Last year, the OONI team collaborated with Kathrin Elmenhorst on adding HTTP/3 support to OONI Probe (through our urlgetter research tool) to investigate HTTP/3 censorship in China, Iran, Kazakhstan, and India.

The results of this research were documented in a research paper that was published by the AMC Internet Measurement Conference: https://dl.acm.org/doi/abs/10.1145/3487552.3487836

Today, Kathrin (who's now an OTF Information Controls Fellow with OONI) published a blog post which provides a summary of these research findings: https://ooni.org/post/2022-http3-measurements-paper/

We discovered that the deployment of HTTP/3 censorship varies significantly between the observed countries and networks. While some censors do not filter HTTP/3 traffic at all and some collaterally block HTTP/3 hosts, we uncovered HTTP/3-targeting censorship in Iran.

Read Kathrin's summary of findings to learn more: https://ooni.org/post/2022-http3-measurements-paper/

Best,

OONI team.