A Secure Network Coding Based Modify-and-Forward Scheme for Cooperative Wireless Relay Networks

This paper investigates the security at the physical layer of cooperative relay communications. Inspired by the principle of physical-layer network coding (PNC), we propose a new secure relaying scheme, namely secure PNC-based modify-and-forward (SPMF). In the proposed scheme, the relay node linearl...

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Bibliographic Details
Published in:	2016 IEEE 83rd Vehicular Technology Conference (VTC Spring) pp. 1 - 5
Main Authors:	Quoc-Tuan Vien, Tuan Anh Le, Nguyen, Huan X., Hoc Phan
Format:	Conference Proceeding
Language:	English
Published:	IEEE 01.05.2016
Subjects:	Cryptography Jamming Network coding Relays Signal to noise ratio Wireless communication
Online Access:	Get full text
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Summary:	This paper investigates the security at the physical layer of cooperative relay communications. Inspired by the principle of physical-layer network coding (PNC), we propose a new secure relaying scheme, namely secure PNC-based modify-and-forward (SPMF). In the proposed scheme, the relay node linearly combines the decoded data from the source node with an encrypted key before conveying the mixed data to the destination node. As both the linear PNC operation and encrypted key at the relay are unknown to the eavesdropper, the SPMF scheme provides a double security level in the system. Particularly, taking into account the practical scenario of the imperfect knowledge shared between the relay and destination, the secrecy outage probability (SOP) of the proposed SPMF scheme is analysed and evaluated in comparison with modify-and-forward, cooperative jamming, decode-and- forward and direct transmission schemes. The proposed scheme is shown to achieve a performance improvement of up to 3 dB when compared to the conventional schemes under imperfect knowledge of shared information between the nodes.
DOI:	10.1109/VTCSpring.2016.7504104