在深入研究方差时间图(Variance—timeplots,VTP)的基础上,针对VTP算法中的3个关键参数:数据块数、采样数据长度和数据更新度参数进行了详细测试研究,分别对三者给出比较恰当合理的具体值,并提出基于上述参数值的分布式拒绝服务(DDoS)攻击判决门限条件。
On the base of in-depth study of variance-time plots, for the 3 key parameters: data blocks, length of sampled data and data freshness, we have carried out a detailed test, and respectively given them a much more appropriate specific value. At last, we proposed a decision threshold conditions for DDoS attacks on the base of above parameters.