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Confidential Cooperative Communication with the Trust Degree of Jammer

1
National Pilot School of Software, Yunnan University, Kunming 650504, China
2
Key Laboratory in Software Engineering of Yunnan Province, Kunming 650504, China
3
School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China
4
School of Communication Engineering, Hangzhou Dianzi University, Hangzhou 310018, China
*
Author to whom correspondence should be addressed.
Entropy 2019, 21(6), 595; https://doi.org/10.3390/e21060595
Received: 16 May 2019 / Revised: 11 June 2019 / Accepted: 13 June 2019 / Published: 15 June 2019
(This article belongs to the Special Issue Information-Theoretic Security II)
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PDF [291 KB, uploaded 15 June 2019]
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Abstract

In this paper, we consider the trust degree of a jammer, defined as the probability that the jammer cooperates to secure the legitimate transmission, and investigate its influence on confidential cooperative communication. According to the trust degree, we derive the closed-form optimal transmit signal-to-noise ratio (SNR) of the confidential message, ρ c , to maximize the expected secrecy rate, and further obtain the relationship between ρ c and the trust degree associated with the transmit SNR at the transmit user and channel gains. Simulation results demonstrate that the trust degree has a great effect on the transmit SNR of the confidential message and helps improve the performance of confidential cooperation in terms of the expected secrecy rate. View Full-Text
Keywords: trust degree; confidential communication; cooperative jamming; transmit SNR trust degree; confidential communication; cooperative jamming; transmit SNR
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Zhao, M.; Liu, D.; Gao, H.; Feng, W. Confidential Cooperative Communication with the Trust Degree of Jammer. Entropy 2019, 21, 595.

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