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Researchers show that data aggregation could save energy and bandwidth of the networks. But the unreliability of wireless links will weaken the performance of network aggregation deeply. Based on homomorphic encryption technology and the non-repudiation transmission protocol, a novel approach to protect sensor data secure is proposed. Because of fully using symmetric encryption algorithm, the protocol...
Chadha et al. proposed a group key scheme for wireless sensor networks via local collaboration. A group key was derived from base station's broadcast message and a node's secret. However, there is no authentication in the group key scheme. It is essential to share a reliable group key among the entire nodes even though it results in a little overhead.
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