A Survey on Secure WiFi Sensing Technology: Attacks and Defenses

As a key enabling technology of the Internet of Thing (IoT), WiFi sensing has undergone noteworthy advancements and brought significant improvement to prevailing IoT systems and applications. The past few years have witnessed growing efforts in WiFi sensing, which is widely applied in various applications, such as indoor localization, human activity recognition, physiological signal monitoring, and so on. However, these techniques are also maliciously used by attackers to eavesdrop on legitimate users and even tamper the sensing results. Fortunately, these attack techniques in turn promote the advancement of WiFi sensing techniques, especially defense techniques. In this study, we carried out a comprehensive survey to systematically summarize the works related to the topic of attacks and defenses on WiFi sensing technology. Firstly, we summarize the existing surveys in related areas and highlight our unique novelty. Then, we introduce the concept of the core topic of this survey and provide a taxonomy to distinguish different kinds of attack and defense techniques, respectively, that is, active and passive attack techniques as well as active and passive defense techniques. Furthermore, existing works in each category are grouped and introduced in detail, respectively.