About the Editor

John Vacca is an information technology consultant and bestselling author based in Pomeroy, Ohio. Since 1982 John has authored 60 books. Some of his most recent works include Biometric Technologies and Verification Systems (Elsevier, 2007); Practical Internet Security (Springer, 2006); Optical Networking Best Practices Handbook (Wiley-Interscience, 2006); Guide to Wireless Network Security (Springer, 2006); Computer Forensics: Computer Crime Scene Investigation, 2nd Edition (Charles River Media, 2005); Firewalls: Jumpstart for Network and Systems Administrators (Elsevier, 2004); Public Key Infrastructure: Building Trusted Applications and Web Services (Auerbach, 2004); Identity Theft (Prentice Hall/PTR, 2002); The World’s 20 Greatest Unsolved Problems (Pearson Education, 2004); and more than 600 articles in the areas of advanced storage, computer security, and aerospace technology. John was also a configuration management specialist, computer specialist, and the computer security official (CSO) for NASA’s space station program (Freedom) and the International Space Station Program from 1988 until his early retirement from NASA in 1995.