abstract—in this paper, the problem of secure transmission in two-hop amplify-and-forward (af) systems with an untrusted relay is investigated. to prevent the untrusted relay from intercepting the source message and to achieve positive secrecy rate, the destination-based cooperative jamming (dbcj) technique is used. in this method the destination sends an intended jamming signal to the relay. t...

Abstract—In this paper, the problem of secure transmission in two-hop amplify-and-forward (AF) systems with an untrusted relay is investigated. To prevent the untrusted relay from intercepting the source message and to achieve positive secrecy rate, the destination-based cooperative jamming (DBCJ) technique is used. In this method the destination sends an intended jamming signal to the relay. T...

93 AIJ Electrical & Electronics Engineering, Vol 48, No. 2, Fall 2016 Please cite this article using: Kuhestani, A., Mohammadi, A., and Emadi, M. J., 2016. “Performance Study of Untrusted Relay Network Utilizing Cooperative Jammer”. Amirkabir International Journal of Electrical and Electronics Engineering, 48(2), pp. 93–99. DOI: 10.22060/eej.2016.820 URL: http://eej.aut.ac.ir/article_820.html *...

In this paper, we propose a novel secure transmission scheme for MIMO Two-Way Relay Channels. By exploiting the properties of the transmission medium in the physical layer, our proposed scheme could achieve a high transmission efficiency as well as security. Two different approaches has been introduced including Information Theoretical approach and Physical Layer Encryption approach. Direction ...

We apply the concept of artificial and controlled interference in a triangular relay network with an untrusted relay aiming at enhancing the wireless communication secrecy between the source and the destination node. In order to shield the square quadrature amplitude modulated (QAM) signals transmitted from the source node to the relay, the destination node designs and transmits artificial nois...

A two-phase beamforming solution for secure communication using untrusted relay nodes is presented. To thwart eavesdropping attempts of relay nodes, we deliberately introduce artificial noise in the source message. After pointing out the incongruity in evaluating secrecy rate in our model for certain scenarios, we provide an SNR based frame work for secure communication. We intend to bring down...