For one-semester courses on Network Security for computer science, engineering, and CIS majors. This text provides a practical, up-to-date, and comprehensive survey of network-based and Internet-based security applications and standards. It includes a concise section on the discipline of cryptography--covering algorithms and protocols underlying network security applications, encryption, hash functions, digital signatures, and key exchange. Visit Stallings Companion Website at http://williamstallings.com/NetSec/NetSec3e.html for student and instructor resources and his Computer Science Student Resource site http://williamstallings.com/StudentSupport.html Password protected instructor resources can be accessed here by clicking on the Resources Tab to view downloadable files. (Registration required) Supplements Include: Solutions Manual, Power Point slides and Projects.