Tor hidden services
Even after several successful law enforcement operations, a high number of dark web child pornography sites are still active.
Justin Seitz automated a tool that reveals weaknesses in Tor hidden services.
'Netpoleaks' aims to make it easier for people to share concerns about police activity securely.
After the launch of Facebook's hidden service and an updated Android app making connections smoother, more people are visiting the site over Tor.
A dark web crawler found an 'overwhelming' number of sites were used for criminal purposes such as drugs and illegal pornography.