Which of the following is NOT one of the three main security pillars?

The three main security pillars are integrity, confidentiality, and availability, often referred to as the CIA triad. Integrity ensures that data is accurate and protected from unauthorized alteration. Confidentiality safeguards sensitive information from unauthorized access, ensuring that only those with the right permissions can view or use that data. Availability guarantees that data and resources are accessible to authorized users when needed.

Scalability, on the other hand, refers to the ability of a system to handle growth or increased demand without compromising performance. While scalability may be an important aspect of an overall system design, it does not directly relate to the core principles of information security. Hence, it is not considered one of the main security pillars. Understanding the distinction between these concepts is crucial for grasping the foundational elements of security practices in cloud environments.