基于NB-IOT的孤岛式微电网密钥协商协议研究

Research on key agreement protocol for isolated microgrid based on NB-IOT

针对当前日益突出的电力系统网络安全问题,尤其是较容易接近的孤岛式微电网,在基于公钥密码系统的双方密钥协商协议基础上,设计了孤岛式微电网密钥协商协议。在该微电网中,考虑到监测终端的覆盖范围广、深的要求,采用NB-IOT技术进行通信。然后对该密钥协商协议进行了安全性分析、关键代码的实现与仿真。在大量的实验数据分析下得出密钥协商三个阶段分别只需要40 ms、23 ms和4 ms的计算时间,证明了该协议可以高效快速地实现双方的身份认证与密钥的协商,防止数据篡改、重放、伪造等攻击。

Aiming at the prominent network security problems of electric power system,especially the islanded microgrid,based on key agreement protocol between two parties of public key cryptosystem,a key agreement protocol is designed for islanded microgrid.Considering the requirement of wide and deep monitoring terminals coverage,the NB-IOT is used to communicate.Then the security of the key agreement protocol is analyzed.Besides,the key code is implemented and simulated.Lastly,a large number of experimental data analysis show that the three stages of key agreement only need 40 milliseconds,23 milliseconds and 4 milliseconds,respectively.Therefore,the protocol can efficiently and quickly realize the identity authentication and key negotiation between two parties to prevent data tampering,replay,forgery attack and so on.