Performing Data Aggregation on Encrypted data for Preserving Privacy in WSNs

Energy and Privacy are the two important aspects in the Battery limited wireless sensor networks. Currently adopting hop by hop encryption for privacy preserving protocols are not efficient in terms of the energy and privacy in WSNs because these protocols decrypts and encrypts the data at the aggregator node since the decrypts at every aggregator node consumes more power and it also increases the frequency of the node compromise attack . The proposed privacy conserving protocol adopts the Privacy Homomorphism technique for performing the data aggregation on encrypted data without any significant delays. Hence it reduces the node compromise attack. So there is greater chance of getting meticulous result at the base node with the reduced computation and communication overheads. The protocol used in the proposed scheme for preserving privacy has its applications in the field where time and security are the critical issues such as in the military applications since it ensures privacy, end to end confidentiality, authenticity, data freshness and energy efficiency while performing data aggregation. Our motto is to provide a secure data aggregation scheme which ensures the privacy, authenticity and freshness of individual sensed data as well as the accuracy and confidentiality of the aggregated data without introducing a significant overhead on the energy constrained sensor networks. Keywords— Wireless Sensor Networks; Data Privacy; Data Confidentiality; Authentication; End to end encrypted data Aggregation; Privacy homomorphism; Accuracy; Data Aggregation; Hop by hop encrypted data aggregation; Data Freshness.