卫星测控网安全风险评估方法研究

发布时间：2018-01-13 08:34

本文关键词：卫星测控网安全风险评估方法研究　出处：《国防科学技术大学》2014年硕士论文　论文类型：学位论文

【摘要】：卫星通信由于其通信范围广、可靠性高、便于实现多址通信等优点已经成为现代通信的主要手段,广泛应用于军事作战、气象预测、广播电视、海洋观测以及导航定位等众多领域。卫星测控网作为卫星入轨之后对其进行测控和跟踪的专用网络,其安全性直接关系到通信卫星的可靠性和有效性。定量、全面地对卫星测控网进行安全风险评估,有助于准确掌握其中潜在的安全事件,以便及时采取有效的安全措施,确保测控网稳定、高效运行。为此,本论文在深入研究信息系统安全评估基本理论的基础上,围绕卫星测控网安全风险的评估方法、模型和实现展开了研究,研究成果具有十分重要的价值和意义。算法上,论文具体研究了层次分析(AHP)法和模糊综合评价法的基本原理和过程,并针对算法在指标权重计算时可能存在“虚假专家”的问题,提出了融合聚类分析的改进算法,排除了离异度大的专家意见对权重结果的干扰;通过综合加权,使得最终评价结果更加收敛,充分体现了专家群体的评价意见。模型上,深入研究了卫星测控网总体结构与节点的构成,建立了安全域模型,确定了卫星测控网安全风险评估边界。并结合卫星测控网安全性实际,对影响安全事件风险值的指标因素进行了分解细化,设计了适用于卫星测控网安全评估的指标体系结构,提出了卫星测控网安全风险计算模型,通过实例进一步验证了评估模型的科学性及合理性。实现上,结合论文所述的评估原理,自主研发了一套安全风险评估软件,并得到了实际的应用。整个软件运行高效、易于操作、人机界面友好且支持数据库动态扩展,利用软件可更加准确、智能的评估卫星测控网安全风险。
[Abstract]:Satellite communication has become the main means of modern communication because of its wide range of communication, high reliability, easy to realize multiple access communication and so on. It has been widely used in military operations, weather forecasting, radio and television. Satellite TT & C network is a special network for tracking and monitoring of satellites after orbit. Its security is directly related to the reliability and effectiveness of communication satellites. Comprehensive security risk assessment of satellite TT & C network is helpful to accurately grasp the potential security events in order to timely take effective security measures to ensure the stability and efficient operation of TT & C network. On the basis of deeply studying the basic theory of information system security evaluation, this paper studies the security risk assessment method, model and implementation of satellite TT & C network. The research results have very important value and significance. In the algorithm, the basic principle and process of the analytic hierarchy process (AHP) method and fuzzy comprehensive evaluation method are studied in detail. Aiming at the problem of "false expert" in the calculation of index weight, an improved algorithm of fusion clustering analysis is proposed to eliminate the interference of the expert opinion with large degree of divorce to the weight result. Through the comprehensive weighting, the final evaluation results are more convergent, fully reflecting the evaluation opinions of the expert group. In the model, the overall structure and node structure of the satellite TT & C network are deeply studied, and the security domain model is established. The security risk assessment boundary of satellite TT & C network is determined, and the index factors which affect the risk value of security events are decomposed and refined according to the security reality of satellite TT & C network. The index system structure suitable for security evaluation of satellite TT & C network is designed, and the security risk calculation model of satellite TT & C network is put forward. The scientific and reasonable evaluation model is further verified by an example. Combined with the evaluation principle described in the paper, we developed a set of security risk assessment software, and got practical application. The whole software is efficient, easy to operate, friendly man-machine interface and support the dynamic expansion of database. The software can be used to evaluate the security risk of satellite TT & C network more accurately and intelligently.
【学位授予单位】：国防科学技术大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN927.2

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