PROTECTIVE ELEMENT FOR AUTHENTICATING SECURITY OBJECT AND AUTHENTICATION METHOD Russian patent published in 2010 - IPC G07D7/00 B82B3/00 

FIELD: information technology.

SUBSTANCE: protective element for authenticating a security object has a substrate and a metal-coated layer, where the said metal-coated layer is a single-layer or multilayer insular metal-coated layer or a layer made from granular metal, having nonlinear dependency of electrophysical properties when exposed to a weak constant or alternating electric field, and also has a protective dielectric layer deposited on top of the said metal-coated layer. The detected authenticity feature of the security object is nonlinear conductivity of the protective element which is determined by measuring conductivity of the protective element at two different amplitude values of the said electric field applied to the protective element.

EFFECT: more reliable protection and easier checking of protective properties.

5 cl, 4 dwg