From: Stainless Steel Rat <ratinox@peorth.gweep.net>
Subject: Re: new spam functionality added
Date: Wed, 31 Jul 2002 22:17:15 -0400 [thread overview]
Message-ID: <m3k7nb8gr8.fsf@peorth.gweep.net> (raw)
In-Reply-To: <oydado7icrx.fsf@sam.cs.rice.edu> (Scott A Crosby's message of "31 Jul 2002 20:33:06 -0500")
* Scott A Crosby <scrosby@cs.rice.edu> on Wed, 31 Jul 2002
| Unlikely. If the hashcash is redeemable for cash, then either it has
| to be about $.0001,
Er... no. There is money directly involved. In brief, hashcash works like
this:
You want to send me mail. You compose your message and hand it off to your
MTA for delivery. Your MTA contacts my MTA. My MTA generates a random
string (a random number) and mashes it through SHA-1. My MTA gives your
MTA that string and says, "find me another string that has an SHA-1 hash
with N bits of collision". Your MTA spends a few seconds generating random
strings and mashing them through SHA-1 until it generates a hash that has N
similar bits. Your MTA gives me that string. My MTA validates it, and
then accepts your message.
The idea is to make every sending MTA spend a bit of CPU time doing
something in a proveable way before accepting their messages. Spammers
simply will not be able to survive because it will take too long for their
rogue spamware MTAs to push out their junk.
--
Rat <ratinox@peorth.gweep.net> \ Do not use Happy Fun Ball on concrete.
Minion of Nathan - Nathan says Hi! \
PGP Key: at a key server near you! \
That and five bucks will get you a small coffee at Starbucks.
next prev parent reply other threads:[~2002-08-01 2:17 UTC|newest]
Thread overview: 144+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-07-31 19:24 Ted Zlatanov
2002-07-31 19:54 ` Scott A Crosby
2002-07-31 20:07 ` Ted Zlatanov
2002-07-31 20:14 ` Simon Josefsson
2002-07-31 20:25 ` Josh Huber
2002-07-31 20:34 ` Scott A Crosby
2002-07-31 20:41 ` Josh Huber
2002-07-31 21:03 ` Stainless Steel Rat
2002-07-31 21:08 ` Stainless Steel Rat
2002-07-31 21:12 ` Josh Huber
2002-07-31 21:38 ` Paul Jarc
2002-07-31 23:19 ` David Masterson
2002-07-31 23:08 ` Frank Schmitt
2002-08-01 17:03 ` Josh Huber
2002-08-01 17:38 ` Harry Putnam
2002-08-01 19:16 ` Scott A Crosby
2002-08-01 22:43 ` Harry Putnam
2002-08-05 17:16 ` Per Abrahamsen
2002-08-01 1:25 ` Stainless Steel Rat
2002-08-01 1:33 ` Scott A Crosby
2002-08-01 2:17 ` Stainless Steel Rat [this message]
2002-08-01 19:20 ` David Masterson
2002-08-01 20:00 ` Stainless Steel Rat
2002-08-02 23:37 ` Florian Weimer
2002-08-02 23:45 ` Russ Allbery
2002-08-03 10:23 ` Simon Josefsson
2002-08-03 13:47 ` Stainless Steel Rat
2002-08-03 16:01 ` hashcash (was Re: new spam functionality added) Simon Josefsson
2002-08-04 6:55 ` Stainless Steel Rat
2002-08-01 19:17 ` new spam functionality added David Masterson
2002-08-01 19:59 ` Stainless Steel Rat
2002-07-31 21:07 ` Scott A Crosby
2002-07-31 21:35 ` Paul Jarc
2002-07-31 21:58 ` Josh Huber
2002-07-31 21:47 ` Josh Huber
2002-07-31 21:54 ` Paul Jarc
2002-07-31 22:05 ` Josh Huber
2002-07-31 22:10 ` Paul Jarc
2002-07-31 22:35 ` Scott A Crosby
2002-07-31 23:10 ` Josh Huber
2002-08-01 16:56 ` Paul Jarc
2002-07-31 23:30 ` Alan Shutko
2002-08-01 19:25 ` David Masterson
2002-08-01 19:33 ` Josh Huber
2002-08-01 22:06 ` Scott A Crosby
2002-08-01 22:13 ` Paul Jarc
2002-08-01 22:18 ` Jack Twilley
2002-08-01 22:23 ` TMDA (was: new spam functionality added) Paul Jarc
2002-08-01 22:40 ` Scott A Crosby
2002-08-01 23:29 ` Josh Huber
2002-08-02 2:11 ` Scott A Crosby
2002-08-01 19:34 ` new spam functionality added Ted Zlatanov
