Anti-counterfeit authentication method for optical memory...

G - Physics – 06 – K

Patent

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G06K 19/14 (2006.01) G06K 7/12 (2006.01) G06K 19/06 (2006.01) G07D 7/12 (2006.01)

Patent

CA 2402782

The invention is a method and system for inhibiting the use of counterfeited optical memory cards (11) and hybrid smart cards that use Drexon.TM. reflective laser recordable media (17) for recording and storing data. Use of such counterfeit version of Drexon.TM. optical memory cards (11) can be inhibited by use of two or more LEDs, or semiconductor lasers, which would focus their light beams on the apparent Drexon.TM. optical memory stripe (17). Using photodetectors, the reflectivity of the Drexon.TM. stripe (17) would be measured at two or more wavelengths including the visible and the infrared so as to identify the Drexon.TM. media (17), a silver particle-based material which has a unique reflectivity vs. wavelength characteristic. If the relative reflectivities match those predetermined characteristics of the Drexon.TM. media (17), the card (11) would not be rejected; otherwise it would be rejected.

Cette invention porte sur un procédé et sur un système visant à inhiber l'utilisation de cartes mémoire optiques contrefaites (11) et des cartes à puce hybrides utilisant un support laser réflectif enregistrable Drexon3 (17) pour l'enregistrement et le stockage de données. On peut empêcher l'utilisation d'une version contrefaite de cartes mémoire optiques Drexon3 (11) au moyen de deux diodes électroluminescentes au moins ou de lasers à semi-conducteurs qui pourraient ainsi focaliser leurs faisceaux lumineux sur la bande mémoire optique apparente Drexon3 (17). A l'aide de photodétecteurs, la réflectivité de la bande Drexon3 (17) serait alors mesurée au niveau de deux longueurs d'onde au moins comprenant le visible et l'infrarouge de façon à identifier le support Drexon3 (17), un matériau à base de particules d'argent qui a une réflectivité unique contre une caractéristique de longueur d'onde. Si les réflectivités relatives correspondent à ces caractéristiques prédéterminées du support Drexon3 (17), la carte n'est pas rejetée. Dans le cas contraire, elle l'est.

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