Re: [Cfrg] RGLC on draft-irtf-cfrg-chacha20-poly1305-01.txt

Yoav Nir <ynir.ietf@gmail.com> Mon, 06 October 2014 21:56 UTC

Return-Path: <ynir.ietf@gmail.com>
X-Original-To: cfrg@ietfa.amsl.com
Delivered-To: cfrg@ietfa.amsl.com
Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 248A61A8AC4 for <cfrg@ietfa.amsl.com>; Mon, 6 Oct 2014 14:56:06 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2
X-Spam-Level:
X-Spam-Status: No, score=-2 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, SPF_PASS=-0.001] autolearn=ham
Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 00HlBglMyyEx for <cfrg@ietfa.amsl.com>; Mon, 6 Oct 2014 14:56:03 -0700 (PDT)
Received: from mail-wi0-x233.google.com (mail-wi0-x233.google.com [IPv6:2a00:1450:400c:c05::233]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id DC39E1A6F2D for <cfrg@irtf.org>; Mon, 6 Oct 2014 14:55:59 -0700 (PDT)
Received: by mail-wi0-f179.google.com with SMTP id d1so6073820wiv.6 for <cfrg@irtf.org>; Mon, 06 Oct 2014 14:55:58 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=content-type:mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=AUow2G4CkITlEh0aOtrmv5nCd96QTFNFTOlLrPctYms=; b=HBXQdjX3z3JNev3lYfuIWfwuXZ44sNDCmn15+5GeXAeUCgEYBDO/rPQYMDyHN9sVdi apIz+5A7hgTl3SdB0LQIem9KINiwTryx5xHTyzQoVuQoVxi/01TvpkQBtxM1ZkKzYQzX VOrABQ1ou4nhZ/CscmHbDLLZe1TlJlxYwuuX9SRqbazHR5jHo266HgeLYqZcGRxokgjw CDGQhtjcL3ygitvGpEBlqbbAkrGgaD8wm+aU8U8YxBurR9eI2MJg6rrycB35tD8J9Eh2 3D84RqerYYhUA4GK9O0oIP6uTeTns1JPOtAny/lZz+6UomdTpBf4FIP6PRV5cUsFg2a0 Qt6A==
X-Received: by 10.194.78.238 with SMTP id e14mr32266450wjx.48.1412632558567; Mon, 06 Oct 2014 14:55:58 -0700 (PDT)
Received: from [192.168.1.104] (IGLD-84-228-54-144.inter.net.il. [84.228.54.144]) by mx.google.com with ESMTPSA id he2sm655951wib.4.2014.10.06.14.55.57 for <multiple recipients> (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Mon, 06 Oct 2014 14:55:58 -0700 (PDT)
Content-Type: text/plain; charset="windows-1252"
Mime-Version: 1.0 (Mac OS X Mail 7.3 \(1878.6\))
From: Yoav Nir <ynir.ietf@gmail.com>
In-Reply-To: <CAMfhd9UQr6wR4ooxfvkNDpmura5oSFask2JhnD+OERDA6tB30A@mail.gmail.com>
Date: Tue, 07 Oct 2014 00:55:56 +0300
Content-Transfer-Encoding: quoted-printable
Message-Id: <36143287-DBB5-4872-BD43-672B7737B89C@gmail.com>
References: <542D48CD.9060404@isode.com> <CAGvU-a7zd9jB_0vwipe4ALO5u5F0tk5BrfQ-0B5sLNjNRjZiPQ@mail.gmail.com> <9a348a00f974bffba1c3785464cd2032.squirrel@www.trepanning.net> <1CFF7FC2-DDC9-46AF-B574-4126379232DB@gmail.com> <CAMfhd9UQr6wR4ooxfvkNDpmura5oSFask2JhnD+OERDA6tB30A@mail.gmail.com>
To: Adam Langley <agl@imperialviolet.org>
X-Mailer: Apple Mail (2.1878.6)
Archived-At: http://mailarchive.ietf.org/arch/msg/cfrg/CfWEJ6lO1yGsns2BDoN9Iy3j8A4
Cc: "cfrg@irtf.org" <cfrg@irtf.org>
Subject: Re: [Cfrg] RGLC on draft-irtf-cfrg-chacha20-poly1305-01.txt
X-BeenThere: cfrg@irtf.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: Crypto Forum Research Group <cfrg.irtf.org>
List-Unsubscribe: <http://www.irtf.org/mailman/options/cfrg>, <mailto:cfrg-request@irtf.org?subject=unsubscribe>
List-Archive: <http://www.irtf.org/mail-archive/web/cfrg/>
List-Post: <mailto:cfrg@irtf.org>
List-Help: <mailto:cfrg-request@irtf.org?subject=help>
List-Subscribe: <http://www.irtf.org/mailman/listinfo/cfrg>, <mailto:cfrg-request@irtf.org?subject=subscribe>
X-List-Received-Date: Mon, 06 Oct 2014 21:56:06 -0000

On Oct 7, 2014, at 12:53 AM, Adam Langley <agl@imperialviolet.org> wrote:

> On Mon, Oct 6, 2014 at 2:50 PM, Yoav Nir <ynir.ietf@gmail.com> wrote:
>> I’m not quite sure I follow. The construction uses a 96-bit nonce precisely
>> so that we comply with RFC 5116. What requirement of 5116 are we not fitting
>> into?
> 
> I think Dan is just saying that the limits need to be specified. For
> example see page 8 in
> https://tools.ietf.org/html/draft-agl-tls-chacha20poly1305-04#section-5
> (although these values are wrong now).

Ah, I see. Thanks. I’ll get on it tomorrow.

Yoav