FIELD: information technologies.
SUBSTANCE: according to the method, a parallel individual bar and digit code is applied onto paper medium, and space between the main and individual bar and digit codes is filled with unreproducible pattern by means of jet printer, and its control electrodes are connected to power supply unit through random number generator. When forming unreproducible pattern, at least two jet printers are used, which function independently on each other with different colours and are installed at the sharp angle to formed unreproducible pattern, meanwhile lengthy traces are formed, mainly perpendicular to each other.
EFFECT: provision of counterfeit protection of a document.
4 dwg
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