Best-selling author William Stallings provides a practical survey of both the principles and practice of cryptography and network security. He includes the MOST important and hottest topic in cryptography, the new Advanced Encryption Standard (AES) with an entire chapter devoted to AES. This is the most comprehensive coverage available. The book devotes an entire chapter providing clear, easy-to-read, and comprehensive treatment of this important topic. The previous edition of this book also won the 1999 TAA Award for the best computer science and engineering text of the year, has been completely updated to reflect the latest developments in the field. It has also been extensively reorganized to provide the optimal sequence for self-study. A four-part organization covers conventional encryption, public-key encryption and hash functions, network security practice, and system security. For anyone who wants the state of the art reference for network and computer security.