Abstract:
IP Multimedia Subsystem (IMS), an architectural framework for Next Generation
Networks (NGN) planes to converge all the networks and services on one IP based
platform. IMS application plane consists of various types of application servers those
provides different types of services. These Services include Presence, Instant
Messaging, Push to talk over cellular, multiparty conference etc. IMS application
server and other servers are subject to various types of security threats including time
dependent and time independent attacks. Moreover currently available service
features are not enough to meet the needs of daily life communication. To secure the
application plane we proposed a signature based role oriented Intrusion Detection and
Prevention (IDP) system. An anomaly detection module is also added to increase the
level of security. We also proposed few other solutions those add security in IMS
application plane. These solutions include User preferences based instant messaging,
presence based instant messaging, election based referring, location based deletion of
malicious users etc. To enrich the IMS based multimedia services we developed
different solutions for different services and these solutions include presence enabled
call setup, media mixing through presence information, floor control mechanism,
parameterized referring, election based right allocation mechanism etc. To test the
developed solution we create an IMS testbed by using open source solutions.
Prototypes of services are also developed. The results are obtained by implementing
the proposed solution over the testbed. It is observed that the proposed solutions
enhances the security of IMS based services, and include value added features to
make them feasible for more daily life scenarios.
