Computational techniques to counter terrorism: a systematic survey

Terrorist Network Analysis (TNA) is the field of analyzing and defining the scope of terrorism and researching the countermeasures in order to handle exponentially increasing threats due to ever growing terrorist based activities. This field constitutes several sub-domains such as crawling the data about terrorist attacks/groups, classification, behavioral, and predictive analysis. In this paper we present a systematic review of TNA which includes study of different terrorist groups and attack characteristics, use of online social networks, machine learning techniques and data mining tools in order to counter terrorism. Our survey is divided into three sections of TNA: Data Collection, Analysis Approaches and Future Directions. Each section highlights the major research achievements in order to present active use of research methodology to counter terrorism. Furthermore, the metrics used for TNA analysis have been thoroughly studied and identified. The paper has been written with an intent of providing all the necessary background to the researchers who plan to carry out similar studies in this emerging field of TNA. Our contributions to TNA field are with respect to effective utilization of computational techniques of data mining, machine learning, online social networks, and highlighting the research gaps and challenges in various sub domains.