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
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