The National Security Agency's INFOSEC Assessment Methodology (IAM) provides guidelines for performing an analysis of how information is handled within an organization: looking at the systems that store, transfer, and process information. It also analyzesthe impact to an organization if there is a loss of integrity, confidentiality, or availability. This book shows how to do a complete security assessment based on the NSA's guidelines. This book focuses on providing a detailed organizational information tchnology security assessment using case studies. The Methodology used for the assessment is based on the National Security Agency's (NSA) INFOSEC Assessment Methodology (IAM). Examples will be given dealing with issues related to military organizations, edical issues, critical infrastructure (power generation, etc.). The book is intended to provide an educational and entertaining analysis of an organization, showing the steps of the assessment and the challenges faced during it. It will also provide examles, sample templates, and sample deliverables that readers can take with them to help them be better prepared and make the methodology easier to implement.