FIELD: information technology.
SUBSTANCE: method allows for a thin structure of levels and coherent quantum properties of nanoparticles which lead to that when the security object is exposed to two electromagnetic fields at a defined frequency, previously known changes in luminescence spectra is possible in the presence of constant electric or magnetic fields. An authentic document is characterised by known difference of the spectrum and dynamics of the luminescence process when simultaneously exposed to two fields from luminescence characteristics when separately exposed to each of the probing fields.
EFFECT: highly reliable protection of documents from forgery.
2 cl, 3 dwg
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