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Re: [TLS] [ECH] Reverting the config ID change

Eric Rescorla <ekr@rtfm.com> Wed, 17 February 2021 00:34 UTC

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From: Eric Rescorla <ekr@rtfm.com>
Date: Tue, 16 Feb 2021 16:34:02 -0800
Message-ID: <CABcZeBMs-_GaQDVVtFr0qMnFLNOxndTja8G1mFVX=wp=0o_BaQ@mail.gmail.com>
To: Carrick Bartle <cbartle891@icloud.com>
Cc: Martin Thomson <mt@lowentropy.net>, "<tls@ietf.org>" <tls@ietf.org>
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Subject: Re: [TLS] [ECH] Reverting the config ID change
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On Tue, Feb 16, 2021 at 4:21 PM Carrick Bartle <cbartle891@icloud.com>
wrote:

>  It's not significant extra complexity to have this field bigger and it
> basically makes it impossible to have any structure.
>
>
> What do you mean by structure? How does a byte not provide sufficient
> "structure"?
>

It's not long enough to encode much. As a concrete example, what if the
label is actually an encrypted version of the private key? Or you have a
distributed generation algorithm that you don't want to synchronize?

-Ekr

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