Censored Planet

The Project

Censored planet is a platform for measuring various types of interference on the Internet. We use thousands of remote infrastructural vantage points from over 170 countries to continuously monitor disruption tactics used by authorities around the world. By making our data and measurement practices easily accessible, we seek to facilitate multi-disciplinary research that promotes accountability and transparency.

💥 New Report

We investigated the carrier-level HTTPS interception that significantly weakens Internet for Kazakh Internet users. Read our report to learn more: https://censoredplanet.org/kazakhstan

See live measurement results here: https://censoredplanet.org/kazakhstan/live

What can you do with Censored Planet?

By maintaining coverage and continuity of our measurements, we aim to use our longitudinal data to observe how censorship evolves over time. When political events occur, our data can help political and social scientists understand how these events relate to changes in blocking and disruption. Our data can also help researchers distinguish likely censorship from other network failures in their datasets. Using our visualizations, we also aim to let users know what their governments are denying them. Finally, companies can use our data to estimate financial losses from markets that can’t reach their content.

Our Data

Recent datasets of our remote interference measurements

Research Projects

The following projects are part of Censored Planet

  • Augur

    Internet-Wide Measurement of Network Layer Disruption

    Augur is a system that utilizes TCP/IP side channels to measure reachability between two Internet locations without directly controlling a measurement vantage point at either location. It is a scalable, statistically robust methods to infer network-layer filtering, and capable of performing continuous monitoring of global Internet disruption. It is currently deployed and runs Internet-wide disruption tests in nearly 180 countries against sites known to be frequently blocked.

  • Satellite

    Global Detection Of DNS-Layer Disruption

    Satellite measures global trends in website deployment and accessibility via the consistency of DNS records. Satellite watches DNS resolution through active measurements of DNS resolvers across the IPv4 address space. A data-set of the alexa top 10,000 domains is collected each week. Satellite is committed to openness, with all code and data made publicly available.

  • Quack

    Scalable Remote Measurement of Application-Layer Disruption

    Quack is a technique for detecting content-level disruption. Quack sacrifices idenitification of tightly controlled DPI behavior in exchange for broad measurements of keywords and protocol disruption.

  • 403 Forbidden

    A measurement study of serverside geographic disruption

    Many sites practice geoblocking due to legal requirements or other business reasons, but excessive blocking can needlessly deny valuable content and services to entire national populations. To help researchers and policymakers understand this phenomenon, we develop a semi-automated system to detect instances where whole websites were rendered inaccessible due to geoblocking.


The University of Michigan Google The National Science Foundation


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