Which of the following is NOT one of the five pillars of Cybersecurity?

The concept of the five pillars of cybersecurity typically includes key principles that are essential for protecting information systems and data. These pillars are often referred to through the lens of the CIA triad—Confidentiality, Integrity, and Availability—and also incorporate aspects such as Authentication and Non-repudiation.

In this context, the answer C, Segregation, is not considered one of the foundational pillars of cybersecurity. While segregation (or segmentation) of networks can be a useful practice to manage security in some contexts (often related to network security), it does not capture the core principles that guide the overarching framework of cybersecurity like the other options do.

Authentication ensures that only authorized users can access systems, Integrity ensures that data is accurate and unaltered, and Availability ensures that information and resources are accessible when needed. Therefore, while segregation is an important security practice, it does not represent one of the primary pillars that structure the cybersecurity framework. This distinction reinforces a fundamental understanding of cybersecurity principles.