OONI 195d ago

# Measuring and Understanding ECH Deployment ## Evidence from OONI on how ECH strenghthens end-to-end resilience An overview of how ECH is deployed and measured globally, and how OONI detects censorship and interference. Presented for originally at the IETF ARMOR to support research on end-to-end protocol resilience, now the Extended Play (EP) version is presented at PEARG. This is a short presentation (15 mins + Q and A) for the IETF 124 community on measuring and understanding Encrypted ClientHello (ECH) deployment. This talk highlights how OONI’s ECHCheck test detects interference, reveals emerging censorship patterns, and supports the broader goal of strengthening protocol resilience on the Open Internet. This talk is derived from the IETF ARMOR side-meeting even shorter one (10 minutes) and explores how Encrypted ClientHello (ECH) is deployed in the wild and how OONI’s measurements uncovers real-world blocking and interference. A data-driven look at why ECH matters for privacy, security, and the resilience of Internet protocols.