How governments have tried to block Tor

Slides

First slide of slides-28c3.pdf

Events

28th Chaos Communication Congress

Description

Iran blocked Tor handshakes using Deep Packet Inspection (DPI) in January 2011 and September 2011. Bluecoat tested out a Tor handshake filter in Syria in June 2011. China has been harvesting and blocking IP addresses for both public Tor relays and private Tor bridges for years.