INFORMATION CARRIER FOR PROTECTION OF ARTICLES WITH IDENTIFICATION CONTRAST IMAGE AGAINST FAKING Russian patent published in 1999 - IPC

FIELD: detection of authenticity of bank notes, securities, credit documents, standard labels of articles. SUBSTANCE: one label from set of protection labels is designed as image which identical to identification contrast image of article. Information carrier has base, which has region which is made from magnetic material, shaped as strip and is covered from visual perception by code data, which are provided as group of protection labels for reading code using detection. One protection label is designed as image which is subjected to cryptographic modulation using key k, of at least part of identification contrast image of article. Another protection label is made from material which has stochastic mix of at least two stable isotopes with different atomic weights. These label is detected by means of unit for detection of reference stochastic values for ratio of weight of isotopes with different atomic weights. EFFECT: optical detection of information field of information carrier. 2 cl, 1 dwg