L. Jean Camp & Stephen Lewis 
Economics of Information Security [PDF ebook] 

Economics of Information Security applies economics not to generate breakthroughs in theoretical economics, but rather breakthroughs in understanding the problems of security. Security, privacy and trusted computing are examined distinctly, using the tools of economics, and as elements of a larger dynamic system. Economics of Information Security is designed for researchers and managers struggling to understand the risks in organizations dependent on secure networks. This book is also suitable for students in computer science, policy and management.