A compelling, first-hand account of the dark web, from its underground ecosystem, to the people responsible for committing data breaches and leaking data, 21st century’s most consequential data breaches, the responses to those attacks, and the impact of dark web data and intelligence gathering and can have in the defense and security of our nation. In Grey Area, veteran hacker and cybersecurity investigations expert Vinny Troia offers an unfiltered, first-person look into the evolving relationship between open-source intelligence (OSINT) and the dark web data ecosystem. Drawing from years of hands-on experience in digital forensics, dark web investigations, and adversarial engagement, Troia explores how publicly available and commercially available information—PAI and CAI—are rapidly becoming the backbone of modern intelligence operations, and how a human intelligence network of known cyber criminals helped identify and stop one of the largest data breaches in known history. This book