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A Method Enabling Exploitation of Spatial Diversity and Physical Layer Security in an Extreme Case of Source-Wiretapping without a Jamming Beamformer  

Tran, Truc Thanh (Institute of Research and Development, Duy Tan University, Danang Department of Information and Communication)
Kong, Hyung Yun (Department of Electrical Engineering, University of Ulsan)
Publication Information
Journal of Communications and Networks / v.17, no.5, 2015 , pp. 482-490 More about this Journal
Abstract
This article exploits spatial diversity for jamming to prevent wiretapping in the extreme case in which an eavesdropper is located near the source and a common jamming signal is unavailable. To address this challenge, the jamming signal is allowed to carry a random binary message. Then, it is proposed that the active intermediate node transmits this jamming signal and the decoding of this signal at both source and destination is physically secured as result of using the physical-layer security method. If the source and the destination securely and correctly decode this jamming message, the source transmits another message which is created from combining its information message and the decoded message using the network-coding method. Therefore, this method prevents the transmissions from being eavesdropped upon by the source-wiretapping.
Keywords
Jamming; physical-layer secrecy; secrecy rate;
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