A Sensing-Based Two-Phase Secure ISAC Framework

Zhang Q, Yan S, Zhou X, Shu F, Kwan Ng DW, Schober R (2025)

Publication Type: Conference contribution

Publication year: 2025

Publisher: Institute of Electrical and Electronics Engineers Inc.

Pages Range: 1245-1250

Conference Proceedings Title: 2025 IEEE International Conference on Communications Workshops, ICC Workshops 2025

Event location: Montreal, QC, CAN

ISBN: 9798331596248

DOI: 10.1109/ICCWorkshops67674.2025.11162369

Abstract

This paper develops a two-phase secure integrated sensing and communication (ISAC) framework, where a dual-functional transmitter (Alice) detects the existence of a potential eavesdropper (Eve) as a sensing target in the first phase. In the second phase, Alice adapts her secure transmission strategy based on the sensing outcome of the first phase. A distinct aspect of our proposed two-phase framework is the derivation of the overall effective secrecy rate across both phases. This is achieved by seamlessly incorporating the a priori probability of Eve's presence, the sensing false alarm rate, and the sensing detection probability directly into the effective secrecy rate as weighting coefficients. For system design, we aim to maximize the overall effective secrecy rate subject to Alice's average transmit power remaining below a predetermined threshold. To address the resulting non-convex design problem, an algorithm based on semi-definite relaxation (SDR) and double-layer optimization is proposed. Our numerical results show that the proposed two-phase secure ISAC framework significantly enhances the secrecy rate compared to a conventional physical layer security (PLS) system if Eve is present with a low probability.

Authors with CRIS profile

Shihao Yan Lehrstuhl für Digitale Übertragung (IDC) Robert Schober Lehrstuhl für Digitale Übertragung (IDC)

Involved external institutions

Hainan Medical University (HMU) / 海南医学院 CN China (CN) Anhui Agricultural University CN China (CN) University of New South Wales (UNSW) AU Australia (AU)

How to cite

APA:

Zhang, Q., Yan, S., Zhou, X., Shu, F., Kwan Ng, D.W., & Schober, R. (2025). A Sensing-Based Two-Phase Secure ISAC Framework. In Matthew Valenti, David Reed, Melissa Torres (Eds.), 2025 IEEE International Conference on Communications Workshops, ICC Workshops 2025 (pp. 1245-1250). Montreal, QC, CAN: Institute of Electrical and Electronics Engineers Inc..

MLA:

Zhang, Qi, et al. "A Sensing-Based Two-Phase Secure ISAC Framework." Proceedings of the 2025 IEEE International Conference on Communications Workshops, ICC Workshops 2025, Montreal, QC, CAN Ed. Matthew Valenti, David Reed, Melissa Torres, Institute of Electrical and Electronics Engineers Inc., 2025. 1245-1250.

BibTeX: Download