Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752127AbXLHSHS (ORCPT ); Sat, 8 Dec 2007 13:07:18 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750997AbXLHSHE (ORCPT ); Sat, 8 Dec 2007 13:07:04 -0500 Received: from thunk.org ([69.25.196.29]:42710 "EHLO thunker.thunk.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750989AbXLHSHB (ORCPT ); Sat, 8 Dec 2007 13:07:01 -0500 Date: Sat, 8 Dec 2007 13:05:57 -0500 From: Theodore Tso To: Matt Mackall Cc: Jon Masters , Mike McGrath , 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? Message-ID: <20071208180557.GL17037@thunk.org> Mail-Followup-To: Theodore Tso , Matt Mackall , Jon Masters , Mike McGrath , Alan Cox , Ray Lee , Adrian Bunk , Marc Haber , linux-kernel@vger.kernel.org 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> <20071208174343.GK19691@waste.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20071208174343.GK19691@waste.org> User-Agent: Mutt/1.5.15+20070412 (2007-04-11) X-SA-Exim-Connect-IP: X-SA-Exim-Mail-From: tytso@thunk.org X-SA-Exim-Scanned: No (on thunker.thunk.org); SAEximRunCond expanded to false Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 957 Lines: 20 On Sat, Dec 08, 2007 at 11:43:43AM -0600, Matt Mackall wrote: > > Huh? What's the concern? All you are submitting is a list of > > hardware devices in your system. That's hardly anything sensitive.... > > Using MAC addresses -does- de-anonymize things though and presumably > anonymous collection is a stated goal. True, but for many machines, the MAC address is enough for someone knowledgeable to (at least) determine what the manufacturer of your machine is, and in many cases, the model number of your laptop (since MAC addresses are assigned sequentially) and thus people can have a very good idea of the contents of your PCI tree ---- if for some reason anyone would even care, of course! - Ted -- 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/