Please use this identifier to cite or link to this item: https://biore.bio.bg.ac.rs/handle/123456789/1496
Title: Naturally safe: Cellular noise for document security
Authors: Pavlović, Danica
Rabasović, Mihailo D
Krmpot, Aleksandar J
Lazović, Vladimir
Ćurčić, Srećko 
Stojanović, Dejan V
Jelenković, Branislav
Zhang, Wang
Zhang, Di
Vukmirović, Nenad
Stepanenko, Dimitrije
Kolarić, Branko
Pantelić, Dejan V
Keywords: biophotonics;complexity;iridescence;optical document security;variability
Issue Date: 27-Aug-2019
Rank: M21
Journal: Journal of Biophotonics
Abstract: 
Modern document protection relies on the simultaneous combination of many optical features with micron and submicron structures, whose complexity is the main obstacle for unauthorized copying. In that sense, documents are best protected by the diffractive optical elements generated lithographically and mass-produced by embossing. The problem is that the resulting security elements are identical, facilitating mass-production of both original and counterfeited documents. Here, we prove that each butterfly wing-scale is structurally and optically unique and can be used as an inimitable optical memory tag and applied for document security. Wing-scales, exhibiting angular variability of their color, were laser-cut and bleached to imprint cryptographic information of an authorized issuer. The resulting optical memory tag is extremely durable, as verified by several century-old insect specimens still retaining their coloration. The described technique is simple, amenable to mass-production, low cost and easy to integrate within the existing security infrastructure.
URI: https://biore.bio.bg.ac.rs/handle/123456789/1496
DOI: 10.1002/jbio.201900218
Appears in Collections:Journal Article

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