Taking Down Websites to Prevent Crime Alice Hutchings, Richard Clayton and Ross Anderson Computer Laboratory University of Cambridge Cambridge CB3 0FD Email: fi
[email protected] Abstract—Website takedown has been used to disrupt criminal affected [35], [36]. Moore and Clayton [33] examined the activities for well over a decade. Yet little is known about its effects of website takedown on phishing, and found that it overall effectiveness, particularly as many websites can be re- is helpful, but it cannot completely mitigate phishing attacks placed rapidly and at little cost. We conducted lengthy interviews with a range of people actively engaged in website takedown, as it will never be instantaneous. including commercial companies that offer specialist services, organisations targeted by criminals, UK law enforcement and II. RESEARCH QUESTIONS service providers who respond to takedown requests. We found We interviewed key players who are actively engaged in that law enforcement agencies are far less effective at takedown than commercial firms, who get an awful lot more practice. the website takedown process to explore the issues with it in We conclude that the police must either raise their game, or depth. The questions we tackle in this research are: subcontract the process. 1) How do websites differ according to their criminal purpose? I. INTRODUCTION 2) What organisations are involved in website takedown? Website takedown is a key tool used by financial institutions 3) How are websites taken down? to defend against ‘phishing’ – the use of fraudulent websites 4) What are the challenges with website takedown? to steal customer credentials [33].