The consequences of cybercrime originating from the Dark Web impact nearly every industry and cost the global economy as much as $600 billion — about 0.8 percent of global GDP. Security industry experts project that companies around the world could incur costs and lost revenue amounting to more than $5 trillion over the next five years due to cyberattacks. The dark web — those trackless parts of the internet that traditional search engines do not index and where individuals mask their identities through powerful anonymization tools — is home to innumerable hidden marketplaces, communities, groups and forums used to traffic in illegal goods and services — from child pornography, drugs and weapons to tools for malware and ransomware distribution, even stolen data that can affect national security. The presentation will cover the results of the six-year effort to create the first comprehensive index of the Dark Web, and application of Data Science and AI to make collected intelligence actionable for law enforcement needs.