Improvement of Security and Energy Efficiency of a Distributed System in Wireless Sensor Networks

Electronic and Communication Engineering

Wireless reprogramming in a wireless sensor network (WSN) is the process of updating a new code or commands to the sensor nodes. Since wireless network is deployed in hostile environments, secure reprogramming is a major concern. All the existing reprogramming protocols are based on the centralized approach, it is essential to support the distributed approach by which multiple network users can directly updating the sensor nodes. Later, a novel secure and distributed reprogramming protocol named SDRP has been proposed. But it had a design weakness in the user pre-processing phase. It shows that the distributed network can be easily attacked by various users and also the malicious code be updated to the sensor nodes. A simple modification can be carried out in the proposed system by fixing the identified security problem without losing the features of SDRP. Moreover, the security improvement is performed by the identity based signature algorithm (IBS). This algorithm can be directly employed in SDRP. For routing the nodes, the dynamic source routing protocol be employed. Here we also analysis the overhead bits, energy efficiency and delay of the existing and proposed systems.

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