面向分布式灵活资源的物理层无线通信安全方案  

Physical-layer Wireless Communication Security Scheme for Distributed Flexible Energy Resources

作　　者：马媛媛 李尼格 陈牧 刘京 Ma Yuanyuan;Li Nige;Chen Mu;Liu Jing(State Grid Smart Grid Research Institute Co.,Ltd.,Nanjing 210003;State Grid Laboratory of Power Cyber-security Protection and Monitoring Technology,Nanjing 210003;State Grid Shandong Electric Power Institute,Jinan 250003;School of Information,Xiamen University,Xiamen,Fujian 361005)

机构地区：[1]国网智能电网研究院有限公司,南京210003 [2]电力网络安全防护与监测技术实验室,南京210003 [3]国网山东省电力公司电力科学研究院,济南250003 [4]厦门大学信息学院,福建厦门361005

出　　处：《信息安全研究》2024年第8期745-752,共8页Journal of Information Security Research

基　　金：国家电网有限公司科技项目(5400-202258435A-2-0-ZN)。

摘　　要：随着可再生能源的崛起和分布式发电的普及,可以实现电力和信息双向传输的分布式灵活资源变得越来越重要.其中信息网络通过运营无线专网实现无线互联.由于物理层的脆弱性以及密钥分发和管理的复杂性,需要考虑物理层安全技术.而传统的物理层加密技术的混沌系统初始条件安全性无法保证.针对上述问题,为分布式灵活资源信息网络的无线通信系统提供了一种物理层安全方案.该方案不仅减轻了密钥分发和管理的复杂性,而且增强了混沌系统的初始条件和通信系统的安全性.主要贡献包括提出一种物理层密钥生成方法,即利用低通滤波和滑动窗口增强信道互易性,累积分布函数进行量化,以及用哈希函数实现密钥协商和隐私放大.还提出一种基于混沌的物理层加密方案,利用之前生成的密钥,通过Arnold变换和陈氏混沌理论对信号的相位和幅度进行加密.仿真结果显示,物理层密钥生成方案对信道特征的处理增强了信道的互易性,后续得到的密钥通过了NIST随机性测试.同时,采用混沌理论的加密方案使得窃听者得到的比特不一致率维持在0.5,保证了信息的安全传输.With the rise of renewable energy and the proliferation of distributed power generation,distributed flexible resources capable of bidirectional transmission of electricity and information are becoming increasingly important.In this context,information networks are interconnected wirelessly through the operation of dedicated wireless networks.Due to the vulnerability of the physical layer and the complexity of key distribution and management,it is necessary to consider physical layer security technologies.Traditional physical layer encryption technologies cannot guarantee the security of initial conditions in chaotic systems.To address these issues,we provide a physical layer security scheme for the wireless communication system of distributed flexible resource information networks.This scheme not only reduces the complexity of key distribution and management but also enhances the security of the initial conditions of chaotic systems and the communication system.Our main contributions include a physical layer key generation method that uses low-pass filtering and sliding windows to enhance channel reciprocity,a cumulative distribution function to quantify,and a hash function to achieve key agreement and privacy amplification.We also propose a physical layer encryption scheme based on chaos theory,which uses the previously generated keys to encrypt the phase and amplitude of signals through Arnold transformation and Chen’s chaotic theory.Moreover,we conducted simulations,and the results show that our physical layer key generation scheme enhances the reciprocity of the channel by handling channel characteristics,and the subsequent keys passed the NIST randomness test.Meanwhile,the encryption scheme based on chaotic theory maintains the bit inconsistency rate at 0.5 for eavesdroppers,ensuring the secure transmission of information.

关 键 词：物理层安全 新型电力系统 分布式灵活资源 陈氏混沌系统 调制加密 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]