Nodes in a wireless sensor network are susceptible to various attacks primarily due to their
nature of deployment. Therefore, providing security to the network becomes a big challenge.
We propose a scheme considering cluster architecture based on LEACH protocol to build a
security mechanism in a query-processing paradigm within wireless sensor network. The
scheme is capable of thwarting replay attack while ensuring essential properties of security
such as authentication, data integrity and data freshness. Our scheme is lightweight as it …