Christian Huitema <huit...@huitema.net> writes:

>Would it be possible to engineer a hidden channel in the TLS 1.3 Hello? I bet
>that's quite doable. I am sure that fields like "opaque Random[32]" or "opaque
>legacy_session_id<0..32>" could be used creatively, and there are other fields
>in common extensions that could also be of service.

I'd thought about that too, thus my comment about subliminal signalling, the
problem is that if you've got a standardised subliminal message than it's not
really a subliminal message any more.

Peter.

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