Hi all, I am trying to make a list of events when different censorship regimes blocked Tor. The goal is to understand the censorship arms race, especially capabilities of current censors and how long it took Tor to resolve those issues.
The attached pdf has all the events I could find. I collected these events from the Tor blog, the bug tracker and the censorship wiki.
For some of the events I couldn't find any dates and also I'm not sure if this is a complete list of all the censorship events.
Can any of you help me find dates of some of the events or direct me to other sources of information to find more events?
Thanks! -- Sadia
Tor's site was blocked in Turkey in March 2014: http://cartography.io/
For the event described as "Iran – 2013 – TCP reset on all non-HTTP": this was actually a traffic shaping behavior that matched TCP connections against a whitelist (HTTP or HTTPS), if the connection did not match this behavior, then the throughput was throttled down to 1 packet per second after sixty seconds. Psiphon's bypass mechanism was to prepend "GET / HTTP1.0" in front of traffic streams.
On Mon, Feb 2, 2015 at 2:58 PM, Sadia Afroz sadia.afroz@berkeley.edu wrote:
Hi all, I am trying to make a list of events when different censorship regimes blocked Tor. The goal is to understand the censorship arms race, especially capabilities of current censors and how long it took Tor to resolve those issues.
The attached pdf has all the events I could find. I collected these events from the Tor blog, the bug tracker and the censorship wiki.
For some of the events I couldn't find any dates and also I'm not sure if this is a complete list of all the censorship events.
Can any of you help me find dates of some of the events or direct me to other sources of information to find more events?
Thanks!
Sadia
ooni-dev mailing list ooni-dev@lists.torproject.org https://lists.torproject.org/cgi-bin/mailman/listinfo/ooni-dev
This is great! Thanks!
On Mon, Feb 2, 2015 at 1:20 PM, Collin Anderson collin@averysmallbird.com wrote:
Tor's site was blocked in Turkey in March 2014: http://cartography.io/
For the event described as "Iran – 2013 – TCP reset on all non-HTTP": this was actually a traffic shaping behavior that matched TCP connections against a whitelist (HTTP or HTTPS), if the connection did not match this behavior, then the throughput was throttled down to 1 packet per second after sixty seconds. Psiphon's bypass mechanism was to prepend "GET / HTTP1.0" in front of traffic streams.
On Mon, Feb 2, 2015 at 2:58 PM, Sadia Afroz sadia.afroz@berkeley.edu wrote:
Hi all, I am trying to make a list of events when different censorship regimes blocked Tor. The goal is to understand the censorship arms race, especially capabilities of current censors and how long it took Tor to resolve those issues.
The attached pdf has all the events I could find. I collected these events from the Tor blog, the bug tracker and the censorship wiki.
For some of the events I couldn't find any dates and also I'm not sure if this is a complete list of all the censorship events.
Can any of you help me find dates of some of the events or direct me to other sources of information to find more events?
Thanks!
Sadia
ooni-dev mailing list ooni-dev@lists.torproject.org https://lists.torproject.org/cgi-bin/mailman/listinfo/ooni-dev
-- *Collin David Anderson* averysmallbird.com | @cda | Washington, D.C.
On Mon, Feb 2, 2015 at 2:58 PM, Sadia Afrozwrote:
Hi all, I am trying to make a list of events when different censorship regimes blocked Tor.
...
Can any of you help me find dates of some of the events or direct me to other sources of information to find more events?
This tool could be of use to explore censorship by ISPs in the UK:
Disclosure: I coordinated the development of the tool.
Results for the Tor project website:
https://www.blocked.org.uk/results?url=http://torproject.org https://www.blocked.org.uk/results?url=https://torproject.org
Note the difference between HTTP and HTTPS results. It could be an artefact of the tool's imperfect measurements (e.g. failing to follow redirects correctly) or it could be that UK censor-ware can be circumvented trivially. (TLS FTW!)
Hope this helps
Richard.
This is really neat. Thank you!
On Wed, Feb 4, 2015 at 7:27 AM, Richard King richard@richardskingdom.net wrote:
On Mon, Feb 2, 2015 at 2:58 PM, Sadia Afrozwrote:
Hi all, I am trying to make a list of events when different censorship regimes blocked Tor.
...
Can any of you help me find dates of some of the events or direct me to other sources of information to find more events?
This tool could be of use to explore censorship by ISPs in the UK:
Disclosure: I coordinated the development of the tool.
Results for the Tor project website:
https://www.blocked.org.uk/results?url=http://torproject.org https://www.blocked.org.uk/results?url=https://torproject.org
Note the difference between HTTP and HTTPS results. It could be an artefact of the tool's imperfect measurements (e.g. failing to follow redirects correctly) or it could be that UK censor-ware can be circumvented trivially. (TLS FTW!)
Hope this helps
Richard.
https://richardskingdom.net/ Twitter: @graphiclunarkid
ooni-dev mailing list ooni-dev@lists.torproject.org https://lists.torproject.org/cgi-bin/mailman/listinfo/ooni-dev
-
Collin Anderson -
Richard King -
Sadia Afroz