Online Library

Online extremists’ use of social media poses a new form of threat to the general public. These extremists range from cyberbullies to terrorist organizations. Social media providers often suspend the extremists’ accounts in response to user complaints. However, extremist users can simply create new accounts and continue their activities. In this work we present a new set of operational capabilities to address the threat posed by online extremists in social networks. We use thousands of Twitter accounts related to the Islamic State in Iraq and Syria (ISIS) to develop behavioral models for these users—in particular, what their accounts look like and with whom they connect. We use these models to track existing extremist users by identifying pairs of accounts belonging to the same user. We then present a model for efficiently searching the social network to find suspended users’ new accounts based on a variant of the classic Pólya’s urn setup. We find a simple characterization of the optimal search policy for this model under fairly general conditions. Our urn model and main theoretical results generalize easily to search problems in other fields.

This study sheds light on the emerging threat of terrorists, particularly Hamas and other Palestinian terror organizations, leveraging online crowdfunding and cryptocurrencies. The recent events of October 7, 2023, highlight the pressing nature of this issue. A systematic case analysis reveals the sophisticated exploitation of digital finance for discreet resource accumulation, circumventing traditional oversight. The findings expose unidentified typologies and funding pathways, significantly bolstering terrorist resilience against interdiction efforts. This study provides vital knowledge to catalyze policy adaptations at this critical juncture by probing real-world implications that still lack coordinated responses. Ultimately, this study raises awareness about evolving asymmetries and underscores the importance of closing gaps in vigilance, necessitating academic and policy attention to inform agile, ethical countermeasures before technological vulnerabilities widen further.

The Council of Europe commissioned to the Swiss Institute of Comparative Law a comparative study in respect of filtering, blocking and take-down of illegal content on the Internet in the 47 member States of the Organisation. This study describes and assesses the legal framework but also the relevant case-law and practice in the field. It is divided in two main parts: country reports and comparative considerations.

Is the U.S. making headway in the fight against the Islamic State group? Judy Woodruff talks to retired Col. Derek Harvey, a former Army intelligence officer, and Brendan Koerner of Wired Magazine about the military offensive against ISIS, including the killing of a senior leader, and the resiliency of the group on social media.

What causes an individual to take up violence against civilians for the sake of a political, religious, or social goal? Of course, there are many possible answers to this question. But, one view suggests that narratives may play an especially important role in changing the beliefs, attitudes, and intentions that are precursors to terrorism. There are at least three important implications of this position. First, it is necessary to determine what is meant by terrorism and related terms. Establishing the conceptual boundaries of these terms is a prerequisite to understanding the relationships among them and with narrative communication. Second, it must be established empirically that narrative has the persuasive potency that has been attributed to it. Although narrative has been compared to other forms of evidence, the impact of narrative communication (vs. none) on beliefs, attitudes, intentions, or behavior, has not been determined. Finally, it is important to directly assess the content of narratives that are intended to radicalize. A close examination of the content within terrorist narratives is needed to reveal the targets of belief and attitude change. By determining the persuasive efficacy of narratives and exploring the radicalizing potential of a specific set of extremist narratives, this project advances our knowledge of narrative persuasion processes and helps address the problem of terrorism by approaching it from a communication-based perspective. Chapters 1 and 2 are dedicated to the explication of key terms. Chapter 1 explores the notions of terrorism and extremism, two contested concepts within the literature. Terrorism is defined as the use of violence or threat of violence against civilians to achieve ideological goals. Extremism is defined as a psychological state in which an individual rigidly adheres to an ideology that is characterized by behaviors that marginalize other-minded individuals through a variety of means, up and including the use of physical violence. A model is proposed that suggests that extremism is a risk factor for engaging in terrorism. As Chapter 1 explored the psychological origins of terrorism, Chapter 2 investigates the psychological origins of extremism. This chapter argues that extremism results from a process referred to as radicalization. Radicalization is defined as an incremental social and psychological process prompted by and inextricably bound in communication, whereby an individual develops increased commitment to an extremist ideology resulting in the full or partial assimilation of beliefs and attitudes consistent with that ideology. Thus, it is proposed that those who undergo radicalization are at risk for extremism, and in turn, at risk for engaging in terrorism. After demonstrating radicalization to be a contributing factor for engaging in terrorism in Chapter 2, Chapter 3 illustrates the efficacy of one source with which radicalization can be promoted, narratives. In Chapter 3, meta-analytic techniques are employed to demonstrate that narrative communication positively affects beliefs (N = 4,510; r = .20), attitudes (N = 5,861; r = .21), and behavioral intentions (N = 4,218; r = .19), suggesting that extremist narratives have the potential to contribute to fundamental changes in beliefs, attitudes, and intentions in the direction of those promoted by a terrorist group. Given these results, a close examination of a terrorist group’s narratives would illustrate the beliefs, attitudes, and intentions that might be affected by exposure to those narratives. Thus, Chapter 4 features a theme analysis of the narratives of a terrorist organization, The Animal Liberation Front (ALF). This analysis reveals 10 distinct content themes that are geared towards radicalization. Taken together, the findings of Chapter 3’s meta-analysis and Chapter 4’s theme analysis show how the ALF’s narratives work to promote extremism. Chapter 5 summarizes the findings from the previous chapters and discusses the implications of them. Specifically, this chapter briefly details the ways in which this dissertation may inform future research on narrative communication and strategies to mitigate the impact of extremist narratives on the radicalization process.

To see the author talk about the book, Fighting Terror Online, click on the link ‘The Academic Channel,’ under ‘Related links’ on this webpage.
The unprecedented events that have taken place in recent years have led legislators and governments throughout the world to reconsider and restructure their policies regarding security issues. Today, worldwide attention is being given to a new security threat, in the form of global terrorism. Legal systems are being called upon to provide a response to these threats, in all areas of life, including the online environment.
Among its many tools, global terror also uses advanced technological methods. This fact presents a difficult challenge to policymakers. Therefore, we have chosen to focus this book on the issue of formulating appropriate policy at the interface between security and technology, human rights and economic policy.
The fundamental issue – the tension between security needs and civil rights – is not new. A great deal of experience has been amassed in various countries in this regard, and the question that now arises is whether the existing system of principles and laws, developed on the basis of experience gathered in the “concrete” world, is applicable to the “digital” environment.
This book presents the position that the online environment is a significant and relevant theater of activity in the fight against terror, and will identify the threats, the security needs, and the issues that are unique to this environment. We examine whether the unique characteristics of this environment require new legal solutions, or whether existing solutions are sufficient. Three areas of online activity are identified that require reexamination: security, monitoring, and propaganda. For each of these, we will indicate the issues, examine existing legal arrangements, and offer guidelines for formulating legal policy. There is a demonstrated need to relate to the digital environment as a battlefront, map the new security threats, and thereby hope to provide focus to the pressing discussion on today’s legislative and technological agenda.