Privacy Preservation for Smart Grid Multicast via Hybrid Group Key Scheme

Privacy preservation is a crucial issue for smart grid security. With more and more group applications, data and appliances proliferated in smart grid, electricity customers are faced with extended privacy risks. Meanwhile, the natures of smart grid—such as limitation in computation power of smart meters, requirement to be highly reliable, and transformation from a private system to an open one—make privacy preservation a challenging task. In this paper, we propose a group key scheme to safeguard privacy with the supply of availability, efficiency and fault-tolerance. In particular, hybrid architecture is constructed to achieve both fault-tolerance and efficiency with only one set of group key installed. In addition, key trees are sophisticatedly managed in order to reduce the number of exponentiation operations. Experimental results show that our scheme is able to provide significant gains in performance over other privacy preservation methods while effectively preserving the participant’s privacy. Keywordsgroup key, multicast, privacy, reliability, smart