【作者】 高鹏；

【导师】 张少敏；

【作者基本信息】 华北电力大学 ， 计算机应用技术， 2012， 硕士

【摘要】 由于计算机技术的发展和相关知识的普及,使得具有网络攻击技术的人越来越多。这就造成了各单位各部门网络信息的潜在安全威胁增大。同时,人们对信息安全的关注度也越来越高,用户对信息的需求也推动着公共事业单位,政府职能部门和商业组织等对信息安全的投入逐渐加大。而对于电力企业来说,由于缺少或使用了不安全的数据,可能造成无法挽回的损失,所以对信息的完整性要求更加严格。随着智能电网标准化进程的不断推进和开放性的增加,智能电网的信息安全,尤其是完整性安全问题越来越突出。目前的信息完整性评估方法多直接对数据进行操作,对于数据量巨大的智能电网的评估中效率缓慢同时无法给出整个系统的完整性进行统一的评估结果。首先,本文根据目前国际公认的完整性定义,对针对智能电网的网络环境、安全机制和完整性需求,对完整性各项指标的分析和量化,对智能电网的网络信息的状态进行自动机建模,给出了一种无需对信息进行直接操作的信息完整性定量评估模型QEMI (Quantitative Evaluation Model for Integrity)。同时,本文用实例证明了此模型可实现整体系统的定量评估,并具有一定的可展性。接着,本文设计了基于QEMI的智能电网网络信息完整性评估系统,实现了智能电网的网络信息完整性定量评估,并用算例证明了此评估模型可提供精确的评估结果,并且通过设计了针对经济性目的的扩展功能,证明其可提供有借鉴意义的评估结果。最后,本文以完整性状态序列作为马尔科夫模型的输入,设计并实现了智能电网网络信息完整性状况的预测。更多还原

【Abstract】 As the development of computer technology and the popularization of knowledge, more and more people have network attack techniques.It has resulted in potential security threats expanding in various units and departments of the network information. Meanwhile, people’s attention to information security are increasingly high, the users’demand for information promote the public institutions, and the government departments and commercial organizations gradual increase investment in information security at the same time. For power companies, use of unsafe or incomplete data may due to irreparable loss, so the integrity of the information requirements should be more stringent.With the advancing standardization process of Smart Grid and increasing openness, network security, especially integrity security of Smart Grid has been more and more critical. At present, most of the methods of data evaluation operate directly on data. In the Smart Grid which has a huge amount of data its efficiency is slow, and it’s not quantitative evaluation which is more objective on the whole system. At first,based on the definition of the integrity internationally accepted, by way of the analysis and quantization for the integrity indicators of Smart Grid, this paper built the automaton model for the netwok information statuses of Smart Grid, gave a quantitative evaluation model for data integrity QEMI(Quantitative Evaluation Model for Integrity) which doesn’t need to directly operation on the data.At the same time,this paper built different data integrity quantitative evaluation modals for the different security mechanisms, and proved this evaluation model is expandable and can provide quantitative evaluation results. And then, this paper designed and realized the Smart Grid Network Information Integrity Quantitative Evaluation System based on QEMI, and gave examples to proved that its results is accurate. And by expanding the system function forfinancial goals, proved that the system can give significant results. Finally, using the integrity of the state sequence as a Markov model input, this paper designed and realized predictive analysis for the integrity status of the Smart Grid network information.更多还原