Information and communications security is a hot topic in private industry as well as in government agencies. This book provides a complete conceptual treatment of securing information and transporting it over a secure network in a manner that does not require a strong mathematical background. It stresses why information security is important, what is being done about it, how it applies to networks, and an overview of its key issues. It is written for anyone who needs to understand these important topics at a conceptual rather than a technical level