Secure scheme during vertical handoff in integrated heterogeneous wireless systems

An integrated heterogeneous wireless system (IHWS) combines different wireless access technologies together and provides a user with ubiquitous network connectivity. Security in such network is extremely critical for its successful implementation. However, each underlying network in an IHWS has a unique security scheme that cannot be adopted by other networks. Several security algorithms that have been proposed, aim at achieving inter-network security but fail to address mobility and scalability requirements of the network. In this paper, we propose a novel security scheme that addresses the limitations in the existing security protocols for IHWS networks and prove its efficiency through extensive simulations.