Confidentiality (glossary entry)
Confidentiality is to be distinguished from secrecy.
Secrecy is a simpler concept, it just means that something is known by one party and not by another.
Confidentiality refers to secrecy for specific purposes. In general, the purpose is to prevent harm or damage of some kind. In other words, confidentiality is a way to accomplish security.
This page was written in the "embarrassingly readable" markup language RHTF, and was last updated on 2018 Feb 04. s.11