This paper describes scenarios and services based on Federated Identity technology. The authors emphasize the Single Sign On mechanism, in which a user’s single authentication credential is used to log in once without being prompted to authenticate again to other systems. The overview of Federated Identity and a Federated Identity Management System is presented first. Next, federation approaches used in different fields of human activity are discussed.
A few examples of such domains are presented: E-health, E-government, E-learning, and E-business. Also, two different use cases were proposed: a federated approach for tourism which provide a better service for customers, and in the health care sector, which improves medical service quality and reduces treatment costs. The last section describes the prototype which was implemented and tested in network environment.