Abstract: Some implementations may provide a computer-implemented method for validating a digital document, the method including: receiving, at a computing device, the digital document comprising at least two digital watermarks, the digital document issued by a central entity; retrieving a first digital watermark from the digital document, the first digital watermark visually presented at a first time point; retrieving a second digital watermark from the digital document, the second digital watermark visually presented at a second time point, the second digital watermark being different from the first digital watermark and the second time point being different from the first time point; and reading the digital document based on the retrieved first and second digital watermarks.

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: A method for imaging an object is provided. The method includes acquiring image data of the object, wherein the image data includes a plurality of original voxels each having an original CT number, identifying, using a processing device, a subset of the original voxels based on at least one of an original CT number and a location of each original voxel, applying, using the processing device, an anisotropic smoothing filter to the identified original voxels in the subset to generate a set of smoothed voxels each having a smoothed CT number, generating, using the processing device, smoothed image data by combining the original voxels and the smoothed voxels, and analyzing the smoothed image data to determine whether the object contains contraband.

Abstract: A detection system assembly is provided. The detection system assembly includes a detector system including a housing having a sample port configured to receive a sample of an unknown substance, a detector assembly in flow communication with the sample port, and a pump in flow communication with the detector assembly. The detection system assembly further includes a dryer cartridge removably coupled to an outer surface of the housing of the detector system. The dryer cartridge is in flow communication with the pump and the detector assembly.

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: 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: 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 contraband detection system is provided. The contraband detection system includes an X-ray system including a front X-ray transmitter/detector and a rear X-ray transmitter/detector. The contraband detection system further includes a quadrupole resonance (QR) system comprising a first QR coil, and a second QR coil, wherein the first and second QR coils are located between the front and rear X-ray transmitter/detectors, and wherein the first and second QR coils are constructed from a material having a low mass attenuation coefficient and a high conductivity such that the first and second QR coils do not substantially interfere with transmitting X-rays and detecting emitted photons using the X-ray system. The contraband detection system further comprise a computing device coupled to the X-ray system and the QR system, the computing device configured to detect contraband based on signals received from the X-ray system and the QR system.

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: A detection system assembly is provided. The detection system assembly includes a detector system including a housing having a sample port configured to receive a sample of an unknown substance, a detector assembly in flow communication with the sample port, and a pump in flow communication with the detector assembly. The detection system assembly further includes a dryer cartridge removably coupled to an outer surface of the housing of the detector system. The dryer cartridge is in flow communication with the pump and the detector assembly.

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.

Abstract: It is an object to generate a desired composite image in which a motion area of a subject is correctly composited. A difference image between a base target and an aligned swap target is generated (S1021), and an extracted contour in the difference image is determined according to the active contour model (S1022). The inner area of the contour and the outer area of the contour are painted with different colors to be color-coded so as to generate a mask image for alpha blending (S1023). Using the mask image thus generated, the swap target that is aligned with respect to the base target is composited with the base target of the base image by alpha blending (S1024).

Abstract: The present invention relates to a chip card comprising: an interface (112) to a master device (120), a single tasking processor (102) for receiving chip card commands from the master via the interface, first program instructions (106) for execution by the processor, the first program instructions implementing a chip card function, second program instructions (110) for execution by the processor, the second program instructions implementing an endless loop, third program instructions (108) for execution by the processor, the third program instructions being adapted to start execution of the second program instructions in response to a blocking signal.

Abstract: A cryptographic calculation includes obtaining a point P(X,Y) from a parameter t on an elliptical curve Y2=f(X); and from polynomials X1(t), X2(t), X3(t) and U(t) satisfying: f(X1(t))·f(X2(t))·f(X3(t))=U(t)2 in Fq, with q=3 mod 4. Firstly a value of the parameter t is obtained. Next, the point P is determined by: (i) calculating X1=X1(t), X2=X2(t), X3=X3(t) and U=U(t); (ii) if the term f(X1)·f(X2) is a square, then testing whether the term f(X3) is a square in Fq and if so calculating the square root of f(X3) in order to obtain the point P(X3); (iii) otherwise, testing whether the term f(X1) is a square and, if so, calculating the square root of f(X1) in order to obtain the point P(X1); (iv) otherwise, calculating the square root of f(X2) in order to obtain the point P(X2). This point P is useful in a cryptographic application.

Abstract: A cryptographic calculation includes obtaining a point P(X,Y) from a parameter t on an elliptical curve Y2=f(X) and from polynomials satisfying: ?f(X1(t)).f(X2(t))=U(t)2 in the finite body Fq, irrespective of the parameter t, q=3 mod 4. A value of the parameter t is obtained and the point P is determined by: (i) calculating X1=X1(t), X2=X2(t) and U=U(t); (ii) testing whether the term f(X?1) is a squared term in the finite body Fq and, if so, calculating the square root of the term f(X1), the point P having X1 as abscissa and Y1, the square root of the term f(X1), as ordinate; (iii) otherwise, calculating the square root of the term f(X2), the point P having X2, as abscissa and Y2, the square root of the term f(X2), as ordinate. The point P is useful in encryption, scrambling, signature, authentication or identification cryptographic applications.

Abstract: An apparatus for detecting constituents in a sample includes a casing and an ionization chamber defined by the casing. The apparatus also includes an ion collector positioned downstream of the ionization chamber. The apparatus further includes a spectral analysis device coupled to the ion collector. The spectral analysis device is configured to generate a detection spectrum representative of ions collected at the ion collector. The detection spectrum includes an analyte peak portion and a peak tailing portion. The apparatus also includes a control system that is configured to generate a first pulse having a first polarity to initiate a discharge of stored ions from the ionization chamber. The control system is also configured to generate a second pulse substantially immediately after the first pulse. The second pulse has a second polarity opposite the first polarity and is configured to reduce the peak tailing portion.