CIA refers to the security attributes of confidentiality, integrity, and availability. Also commonly known as the CIA triad, it is a security model which is used to guide securing systems. Possible breach of a single attribute of the three can mean that a system has not been secured to a sufficient level.

Although the CIA triad is probably the most well known of all the security models, others also exist. One of the most popular alternatives, for example, is the Parkerian Hexad, which includes additional attributes.


Last updated: 8 October 2017