Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752828AbXLHScS (ORCPT ); Sat, 8 Dec 2007 13:32:18 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751455AbXLHScH (ORCPT ); Sat, 8 Dec 2007 13:32:07 -0500 Received: from srv5.dvmed.net ([207.36.208.214]:49027 "EHLO mail.dvmed.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751459AbXLHScG (ORCPT ); Sat, 8 Dec 2007 13:32:06 -0500 Message-ID: <475AE2ED.3050700@garzik.org> Date: Sat, 08 Dec 2007 13:31:09 -0500 From: Jeff Garzik User-Agent: Thunderbird 2.0.0.9 (X11/20071115) MIME-Version: 1.0 To: Theodore Tso , Mike McGrath , Jon Masters , Matt Mackall , Alan Cox , Ray Lee , Adrian Bunk , Marc Haber , linux-kernel@vger.kernel.org Subject: Re: Why does reading from /dev/urandom deplete entropy so much? References: <20071204210827.GE19691@waste.org> <4755C423.60907@redhat.com> <20071204221525.GG19691@waste.org> <4755D350.1080801@redhat.com> <20071204223345.GJ19691@waste.org> <4756B50B.3060100@redhat.com> <20071205144934.GL7259@thunk.org> <1197099477.20786.149.camel@perihelion> <20071208173204.GI17037@thunk.org> <475AD585.7020908@redhat.com> <20071208174908.GJ17037@thunk.org> In-Reply-To: <20071208174908.GJ17037@thunk.org> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Score: -4.4 (----) X-Spam-Report: SpamAssassin version 3.1.9 on srv5.dvmed.net summary: Content analysis details: (-4.4 points, 5.0 required) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1017 Lines: 29 Theodore Tso wrote: > On Sat, Dec 08, 2007 at 11:33:57AM -0600, Mike McGrath wrote: >>> Huh? What's the concern? All you are submitting is a list of >>> hardware devices in your system. That's hardly anything sensitive.... >> We actually had a very vocal minority about all of that which ended up >> putting us in the unfortunate position of generating a random UUID instead >> of using a hardware UUID from hal :-/ > > Tinfoil hat responses indeed! Ok, if those folks are really that > crazy, my suggestion then would be to do a "ifconfig -a > /dev/random" heh, along those lines you could also do dmesg > /dev/random dmesg often has machine-unique identifiers of all sorts (including the MAC address, if you have an ethernet driver loaded) Jeff -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/