Method for authentication by chemical marking or tracing of...

G - Physics – 07 – D

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G07D 7/14 (2006.01) G07D 7/00 (2006.01) G09F 3/02 (2006.01)

Patent

CA 2504155

The invention concerns a method for authenticating different objects or substances to be identified comprising at least two phases: during an initial phase, selecting a plurality of chemical markers, assigning to and incorporating in each of the objects or substances a combination of markers, establishing an identification and/or authentication code (blocks 2, 11), storing in memory data or code for identifying and/or authenticating all the objects or substances and annex data; during an identification and/or authentication phase: a spectrophotometric analysis so as to determine a specific scanned code of the presence or absence of the markers (blocks 3, 4), identifying the object or the substance by comparing the scanned code and the identification and/or authentication codes (block 6). The invention is particularly applicable to fighting against counterfeiting, to automatic sorting, and the like.

Le procédé selon l~invention concerne un procédé d~authentification d~objets ou de substances différents à identifier comprenant au moins deux phases: -Au cours d~une phase initiale: -le choix d~une pluralité de marqueurs chimiques, - l~attribution puis l~incorporation dans chacun des objets ou substances d~une combinaison de marqueurs, -l~établissement d~un code d~identification et/ou d~authentification (blocs 2, 11), -le stockage en mémoire des données ou code d~identification et/ou d~authentification de tous les objets ou substances et de données annexes. -Au cours d~une phase d~identification et/ou d~authentification: -une analyse spectrophotométrique de manière à déterminer un code lu spécifique de la présence ou de l~absence des marqueurs (blocs 3, 4), -l~identification de l~objet ou de la substance par comparaison du code lu et des codes d~identification et/ou d~authentification (bloc 6). Elle s~applique notamment à la lutte contre la contrefaçon, au tri automatique~

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