alt Hacker NewsHow would you (an arbitrary web server) fingerprint a TLS connection if the Client Hello is encrypted?
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szmarczak • today at 11:10 AM
By decrypting it? I don't think you know how TLS, or E2E works in general. ISP doesn't perform the fingerprinting, the server does.
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The website owner (or cloudflare in this case) has the keys to decrypt the client hello. That's necessary for routing information.