Deep Web vs Dark Web: What's the Difference? | UpGuard

This report explains the distinctions between the surface web, deep web, and dark web, detailing how search engine crawling defines the surface web, how obscurity (e.g., robots.txt) and authentication underpin the deep web, and how encrypted overlay networks like Tor enable the dark web. It outlines Tor’s origins, its legitimate and illicit use cases, and the challenges law enforcement faces in investigating dark web activity, concluding that despite the dark web’s notoriety, the more significant organizational risk often stems from sensitive data exposure within the authenticated deep web.