Dr. Christos K. Georgiadis is an Assistant Professor at the Department of Applied Informatics, University of Macedonia – Thessaloniki – Greece. He received his Ph.D. in Information Systems Security - Access Control for Web Data Bases from the Aristotle University of Thessaloniki. His research interests include the areas of e-commerce and m-commerce technologies, e-security, and web services supporting technologies. Research productivity is summarized in various articles in cooperation with other researchers, in international journals and international conferences proceedings. He has participated in several Research Projects in Greece and in European Union related to information systems security and e-health. He is a reviewer of several international journals and conferences related to e-commerce and Web technology. He is also a tutor of the Hellenic Open University. He is a professional member of ACM, and the SIGEcom.