Explains the nature of cybercrime and the three primary levels of the internet: the Surface Web, Deep Web, and Dark Web. A significant portion of the material details the major criminal activities found on the Dark Web, including drug trafficking, child pornography, human trafficking, and cyberterrorism. Finally, the excerpts examine the various tools and techniques used by law enforcement, the private sector, and the community to fight these crimes, proposing a centralized system (IDH) for enhanced information sharing and collaboration.