Deep Web or the Invisible Web and the Dark Web are parts of the World Wide Web (WWW) whose contents are not indexed by standard search engines, like Google, Bing and Yahoo Search, for any reason. The deep web is opposite to the surface web. The Surface Web (also called the Visible Web, Clearnet, Indexed Web) is that portion of the World Wide Web that is readily available to the general public and searchable with standard web search engines. The Deep Web is not to be confused with the Dark Web. The dark web is a very small part of the deep web. The dark web (Darknet) is a subset of the deep web, the part of the Web not indexed by the search engines. Sometimes the term “deep web” is confusingly used to refer specifically to the dark web and Tor.