In this paper, we discuss key management challenges for seamless handovers across heterogeneous wireless networks. We focus on utilizing existing keying material from previous access authentications to expedite network entry. For a seamless handover, keys must be available at the target network at the time of the handover. Currently, industry is still exploring possible ways to handle keys for ...

The term wireless sensor network is applied broadly to a range of significantly different networking environments. On the other hand there exists a substantial body of research on key establishment in wireless sensor networks, much of which does not pay heed to the variety of different application requirements. We set out a simple framework for classifying wireless sensor networks in terms of t...

 A global economic recovery is expected to be ignited in 2010 but this will be characterized by very different growth trajectories among advanced and emerging economies. The downside risks are formidable. Sustaining this recovery will require skillful macroeconomic management. Exit strategies for fiscal stimulus will need to be carefully timed and credible fiscal consolidation plans nee...

A wireless sensor network is a collection of devices limited in lowpowered batteries, processing, communication bandwidth capabilities and low memory availability. Due to these constraints, most of security approaches used in wired networks cannot be applied directly in this environment. In this work, we present a hybrid protocol that treats the group key management scheme and the transparent c...

The paper proposes key management between two parties, based on set of multimedia files shared by sender and recipient. The method is simple, fast, secure and robust. Possible key sizes are virtually limitless. One implementation, which uses YouTube website as a source of multimedia files, is presented.

Wireless sensor networks consist of sensor nodes with limited computational and communication capabilities. In this paper, the whole network of sensor nodes is divided into clusters based on their physical locations. In addition, efficient ways of key distribution among the nodes within the cluster and among controllers of each cluster are discussed. Also, inter and intra cluster communications...

Nowadays, Wireless Sensor Networks are a hot research topic in the scientific community. Researchers seek to maximize their autonomy while paying attention to their limited resources, few computing capacity and low energy consumption. Security mechanisms must be deployed in the architecture of almost all Wireless Sensor Networks. Several research papers have verified that group-based communicat...

The aim of this paper is to show some solutions for key management in ad hoc networks. The major problem in providing security services in such infrastructure less networks is how to manage the cryptographic keys that are needed. In order to design practical and sufficient key management systems it is necessary to understand the characteristics of ad hoc networks and why traditional key managem...