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.