Early Detection of Censorship Events with Psiphon Network Data Abstract—Over the past decade, circumvention tools have had a significant impact in ensuring access to censored content and preserving user privacy online. In addition, circumvention network data can be used to detect early indicators of Internet censorship and identify population-level effects of changes in the network environment. Monitoring network traffic for key indicators provides an opportunity to diagnose, analyze, and respond to online censorship events in real time. This paper examines the performance of Psiphon, a free and open source circumvention tool, during blocking events that occured over the past year in Iran, Iraq, and Turkmenistan. The study also offers insight into how Psiphon network data detec

Join for free to read