From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on dcvr.yhbt.net X-Spam-Level: X-Spam-ASN: AS31976 209.132.180.0/23 X-Spam-Status: No, score=-3.5 required=3.0 tests=AWL,BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,RCVD_IN_DNSWL_HI,RCVD_IN_SORBS_SPAM, RP_MATCHES_RCVD shortcircuit=no autolearn=no autolearn_force=no version=3.4.0 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by dcvr.yhbt.net (Postfix) with ESMTP id 31BD81FC43 for ; Mon, 13 Mar 2017 17:48:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753196AbdCMRsJ (ORCPT ); Mon, 13 Mar 2017 13:48:09 -0400 Received: from mail-pf0-f194.google.com ([209.85.192.194]:33058 "EHLO mail-pf0-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750960AbdCMRsI (ORCPT ); Mon, 13 Mar 2017 13:48:08 -0400 Received: by mail-pf0-f194.google.com with SMTP id v190so19717355pfb.0 for ; Mon, 13 Mar 2017 10:48:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=TRqwYOt5R210MtgzTytOPzVMrf9Sd+9RmVrdgZ/JQr4=; b=jYXvepH6rdiLnjQ+uT03SdbS5sP7j1JtsZjpZhR9rZxWruH5sGb4juKx6hJmcnhmjr H3fcbVOMBmBamYoHNThB2X61EE4o89TkTmKfrjCP8/OojHrKdJNOXZ96dr2fYwdFwofS 6TT8XhR8FO1laNhbU3bivsXnVmoNaKXiSl1rjXw3+9rhlDN4oz8IBi58feZI9J+ypXNU MIl4qJv1qiBpafwUTHkx3M9uNf5iwcrs9fFp7Lqg6jCx2e+BuvZHCVXiNFqS3olxX+wz 4F0lO1nlZJvuTCtreyq1VuSg5VpCCly1z/tY/Gjs5+pQVXx3MXA8rR0bSPKvI23CziSD xcjA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=TRqwYOt5R210MtgzTytOPzVMrf9Sd+9RmVrdgZ/JQr4=; b=okJ31fyNWo7T6agIQbX8AY6NQ/qIsUHVkK5xuoFiPfcbUQ5nHxtrGurFjsSzsMQJIU 4JLHuYnJY2hoZo1t2v3jdv+ggNI1kw3zTOwUsUXHO+Rs8CeNjcKVAIUsqpYMh8rq7FKk tsSiA3q+UaZcwvyD2Bu6WqgeEStnnYkMvmuOCduq1ByY5Ky4/q3cwo0q3MiS2Twasy3G 3pQMopmCNkcrKcdnGM3GX/q3cKu6AHoKQcSYfx7lxMf4cyjc101pdH+ksiUzie4mssnD Gmfk7nS2opOuM+8IouSYFVwqn++KG0dlBAvekEmnudnQbbGF7URiW+QmjByIqXfcijn2 pdXQ== X-Gm-Message-State: AMke39mTSMkJsCrYi5yNrC4jWQvK7RFbV/WDlcFtVUK9k3Yuwtcx7PVNd76RWzsaG41PBg== X-Received: by 10.99.121.77 with SMTP id u74mr37972690pgc.200.1489427286713; Mon, 13 Mar 2017 10:48:06 -0700 (PDT) Received: from aiede.mtv.corp.google.com ([2620:0:1000:5b10:8575:602f:b00e:ca2f]) by smtp.gmail.com with ESMTPSA id k76sm33933340pfg.42.2017.03.13.10.48.05 (version=TLS1_2 cipher=AES128-SHA bits=128/128); Mon, 13 Mar 2017 10:48:06 -0700 (PDT) Date: Mon, 13 Mar 2017 10:48:04 -0700 From: Jonathan Nieder To: The Keccak Team Cc: git@vger.kernel.org, sbeller@google.com, bmwill@google.com, jonathantanmy@google.com, peff@peff.net, Linus Torvalds Subject: Re: RFC: Another proposed hash function transition plan Message-ID: <20170313174804.GH26789@aiede.mtv.corp.google.com> References: <20170304011251.GA26789@aiede.mtv.corp.google.com> <91a34c5b-7844-3db2-cf29-411df5bcf886@noekeon.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <91a34c5b-7844-3db2-cf29-411df5bcf886@noekeon.org> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: git-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org Archived-At: List-Archive: List-Post: Hi, The Keccak Team wrote: > We have read your transition plan to move away from SHA-1 and noticed > your intent to use SHA3-256 as the new hash function in the new Git > repository format and protocol. Although this is a valid choice, we > think that the new SHA-3 standard proposes alternatives that may also be > interesting for your use cases. As designers of the Keccak function > family, we thought we could jump in the mail thread and present these > alternatives. I indeed had some reservations about SHA3-256's performance. The main hash function we had in mind to compare against is blake2bp-256. This overview of other functions to compare against should end up being very helpful. Thanks for this. When I have more questions (which I most likely will) I'll keep you posted. Sincerely, Jonathan