Rebecca's study is here: http://firstmonday.org/article/view/2378/2089
She found significant variation in ISP practices at the time. Cheers Ivan Ivan Sigal Executive Director, Global Voices [email protected] l +1 202 361 2712 www.globalvoicesonline.org On Aug 15, 2012, at 9:35 AM, Paul Hyland wrote: > Rebecca MacKinnon would be one to ask about Internet censorship in China - > she studied it at the University of Hong Kong a few years ago, and is on the > board of Global Voices Online. She's now a fellow at the New America > Foundation. > > Bio/contact info: http://newamerica.net/user/303 > > On Aug 15, 2012, at 2:46 AM, "Eric S Johnson" <[email protected]> wrote: > >> As far as I can tell, China doesn't "keyword-filter" in the sense most >> people think of that phrase. That is, the Great Firewall isn't inspecting >> all the text which flows through it, failing to deliver any web pages which >> have offending words. The filtering is of two main types: >> 1) any of thousands of domains or specific URLs are on a static >> blacklist, and >> 2) there is a small list of words which, if present in a URL, will >> dynamically result in blocking. >> The blocking is generally manifested as a “connection reset” page which >> looks to most users like “page not found.” China also poisons the DNS for >> some of the domains it blocks, but this is (as far as I can tell) redundant >> because of “1” above. (I guess it trips up some users whose VPN fails to >> tunnel DNS requests.) >> Sometimes (inconsistently), an attempt to see blocked content >> results not only in the content not being delivered, but also a “punishment” >> meted out to the offending user: all attempts to access servers outside >> China fail for a period of between 5 and 10 minutes. >> It’s “2” above which can be used to censor searches, since >> unencrypted access to Google from inside China (or to Baidu from outside >> China) puts the search terms into the URL. This censorship can easily be >> neutralised by accessing Google via HTTPS. >> There are persistent reports that China’s cybercensorship can >> sometimes vary (a little) by ISP, but I’ve never seen this (I’ve only been >> to ~13 of the 34 PRC-defined provinces), and Alkasir hasn’t ever detected >> any such variations. (The internet in 3 of those provinces isn’t filtered: >> Hong Kong, Macao, and Taiwan. Of course, even if the PRC thinks Taiwan’s a >> province, Taiwan doesn’t think that.) >> >> Best, >> Eric >> >> > -----Original Message----- >> > From: [email protected] [mailto:liberationtech- >> > [email protected]] On Behalf Of Philipp Winter >> > Sent: Monday, 13 August 2012 16:15 >> > To: Stanford tech list >> > Subject: Re: [liberationtech] Images of Blocking in Different Countries? >> > >> > On Sun, Aug 12, 2012 at 09:14:48PM -0700, Adam Fisk wrote: >> > > My understanding is that China just shows a blank page. Is that correct? >> > >> > That depends on the type of filtering. The keyword filtering infrastructure >> > forcefully terminates connections and depending on the browser you will >> > get an >> > error message saying something like "The connection was reset". >> > >> > You can actually test it yourself by going to baidu.com and searching for >> > "falun". >> > >> > Philipp >> > _______________________________________________ >> > liberationtech mailing list >> > [email protected] >> > >> > Should you need to change your subscription options, please go to: >> > >> > https://mailman.stanford.edu/mailman/listinfo/liberationtech >> > >> > If you would like to receive a daily digest, click "yes" (once you click >> > above) next >> > to "would you like to receive list mail batched in a daily digest?" >> > >> > You will need the user name and password you receive from the list >> > moderator >> > in monthly reminders. You may ask for a reminder here: >> > https://mailman.stanford.edu/mailman/listinfo/liberationtech >> > >> > Should you need immediate assistance, please contact the list moderator. >> > >> > Please don't forget to follow us on http://twitter.com/#!/Liberationtech >> _______________________________________________ >> liberationtech mailing list >> [email protected] >> >> Should you need to change your subscription options, please go to: >> >> https://mailman.stanford.edu/mailman/listinfo/liberationtech >> >> If you would like to receive a daily digest, click "yes" (once you click >> above) next to "would you like to receive list mail batched in a daily >> digest?" >> >> You will need the user name and password you receive from the list moderator >> in monthly reminders. You may ask for a reminder here: >> https://mailman.stanford.edu/mailman/listinfo/liberationtech >> >> Should you need immediate assistance, please contact the list moderator. >> >> Please don't forget to follow us on http://twitter.com/#!/Liberationtech > _______________________________________________ > liberationtech mailing list > [email protected] > > Should you need to change your subscription options, please go to: > > https://mailman.stanford.edu/mailman/listinfo/liberationtech > > If you would like to receive a daily digest, click "yes" (once you click > above) next to "would you like to receive list mail batched in a daily > digest?" > > You will need the user name and password you receive from the list moderator > in monthly reminders. 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