Digital signature based key management protocol for secure data transfer in dynamic wireless sensor networks

Wireless Sensor Network(WSN) have applications in the field of traffic flow monitoring, military sensing and tracking, here sensory devices move between different locations. In the existing scheme two types of keys are used, private key and public key. Existing protocols access only small size of keys and also it increases overhead. In this paper, we propose a Digital signature based key management protocol for secure data transfer. It is one of the most significant security services provided by cryptography in asymmetric key management. It minimizes overhead by increasing security and also minimizes energy consumption. This protocol is implemented in Network Simulator-2(NS2). Our proposed system is effective in reducing Energy Consumption, False data injection rate and Node failure rate.