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Re: [Unbearable] 0-RTT Token Binding: When to switch exporters?

Andrei Popov <Andrei.Popov@microsoft.com> Tue, 28 February 2017 23:34 UTC

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From: Andrei Popov <Andrei.Popov@microsoft.com>
To: Nick Harper <nharper@google.com>
Thread-Topic: [Unbearable] 0-RTT Token Binding: When to switch exporters?
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Date: Tue, 28 Feb 2017 23:34:55 +0000
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Cc: IETF Tokbind WG <unbearable@ietf.org>
Subject: Re: [Unbearable] 0-RTT Token Binding: When to switch exporters?
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>> It seems that the right thing to do is not allow Token Binding 
>> messages until exporter_secret is available.
>
> That restriction would effectively mean that Token Binding can't be 
> used with 0-RTT.

More precisely, this would mean that TB (and bound tokens) cannot be sent as part of 0-RTT data. TB (and bound tokens) could still be used after the server's response, as soon as exporter_secret is available.

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