Definition
System security refers to the comprehensive set of practices, policies, and technologies implemented to protect computer systems and networks from unauthorized access, use, disclosure, disruption, modification, or destruction. It encompasses the entire lifecycle of a system, from design and development to deployment, operation, and decommissioning, ensuring the confidentiality, integrity, and availability of information assets. In practice, system security involves establishing robust access controls, implementing encryption, performing regular vulnerability assessments, and maintaining up-to-date security patches. This is crucial for maintaining operational continuity, safeguarding sensitive data, and complying with regulatory requirements. For instance, a company implementing multi-factor authentication for all employee logins is a direct application of system security principles. While often discussed alongside network security, system security focuses specifically on the protection of individual endpoints and servers, whereas network security addresses the protection of the communication pathways between them. This concept is a foundational element tested in certifications like CompTIA Security+, CySA+, and CISSP.