Abstract: A method of coding a secret, a numerical value d, subdivided into a number N of secret elements [di]n1, a composition law () applied to the elements di giving the value d. The following are calculated: (A) a first image (TN) of the secret by iterative calculation and application of the law () between the first image Ti-1 of rank i?1 and of the product according to this law of the element (di) of next rank and of a random value (Ri) of a first set, (B) a first numerical value (S1) by application of the law () to the N random values (Ri), (C) a second numerical value (S2) by application of the law to the N?1 random values (Aj) of a second set, (D) a second image T? of the secret by application of the inverse law () to the first image (TN) and to the second numerical value (S2) so as to generate an intermediate image (Tx) and then application of the inverse law to the intermediate image (Tx) and to the second numerical value (S2).

Abstract: A device for capturing a silhouette consisting of a transparent wall, a vision device to capture at least one image of the wall and a processing unit connected to the vision device which analyses the captured images and detects the silhouette of the individual passing between the transparent wall and the vision device. More than one pattern is positioned on the transparent wall and the patterns exhibit a contrast with the transparent wall.

Abstract: The invention concerns a biometric capture optical device (1) comprising a prismatic optical element (2) having one side (4) appearing in a window (3) to provide a support surface for a bodily limb and illuminating means (6) designed to illuminate the side (4) from within the element (2) and form by total reflection a biometric image of the bodily limb; in addition, luminous information display means are located beneath the element (2) opposite the window (3) so as, in the absence of the bodily limb on the side (4), to transmit, without total reflection, through the window (3) a luminous information image visible from outside (15).

Abstract: The invention relates to equipment for the identification of an individual by capture of body imprint images and of the underlying venous network, comprising: a prismatic optical element having: a large side for apposition of a body zone; a first inclined lateral side receiving a first radiation having a first wave length emitted by a first lighting means to light the large side with total reflection; a second inclined lateral side facing a first sensor receiving the first reflected radiation carrying an image of the body imprint; and a small side receiving a second radiation having a second wave length emitted by second lighting means, perpendicularly reaching the apposition zone and penetrating the body zone, and which faces a second sensor receiving the second reflected radiation carrying an image of the underlying venous network.

Abstract: A cryptographic calculation is executed in an electronic component, according to a cryptographic algorithm including at least one application of a one-way function which is disabled upon an intrusion into the electronic component. The one-way function is based on a first affine operation corresponding to a first secret key. The one-way function is applied, by obtaining (11) first and second random values (r, r?), then, by obtaining a first result (13) by applying a second affine operation (?K1), which corresponds to a second secret key, to a first combination (12) of the first and second random values, and, by obtaining (14) thereafter a second result by applying a third affine operation (OK2), which corresponds to a third secret key, to said first result.

Abstract: A method for processing at least an imprint image of an individual using a processing device that comprises an exhibition glass sheet having a surface for receiving said imprint. The method includes acquiring without contact at least one image of the imprint present in the space upstream from the said surface and which has not yet been in contact with it and detecting the contact between the imprint and the exhibition glass sheet; acquiring by contact at least one image of the imprint after contact with the exhibition glass sheet; and standardizing at least one of the contact-less images in proportions that are identical to those of one of the contact images by analysing at least one of the contact-less images and at least one of the contact images.

Abstract: A method of securely transferring data. The source data stored in a source memory (NV_MEM) is compared with the transferred data (COPY_ELT_X_V_MEM) that has been copied from the source memory (NV_MEM) into a “destination” memory (V_MEM). The method consists in reading from the source memory (NV_MEM) an integrity value (PI_ELT_X) associated with an element (ELEMENT_X_NV_MEM) such as file containing the source data, in calculating the integrity of a reconstituted element made up of the transferred data (COPY_ELT_X_V_MEM) associated, where appropriate, with the data of the source element (ELEMENT_X_NV_MEM) other than the data that was transferred, and in deciding that the transferred data (COPY_ELT_X_V_MEM) is identical to the source data when the integrity calculation gives a value identical to the integrity value of the source element (PI_ELT_X). The method applies to transferring data between components of a smart card.

Abstract: A method of coding a secret, a numerical value d, subdivided into a number N of secret elements [di]n1, a composition law () applied to the elements di giving the value d. The following are calculated: (A) a first image (TN) of the secret by iterative calculation and application of the law () between the first image Ti?1 of rank i?1 and of the product according to this law of the element (di) of next rank and of a random value (Ri) of a first set, (B) a first numerical value (S1) by application of the law () to the N random values (Ri), (C) a second numerical value (S2) by application of the law to the N?1 random values (Aj) of a second set, (D) a second image T? of the secret by application of the inverse law () to the first image (TN) and to the second numerical value (S2) so as to generate an intermediate image (Tx) and then application of the inverse law to the intermediate image (Tx) and to the second numerical value (S2).

Abstract: The invention relates to a multilayer card of thermoplastic material comprising first and second layers (7, 2) secured to each other, together with least one reinforced bonding zone (9) between the first layer and the second layer. The invention also provides a method of making a multilayer card secure.

