FIELD: engineering of optical identification means.
SUBSTANCE: method includes providing for given position of key, lighting it for receiving information from identification element of key and processing received information, while key during use is moved in predetermined manner, and as identification element a portion of its body is used characterized by randomly placed heterogeneities, while image of identification element of key is received during consecutive registration of proving optical radiation focused on identification element and being subject to effect from optical heterogeneities present in lighted in current time moment point of identification element.
EFFECT: simplified manufacturing, lesser costs.
3 cl, 2 dwg
