Covert sensing is a research area that focuses on the development and implementation of technologies and techniques for gathering information or data without the knowledge or consent of those being monitored. This can include methods for surreptitiously recording audio or video, tracking locations, and monitoring other types of data. Covert sensing technologies are often used for surveillance, intelligence gathering, and law enforcement purposes, but also have potential applications in areas such as healthcare, environmental monitoring, and human-computer interaction. Researchers in covert sensing seek to improve the accuracy, efficiency, and ethical implications of these technologies while also considering issues related to privacy, security, and legal implications.