Abstract: Biometric data relating to a biological part are processed by obtaining, on the one hand, a first set of transformed biometric data (f(B1)) by applying at least one irreversible transformation to a first set of biometric data (B1), and, on the other hand, a second set of transformed biometric data (f(B2)) by applying said transformation to a second set of biometric data (B2). Thereafter, a decision is made as to whether the second biometric data set corresponds to the first biometric data set on the basis of a comparison between the first transformed biometric data set and the second transformed biometric data set, said comparison being performed at the bit level of a digital representation of said first and second transformed biometric data sets as a function of an error corrector code word.

Abstract: A method of analyzing a presence in a space (5), the method comprising the steps of: projecting at least one light beam (10) into the space towards a screen in such a manner that at least a portion of a body, if present in the space, casts a shadow onto the screen; and analyzing the shadow cast on the screen.

Abstract: The invention relates to a person identification control method and to a system for implementing same. The inventive method comprises the following steps consisting in: detecting biometric data (23, 48, 79, 94, 108) relating to at least one person; seeking a concordance between the biometric data relating to the person and biometric data that have been pre-stored in a biometric database (26, 51, 83, 97, 110), said pre-stored biometric data relating to persons for whom identification means have already been generated; and, when no concordance is found, generating an identification means (29, 56, 84, 98, 103, 111) that is associated with the person from the biometric data relating to the person and at least one identity (24, 49, 80, 95, 117) for said person.

Abstract: The invention concerns an optical identification device comprising a digital camera (4), the camera including a member for changing focal length between at least a visual observation focal length and a print recognition focal length, and the device including an automatic print recognition system (10), which is connected to the camera to be activated when the camera is in the print recognition focal length.

Abstract: The invention relates to a method for validating a biometrical acquisition, mainly the acquisition of a body imprint of a body area such as fingerprints or a face imprint, wherein the method involves together with the biometric acquisition: lighting the body area using at least one radiation having at least two respective different wavelengths between approximately 500 nm and 1150 nm; taking at least two reflectometry measurements concerning said and at least two wavelengths for measuring the reflection index of the tissues for these wavelengths; calculating the ratio for two measured indices; and comparing the ratio with a range of reference values characterizing a haemoglobin-containing living tissue in terms of proportions of oxygenated and non-oxygenated forms characteristic of the living states for the wavelengths in question; if the ratio is included in said range, the body area is considered as living and the biometrical acquisition is validated; and conversely, if the body area is considered as not li

Abstract: The present invention concerns a method of determining the living character of an element carrying a fingerprint. The method according to the invention is characterised in that it consists of making on the one hand at least one electrical measurement and on the other hand taking an image of the said fingerprint, and then validating the said or each electrical measurement by comparing it with the range of values of electrical measurements defined by a pre-established relationship linking the said range to characteristics of the said image.

Abstract: A method for identifying a person (200) by capturing an image of the iris producing an anamorphic transformation of the image along a horizontal axis and then a vertical axis to code it in the form of one or two models. The model is compared with reference models stored in a database to determine the identity of the person. The acquisition device captures the image of the iris through means of optical deformation to produce the anamorphic transformation of the image and then codes the image into the models.

Abstract: The invention relates to a system (100) for capturing images of the face of an individual comprising: an image capture device (110) having a line of sight (112) directed towards the place from where the individual arrives, and two illumination devices (102, 104) disposed symmetrically with respect to the line of sight (112) and at a distance therefrom, each comprising means of generating a light flux intended to illuminate the face of the individual as he moves and whereof the illumination lobe (106, 108), representative of the luminance in a horizontal plane, has a maximum, the two lobes (106, 108) being symmetrical with each other with respect to the line of sight (112), the capture system (100) being characterised in that the generation means are such that each lobe (106, 108) is asymmetric with respect to the straight line bearing said maximum and has, from this maximum, a first front (122) curved towards the image capture device (110) and a second front (120) that is substantially plane and extending

Abstract: A method of managing a memory having stored elements that are organized in a hierarchy, each having a header containing individual identity information and a body containing data, the identity information of each element being encoded on a plurality of bits each of which can take a first value or a second value. The identity information of each element is obtained by repeating the identity information of an element constituting a direct antecedent of the element in question in the hierarchy, and in said identity information of the antecedent, by changing the value of a first value bit that follows the last second value bit in a direction for reading the identity information.

Abstract: The method of verifying the integrity of an encryption key (K) obtained by combining at least two key portions (KM, M) in a protected zone (3) by using a commutative operator, comprises the steps of: using the commutative operator to perform a first combination between a key portion (KM) and a verification encryption key (Kv); using the commutative operator to perform in succession a combination between a key portion that has not yet been combined and a result obtained by an immediately preceding combination, until a last combination (Mv) is performed that includes all of the key portions; performing a combination in the protected zone (3) between the encryption key (K) to be verified and the last combination (Mv) of the verification encryption key (Kv) and the key portions (KM, M) in order to obtain a final verification key (Kf); encrypting verification data (Dv) by means of a symmetrical encryption algorithm (DES) using the final verification key (Kf); and making a comparison with a verification encryption

Abstract: A method of identifying an individual in which captured images are encrypted by a transformation function and superimposed over previously recorded encrypted images. The superimposition image thus formed is used for identity verification. If the verification is negative a looping step repeats the process until positive verification is achieved.