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William A. Arbaugh is an assistant professor of computer science at the University of Maryland in College Park, where he conducts research in information systems security. Arbaugh served as a senior computer scientist for the National Security Agency's Office of Research and Technology, and then as senior technical advisor for the Office of Advanced Network Programs. He has many publications to his credit and has delivered papers at security-related conferences such as IEEE, SANS, USENIX, and Comdex.