Data Encryption Standard (DES) for Encryption of Information using Wireless Sensor Network

The wireless sensor networks (WSN) consists of several autonomous sensor nodes with sensing, processing and wireless communication capabilities. Sensor network is considered as the critical network because of limited availability of resources in terms of sensing range, memory, energy specification etc. These sensor nodes are distributed spatially to monitor physical and environmental conditions, such as temperature, pressure, humidity, vibration, sound, motion or pollutants and cooperatively send the sensed data to the end user through the network. In this work, the sensor network security issues are resolved in clustered network when a new node enters to the network. Two stage authenticated communication is defined. The first level authentication is applied between the base station and the cluster head. In this process the public key cryptography is applied for the aggregative communication. The base station generates the public key and private key pair for each cluster head. The public key is shared to the cluster head and the private key is kept by base station. In this work, the DES approach of cryptography is used as the secure communication mechanism between base station and cluster head.