Building the E-Service Society is a state-of-the-art book which deals with innovative trends in communication systems, information processing, and security and trust in electronic commerce, electronic business, and electronic government. It comprises the proceedings of I3E2004, the Fourth International Conference on E-Commerce, E-Business, and E-Government, which was held in August 2004 as a co-located conference of the 18th IFIP World Computer Congress in Toulouse, France, and sponsored by the International Federation for Information Processing (IFIP).The book contains recent results and developments in the following areas:E-Government:E-Government Models and Processes, E-Governance, Service Provisioning.E-Business:Infrastructures and Marketplaces, M-Commerce, Purchase and Payment.E-Commerce:Value Chain Management, E-Business Architectures and Processes, E-Business Models.