Priority-aware secure precoding based on multi-objective symbol error ratio optimization
Priority-aware secure precoding based on multi-objective symbol error ratio optimization
The secrecy capacity based on the assumption of having continuous distributions for the input signals constitutes one of the fundamental metrics for the existing physical layer security (PHYS) solutions. However, the input signals of real-world communication systems obey discrete distributions. Furthermore, apart from the capacity, another ultimate performance metric of a communication system is its symbol error ratio (SER). In this article, we pursue a radically new approach to PHYS by considering rigorous direct SER optimization exploiting the discrete nature of practical modulated signals. Specifically, we propose a secure precoding technique based on a multi-objective SER criterion, which aims for minimizing the confidential messages' SER at their legitimate user, while maximizing the SER of the confidential messages leaked to the illegitimate user. The key to this challenging multi-objective optimization problem is to introduce a priority factor that controls the priority of directly minimizing the SER of the legitimate user against directly maximizing the SER of the leaked confidential messages. Furthermore, we define a new metric termed as the security-level, which is related to the conditional symbol error probability of the confidential messages leaked to the illegitimate user. Additionally, we also introduce the secure discrete-input continuous-output memoryless channel (DCMC) capacity referred to as secure-DCMC-capacity, which serves as a classical security metric of the confidential messages, given a specific discrete modulation scheme. The impacts of both the channel's Rician factor and the correlation factor of antennas on the security-level and the secure-DCMC-capacity are investigated. Our simulation results demonstrate that the proposed priority-Aware secure precoding based on the direct SER metric is capable of securing transmissions, even in the challenging scenario, where the eavesdropper has three receive antennas, while the legitimate user only has a single one.
Physical layer security, conditional error probability, mean square error, multiple-input multiple-output, secrecy capacity, secure precoding, symbol error rate, wiretap channel
1912-1929
Zhang, Jiankang
6add829f-d955-40ca-8214-27a039defc8a
Chen, Sheng
9310a111-f79a-48b8-98c7-383ca93cbb80
Wang, Fasong
c748dc10-033c-4fdf-904d-0ddde515462c
Ng, Soon Xin
e19a63b0-0f12-4591-ab5f-554820d5f78c
Maunder, Robert
76099323-7d58-4732-a98f-22a662ccba6c
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
17 March 2021
Zhang, Jiankang
6add829f-d955-40ca-8214-27a039defc8a
Chen, Sheng
9310a111-f79a-48b8-98c7-383ca93cbb80
Wang, Fasong
c748dc10-033c-4fdf-904d-0ddde515462c
Ng, Soon Xin
e19a63b0-0f12-4591-ab5f-554820d5f78c
Maunder, Robert
76099323-7d58-4732-a98f-22a662ccba6c
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
Zhang, Jiankang, Chen, Sheng, Wang, Fasong, Ng, Soon Xin, Maunder, Robert and Hanzo, Lajos
(2021)
Priority-aware secure precoding based on multi-objective symbol error ratio optimization.
IEEE Transactions on Communications, 69 (3), , [9311648].
(doi:10.1109/TCOMM.2020.3048351).
Abstract
The secrecy capacity based on the assumption of having continuous distributions for the input signals constitutes one of the fundamental metrics for the existing physical layer security (PHYS) solutions. However, the input signals of real-world communication systems obey discrete distributions. Furthermore, apart from the capacity, another ultimate performance metric of a communication system is its symbol error ratio (SER). In this article, we pursue a radically new approach to PHYS by considering rigorous direct SER optimization exploiting the discrete nature of practical modulated signals. Specifically, we propose a secure precoding technique based on a multi-objective SER criterion, which aims for minimizing the confidential messages' SER at their legitimate user, while maximizing the SER of the confidential messages leaked to the illegitimate user. The key to this challenging multi-objective optimization problem is to introduce a priority factor that controls the priority of directly minimizing the SER of the legitimate user against directly maximizing the SER of the leaked confidential messages. Furthermore, we define a new metric termed as the security-level, which is related to the conditional symbol error probability of the confidential messages leaked to the illegitimate user. Additionally, we also introduce the secure discrete-input continuous-output memoryless channel (DCMC) capacity referred to as secure-DCMC-capacity, which serves as a classical security metric of the confidential messages, given a specific discrete modulation scheme. The impacts of both the channel's Rician factor and the correlation factor of antennas on the security-level and the secure-DCMC-capacity are investigated. Our simulation results demonstrate that the proposed priority-Aware secure precoding based on the direct SER metric is capable of securing transmissions, even in the challenging scenario, where the eavesdropper has three receive antennas, while the legitimate user only has a single one.
Text
TCOM2021-March
- Author's Original
Text
PHYberSER-2020-12-25-double-final-version
- Accepted Manuscript
More information
Accepted/In Press date: 24 December 2020
e-pub ahead of print date: 31 December 2020
Published date: 17 March 2021
Additional Information:
Funding Information:
Manuscript received April 16, 2020; revised August 2, 2020 and November 1, 2020; accepted December 23, 2020. Date of publication December 31, 2020; date of current version March 17, 2021. This work was supported in part by the Engineering and Physical Sciences Research Council projects EP/N004558/1, EP/P034284/1, EP/P034284/1, EP/P003990/1 (COALESCE), by the Royal Society’s Global Challenges Research Fund Grant, by the European Research Council’s Advanced Fellow Grant QuantCom, as well as in part by the National Natural Science Foundation of China under Grant 61571401 and the Innovative Talent of Colleges and University of Henan Province under grant 18HASTIT021. The associate editor coordinating the review of this article and approving it for publication was H.-M. Wang. (Corresponding author: Lajos Hanzo.) Jiankang Zhang is with the School of Electronics and Computer Science, University of Southampton, Southampton SO17 1BJ, U.K., and also with the School of Information Engineering, Zhengzhou University, Zhengzhou 450001, China (e-mail: jz09v@ecs.soton.ac.uk).
Publisher Copyright:
© 1972-2012 IEEE.
Keywords:
Physical layer security, conditional error probability, mean square error, multiple-input multiple-output, secrecy capacity, secure precoding, symbol error rate, wiretap channel
Identifiers
Local EPrints ID: 445715
URI: http://eprints.soton.ac.uk/id/eprint/445715
ISSN: 0090-6778
PURE UUID: f688cff3-8565-44cc-853d-fb2f853dd5a9
Catalogue record
Date deposited: 06 Jan 2021 17:41
Last modified: 18 Mar 2024 03:14
Export record
Altmetrics
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics
