This book is a detailed methodology of performing a security assessment. The book emphasizes the approach of first understanding the business and then the technology that supports it. It focuses on fundamental process areas of security and provides a methodology for security practitioners to uncover security weaknesses in other existing business processes. With the emphasis on the business driving security, this book presents a standard methodology for performing a security assessment as well as the reasons for doing it that way. It also provides checklists for process-oriented areas of information security to provide detailed guidance that can be used in performing a security assessment.