A novel approach to intrusion detection base on fast incremental SVM

A new incremental SVM algorithm to intrusion detection based on cloud model is proposed for the low efficiency of border vectors extraction. In this algorithm, the characteristic distance between the heterogeneous samples is mapped into a membership function to extract the boundary vectors from initial dataset, which reflects the stability and uncertainty characteristics of the cloud model. Also the possible changes of support vector set after new samples adding are analyzed and the useless samples are discarded by the analysis results. The theoretical analysis and simulation results show that the detection speed is greatly improved, while maintaining a high detection performance.