Free Expression Online
Studies of Internet filtering, network interference, and other technologies and practices that impact freedom of expression online.
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Latest Research
China’s Great Cannon
This post describes our analysis of China’s “Great Cannon,” our term for an attack tool that we identify as separate from, but co-located with, the Great Firewall of China. The first known usage of the Great Cannon is in the recent large-scale novel DDoS attack on both GitHub and servers used by GreatFire.org.
Repository of censored and sensitive Chinese keywords: 13 lists, 9,054 terms
Contained are links to a set of 9,054 sensitive Chinese keywords, which combine 13 existing lists. These keywords may be helpful to researchers who are searching for censored content in Chinese or testing for network interference.
Tracing the Path of a Censored Weibo Post and Compiling Keywords that Trigger Automatic Review
We investigate what keywords might trigger censorship via automatic review in Sina Weibo and followed the pathways a typical censored post might take on Chinese social media.
Asia Chats: LINE keyword filtering upgraded to include regular expressions
This report is part of a series which analyzes regionally-based keyword censorship in LINE, a mobile messaging application developed by LINE Corporation. The most recent update to the censorship keyword list include a number of new entries as well as the introduction of regular expressions for more advanced keyword matching.
Iraq Information Controls Update: Analyzing Internet Filtering and Mobile Apps
In this report, we update the results of our June 2014 network measurement tests in Iraq in reaction to the ongoing insurgency in the country, and analyze two mobile applications, FireChat and Dawn of Glad Tidings.