Generating Statistic Application Signatures for Inference of Unknown Applications

In this paper, we propose a novel approach of protocol reverse engineering to extract protocol keywords of unknown application from raw network traffic data without a prior knowledge about the application based on compression theory, entropy and variance analysis. We also present an efficient method to generate statistic signature of unknown application leveraging machine learning and probabilistic models. The experiment results show that our approach extract protocol keywords of application in high accuracy, the false positive and false negative of application identification using our method are very low. Our technique can also discover new application in unknown traffic.