From the reviews: "This survey of distributed system security, with applications for the grid security infrastructure, begins with an overview of grid computing, security and the Global Grid Forum's (GGS) grid security infrastructure (GSI). ... The book is well organized; the material is accompanied by both motivational material ... as well as potential solutions. I also appreciate the inclusion of copious description of existing implementations ... . This gives the reader an idea of what is available, and how to elucidate how these systems relate to each other." (W. Hu, Computing Reviews, December, 2007)