Which of the following statements accurately describes the purpose of cyber security?

The purpose of cyber security is fundamentally to protect systems from unauthorized access and attacks. This encompasses a wide range of activities and measures designed to safeguard sensitive information, maintain the integrity of systems, and ensure the availability of services. Cyber security involves protecting data and networks from breaches, theft, and damage, which can result from various threats such as malware, phishing, and hacking. By implementing strong security measures, organizations can effectively defend against potential risks and vulnerabilities that could lead to significant harm, both financially and reputationally.

While other options touch on important elements related to computing—like resource sharing, identity management, and software installation—they do not encompass the overarching aim of cyber security, which is to create a protective barrier around systems and data. These functions are important but are typically considered subcomponents or specific tasks within the broader context of cyber security.