Abstract: A method for processing an acquired image (IA) showing a structured personal document (D) including a visual inspection zone (VIZ). The method includes determination of a first character string from an automatic reading zone or of barcode type (MRZ) of predetermined format, the first character string representing personalised information specific to the owner of the document (D), generation from the first character string of an intermediate image (IS) showing a second character string representing the same personalised information, detection in the acquired image of a third character string in the visual inspection zone (VIZ), representing the same personalised information, the detection comprising an overall comparison of the intermediate image (IS) with the acquired image, location in the visual inspection zone (VIZ) of a region of interest containing the third character string.

Abstract: The invention relates to a cryptographic processing method comprising multiplication of a point P of an elliptic curve on a Galois field by a scalar k, the multiplication comprising steps of: storing, in a first register, a zero point of the Galois field, executing a loop comprising at least one iteration comprising steps of: selecting a window of w bits in the non-signed binary representation of the scalar k, w being a predetermined integer independent of the scalar k and strictly greater than 1, calculating multiple points of P being each associated with a bit of the window and of the form ±2iP, adding or not in the first register of multiple points stored, depending of the value of the bit of the window with which the multiple points are associated, wherein the loop ends once each bit of the non-signed binary representation of the scalar k has been selected, returning a value stored in the first register.