计算机科学 ›› 2019, Vol. 46 ›› Issue (6): 80-89.doi: 10.11896/j.issn.1002-137X.2019.06.011
所属专题: 网络通信
张洪泽1, 洪征1, 王辰2, 冯文博1, 吴礼发1
ZHANG Hong-ze1, HONG Zheng1, WANG Chen2, FENG Wen-bo1, WU Li-fa1
摘要: 现有的基于网络流量的协议格式推断方法只提取报文关键字的平坦序列,并没有考虑报文关键字之间的顺序、并列与层次关系的结构特性;此外,报文样本中的噪音往往导致关键字识别的准确率偏低。文中提出了一种自动识别未知协议报文关键字并推断报文结构的方法。所提出的方法在收集未知协议实体程序通信报文的基础上,采用二阶段闭合模式挖掘策略对通信报文实施闭合序列模式挖掘,识别协议关键字并生成包含具有关键字组合关系的关键字序列;在此基础上提取关键字之间的顺序、并列以及层次关系,进而推断报文结构。协议关键字识别过程中采用设置最小支持度阈值的方法,可直接分析实际网络中包含噪音的报文样本,保证了关键字识别的准确率。实验结果表明,所提出的协议格式推断方法被应用于文本协议和二进制协议时,对报文关键字识别与报文结构推断均能取得理想的推断效果。
中图分类号:
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