Clifton L. Smith, PhD is a retired Associate Professor of Security Science in the School ofEngineering, Edith Cowan University, Perth, Western Australia. He developed their SecurityScience programs (BS, MS, and PhD) beginning in the 1980s, and helped establish theirSecurity Science Research and Test Laboratory. He continues to conduct research in ballisticsimaging, security knowledge and understanding, biometric imaging, and security education.Professor Smith has consulted in Australia, Southeast Asia, UK and India on security trainingprograms, physical security audits, CCTV and infrared surveillance techniques, security lightingevaluation, and perimeter technology testing.David J Brooks, PhD, is Senior Lecturer and research leader at Edith Cowan University,Australia, teaching and researching Security Science. Dr. Brooks specializes in securityknowledge structure, security risk management and security technology. Past positions includethe Australian Defence Force West Australian Infrastructure Plant Contract Manager, SeniorSecurity Consultant with AMLEC House consulting group and others, and military service in theRoyal Air Force, Air Defence group. Current research involves developing the theory of entropicsecurity decay, defeat testing of security technology, use of resilience as an aid to NationalSecurity Vetting and Building Management System vulnerabilities.