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This paper presents a review of recent academic scholarship and debates on cyber terrorism, and more broadly of what is known about terrorist’s direct use of the Internet as weapon and, less directly, as a communication device. It presents an overview of a field of discourse that has, since its inception, provided a number of foreboding and even doomsday warnings about the future of cyber terrorism, which in the main have failed to come to realization. First, it surveys why these gloomy warnings regarding future proliferation of cyber terrorism have not been born out in practice, and explains that rather than looking for instances of the Internet being used directly as a weapon by terrorists, current debates in academic and policy circles have shifted to trying to measure and ascertain the role that the Internet plays in spreading and supporting extremist discourse to ever wider audiences. It continues by posing a series of questions regarding online audiences that are in need of future research if we are to better understand the role of the Internet in spreading and supporting violent extremist discourse and cultivating terrorism, most importantly the role of audiences as autonomous agents in navigating, reacting and responding to online violent extremist materials.

ISIS and other international terrorist organizations rely on the Internet to disseminate their extremist rhetoric and to recruit people to their cause, particularly through popular online social media applications. Any meaningful counterterrorism strategy must, therefore, account for the ways in which terrorist organizations use the Internet to prey on young, manipulable minds who are drawn to radical ideas and propaganda and to the desire to serve a cause larger than themselves. This article outlines the ways in which extremist organizations use the Internet to ensnare new recruits, analyzes the implications of cyber-recruitment on existing counterterrorism techniques, and suggests ways in which the U.S. government can work with Internet service providers and other major cyber corporations to better address this growing threat.

This report contains findings from the Advanced Research Workshop supported by the NATO Science for Peace and Security Programme on terrorists’ use of the Internet, held at Dublin City University on 27th-29th June 2016. The event was co-organised by the Cyberterrorism Project and the VOX-POL Network of Excellence. The workshop consisted of a total of 31 presentations, followed by a roundtable discussion during which participants formulated a set of recommendations. 60 delegates attended the symposium, from 13 different countries, including researchers and representatives from NATO HQ, NATO CCD-COE, UNICRI, the European Defence Agency, the Bavarian Police Academy and the Italian Carabinieri. This report provides summaries of each of the presentations and presents the workshop’s final recommendations.

Reacting to a series of terrorist attacks, the European Union has tasked Europol to establish an Internet Referral Unit (EU IRU) to counter terrorist propaganda. The political statement entailed a clear commitment to fundamental rights including data protection. This paper analyses the present and future applicable legal bases and elaborates on challenges connected to the practical implementation of the EU IRU. It also explains why Europol is often referred to as “the most controlled police
agency in the world”. The paper concludes that it is possible to tackle terrorism propaganda online in a
data protection compliant manner

What characterises social media radicals? And why some people become attracted to radicalisation? To explore answers to these questions, a number of tweets posted by a group of suspected radicals tweeting in Arabic were analysed using social network analysis and machine learning. The study revealed that these suspected radicals’ networks showed significant interaction with others; but this interactivity is only significant quantitatively as the interaction is not reciprocated. With regards to why these suspected radicals became attracted to radicalisation, Topic Modelling revealed these suspected radicals’ tweets underpinned a perceived injustice that they believed the Secret Police and the Government inflicted upon them. Overall, the study has shown that data science tools have the potential to inform our understanding of online radicalisation. It is hoped this exploratory study will be the basis for a future study in which the research questions will be answered using a larger sample.