傅里叶变换下电力系统采样数据加密仿真  

Simulation of Power System Sampling Data Encryption under Fourier Transform

作　　者：钱旭盛 翟千惠 朱萌 张轩城 QIAN Xu-sheng;ZHAI Qian-hui;ZHU Meng;ZHANG Xuan-cheng(State Grid Jiangsu Marketing Service Center(Metrology Center),Nanjing Jiangsu 210000,China)

机构地区：[1]国网江苏省电力有限公司营销服务中心,江苏南京210000

出　　处：《计算机仿真》2024年第11期142-145,290,共5页Computer Simulation

基　　金：国网江苏省电力有限公司科技项目(J2020117)。

摘　　要：电力系统采样数据通常用传感器、仪表等设备采集的电压、电流、频率等具有明显时间序列特性的信号数据。上述数据格式与许多加密算法所处理的数据格式不匹配,因此,无法直接对其进行加密。为了在保障电力系统采样数据安全的同时,高效地分析和处理电力系统中的信号,提出基于傅里叶变换的电力系统采样数据加密方法。使用离散傅立叶变换算法提取电力系统采样数据离散信号频率值,将其转换为可加密数据;对电力系统采样数据的信号频率值进行属性基加密;为进一步确保数据的安全性,在数据属性基加密基础上,通过椭圆曲线加密算法对属性基加密结果实施二次加密,从而实现电力系统采样数据加密。仿真结果表明,利用所提方法开展数据加密时,有效转换了电力系统采样数据,对变换后的电力系统采样数据加密效果较好、泄露风险明显降低。Power system sampling data are usually collected by sensors,meters and other equipment with voltage,current,frequency and other signal data with obvious time series characteristics.This type of data format does not match the data format processed by many encryption algorithms,therefore,it is impossible to encrypt it directly.In order to analyze and process the signals in the power system efficiently while guaranteeing the security of power system sampling data,an encryption method based on Fourier transform is proposed for power system sampling data.The discrete Fourier transform algorithm is used to extract the discrete signal frequency value of the power system sampling data,which is converted into encrypted data;the signal frequency value of the power system sampling data is encrypted by attribute base encryption;in order to further ensure the security of the data,on the basis of the attribute base encryption of the data,the second encryption is carried out by the elliptic curve encryption algorithm on the at-tribute base encryption results,so as to realize the encryption of the power system sampling data.Simulation results show that the data encryption using this method effectively transforms the power system sampling data,and the encryption effect of the transformed power system sampling data is better and the risk of leakage is significantly reduced.

关 键 词：傅里叶变换算法 电力系统 采样数据 属性基加密 椭圆曲线加密算法 

分 类 号：TP309[自动化与计算机技术—计算机系统结构] TP391.9[自动化与计算机技术—计算机科学与技术]