About the Author Moshe Rozenblit has been a key figure in the formulation of TMN security for the past six years. His career in telecommunications started 24 years ago at AT&T Bell Laboratories and continued at Bellcore and NYNEX Science and Technology. Currently Dr. Rozenblit is a senior engineer for network management and related standards at Telcordia Technologies. He is the chair and cochair of two North American groups charged with developing TMN security standards and implementation guidelines. Dr. Rozenblit is the editor (or coeditor) and major contributor of several standards for TMN security, both international and North American. He is a frequently invited speaker on TMN security at major industry forums and leading universities. Dr. Rozenblit holds two U.S. patents and is the recipient of several recognition awards from Bell Laboratories, the Alliance for Telecommunications Industry Solutions, and the Telecommunications Industry Forum.