VERFAHREN ZUR IDENTIFIZIERUNG ODER AUTHENTISIERUNG EINES ELEMENTS, WIE EIN FIDUZIARISCHES DOKUMENT.

摘要

The invention concerns a security-marking procedure, an apparatus to sense a security marking, fiduciary documents provided with security markings, by resorting to rare-earth chelates consisting of at least two rare-earths and of which the fluorescence wavelengths vary as functions of temperature, and fiduciary document containing such chelate(s).