Security and Privacy in ISAC Systems

Integrated sensing and communication (ISAC) systems have emerged as a key technology in future wireless systems. While it is intuitively expected to considerably improve spectral and energy efficiencies, ISAC also pursues a deeper integration paradigm where the two functionalities are co-designed for mutual benefits. Nevertheless, the dual radar-communication transmission in ISAC systems introduces unique security challenges. On one hand, the probing ISAC signal carries sensitive data information for the communication users (CUs), which offers the opportunity for targets to potentially act as eavesdroppers and detect private information. On the other hand, offering the sensing functionality through the communication network opens up entirely new vulnerabilities to illegitimate sensing. To this end, communication data security and radar privacy must be considered in the design of ISAC. In this chapter, we firstly present a review of the approaches to physical layer security (PLS) from the perspective of the communication system, where we overview artificial noise (AN) designs, and the exploitation of constructive/destructive interference tailored for secure ISAC. We then discuss sensing security and overview early work in the prevention of adversary sensing through ISAC systems.