Joint Covert and Secure Communications for Intelligent Reflecting Surface (IRS)-Aided Wireless Networks

• Published in: 2023 International Conference on Networking and Network Applications (NaNA) pp. 138 - 142
• Main Authors: Yang, Yihuai, Shen, Shikai, She, Yumei, Wang, Wu, Yang, Bin, Gao, Yangshui
• Format: Conference Proceeding
• Language: English
• Published: IEEE 01.08.2023
• Subjects: Body area networks; Computational efficiency; covert communication; covert rate; Intelligent reflecting surface(IRS); Optimization; secrecy rate; successive convex approximation; Wireless networks
• DOI: 10.1109/NaNA60121.2023.00031

This work investigates joint covert and secure communications via intelligent reflecting surface (IRS) in a non-line-of-sight (NLOS) wireless network in the presence of an eavesdropper and a warden. We consider a coordinator of Ben communicates with two users, where one user requires secure communication and the other seeks covert communication. An optimization problem is proposed to maximize the covert rate subject to the constraints of covert requirement, secure communication rate, amplitudes and phase shifts of reflecting elements, and transmit powers of secure and covert communications. We use the successive convex approximation(SCA) method to solve this problem. The numerical results illustrate the effectiveness of utilizing an IRS and highlight the impact of the number of reflecting elements on enhancing communication quality.