Key Retrieval Mechanism for Data Aggregation in IPKE Managed WSN

Establishment of pairwise keys in wireless sensor networks is a fundamental security service, which forms the basis of other security services such as authentication and encryption. However, due to the resource constraints on sensor nodes, establishing pairwise keys in wireless sensor networks is not a trivial task. For the existing key pre-distribution schemes, as the number of compromised nodes increasing, the fraction of affected pairwise keys will increase quickly. As a result, a small number of compromised nodes may affect a large fraction of pairwise. The main purpose of providing security for node is to send data to sink node securely. In existing scheme IPKE node to node delivery is secured but if any node is compromised then data passing through it is also visible to attacker. This problem can be solved if a tunnel is formed between source node and sink node. In this case no intermediate node can interpret data as it is encrypted with the key shared by source node and sink node.