponding digital data within the ranking.

Abstract: The present invention relates to a method for slaving the activation of a set of infrared emitters of a sensor of venous networks to the presence of a living body between this set and an image acquisition means of the sensor. The method is characterized in that each infrared emitter (E) is activated if the presence of a part of the living body (CV) is detected by at least one presence detector (DP) which is associated therewith and each infrared emitter (E) is deactivated as long as the presence of a part of the living body (CV) is not detected.

Abstract: A method for generating a public identity for authenticating an individual carrying an identification object, the method including: entering an initial biometric datum of the individual; generating a first key from the biometric datum; generating a second key derived from a datum generated by a security component of the object; generating an initial encryption key combining the first key and the second key; communicating with a server a first identity of the individual in connection with the initial encryption key; generating by the server a public identity by encrypting the first identity using the initial encryption key, the public identity being stored by the server in connection with the initial encryption key. The public identity is not significant, but is secured by a strong connection between the object and biometry of the individual.

Abstract: The present invention concerns a method for synchronising several cameras with each other in a photographic system designed to take a multiple view of a scene, said cameras being of the CCD or CMOS digital type. According to the invention, said method comprises the steps of: illuminating said scene by means of a lighting system the lighting intensity of which varies periodically, and setting each of said cameras in a so-called anti-flicker mode where they are themselves synchronised by phase locking on the variations in light intensity of the lighting system. The invention also concerns a photographic system for implementing said method.

Abstract: A server-implemented method encrypting at least two pieces of indexed data as lists of elements, each element belonging to a finite set of indexed symbols on an alphabet. The data is encrypted to form a protected set, including: the server randomly generates, for each datum, a corresponding encoding function; if at least one element that constitutes a datum is the symbol of the alphabet, the server determines the image of the symbol of the alphabet via the encoding function corresponding to the datum to obtain a codeword coordinate and adds the codeword coordinate to an indexed set corresponding to the element of the alphabet; then the server completes the indexed set with error-inducing points; the server randomly reindexes the elements of the indexed set corresponding to the symbol of the alphabet; and the server adds the indexed set to the protected set. The method can identify an individual.

Abstract: A method for verifying identity of a user of a communicating terminal, including: a preliminary operation including: communicating a first piece of identity data of a user to at least one server, generating a second piece of identity data of the user from the server, the second piece of data defining a derived identity of the user, and storing the second piece of identity data in a secure memory of the terminal; an operation for identity verification, including: transmitting a token for encryption from the server to the terminal, using the second piece of data at the terminal at least to generate an encryption of the token, the encrypted token being transmitted to the server and verified by the server, and in a case of positive verification of the encrypted token by the server, the server validates the identity verification of the user of the terminal.

Abstract: The invention relates to a method of detecting fraud for an access control system using biometric recognition, comprising the steps consisting in: taking at least two images (S2) of a face presented to the access control system by an individual (I) according to at least two positions of the individual in front of the access control system, or two angles of picture-taking of the individual, processing these two images to determine a score representative of the flatness of the face appearing on the images, and as a function of this flatness score, detecting a possible fraud on the part of the individual, said detection conditioning the implementation of an identification processing of the individual by the access control system. The invention also relates to an access control system implementing said method.

Abstract: The invention relates to a document-processing system, which includes a device suitable for supplying consecutive recorded images as well as a background surface, comprising a step of storing a standard background surface image. The next step consists of detecting the presence of a document moving across a series of recorded images relative to the standard background surface image. The following step consists of monitoring the movement of the document within the series of images. The end of the movement of the document is then detected and the standard background surface image is updated. The movement of the document is monitored by determining document-extraction masks respectively for the recorded images, the extraction mask of a recorded image being obtained according to an entropy card of the recorded image relative to said standard background surface image.

Abstract: The present invention relates to a method for following an object in a sequence of at least two images termed previous and current. The said method comprises a step for forming a first set Ep of points Ep={Pp(1), . . . , Pp(i), . . . , Pp(N)} by extracting N characteristic points Pp(i) of the object present in the previous image and for forming a second set Ec of points Ec={Pc(1), . . . , Pc(i), . . . , Pc(M)} by extracting M characteristic points Pc(j) of the object present in the current image, a step for estimating the parameters of a model of movement of the object between the two images on the basis of pairs of matched points thus formed, and a step of selecting the pairs of matched points used to estimate the parameters of the movement model, in the course of which said pairs of matched points are selected solely from among those which are related to points of the first set of points which are singular, each point of the first set of points being a singular point.

Abstract: The invention relates in particular to a method for writing data in a non-volatile memory of a smart card. The invention also relates to a smart card and a computer program capable of implementing such a method, to a storage medium including such a computer program, and to a system including a smart card and a device making it possible to write in the card.