Des chercheurs suédois révèlent le système gouvernemental chinois pour bloquer Tor
►http://www.v3.co.uk/v3-uk/news/2165733/swedish-researchers-uncover-key-chinas-tor-blocking
Swedish researchers have discovered that Chinese officials have updated the country’s ’Great Firewall’ to make it harder for citizens to use the Tor network that provides a means of surfing the web anonymously.
It has been long-known that the ’Great Firewall Wall of China’ has attempted to block citizens from using the Tor network, by blocking access to some IP addresses or using HTTP header filters to weed out suspect traffic.
But Philipp Winter and Stefan Lindskog of Karlstad University in Sweden have discovered that Chinese authorities have recently increased the sophistication of their filtering tools, making it more difficult for citizens to browse the web freely, by blocking so-called Tor bridges.
Pour d4n3ws, la solution réside dans le service obfsproxy :
►http://d4n3ws.polux-hosting.com/2012/04/04/bloquage-de-tor-renforce-sur-le-grand-firewall-de-chine
La solution consiste alors à faire transiter son trafic Tor via le service obfsproxy mais les machines proposant ce service sont encore peu nombreuses et pour la plupart publiques… donc bloquées
►https://www.torproject.org/projects/obfsproxy.html.en
obfsproxy is a tool that attempts to circumvent censorship, by transforming the Tor traffic between the client and the bridge. This way, censors, who usually monitor traffic between the client and the bridge, will see innocent-looking transformed traffic instead of the actual Tor traffic.