BOPI 05 BR/2023 REPERTOIRE NUMERIQUE 46 (11) 20980 (51) G07D 7/1205 (2018.01) (21) 1202300007 - PCT/EP2021/069522 (22) 13/07/2021 (30) US n° 63/052,695 du 16/07/2020 (54) Method and system for detecting and authenticating a taggant in a marking via Surface-Enhanced Raman Spectroscopy. (72) MOLINA, Aldric (CH) et BREWSTER, James (US) (73) SICPA HOLDING SA, Avenue de Florissant 41, CH-1008 PRILLY (CH) (74) Cabinet NICO HALLE & CO. LAW FIRM, 1st Floor SHALOM Building, Ancienne Route, Opposite Pharmacie du Pont/Express Union, B.P. 4876, DOUALA (CM). (57) The invention relates to a method, and a corresponding system, capable to check whether genuine SERS or SERRS taggants having a unique characteristic surface enhancement scattering feature are present or not on a machine-readable marking applied on a value document by using a Raman spectrometer adapted to perform a Raman Spectroscopy analysis of the marking. The method according to the invention allows a reliable and fast detection of a presence of the SERS/SERRS taggants, and is particularly suitable for checking authenticity of value documents, e.g. such as banknotes, moving with respect to the Raman spectrometer with a given speed, and possibly with a high speed, or briefly exposed to the Raman spectrometer. Consulter le mémoire
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