Significant Storage on Sensor Storage Space, Energy Consumption and Better Security Based on Routing in Hybrid Sensor Networks
Kuda Nageswara Rao · International Journal of Ad hoc Sensor & Ubiquitous Computing · 2011
WSNs are characterized by limited resources in terms of communication, computation and energy supply.A critical constraint on sensors networks is that sensor nodes employ batteries.A second constraint is that sensors will be deployed unattended and in large numbers, so that it will be difficult to change or recharge batteries in the sensors .The Energy Consumption in wireless sensor networks varies greatly based on the protocols the sensors use and computations used to generate keys for communication among neighbor nodes.Previous research on sensor network security mainly considers homogeneous sensor networks, where all sensor nodes have the same capabilities.Research has shown that homogeneous ad hoc networks have poor performance and scalability.The many-to-one traffic pattern dominates in sensor networks, and hence a sensor may only communicate with a small portion of its neighbors.Key Management is a fundamental security operation.Most existing key management schemes try to establish shared keys for all pairs of neighbor sensors, no matter whether these nodes communicate with each other or not, and this causes large overhead and more energy consumption and more storage requirement.In this paper, we adopt a Hybrid Sensor Network (HSN) model for better performance and security.We propose a novel routing-driven key establishment scheme, which only establishes shared keys for neighbor sensors that communicate with each other.We utilize Elliptic Curve Cryptography in the design of an efficient key Establishment scheme for sensor nodes.The performance evaluation and security analysis show that our key Establishment scheme can provide better security with significant reductions on communication overhead, storage space and energy consumption than other key Establishment schemes.