Considering that growing hierarchical self-organizing map(GHSOM) ignores the influence of individual component in sample vector analysis, and its accurate rate in detecting unknown network attacks is relatively lower,...Considering that growing hierarchical self-organizing map(GHSOM) ignores the influence of individual component in sample vector analysis, and its accurate rate in detecting unknown network attacks is relatively lower, an improved GHSOM method combined with mutual information is proposed. After theoretical analysis, experiments are conducted to illustrate the effectiveness of the proposed method by accurately clustering the input data. Based on different clusters, the complex relationship within the data can be revealed effectively.展开更多
分布式拒绝服务(distributed denial of service,DDoS)攻击自出现以来一直是全球互联网网络安全的重要威胁之一。目前很多DDoS攻击检测方法虽然对已知类型攻击具有较高的检测率,但是不能有效识别新的攻击类型,无法应对DDoS攻击形式变化...分布式拒绝服务(distributed denial of service,DDoS)攻击自出现以来一直是全球互联网网络安全的重要威胁之一。目前很多DDoS攻击检测方法虽然对已知类型攻击具有较高的检测率,但是不能有效识别新的攻击类型,无法应对DDoS攻击形式变化多和快的特点。为了准确检测出DDoS攻击,同时使检测模型具有良好的自适应性、扩展性和较低的更新代价,以应对层出不穷的DDoS攻击,提出了一种综合考虑网络流量双向特征、固定特征和统计特征,采用增量式GHSOM(Growing Hierarchical Self-Organizing Maps)神经网络算法的DDoS攻击检测方法。首先,根据DDoS攻击流量的特点提取流量特征,组成流量八元组联合特征,然后利用增量式GHSOM神经网络算法进行异常流量分析,最后,通过实验验证检测方法的有效性。实验结果表明,提出的DDoS攻击检测方法不仅能够有效检测出已知类型的DDoS攻击,而且能够实现对检测模型的在线动态更新,对于新出现的DDoS攻击类型,具有相同的检测率。展开更多
基金Supported by the Natural Science Foundation of Tianjin(No.15JCQNJC00200)
文摘Considering that growing hierarchical self-organizing map(GHSOM) ignores the influence of individual component in sample vector analysis, and its accurate rate in detecting unknown network attacks is relatively lower, an improved GHSOM method combined with mutual information is proposed. After theoretical analysis, experiments are conducted to illustrate the effectiveness of the proposed method by accurately clustering the input data. Based on different clusters, the complex relationship within the data can be revealed effectively.