llm/52671bed-a32b-4001-8725-0574603461fb/topic-15-63a1f489-8ab9-4a84-b81a-62e5d5803858-output.json
Encrypted Client Hello (ECH) leverages new DNS "HTTPS" records to encrypt server names during handshakes, finally closing the long-standing privacy gap known as the SNI leak. By hiding specific destinations behind a shared IP, this technology is particularly powerful for users of CDNs and bulk hosts, as it prevents eavesdroppers from distinguishing between different websites hosted on the same server. This development forces state-level censors into a difficult "overblocking" dilemma, where they must choose between allowing restricted content or disrupting massive portions of the internet to target a single site. However, the effectiveness of ECH remains a subject of debate, as sophisticated censors may still attempt to thwart the protocol by blocking the necessary DNS records or dropping encrypted connections entirely at the network level.