Which term refers to the ability of a system to remain accessible to authorized users?

The term that refers to the ability of a system to remain accessible to authorized users is "availability." In the context of information security, availability ensures that systems, services, and data are operational and usable when needed by authorized individuals. This is a critical component of the CIA triad, which encompasses confidentiality, integrity, and availability.

Availability is concerned with minimizing downtime or disruptions, ensuring that users can access necessary resources without issues. When a system maintains high availability, it supports the operational efficiency of organizations and protects against the negative impacts of unplanned outages or attacks that seek to compromise access.

In contrast, integrity pertains to the accuracy and trustworthiness of data, ensuring that information hasn't been altered or tampered with. Confidentiality focuses on protecting sensitive information from unauthorized access. Accountability refers to the ability to trace actions back to the responsible individual or entity, ensuring that there is a record of who did what within a system. While all these terms are essential for a secure system, availability specifically addresses the question of user access.