Physical-Layer Security for Spectrum Sharing Systems
Yulong Zou

TL;DR
This paper introduces a source cooperation framework with opportunistic jamming to enhance physical-layer security in spectrum sharing systems, demonstrating improved secrecy diversity and intercept probability performance.
Contribution
It proposes two novel SC-aided jamming schemes, SC-RJS and SC-OJS, with analytical expressions and insights into their secrecy diversity gains in spectrum sharing security.
Findings
SC-RJS and SC-OJS achieve secrecy diversity of one.
Proposed schemes outperform non-cooperation in intercept probability.
Optimal jammer selection offers no additional diversity gain over random selection.
Abstract
In this paper, we examine the physical-layer security for a spectrum sharing system consisting of multiple source-destination pairs, which dynamically access their shared spectrum for data transmissions in the presence of an eavesdropper. We propose a source cooperation (SC) aided opportunistic jamming framework for protecting the transmission confidentiality of the spectrum sharing system against eavesdropping. Specifically, when a source node is allowed to access the shared spectrum for data transmissions, another source is opportunistically selected in the spectrum sharing system to transmit an artificial noise for disrupting the eavesdropper without affecting the legitimate transmissions. We present two specific SC aided opportunistic jamming schemes, namely the SC aided random jammer selection (RJS) and optimal jammer selection (OJS), which are referred to as the SC-RJS and SC-OJS,…
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Taxonomy
TopicsWireless Communication Security Techniques · Cognitive Radio Networks and Spectrum Sensing · Cooperative Communication and Network Coding
