Jeffrey Knockel

Jeffrey Knockel I'm fighting to defend our safety and freedom online. I use novel techniques to uncover harmful software behavior. I reveal applications’ secret censorship rules and hidden surveillance activity, and I expose how gaps in applications’ security put the safety and privacy of our data in jeopardy.

I'm now a Senior Research Associate at the Citizen Lab.

Selected Publications

2024

2023

2022

2021

In May 2021, I published an interactive Lennon Wall comprised of 5,487 images censored by Tencent relating to the Hong Kong Anti-Extradition Law Protests, which I also have a demo of below. Click or tap a tile in the mosaic below to view the censored image full screen!

Photo mosaic

Please enable Javascript to try the demo!

2020

2019

2018

2017

I successfully defended my dissertation in December 2017: Measuring Decentralization of Chinese Censorship in Three Industry Segments. My graduate research was advised by Jed Crandall and Jared Saia.

2016

2015

2014

2013

2012

2011

Selected Talks

Photo of Jeffrey Knockel atop Wheeler Peak (New Mexico)

Other