Authentication by means of geometric security features

G - Physics – 07 – D

Patent

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G07D 7/04 (2006.01)

Patent

CA 2608908

A method of authenticating value documents has following steps: a. providing a document (30) to be checked for authenticity; b. providing a high-frequency magnetic excitation field; c. providing a trajectory path (24) for checking the document (30); d. providing a detection coil (26); e. the detection coil receiving a detection signal when the document (30) follows the trajectory path (26); f. deriving geometric parameters from the detection signal; g. comparing the geometric parameters with the geometric parameters of a genuine value document.

Procédé destiné à authentifier des documents de valeur comportant les étapes suivantes : a. la présentation d'un document (30) l'authenticité dont à contrôler; b. la mise à disposition d'un champ d'excitation magnétique haute fréquence ; c. la mise à disposition d'un chemin de trajectoire (24) pour contrôler le document (30) ; d. la mise à disposition d'une bobine de détection (26) ; e.la réception par la bobine de détection d'un signal de détection lorsque le document (30) suit le chemin de trajectoire (26) ; f. la déduction de paramètres géométriques à partir du signal de détection ; g. la comparaison des paramètres géométriques avec les paramètres géométriques d'un document de valeur authentique.

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