FIELD: checking documents, in particular, securities, lottery tickets. SUBSTANCE: method involves application of microscopic structure or image onto document surface in at least two places using given values of identification vectors, which are joined by means of secret numerical equation. Upon checking document authenticity, method involves their statistical detection. EFFECT: increased protection, simplified production of document and complexity of faking, decreased cost of document preparation. 5 cl, 7 dwg
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Authors
Dates
2000-05-20—Published
1997-06-13—Filed