System security is the practice of protecting computer systems and networks from unauthorized access, damage, or disruption. This involves implementing various measures, such as firewalls, encryption, and intrusion detection systems, to prevent attacks from hackers, malware, and other threats. System security also includes regular monitoring and updating of security protocols to ensure the ongoing protection of sensitive information and critical systems. Additionally, system security often involves user authentication and access control to manage and restrict user privileges within a system. Overall, system security is essential for maintaining the integrity, confidentiality, and availability of data and resources within an organization.