Privacy is not disclosing things to people for whom it is none of their business.
Secrecy is not disclosing things to people for whom it is at least somewhat their business.
Dishonesty is lying, denying, misleading, or going purposely silent when something that is someone else’s already been uncovered.
Privacy is a right. Secrecy is sometimes justified, beneficial, and/or necessary. Dishonesty is for shitbags, but we all do it sometimes.