The document summarizes the key differences between the deep web and dark web. The deep web refers to internet content that is not indexed by standard search engines but is still accessible through specific software or authorization. In contrast, the dark web exists on encrypted networks and requires specialized software to access. It makes up a small part of the deep web and is used for illegal activities like drugs, guns, abuse and contract killings. Common marketplaces on the dark web include Silk Road and Armory.