How to answer: If an interviewer asks this question, show that you are fluent in the fundamentals of information security. The CIA triad (also known as the AIC triad or CIA triangle) refers to confidentiality, integrity and availability. Take a moment to explain each principle. Confidentiality is the act of keeping information private and only accessible to those with permission. Integrity is ensuring that the data remains unchanged by any outside parties. Availability refers to keeping data accessible.