From owner-freebsd-bugs@FreeBSD.ORG  Mon May 12 01:41:12 2003
Return-Path: <owner-freebsd-bugs@FreeBSD.ORG>
Delivered-To: freebsd-bugs@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 11DE337B43A
	for <bugs@freebsd.org>; Mon, 12 May 2003 01:41:12 -0700 (PDT)
Received: from critter.freebsd.dk (critter.freebsd.dk [212.242.86.163])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 26AF043F3F
	for <bugs@freebsd.org>; Mon, 12 May 2003 01:41:11 -0700 (PDT)
	(envelope-from phk@phk.freebsd.dk)
Received: from critter.freebsd.dk (localhost [127.0.0.1])
	by critter.freebsd.dk (8.12.9/8.12.9) with ESMTP id h4C8f9YP007681;
	Mon, 12 May 2003 10:41:10 +0200 (CEST)
	(envelope-from phk@phk.freebsd.dk)
To: netch@netch.kiev.ua
From: "Poul-Henning Kamp" <phk@phk.freebsd.dk>
In-Reply-To: Your message of "Mon, 12 May 2003 11:38:07 +0300."
             <20030512083807.GL73391@netch.kiev.ua> 
Date: Mon, 12 May 2003 10:41:09 +0200
Message-ID: <7680.1052728869@critter.freebsd.dk>
cc: bugs@freebsd.org
Subject: Re: /dev/random and /dev/urandom 
X-BeenThere: freebsd-bugs@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: Bug reports <freebsd-bugs.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-bugs>,
	<mailto:freebsd-bugs-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-bugs>
List-Post: <mailto:freebsd-bugs@freebsd.org>
List-Help: <mailto:freebsd-bugs-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-bugs>,
	<mailto:freebsd-bugs-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Mon, 12 May 2003 08:41:12 -0000

In message <20030512083807.GL73391@netch.kiev.ua>, Valentin Nechayev writes:
> Sun, May 11, 2003 at 23:29:32, phk wrote about "Re: /dev/random and /dev/urandom": 
>
>> There is one current concern with MD5: over-ratio of collisions.
>> 
>> What this means is that it may be a bit too easy to find a
>> MD5 input which generates a given MD5 output.
>
>Sorry, I might forget cryptography news for a few last years.
>Do you say there is _real_ example of two different data streams producing
>identical MD5 output _of its full length_?
>Please show an URL if things are already on this way...

No, but research has shown that this _may_ not be as hard to
accomplish as previously expected.

Appearantly this has got a lot of people jumping up and down,
pointing fingers at MD5, which IMO is an overreaction.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.