Information Security

Step 1: Understanding the CIA triad.
The CIA triad stands for Confidentiality, Integrity, and Availability. It is a model for information security. Authenticity is not part of this triad.

Step 2: Analysis of options.
- (A) Integrity: Integrity is a key component of the CIA triad.
- (B) Availability: Availability is another key component of the CIA triad.
- (C) Authenticity: Authenticity is not part of the CIA triad.
- (D) Confidentiality: Confidentiality is one of the main components of the CIA triad.

Step 3: Conclusion.
The correct answer is (C) Authenticity.