This text covers secure network design and implementation, including authentication, authorization, data and access integrity, network monitoring, and risk assessment. Using such recent high profile cases as Target, Sony, and Home Depot, the book explores information security risks, identifies the common threats organizations face, and presents tactics on how to prioritize the right countermeasures. The book discusses concepts such as malignant versus malicious threats, adversary mentality, motivation, the economics of cybercrime, the criminal infrastructure, dark webs, and the criminals organizations currently face.