Highly Secure and Flexible Authentication Scheme for Ad hoc Wireless Sensor Networks

In Wireless Sensor Network, when user wants to access the data at sensor node at that time user should be authorized. There are many malicious users in network. In previous systems, there are chances of many network attacks like node capture, stolen smart card attack, sensor node spoofing attack, stolen verifier attack, and fails to ensure backward secrecy. To overcome these attacks and to prevent our sensor, sensor data, and Network from malicious users, we proposed a secure, efficient, flexible Authentication Scheme for WSN.