Darknet means portions of the Internet that are not found by popular search engines. The users remain anonymous, hence the darknet is often a magnet for criminals.
To gain access to the darknet a so-called “Tor Browser” is needed. Because of the high degree of anonymity, the darknet is known as a transit point for drugs, weapons or child pornography. Alternatively the term "deep web" is used.
A German court has sentenced a man to seven years for selling a gun that was used in the 2016 mass shooting in Munich. It's the first time an illegal arms dealer has been punished for an act in which he was not involved.