Insider threat detection of adaptive optimization DBN for behavior logs

Abstract

For the problems of insider threats such as great harm due to damage and resultant loss, difficulty inextracting abnormal behavior features of insiders because of transparency and concealment, and low detection rate, aninsider threat detection model using adaptive optimization DBN for behavior logs is put forward. The model carries outdeep learning based on the integrated and normalized behavior logs to fully learn normal and abnormal behavior featuresof insiders to form optimal representations of the behavior features of insiders. The experimental results show that themultiple-hidden-layer deep learning model can fully learn the behavior features of insiders, improving the detection rateof insider threat. Particularly, the adaptive optimization method of the golden section is better than that using thedichotomy method, which can increase the threat detection rate of the DBN model to 97.872%, with more significantadvantages.