From mboxrd@z Thu Jan 1 00:00:00 1970 From: "C. Scott Ananian" Subject: Re: SHA1 hash safety Date: Tue, 19 Apr 2005 18:48:57 -0400 (EDT) Message-ID: References: <20050416123155.GA19908@elte.hu> <4261132A.3090907@khandalf.com> <4261852B.6090507@khandalf.com> <20050418074323.GA29765@hexapodia.org> <20050419223027.GA26100@localhost> Mime-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Cc: Andy Isaacson , omb@bluewin.ch, git@vger.kernel.org X-From: git-owner@vger.kernel.org Wed Apr 20 00:45:50 2005 Return-path: Received: from vger.kernel.org ([12.107.209.244]) by ciao.gmane.org with esmtp (Exim 4.43) id 1DO1TT-0007d4-L9 for gcvg-git@gmane.org; Wed, 20 Apr 2005 00:45:43 +0200 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261721AbVDSWtZ (ORCPT ); Tue, 19 Apr 2005 18:49:25 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261719AbVDSWtY (ORCPT ); Tue, 19 Apr 2005 18:49:24 -0400 Received: from sincerity-forever.csail.mit.edu ([128.30.67.31]:26546 "EHLO sincerity-forever.csail.mit.edu") by vger.kernel.org with ESMTP id S261721AbVDSWtR (ORCPT ); Tue, 19 Apr 2005 18:49:17 -0400 Received: from catfish.lcs.mit.edu ([128.30.67.25] helo=cag.csail.mit.edu) by sincerity-forever.csail.mit.edu with esmtp (Exim 3.36 #1 (Debian)) id 1DO1Wl-0001KA-00; Tue, 19 Apr 2005 18:49:07 -0400 To: David Meybohm In-Reply-To: <20050419223027.GA26100@localhost> Sender: git-owner@vger.kernel.org Precedence: bulk X-Mailing-List: git@vger.kernel.org On Tue, 19 Apr 2005, David Meybohm wrote: > But doesn't this require assuming the distribution of MD5 is uniform, > and don't the papers finding collisions in less show it's not? So, your > birthday-argument for calculating the probability wouldn't apply, because > it rests on the assumption MD5 is uniform, and it isn't. No, the collision papers don't show this at all. --scott atomic strategic HBDRILL SARANAC COBRA JUDY Ft. Meade assassination politics Mossad HOPEFUL ZPSEMANTIC DTFROGS HTKEEPER LITEMPO LIONIZER operation ( http://cscott.net/ )