Re: [TLS] I-D Action: draft-ietf-tls-certificate-compression-05.txt

Jeremy Harris <jgh@wizmail.org> Fri, 05 April 2019 10:34 UTC

Return-Path: <jgh@wizmail.org>
X-Original-To: tls@ietfa.amsl.com
Delivered-To: tls@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 0AAF01203B0 for <tls@ietfa.amsl.com>; Fri, 5 Apr 2019 03:34:43 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.999
X-Spam-Level:
X-Spam-Status: No, score=-1.999 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=wizmail.org
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 s7sIl-OZUGjK for <tls@ietfa.amsl.com>; Fri, 5 Apr 2019 03:34:41 -0700 (PDT)
Received: from wizmail.org (wizmail.org [IPv6:2a00:1940:107::2:0:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 55F35120369 for <tls@ietf.org>; Fri, 5 Apr 2019 03:34:41 -0700 (PDT)
ARC-Seal: i=1; cv=none; a=rsa-sha256; d=wizmail.org; s=r201803; t=1554460481; b=Qsb2MYvSdH9hg/b17px2xpOi1AM2elfV0qFJ8jZJN73s+3kgX2pviD/aFK2odwf2W56HSUQowA MOcEKUkaL9JTyyTCUvRNsoO5N6qrwiogBwdkFctemoTG8ICqx3sLIyjbfc1ZWltl6KWNlQx6xG yzfIsdTQAniq0tcrXH9Df8s=;
ARC-Authentication-Results: i=1; wizmail.org; iprev=fail smtp.remote-ip=2a00:b900:109e:0:855c:1404:1b9d:3a94; auth=pass (PLAIN) smtp.auth=jgh@wizmail.org
ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed; d=wizmail.org; s=r201803; t=1554460481; bh=RXoZpJD00YgfVwcaLShE1ryvoaBF+kO8GNc4RXb2Cmk=; h=Content-Transfer-Encoding:Content-Type:In-Reply-To:MIME-Version:Date: Message-ID:From:References:To:Subject:DKIM-Signature; b=FTxhRHU5TWz+KsHWnO/RmBam02sd42wH+CiKZLEy2Zq8rlpSje8ZIMET+3zlRQSyRdRq8ZrbMs +WBARHll9+j5htofPxWcsaBuWcAlK9AuUsK3uwDQ4qcqUIp1RGQjl675dbrqBM5tMdFVgHTCB6 NFgfxTqo25AXFc62Tqi+lRI=;
DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=wizmail.org ; s=r201803; h=Content-Transfer-Encoding:Content-Type:In-Reply-To: MIME-Version:Date:Message-ID:From:References:To:Subject:From:Sender:Reply-To: Subject:Date:Message-ID:To:Cc:MIME-Version:Content-Type: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To: References:List-Id:List-Help:List-Unsubscribe:List-Subscribe:List-Post: List-Owner:List-Archive; bh=GdqXYQ44iBM57FztwI/O0nOo4sj5+x0JaoYQHbzcBQc=; b=E SSG0dFHLZu53y3Fp3cAr9wg3uxRsEPNYi836NDR8b9Cg0MP59E/zd2L2IRZtPNiR5Q5PpSGenBeam LlN5GGE73No8u3BefIA/2C1OnVtdwbvZyX47I7L6BDvaUz+It2QhHYIGPoJ2jphVweuYIQwYp7dea 1FwICh80vzcAM7Is=;
Authentication-Results: wizmail.org; iprev=fail smtp.remote-ip=2a00:b900:109e:0:855c:1404:1b9d:3a94; auth=pass (PLAIN) smtp.auth=jgh@wizmail.org
Received: from [2a00:b900:109e:0:855c:1404:1b9d:3a94] (helo=lap.dom.ain) by wizmail.org (Exim 4.92.106) (TLSv1.2:ECDHE-RSA-AES128-GCM-SHA256:128) with esmtpsa id 1hCMBC-0006oB-SQ for tls@ietf.org (return-path <jgh@wizmail.org>); Fri, 05 Apr 2019 10:34:39 +0000
To: tls@ietf.org
References: <155445860706.13142.18114741162189514330@ietfa.amsl.com>
From: Jeremy Harris <jgh@wizmail.org>
Openpgp: preference=signencrypt
