Terry Escamilla, PhD, is a Senior Software Architect for IBM Corporation in Boulder, Colorado. He previously worked for Haystack Labs, now part of Network Associates, a leading vendor of intrusion detection products including the Stalker family of products. A well-respected specialist in computer security and software engineering, Dr. Escamilla spent six years with IBM before joining Haystack in 1996. After Haystack was acquired by Trusted Information Systems and then by Network Associates, Dr. Escamilla rejoined IBM to work on e-business solutions.