Intrusion Resilient Concealed Data Aggregation in Wireless Sensor Networks

摘要

The primary objective of Concealed Data Aggregation (CDA) is to preserve privacy while performing enroute data aggregation. Privacy Homomorphism (PH) techniques facilitate the development of concealed data aggregation protocols that enable end-to-end encryption in wireless sensor networks. Nevertheless, these protocols do not satisfy other security requirements such as integrity, authentication and data freshness and are vulnerable to various attacks. In this paper, we propose the novel Intrusion Resilient Concealed Data Aggregation (IRCDA) protocol for secure in-network data aggregation. This protocol employs privacy homomorphism techniques to achieve data privacy and combines them with homomorphic digital signatures to protect the integrity of the aggregated result. In addition, the proposed approach is resilient against node compromise attacks, an attack that devastates the function of Wireless Sensor Networks (WSNs). Security analysis and performance evaluation show that ours is the first work which remains secure even after compromising many sensor nodes and base station though not simultaneously. It completely mitigates the harmful effect caused by key exposure. Moreover, our protocol incurs very less communication overhead with slight increase in computation which is negligible when compared to communication cost and thereby it prolongs the lifetime of the network. The results prove that IRCDA performs better than most of the existing techniques in providing security to the process of data aggregation.