AI BriefingVercel CDN Begins Supporting Encrypted Client Hello (ECH)
Key point
Vercel CDN has started supporting ECH, which enhances security by encrypting the SNI in the TLS handshake.
Details
Vercel CDN has started supporting Encrypted Client Hello (ECH) for domains managed via Vercel DNS.
ECH encrypts the Server Name Indication (SNI) during the TLS handshake. This protects against network observers determining which hostname the client is connecting to. When ECH is applied, only Vercel's shared ECH hostname, vercel-ech.com, is exposed to network observers instead of the actual hostname.
This feature is managed at the platform level and is automatically enabled in supported environments. It is currently supported in the latest versions of Chrome, Edge, and Firefox.
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