Confidentiality refers to efforts made to prevent unauthorized disclosure of information to those who do not have the need, or right, to see it. We should always make sure to adhere to the principle of least privilege and only give access to those people who really have a need for it.
Without confidentiality there can be no privacy, which is the ability to selectively reveal information about oneself.
Confidentiality requires authentication, authorization, and auditing.
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