Amplify-and-forward compressed sensing as a physical-layer secrecy solution in wireless sensor networks

Joan Enric Barcelo-Llado, Antoni Morell, Gonzalo Seco-Granados

Research output: Contribution to journalArticleResearchpeer-review

24 Citations (Scopus)

Abstract

In this paper, we assess the physical-layer secrecy performance of the amplify-and-forward compressed sensing (AF-CS) framework when malicious eavesdropping nodes are listening. In particular, we investigate the robustness of the AF-CS scheme in the presence of a group of coordinated eavesdropping nodes under the assumption that they have corrupted channel state information. In order to fulfil this assumption, we propose a channel estimation technique based on pseudorandom pilots. This technique introduces extra uncertainty only in the channel estimation of the eavesdroppers. Our simulation results evaluate the physical-layer protection as a function of the total number of coordinated eavesdroppers and the level of channel estimation distortion of the eavesdroppers. We demonstrate that a small number of eavesdroppers (small being defined later on) has a zero probability of recovering the intended signal. We also show that a very large number of eavesdropping nodes are required to perfectly recover the signal in comparison with other distributed compressed sensing schemes in the literature. © 2014 IEEE.
Original languageEnglish
Article number6756993
Pages (from-to)839-850
JournalIEEE Transactions on Information Forensics and Security
Volume9
Issue number5
DOIs
Publication statusPublished - 1 Jan 2014

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