Abstract-Wireless sensor networks routing protocols always neglect security problem at the designing step, while plenty of solutions of this problem exist, one of which is using key management. Researchers have proposed many key management schemes, but most of them were designed for flat wireless sensor networks, which is not fit for cluster-based wireless sensor networks (e.g. LEACH). In this paper, we investigate adding security to cluster-based routing protocols for wireless sensor networks which consisted of sensor nodes with severely limited resources, and propose a security solution for LEACH, a protocol in which the clusters are formed dynamically and periodically. Our solution uses improved Random Pair-wise Keys (RPK) scheme, an optimized security scheme that relys on symmetrickey methods; is lightweight and preserves the core of the original LEACH. Simulations show that security of RLEACH has been improved, with less energy consumption and lighter overhead. Routing protocols for wireless sensor networks (WSNs) [1] are classified as data-centric (flat) protocols, hierarchical (cluster-based) protocols and location-based protocols. Routing protocols for cluster-based WSNs [2, 3, 4] propose that, all of nodes are divided into a certain number of clusters, and each cluster chooses a cluster head (CH). Member nodes in each cluster send data collected to the CH, and the CH aggregates this coming data followed by sending it to base station (BS). The selection of CH on routing protocols for cluster-based WSNs always follows the "round" strategy, which improves network's energy efficient. From the security's whole ground of view, LEACH (Low Energy Adaptive Clustering Hierarchy) is not secure enough, since it has no ability to resist some attacks in network layer. In this paper, we add security to LEACH by using key management scheme. Researchers have proposed a number of key management schemes [5, 6, 7, 8, 9] for WSNs. Most of the key management schemes assume the relationship between nodes is fixed, while clusters as well as the relationship between nodes in hierarchical protocol are dynamical, so these schemes designed for flat networks are not suitable for routing protocol for cluster-based WSNs. In this paper, we show how random pairwise keys (RPK) scheme [6] can be used in secure communication in hierarchical (cluster-based) routing protocols such as LEACH. RPK
Again to provide effective solution for secure communication in LEACH, RLEACH REF has been introduced with improved random key pre-distribution scheme.
A Secure Routing Protocol for Cluster-Based Wireless Sensor Networks Using Group Key Management
2008 4th International Conference on Wireless Communications, Networking and Mobile Computing
2008 4th International Conference on Wireless Communications, Networking and Mobile Computing
Computer Science