基于数字水印和非对称加密的智能电网用户敏感信息保护方案

• 作 者: 王守相 陈海文 赵倩宇 郭陆阳 邓欣宇 司为国 孙智卿
• 出 处: 中南大学学报（英文版）
• 发表日期: 2022年2期
• 关键词: sensitive information smart grid smart meter asymmetric encryption

作为电力系统工业物联网的重要组成部分,高级量测体系的发展为能源监测、负荷预测和需求响应等服务提供了便利.然而,随着智能电表的广泛安装,隐私泄露的风险越来越大,因为它们同时传输量测和用户敏感数据.为了保证抄表中敏感信息的机密性和真实性,提出了一种基于数字水印和椭圆曲线密码非对称加密的隐私保护方案.敏感数据使用公钥加密,通过数字水印隐藏在电表读数中.只有授权用户才能提取水印,并使用其私钥对秘密数据进行解密.该方法实现了敏感信息端到端的安全性,计算速度快,能够验证数据源,保证读数的真实性.算例表明,该方法对原始数据的影响小,未经授权的访问无法在合理的时间内完成.在嵌入式硬件上的处理速度优于现有方法.“,”As an essential part of the industrial Internet of Things (IoT) in power systems, the development of advanced metering infrastructure (AMI) facilitates services such as energy monitoring, load forecasting, and demand response. However, there is a growing risk of privacy disclosure with the wide installation of smart meters, for they transmit readings and sensitive data simultaneously. To guarantee the confidentiality of the sensitive information and authenticity of smart meter readings, we proposed a privacy-preserving scheme based on digital watermarking and elliptic-curve cryptography (ECC) asymmetric encryption. The sensitive data are encrypted using the public key and are hidden in the collected readings using digital watermark. Only the authorized user can extract watermark and can decrypt the confidential data using its private key. The proposed method realizes secure end-to-end confidentiality of the sensitive information. It has faster computing speed and can verify the data source and ensure the authenticity of readings. The example results show that the proposed method has little influence on the original data and unauthorized access cannot be completed within a reasonable time. On embedded hardware, the processing speed of the proposed method is better than the existing methods.