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Re: [TLS] Version in record MAC

Eric Rescorla <ekr@rtfm.com> Tue, 27 October 2015 18:54 UTC

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From: Eric Rescorla <ekr@rtfm.com>
Date: Tue, 27 Oct 2015 14:53:56 -0400
Message-ID: <CABcZeBOhqJrCVqRVzRtMEwFtLzRJ-W_3U_VJFf5apYCVJ1vDpA@mail.gmail.com>
To: Adam Langley <agl@imperialviolet.org>
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Cc: "David McGrew (mcgrew)" <mcgrew@cisco.com>, "tls@ietf.org" <tls@ietf.org>
Subject: Re: [TLS] Version in record MAC
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Sure. Like I said, I don't feel strongly about this, I just wanted to take
people's
temperature. I'm find with removing the seq from the AD.

-Ekr

On Tue, Oct 27, 2015 at 2:49 PM, Adam Langley <agl@imperialviolet.org>
wrote:

> On Tue, Oct 27, 2015 at 8:56 AM, Eric Rescorla <ekr@rtfm.com> wrote:
> > Yes, that's correct. But we could relax that restriction and make those
> work
> > if we wanted...
>
> Explicit nonces should not be used in TLS. I'm happy to be building
> things without them in mind.
>
> SIV modes, if turned into AEADs, would have to authenticate their
> nonces internally. RFC 5297 basically says that already
> (https://tools.ietf.org/html/rfc5297#section-3) That might mean that
> the nonce is prepended to the AD inside the AEAD abstraction, but that
> wouldn't be TLS's concern.
>
>
> Cheers
>
> AGL
>
> --
> Adam Langley agl@imperialviolet.org https://www.imperialviolet.org
>

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