Key Issues in Building Web-Based Services

Advances in network technology and computing systems are leading to a new model of distributed system. Such a model stems from integration of application and provides users with services that are accessible via a web-based infrastructure regardless of client´s physical location and/or devices. We recognize that even though middleware technologies make easier the diversity and heterogeneity problem, they do not completely solve it. The paper provides general information about key points in building Web-based services such as session management and Web service security.