云雾环境下可验证的隐私保护数据聚合方案OA

With the rapid development of smart grids,cloud-fog computing has emerged as a new computing paradigm supporting various smart grid applications.However,fog nodes provided by third-party companies pose risks of leaking grid users'private information and cannot guarantee the validity of data aggregation results.To address these issues,this paper proposes a verifiable privacy-preserving da-ta aggregation scheme for cloud-fog environments.Firstly,under a cloud-fog computing-based network structure,an efficient symmetric homomorphic encryption algorithm is introduced,and a new data ag-gregation scheme is proposed.Furthermore,to address the untrustworthiness of third-party fog nodes,the linearly homomorphic proxy re-signature technique is improved,and an efficient signature verifica-tion algorithm is designed that verifies both the integrity of transmitted data and the validity of data aggregation results.Security analysis proves that the scheme meets the security requirements of smart grids.Performance experiments demonstrate that,compared with other similar schemes,it achieves lower computational and communication overhead.