Often I hear Security and Privacy used interchangeably, here are their definition and an interesting picture that helps explain the differences.
Security is the condition of being protected against danger or loss. In the general sense, security is a concept similar to safety. The nuance between the two is an added emphasis on being protected from dangers that originate from outside. ...en.wikipedia.org/wiki/Security
Privacy is the ability of an individual or group to keep their lives and personal affairs out of public view, or to control the flow of information about themselves. Privacy is sometimes related to anonymity although it is often most highly valued by people who are publicly known. ...en.wikipedia.org/wiki/Privacy