An Efficient Signcryption Protocol for Hop-by-Hop Data Aggregations in Smart Grids
Zhiyuan Sui, Hermann de Meer · IEEE Journal on Selected Areas in Communications · 2019
Aggregation trees have been proposed for privacy preservation to reduce data collectors' computational cost in smart grids. In aggregation tree models, smart meter usage data should be forwarded by all its ancestors, which delays usage data transmissions. We report the design of an identity-based signcryption protocol without oracles for aggregation trees. The designed protocol significantly reduces smart meter computational costs due to its homomorphic features. (1) Compressed signatures can be verified in batches. The computational cost of verification is independent of the number of usage reports. (2) A smart meter can generate a signature on the aggregated cipher without executing signing algorithms during transmissions. Extensive simulations demonstrate that, based on the proposed protocol, the communication efficiency of our privacy preservation scheme outperforms other aggregation tree-based schemes regarding transmission delay and computational cost.