From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on yquem.inria.fr X-Spam-Level: X-Spam-Status: No, score=0.0 required=5.0 tests=none autolearn=disabled version=3.1.3 X-Original-To: caml-list@yquem.inria.fr Delivered-To: caml-list@yquem.inria.fr Received: from mail3-relais-sop.national.inria.fr (mail3-relais-sop.national.inria.fr [192.134.164.104]) by yquem.inria.fr (Postfix) with ESMTP id 8FB43BBAF for ; Thu, 4 Dec 2008 22:52:32 +0100 (CET) X-IronPort-AV: E=Sophos;i="4.33,716,1220220000"; d="scan'208";a="19926996" Received: from concorde.inria.fr ([192.93.2.39]) by mail3-smtp-sop.national.inria.fr with ESMTP; 04 Dec 2008 22:52:32 +0100 Received: from mail3-relais-sop.national.inria.fr (mail3-relais-sop.national.inria.fr [192.134.164.104]) by concorde.inria.fr (8.13.6/8.13.6) with ESMTP id mB4LqVJ8020057 (version=TLSv1/SSLv3 cipher=RC4-SHA bits=128 verify=OK) for ; Thu, 4 Dec 2008 22:52:32 +0100 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AmkAAAvgN0lCbwQZkWdsb2JhbACTUAEBAQEJCwoHEQS9C4MF X-IronPort-AV: E=Sophos;i="4.33,716,1220220000"; d="scan'208";a="19926993" Received: from out1.smtp.messagingengine.com ([66.111.4.25]) by mail3-smtp-sop.national.inria.fr with ESMTP; 04 Dec 2008 22:52:26 +0100 Received: from compute1.internal (compute1.internal [10.202.2.41]) by out1.messagingengine.com (Postfix) with ESMTP id 786B91CBA9E; Thu, 4 Dec 2008 16:52:25 -0500 (EST) Received: from heartbeat2.messagingengine.com ([10.202.2.161]) by compute1.internal (MEProxy); Thu, 04 Dec 2008 16:52:25 -0500 X-Sasl-enc: gdxSyFpwTpAgcv20UytfbR9yFIEPZpbf+OKIx62EWHMe 1228427545 Received: from [192.168.1.10] (ALyon-157-1-5-87.w90-28.abo.wanadoo.fr [90.28.180.87]) by mail.messagingengine.com (Postfix) with ESMTPSA id AEDBD28CB9; Thu, 4 Dec 2008 16:52:24 -0500 (EST) Message-ID: <493850FA.7090303@ens-lyon.org> Date: Thu, 04 Dec 2008 22:51:54 +0100 From: Martin Jambon User-Agent: Thunderbird 2.0.0.17 (X11/20081008) MIME-Version: 1.0 To: Florian Hars Cc: Alan Schmitt , caml-list@inria.fr Subject: Re: [Caml-list] Computing with big numbers? References: <999499.25121.qm@web111514.mail.gq1.yahoo.com> <4937FFEE.9060709@bik-gmbh.de> In-Reply-To: <4937FFEE.9060709@bik-gmbh.de> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Miltered: at concorde with ID 4938511F.000 by Joe's j-chkmail (http://j-chkmail . ensmp . fr)! X-Spam: no; 0.00; ens-lyon:01 hars:01 schmitt:01 hashes:01 trivial:01 hash:01 nostradamus:98 wrote:01 caml-list:01 jambon:01 jambon:01 alan:02 unison:02 florian:03 playstation:94 Florian Hars wrote: > Alan Schmitt schrieb: >> But I don't think this applies here, as the hashes I'm >> looking at are the one used by Unison to identify file contents. > > Then it is *especially* relevant, as it is quite trivial to generate > several files with different content and the same MD5 hash, all you > need is a Playstation 3: > http://www.win.tue.nl/hashclash/Nostradamus/ It's like being able to manufacture a lock and the key that goes with it: big deal! :-) Martin -- http://mjambon.com/