2002-08-01 19:39 ` Paul Jarc
2002-08-01 21:38 ` Simon Josefsson
2002-08-23 1:50 ` Ted Zlatanov
2002-08-23 2:42 ` Katsumi Yamaoka
2002-08-23 3:10 ` Ted Zlatanov
2002-12-30 0:10 ` Lars Magne Ingebrigtsen
2002-12-30 2:31 ` Ted Zlatanov
2002-12-30 2:52 ` Lars Magne Ingebrigtsen
2002-12-30 3:13 ` Ted Zlatanov
2002-12-30 3:27 ` Lars Magne Ingebrigtsen
2002-12-30 3:44 ` Ted Zlatanov
2002-12-30 4:12 ` Lars Magne Ingebrigtsen
2002-12-30 4:48 ` Ted Zlatanov
2002-12-30 5:08 ` Lars Magne Ingebrigtsen
2002-12-30 19:03 ` spam.el now supports blackholes by default Ted Zlatanov
2002-12-30 21:41 ` Matt Armstrong
2002-12-30 22:42 ` Ted Zlatanov
2002-12-30 23:38 ` spam.el proposed group parameters Ted Zlatanov
2002-12-31 0:02 ` Lars Magne Ingebrigtsen
2003-01-05 16:58 ` spam.el now supports blackholes by default luis fernandes
2003-01-05 22:07 ` Ted Zlatanov
2003-01-06 2:15 ` Lars Magne Ingebrigtsen
2002-08-02 2:05 ` new spam functionality added Jason R. Mastaler
2002-08-02 3:43 ` Russ Allbery
2002-08-02 4:29 ` Jason R. Mastaler
2002-08-02 4:34 ` Russ Allbery
2002-08-02 16:17 ` TMDA (was: new spam functionality added) Paul Jarc
2002-08-02 21:46 ` Russ Allbery
2002-08-02 21:53 ` Paul Jarc
2002-08-05 17:38 ` Per Abrahamsen
2002-08-05 17:49 ` Paul Jarc
2002-08-05 17:57 ` Simon Josefsson
2002-08-05 20:18 ` David Masterson
2002-08-05 20:46 ` Stainless Steel Rat
2002-08-05 21:50 ` Russ Allbery
2002-08-06 0:43 ` Stainless Steel Rat
2002-08-06 3:04 ` David Masterson
2002-08-06 14:27 ` Stainless Steel Rat
2002-08-06 17:13 ` David Masterson
2002-08-06 17:26 ` David Masterson
2002-08-06 18:08 ` Stainless Steel Rat
2002-08-07 12:02 ` Lloyd Zusman
2002-12-30 0:22 ` Hashcash (was: TMDA) Lars Magne Ingebrigtsen
2003-01-02 18:33 ` Hashcash Simon Josefsson
2003-01-02 19:25 ` Hashcash Lars Magne Ingebrigtsen
2003-01-02 21:01 ` Hashcash Simon Josefsson
2003-01-02 21:05 ` Hashcash Lars Magne Ingebrigtsen
2002-08-05 18:30 ` TMDA (was: new spam functionality added) Stainless Steel Rat
2002-08-05 20:46 ` David Masterson
2002-08-05 21:33 ` Stainless Steel Rat
2002-08-06 3:28 ` David Masterson
2002-08-06 16:02 ` Paul Jarc
2002-08-08 9:21 ` Steinar Bang
2002-08-08 15:34 ` Paul Jarc
2002-08-08 19:57 ` Steinar Bang
2002-08-08 20:17 ` Paul Jarc
2002-08-08 21:30 ` Steinar Bang
2002-08-08 21:35 ` Paul Jarc
2002-08-08 22:27 ` Steinar Bang
2002-08-08 17:26 ` Matt Armstrong
2002-08-08 20:23 ` Steinar Bang
2002-08-09 19:32 ` Matt Armstrong
2002-08-10 9:23 ` Steinar Bang
2002-08-10 17:21 ` Paul Jarc
2002-08-11 8:41 ` Steinar Bang
2002-08-11 14:58 ` Steinar Bang
2002-08-11 8:47 ` Steinar Bang
2002-08-12 16:04 ` Paul Jarc
2002-08-12 21:38 ` Steinar Bang
2002-08-12 22:40 ` Paul Jarc
2002-08-13 9:21 ` Steinar Bang
2002-08-05 20:11 ` David Masterson
2002-08-06 2:15 ` Scott A Crosby
2002-08-06 10:10 ` Per Abrahamsen
2002-08-06 13:20 ` Scott A Crosby
2002-08-06 16:13 ` Per Abrahamsen
2002-08-16 14:23 ` new spam functionality added clemens fischer
2002-08-05 17:07 ` Per Abrahamsen
2002-07-31 20:46 ` Jack Twilley
2002-07-31 21:01 ` Josh Huber
2002-07-31 21:03 ` Simon Josefsson
2002-07-31 21:51 ` David Masterson
2002-07-31 21:08 ` Simon Josefsson
2002-07-31 22:05 ` David Masterson
2002-07-31 23:32 ` Alan Shutko
2002-08-01 17:00 ` Paul Jarc
2002-08-05 18:07 ` Simon Josefsson
2002-08-05 18:23 ` TMDA (was: new spam functionality added) Paul Jarc
2002-08-05 23:41 ` Simon Josefsson
2002-08-06 10:27 ` Per Abrahamsen
2002-08-06 15:57 ` Paul Jarc
2002-07-31 20:35 ` new spam functionality added Ted Zlatanov
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