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IEEE International Conference on Computer and Communications (ICCC)

Cooperative jamming secure scheme for untrusted full-duplex relay system

Bolun Li, Tao Liang

Published Oct 1, 2016• 5 citations
Publisher

Abstract

In this paper, we focus on a practical communication system, an untrusted full-duplex relay (UFDR) network with a transmitter Alice and a full-duplex receiver Bob. The relay is untrusted who is supposed to forward the signal to Bob and at the same time, acts as a potential eavesdropper to intercept the message from Alice. Since there is no direct link between Alice and Bob, positive secrecy rate can not be obtained. To handle with this issue, based on the precondition that in-band full-duplex technology has been basically matured and can be applied in relay communication, we propose a destination-aided cooperative intended jamming scheme (UFDR-IJ scheme for short). We study the secure performance of the communication system model described in this paper, and obtain a closed-form expression for the secrecy outage probability which verifies the fact that the UFDR-IJ scheme can significantly enhance the secure performance while double the secrecy capacity of the communication system comparing to the traditional cooperative communication scheme.

DOI
10.1109/compcomm.2016.7925115

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In this paper, we focus on a practical communication system, an untrusted full-duplex relay (UFDR) network with a transmitter Alice and a full-duplex receiver Bob. The relay is untrusted who is supposed to forward the signal to Bob and at the same time, acts as a potential eavesdropper to intercept the message from Alice. Since there is no direct link between Alice and Bob, positive secrecy rate can not be obtained. To handle with this issue, based on the precondition that in-band full-duplex technology has been basically matured and can be applied in relay communication, we propose a destination-aided cooperative intended jamming scheme (UFDR-IJ scheme for short). We study the secure performance of the communication system model described in this paper, and obtain a closed-form expression for the secrecy outage probability which verifies the fact that the UFDR-IJ scheme can significantly enhance the secure performance while double the secrecy capacity of the communication system comparing to the traditional cooperative communication scheme.
In this work, we propose a full-duplex relay (FDR) network for secure communication in the presence of an eavesdropper. We consider both the destination and the amplify-and-forward relay has a full-duplex capability for a higher rate and/or a stronger secrecy performance. In particular, the destination transmits a cooperative jamming signal while receiving the relayed signal. To get analytic understanding, we derive a closed-form expression for the secrecy rate of the proposed FDR network. Numerical evaluations are also conducted to verify the analytic results.
We propose a destination-based jamming scheme for cooperative networks with multiple untrusted amplify-and-forward relays, in which the destination operates in full-duplex mode so as to enable simultaneous reception of the information coming directly from the source and the transmission of jamming signals to the untrusted relay. An approximate analytical expression for the secrecy outage probability, under the effect of residual self-interference at the destination, is presented. The developed analysis is verified through Monte Carlo simulations.
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. This jamming signal helps protecting the source message from being captured reliably at the untrusted relay, while the destination cancels itself intended jamming signal. The optimal power allocation (OPA) technique is considered for the presented system. It is observed that the objective function is a quasiconcave function at high signal-to-noise-ratio (SNR) regimes. Based on this OPA technique, we study the ergodic secrecy rate (ESR) and the secrecy outage probability (SOP) of the system when the source and relay are equipped with a single antenna while the destination is equipped with largescale antenna arrays (LSA). Using the achieved closed-form expressions, one can evaluate the performance of the secure system easily and fast and also, they provide significant insight for system design. Finally, simulation results indicate the accuracy of the derived expressions.
This paper studies the secrecy outage probability of full-duplex (FD) relay networks in the presence of external eavesdropper and residual self-interference, where the FD relay can forward message or transmit jamming signal. Different with the existing researches which consider the full-duplex relay employs decode-and-forward (DF) protocol, we study the situation that the FD relay uses amplify-and-forward (AF) protocol, and propose a destination aided jamming scheme to further improve the secrecy performance when the FD relay transmits jamming. Furthermore, we compare the secrecy outage probability of four different schemes (i.e., AF forwarding scheme, AF destination- aided jamming scheme, DF forwarding scheme and DF jamming scheme), and give the answer that which mode the FD relay should employ with different system parameters.
Cooperative relaying is often deployed to enhance the communication reliability (i.e., diversity order) and consequently the end-to-end achievable rate. However, this raises several security concerns when the relays are untrusted, since they may have access to the relayed message. In this paper, we study the achievable secrecy diversity order of cooperative networks with untrusted relays. In particular, we consider a network with an N-antenna transmitter (Alice), K single-antenna relays, and a single-antenna destination (Bob). We consider the general scenario, where there is no relation between N and K, and therefore, K can be larger than N. Alice and Bob are assumed to be far away from each other, and all communication is done through the relays, i.e., there is no direct link. Providing secure communication while enhancing the diversity order has been shown to be very challenging. In fact, it has been shown in the literature that the maximum achievable secrecy diversity order for the adopted system model is one (while using artificial noise jamming). In this paper, we adopt a nonlinear interference alignment scheme that we have proposed recently to transmit the signals from Alice to Bob. We analyze the proposed scheme in terms of the achievable secrecy rate and secrecy diversity order. Assuming Gaussian inputs, we derive an explicit expression for the achievable secrecy rate and show analytically that a secrecy diversity order of up to min(N, K) - 1 can be achieved using the proposed technique. We provide several numerical examples to validate the obtained analytical results and demonstrate the superiority of the proposed technique to its counterparts that exist in the literature.
Non-orthogonal multiple access (NOMA) is an important technology for the forthcoming 5 G and beyond. However, its privacy often suffers from adversarial eavesdropping, especially for the users with higher transmit power. In this paper, we propose a jamming-aided secure transmission scheme for cooperative NOMA networks with a full-duplex (FD) relay. In this scheme, two pairs of users perform secure transmission with the help of a decode-forward (DF) relay, which forwards information and generates artificial jamming to counteract eavesdropping. The precoding vectors are designed to zero-force the artificial jamming at legal receivers. Then, the channel statistics are calculated, based on which the secrecy rates of legitimate signals are analyzed and the expressions of secrecy outage probability (SOP) are derived. Furthermore, three benchmark schemes are also presented with their performance analyzed to verify the advantage of the proposed scheme. Simulation results show the accuracy of our analysis, and demonstrate that the proposed scheme can effectively reduce the SOP and improve the effective secrecy throughput via artificial jamming and FD relaying.