RIS-aided protected zone formation for physical layer security of in-band full duplex systems
RIS-aided protected zone formation for physical layer security of in-band full duplex systems
The rapid evolution of mobile technologies presents a formidable security challenge, as traditional cryptographic methods struggle to keep pace. Integrating physical layer security (PLS) solutions with cutting-edge technologies such as in-band full-duplex (IBFD) and reconfigurable intelligent surfaces (RISs) holds promise for addressing these challenges effectively. This study introduces a novel RIS-driven protected zone (PZ) formation approach that employs artificial noise (AN) to safeguard legitimate users without requiring a priori knowledge of eavesdropper locations, channels, or numbers. The proposed methodology partitions the RIS into two distinct segments: while the former segment enhances the achievable data rate for legitimate signal, the latter segment concurrently amplifies AN to jam illegitimate users within the PZ.We present formulations and solutions for maximizing secrecy capacity (SC) and minimizing power consumption through optimized transmit power allocation factors, RIS segmentation, and beams’ directions, all subject to stringent quality-of-service (QoS) constraints. Closed-form expressions are derived to facilitate efficient implementation and performance optimization. Simulation results validate closed-form solutions and demonstrate that the proposed scheme can significantly enhance SC compared to benchmarks where RIS and AN are used separately, with the proposed scheme achieving approximately 81% greater capacity than the “RIS-Only” approach and a substantial advantage over the “AN-Only” approach, which results in no secrecy. Additionally, this work includes an analysis of energy efficiency, emphasizing the critical importance of optimizing power consumption in practical applications. This dual focus on improving security while effectively managing energy resources underscores the scheme’s practical relevance and efficiency.
Artificial noise, energy efficiency, full-duplex, optimization, partitioning, physical layer security, power control, reconfigurable intelligent surface, secrecy capacity
Salman, Hanadi
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Celik, Abdulkadir
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Arzykulov, Sultangali
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Eltawil, Ahmed M.
5eb9e965-5ec8-4da1-baee-c3cab0fb2a72
Arslan, Huseyin
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Salman, Hanadi
0428bab5-2f0e-40b3-a418-3c0b2ce7d889
Celik, Abdulkadir
f8e72266-763c-4849-b38e-2ea2f50a69d0
Arzykulov, Sultangali
25fb1b83-665d-4fe7-9e56-81cacc2f8e7a
Eltawil, Ahmed M.
5eb9e965-5ec8-4da1-baee-c3cab0fb2a72
Arslan, Huseyin
e933fd32-5003-4d12-9e4a-ac8906588f4c
Salman, Hanadi, Celik, Abdulkadir, Arzykulov, Sultangali, Eltawil, Ahmed M. and Arslan, Huseyin
(2025)
RIS-aided protected zone formation for physical layer security of in-band full duplex systems.
IEEE Transactions on Wireless Communications, 25.
(doi:10.1109/TWC.2025.3619209).
Abstract
The rapid evolution of mobile technologies presents a formidable security challenge, as traditional cryptographic methods struggle to keep pace. Integrating physical layer security (PLS) solutions with cutting-edge technologies such as in-band full-duplex (IBFD) and reconfigurable intelligent surfaces (RISs) holds promise for addressing these challenges effectively. This study introduces a novel RIS-driven protected zone (PZ) formation approach that employs artificial noise (AN) to safeguard legitimate users without requiring a priori knowledge of eavesdropper locations, channels, or numbers. The proposed methodology partitions the RIS into two distinct segments: while the former segment enhances the achievable data rate for legitimate signal, the latter segment concurrently amplifies AN to jam illegitimate users within the PZ.We present formulations and solutions for maximizing secrecy capacity (SC) and minimizing power consumption through optimized transmit power allocation factors, RIS segmentation, and beams’ directions, all subject to stringent quality-of-service (QoS) constraints. Closed-form expressions are derived to facilitate efficient implementation and performance optimization. Simulation results validate closed-form solutions and demonstrate that the proposed scheme can significantly enhance SC compared to benchmarks where RIS and AN are used separately, with the proposed scheme achieving approximately 81% greater capacity than the “RIS-Only” approach and a substantial advantage over the “AN-Only” approach, which results in no secrecy. Additionally, this work includes an analysis of energy efficiency, emphasizing the critical importance of optimizing power consumption in practical applications. This dual focus on improving security while effectively managing energy resources underscores the scheme’s practical relevance and efficiency.
Text
Hanadi_TWC_Final_Version
- Accepted Manuscript
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e-pub ahead of print date: 15 October 2025
Additional Information:
Publisher Copyright:
© 2002-2012 IEEE.
Keywords:
Artificial noise, energy efficiency, full-duplex, optimization, partitioning, physical layer security, power control, reconfigurable intelligent surface, secrecy capacity
Identifiers
Local EPrints ID: 509677
URI: http://eprints.soton.ac.uk/id/eprint/509677
ISSN: 1536-1276
PURE UUID: 7030cbc5-6b9c-4d4c-9c72-b4d845458720
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Date deposited: 02 Mar 2026 17:38
Last modified: 03 Mar 2026 03:19
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Contributors
Author:
Hanadi Salman
Author:
Abdulkadir Celik
Author:
Sultangali Arzykulov
Author:
Ahmed M. Eltawil
Author:
Huseyin Arslan
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