IETF Logo Mail Archive

Re: [openpgp] OpenPGP encryption block modes

Werner Koch <wk@gnupg.org> Fri, 05 August 2022 07:42 UTC

Return-Path: <wk@gnupg.org>
X-Original-To: openpgp@ietfa.amsl.com
Delivered-To: openpgp@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id F02D2C15AD3B for <openpgp@ietfa.amsl.com>; Fri, 5 Aug 2022 00:42:14 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2.106
X-Spam-Level:
X-Spam-Status: No, score=-2.106 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_ZEN_BLOCKED_OPENDNS=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01, URIBL_BLOCKED=0.001, URIBL_DBL_BLOCKED_OPENDNS=0.001, URIBL_ZEN_BLOCKED_OPENDNS=0.001] autolearn=ham autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=gnupg.org
Received: from mail.ietf.org ([50.223.129.194]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id UCeMG0lUgedq for <openpgp@ietfa.amsl.com>; Fri, 5 Aug 2022 00:42:10 -0700 (PDT)
Received: from kerckhoffs.g10code.com (kerckhoffs.g10code.com [IPv6:2001:aa8:fff1:100::22]) (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 84DB4C159493 for <openpgp@ietf.org>; Fri, 5 Aug 2022 00:42:10 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnupg.org; s=20181017; h=Content-Type:MIME-Version:Message-ID:In-Reply-To:Date: References:Subject:Cc:To:From:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=pNLVNzk6PHMSDyXEdbCOP5i8I93P3pX5zhv9b6wFfHs=; b=Ef3QHO1TBuLV6Co+ko9dJQhE9Q Xd6VZ8V6/G5RBQq99UF32clBA1gF9dRipaQSGWzoHqLrVc3jjeJqZ0GnVN1rt//Sq1CQP+iEZpHBA 4pQ91u/Pby8ZOhx0YwudTixFUCulvPix3mOzFe6BRIbojlthBAf3RdWJk6M0iA632khM=;
Received: from uucp by kerckhoffs.g10code.com with local-rmail (Exim 4.89 #1 (Debian)) id 1oJryB-0000Nm-S1 for <openpgp@ietf.org>; Fri, 05 Aug 2022 09:42:07 +0200
Received: from wk by wheatstone.g10code.de with local (Exim 4.92 #5 (Debian)) id 1oJry8-00017I-HK; Fri, 05 Aug 2022 09:42:04 +0200
From: Werner Koch <wk@gnupg.org>
To: Bruce Walzer <bwalzer@59.ca>
Cc: Daniel Huigens <d.huigens@protonmail.com>, justus@sequoia-pgp.org, openpgp@ietf.org
References: <YuAErZRsF/KbOw1s@watt.59.ca> <87edy7keb6.fsf@thinkbox> <YuFc+w02FiRQmHcg@watt.59.ca> <87bktajjvq.fsf@thinkbox> <YuKpxp0/Dy1DfC19@watt.59.ca> <875yjhjg2c.fsf@thinkbox> <87r124m64c.fsf@wheatstone.g10code.de> <YulX9jI1+wOCwLJq@ohm.59.ca> <Q6EUpbQm0e5f1OiU-77Old9p9FXyLCaFZ8pMm7PTt8VTLQJaXRQzWIDSwc3db6yI-56imyOaTNdt9TC8Zrm1jN_kPKxFYH4OqEu6o-Wfquo=@protonmail.com> <YuvlHdLz0Sfle7Ot@ohm.59.ca>
X-message-flag: Mails containing HTML will not be read! Please send only plain text.
Jabber-ID: wk@jabber.gnupg.org
Mail-Followup-To: Bruce Walzer <bwalzer@59.ca>, Daniel Huigens <d.huigens@protonmail.com>, justus@sequoia-pgp.org, openpgp@ietf.org
Date: Fri, 05 Aug 2022 09:41:56 +0200
In-Reply-To: <YuvlHdLz0Sfle7Ot@ohm.59.ca> (Bruce Walzer's message of "Thu, 4 Aug 2022 10:26:21 -0500")
Message-ID: <87a68ji1bv.fsf@wheatstone.g10code.de>
User-Agent: Gnus/5.13 (Gnus v5.13)
MIME-Version: 1.0
Content-Type: multipart/signed; boundary="=Sleet_Arnett_clandestine_smugglers_import_RFI_sneakers_Marxist_MSNBC"; micalg="pgp-sha256"; protocol="application/pgp-signature"
Archived-At: <https://mailarchive.ietf.org/arch/msg/openpgp/DaE-nT8-xWzpyU_bGd0yNs5IHNw>
Subject: Re: [openpgp] OpenPGP encryption block modes
X-BeenThere: openpgp@ietf.org
X-Mailman-Version: 2.1.39
Precedence: list
List-Id: "Ongoing discussion of OpenPGP issues." <openpgp.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/openpgp>, <mailto:openpgp-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/openpgp/>
List-Post: <mailto:openpgp@ietf.org>
List-Help: <mailto:openpgp-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/openpgp>, <mailto:openpgp-request@ietf.org?subject=subscribe>
X-List-Received-Date: Fri, 05 Aug 2022 07:42:15 -0000

On Thu,  4 Aug 2022 10:26, Bruce Walzer said:

> I thought you guys were mostly doing messaging. Why would performance
> be important in that environment? Speaking of messaging, wouldn't you

A major use case is to encrypt bulk data in the range for hundreds of
GiByte and often up to several TiByte.  And that is not only for
backups.  It matters whether it takes 6 hours or 45 minutes.

Actually this is also the reason why we came up with the chunked OCB
mode - to detect those rare transmission errors more early.


Salam-Shalom,

   Werner


-- 
The pioneers of a warless world are the youth that
refuse military service.             - A. Einstein

v2.23.0 | Report a Bug | By Email