Re: [Asrg] An Anti-Spam Heuristic
John Leslie <john@jlc.net> Thu, 13 December 2012 19:02 UTC
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Date: Thu, 13 Dec 2012 14:02:51 -0500
From: John Leslie <john@jlc.net>
To: Anti-Spam Research Group - IRTF <asrg@irtf.org>
Message-ID: <20121213190251.GE37893@verdi>
References: <SNT002-W143FB9A867C92FA80D90E04C54E0@phx.gbl> <20121213140359.GA2187@gsp.org> <121213072401.ZM29345@torch.brasslantern.com>
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Subject: Re: [Asrg] An Anti-Spam Heuristic
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Bart Schaefer <schaefer@brasslantern.com> wrote: > On Dec 13, 9:03am, Rich Kulawiec wrote: >} [Adam Sobieski <adamsobieski@hotmail.com> wrote:] >} >}> A number of heuristics include increasing the computation required to >}> send and receive an email, for example one to a few minutes of computation >}> per email on desktop computers. >} >} I don't think you can do this. I think you're trying to drown someone >} who owns the ocean, and that the attempt is futile. But perhaps you have >} an approach that's eluded others, that overcomes the obvious problems, >} and I just don't see it yet due to insufficient caffeine intake. It's not sufficient to prove some value was expended: something of value must be transferred to the receiving SMTP server (if not all the way to the reader). > Generating "cash" with computing resources means they can print all the > money they want. For a pay-to-play scheme to have any hope of working, > it needs to be based on a resource that can be controlled from outside. I'm not sure "controlled from outside" can work... > Which leads to the same discussion we had four years ago. Today is the > anniversary of http://tools.ietf.org/html/draft-irtf-asrg-postage-00 > which never went went anywhere beyond that. Indeed it is, Bart! I'll treat you and Ben to a virtual beverage and four virtual candles. ;^) > It is acknowledged that the bad guys can steal postage from a zombied > system almost as easily as they can steal compute resources, but it's > easier to discover and react to the theft of something that doesn't > invisibly regenerate. It's better yet to react to actual value received. ;^) The snail-mail systems _are_ sender-pays systems, but it's only the perceived value-received that causes snail-mail recipients to open an envelope. (I'm not holding my breath on anything happening with ePostage, but I remain willing to work with anybody else with the energy to pursue it.) -- John Leslie <john@jlc.net>
- [Asrg] An Anti-Spam Heuristic Adam Sobieski
- Re: [Asrg] An Anti-Spam Heuristic Steve Atkins
- Re: [Asrg] An Anti-Spam Heuristic Barry Shein
- Re: [Asrg] An Anti-Spam Heuristic John Levine
- Re: [Asrg] An Anti-Spam Heuristic Adam Sobieski
- Re: [Asrg] An Anti-Spam Heuristic John Levine
- [Asrg] The Real Problem (was: An Anti-Spam Heuris… Andrew Sullivan
- Re: [Asrg] An Anti-Spam Heuristic Rich Kulawiec
- Re: [Asrg] An Anti-Spam Heuristic Bill Cole
- Re: [Asrg] An Anti-Spam Heuristic Bart Schaefer
- Re: [Asrg] The Real Problem Chris Lewis
- Re: [Asrg] The Real Problem Alessandro Vesely
- Re: [Asrg] An Anti-Spam Heuristic Barry Shein
- Re: [Asrg] An Anti-Spam Heuristic Michael Thomas
- Re: [Asrg] The Real Problem (was: An Anti-Spam He… Barry Shein
- Re: [Asrg] An Anti-Spam Heuristic Barry Shein
- Re: [Asrg] An Anti-Spam Heuristic John Leslie
- Re: [Asrg] An Anti-Spam Heuristic Seth
- Re: [Asrg] An Anti-Spam Heuristic Steve Atkins
- Re: [Asrg] An Anti-Spam Heuristic Barry Shein
- Re: [Asrg] An Anti-Spam Heuristic Steve Atkins
- Re: [Asrg] An Anti-Spam Heuristic Barry Shein
- Re: [Asrg] An Anti-Spam Heuristic Barry Shein
- Re: [Asrg] An Anti-Spam Heuristic Chris Lewis
- Re: [Asrg] An Anti-Spam Heuristic Barry Shein
- Re: [Asrg] An Anti-Spam Heuristic Michael Thomas
- Re: [Asrg] An Anti-Spam Heuristic Chris Lewis
- Re: [Asrg] An Anti-Spam Heuristic Chris Lewis
- [Asrg] Countering Botnets to Reduce Spam Adam Sobieski
- Re: [Asrg] Countering Botnets to Reduce Spam Chris Lewis
- Re: [Asrg] An Anti-Spam Heuristic Martijn Grooten
- Re: [Asrg] An Anti-Spam Heuristic Adam Sobieski
- Re: [Asrg] Countering Botnets to Reduce Spam Rich Kulawiec
- Re: [Asrg] Countering Botnets to Reduce Spam Adam Sobieski
- Re: [Asrg] Countering Botnets to Reduce Spam Chris Lewis
- Re: [Asrg] Countering Botnets to Reduce Spam Rich Kulawiec
- Re: [Asrg] An Anti-Spam Heuristic John Levine
- Re: [Asrg] An Anti-Spam Heuristic John Levine
- Re: [Asrg] Countering Botnets to Reduce Spam John Levine
- Re: [Asrg] An Anti-Spam Heuristic Chris Lewis
- Re: [Asrg] Countering Botnets to Reduce Spam Chris Lewis
- Re: [Asrg] Countering Botnets to Reduce Spam Chris Lewis
- Re: [Asrg] Countering Botnets to Reduce Spam Barry Shein
- Re: [Asrg] Countering Botnets to Reduce Spam Chris Lewis
- Re: [Asrg] An Anti-Spam Heuristic Alessandro Vesely
- Re: [Asrg] An Anti-Spam Heuristic Chris Lewis