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Testbed Implementation and Evaluation of Interleaved and Scrambled Coding for Physical-Layer Security

Martins, C. M. S. M. ; Simões, T. G. ; Gomes, M. ; Vilela, J.P.

Testbed Implementation and Evaluation of Interleaved and Scrambled Coding for Physical-Layer Security, Proc Vehicular Technology Conference: VTC-Spring , Porto, Portugal, Vol. , pp. - , June, 2018.

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Abstract
This paper presents a testbed implementation and evaluation of coding for secrecy schemes in a real environment through software defined radio platforms. These coding schemes rely on interleaving and scrambling with randomly generated keys to shuffle information before transmission. These keys are then encoded jointly with data and then hidden (erased) before transmission, thus only being retrievable through parity information resulting from encoded data. An advantage of the legitimate receiver (e.g. a better signal-to-noise ratio) on the reception of those keys provides the means to achieve secrecy against an adversary eavesdropper. Through this testbed implementation, we show the practical feasibility of coding for secrecy schemes in real-world environments, unveiling the usefulness of interleaving and scrambling with a hidden key to reduce the required advantage over an eavesdropper. We further describe and present solutions to a set of issues that appear when doing practical implementations of security schemes in software defined radio platforms.