ED SKOUDIS is a computer security consultant with International Network Services. Ed's expertise includes hacker attacks and defenses, the information security industry, and computer privacy issues. He has performed numerous security assessments, designed secure network architectures, and responded to computer attacks. A frequent speaker on issues associated with hacker tools and effective defenses, Ed has published several articles, as well as the highly acclaimed Counter Attack: A Step-by-Step Guide to Computer Attacks and Effective Defenses (Prentice Hall PTR, 2001).