From owner-freebsd-security@FreeBSD.ORG Tue Mar 8 14:16:30 2005 Return-Path: Delivered-To: freebsd-security@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 8899016A4CE for ; Tue, 8 Mar 2005 14:16:30 +0000 (GMT) Received: from saturn.criticalmagic.com (saturn.criticalmagic.com [64.74.124.105]) by mx1.FreeBSD.org (Postfix) with ESMTP id 3898943D39 for ; Tue, 8 Mar 2005 14:16:30 +0000 (GMT) (envelope-from rcoleman@criticalmagic.com) Received: from [172.16.0.201] (adsl-34-204-197.asm.bellsouth.net [67.34.204.197]) by saturn.criticalmagic.com (Postfix) with ESMTP id 4BC8E3BD10; Tue, 8 Mar 2005 09:16:29 -0500 (EST) Message-ID: <422DB45E.2050900@criticalmagic.com> Date: Tue, 08 Mar 2005 09:19:10 -0500 From: Richard Coleman User-Agent: Mozilla Thunderbird 1.0 (Windows/20041206) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Ian G References: <999.1110223995@critter.freebsd.dk> <422D9B5E.3020303@iang.org> In-Reply-To: <422D9B5E.3020303@iang.org> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit cc: freebsd-security@freebsd.org Subject: Re: New entropy source proposal. X-BeenThere: freebsd-security@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Security issues [members-only posting] List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 08 Mar 2005 14:16:30 -0000 Ian G wrote: > You might want to check out: > > http://www.av8n.com/turbid/paper/turbid.htm > > There is some controversy over the new FreeBSD /dev/random system, > is there any analysis of the system? I wasn't able to find anything > from a brief search. > > iang The FreeBSD /dev/random was originally based on the Yarrow paper that is given as a reference in the paper above. But I think the current implementation is more similar to to the version of Yarrow that is discussed in Bruce Schneier's "Practical Cryptography". I'm not sure if that is a coincidence or not. The paper mentioned above only briefly mentions Yarrow, and doesn't mention the FreeBSD implementation, so it's hard to compare the two. At first glance, both systems appear strong. Richard Coleman rcoleman@criticalmagic.com