IPv6 Network Mobility

Network Authentication, Authorization, and Accounting has been used since before the days of the Internet as we know it today. Authentication asks the question, “Who or what are you?” Authorization asks, “What are you allowed to do?” And fi nally, accounting wants to know, “What did you do?” These fundamental security building blocks are being used in expanded ways today. The fi rst part of this two-part series focused on the overall concepts of AAA, the elements involved in AAA communications, and highlevel approaches to achieving specifi c AAA goals. It was published in IPJ Volume 10, No. 1[0]. This second part of the series discusses the protocols involved, specifi c applications of AAA, and considerations for the future of AAA

Future Open Mobile Services

The major barriers for the success of mobile data services are the lack of comprehensible mobile service architectures, their confusing business models and the complexity combined with the inconsistency of the technology enablers. This paper attempts to present a more structured and comprehensive analysis of the current mobile service architectures and their technology enablers. The paper starts with a thorough study of the evolution of mobile services and their business models, and a collection of expectations of the different actors, including the end-user. Next, starting from the original mobile services architecture and environment, an attempt to place the different technology enablers in relation to each other and in relation to their position in the mobile system, will be carried out. Each technology enabler together with their contribution in the enhancement of mobile services are then summarised in a complete and comprehensive way. The paper concludes with a recapitulation of the achievement of the state-of-the-art technology enablers and an identification of future improvements

Implementation of federated identity in multimedia messaging service using Liberty technology

Multimedia messaging services (MMS) enrich the user experience and create a major new source of revenue for network operators as well as for content and service providers. The capability of multimedia messaging service center (MMSC) in delivering different types of digital content, such as music, images, and video, presents a huge opportunity for its use in mobile e-commerce. But in current e-commerce, separate logins are needed to access different service providers. This limitation prevents MMS to closely cooperate with other service providers. The Liberty Alliance standards are intended to solve the problem of signing on repeatedly for each service provider. The Liberty Alliance defines the specifications to share identity information across service providers. However, these specifications have not been integrated into MMS. This thesis is concerned with the design of a system wherein the MMS works with other service providers, MMS acting as Identity provider. When the user federates his/her account in MMS with the account at any of the service providers, he/she can send a service request to a service provider (SP) without being asked for his/her password with the service provider, and at the same time can have access to the MMS from web page of that service provider. To demonstrate the feasibility of this design, a simulation system in compliance with Liberty single sign-on and federation protocol is developed in Java using a single service provider based on Liberty identity federation framework (ID-FF