From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.io/gmane.emacs.gnus.general/45434 Path: main.gmane.org!not-for-mail From: Stainless Steel Rat Newsgroups: gmane.emacs.gnus.general Subject: Re: [ANNOUNCE] contrib/hashcash.el spam fighter Date: Sat, 29 Jun 2002 10:05:02 -0400 Organization: The Happy Fun Ball Brigade Sender: owner-ding@hpc.uh.edu Message-ID: References: <02Jun24.115740edt.119250@gateway.intersystems.com> <02Jun24.151839edt.119751@gateway.intersystems.com> <02Jun25.104630edt.119271@gateway.intersystems.com> <02Jun28.122222edt.119118@gateway.intersystems.com> <02Jun28.172137edt.119392@gateway.intersystems.com> NNTP-Posting-Host: localhost.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: main.gmane.org 1025359548 7106 127.0.0.1 (29 Jun 2002 14:05:48 GMT) X-Complaints-To: usenet@main.gmane.org NNTP-Posting-Date: Sat, 29 Jun 2002 14:05:48 +0000 (UTC) Return-path: Original-Received: from malifon.math.uh.edu ([129.7.128.13]) by main.gmane.org with esmtp (Exim 3.33 #1 (Debian)) id 17OIrE-0001qU-00 for ; Sat, 29 Jun 2002 16:05:48 +0200 Original-Received: from sina.hpc.uh.edu ([129.7.128.10] ident=lists) by malifon.math.uh.edu with esmtp (Exim 3.20 #1) id 17OIqp-00010r-00; Sat, 29 Jun 2002 09:05:23 -0500 Original-Received: by sina.hpc.uh.edu (TLB v0.09a (1.20 tibbs 1996/10/09 22:03:07)); Sat, 29 Jun 2002 09:05:43 -0500 (CDT) Original-Received: from sclp3.sclp.com (qmailr@sclp3.sclp.com [209.196.61.66]) by sina.hpc.uh.edu (8.9.3/8.9.3) with SMTP id JAA01258 for ; Sat, 29 Jun 2002 09:05:29 -0500 (CDT) Original-Received: (qmail 11378 invoked by alias); 29 Jun 2002 14:05:03 -0000 Original-Received: (qmail 11373 invoked from network); 29 Jun 2002 14:05:03 -0000 Original-Received: from h0060978d8c91.ne.client2.attbi.com (HELO peorth.gweep.net) (rcajjj@24.218.202.161) by gnus.org with SMTP; 29 Jun 2002 14:05:03 -0000 Original-Received: (from ratinox@localhost) by peorth.gweep.net (8.11.6/8.11.6) id g5TE52F03047; Sat, 29 Jun 2002 10:05:02 -0400 Original-To: Gnus Mailing List X-Attribution: Rat In-Reply-To: (Jan Rychter's message of "Sat, 29 Jun 2002 13:56:49 +0200") Original-Lines: 27 User-Agent: Gnus/5.090006 (Oort Gnus v0.06) XEmacs/21.1 (Cuyahoga Valley, i686-pc-linux) Precedence: list X-Majordomo: 1.94.jlt7 Xref: main.gmane.org gmane.emacs.gnus.general:45434 X-Report-Spam: http://spam.gmane.org/gmane.emacs.gnus.general:45434 * Jan Rychter on Sat, 29 Jun 2002 | I guess this discussion is a bit off-topic, but since it continues | anyway, I'll drop in: I don't think I will use hashcash in any | foreseeable future. The reason is quite simple: the price I have to pay | is too high. CPU time is _expensive_, if you work on a laptop computer | where battery life and power (heat!) are valuable commodities. Laptops | are not made for continuous CPU usage. Actually, hashcash -- not X-Hashcash -- is transparent to the end user. It runs at the MTA level, entirely behind the scenes, with no user interaction. And if you do not run a local MTA then you will not see even that. Real hashcash -- NOT X-Hashcash!!!! They are not the same thing! -- does not force senders to spend hours and hours calculating a single hash collision. The idea is to make him spend 5 or 6 seconds calculating a single collision. That is negligible for most legitimate uses, but for spammers sending out bulk, that 5 seconds times 5 million is thousands of hours of CPU time. That is where hashcash works... and X-Hashcash does not, so PLEASE! do not confuse the two or treat them as the same thing. Thank you. -- Rat \ If Happy Fun Ball begins to smoke, get Minion of Nathan - Nathan says Hi! \ away immediately. Seek shelter and cover PGP Key: at a key server near you! \ head. That and five bucks will get you a small coffee at Starbucks.