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Re: [TLS] 0-RTT, server Application Data, and client Finished

Watson Ladd <watsonbladd@gmail.com> Wed, 27 January 2016 17:58 UTC

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Date: Wed, 27 Jan 2016 09:58:27 -0800
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From: Watson Ladd <watsonbladd@gmail.com>
To: Martin Thomson <martin.thomson@gmail.com>
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Cc: tls@ietf.org
Subject: Re: [TLS] 0-RTT, server Application Data, and client Finished
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On Jan 27, 2016 9:45 AM, "Martin Thomson" <martin.thomson@gmail.com> wrote:
>
> On 28 January 2016 at 02:09, Watson Ladd <watsonbladd@gmail.com> wrote:
> > All 0-RTT data is replayable, but I don't see what replaying a
> > authenticated replayable connection gets you.
>
> If the 0-RTT flight includes actions (especially non-idempotent ones)
> that only apply if the authentication is correct, then you get
> authenticated replayable actions.
>
> e.g., "please pay Watson $10, my certificate authenticates this request"

We already know non-idempotent actions cannot be put into 0 RTT.

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