Autocrypt: addr=jgh@wizmail.org; prefer-encrypt=mutual; keydata= mQENBFWABsQBCADTFfb9EHGGiDel/iFzU0ag1RuoHfL/09z1y7iQlLynOAQTRRNwCWezmqpD p6zDFOf1Ldp0EdEQtUXva5g2lm3o56o+mnXrEQr11uZIcsfGIck7yV/y/17I7ApgXMPg/mcj ifOTM9C7+Ptghf3jUhj4ErYMFQLelBGEZZifnnAoHLOEAH70DENCI08PfYRRG6lZDB09nPW7 vVG8RbRUWjQyxQUWwXuq4gQohSFDqF4NE8zDHE/DgPJ/yFy+wFr2ab90DsE7vOYb42y95keK tTBp98/Y7/2xbzi8EYrXC+291dwZELMHnYLF5sO/fDcrDdwrde2cbZ+wtpJwtSYPNvVxABEB AAG0JkplcmVteSBIYXJyaXMgKG5vbmUpIDxqZ2hAd2l6bWFpbC5vcmc+iQE7BBMBAgAlAhsD BgsJCAcDAgYVCAIJCgsEFgIDAQIeAQIXgAUCVYAYBAIZAQAKCRC85YyM5B8y34iFB/9wozIY RogNdY1aejFFixb6++y4b1riyjMvWEULeEzDlQ0lMT6Z3PxXhZILD4y4aP7Kzx0ozXa5qaKy 41EAPKQoPipnRAH04QytJbIERvz8Tot/LeCVKUc0G9DVxOPBD03czTgqgz4EjV2qvnLF+rTU 0YBevrNCluKosGSd+3RvLWVu0hBhn9pELKfXJNSQXZb+TpHDhSDZ/gCrglBEOhA6YWbDb/4g z+5TFKdk+B++iAQZSHv7zISabjN+BPYgI47A+MU4JycoXaAUnMc0l5ba6fGNaIrzruE4aAZr lP5o+7mlU9Mm0QJqdqYxYPAiplJGrZv+YXH1fp5ueEK3l+NGuQENBFWABsQBCADphLHaKToR uR/E7THerBiCjDatwCaETOKOTY2zRBQpaQ32p/F2XIGLS8Cc27+grZSKQ6ZX0ZN47O+AFyFH F8DH90IXZFpJR3Rb8zgXT8jnLX08DM31eECZHnRzFhGlOmq6WAUlqB3GKCPUCY2c4eTRXyoX LteTxrXCYoj45y/YmvlZrlonBNjPBAyHiO/LNz+V7fZtNsN7N/XGrnLbcdNfNd+SD1ENmbLJ 8RvyymxguTyB/ka9JdjHHIoQEJ6L166B3hhfCHpt8iC0GPZkti9IMl0NoJ029jJm3Jq1qEce EBn5H5QMGn6Fq64iXwTsO1TMNUwpWx8pjvV7wVIxjI8ZABEBAAGJAR8EGAECAAkFAlWABsQC GwwACgkQvOWMjOQfMt9N6Af8CS2CTrMQFdhkGEtBXmL4ifD8UHFkBRBGmM8ZL2fWUBTZXT8m rdRMOK6tcPnKWaCvWvKr0knt970j/DyAgFmH8hgOi3yctigFecVDjjilAeCJMq38s1tYKYiL DbBdHWtdkA9uHZwq3lfd3QxcEEO3QamQF+dO7h8gAOXlG+po87Hm+E0wz4swIB8+S37Jzrx9 uu0LSFDfJCTK+TIKGa5Un8LxPxyq9WnnNDh72zK7BiRidk/s40KcNod83NM4Hn/sbGfyLa8s S0F3ME0S+ocSMOiu/ZHHOiwpLYNbwTJ7stZxGsrguWeT9P+amxbA/YlK95LedstwvN+WcHZ7 d++Arg==
Message-ID: <740c8243-395d-61ee-ad64-58557ec99526@wizmail.org>
Date: Fri, 5 Apr 2019 11:34:34 +0100
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.6.1
MIME-Version: 1.0
In-Reply-To: <155445860706.13142.18114741162189514330@ietfa.amsl.com>
Content-Type: text/plain; charset=utf-8
Content-Language: en-GB
Content-Transfer-Encoding: 7bit
X-Pcms-Received-Sender: [2a00:b900:109e:0:855c:1404:1b9d:3a94] (helo=lap.dom.ain) with esmtpsa
Archived-At: <https://mailarchive.ietf.org/arch/msg/tls/MPmqYWw5KSFgdJParbwzy6nOtp8>
Subject: Re: [TLS] I-D Action: draft-ietf-tls-certificate-compression-05.txt
X-BeenThere: tls@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: "This is the mailing list for the Transport Layer Security working group of the IETF." <tls.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/tls>, <mailto:tls-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/tls/>
List-Post: <mailto:tls@ietf.org>
List-Help: <mailto:tls-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/tls>, <mailto:tls-request@ietf.org?subject=subscribe>
X-List-Received-Date: Fri, 05 Apr 2019 10:34:43 -0000

On 05/04/2019 11:03, internet-drafts@ietf.org wrote:
>    In TLS handshakes, certificate chains often take up the majority of
>    the bytes transmitted.
> 
>    This document describes how certificate chains can be compressed to
>    reduce the amount of data transmitted and avoid some round trips.

Reducing the number of bytes (and possibly packets) is a good thing,
but how does this reduce roundtrips?
-- 
Thanks,
  Jeremy