Attorney–client privilege

Attorney–client privilege or lawyer–client privilege is the common law doctrine of legal professional privilege in the United States. Attorney–client privilege is "[a] client's right to refuse to disclose and to prevent any other person from disclosing confidential communications between the client and the attorney." The attorney–client privilege is one of the oldest privileges for confidential communications.

Source: Wikipedia — Attorney–client privilege (CC BY-SA 4.0)