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Confidential Cooperative Communication with the Trust Degree of Jammer

National Pilot School of Software, Yunnan University, Kunming 650504, China
Key Laboratory in Software Engineering of Yunnan Province, Kunming 650504, China
School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China
School of Communication Engineering, Hangzhou Dianzi University, Hangzhou 310018, China
Author to whom correspondence should be addressed.
Entropy 2019, 21(6), 595;
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)
PDF [291 KB, uploaded 15 June 2019]


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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