The attorney-client privilege is one of the oldest recognized privileges protecting confidential communications between two parties. While the privilege serves as the cornerstone of the attorney-client relationship, the privilege is waived when confidential communications are disclosed to third parties. In fact, the “subject-matter waiver” doctrine holds that where a privileged communication concerning a particular subject is voluntarily disclosed to a third party, waiver of the attorney-client privilege extends to all other communications pertaining to the ...