Charles P. Pfleeger is a master security architect in the Professional Services group of Exodus Communications, Inc., a leading provider of outsourcing solutions for Internet operations. Mr. Pfleeger provides analysis and consulting services for a range of commercial and government customers. His areas of expertise include threat and vulnerability determination for existing IT installations; design analysis for new sites to identify security requirements and plan for controls to contain risk; security analysis of security architectures and recommendation of countermeasures; integration of security techniques during software and systems development; incident detection, analysis, and response; and security of operating systems and networks. Mr. Pfleeger has lectured throughout the world and published numerous papers and books. His book Security in Computing , now in its third edition, is the standard college textbook in computer security. Mr. Pfleeger received a doctorate in computer science from Pennsylvania State University.