International Conference on e-Business and Information System Security (EBISS'2009) is an international forum for researchers and practitioners from academia and industry to present current results and original research in the context of e-business. E-Business is a research area of growing importance, encompassing several areas of theoretical and practical importance. Therefore, we look forward to receive research work and applications on innovative aspects of several areas related to e-Business, including: "Communication and Network Security", "Web and Mobile Business Systems and Services" and "Business and Social Applications". EBISS'2009 Proceedings will be published by IEEE Press. The best papers presented at the conference will be selected for publications in some International Journals which are indexed by SCI or EI.