Secrecy Performance of Friendly Jammer Assisted Cooperative NOMA Systems with Internal Eavesdroppers

Abolpour, Milad; Aı̈ssa, Sonia; Mirmohseni, Mahtab; Aref, Mohammad Reza

doi:10.1109/pimrc48278.2020.9217169

Cited by 10 publications

(3 citation statements)

References 11 publications

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“…After the application of integration by parts and simple mathematical steps, we get Equation (C.10) After substituting the expression from (D.6) and (D.9) along with Equation ( 19) and applying similar steps as in Appendix A, we get Equation (21).…”

Section: Appendix C (Proof Of Equation (18))mentioning

confidence: 99%

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Secrecy outage probability of DF‐based C‐NOMA under half and full duplex

Gadi,

Singh,

Kumar

et al. 2023

IET Communications

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Cooperative Non‐orthogonal Multiple Access (C‐NOMA) is projected as the dominant technology for 5G and beyond. Also, physical layer security, due to the presence of eaves‐dropper, is a bottleneck security concern for any open link wireless system. This manuscript presents a novel Decode & Forward (DF)‐based C‐NOMA system in the presence of two eavesdroppers. Moreover, both half duplex and full duplex schemes are included in the analysis. Thereby, separate expressions for Secrecy Outage Probability (SOP), being among the most crucial performance measures in physical layer security, are produced and examined for the system under consideration. Specifically, first of all, novel expression of SOP for C‐NOMA systems under both Half Duplex (HD) and Full Duplex (FD) schemes is derived for the case when only eavesdropper one (E1) attacks on link source to device one (S‐D1). Thereafter, expressions of SOP for the C‐NOMA system under both HD and FD schemes are derived, considering presence of E1 and E2 on the links, source to device one (S‐D1) and source to device two (S‐D2), respectively. Further, for both the duplexes, the effect of eavesdropper one (E1) and eavesdropper two (E2) on the links, S‐D1 and S‐D2, respectively, is analyzed. The presented analysis is useful in the technological development level of C‐NOMA in the presence of multiple eavesdroppers. The simulated results show perfect agreement with the theory.

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Section: Appendix C (Proof Of Equation (18))mentioning

confidence: 99%

“…Also, the authors in [20] AF relay for FD NOMA system without cooperation. But, the authors in [21] are based on FD-NOMA with cooperation but in the absence of any Eve's dropper. Also, the system in [22] is based on the cooperative NOMA system but in the absence of any Eve's dropper and without FD.…”

Section: Introductionmentioning

confidence: 99%

Secrecy outage probability of DF‐based C‐NOMA under half and full duplex

Gadi,

Singh,

Kumar

et al. 2023

IET Communications

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“…Several studies have also looked at the system performance when RS, or H-K signaling in a more general sense, operates in the presence of eavesdroppers. Indeed, since the signals are transmitted on free medium, eavesdroppers, whether external or internal to the communication system, have the opportunity to overhear the messages of the system's users, [17], [18]. Generally speaking, to ensure secure communication, alongside cryptography protocols, solutions based on physicallayer security (PLS) can leverage the randomness of the fading channels to guarantee message secrecy [19], [20].…”

Section: A Contextmentioning

confidence: 99%

Rate Splitting in the Presence of Untrusted Users: Outage and Secrecy Outage Performances

Abolpour

Aı̈ssa

Musavian

et al. 2022

IEEE Open J. Commun. Soc.

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In this contribution, a thorough investigation of the performance of rate splitting is conducted in terms of outage and secrecy outage for the simultaneous service to a near user and far user, where the latter attempts to overhear the message of the former. The source transmits a linear combination of the users' common stream and private streams. Once the common stream is retrieved, two decoding strategies can be adopted by each user. In the first strategy, the nodes (near or far) treat the far user's private stream as noise to retrieve the private stream of the near user, then the far user decodes its own stream. In the second strategy, the nodes decode the far user's private stream by treating the one of the near user as noise, then the near user retrieves its private stream while the far user decodes the stream of the near user in its attempt to overhear it. Considering the four decoding combinations, we obtain exact closed-form expressions for the outage probability, and provide tight approximations for the secrecy outage probability. Comparative results are also provided. In particular, it is shown that to achieve better outage probability, with no concern about secrecy, once the decoding of the common stream is completed, each user should first retrieve the private stream with lower target data rate by treating the other private stream as noise. To improve the secrecy outage probability, once the common stream is decoded, the near user must first decode the far user's private stream, and the far user should first retrieve the private stream with lower target data rate.

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