Whether you're new to the field or looking to broaden your knowledge of contemporary cryptography, this comprehensive resource puts all aspects of this important topic into perspective. Delivering an accurate introduction to the current state-of-the-art in modern cryptography, the book offers you a practical understanding of essential tools and applications to help you with your daily work. You also find complete coverage of the underpinnings and basic principles of cryptography to help you fully master the material.From mathematical fundamentals and an overview of cryptographic systems: to details on unkeyed, secret key, and public key cryptosystems, this authoritative reference gives you solid working knowledge of the latest and most critical concepts, techniques, and systems in contemporary cryptography. Additionally, the book is supported with over 200 equations, more than 60 illustrations, and numerous time-saving URLs that connect you to Web sites with related information.