Security of Multimedia services using WLAN access technology

The IP Multimedia Subsystem (IMS) is a promising technology, designed to provide IP based telephony and real-time multimedia services. The 3 GPP specifications define a complex IMS architecture for the convergence of voice, video and data. It enables provisioning variety of multimedia services, such VoIP, video streaming, conferencing, instant messaging, web browsing, e-mail, push-to-talk, online gaming or IP television. IMS is almost independent on the access technology and uses many application protocols. These features allow operators to deploy new customer-care and business models. It would by impossible to do this, without having solved the issues of security and management of subscriber credentials. In this article, we describe the IMS architecture, WLAN access technology and possibilities to securely access application servers. Finally, we propose a test bed for integration and testing of SIP and non-SIP based services and evaluate the advantages of proposed scenario, from operatorspsila and customerspsila point of view.