From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Manoj Srivastava Newsgroups: gmane.emacs.devel,gmane.emacs.gnus.general Subject: Re: New Emacs facilities from Gnus Date: Sun, 04 Nov 2007 14:36:33 -0600 Organization: Manoj Srivastava's Home Message-ID: <873avlsq7i.fsf@anzu.internal.golden-gryphon.com> References: <87zly3y4ru.fsf@catnip.gol.com> <87odejy30k.fsf@catnip.gol.com> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: ger.gmane.org 1194208642 4160 80.91.229.12 (4 Nov 2007 20:37:22 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sun, 4 Nov 2007 20:37:22 +0000 (UTC) Cc: ding@gnus.org To: emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Sun Nov 04 21:37:25 2007 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.50) id 1IomDl-0001Pi-Gs for ged-emacs-devel@m.gmane.org; Sun, 04 Nov 2007 21:37:25 +0100 Original-Received: from localhost ([127.0.0.1] helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1IomDa-0006qt-R1 for ged-emacs-devel@m.gmane.org; Sun, 04 Nov 2007 15:37:14 -0500 Original-Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1IomDY-0006ql-5w for emacs-devel@gnu.org; Sun, 04 Nov 2007 15:37:12 -0500 Original-Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1IomDW-0006qN-Mi for emacs-devel@gnu.org; Sun, 04 Nov 2007 15:37:11 -0500 Original-Received: from [199.232.76.173] (helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1IomDW-0006qK-HZ for emacs-devel@gnu.org; Sun, 04 Nov 2007 15:37:10 -0500 Original-Received: from main.gmane.org ([80.91.229.2] helo=ciao.gmane.org) by monty-python.gnu.org with esmtps (TLS-1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.60) (envelope-from ) id 1IomDV-0000Qk-VQ for emacs-devel@gnu.org; Sun, 04 Nov 2007 15:37:10 -0500 Original-Received: from list by ciao.gmane.org with local (Exim 4.43) id 1IomDM-0007En-Ak for emacs-devel@gnu.org; Sun, 04 Nov 2007 20:37:00 +0000 Original-Received: from tiamat.golden-gryphon.com ([204.117.95.118]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sun, 04 Nov 2007 20:37:00 +0000 Original-Received: from srivasta by tiamat.golden-gryphon.com with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sun, 04 Nov 2007 20:37:00 +0000 X-Injected-Via-Gmane: http://gmane.org/ Mail-Followup-To: emacs-devel@gnu.org Original-Lines: 42 Original-X-Complaints-To: usenet@ger.gmane.org X-Gmane-NNTP-Posting-Host: tiamat.golden-gryphon.com User-Agent: Gnus/5.110007 (No Gnus v0.7) Emacs/23.0.50 (gnu/linux) (x86_64-unknown-linux-gnu) Face: iVBORw0KGgoAAAANSUhEUgAAACYAAAAwCAMAAABKbPgaAAAAM1BMVEUAAADIjH/0rp1KPz79 0b+ic2nlpJc2Ly2AY17VlYb4uqi2gHQXFBN2WVXgno5iT02Xa2Nx+jaIAAACVElEQVQ4jeWU23bj IAxFLUAggQX6/6+dI9LGTpo+9mlYiXNhc3TnOP50naZE0tqvgEk+soutnNfQ8yPTWMTENhNrjI+Y +N7POVt8tAzpn2vJlsmttbyfrdkP7hx5iezteGzsbOts7xT+tC1mcG+LtRP2X/16bEQExuyx1uZW vscrAWUT8aE0aDBeBuw8nS5u4WgWyDCllOZUBeyWgbWbGrBsTDpTx0qpphlcYPcgJLvBXFClPMg5 6WH2JidLIAaDF5aAed7uPTH4bjw0bZvfajp2tHc1F+cBm+Vr9YomGSwNhbmcczYEWUu5MBpYvCLV F+ZIKwQfYB+CBXnIRQFvIRhK6l96PemsFLEPFxi+MPxiTYH0Ave1InPsIYes3NJb42ytBSmmysyj lIQYHJm6Im1WbQ0kWMesKFRFPKTDzJ3GhWUn2KWKEkWlKthoACLm2eWJQQh2qKbAUgQxa+8TVjn1 aySm8656ookCfCc5TRzvnZ6YOu3NpHg+uR5YuRkNF/b5IHq5Y7Ve6c2+sR4hqIZ3+5DCt3ukh8Eo vFIXVJxqfMdbkd/BF3YaQkB/2RIUHPMS7RLVAHefrYzWZVQ/ei4peBsROFLi90ltQyvF5I05t4Zs L4C9DODJ2AZCUf8UitGjCIdfx15QQkfZibTOGT3edxns5fY6F2rstKcTwiiaJnQwvYkdzTlaTqNH IkSmGdLrON45tGsMNDoSYr4bxH5emHEFaoFjKBahHXFXfLx9cR9p6ejJXihuxPz57gWHZkWovbPl 9gsU8eImtBi++3D+f+sfT/Mg79fyEz8AAAAASUVORK5CYII= X-URL: http://www.golden-gryphon.com/ Mail-Copies-To: never X-Face: #q.#]5@vq!Jz+E0t_/; Y^gTjR\T^"B'fbeuVGiyKrvbfKJl!^e|e:iu(kJ6c|QYB57LP*|t &YlP~HF/=h:GA6o6W@I#deQL-%#.6]!z:6Cj0kd#4]>*D, |0djf'CVlXkI, >aV4\}?d_KEqsN{Nnt7 78"OsbQ["56/!nisvyB/uA5Q.{)gm6?q.j71ww.>b9b]-sG8zNt%KkIa>xWg&1VcjZk[hBQ>]j~`Wq Xl,y1a!(>6`UM{~'X[Y_,Bv+}=L\SS*mA8=s;!=O`ja|@PEzb&i0}Qp,`Z\:6:OmRi* Cancel-Lock: sha1:A5HWmZh92Z/i28OEndq0MfWaneY= X-detected-kernel: by monty-python.gnu.org: Linux 2.6, seldom 2.4 (older, 4) X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:82517 gmane.emacs.gnus.general:65548 Archived-At: Hi, On Sun, 04 Nov 2007 14:56:48 -0500, Richard Stallman said: > ;;; hashcash.el --- Add hashcash payments to email > ;; Maintainer: Paul Foley > What does this do? What are hashcash payments? This is a device used for fighting Spam. The sender creates a header in the outgoing mail for each recipient; this hash is computationally expensive to create, but easy to veryfy, asnd the string used as input contain the destination address and a timestamp, so it is not easy to reuse. Popular Spam prevention software like spamassassin verifies the hash, and if successful, scores the mail as not Spam. It also creates a store of hashcash numbers found to prevent replay attacks. So, as a sender, I have my computer spend a few seconds while sending out mail in return for a higher likelyhood that my email does not end up in the spam filter. The example given on the hashcash page is: % echo -n 0:030626:adam@cypherspace.org:6470e06d773e05a8 | sha1 00000000c70db7389f241b8f441fcf068aead3f0 This is a hashcash created for adam@cypherspace.org on 03/06/26, which has an 32-bit collision with the all 0 string. > Will this work with sendmail.el and rmail.el? It does work with sendmail.el, as far as I can tell. manoj http://www.hashcash.org/faq/ -- It's not that I'm afraid to die. I just don't want to be there when it happens. Woody Allen Manoj Srivastava 1024D/BF24424C print 4966 F272 D093 B493 410B 924B 21BA DABB BF24 424C