Ace the Certified Information Systems Auditor Exam 2025 – Audit Your Way to Success!

The primary objective of security controls is to ensure the protection of confidentiality, integrity, and availability, commonly referred to as the CIA triad. These three fundamental principles are essential for securing information systems.

Confidentiality involves ensuring that sensitive information is only accessible to those authorized to see it, thereby preventing unauthorized access. Integrity refers to maintaining the accuracy and completeness of data, ensuring that information is not altered or tampered with. Availability ensures that information and systems are accessible when needed by authorized users, minimizing downtime and disruptions.

While the other options may have relevance in different contexts, they do not encapsulate the core purpose of security controls. Continuous increase of costs does not serve a beneficial role in an information system's operations and management. The creation of user accounts is an administrative task rather than a security control objective. Expansion of the system’s reach, while potentially beneficial for business growth, does not directly pertain to the objectives of maintaining security within an information system.