What right is that?  Where does a right to "secrecy" come from?  Not the Constitution.  The 5th amendment does not grant a right to protect statements made to others.  The protection afforded confessions is contained in the rules of evidence and statutes.  Similar protections once protected statements made to doctors and therapists.  You are completely off the mark in attempting to make this some sort of constitutional right.  There is no right to "secrecy."