Wireless Sensor Networks (WSNs) consists of sensor nodes (SNs) which are deployed in hostile areas to monitor the environmental* or physical conditions such as temperature, sound, pressure etc. WSNs are used in military operations, civilian operations, forest fire detection and healthcare monitoring etc. These SNs forwards their sensor data via multi-hop wireless paths to the Base Station (BS) and are assembled with limited energy, resource, and memory and communication range. We consider base station to be highly secure, unlike sensor nodes which are threat prone. We assume that the attacker can extract security credentials from the compromised nodes. As these sensor nodes are resource constraint, so the number of hops required sending data from event region to base station needs to be reduced. Moreover, as the sensor nodes have limited memory so the number of keys to be stored on these sensor nodes needs to be reduced. This paper basically focuses on reducing the path length of an event region to the base station as well as reducing the number of keys. We also calculate the number of suspicious nodes and cells in the network.

Sensor nodes, security, key management, data gathering, wireless sensor networks

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