Secret-Key-Aided Scheme for Securing Untrusted DF Relaying Networks
Preprint Posting Date2017-06-12
Online Publication Date2018-01-30
Print Publication Date2018-07
Permanent link to this recordhttp://hdl.handle.net/10754/626541
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AbstractThis paper proposes a new scheme to secure the transmissions in an untrusted decode-and-forward (DF) relaying network. A legitimate source node, Alice, sends her data to a legitimate destination node, Bob, with the aid of an untrusted DF relay node, Charlie. To secure the transmissions from Charlie during relaying time slots, each data codeword is secured using a secret-key codeword that has been previously shared between Alice and Bob during the perfectly secured time slots (i.e., when the channel secrecy rate is positive). The secret-key bits exchanged between Alice and Bob are stored in a finite-length buffer and are used to secure data transmission whenever needed. We model the secret-key buffer as a queueing system and analyze its Markov chain. Our numerical results show the gains of our proposed scheme relative to benchmarks. Moreover, the proposed scheme achieves an upper bound on the secure throughput.
CitationShafie AE, Sultan A, Mabrouk A, Tourki K, Al-Dhahir N (2018) Secret-Key-Aided Scheme for Securing Untrusted DF Relaying Networks. IEEE Transactions on Vehicular Technology 67: 6727–6731. Available: http://dx.doi.org/10.1109/TVT.2018.2799900.
SponsorsThis paper was made possible by NPRP grant number 8-627-2-260 from the Qatar National Research Fund (a member of Qatar Foundation). The statements made herein are solely the responsibility of the authors. The review of this paper was coordinated by Prof. J. Li.