基于AES算法的配电网多业务分级的安全策略研究

Research on Security Strategy of Multi Service Classification in Distribution Network Based on AES Algorithm

目前配电网仍存在如配电终端被控制、通信协议被监听、控制指令被篡改等潜在安全问题,因此研究配电网的业务信息安全是必要的。针对配电自动化系统中配电远程终端的数据传输信息安全问题,提出了一种基于AES算法的数据传输的安全加密策略。文章分析了配电网多种典型业务的安全通信需求,将典型业务划分为3个安全等级,结合信息传输安全模型,在不同迭代轮次的AES算法基础上设计了一种安全加密策略,最后通过仿真分析,研究AES算法迭代轮次分别与明文长度、加密时间、解密时间的关系,通过适当减少AES算法内部的迭代轮次,提高了算法效率,验证了策略的有效性。

At present, there are still potential security problems in distribution network such as distribution terminals are controlled, communication protocol is monitored, control instruction is tampered and so on, so it is necessary to study the business information security of the distribution network. Aiming at the data transmission information security problem of distribution terminal in distribution automation system, a security encryption strategy based on AES algorithm for data transmission is proposed. In this paper, the security communication requirements of several typical services in distribution network are analyzed. The typical services are divided into three security levels. Combined with the information transmission security model, a security encryption strategy is designed on the basis of the AES algorithm of different iterations. Finally, through the simulation analysis, the relationship between the iterations of the AES algorithm and the length of the plaintext, the encryption time and the decryption time is studied. By reducing the iterations in the AES algorithm, the efficiency of the algorithm is improved and the effectiveness of the strategy is verified.