Abstract: Provided is a method of detecting fraud during use of a device for capturing an imprint of a body part using a principle of total internal reflection with dark field and including a transparent plate on which a body part to be verified is placed. The method includes: using the device to acquire a first imprint image with a lighting of the body part such that the whole surface of the body part in contact with the transparent plate returns light; using the device to acquire a least one second imprint image by illuminating the body part with a single LED; obtaining for each second imprint image an item of information representative of a light level re-emitted by the body part by using each image obtained; and comparing each item of information obtained with a reference item of information to validate that the body part is a true body part.

Abstract: A compact device for capturing an imprint of a body part working by total reflection with dark background.

Abstract: Optical imaging device comprising: an array of substantially point light sources, an array of photo-detectors interlaced with the array of light sources, an optical medium of thickness greater than the pitch of the photo-detectors and forming capture and detection surfaces, means for successively switching on and off each of a part of the light sources and reading a part of the photo-detectors receiving rays coming from the switched on source and having undergone reflection against the detection surface while forming an angle of incidence estimated as a function of the optical medium and the element to image.

Abstract: Provided is a method for verifying the veracity of a finger by a verification device including a projection device projecting a pattern of parallel lines orthogonal to the longitudinal direction of the finger, a capture device capturing an image of the finger and of the pattern, and a processing unit. The method includes: an illumination step in which the projection device illuminates the finger with the pattern; a contactless capture step in which the capture device captures a pattern image of the projected pattern; a fringe-extraction step in which the processing unit extracts fringes from the pattern image; a feature-calculation step in which the processing unit calculates a feature relating to the physical structure of the fringes; a comparison step during which the processing unit compares the calculated feature with reference values; and a decision-making step in which the processing unit makes a decision regarding the veracity of the finger.

Abstract: A method and device for verifying the validity of an electronic document is provided. A device for capturing images and capturing a sequence of images displayed by a device for presenting the electronic document is activated. The sequence of images may include different two-dimensional barcodes displayed successively one after the other, where the two-dimensional barcodes represent a signature of the electronic document and parts of the electronic document. The two-dimensional barcodes are decoded, and the validity of the signature is verified by means of a public key. A message representing the result of the verification is generated.

Abstract: Method for verifying data generated by an electronic device included in equipment, the electronic device including a computing unit, a one-time programmable memory and a volatile memory, the equipment including a rewritable non-volatile memory and a communication bus enabling the electronic device to store data in the rewritable non-volatile memory. The method includes: creating a secured channel by encryption between the equipment and a server; obtaining an authentication key from the server; loading data and a message authentication code from the rewritable non-volatile memory to the volatile memory, the message authentication code obtained by the electronic device from the authentication key and said data prior to the storage of said data and message authentication code in the rewritable non-volatile memory, the electronic device not having kept the authentication key following the obtaining of the message authentication code; verifying said data using the secret key and the message authentication code.

Abstract: The invention relates to a method and system for supplying a token in a host card emulation system comprising first and second devices and a secure payment platform, the method comprises the steps of transfer by the second device to the first device an identifier of the second device, reception by the second device of a first token and an identifier of the second device, the first token being a symmetrical derivation of a second token of the first device with the identifier of the second device, transfer by the second device of a message comprising a cryptogram signed with the first token, the identifier of the first device and predetermined information indicating that the first token has been transferred by a third party.