Unverified50% confidenceFactExact time
ECH is a TLS 1.3 extension used to encrypt fields such as SNI in the ClientHello, and its configuration can be distributed base64-encoded via the DNS HTTPS record or the ech field in Alt-Svc parameters.
1
Sources
50%
Confidence
Long-term
Relevance
10/18/2026
First Seen
Sources
Related Entities
Related Claims
UnverifiedECH使用HPKE非对称加密内层ClientHello，服务端公钥发布在DNS HTTPS资源记录（HTTPS RR，RFC 9460）中77% similarUnverifiediMessage 使用椭圆曲线 Diffie-Hellman（ECDH）协商会话密钥，以 AES-128-CTR 模式加密消息正文，并采用 ECDSA 算法签名防篡改66% similarUnverifiedThe ACME protocol was originally designed by the Internet Security Research Group (ISRG) for Let's Encrypt and later became IETF standard RFC 8555.64% similarUnverifiedThe BLE protocol is a low-power subset introduced in the Bluetooth 4.0 specification; pairing uses the LE Secure Connections mechanism and generates a Long-Term Key (LTK) via ECDH key exchange.62% similar
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