Chuck Easttom has 15 years' experience in the IT industry and has been an expert witness on several computer-related cases. He is the author of ten computer-science books including two textbooks on computer security. He was also one of the subject matter experts who helped to create CompTIA's Security+ certification test. He has been a frequent guest speaker on computer security at various computer groups and campuses including Harvard and Columbia. He holds more than a dozen computer industry certifications.