[IP] Empirical Analysis of Internet Filtering in China

[Dave Farber <dave@farber.net>]

------ Forwarded Message
From: Ben Edelman <edelman@law.harvard.edu>
Date: Tue, 03 Dec 2002 23:29:48 -0500
To: dave@farber.net
Cc: Jonathan Zittrain <zittrain@law.harvard.edu>
Subject: New release: Empirical Analysis of Internet Filtering in China

Dave,

Professor Zittrain and I continue to study Internet filtering in countries
worldwide, including restrictions on Web access in China.  As in our prior
testing of Saudi Arabia <[1]>, there exists no publicly available master list
of blocked sites.  To assemble something approaching such a list, we have
found ways to remotely test "twenty questions" style, asking about thousands
of individual URLs, whether based upon a domain name or an IP address.

We today released a report detailing the results of testing over the past
eight months.  We tested more than two hundred thousand web sites, and we
found nearly twenty thousand to be inaccessible from China.  Highlights
include sites operated by world governments, non-governmental organizations,
and educational institutions -- as well as sites with health, entertainment,
and political content.

Our report is available at
    <http://cyber.law.harvard.edu/filtering/china>

We continue to operate a system for real-time testing of filtering in China:
    <http://cyber.law.harvard.edu/filtering/china/test>


Ben Edelman
Berkman Center for Internet & Society
Harvard Law School
<http://cyber.law.harvard.edu/>




<[1]>
Documentation of Internet Filtering in Saudi Arabia
<http://cyber.law.harvard.edu/filtering/saudiarabia>


------ End of Forwarded Message

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