基于同态加密的电网隐私数据多维聚合优化算法  

Multi-dimensional aggregation optimization algorithm for power grid privacy data based on homomorphic encryption

作　　者：王凌宇 傅宏 马创 杨云 WANG Lingyu;FU Hong;MA Chuang;YANG Yun(State Grid Chongqing Electric Power Company Marketing Service Center,Chongqing 400015,P.R.China;School of Software Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,P.R.China)

机构地区：[1]国网重庆市电力公司营销服务中心,重庆400015 [2]重庆邮电大学软件工程学院,重庆400065

出　　处：《重庆邮电大学学报（自然科学版）》2023年第2期352-359,共8页Journal of Chongqing University of Posts and Telecommunications(Natural Science Edition)

基　　金：国网重庆营销服务中心项目(SGCQKH00ZHJS2000052)。

摘　　要：针对智能电网实时采集用户用电数据聚合上传通信过程中存在的计算效率低、传输不安全、泄露用户隐私等问题,提出了一种基于同态加密的电网隐私数据多维聚合优化算法。利用基于盲因子技术的Paillier加密算法对多维数据进行整体加密和签名,并向聚合器报告加密后的密文和签名;采用双线性配对方案,对签名后的数据进行签名验证分析;利用Paillier加密算法的同态特性实现数据聚合。安全性分析证明,该算法解密安全且能抵抗外部攻击和内部攻击,批量验证也具有安全性。实验结果表明,提出的算法与其他4种对比算法相比不仅计算效率较优,而且通信效率也较优;与基于身份的同态方案相比,该方案的数据签名和签名验证所花费的时间分别可平均降低约510 ms和187 ms,在数据通信过程中所花费的时间平均降低了约449 ms。In order to solve the problems such as low computing efficiency,unsafe transmission,and privacy disclosure in the process of real-time collection of users’electricity data by smart grid,aggregation and upload communication,this paper proposes a multidimensional aggregation optimization algorithm for power grid privacy data based on homomorphic encryption.Paillier encryption algorithm based on blind factor technology is used to encrypt and sign multidimensional data as a whole,and the encrypted ciphertext and signature are reported to the aggregator.Bilinear pairing scheme is used to verify the signature of the signed data.The homomorphism of Paillier encryption algorithm is used to realize data aggregation.The security of the algorithm is analyzed,and the decryption security of the algorithm is proved in detail and it can resist external and internal attacks,and the batch verification security of the proposed algorithm is verified.Experimental results show that the proposed algorithm has better computational efficiency and communication efficiency than the other four algorithms.Compared with the id-based homomorphic scheme,the data signature time and signature verification time are reduced by about 510 ms and 187 ms on average,respectively,and the time spent in data communication is also reduced by about 449 ms on average.

关 键 词：同态加密 盲因子 签名 双线性配对 

分 类 号：TN915.08[电子电信—通信与信息系统] TP309.2[电子电信—信息与通信工程]