DR 4-101 Preservation of Confidences and Secrets of a Client.
A. "Confidence" refers to information protected by the attorney-client privilege under applicable law, and "secret" refers to other information gained in the professional relationship that the client has requested by held inviolate or the disclosure of which would be embarrassing or would be likely to by detrimental to the client.
B. Except when permitted under DR 4-101(C), a lawyer shall not knowingly:
C. A lawyer may reveal:
D. A lawyer shall exercise reasonable care to prevent his employees, associates, and others whose services are utilized by him from disclosing or using confidences or secrets of a client, except that a lawyer may reveal the information allowed by DR 4-101(C) through an employee.