Secure Transmission Design for Cooperative NOMA in the Presence of Internal Eavesdropping

Su, Binbin and Yu, Wenjuan and Liu, Hongbo and Chorti, Arsenia and Poor, H. Vincent (2022) Secure Transmission Design for Cooperative NOMA in the Presence of Internal Eavesdropping. IEEE Wireless Communications Letters, 11 (5). pp. 878-882. ISSN 2162-2337

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Abstract

The application of successive interference cancellation (SIC) introduces critical security risks to cooperative non-orthogonal multiple access (NOMA) systems in the presence of untrustworthy network nodes, referred to as internal eavesdroppers. To address this potential security and reliability flaw, by assuming all users are untrusted, this letter investigates the effective secrecy throughput (EST) for a cooperative NOMA system, where a near user serves as an amplify-and-forward relay to help forward the information of a far user. Considering the inverse power allocation and SIC decoding order, a novel jamming strategy is proposed to enhance the security performance of the far user. Gauss-Chebyshev approximations of ESTs over Nakagami- m channels are derived. Asymptotic EST expressions are proposed to provide further insights. Numerical results demonstrate that the proposed jamming strategy and the inverse power allocation and SIC decoding order are both essential for achieving positive secrecy rates for both users.

Item Type:
Journal Article
Journal or Publication Title:
IEEE Wireless Communications Letters
Additional Information:
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Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100/3101
Subjects:
ID Code:
160516
Deposited By:
Deposited On:
15 Nov 2021 13:55
Refereed?:
Yes
Published?:
Published
Last Modified:
29 Nov 2022 01:14