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

• A. Encryption
• B. Availability
• C. Integrity
• D. Nonrepudiation

Answer: (A)

The main idea here is distinguishing a technique from the formal goals described as cybersecurity pillars. The five pillars typically cited are confidentiality, integrity, availability, authenticity, and nonrepudiation. Encryption is a powerful method used to achieve confidentiality by transforming data so that only authorized parties can read it. It’s a tool or mechanism, not one of the listed goals themselves. That’s why encryption is not considered one of the pillars.

Availability ensures information and systems are accessible when needed. Integrity protects data from unauthorized alteration. Nonrepudiation provides proof of origin and the ability to hold parties accountable for their actions, supporting trust and non-denial of actions. Authenticity verifies identities. Each of these represents a protective goal, whereas encryption is the means to achieve confidentiality.