by Calipr Networking Group

CICS UMass Amherst

Information Controls Lab

Information Controls Lab (ICLab) is a project focused on collecting and analyzing information controls data on the Internet at a global scale.

At ICLab, we regularly run information controls experiments on a large number of vantage points spread all over the world. Some of these vantage points are Raspberry Pis running the Centinel software, while others are VPN clients and Virtual Private Servers (VPS). These experiments include a standard set of tests designed to detect and analyze web content blocking, the results of which are processed by our data management server and can be explored using the web application available here.


ICLab was featured among other censorship measurement platforms in a series of stories about Internet shutdowns by IEEE Spectrum

Our ICLab member, Zachary Weinberg, was interviewed by Jeremy Hsu from IEEE Spectrum about Internet shutdowns

ICLab paper got accepted to The 41st IEEE Symposium on Security and Privacy

Our paper titled: ICLab: A Global, Longitudinal Internet Censorship Measurement Platform recently got accepted to the IEEE Security and …



Phillipa Gill

Associate Professor - Principal Investigator


Nicolas Christin

Associate Professor


Zachary Weinberg

Postdoctoral Researcher


Shinyoung Cho

PhD student


Diogo Barradas

Visiting Researcher

Publications & Reports

How to Catch when Proxies Lie: Verifying the Physical Locations of Network Proxies with Active Geolocation

Internet users worldwide rely on commercial network proxies both to conceal their true location and identity, and to control their …

A Churn for the Better: Localizing Censorship using Network-level Path Churn and Network Tomography

Recent years have seen the Internet become a key vehicle for citizens around the globe to express political opinions and organize …

Exploring the Design Space of Longitudinal Censorship Measurement Platforms

Despite the high perceived value and increasing severity of online information controls, a data-driven understanding of the phenomenon …


Developing a Science of Internet Censorship Resistance

Opportunities and Challenges for Network Measurement

An empirical method for measuring Internet censorship

Phillipa Gill is an assistant professor in the Computer Science Department at the University of Massachusetts Amherst. Her work focuses …

Meet the Innovators Under 35 - Security Roundtable

Five years ago, when Phillipa Gill began a research fellowship at the University of Toronto’s Citizen Lab, she was surprised to find …

We are very grateful to the following sponsors for supporting our research:

Disclaimer: Any opinions, findings and conclusions or recommendations expressed in research outputs (published papers, talks, blog postings, etc.) are those of the author(s) and do not necessarily reflect the views of the sponsors.