From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.io/gmane.emacs.gnus.general/70345 Path: news.gmane.org!not-for-mail From: Steinar Bang Newsgroups: gmane.emacs.gnus.general Subject: Re: Built-in HTML renderer in Emacs? Date: Thu, 02 Sep 2010 14:29:04 +0200 Organization: Probably a good idea Message-ID: References: <87vd6pig2y.fsf@lifelogs.com> <87occhfl77.fsf@lifelogs.com> <87d3sxfkhc.fsf@lifelogs.com> <878w3lfjgd.fsf@lifelogs.com> <87d3sx8gkq.fsf@lifelogs.com> <871v9d8dj2.fsf@lifelogs.com> <87tym96wrz.fsf@lifelogs.com> <87r5hdnowx.fsf@dod.no> <87hbi85zfv.fsf@rimspace.net> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: dough.gmane.org 1283430579 30866 80.91.229.12 (2 Sep 2010 12:29:39 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Thu, 2 Sep 2010 12:29:39 +0000 (UTC) To: ding@gnus.org Original-X-From: ding-owner+M18730@lists.math.uh.edu Thu Sep 02 14:29:36 2010 Return-path: Envelope-to: ding-account@gmane.org Original-Received: from util0.math.uh.edu ([129.7.128.18]) by lo.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1Or8vA-0001Pw-FS for ding-account@gmane.org; Thu, 02 Sep 2010 14:29:36 +0200 Original-Received: from localhost ([127.0.0.1] helo=lists.math.uh.edu) by util0.math.uh.edu with smtp (Exim 4.63) (envelope-from ) id 1Or8uw-0008Ae-Qy; Thu, 02 Sep 2010 07:29:22 -0500 Original-Received: from mx2.math.uh.edu ([129.7.128.33]) by util0.math.uh.edu with esmtps (TLSv1:AES256-SHA:256) (Exim 4.63) (envelope-from ) id 1Or8uv-0008AN-4K for ding@lists.math.uh.edu; Thu, 02 Sep 2010 07:29:21 -0500 Original-Received: from quimby.gnus.org ([80.91.231.51]) by mx2.math.uh.edu with esmtp (Exim 4.72) (envelope-from ) id 1Or8ut-0003Rx-He for ding@lists.math.uh.edu; Thu, 02 Sep 2010 07:29:20 -0500 Original-Received: from lo.gmane.org ([80.91.229.12]) by quimby.gnus.org with esmtp (Exim 3.36 #1 (Debian)) id 1Or8us-0004Hs-00 for ; Thu, 02 Sep 2010 14:29:18 +0200 Original-Received: from list by lo.gmane.org with local (Exim 4.69) (envelope-from ) id 1Or8ur-0001Ei-Ec for ding@gnus.org; Thu, 02 Sep 2010 14:29:17 +0200 Original-Received: from 62.113.137.5 ([62.113.137.5]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Thu, 02 Sep 2010 14:29:17 +0200 Original-Received: from sb by 62.113.137.5 with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Thu, 02 Sep 2010 14:29:17 +0200 X-Injected-Via-Gmane: http://gmane.org/ Mail-Followup-To: ding@gnus.org Original-Lines: 21 Original-X-Complaints-To: usenet@dough.gmane.org X-Gmane-NNTP-Posting-Host: 62.113.137.5 Mail-Copies-To: never User-Agent: Gnus/5.110011 (No Gnus v0.11) Emacs/21.3 (gnu/linux) Cancel-Lock: sha1:4skdCFaWfyjGqG2A/eDNMUSFMpw= X-Spam-Score: -0.7 (/) List-ID: Precedence: bulk Xref: news.gmane.org gmane.emacs.gnus.general:70345 Archived-At: >>>>> Daniel Pittman : > If I email you a message with a one pixel transparent image and the URL... > http://rimspace.net/steinar-bang-read-this.gif > ...I can tell if you did, in fact, read my mail by checking the Apache > logs. Substitute in less obvious naming and a database and you can > see where this might leak information you don't especially want like > "did you open the email". I understand that bit. What I wasn't sure of was why they went for 1x1 pixel images? The network overhead of an HTTP request is so that whether the payload is near to zero bytes, or a handful of kilobytes, the extra load from fetching the image shouldn't be noticable in the HTTP traffic resulting from loading a typical HTML page, and fetching everything it refers to. And if looking for 1x1 pixel images made them easy to recognize I would have thought that would be something to avoid...?