The present invention relates to a device for the composition and the anti-fake by using this or authentication of a security ink containing a luminescent material such as a quantum dot (quantum dot). Security inks includes a plurality of QD are dispersed liquid medium. By a suitable light source is a security print This shows the PL having more than 30% quantum yield and, 40nm life, the life is changed by at least 5% over the emission spectrum of a QD. Apparatus using the ink for anti-counterfeiting security or authentication is to decompose the PL lifetime space is uniquely identified for the presence of PL materials.