Interdisciplinary means combining knowledge from different fields to solve one problem. In cyber security, that often means mixing technical skills such as networking, malware analysis, and cloud administration with human, legal, and operational knowledge such as psychology, privacy law, and business risk. Cyber incidents rarely stay inside one discipline: an attacker may use social engineering to trick a user, exploit a software weakness, and then move through a network, so defenders need more than one kind of expertise to detect, contain, and recover.
This matters because strong security depends on coordination. Incident response teams may include engineers, analysts, lawyers, and communications staff so they can preserve evidence, meet reporting duties, and reduce damage at the same time. The same approach helps in defense planning, where threat modeling, user training, access control, and policy design must work together. In practice, interdisciplinary security is about building systems and teams that understand both the technology and the people who use it.