A Microwave-Based Invisible -Watermarking- Emulated by an Embedded Set of Electromagnetic Material in a Plastic CardReportar como inadecuado




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This article describes a passive, economical strategy towards enhancing the security feature of conventional plastic cards by embedding a set of electromagnetic EM material that emulates an invisible -watermarking-. This is an overlay strategy to prevailing security measures and consists of incorporating invisibly embedding, say by ink-jet printing or otherwise a set of foil-film-like grids of electromagnetic EM material such as high-μ material or high-conductivity metal within the cross-section of the card. The test-card when exposed to a suitable excitation of microwave ISM band excitation, the embedment of EM material in the card is rendered to yield distinct path-loss to the traversing EM energy. That is, by making each element of embedment a grid-frame made of vertical or set of horizontal strips, relative to the plane of polarization of EM excitation, each grid-frame will offer high logic 1 or low logic 0 transmissions when the card is swiped across the EM field. By sensing appropriately, this differentiable EM attenuation across the card would depict an output signal annunciating the presence of a binary-logic encoding in the embedded -watermarking-. The proposed effort augments the existing security features of a plastic card design and robustly reduces the chances of malpractices, such as plastic card counterfeiting and misuse. The concept-design as proposed is positively verified through experimental test cards and also justified with theoretical considerations.

KEYWORDS

Microwave-Based Watermarking, Plastic Cards, Electromagnetic Materials

Cite this paper

P. Neelakanta and S. Lim -A Microwave-Based Invisible -Watermarking- Emulated by an Embedded Set of Electromagnetic Material in a Plastic Card,- Journal of Electromagnetic Analysis and Applications, Vol. 2 No. 3, 2010, pp. 121-127. doi: 10.4236-jemaa.2010.23018.





Autor: Perambur Neelakanta, Swee-Hock Lim

Fuente: http://www.scirp.org/



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