Explore the intricacies of dark peer-to-peer networks in this Black Hat USA 2005 conference talk. Delve into the concepts of scalable searches, the small world phenomenon, and navigable small world networks. Learn about Kleinberg's result and its application to dark P2P networks. Discover the methods and algorithms used for routing in these networks, supported by simulation results. Address practical concerns such as preventing malicious behavior, ensuring ease of use, and data storage. Gain insights from speakers Ian Clarke and Oskar Sandberg as they discuss the challenges and solutions for routing in dark P2P networks, providing a comprehensive overview of this complex topic in network security.