dark web

noun

variants or less commonly Dark Web

: the set of web pages on the World Wide Web that cannot be indexed by search engines, are not viewable in a standard Web browser, require specific means (such as specialized software or network configuration) in order to access, and use encryption to provide anonymity and privacy for users

The dark web is only accessible by means of special software, allowing users and website operators to remain anonymous. Once used by political dissidents, the dark web has become the Internet's black market, where visitors can buy anything from guns to drugs and fake IDs or trade child pornography.