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On the physical layer security of untrusted millimeter wave relaying networks: a stochastic geometry approach

On the physical layer security of untrusted millimeter wave relaying networks: a stochastic geometry approach
On the physical layer security of untrusted millimeter wave relaying networks: a stochastic geometry approach
The physical layer security (PLS) of millimeter wave (mmWave) communication systems is investigated, where the secure source-to-destination communication is assisted by an untrusted relay selected from a group of them and there are also several passive eavesdroppers (Eves) in the network. In the considered system model, while the distributions of the untrusted relays and Eves follow a homogeneous Poisson Point Process (PPP). To maximize the instantaneous secrecy rate, a novel joint relay selection and power allocation (JRP) method is developed where the destination and source aim for jamming the reception of both the untrusted relays and passive Eves. New expressions of the optimal power allocation (OPA) are derived for both non-colluding
Eves (NCE) and colluding Eves (CE). Subsequently, by considering the impact of potential blockages, new closed-form equations are derived for analyzing the system’s ergodic secrecy rate (ESR) and secrecy outage probability (SOP) for transmission over fading mmWave channels. Finally, numerical examples are provided for demonstrating the superiority of our proposed JRP method over the relevant benchmarks found in the literature. Interestingly, the ESR increases with the density of untrusted relays for both the NCE and CE scenarios, which is a benefit of the improved probability of selecting a relay with a stronger second-hop channel. Furthermore, in the low transmit power regime, employing relatively low mmWave frequencies achieves better ESR, while in the high transmit power regime, high mmWave frequencies provide higher ESR.
1556-6013
53 - 68
Ragheb, Mohammad
a9962925-07a2-4360-bf68-e73f81dfd64b
Safavi Hemami, S. Mostafa
c3eb1e5c-9140-4414-a234-45d6656dd142
Kuhestani, Ali
9b54cde7-a788-414e-aeef-22718e914a27
Ng, Derrick Wing Kwan
8e2a32d3-cb0d-4c38-b05c-03ef16a5c707
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
Ragheb, Mohammad
a9962925-07a2-4360-bf68-e73f81dfd64b
Safavi Hemami, S. Mostafa
c3eb1e5c-9140-4414-a234-45d6656dd142
Kuhestani, Ali
9b54cde7-a788-414e-aeef-22718e914a27
Ng, Derrick Wing Kwan
8e2a32d3-cb0d-4c38-b05c-03ef16a5c707
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1

Ragheb, Mohammad, Safavi Hemami, S. Mostafa, Kuhestani, Ali, Ng, Derrick Wing Kwan and Hanzo, Lajos (2021) On the physical layer security of untrusted millimeter wave relaying networks: a stochastic geometry approach. IEEE Transactions on Information Forensics and Security, 53 - 68. (doi:10.1109/TIFS.2021.3131028).

Record type: Article

Abstract

The physical layer security (PLS) of millimeter wave (mmWave) communication systems is investigated, where the secure source-to-destination communication is assisted by an untrusted relay selected from a group of them and there are also several passive eavesdroppers (Eves) in the network. In the considered system model, while the distributions of the untrusted relays and Eves follow a homogeneous Poisson Point Process (PPP). To maximize the instantaneous secrecy rate, a novel joint relay selection and power allocation (JRP) method is developed where the destination and source aim for jamming the reception of both the untrusted relays and passive Eves. New expressions of the optimal power allocation (OPA) are derived for both non-colluding
Eves (NCE) and colluding Eves (CE). Subsequently, by considering the impact of potential blockages, new closed-form equations are derived for analyzing the system’s ergodic secrecy rate (ESR) and secrecy outage probability (SOP) for transmission over fading mmWave channels. Finally, numerical examples are provided for demonstrating the superiority of our proposed JRP method over the relevant benchmarks found in the literature. Interestingly, the ESR increases with the density of untrusted relays for both the NCE and CE scenarios, which is a benefit of the improved probability of selecting a relay with a stronger second-hop channel. Furthermore, in the low transmit power regime, employing relatively low mmWave frequencies achieves better ESR, while in the high transmit power regime, high mmWave frequencies provide higher ESR.

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Accepted/In Press date: 25 October 2021
e-pub ahead of print date: 25 November 2021

Identifiers

Local EPrints ID: 452539
URI: http://eprints.soton.ac.uk/id/eprint/452539
ISSN: 1556-6013
PURE UUID: 8ed4a870-a15b-4ad7-bc1b-84782b5c7ebf
ORCID for Lajos Hanzo: ORCID iD orcid.org/0000-0002-2636-5214

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Date deposited: 11 Dec 2021 11:26
Last modified: 18 Mar 2024 05:15

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Contributors

Author: Mohammad Ragheb
Author: S. Mostafa Safavi Hemami
Author: Ali Kuhestani
Author: Derrick Wing Kwan Ng
Author: Lajos Hanzo ORCID iD

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