Improving physical layer security in untrusted relay networks: cooperative jamming and power allocation

Lv, Lu; Chen, Jian; Yang, Long; Kuo, Yan-Fu

doi:10.1049/iet-com.2016.0355

Cited by 50 publications

(48 citation statements)

References 32 publications

(58 reference statements)

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“…After this cancellation, the ESC and SOP have been found out. In He and Yener's study, and in previous studies, the authors demonstrate the performance of network considering the untrusted relays. In previous studies ) and Lv, Chen, Yang, and Kuo's study, signals are sent by nodes using a fixed power budget.…”

Section: Introductionmentioning

confidence: 75%

“…The authors observe that as the number of untrusted relays increases, performance in terms of secrecy outage probability (SOP) decreases as in Sun, Zhang, Li, and Niu's study. 12 In Kalamkar and Banerjee's study, 14 DBJ has been used to protect the confidential message from untrusted relay, whereas in Lv, Chen, Yang, and Kuo's study, 15 source-based jamming (SBJ) has been applied to deteriorate the SINR at the untrusted relay. In Kalamkar and Banerjee's study, 14 when the source sends the information signal to the untrusted relay, the destination sends a jamming signal to the untrusted relay at the same time slot.…”

Section: Untrusted Relay Destination-and-source Based Jamming and Pmentioning

confidence: 99%

“…In the aforementioned works, secrecy‐based works under untrusted AF relay, without any cognitive scenario, have been investigated in previous studies . Multiple untrusted energy harvesting AF relays are also not considered in aforementioned works.…”

Section: Introductionmentioning

confidence: 99%

“…In the present work A, we consider information transfer in an underlay CCRN via multiple untrusted relays that work in AF mode and harvest energy from information signal of secondary source (SS) and jamming signal of secondary destination (SD). To prevent eavesdropping by untrusted relays, DBJ is considered as in previous studies and Kalamkar and Banerjee's study where in contrast to SBJ as in Lv, Chen, Yang, and Kuo's study . Power is assigned to SNs under the interference constraint of the primary network.…”

Section: Introductionmentioning

confidence: 99%

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Secure communication in cognitive radio networks with untrusted AF relays

Sharma

Roy

Kundu

2019

Int J Communication

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Summary In this paper, two underlay based cognitive cooperative radio networks, each with one secondary source (SS), one secondary destination (SD), N untrusted secondary amplify and forward relays (USAFRs), one primary transmitter, and one primary receiver (PU‐RX), are considered for evaluating the secrecy performance. The SS sends the information to the SD in two time slots via multiple USAFRs in the absence of direct link between SS and SD. In the first time slot, SS and SD transmit the message and jamming signal to multiple USAFRs, respectively. In the second slot, a selected USAFR amplifies and forwards the combined received signals to the SD. The transmit powers of the secondary nodes are chosen so as to maintain the overall interference at PU‐RX below a specified limit. The transmit power of a selected USAFR is derived using the harvested energy from the RF signals of SS and SD. Two network scenarios of eavesdropping by USAFRs are studied: in one case, all USAFRs eavesdrop; while in the second case, only the selected USAFR eavesdrops the message during forwarding of the signal and power is allocated to secondary nodes on the basis of outage threshold of primary network. We investigate the secrecy outage probability (SOP) in both of the networks under several physical parameters. Analytical framework for evaluating SOP for both the cases are given while SOP in single integration form is given for the second case. MATLAB simulation results are presented for both the cases.

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Section: Introductionmentioning

confidence: 75%

Section: Untrusted Relay Destination-and-source Based Jamming and Pmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Secure communication in cognitive radio networks with untrusted AF relays

Sharma

Roy

Kundu

2019

Int J Communication

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“…In [27], a new closed-form solution was derived to determine the optimal power allocation (OPA) between the base station and mobile user with friendly jamming in two-way untrusted relay networks. In [29], the power allocation for multi-relay nodes was studied. In [28], the power allocation and locations of confidential and jamming signals were analyzed in detail in terms of network security performance.…”

Section: Introductionmentioning

confidence: 99%

Joint optimization of beamforming and power allocation for DAJ-based untrusted relay networks

Yao

Mekkawy

et al. 2018

ETRI Journal

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Destination‐assisted jamming (DAJ) is usually used to protect confidential information against untrusted relays and eavesdroppers in wireless networks. In this paper, a DAJ‐based untrusted relay network with multiple antennas installed is presented. To increase the secrecy, a joint optimization of beamforming and power allocation at the source and destination is studied. A matched‐filter precoder is introduced to maximize the cooperative jamming signal by directing cooperative jamming signals toward untrusted relays. Then, based on generalized singular‐value decomposition (GSVD), a novel transmitted precoder for confidential signals is devised to align the signal into the subspace corresponding to the confidential transmission channel. To decouple the precoder design and optimal power allocation, an iterative algorithm is proposed to jointly optimize the above parameters. Numerical results validate the effectiveness of the proposed scheme. Compared with other schemes, the proposed scheme shows significant improvement in terms of security performance.

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Nelder‐Mead–based power optimization for secrecy enhancement in amplify‐and‐forward cooperative relay networks

Jibukumar

Ali

2019

Int J Communication

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SummaryCooperative communication based on relaying nodes has been considered as a promising technique to increase the physical layer security (PLS) performance in wireless communications. In this paper, an optimal power allocation (OPA) scheme based on Nelder‐Mead (NM) algorithm is proposed for improving the secrecy rate of amplify‐and‐forward (AF) cooperative relay networks employing cooperative jamming (CJ) scheme. The proposed hybrid jamming scheme allows the source and selected relay to transmit the jamming signal along with the information to confound the eavesdropper. The path selection probability of ant colony optimization (ACO) algorithm is used for selecting the relay for transmission. The performance based on secrecy rate is evaluated for “n” trusted relays distributed dispersedly between the source and destination. Gradient‐based optimization and three‐dimensional exhaustive search methods are used as benchmark schemes for comparison of the proposed power optimization algorithm. The secrecy performance is also compared with conventional AF scheme and CJ scheme without power optimization (EPA). The impact of single and multiple relays on secrecy performance is also evaluated. Numerical results reveal that, compared with the gradient method and exhaustive search algorithm, the proposed power allocation strategy achieves optimal performance. Also, the derived OPA results show a significantly higher secrecy rate than the EPA strategy for both CJ and AF schemes.

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Improving physical layer security in untrusted relay networks: cooperative jamming and power allocation

Cited by 50 publications

References 32 publications

Secure communication in cognitive radio networks with untrusted AF relays

Secure communication in cognitive radio networks with untrusted AF relays

Joint optimization of beamforming and power allocation for DAJ-based untrusted relay networks

Nelder‐Mead–based power optimization for secrecy enhancement in amplify‐and‐forward cooperative relay networks

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