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Donald L. Pipkin, CISSP, is a Security Architect at Hewlett-Packard with 18 years of experience in the industry. He is the author of "Halting the Hacker: A Practical Guide to Computer Security" and "Information Security: Protecting the Global Enterprise," and is a frequent speaker on security. He is versed in all aspects of security, including policy and procedures, and has hands-on experience with computer intrusions.